CN100573613C - A kind of analog ultrasonic wave earthquake signal physical excitation, receiving system and method thereof - Google Patents
A kind of analog ultrasonic wave earthquake signal physical excitation, receiving system and method thereof Download PDFInfo
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- CN100573613C CN100573613C CNB2007100639513A CN200710063951A CN100573613C CN 100573613 C CN100573613 C CN 100573613C CN B2007100639513 A CNB2007100639513 A CN B2007100639513A CN 200710063951 A CN200710063951 A CN 200710063951A CN 100573613 C CN100573613 C CN 100573613C
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Abstract
A kind of analog ultrasonic wave earthquake signal physical excitation of the present invention, receiving system and method thereof.Comprise driving source, ultrasonic emitting probe, ultrasound wave receiving transducer, analog to digital converter, amplifier, central signal processing and control element (PCE) and I/O peripheral unit; Also comprise controllable voltage regulating control module that is arranged in the signal excitation source and the gain control unit that is arranged on the received signal of signal receiving end.The present invention carries out quantification control to emitted energy and receiving gain, to satisfy the needs of the complicated multilayer physical model observation in laboratory.Be the increase of one aspect of the present invention in driving source quantitative control wave step of transmitting and structure, feasible high low amplitude to emitted energy is able to quantification control, for co-channel signals not, specifically quantitatively set, increase the step and the structure of quantitative control enlargement factor on the other hand in the amplifier in receiving end, solved the technical matters of the low and received signal distortion of degree of accuracy in the prior art.
Description
Technical field:
The present invention relates to a kind of ultrasonic emitting and receiving detection device and method thereof, relate in particular to a kind of simulation is carried out ultrasonic listening and detection to geologic model during open-air seismic prospecting under laboratory condition laboratory harvester and method thereof, belong to the ultrasound examination field.
Background technology:
Seismic physical modeling is a kind of effective experimental technique of petroleum exploration and development.It is to satisfy a kind of scientific research methods of carrying out on the basis of the ratio of similitude principle and the principle of correspondence according to model media at its geometric parameter and physical parameter.Modern seismic physical modeling is in the laboratory tectonic structure and the geologic body in field to be made into physical model according to certain simulation ratio, and a kind of earthquake simulation method of utilizing methods such as ultrasound wave that open-air method of seismic prospecting is simulated, it is new wave theory and the phenomenon of exploratory development on the one hand, such as anisotropic PHYSICAL MODELING OF IN etc.; Can also be used to the feasibility of verification method technology and the confidence level of explanation results on the other hand, for example checking of the validity of 3-d seismic exploration etc.Through ultrasonic detection device commonly used geologic model is carried out ultrasound examination at present in the Geophysical Experiment chamber, this device major part has:
1, driving source (pulse producer): the output HIGH voltage burst pulse drives the ultrasonic emitting probe;
2, ultrasonic emitting probe: it is converted to ultrasonic signal with the high voltage narrow pulse signal and is transmitted to testee.A common transmitting site is called a shot point on geology;
3, ultrasound wave receiving transducer: it is converted to voltage signal with the ultrasonic signal that receives.An acceptance point position is commonly referred to together on the geology, and 6000 data will be gathered usually in each road in 0.3 millisecond, and each data is generally 24;
4, amplifier: the weak voltage signal that the ultrasound wave receiving transducer is sent is given analog to digital converter after amplifying.
The ultrasound examination process is such: the ultrasonic emitting probe sends ultrasonic signal, and after this signal arrived the reflecting interface of geologic model, part signal was reflected, and is received after amplification and analog to digital conversion are given Computer Processing by the ultrasound wave receiving transducer.The primary structure of detection system as shown in Figure 1.
Existing ultrasonic detection device all is fixing dead in measuring process in the enlargement factor of the amplifier of the amplitude of the output HIGH voltage burst pulse of signal transmitting terminal and signal receiving end when carrying out data acquisition, can not carry out quantification ground and change.Therefore, when particularly complex model carries out the ultrasound wave collection to model, produced following technical matters:
1, the quantitative high low amplitude of control wave emission of pulse producer in the driving source, cause the technical matters of the low and distortion of degree of accuracy: for co-channel signals not, for reflected signal more a long way can be reflected, the signal source output signal need be transferred big, but this moment is big gun road hyperreflexia closely, and output is cut the top and promptly produced saturated distortion-distortion.And when the signal source output signal hour, the reflection of nearly big gun road is normal, but the reflection in big gun road far away can not reflect because signal is too little.Promptly can't quantitatively be controlled at the amplitude of signal transmitting terminal output HIGH voltage burst pulse according to actual needs.
2, the amplifier in the receiving end can't be specifically according to the difference variation enlargement factor of each stratum to energy absorption and reflection, cause the technical matters of the low and received signal distortion of degree of accuracy: for signal, transmitting of deep layer and shallow-layer is different, generally, the deep reflex signal is weak and the superficial reflex signal is strong.In order to make the reflection of deep layer enough big, the enlargement factor of amplifier need be transferred greatly, but it to be too strong the superficial reflex signal to occur at this moment, top-distortion is cut in output; Otherwise reducing the enlargement factor of amplifier then, the signal of deep layer can't get out-distortion.Because prime amplifier output is given analog to digital converter by long line, when amplifier output signal is more weak, is easy to be subjected to the interference of environmental noise, sometimes little useful signal is submerged in the noise.
Summary of the invention:
Because exist in the prior art because in the driving source pulse producer quantitatively the high low amplitude of control wave emission and the amplifier in the receiving end can't be specifically cause the technical matters of the low and distortion of degree of accuracy equally according to each stratum to the difference variation enlargement factor of energy absorption and reflection, the inventor has developed the present invention, and emitted energy and receiving gain are carried out quantification control to satisfy the needs of the complicated multilayer physical model observation in laboratory.
The technical scheme of a kind of analog ultrasonic wave earthquake signal physical excitation, receiving system is among the present invention:
Described system comprises driving source, ultrasonic emitting probe, ultrasound wave receiving transducer, analog to digital converter, amplifier, central signal processing and control element (PCE) and I/O peripheral unit; Described driving source is used for the output HIGH voltage burst pulse and drives ultrasonic signal; Described ultrasonic emitting probe is used for that the high voltage narrow pulse signal is converted to ultrasonic signal and is transmitted to testee; The ultrasonic signal that described ultrasound wave receiving transducer is used for receiving is converted to voltage signal; Input to analog to digital converter after the voltage signal that described amplifier is used for that the ultrasound wave receiving transducer is sent amplifies and convert digital signal to, be input to the central signal processing and control element (PCE) then and carry out data processing;
Described system also comprises: be arranged on controllable voltage regulating control module and the gain control unit that is arranged on the received signal of signal receiving end in the signal excitation source; Described controllable voltage regulating control module is used for regulating according to different signal road collection the amplitude size of control output pulse signal; The gain control unit of described received signal is used for the different reflected signals that receive that enter described amplifier are carried out that signal gain is regulated and sequential control, and the received signal after amplifying of will gain is transferred to central signal processing and control module after being transformed into digital signal by described analog to digital converter.
Above-mentioned ultrasonic emitting probe and ultrasound wave receiving transducer are ultrasonic transducers, are used for launching by the signal after modulus/digital-to-analog conversion or receiving; Described driving source comprises high voltage burst pulse drive signal generator.
In the application of reality, the described controllable voltage regulating control module that is arranged in the signal excitation source comprises pulse-width controlled module, MCU module, circuit for producing high voltage module, on-off circuit and clock and power module;
Described pulse-width controlled module adopts the accurate counting of CPLD to high-speed clock source, and control pulsewidth width is that unit is adjustable continuously with the 10ns precision;
The described MCU module that comprises the RS232 interface receives pulse-width data and the amplitude data that the central signal processing and control element (PCE) transmits, and the output control signal is controlled exomonental amplitude and width to circuit for producing high voltage module and pulse-width controlled module;
Described circuit for producing high voltage module is used to produce continuously adjustable high pressure;
Described on-off circuit is used for the time width according to pulse-width controlled module output, and control output is with couplings such as the frequency of described ultrasonic emitting probe and impedances;
Described clock and power module: needed MCU drive clock of generation system and CPLD counting clock; Whole low-tension supplies that power module provides system to need.
Comprise at the gain control unit that is arranged on the received signal of signal receiving end described in the application of reality: analog channel module and digital control module;
Described analog channel module comprises analogue amplifier group and multi-way switch group; Described received signal is through inputing to multi-way switch earlier behind the ultrasonic transducer after the preliminary amplification of prime amplifier Ain, select in the An one of amplifier A1 that conducting has different gain amplifier usefulness as requested by the first road multi-way switch (1), after select the conducting output amplifier as requested through the second road multi-way switch (2), the signal after will being amplified by output amplifier is given described analog to digital converter;
Described digital control module comprise the RS232 interface control module, latch, can preset counter and one group of logic control circuit is formed;
When central signal Processing and control module are transferred to control module in the described digital control module with segment delay time, gain number by 232 interfaces, described control module is selected output latch by gain calculating and is controlled the first road multi-way switch (1) and the second road multi-way switch (2) is selected initial signal gain amplifier, described control module of while with first time delay value and second time delay value give first respectively by first output latch (1) and second output latch (2) and can preset counter (1) and second and can preset counter (2).
Above-mentioned described amplifier A1 is to the gain amplifier from 1 to 1024 of An;
After amplifier chose, the total gain amplifier of amplifying circuit was:
Ain gain * Aout gain * (Amplifier Gain that A1 selects in the An)
Described digital control module can be included in the programmed logic chip except that control module and 232 interfaces, control module is DSP or singlechip chip.
The present invention also comprises a kind of analog ultrasonic wave earthquake signal physical excitation and method of reseptance, and technical scheme is:
Described method comprises that driving source produces step, ultrasonic emitting step, ultrasound wave receiving step, analog to digital conversion step, signal amplification procedure, central signal processing and controlled step and I/O step; Described driving source produces step and is used for output HIGH voltage burst pulse driving ultrasonic signal; Described ultrasonic emitting step is used for that the high voltage narrow pulse signal is converted to ultrasonic signal and is transmitted to testee; The ultrasonic signal that described ultrasound wave receiving step is used for receiving is converted to voltage signal; After amplifying, the voltage signal that described signal amplification procedure and analog to digital conversion step are used for that the ultrasound wave receiving step is sent inputs to analog to digital converter; Signal after process signal amplification procedure and the analog to digital conversion step enters the central signal processing and controlled step is carried out data processing;
Also comprise in the described method: the gain control step that in described driving source step, also comprises controllable voltage regulating controlled step and the received signal before described ultrasound wave receiving step; Described controllable voltage regulating controlled step is used for regulating according to different signal road collection the amplitude size of control output pulse signal; The gain control step of described received signal is used for the different reflected signals that receive that enter described amplifier are carried out that signal gain is regulated and sequential control, and the received signal after will gain is transferred in central signal processing and the controlled step by described analog to digital conversion step and carries out data processing.
Driving source produces in the step and comprises high voltage burst pulse drive signal generator in above-mentioned steps; All comprise ultrasonic transducer in described ultrasonic emitting step and the ultrasound wave receiving step, be used for and launch by the signal after modulus/digital-to-analog conversion or to receive; Comprise analog to digital converter in the described analog to digital conversion step; Comprise in the signal amplification procedure in signal amplifier, central signal processing and the controlled step and comprise signal processing chip; The I/O step comprises input/input peripheral.
In practical methods, described controllable voltage regulating controlled step comprises pulse-width controlled process, MCU control procedure, high pressure production process, switch control procedure and clock and power control procedure;
Described pulse-width controlled process adopts the accurate counting of CPLD to high-speed clock source, and control pulsewidth width is that unit is adjustable continuously with the 10ns precision;
The described MCU control procedure that comprises the RS232 interface receives pulse-width data and the amplitude data that central signal is handled and controlled step transmits, and the output control signal is controlled exomonental amplitude and width to high pressure production process and pulse-width controlled process;
Described high pressure produces control procedure and is used to produce continuously adjustable high pressure;
Described switch control procedure is used for the time width through the output of pulse-width controlled process, and control output is with couplings such as described ultrasonic emitting frequency probe and impedances;
Described clock control process is used for needed MCU drive clock of generation system and CPLD counting clock; Whole low-tension supplies that power control procedure provides system to need.
Gain control step in received signal described in the practical methods comprises: analog channel process and digital control process;
Described analog channel process comprises analogue amplifier group and multi-way switch group; Described received signal is through inputing to multi-way switch earlier behind the ultrasonic transducer after the preliminary amplification of prime amplifier Ain, select in the An one of amplifier A1 that conducting has different gain amplifier usefulness as requested by the first road multi-way switch (1), after select the conducting output amplifier as requested through the second road multi-way switch (2), the signal after will being amplified by output amplifier is given described analog to digital converter;
Described digital control process comprise the RS232 interface control module, latch, can preset counter and one group of logic control circuit is formed;
When central signal Processing and controlled step are transferred to the control module in the described digital control process with segment delay time, gain number by 232 interfaces, described control module is selected output latch by gain calculating and is controlled the first road multi-way switch (1) and the second road multi-way switch (2) is selected initial signal gain amplifier, described control module of while with first time delay value and second time delay value give first respectively by first output latch (1) and second output latch (2) and can preset counter (1) and second and can preset counter (2).
Above-mentioned amplifier A1 is to the gain amplifier ratio from 1 to 1024 of An;
After amplifier chose, the total gain amplifier of amplifying circuit was:
Ain gain * Aout gain * (Amplifier Gain that A1 selects in the An)
Described control module is DSP or singlechip chip.
The present invention carries out quantification control to emitted energy and receiving gain, to satisfy the needs of the complicated multilayer physical model observation in laboratory.Be that one aspect of the present invention has increased quantitative control wave step of transmitting and structure in driving source, make to the in addition quantification control of the size of emitted energy, for co-channel signals not, specifically quantitatively set: reflected signal is a long way transferred the signal source output signal greatly, the reflected signal in nearly big gun road is quantitatively controlled the effect that reaches high-fidelity.The step and the structure of quantitative control enlargement factor have been increased on the other hand in the amplifier in receiving end, solved the technical matters of the low and received signal distortion of degree of accuracy in the prior art: for the big enlargement factor of deep layer signal sets, for the little enlargement factor of shallow-layer signal sets or the method for taking not amplify make and the signal accuracy height on each stratum of receiving reduce distortion.
The present invention is greatly improved acquisition quality, shallow, deep layer and closely, display effect a long way greatly improves, and the research work of the exploration of petroleum prospecting and other mineral products is had huge help, has the economic benefit and the social benefit of highly significant.
Description of drawings:
Fig. 1 is the primary structure synoptic diagram of ultrasonic emitting in the prior art/reception detection system;
Fig. 2 is a system module block diagram of the present invention;
Fig. 3 is the inventive method step synoptic diagram;
Fig. 4 is the electrical block diagram of controllable voltage regulating control module of the present invention;
Fig. 5 is the gain control unit synoptic diagram of received signal of the present invention.
Technology contents concrete in each accompanying drawing will be illustrated in conjunction with embodiment.
Embodiment:
Fig. 1 is the primary structure synoptic diagram of ultrasonic emitting in the prior art/reception detection system
Through ultrasonic detection device commonly used geologic model is carried out ultrasound examination at present in the Geophysical Experiment chamber, this device major part has:
1, driving source (pulse producer): the output HIGH voltage burst pulse drives the ultrasonic emitting probe;
2, ultrasonic emitting probe: it is converted to ultrasonic signal with the high voltage narrow pulse signal and is transmitted to testee.A common transmitting site is called a shot point on geology;
3, ultrasound wave receiving transducer: it is converted to voltage signal with the ultrasonic signal that receives.An acceptance point position is commonly referred to together on the geology, and 6000 data will be gathered usually in each road in 0.3 millisecond, and each data is generally 24;
4, amplifier: the weak voltage signal that the ultrasound wave receiving transducer is sent is given analog to digital converter after amplifying.
The ultrasound examination process is such: the ultrasonic emitting probe sends ultrasonic signal, and after this signal arrived the reflecting interface of geologic model, part signal was reflected, and is received after amplification and analog to digital conversion are given Computer Processing by the ultrasound wave receiving transducer.The primary structure of detection system as shown in Figure 1.
Fig. 2 is a system module block diagram of the present invention.
The technical scheme of a kind of analog ultrasonic wave earthquake signal physical excitation, receiving system is among the present invention:
Described system comprises driving source, ultrasonic emitting probe, ultrasound wave receiving transducer, analog to digital converter, amplifier, central signal processing and control element (PCE) and I/O peripheral unit; Described driving source is used for the output HIGH voltage burst pulse and drives ultrasonic signal; Described ultrasonic emitting probe is used for that the high voltage narrow pulse signal is converted to ultrasonic signal and is transmitted to testee; The ultrasonic signal that described ultrasound wave receiving transducer is used for receiving is converted to voltage signal; After amplifying, the voltage signal that described amplifier is used for that the ultrasound wave receiving transducer is sent inputs to analog to digital converter; Signal after amplifier amplification and analog to digital converter conversion is input to the central signal processing and control element (PCE) and carries out data processing;
Described system also comprises: be arranged on controllable voltage regulating control module and the gain control unit that is arranged on the received signal of signal receiving end in the signal excitation source; Described controllable voltage regulating control module is used for regulating according to different signal road collection the amplitude size of control output pulse signal; The gain control unit of described received signal is used for that the different reflected signal that receives that enters described amplifier is carried out signal gain to be regulated and sequential control, and the received signal that will gain after amplifying is transferred to central signal processing and control module by described analog to digital converter.
Above-mentioned ultrasonic emitting probe and ultrasound wave receiving transducer are ultrasonic transducers, are used for launching by the signal after modulus/digital-to-analog conversion or receiving; Described driving source comprises high voltage burst pulse drive signal generator.
Fig. 3 is the inventive method step synoptic diagram.
The present invention also comprises a kind of analog ultrasonic wave earthquake signal physical excitation and method of reseptance, and technical scheme is:
Described method comprises that driving source produces step, ultrasonic emitting step, ultrasound wave receiving step, analog to digital conversion step, signal amplification procedure, central signal processing and controlled step and I/O step; Described driving source produces step and is used for output HIGH voltage burst pulse driving ultrasonic signal; Described ultrasonic emitting step is used for that the high voltage narrow pulse signal is converted to ultrasonic signal and is transmitted to testee; The ultrasonic signal that described ultrasound wave receiving step is used for receiving is converted to voltage signal; After amplifying, the voltage signal that described signal amplification procedure and analog to digital conversion step are used for that the ultrasound wave receiving step is sent inputs to analog to digital converter; Signal after process signal amplification procedure and the analog to digital conversion step enters the central signal processing and controlled step is carried out data processing;
Also comprise in the described method: produce the gain control step that also comprises controllable voltage regulating controlled step and the received signal before described ultrasound wave receiving step in the step at described driving source; Described controllable voltage regulating controlled step is used for regulating according to different signal road collection the amplitude size of control output pulse signal; The gain control step of described received signal is used for the different reflected signals that receive that enter described amplifier are carried out that signal gain is regulated and sequential control, and the received signal after will gain is transferred in central signal processing and the controlled step by described analog to digital conversion step and carries out data processing.
Driving source generation step comprises high voltage burst pulse drive signal generator in above-mentioned steps; All comprise ultrasonic transducer in described ultrasonic emitting step and the ultrasound wave receiving step, be used for and launch by the signal after modulus/digital-to-analog conversion or to receive; Comprise analog to digital converter in the described analog to digital conversion step; Comprise in the signal amplification procedure in signal amplifier, central signal processing and the controlled step and comprise signal processing chip; The I/O step comprises input/input peripheral.
Concrete step is taked:
1. it is near a long way to the energy distribution data of ultrasonic reflections to gather tested model in advance;
2. it is carried out automatic analyzing and processing and obtain energy distribution curve;
3. adopt the controllable voltage regulating controlled step that the output basis of voltage burst pulse drive signal generator is carried out the segmentation adjustment closely a long way according to energy distribution curve then.
4. adjusted signal is exported to voltage burst pulse drive signal generator;
5. voltage burst pulse drive signal generator is changed back emission by described ultrasonic emitting step to signal with signal on the one hand; Emission process finishes
6. voltage burst pulse drive signal generator is transferred to the central signal processing and control element (PCE) with signal by the analog to digital conversion step on the other hand;
7. the central signal processing and control element (PCE) calculates the amplifier gain curve;
8. received signal that obtains from the ultrasound wave receiving step and central signal processing and control element (PCE) calculate the amplifier gain curve data and import in the gain step of received signal into and operate, and the gain amplifier of input amplifier is carried out segmentation, dynamically adjusts;
9. segmentation, adjusted signal are exported to the analog to digital conversion step, and pass to central signal processing and controlled step;
10. export step: the received signal process finishes, the output result.
Wherein, when solid model is detected, send the probe that is adjusted in energy or gain and carry out when mentioning, do not carry out data acquisition this moment, in order to improve signal to noise ratio (S/N ratio), can be after probe be fixing, same point is repeatedly become the collection that sends energy or become gain amplifier, superpose by power then; When in liquid, model being detected, can repeatedly become the collection that sends energy or become gain amplifier to a line, superpose by power then.For example the power to strong signal shallow-layer, nearly big gun is light, the weight of deep layer, big gun far away.
After taking above measure to collect data, data are carried out various processing, to obtain real data according to energy distribution curve and gain trace.
Fig. 4 is the electrical block diagram of controllable voltage regulating control module of the present invention.
As directed radiating circuit has the RS232 interface, can exomonental width and amplitude be set by PC.The described controllable voltage regulating control module that is arranged in the signal excitation source comprises pulse-width controlled module, MCU module, circuit for producing high voltage module, on-off circuit and clock and power module;
The pulse-width controlled module: this module is by adopting the accurate counting of CPLD (CPLD) to the 100Mhz high-speed clock source, and control pulsewidth width is that unit is adjustable continuously with the 10ns precision.
MCU (microprocessor unit) module: this module has the RS232 interface that is connected with PC, can receive pulse-width data and amplitude data that PC transmits, and the output control signal is controlled exomonental amplitude and width to high pressure generation module and pulse-width controlled module
Circuit for producing high voltage: produce the continuously adjustable high pressure of voltage.
On-off circuit: by the time width of pulse width control circuit control high pressure output, couplings such as designing circuitry and above-mentioned transmitting transducer frequency and impedance.Clock and power module: needed MCU drive clock of generation system and 100MhzCPLD counting clock.All low-tension supplies that power module provides system to need.
Fig. 5 is the gain control unit synoptic diagram of received signal of the present invention.
This circuit is divided into the two large divisions: analog channel module and digital control module
Analog channel module: mainly form by analogue amplifier and multi-way switch.The signal that prime amplifier Ain sends ultrasonic transducer here among the figure tentatively amplifies, select to give amplifier A1 in the An one with different gain amplifiers by first multi-way switch 1, select to give output amplifier through second multi-way switch 2 then, the signal after will being amplified by output amplifier is again given analog to digital converter.Above-mentioned described amplifier A1 is to the gain amplifier from 1 to 1024 of An; After amplifier chose, the total gain amplifier of amplifying circuit was
Ain gain * Aout gain * (Amplifier Gain that A1 selects in the An)
Digital control module: mainly by control module, latch, can preset counter and some other logic control circuits are formed.Except that control module and 232 interfaces, it is in the field programmable logic chip that other partial circuits can be integrated in a slice FPGA.Control module can be DSP (digital signal processor) or singlechip chip.
The course of work of whole gain control circuit is such: computing machine is given control module with segment delay time, gain number by 232 interfaces, control module at first selects output latch control multi-way switch 1 and 2 to select initial signal gain amplifier by gain, simultaneously with first time delay value and second time delay value give respectively by output latch 1 and output latch 2 and can preset counter 1 and can preset counter 2.In the time of after the system start-up data acquisition, outer sector synchronization pulse is delivered to.This pulse enable counter 1 subtracts counting work, and be 10 nanoseconds * time value time delay, and after arriving time delay, counter 1 sends rz signal.Rz signal has several effects, at first it is squeezed into gain by control module with the yield value of following period and selects output, the device of enabling counting simultaneously 2, by the look-at-me of control module, notify it with next time delay value give counter 1 and next yield value be ready to give the input end of output latch control.So by that analogy, continue next control procedure.After one gatherer process finished, control module was waited for Next Command, to repeat top process.Because sample rate reaches 20M promptly finishes a sampling point in 50 nanoseconds collection, in order to guarantee in 10 nanoseconds, to finish the switching of amplifier gain amplifier, adopt the method that double counters switches to carry out timing controlled, except initial signal gain amplifier value was squeezed into by control module, remaining yield value was all squeezed into by counter simultaneously.
Claims (9)
1. an analog ultrasonic wave earthquake signal physical excitation, receiving system, described system comprises driving source, ultrasonic emitting probe, ultrasound wave receiving transducer, analog to digital converter, amplifier, central signal processing and control element (PCE) and I/O peripheral unit; Described driving source is used for the output HIGH voltage burst pulse and drives ultrasonic signal; Described ultrasonic emitting probe is used for that the high voltage narrow pulse signal is converted to ultrasonic signal and is transmitted to testee; The ultrasonic signal that described ultrasound wave receiving transducer is used for receiving is converted to voltage signal; Described amplifier is used for inputing to after voltage signal that the ultrasound wave receiving transducer is sent amplifies analog to digital converter and becomes and be input to the central signal processing and control element (PCE) after the digital signal and carry out data processing;
It is characterized in that: described system also comprises: be arranged on controllable voltage regulating control module and the gain control unit that is arranged on the received signal of signal receiving end in the signal excitation source; Described controllable voltage regulating control module is used for regulating according to different signal road collection the amplitude size of control output pulse signal; The gain control unit of described received signal is used for that the different reflected signal that receives that enters described amplifier is carried out signal gain to be regulated and sequential control, and the signal after the gain-adjusted is transferred to central signal processing and control module by described analog to digital converter.
2. a kind of analog ultrasonic wave earthquake signal physical excitation according to claim 1, receiving system, it is characterized in that: described ultrasonic emitting probe and ultrasound wave receiving transducer are ultrasonic transducers, are used for launching by the signal after modulus/digital-to-analog conversion or receiving; Described driving source comprises high voltage burst pulse drive signal generator.
3. a kind of analog ultrasonic wave earthquake signal physical excitation according to claim 1, receiving system is characterized in that: the described controllable voltage regulating control module that is arranged in the signal excitation source comprises pulse-width controlled module, MCU module, circuit for producing high voltage module, on-off circuit and clock and power module;
Described pulse-width controlled module adopts the accurate counting of CPLD to high-speed clock source, and control pulsewidth width is that unit is adjustable continuously with the 10ns precision;
The described MCU module that comprises the RS232 interface receives pulse-width data and the amplitude data that the central signal processing and control element (PCE) transmits, and the output control signal is controlled exomonental amplitude and width to circuit for producing high voltage module and pulse-width controlled module;
Described circuit for producing high voltage module is used to produce continuously adjustable high pressure;
Described on-off circuit is used for the time width according to the output of pulse-width controlled module, and control output is with the frequency and the impedance matching of described ultrasonic emitting probe;
Described clock and power module: needed MCU drive clock of generation system and CPLD counting clock; Whole low-tension supplies that power module provides system to need.
4. according to the described a kind of analog ultrasonic wave earthquake signal physical excitation of one of claim 1-3, receiving system, it is characterized in that: the described gain control unit that is arranged on the received signal of signal receiving end comprises: analog channel module and digital control module;
Described analog channel module comprises analogue amplifier group and multi-way switch group; Described received signal is through inputing to multi-way switch earlier behind the ultrasonic transducer after the preliminary amplification of prime amplifier Ain, select in the An one of amplifier A1 that conducting has different gain amplifier usefulness as requested by the first road multi-way switch (1), after select the conducting output amplifier as requested through the second road multi-way switch (2), the signal after will being amplified by output amplifier AOUT is given described analog to digital converter;
Described digital control module comprise the RS232 interface control module, latch, can preset counter and one group of logic control circuit;
When central signal Processing and control module are transferred to control module in the described digital control module with segment delay time, gain number by the RS232 interface, described control module is selected output latch by gain calculating and is controlled the first road multi-way switch (1) and the second road multi-way switch (2) is selected initial signal gain amplifier, described control module of while with first time delay value and second time delay value give first respectively by first output latch (1) and second output latch (2) and can preset counter (1) and second and can preset counter (2).
5. a kind of analog ultrasonic wave earthquake signal physical excitation according to claim 4, receiving system is characterized in that:
Described amplifier A1 is to the gain amplifier ratio from 1 to 1024 of An;
After amplifier chose, the total gain amplifier of amplifying circuit was:
Ain gain * Aout gain * (Amplifier Gain that A1 selects in the An)
Described digital control module can be included in the programmed logic chip except that control module and RS232 interface, and control module is DSP or singlechip chip.
6. carry out analog ultrasonic wave earthquake signal physical excitation and method of reseptance according to the described system of one of claim 1-5, described method comprises that driving source produces step, ultrasonic emitting step, ultrasound wave receiving step, analog to digital conversion step, signal amplification procedure, central signal processing and controlled step and I/O step; Described driving source produces step and is used for output HIGH voltage burst pulse driving ultrasonic signal; Described ultrasonic emitting step is used for that the high voltage narrow pulse signal is converted to ultrasonic signal and is transmitted to testee; The ultrasonic signal that described ultrasound wave receiving step is used for receiving is converted to voltage signal; Input to analog to digital converter after the voltage signal that described signal amplification procedure and analog to digital conversion step are used for that the ultrasound wave receiving step is sent amplifies and become digital signal, be input to the central signal processing and control element (PCE) then and carry out data processing;
It is characterized in that: also comprise in the described method: the gain control step that in described incentive step, also comprises controllable voltage regulating controlled step and the received signal before described ultrasound wave receiving step; Described controllable voltage regulating controlled step is used for regulating according to different signal road collection the energy of control output pulse signal; The gain control step of described received signal is used for the different reflected signals that receive that enter described amplifier are carried out that signal gain is regulated and sequential control, and the signal after the gain-adjusted is transferred to by described analog to digital conversion step that central signal is handled and controlled step in carry out data processing.
7. a kind of analog ultrasonic wave earthquake signal physical excitation according to claim 6 and method of reseptance is characterized in that:
Described controllable voltage regulating controlled step comprises pulse-width controlled process, MCU control procedure, high pressure production process, switch control procedure and clock and power control procedure;
Described pulse-width controlled process adopts the accurate counting of CPLD to high-speed clock source, and control pulsewidth width is that unit is adjustable continuously with the 10ns precision;
In the described MCU control procedure, receive pulse-width data and the amplitude data that central signal is handled and controlled step transmits, and the output control signal is controlled exomonental amplitude and width to high pressure production process and pulse-width controlled process by described RS232 interface;
Described high pressure produces control procedure and is used to produce continuously adjustable high pressure;
Described switch control procedure is used for the time width through the output of pulse-width controlled process, and control output is with the frequency and the impedance matching of described ultrasonic emitting probe;
Described clock control process is used for needed MCU drive clock of generation system and CPLD counting clock; Whole low-tension supplies that power control procedure provides system to need.
8. according to claim 6 or 7 described a kind of analog ultrasonic wave earthquake signal physical excitation and method of reseptances, it is characterized in that:
The gain control step of described received signal comprises: analog channel process and digital control process;
Adopt analogue amplifier group and multi-way switch group in the described analog channel process; Described received signal is through inputing to multi-way switch earlier behind the ultrasonic transducer after the preliminary amplification of prime amplifier Ain, select in the An one of amplifier A1 that conducting has different gain amplifier usefulness as requested by the first road multi-way switch (1), after select the conducting output amplifier as requested through the second road multi-way switch (2), the signal after will being amplified by output amplifier is given described analog to digital converter;
Use in the described digital control process RS232 interface control module, latch, can preset counter and one group of logic control circuit;
Handle and controlled step is transferred to control module in the described digital control process with segment delay time, the number that gains by RS 232 interfaces according to central signal, described control module is selected output latch by gain calculating and is controlled the first road multi-way switch (1) and the second road multi-way switch (2) is selected initial signal gain amplifier, described control module of while with first time delay value and second time delay value give first respectively by first output latch (1) and second output latch (2) and can preset counter (1) and second and can preset counter (2).
9. a kind of analog ultrasonic wave earthquake signal physical excitation according to claim 8 and method of reseptance is characterized in that: described amplifier A1 is to the gain amplifier ratio from 1 to 1024 of An;
After amplifier chose, the total gain amplifier of amplifying circuit was:
Ain gain * Aout gain * (Amplifier Gain that A1 selects in the An)
Described control module is DSP or singlechip chip.
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| CN102819035B (en) * | 2011-06-09 | 2015-02-11 | 中国石油化工股份有限公司 | Non-contact ultrasonic testing method |
| CN104656143A (en) * | 2015-03-18 | 2015-05-27 | 成都科特柯本科技有限公司 | Experimental device for simulating microseismic monitoring fracturing effect and experimental method for experimental device |
| CN106556859B (en) * | 2015-09-29 | 2019-06-04 | 中国石油化工股份有限公司 | A kind of ultrasonic signal excitation reception test method |
| CN106556858B (en) * | 2015-09-29 | 2019-06-04 | 中国石油化工股份有限公司 | A kind of ultrasonic signal excitation reception test macro |
| CN105785435B (en) * | 2016-03-29 | 2018-08-03 | 中国石油天然气集团公司 | Seismic physical model experimental system and its analog data acquisition method and apparatus |
| CN106508882B (en) * | 2016-10-29 | 2019-07-30 | 深圳市沃特沃德股份有限公司 | For driving ultrasonic wave conversion equipment to play method, terminal and the system of ultrasonic wave |
| CN108061597B (en) * | 2016-11-07 | 2021-03-19 | 中国石油化工股份有限公司 | Seismic model velocity detection system |
| CN109632024B (en) * | 2018-12-17 | 2020-10-16 | 杭州晶锐仪器仪表有限公司 | Ultrasonic control method combining amplitude and pulse width modulation |
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