CN102969996B - 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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- CN102969996B CN102969996B CN201210459078.0A CN201210459078A CN102969996B CN 102969996 B CN102969996 B CN 102969996B CN 201210459078 A CN201210459078 A CN 201210459078A CN 102969996 B CN102969996 B CN 102969996B
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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
General pulse send-receive formula ultrasound measuring instrument is of many uses, and usual frequency of utilization is between 1MHz-15MHz, and the occasion higher to ask for something, this frequency range cannot meet testing requirement.Such as, non-linear ultrasonic Dynamic Non-Destruction Measurement, it can find the material damage that linear ultrasonic cannot detect and defect, as tired, stress is concentrated, weak binding etc., this new detection technique requires that instrument not only has outside stronger transmitting power, special requirement have wide band reception amplifying power, to obtain the information such as high order harmonic component.But so far, in view of electronic technology present situation, be difficult to the analog signal frequency band only solving so wide (such as from 100k to 50MHz) with an amplifier, therefore existing instrument cannot meet these requirements because of the amplifier of Jin You mono-tunnel serial.
Summary of the invention
The object of the invention is to the deficiency overcoming prior art, design a kind of implementation method and device of non-linear ultrasonic detector analog amplify circuit, under existing Analog Electronics Technique condition, frequency-division section is adopted to receive and carry out the method for hardware compensating, make up 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: the implementation method of non-linear ultrasonic detector analog amplify circuit and device, comprise AWG (Arbitrary Waveform Generator), variable power amplifier, broad-band ultrasonic transducer, two groups of multi-channel switches, at least two band-pass filter amplifiers, at least one A/D converter and FPGA signal integration processing unit, microprocessing systems, displays, it is characterized in that: containing high frequency compensation in described band-pass filter amplifier, for compensating analog hardware reception circuit and the intrinsic high frequency attenuation of broad-band ultrasonic transducer; Described multi-channel switch is placed in the front and back end of band-pass filter amplifier, and the channel switch quantity often organized in 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 at least divides secondary excitation to produce pumping signal;
B. pumping signal encourages broad-band ultrasonic transducer after variable power amplifier amplifies, and described variable power amplifier multiplication factor is by microprocessing systems regulating and controlling;
C. broad-band ultrasonic transducer launches ultrasonic signal to examined workpiece, receives the ultrasonic signal that examined workpiece reflects simultaneously;
D. between required low frequency to highest frequency, at least two frequency ranges are divided into, correspondence at least two band-pass filter amplifiers, microprocessing systems opens at least two band-pass filter amplifiers successively by the multi-channel switch of control cincture bandpass filter amplifier front end, the ultrasonic signal that the broad-band ultrasonic sensor transmissions that at least two band-pass filter amplifiers receive respective frequency range is successively come, simultaneously filtering interfering clutter, the high frequency compensation compensating analog hardware reception circuit in band-pass filter amplifier and the intrinsic high frequency attenuation of broad-band ultrasonic transducer;
E. the multi-channel switch of microprocessing systems control band-pass filter amplifier rear end, the ultrasound signal transmission of the corresponding band received by respective belt bandpass filter amplifier is to A/D converter and FPGA signal integration processing unit;
F.A/D transducer and FPGA signal integration processing unit are changed successively and gather the data in the ultrasonic signal of corresponding band;
G. at least divide the data of secondary acquisition finally by microprocessing systems weighting process by A/D converter and FPGA signal integration processing unit, be integrated into the signal of required Whole frequency band, and show the signal after integrating in the display.
Said method can possess the integrality of the ultrasonic signal received from low frequency to intermediate frequency to high frequency to greatest extent, reaches nonlinear ultrasonic and detects reception requirement to instrument Simulation scale-up hardware circuit.
Further, the A/D converter that quantity is identical with band-pass filter amplifier and FPGA signal integration processing unit can be adopted in described device; In described implementation method, in step a, microprocessing systems controls arbitrary waveform signal generator and once excites generation pumping signal; In steps d, microprocessing systems opens at least two band-pass filter amplifiers by the multi-channel switch of control cincture bandpass filter amplifier front end simultaneously, and at least two band-pass filter amplifiers receive the ultrasonic signal of respective frequency range simultaneously; In step e, microprocessing systems opens the quantity A/D converter identical with band-pass filter amplifier and FPGA signal integration processing unit by the multi-channel switch of control cincture bandpass filter amplifier rear end simultaneously, and the ultrasonic signal of the corresponding band that at least two band-pass filter amplifiers receive directly transfers to A/D converter corresponding thereto and FPGA signal integration processing unit; In step f, the A/D converter that quantity is identical with band-pass filter amplifier and FPGA signal integration processing unit are changed and gather the data in the ultrasonic signal of corresponding band separately simultaneously; In step g, the A/D converter that quantity is identical with band-pass filter amplifier and the data that FPGA signal integration processing unit gathers separately are finally by microprocessing systems weighting process, be integrated into the signal of required Whole frequency band, and show the signal after integrating in the display.
The invention has the beneficial effects as follows the implementation method and device that design a kind of non-linear ultrasonic detector analog amplify circuit, under existing Analog Electronics Technique condition, adopt repeatedly or single-shot, frequency-division section receive and sample and carry out the method for hardware compensating, finally centralized integration process, make up the deficiency of existing instrument, obtain the ultrabroad band amplifying power of required Ultrasound Instrument, meet every hardware requirement of non-linear ultrasonic Dynamic Non-Destruction Measurement, the development of non-linear ultrasonic detection technique will be promoted further.
Below in conjunction with embodiment, the present invention is described in further detail, but the implementation method of non-linear ultrasonic detector analog amplify circuit of the present invention and device are not limited to embodiment.
Accompanying drawing explanation
Below in conjunction with drawings and Examples, the present invention is further described.
Fig. 1 is the principle of device block diagram of first embodiment of the invention.
Fig. 2 is the amplifier frequency response curve integrated by weighting process of first embodiment of the invention and the contrast schematic diagram of ideal amplifier frequency response curve.
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.
In figure, 1.. AWG (Arbitrary Waveform Generator), 2.. variable power amplifier, 3.. broad-band ultrasonic transducer, 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). the amplifier frequency response curve integrated by weighting process.
Embodiment
In the first embodiment shown in Fig. 1, Fig. 2, the implementation method of non-linear ultrasonic detector analog amplify circuit and device, described device comprises AWG (Arbitrary Waveform Generator) (1.), variable power amplifier (2.), broad-band ultrasonic transducer (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.), displays (8.); Containing high frequency compensation in described band-pass filter amplifier (5.); Described multi-channel switch (4.) is placed in the front and back end of two band-pass filter amplifiers (BW), the channel switch quantity often organized in 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.) controls arbitrary waveform signal generator (1.) point secondary excitation and produces pumping signal;
B. pumping signal excitation broad-band ultrasonic transducer (3.) after variable power amplifier (2.) amplifies, described variable power amplifier (2.) multiplication factor is by microprocessing systems (7.) regulating and controlling;
C. broad-band ultrasonic transducer (3.) launches ultrasonic signal to examined workpiece, receives the ultrasonic signal that examined workpiece reflects simultaneously;
D. between required low frequency to highest frequency, two frequency ranges are divided into, corresponding two band-pass filter amplifiers (5.), microprocessing systems (7.) opens two band-pass filter amplifiers (5.) successively by the multi-channel switch (4.) of control cincture bandpass filter amplifier (5.) front end, the ultrasonic signal that the broad-band ultrasonic transducer (3.) that two band-pass filter amplifiers (5.) receive respective frequency range successively transmits, filtering interfering clutter simultaneously, high frequency compensation compensating analog hardware reception circuit in band-pass filter amplifier (5.) and the intrinsic high frequency attenuation of broad-band ultrasonic transducer (3.),
E. the ultrasound signal transmission of corresponding band that received by respective belt bandpass filter amplifier (5.) of the multi-channel switch (4.) of microprocessing systems (7.) control cincture bandpass filter amplifier (5.) rear end is to A/D converter and FPGA signal integration processing unit (6.);
F.A/D transducer and FPGA signal integration processing unit (6.) are changed successively and gather the data in the ultrasonic signal of corresponding band;
G. by the data of A/D converter and FPGA signal integration processing unit (6.) secondary acquisition finally by microprocessing systems (7.) weighting process, be integrated into the signal of required Whole frequency band, and in display (8.) display integrate after signal.In fig. 2, the frequency response curve (a) of amplifier frequency response curve (b) integrated by weighting process of the present invention closely ideal amplifier.
In the second embodiment shown in Fig. 3, the difference of the present invention and the first embodiment is: further, quantity can be adopted in described device more than the band-pass filter amplifier (5.) of two, between required low frequency to highest frequency, be divided into the multiple frequency ranges corresponding with band-pass filter amplifier (5.) quantity.
In the 3rd embodiment shown in Fig. 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 described device; In described implementation method, in step a, microprocessing systems (7.) controls arbitrary waveform signal generator (1.) and once excites generation pumping signal; In steps d, microprocessing systems (7.) opens two band-pass filter amplifiers (5.) by the multi-channel switch (4.) of control cincture bandpass filter amplifier (5.) front end simultaneously, and two band-pass filter amplifiers (5.) receive the ultrasonic signal of respective frequency range simultaneously; In step e, microprocessing systems (7.) opens two A/D converters and FPGA signal integration processing unit (6.) by the multi-channel switch (4.) of control cincture bandpass filter amplifier (5.) rear end simultaneously, and the ultrasonic signal of the corresponding band that two band-pass filter amplifiers (5.) receive directly transfers to two corresponding A/D converters and FPGA signal integration processing unit (6.); In step f, two A/D converters and FPGA signal integration processing unit (6.) are changed and gather the data in the ultrasonic signal of corresponding band separately simultaneously; In step g, the data that two A/D converters and FPGA signal integration processing unit (6.) gather separately, finally by microprocessing systems (7.) weighting process, are integrated into the signal of required Whole frequency band, and the signal in display (8.) after display integration.
In the 4th embodiment shown in Fig. 5, the difference of the present invention and the 3rd embodiment is: further, quantity can be adopted more than the band-pass filter amplifier (5.) of two and quantity more than the A/D converter of two and FPGA signal integration processing unit (6.) in described device, be divided into the multiple frequency ranges corresponding with band-pass filter amplifier (5.) quantity between required low frequency to 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 is only used for further illustrating 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 above embodiment is done according to technical spirit of the present invention any simple modification, equivalent variations and modification, all fall in the protection range of technical solution of the present invention.
Claims (2)
1. the implementation method of non-linear ultrasonic detector analog amplify circuit, described analog amplify circuit comprises AWG (Arbitrary Waveform Generator), variable power amplifier, broad-band ultrasonic transducer, two groups of multi-channel switches, at least two band-pass filter amplifiers, at least one A/D converter and FPGA signal integration processing unit, microprocessing systems, displays, it is characterized in that: containing high frequency compensation in described band-pass filter amplifier; Described multi-channel switch is placed in the front and back end of band-pass filter amplifier, and the channel switch quantity often organized in 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 at least divides secondary excitation to produce pumping signal;
B. pumping signal encourages broad-band ultrasonic transducer after variable power amplifier amplifies, and described variable power amplifier multiplication factor is by microprocessing systems regulating and controlling;
C. broad-band ultrasonic transducer launches ultrasonic signal to examined workpiece, receives the ultrasonic signal that examined workpiece reflects simultaneously;
D. between required low frequency to highest frequency, at least two frequency ranges are divided into, correspondence at least two band-pass filter amplifiers, microprocessing systems opens at least two band-pass filter amplifiers successively by the multi-channel switch of control cincture bandpass filter amplifier front end, the ultrasonic signal that the broad-band ultrasonic sensor transmissions that at least two band-pass filter amplifiers receive respective frequency range is successively come, simultaneously filtering interfering clutter, the high frequency compensation compensating analog hardware reception circuit in band-pass filter amplifier and the intrinsic high frequency attenuation of broad-band ultrasonic transducer;
E. the multi-channel switch of microprocessing systems control band-pass filter amplifier rear end, the ultrasound signal transmission of the corresponding band received by respective belt bandpass filter amplifier is to A/D converter and FPGA signal integration processing unit;
F.A/D transducer and FPGA signal integration processing unit are changed successively and gather the data in the ultrasonic signal of corresponding band;
G. at least divide the data of secondary acquisition finally by microprocessing systems weighting process by A/D converter and FPGA signal integration processing unit, be integrated into the signal of required Whole frequency band, and show the signal after integrating in the display.
2. the implementation method of non-linear ultrasonic detector analog amplify circuit according to claim 1, it is characterized in that: further, the A/D converter that quantity is identical with band-pass filter amplifier and FPGA signal integration processing unit in described analog amplify circuit, can be adopted; In described implementation method, in step a, microprocessing systems controls arbitrary waveform signal generator and once excites generation pumping signal; In steps d, microprocessing systems opens at least two band-pass filter amplifiers by the multi-channel switch of control cincture bandpass filter amplifier front end simultaneously, and at least two band-pass filter amplifiers receive the ultrasonic signal of respective frequency range simultaneously; In step e, microprocessing systems opens the quantity A/D converter identical with band-pass filter amplifier and FPGA signal integration processing unit by the multi-channel switch of control cincture bandpass filter amplifier rear end simultaneously, and the ultrasonic signal of the corresponding band that at least two band-pass filter amplifiers receive directly transfers to A/D converter corresponding thereto and FPGA signal integration processing unit; In step f, the A/D converter that quantity is identical with band-pass filter amplifier and FPGA signal integration processing unit are changed and gather the data in the ultrasonic signal of corresponding band separately simultaneously; In step g, the A/D converter that quantity is identical with band-pass filter amplifier and the data that FPGA signal integration processing unit gathers separately are finally by microprocessing systems weighting process, be integrated into the signal of required Whole frequency band, and show the signal after integrating in the display.
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| CN104022745B (en) * | 2014-06-03 | 2017-01-25 | 成都嘉晨科技有限公司 | ultra-wideband high-power power amplifier device |
| 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 |
| CN105978676B (en) * | 2016-06-30 | 2019-05-17 | 维沃移动通信有限公司 | A kind of method and mobile terminal of the transmission of frequency band data |
| 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 |
| CN113933391B (en) * | 2021-10-13 | 2023-05-16 | 山东大学 | Piezoelectric ultrasonic guided wave detection device and detection method |
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