CN102969996A - Realization method of nonlinear ultrasonic test instrument analog amplifying circuit and realization device thereof - Google Patents
Realization method of nonlinear ultrasonic test instrument analog amplifying circuit and realization device thereof Download PDFInfo
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- CN102969996A CN102969996A CN2012104590780A CN201210459078A CN102969996A CN 102969996 A CN102969996 A CN 102969996A CN 2012104590780 A CN2012104590780 A CN 2012104590780A CN 201210459078 A CN201210459078 A CN 201210459078A CN 102969996 A CN102969996 A CN 102969996A
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Abstract
The invention discloses a realization method of a nonlinear ultrasonic test instrument analog amplifying circuit and a realization device of the nonlinear ultrasonic test instrument analog amplifying circuit. The device comprises an arbitrary waveform generator, a variable power amplifier, a broadband ultrasonic sensor, two sets of multi-channel switches, at least two band-pass filter amplifiers, at least one A/D (analog to digital) convertor, an FPGA (field programmable gata array) signal integration processing unit, a microprocessing system and a displayer. The adopted method comprises the following steps of: stimulating and receiving samples at different frequency ranges repeatedly or for once, carrying out hardware compensation, and carrying out integration processing in a concentrated way. The disadvantages of the existing instrument can be overcome, the required ultra-broadband amplifying power of the ultrasonic instrument can be obtained, and each hardware requirement of a nonlinear ultrasonic nondestructive testing technology can be met.
Description
Technical field
The present invention relates to a kind of implementation method and device of Dynamic Non-Destruction Measurement, particularly relate to a kind of implementation method and device of non-linear ultrasonic detector analog amplify circuit.
Background technology
It is conventional that impulse ejection-the receiving type ultrasound measuring instrument is of many uses, usually frequency of utilization between 1MHz-15MHz, the occasion higher to ask for something, this frequency range can't satisfy testing requirement.For example, the non-linear ultrasonic Dynamic Non-Destruction Measurement, it can find material damage and the defective that linear ultrasonic can't detect, as tired, stress is concentrated, weak combination etc., this new detection technique requires instrument not only to have outside the stronger transmitting power, special requirement have wide band reception amplifying power, with information such as acquisition high order harmonic components.But so far, in view of the electronic technology present situation, be difficult to only solve with an amplifier analog signal frequency band of so wide (for example from 100k to 50MHz), so existing instrument can't satisfy these requirements because of the amplifier that one tunnel serial is only arranged.
Summary of the invention
The object of the invention is to overcome the deficiency of prior art, design a kind of implementation method and device of non-linear ultrasonic detector analog amplify circuit, under existing Analog Electronics Technique condition, adopt frequency-division section to receive and carry out the method for hardware compensating, remedy the deficiency of existing instrument, obtain the ultrabroad band amplifying power of required Ultrasound Instrument.
The technical solution adopted for the present invention to solve the technical problems is: implementation method and the device of non-linear ultrasonic detector analog amplify circuit, comprise AWG (Arbitrary Waveform Generator), variable power amplifier, wideband sonac, two groups of multi-channel switches, at least two band-pass filter amplifiers, at least one A/D converter and FPGA signal integration processing units, microprocessing systems, display, it is characterized in that: contain high frequency compensation in the described band-pass filter amplifier, be used for compensating analog hardware receiving circuit and the intrinsic high frequency attenuation of wideband sonac; Described multi-channel switch places the front and back end of band-pass filter amplifier, and the channel switch quantity in every group of multi-channel switch is identical with the quantity of band-pass filter amplifier, and respectively there is a channel switch front and back end of each band-pass filter amplifier; Described implementation method is,
A. microprocessing systems control arbitrary waveform signal generator divides secondary excitation to produce pumping signal at least;
B. pumping signal encourages the wideband sonac after variable power amplifier amplifies, and described variable power amplifier multiplication factor is by the microprocessing systems regulating and controlling;
C. the wideband sonac receives the ultrasonic signal that tested workpiece reflects simultaneously to tested workpiece emission ultrasonic signal;
D. at required low frequency to being divided at least two frequency ranges between the highest frequency, at least two band-pass filter amplifiers of correspondence, microprocessing systems is opened at least two band-pass filter amplifiers successively by the multi-channel switch of control band-pass filter amplifier front end, at least two band-pass filter amplifiers receive the ultrasonic signal that the wideband sonac of frequency range separately transmits successively, while filtering interfering clutter, the high frequency compensation compensating analog hardware receiving circuit in the band-pass filter amplifier and the intrinsic high frequency attenuation of wideband sonac;
E. the multi-channel switch of microprocessing systems control band-pass filter amplifier rear end, the ultrasound signal transmission of the corresponding band that corresponding band-pass filter amplifier is received is to A/D converter and FPGA signal integration processing unit;
The data in the ultrasonic signal of corresponding band are changed and gathered to f.A/D transducer and FPGA signal integration processing unit successively;
G. divide at least the data of secondary acquisition to process by the microprocessing systems weighting at last by A/D converter and FPGA signal integration processing unit, be integrated into the signal of required Whole frequency band, and in display, show the signal after integrating.
Said method can be possessed to greatest extent from low frequency to intermediate frequency the integrality of the ultrasonic signal that receives to high frequency, reaches nonlinear ultrasonic and detects the reception requirement that hardware circuit is amplified in simulation to instrument.
Further, can adopt the quantity A/D converter identical with band-pass filter amplifier and FPGA signal integration processing unit in the described device; In the described implementation method, in step a, microprocessing systems control arbitrary waveform signal generator once excites the generation pumping signal; In steps d, microprocessing systems is opened at least two band-pass filter amplifiers simultaneously by the multi-channel switch of control band-pass filter amplifier front end, and at least two band-pass filter amplifiers receive the separately ultrasonic signal of frequency range simultaneously; In step e, microprocessing systems is opened the quantity A/D converter identical with band-pass filter amplifier and FPGA signal integration processing unit simultaneously by the multi-channel switch of control band-pass filter amplifier rear end, and the ultrasonic signal of the corresponding band of at least two band-pass filter amplifier receptions directly transfers to the A/D converter corresponding with it and FPGA signal integration processing unit; In step f, the data in the ultrasonic signal of corresponding band are changed and gather simultaneously to the A/D converter that quantity is identical with band-pass filter amplifier and FPGA signal integration processing unit separately; In step g, the data that the A/D converter that quantity is identical with band-pass filter amplifier and FPGA signal integration processing unit gather are separately processed by the microprocessing systems weighting at last, be integrated into the signal of required Whole frequency band, and in display, show the signal after integrating.
The invention has the beneficial effects as follows implementation method and the device of a kind of non-linear ultrasonic detector analog amplify circuit of design, under existing Analog Electronics Technique condition, adopt repeatedly or single-shot, frequency-division section receive sampling and carry out the method that hardware compensating, last centralized integration are processed, remedy the deficiency of existing instrument, obtain the ultrabroad band amplifying power of required Ultrasound Instrument, satisfy every hardware requirement of non-linear ultrasonic Dynamic Non-Destruction Measurement, will further promote the development of non-linear ultrasonic detection technique.
Below in conjunction with embodiment the present invention is described in further detail, but implementation method and the device of non-linear ultrasonic detector analog amplify circuit of the present invention are not limited to embodiment.
Description of drawings
The present invention is further described below in conjunction with drawings and Examples.
Fig. 1 is the principle of device block diagram of first embodiment of the invention.
Fig. 2 is that the amplifier frequency response curve of integration and the contrast schematic diagram of ideal amplifier frequency response curve are processed in the weighting of passing through of first embodiment of the invention.
Fig. 3 is the principle of device block diagram of second embodiment of the invention.
Fig. 4 is the principle of device block diagram of third embodiment of the invention.
Fig. 5 is the principle of device block diagram of fourth embodiment of the invention.
Among the figure, 1.. AWG (Arbitrary Waveform Generator), 2.. variable power amplifier, 3.. the wideband sonac, 4.. multi-channel switch, 5. 1～5. n. band-pass filter amplifier, 6. 1～6. n. A/D converter and FPGA signal integration processing unit, 7.. microprocessing systems, 8.. display, (a). the frequency response curve of ideal amplifier, (b). process the amplifier frequency response curve of integrating by weighting.
Embodiment
Among Fig. 1, the first embodiment shown in Figure 2, implementation method and the device of non-linear ultrasonic detector analog amplify circuit, described device comprise AWG (Arbitrary Waveform Generator) (1.), variable power amplifier (2.), wideband sonac (3.), two groups of multi-channel switches (4.), two band-pass filter amplifiers (5.), A/D converter and FPGA signal integration processing unit (6.), microprocessing systems (7.), display (8.); Contain high frequency compensation in the described band-pass filter amplifier (5.); Described multi-channel switch (4.) places the front and back end of two band-pass filter amplifiers (BW), channel switch quantity in every group of multi-channel switch (4.) is identical with the quantity of band-pass filter amplifier (5.), and respectively there is a channel switch front and back end of each band-pass filter amplifier (5.); Described implementation method is,
A. microprocessing systems (7.) control arbitrary waveform signal generator (1.) minute secondary excitation produces pumping signal;
B. pumping signal encourages wideband sonac (3.) after variable power amplifier (2.) amplifies, and described variable power amplifier (2.) multiplication factor is by microprocessing systems (7.) regulating and controlling;
C. wideband sonac (3.) receives the ultrasonic signal that tested workpiece reflects simultaneously to tested workpiece emission ultrasonic signal;
D. at required low frequency to being divided into two frequency ranges between the highest frequency, corresponding two band-pass filter amplifiers (5.), microprocessing systems (7.) is opened two band-pass filter amplifiers (5.) successively by the multi-channel switch (4.) of control band-pass filter amplifier (5.) front end, two band-pass filter amplifiers (5.) receive the ultrasonic signal that the wideband sonac (3.) of frequency range separately transmits successively, while filtering interfering clutter, the high frequency compensation compensating analog hardware receiving circuit in the band-pass filter amplifier (5.) and the intrinsic high frequency attenuation of wideband sonac (3.);
E. the ultrasound signal transmission of the multi-channel switch (4.) of microprocessing systems (7.) control band-pass filter amplifier (5.) rear end corresponding band that corresponding band-pass filter amplifier (5.) is received is to A/D converter and FPGA signal integration processing unit (6.);
The data in the ultrasonic signal of corresponding band are changed and gathered to f.A/D transducer and FPGA signal integration processing unit (6.) successively;
G. processed by microprocessing systems (7.) weighting at last by the data of A/D converter and FPGA signal integration processing unit (6.) secondary acquisition, be integrated into the signal of required Whole frequency band, and in display (8.), show the signal after integrating.In Fig. 2, the amplifier frequency response curve (b) of process integrating by weighting of the present invention is very near the frequency response curve (a) of ideal amplifier.
In the second embodiment shown in Figure 3, the difference of the present invention and the first embodiment is: further, can adopt quantity more than two band-pass filter amplifier (5.) in the described device, required low frequency is to being divided into a plurality of frequency ranges corresponding with band-pass filter amplifier (5.) quantity between the highest frequency.
In the 3rd embodiment shown in Figure 4, the difference of the present invention and the first embodiment is: further, can adopt two A/D converters and FPGA signal integration processing unit (6.) in the described device; In the described implementation method, in step a, microprocessing systems (7.) control arbitrary waveform signal generator (1.) once excites the generation pumping signal; In steps d, microprocessing systems (7.) is opened two band-pass filter amplifiers (5.) simultaneously by the multi-channel switch (4.) of control band-pass filter amplifier (5.) front end, and two band-pass filter amplifiers (5.) receive the separately ultrasonic signal of frequency range simultaneously; In step e, microprocessing systems (7.) is opened two A/D converters and FPGA signal integration processing unit (6.) simultaneously by the multi-channel switch (4.) of control band-pass filter amplifier (5.) rear end, and the ultrasonic signal of the corresponding band that two band-pass filter amplifiers (5.) receive directly transfers to corresponding two A/D converters and FPGA signal integration processing unit (6.); In step f, the data in the ultrasonic signal of corresponding band are changed and gather simultaneously to two A/D converters and FPGA signal integration processing unit (6.) separately; In step g, the data that two A/D converters and FPGA signal integration processing unit (6.) gather are separately processed by microprocessing systems (7.) weighting at last, are integrated into the signal of required Whole frequency band, and show the signal after the integration in display (8.).
In the 4th embodiment shown in Figure 5, the difference of the present invention and the 3rd embodiment is: further, can adopt quantity more than two band-pass filter amplifier (5.) and quantity A/D converter and the FPGA signal integration processing unit (6.) more than two in the described device, required low frequency is to being divided into a plurality of frequency ranges corresponding with band-pass filter amplifier (5.) quantity between the highest frequency, band-pass filter amplifier (5.) is identical with the quantity of A/D converter and FPGA signal integration processing unit (6.).
Above-described embodiment only is used for further specifying implementation method and the device of non-linear ultrasonic detector analog amplify circuit of the present invention; but invention is not limited to embodiment; every foundation technical spirit of the present invention all falls in the protection range of technical solution of the present invention any simple modification, equivalent variations and modification that above embodiment does.
Claims (2)
1. the implementation method of non-linear ultrasonic detector analog amplify circuit and device, comprise AWG (Arbitrary Waveform Generator), variable power amplifier, wideband sonac, two groups of multi-channel switches, at least two band-pass filter amplifiers, at least one A/D converter and FPGA signal integration processing units, microprocessing systems, display, it is characterized in that: contain high frequency compensation in the described band-pass filter amplifier; Described multi-channel switch places the front and back end of band-pass filter amplifier, and the channel switch quantity in every group of multi-channel switch is identical with the quantity of band-pass filter amplifier, and respectively there is a channel switch front and back end of each band-pass filter amplifier; Described implementation method is,
A. microprocessing systems control arbitrary waveform signal generator divides secondary excitation to produce pumping signal at least;
B. pumping signal encourages the wideband sonac after variable power amplifier amplifies, and described variable power amplifier multiplication factor is by the microprocessing systems regulating and controlling;
C. the wideband sonac receives the ultrasonic signal that tested workpiece reflects simultaneously to tested workpiece emission ultrasonic signal;
D. at required low frequency to being divided at least two frequency ranges between the highest frequency, at least two band-pass filter amplifiers of correspondence, microprocessing systems is opened at least two band-pass filter amplifiers successively by the multi-channel switch of control band-pass filter amplifier front end, at least two band-pass filter amplifiers receive the ultrasonic signal that the wideband sonac of frequency range separately transmits successively, while filtering interfering clutter, the high frequency compensation compensating analog hardware receiving circuit in the band-pass filter amplifier and the intrinsic high frequency attenuation of wideband sonac;
E. the multi-channel switch of microprocessing systems control band-pass filter amplifier rear end, the ultrasound signal transmission of the corresponding band that corresponding band-pass filter amplifier is received is to A/D converter and FPGA signal integration processing unit;
The data in the ultrasonic signal of corresponding band are changed and gathered to f.A/D transducer and FPGA signal integration processing unit successively;
G. divide at least the data of secondary acquisition to process by the microprocessing systems weighting at last by A/D converter and FPGA signal integration processing unit, be integrated into the signal of required Whole frequency band, and in display, show the signal after integrating.
2. implementation method and the device of non-linear ultrasonic detector analog amplify circuit according to claim 1, it is characterized in that: further, can adopt the quantity A/D converter identical with band-pass filter amplifier and FPGA signal integration processing unit in the described device; In the described implementation method, in step a, microprocessing systems control arbitrary waveform signal generator once excites the generation pumping signal; In steps d, microprocessing systems is opened at least two band-pass filter amplifiers simultaneously by the multi-channel switch of control band-pass filter amplifier front end, and at least two band-pass filter amplifiers receive the separately ultrasonic signal of frequency range simultaneously; In step e, microprocessing systems is opened the quantity A/D converter identical with band-pass filter amplifier and FPGA signal integration processing unit simultaneously by the multi-channel switch of control band-pass filter amplifier rear end, and the ultrasonic signal of the corresponding band of at least two band-pass filter amplifier receptions directly transfers to the A/D converter corresponding with it and FPGA signal integration processing unit; In step f, the data in the ultrasonic signal of corresponding band are changed and gather simultaneously to the A/D converter that quantity is identical with band-pass filter amplifier and FPGA signal integration processing unit separately; In step g, the data that the A/D converter that quantity is identical with band-pass filter amplifier and FPGA signal integration processing unit gather are separately processed by the microprocessing systems weighting at last, be integrated into the signal of required Whole frequency band, and in display, show the signal after integrating.
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| CN105241963A (en) * | 2015-09-07 | 2016-01-13 | 中国特种设备检测研究院 | Power amplification device of nonlinear electromagnetic ultrasound exciting signal |
| CN105978676A (en) * | 2016-06-30 | 2016-09-28 | 维沃移动通信有限公司 | Frequency band data transmission method and mobile terminal |
| CN106896160A (en) * | 2015-12-17 | 2017-06-27 | 中国石油天然气股份有限公司 | Signal excitation circuit of pipeline anticorrosive coating joint coating bonding quality detector |
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| CN110865124A (en) * | 2019-11-27 | 2020-03-06 | 华东理工大学 | Nonlinear ultrasonic guided wave detection system and method based on linear power amplifier |
| CN113933391A (en) * | 2021-10-13 | 2022-01-14 | 山东大学 | Piezoelectric ultrasonic guided wave detection device and detection method |
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Cited By (10)
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| CN104022745A (en) * | 2014-06-03 | 2014-09-03 | 成都嘉晨科技有限公司 | Ultra-wideband high-power power amplifier device |
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| CN105241963B (en) * | 2015-09-07 | 2018-05-01 | 中国特种设备检测研究院 | The power amplifier device of nonlinear electromagnetic ultrasonic excitation signal |
| CN106896160A (en) * | 2015-12-17 | 2017-06-27 | 中国石油天然气股份有限公司 | Signal excitation circuit of pipeline anticorrosive coating joint coating bonding quality detector |
| CN106896161A (en) * | 2015-12-17 | 2017-06-27 | 中国石油天然气股份有限公司 | Signal receiving and processing circuit of pipeline anticorrosive coating joint coating bonding quality detector |
| CN105978676A (en) * | 2016-06-30 | 2016-09-28 | 维沃移动通信有限公司 | Frequency band data transmission method and mobile terminal |
| CN110865124A (en) * | 2019-11-27 | 2020-03-06 | 华东理工大学 | Nonlinear ultrasonic guided wave detection system and method based on linear power amplifier |
| CN110865124B (en) * | 2019-11-27 | 2022-09-27 | 华东理工大学 | Nonlinear ultrasonic guided wave detection system and method based on linear power amplifier |
| CN113933391A (en) * | 2021-10-13 | 2022-01-14 | 山东大学 | Piezoelectric ultrasonic guided wave detection device and detection method |
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