CN102565200A - Arbitrary waveform excitation board card for exciting piezoelectric transducer array to generate ultrasonic guided waves - Google Patents
Arbitrary waveform excitation board card for exciting piezoelectric transducer array to generate ultrasonic guided waves Download PDFInfo
- Publication number
- CN102565200A CN102565200A CN201210034063XA CN201210034063A CN102565200A CN 102565200 A CN102565200 A CN 102565200A CN 201210034063X A CN201210034063X A CN 201210034063XA CN 201210034063 A CN201210034063 A CN 201210034063A CN 102565200 A CN102565200 A CN 102565200A
- Authority
- CN
- China
- Prior art keywords
- waveform
- inductance
- pin
- capacitor
- resistance
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Landscapes
- Amplifiers (AREA)
Abstract
The invention discloses an arbitrary waveform excitation board card for exciting a piezoelectric transducer array to generate ultrasonic guided waves, and belongs to the field of nondestructive detection. The arbitrary waveform excitation board card is used for exciting the piezoelectric transducer array to generate the ultrasonic guided waves. The arbitrary waveform excitation board card comprises a universal serial bus (USB) interface circuit, a static random access memory (SRAM), a waveform synthesis circuit, a field programmable gate array (FPGA) and a waveform power amplification circuit, wherein the USB interface circuit can receive waveform data points from an upper computer; the SRAM is used for storing the waveform data points; the waveform synthesis circuit converts the waveform data points into waveform analogue signals according to a certain time sequence; the FPGA controls the reception, storage and synthesis of the waveform data points; the waveform power amplification circuit performs power amplification on the waveform analogue signals; and the overall structure of the waveform power amplification circuit adopts a differential amplification form, so that harmonic distortion and temperature drift can be effectively suppressed; and the waveform power amplification circuit is used together with the waveform synthesis circuit capable of forming various waveforms to implement the ultrasonic guided wave excitation board card capable of generating arbitrary waveforms.
Description
Technical field
Realized that a kind of supersonic guide-wave that is used to encourage piezoelectric transducer array to produce random waveform encourages integrated circuit board, belongs to the Non-Destructive Testing field.
Background technology
In industrial circle, based on the supersonic guide-wave technology pipeline and plate structure health status being detected is a positive fast-developing detection technique, and its great advantage is a safety when detecting, easy, reliable, accurate and precision is high.This technological core is to motivate the supersonic guide-wave that is adapted at propagating in the detected object, and in view of the complicated diversity and the needs that detect little defective algorithm of detected object structured material, the excitation integrated circuit board should provide the ability of the random waveform of ability excitation frequency adjustable amplitude value.As to realize the time anti-little defects detection ability that improves that focuses on of supersonic guide-wave needing the excitation integrated circuit board can launch the program-controlled arbitrary shape high-voltage pulse of amplitude waveform; As to realize that the frequency sweep detection needs the excitation integrated circuit board can launch the high pressure frequency sweep ripple with certain bandwidth, to improve detection speed.At present; Widely used in the world two kinds of guided wave checkout equipments that are used for long distance detecting; A kind of is the WaveMarker G3 to the piezoelectric transducer array design of Britain GUL company; A kind of in addition is that these two kinds of equipment all are through encouraging single mode to realize defects detection at the less Frequency point of frequency dispersion by the MsSR3030 guided wave detection system of U.S. Southwest Research Inst. to the magnetostrictive transducer exploitation.Thereby the excitation integrated circuit board in these equipment all can only generate the narrow-band impulse of certain fixed type, does not possess the function that the excitation piezoelectric transducer produces random waveform, and further developing of guided wave detection technology produced great restriction.
Summary of the invention
The purpose of this invention is to provide a kind of program-controlled, broadband of encouraging random waveform, high-power, small size, be prone to the excitation integrated circuit board of expansion.
Excitation piezoelectric transducer array among the present invention produces the random waveform excitation integrated circuit board of supersonic guide-wave; Comprise the usb circuit that can receive the host computer waveform data points; The SRAM that is used for the stored waveform data point; With the waveform combiner circuit of waveform data points according to certain sequential conversion formation waveform modelling signal, control usb circuit, SRAM, waveform combiner circuit carry out waveform data points and receive, store and synthetic FPGA, the waveform power amplifier that the waveform modelling signal is carried out power amplification; Wherein the waveform power amplifier adopts the difference structure for amplifying, can effectively reduce the interference and the distortion of amplifying signal, cooperates with the waveform combiner circuit that can form various waveforms, has realized producing the supersonic guide-wave excitation integrated circuit board of various waveforms.
The major function of described waveform power amplifier is that the miniwatt excitation waveform signal that the synthetic stimulating module of waveform is produced is carried out power amplification; So that can effectively encourage piezoelectric sensor array to produce ultrasonic guided wave signals, this part is wanted to realize the high-power linear amplification in broadband.For realizing above-mentioned purpose; At first unbalanced signal is become the two-way balanced signal with power divider; Then two paths of signals is carried out power amplification respectively; Two paths of signals after will amplifying with power combiner carries out power and synthesizes one road unbalanced signal, and the structure that adopts difference to amplify can effectively reduce harmonic distortion.For carrying out long distance detecting on a large scale, needing to produce has the pumping signal than macro-energy, and the peripheral circuit of selecting for use powerful metal-oxide-semiconductor field effect transistor and high-power discrete component to constitute is realized power amplifying system.In order to expand the bandwidth of output signal, between the drain and gate of the FET of every road amplifying circuit, introduce negative feedback.
Said waveform power amplifier is formed by connecting following device:
FET wherein is U27 and U14; The bias voltage of U14 and U27 is provided by voltage source V CC3; VCC3 is that U27 and U14 provide bias voltage through the two-way biasing circuit respectively after filtering; Wherein one road biasing circuit is by potentiometer R50, diode D10, the resistance R 25 series connections grid to U27, and the grid series resistor R32 by U27 extremely forms again, and another road biasing circuit is by potentiometer R53, diode D11, resistance R 33, the resistance R 34 series connections grid to U14; Grid series resistor R35 by U14 extremely forms again, and diode D10 wherein and diode D11 all forward are connected; The drain electrode of U27 and U14 meets VCC3 through filtering circuit through resistance R 26 and resistance R 30 respectively again; The source electrode of U27 and U14 is respectively through parallel resistor R9, capacitor C 10 and parallel resistor R10, capacitor C 18 ground connection.
Power division transformer wherein is TR1; The former termination waveform modelling signal of TR1, the output of TR1 forms the two-way difference mode signal, receives U27 and U14 respectively; Wherein leading up to capacitor C 7, resistance R 31 is connected to the grid of U27, leads up to capacitor C 20, resistance R 34 in addition to be connected to the grid of U14.
1 pin and 3 pin of the synthetic transformer TR2 of power are received in the drain electrode of U27 and U14 respectively through capacitor C 28 and capacitor C 29 as output; 2 pin of TR2 and 1 pin of TR3,4 pin link to each other, the 3 pin ground connection of 4 pin of TR2 and TR3, and 2 pin of TR3 are exported as composite signal, the direct BNC2 of 2 pin of TR3 wherein, and through resistance R 36 ground connection.
Said feedback circuit is connected on respectively between the drain and gate of U27 and U14, and this feedback circuit is made up of resistance and electric capacity, wherein, is linked to each other with resistance R 38 by capacitor C 9 between the drain and gate of U27; Link to each other with resistance R 39 by capacitor C 48 between the drain and gate of U14.
Between the source electrode of U27 and U14 and grid, be connected to holding circuit respectively, this holding circuit is made up of the diode of two butt joints, wherein, is D14, D15 between the drain and gate of U27; Between the drain and gate of U14 D12, D13.
Between the grid of voltage source V CC3 and FET U27 and U14 and drain electrode, be provided with filtering circuit, this filtering circuit all adopts the wave filter of being made up of electric capacity and inductance, and its structure is divided into three the tunnel,
One the tunnel: voltage source V CC3 is through capacitor C P26 ground connection, and voltage source V CC3 connects inductance L 24 simultaneously, be connected with the biasing circuit of U27 and U14 respectively after inductance L 24 and the inductance L 25 different name ends serial connection, and capacitor C 6 ground connection passed through in the junction of inductance L 24 and inductance L 25.
Two the tunnel: voltage source V CC3 is through capacitor C P8 ground connection, and voltage source V CC3 connects inductance L 17 simultaneously, and inductance L 17 is connected in series after resistance R 26 connects the drain electrode of U27 with inductance L 10 different name ends, and inductance L 17 is passed through capacitor C 8 ground connection with the junction of inductance L 10.
Three the tunnel: voltage source V CC3 is through capacitor C P9 ground connection, and voltage source V CC3 connects inductance L 18 simultaneously, and inductance L 18 is connected in series after resistance R 30 connects the drain electrode of U14 with inductance L 16 different name ends, and inductance L 18 is passed through capacitor C 27 ground connection with the junction of inductance L 16.
Description of drawings
Fig. 1, the present invention encourage piezoelectric transducer array to produce the theory diagram of the random waveform excitation integrated circuit board of supersonic guide-wave;
The random waveform that Fig. 2, the present invention encourage piezoelectric transducer array to produce supersonic guide-wave encourages an embodiment circuit diagram of the waveform power amplifier in the integrated circuit board.
Time anti-ripple oscillogram after Fig. 3, normalization are handled
Fig. 4, the synthetic time anti-ripple oscillogram of combiner circuit
The normalization frequency response curve of Fig. 5, waveform power amplifier
Embodiment
Below in conjunction with Fig. 1～Fig. 5 the present invention is further described:
The random waveform that this excitation piezoelectric transducer array produces supersonic guide-wave encourages the structured flowchart of integrated circuit board as shown in Figure 1; Host computer produces waveform data points; FPGA control usb circuit receives waveform data points; And being sent to the SRAM storer in the excitation integrated circuit board, FPGA takes out waveform data points and waveform data points is carried out the sequential conversion from SRAM, sends to the waveform combiner circuit then and forms the waveform modelling signal; Through the waveform power amplifier waveform modelling signal is carried out power amplification, be transported to piezoelectric transducer array then.
FPGA in the present embodiment is the Spartan-III series on-site programmable gate array of Xilinx company.Transmission, storage, the synthetic whole process of waveform in FPGA control waveform data.Contain 14 figure place weighted-voltage D/A converters during waveform is synthetic, digital to analog converter converts waveform data points to the corresponding simulating signal, amplifies through follow-up amplifying circuit then.For the waveform complex functionality of this random waveform excitation integrated circuit board is described, when actual detected, need synthesize the time anti-ripple as shown in Figure 3, as shown in Figure 4 through the waveform that this circuit is synthetic, both are more similar, explain that this excitation plate jig has the function of anti-ripple when generating.
Waveform power amplifier such as Fig. 2 in the present embodiment; Two FETs of main employing are as amplifying device; Two groups of transformers also comprise components and parts such as power resistor, electric capacity, diode, power inductance, slide rheostat, inductance in addition respectively as power division transformer and the synthetic transformer of power.Above-mentioned waveform power amplifier is realized as follows:
Wherein, FET is U27 and U14; The bias voltage of U14 and U27 is provided by voltage source V CC0, and VCC0 is respectively U27 and U14 provides bias voltage through the two-way biasing circuit, and wherein one road biasing circuit is by potentiometer R50, diode D10, resistance R 25, the resistance R 31 series connections grid to U27; Grid series resistor R32 by U27 extremely forms again; Another road biasing circuit is by potentiometer R53, diode D11, resistance R 33, the resistance R 34 series connections grid to U14, and the grid series resistor R35 by U14 extremely forms again, and diode D10 wherein and diode D11 all forward are connected; The drain electrode of U27 and U14 meets VCC1 and VCC2 through resistance R 26 and resistance R 30 respectively; The source electrode of U27 and U14 is respectively through parallel resistor R9, capacitor C 10 and parallel resistor R10, capacitor C 18 ground connection.Be connected into the power supply of 12V by the ferric phosphate lithium cell of 4 3V, directly offer VCC0, the high pressure that behind boosting inverter, generates hundreds of volts respectively offers VCC1 and VCC2.
Power division transformer wherein is TR1; The former termination waveform modelling signal of TR1, the output of TR1 forms difference mode signal, receives U27 and U14 respectively; Wherein leading up to capacitor C 7, resistance R 31 is connected to the grid of U27, leads up to capacitor C 20, resistance R 34 in addition to be connected to the grid of U14.
1 pin and 3 pin of the synthetic transformer TR2 of power are received in the drain electrode of U27 and U14 respectively through capacitor C 28 and capacitor C 29 as output; 2 pin of TR2 and 1 pin of TR3,4 pin link to each other, the 3 pin ground connection of 4 pin of TR2 and TR3, and 2 pin of TR3 are exported as composite signal, the direct BNC2 of 2 pin of TR3 wherein, and through resistance R 36 ground connection.
In order to expand the bandwidth of output signal, be connected to feedback circuit between the drain and gate of U27 and U14 respectively, this feedback circuit is made up of resistance and electric capacity.Wherein, link to each other with resistance R 38 by capacitor C 9 between the drain and gate of U27; Link to each other with resistance R 39 by capacitor C 48 between the drain and gate of U14.In order to make stable output signal and to prevent the influence of sudden power to FET, be connected to holding circuit between the source electrode of U27 and U14 and grid respectively, this holding circuit is made up of the diode of two butt joints.Wherein, between the drain and gate of U27 be D14, D15; Between the drain and gate of U14 D12, D13.
For the interference that prevents direct supply gets into circuit; Prevent also that simultaneously AC signal from scurrying into direct supply, the grid of voltage source V CC3 and FET U27 and U14 and drain between be provided with filtering circuit, this filtering circuit all adopts the wave filter of being made up of electric capacity and inductance; Its structure is divided into three the tunnel
One the tunnel: voltage source V CC3 is through capacitor C P26 ground connection, and voltage source V CC3 connects inductance L 24 simultaneously, be connected with the biasing circuit of U27 and U14 respectively after inductance L 24 and the inductance L 25 different name ends serial connection, and capacitor C 6 ground connection passed through in the junction of inductance L 24 and inductance L 25.
Two the tunnel: voltage source V CC3 is through capacitor C P8 ground connection, and voltage source V CC3 connects inductance L 17 simultaneously, and inductance L 17 is connected in series after resistance R 26 connects the drain electrode of U27 with inductance L 10 different name ends, and inductance L 17 is passed through capacitor C 8 ground connection with the junction of inductance L 10.
Three the tunnel: voltage source V CC3 is through capacitor C P9 ground connection, and voltage source V CC3 connects inductance L 18 simultaneously, and inductance L 18 is connected in series after resistance R 30 connects the drain electrode of U14 with inductance L 16 different name ends, and inductance L 18 is passed through capacitor C 27 ground connection with the junction of inductance L 16.
After this partial circuit is accomplished in design, its performance to be tested, the frequency response curve that obtains is like Fig. 5.The bandwidth of this power amplifier is at least 2MHz, and in the sensing range of supersonic guide-wave, has bandpass flatness preferably.Anti-focus detection when this integrated circuit board can not only be used for can also be used for other focus detection methods research.
What should explain at last is: above embodiment the present invention only is described and and unrestricted technical scheme described in the invention; Therefore, although this instructions has carried out detailed explanation to the present invention with reference to each above-mentioned embodiment,, those of ordinary skill in the art should be appreciated that still and can make amendment or be equal to replacement the present invention; And all do not break away from the technical scheme and the improvement thereof of the spirit and the scope of invention, and it all should be encompassed in the middle of the claim scope of the present invention.
Claims (4)
1. the excitation piezoelectric transducer array produces the random waveform excitation integrated circuit board of supersonic guide-wave; Comprise the usb circuit that can receive the host computer waveform data points; The SRAM that is used for the stored waveform data point; Wave data is pressed the waveform combiner circuit that certain sequential conversion forms the waveform modelling signal, and control usb circuit, SRAM, waveform combiner circuit carry out waveform data points and receive, store and synthetic FPGA, the waveform power amplifier that the waveform modelling signal is carried out power amplification; It is characterized in that said waveform power amplifier adopts following method to realize:
A) unbalanced signal with input becomes the two-way balanced signal with the power distribution transformer,
B) peripheral circuit that constitutes with two high-power FETs and high-power discrete component carries out power amplification respectively with two paths of signals;
C) adopt the synthetic transformer of broadband power, the two paths of signals after amplifying is synthesized one road unbalanced signal.
D) every branch road adopts the voltage negative feedback to expand the output signal bandwidth.
2. excitation piezoelectric transducer array as claimed in claim 1 produces the random waveform excitation integrated circuit board of supersonic guide-wave, it is characterized in that said waveform power amplifier is formed by connecting following device:
Comprise that two FET U27 and U14, a power division transformer TR1, two power synthesize transformer TR2 and TR3, wherein,
The bias voltage of U14 and U27 is provided by voltage source V CC3; Wherein VCC3 is that U27 and U14 provide bias voltage through the two-way biasing circuit respectively after filtering; Wherein one road biasing circuit is by potentiometer R50, diode D10, the resistance R 25 series connections grid to U27; Grid series resistor R32 by U27 extremely forms again; Another road biasing circuit is by potentiometer R53, diode D11, resistance R 33, the resistance R 34 series connections grid to U14, and the grid series resistor R35 by U14 extremely forms again, and diode D10 wherein and diode D11 all forward are connected; The drain electrode of U27 and U14 meets VCC3 through filtering circuit through resistance R 26 and resistance R 30 respectively again; The source electrode of U27 and U14 is respectively through parallel resistor R9, capacitor C 10 and parallel resistor R10, capacitor C 18 ground connection;
2 pin of TR1 connect 1 pin of first BNC connector; The equal ground connection of 2,3,4 pin of 1 pin of TR1 and first BNC connector; TR1 is output as differential signal and exports from 3 pin and 4 pin of TR1 respectively; Wherein 3 pin of TR1 are connected to the grid of U14 through capacitor C 20, resistance R 34, and 4 pin of TR1 are connected to the grid of U27 through capacitor C 7, resistance R 31; 1 pin and 3 pin of TR2 are received in the drain electrode of U27 and U14 respectively through capacitor C 28 and capacitor C 29 as output; 2 pin of TR2 and 1 pin of TR3,4 pin link to each other, the 3 pin ground connection of 4 pin of TR2 and TR3, and 2 pin of TR3 are exported as composite signal, and are connected to 1 pin of second BNC connector through resistance R 37, simultaneously through resistance R 36 ground connection.
Said feedback circuit is connected on respectively between the drain and gate of U27 and U14, and this feedback circuit is made up of resistance and electric capacity, wherein, is linked to each other with resistance R 38 by capacitor C 9 between the drain and gate of U27; Link to each other with resistance R 39 by capacitor C 48 between the drain and gate of U14.
3. excitation piezoelectric transducer array as claimed in claim 2 produces the random waveform excitation integrated circuit board of supersonic guide-wave; It is characterized in that: be connected to holding circuit between the source electrode of U27 and U14 and grid respectively; This holding circuit is made up of the diode of two butt joints; Wherein, between the drain and gate of U27 be D14, D15; Between the drain and gate of U14 D12, D13.
4. excitation piezoelectric transducer array as claimed in claim 2 produces the random waveform excitation integrated circuit board of supersonic guide-wave; It is characterized in that: be provided with filtering circuit between the grid of voltage source V CC3 and U27 and U14 and drain electrode; This filtering circuit all adopts the wave filter of being made up of electric capacity and inductance; Its structure is divided into three the tunnel
One the tunnel: voltage source V CC3 is through capacitor C P26 ground connection, and voltage source V CC3 connects inductance L 24 simultaneously, be connected with the biasing circuit of U27 and U14 respectively after inductance L 24 and the inductance L 25 different name ends serial connection, and capacitor C 6 ground connection passed through in the junction of inductance L 24 and inductance L 25.
Two the tunnel: voltage source V CC3 is through capacitor C P8 ground connection, and voltage source V CC3 connects inductance L 17 simultaneously, and inductance L 17 is connected in series after resistance R 26 connects the drain electrode of U27 with inductance L 10 different name ends, and inductance L 17 is passed through capacitor C 8 ground connection with the junction of inductance L 10.
Three the tunnel: voltage source V CC3 is through capacitor C P9 ground connection, and voltage source V CC3 connects inductance L 18 simultaneously, and inductance L 18 is connected in series after resistance R 30 connects the drain electrode of U14 with inductance L 16 different name ends, and inductance L 18 is passed through capacitor C 27 ground connection with the junction of inductance L 16.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210034063XA CN102565200A (en) | 2012-02-15 | 2012-02-15 | Arbitrary waveform excitation board card for exciting piezoelectric transducer array to generate ultrasonic guided waves |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210034063XA CN102565200A (en) | 2012-02-15 | 2012-02-15 | Arbitrary waveform excitation board card for exciting piezoelectric transducer array to generate ultrasonic guided waves |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102565200A true CN102565200A (en) | 2012-07-11 |
Family
ID=46411162
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210034063XA Pending CN102565200A (en) | 2012-02-15 | 2012-02-15 | Arbitrary waveform excitation board card for exciting piezoelectric transducer array to generate ultrasonic guided waves |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102565200A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104485927A (en) * | 2014-12-31 | 2015-04-01 | 深圳先进技术研究院 | Excitation device for ultrasonic sensor array |
| CN105588881A (en) * | 2015-12-13 | 2016-05-18 | 北京工业大学 | Portable ultrasonic detector for railway power supply net touching pin |
| CN110311654A (en) * | 2019-07-08 | 2019-10-08 | 深圳开立生物医疗科技股份有限公司 | A kind of pulse correcting method and pulse correction circuit |
| CN110658261A (en) * | 2019-10-10 | 2020-01-07 | 天津科技大学 | Structural health monitoring frequency selection method based on ultrasonic guided waves |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002168650A (en) * | 2000-11-28 | 2002-06-14 | Mitsutoyo Corp | Continuous sinusoidal wave drive circuit for inductive position transducer |
| CN1775328A (en) * | 2005-12-01 | 2006-05-24 | 上海交通大学 | Wide focal domain phased array focusing ultrasonic transducer exciting bunk |
| US20070113677A1 (en) * | 2005-10-24 | 2007-05-24 | Hydrometer Gmbh | Converter control with LC filtering |
| CN101694994A (en) * | 2009-10-30 | 2010-04-14 | 北京工业大学 | Ultrasonic transducer array stimulating receiving multi-channel controllable switch in plate |
| CN101701939A (en) * | 2009-11-06 | 2010-05-05 | 华中科技大学 | Broad-frequency high-power electromagnetic exciting device |
| CN202661448U (en) * | 2012-02-15 | 2013-01-09 | 北京工业大学 | Arbitrary waveform excitation board card for exciting piezoelectric transducer array to generate ultrasonic guided waves |
-
2012
- 2012-02-15 CN CN201210034063XA patent/CN102565200A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002168650A (en) * | 2000-11-28 | 2002-06-14 | Mitsutoyo Corp | Continuous sinusoidal wave drive circuit for inductive position transducer |
| US20070113677A1 (en) * | 2005-10-24 | 2007-05-24 | Hydrometer Gmbh | Converter control with LC filtering |
| CN1775328A (en) * | 2005-12-01 | 2006-05-24 | 上海交通大学 | Wide focal domain phased array focusing ultrasonic transducer exciting bunk |
| CN101694994A (en) * | 2009-10-30 | 2010-04-14 | 北京工业大学 | Ultrasonic transducer array stimulating receiving multi-channel controllable switch in plate |
| CN101701939A (en) * | 2009-11-06 | 2010-05-05 | 华中科技大学 | Broad-frequency high-power electromagnetic exciting device |
| CN202661448U (en) * | 2012-02-15 | 2013-01-09 | 北京工业大学 | Arbitrary waveform excitation board card for exciting piezoelectric transducer array to generate ultrasonic guided waves |
Non-Patent Citations (1)
| Title |
|---|
| 何存富等: "超声导波任意波形脉冲激励源的设计与实现", 《测控技术》 * |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104485927A (en) * | 2014-12-31 | 2015-04-01 | 深圳先进技术研究院 | Excitation device for ultrasonic sensor array |
| CN104485927B (en) * | 2014-12-31 | 2018-05-11 | 深圳先进技术研究院 | The exciting bank of array of ultrasonic sensors |
| CN105588881A (en) * | 2015-12-13 | 2016-05-18 | 北京工业大学 | Portable ultrasonic detector for railway power supply net touching pin |
| CN110311654A (en) * | 2019-07-08 | 2019-10-08 | 深圳开立生物医疗科技股份有限公司 | A kind of pulse correcting method and pulse correction circuit |
| CN110311654B (en) * | 2019-07-08 | 2023-05-05 | 深圳开立生物医疗科技股份有限公司 | Pulse correction method and pulse correction circuit |
| CN110658261A (en) * | 2019-10-10 | 2020-01-07 | 天津科技大学 | Structural health monitoring frequency selection method based on ultrasonic guided waves |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US10890651B2 (en) | Transmit/receive system for imaging devices | |
| CN102565200A (en) | Arbitrary waveform excitation board card for exciting piezoelectric transducer array to generate ultrasonic guided waves | |
| CN202661448U (en) | Arbitrary waveform excitation board card for exciting piezoelectric transducer array to generate ultrasonic guided waves | |
| CN104236505A (en) | Pipeline corrosion monitoring device based on array type piezoelectric film sensor | |
| CN203323692U (en) | Detection circuit of displacement sensor | |
| CN105223273A (en) | A kind of motor train unit crackle detecting instrument | |
| CN103142250B (en) | Ultrasonic Doppler signal detection circuit | |
| CN102788709A (en) | Automatic remainder detection device and method for spaceborne electronic equipment | |
| CN202903119U (en) | Detection circuit for displacement sensor | |
| CN101701939B (en) | Broad-frequency high-power electromagnetic exciting device | |
| CN113078883B (en) | Magnetic flux control type memcapacitor equivalent circuit and control method thereof | |
| CN102818687B (en) | Dynamic force signal processing system used for force limit control vibration test of aircraft | |
| CN204085486U (en) | A kind of corrosive pipeline monitoring device based on array piezoelectric film sensor | |
| CN104685331A (en) | Improved measurement amplifying circuit for piezoelectric sensor positioned in an internal combustion engine | |
| CN101834523B (en) | High pressure pulse generating system for obtaining random-wave-form forced response and working procedure thereof | |
| CN103138696A (en) | Electric charge integrating amplifier | |
| CN210834776U (en) | Ultrasonic flaw detector | |
| CN105629059A (en) | Signal detection method | |
| CN205246763U (en) | Airtight space electric field measuring equipment | |
| CN105425684B (en) | A kind of collecting method and device controlled based on FPGA | |
| CN203951445U (en) | Preamplifier | |
| CN114326542A (en) | Signal generating circuit for industrial hybrid control | |
| CN105227149B (en) | On-line NMR broadband RF signal power amplification circuit | |
| CN102480274A (en) | Equiamplitude amplification circuit for ultrasonic tests | |
| CN104935276B (en) | Linear power amplifying device for the generation of electromagnetic ultrasonic guide wave pumping signal |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20120711 |