CN101576537A - Ultrasound phased array exciting bank - Google Patents
Ultrasound phased array exciting bank Download PDFInfo
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- CN101576537A CN101576537A CNA2009101483319A CN200910148331A CN101576537A CN 101576537 A CN101576537 A CN 101576537A CN A2009101483319 A CNA2009101483319 A CN A2009101483319A CN 200910148331 A CN200910148331 A CN 200910148331A CN 101576537 A CN101576537 A CN 101576537A
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- phased array
- delay
- exciting bank
- circuit
- ultrasound phased
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Abstract
The invention provides an ultrasound phased array exciting bank, comprising a pulse generator based on FPGA, a fine delay circuit, a power amplifying circuit and a protective circuit. The ultrasound phased array exciting bank consists of 8 passages, and the structure of each passage is identical. The method comprises the following steps: firstly, generating impulse waves inside the FPGA by programming; realizing delay within 10 ns after coarse delay and fine delay circuit; obtaining the high voltage pulse to stimulate the ultrasonic phased arrays transducer array elements, as the impulse wave after delay goes through the pulse amplifying circuit. The device can change impulse width and delay time flexibly and the delay precision is 1 ns.
Description
One, technical field
What the present invention relates to is a kind of exciting bank, specifically a kind of hyperchannel pulsating ultrasound phased array exciting bank.
Two, technical background
The general single channel probe that uses in traditional ultrasonic testing system, single probe be for the workpiece that detects irregular or complicated shape, poor reliability, cause easily erroneous judgement or (with) fail to judge.The ultrasonic phase array detection technique then adopts a plurality of array elements to carry out Ultrasonic Detection, adopts electronic method control wave beam to focus on and scanning, has good wave beam accessibility, can not only the workpiece of irregular or complicated shape be detected, and can improve detection speed.Because each wave beam is in focus place coherence stack, the signal to noise ratio (S/N ratio) of detection signal has also had raising extremely significantly.For dynamic focusing and the deflection that realizes wave beam, need the multichannel ultrasonic phase array emission coefficient of a cover, according to encouraging each array element predetermined time delay respectively.
Key link during the ultrasonic phase array launching beam forms is that the transmitter, phase of each array element is postponed accurately to control, and obtaining flexible and controllable, directive property is good, focal spot size is tiny focus beam, thereby obtains the testee blur-free imaging.
Past general analog delay line that uses in supersonic imaging apparatus is realized phase delay, and this delayed mode has three big shortcomings: (1) is bulky, complex structure; (2) inconvenience realizes dynamic focusing and signal Processing.(3) electric parameter is difficult to stablize.New developing direction is to replace original analogue delay with digital delay, and digital delay is owing to precision height, control are convenient, and advantages such as good stability become research direction in recent years.
Three, summary of the invention
The object of the present invention is to provide a kind of pulsating ultrasound phased array exciting bank.
The object of the present invention is achieved like this: it comprises based on the formation of field programmable gate array (FPGA) launching beam device, programmable delay circuit and pulse voltage amplifying circuit and holding circuit; The adjustable pulsating wave of generation pulse width after the FPGA launching beam forms device to carry out coarse delay; In programmable delay circuit, carefully postpone then; Obtain high-voltage pulse signal de-energisation phase array transducer through the pulse voltage amplifying circuit again.
Because the present invention has adopted above design proposal, control lag time and pulse width neatly, the highest sample frequency is 100MHz, be applicable to that centre frequency is 0.1～10MHz phase array transducer, the delay precision is 1ns.
(4) description of drawings
Fig. 1 is the schematic diagram of ultrasonic phase array emission coefficient
Fig. 2 is that the FPGA launching beam forms device
Fig. 3 is meticulous delay circuit schematic diagram
Fig. 4 is a high pressure amplifying circuit schematic diagram
(5) specific implementation method
For example the present invention is done more detailed description below in conjunction with accompanying drawing:
In conjunction with Fig. 1, ultrasound phased array exciting bank comprises that field programmable gate array (FPGA) launching beam forms device, programmable delay circuit and pulse voltage amplifying circuit and holding circuit.
In conjunction with Fig. 2, the FPGA launching beam forms device according to predetermined time delay and pulse width, and the pulsating wave that output delay and pulsewidth are adjustable is as the driving source of 8 passages, in each passage, be made up of delay counter module and pulsewidth counting module respectively, pulse width should be by the following formula adjustment:
W
p×f
0＝500 (1)
W wherein
pBe pulse width; f
0Centre frequency for transducer.
In conjunction with Fig. 3, the fine delay circuit of single passage is made of three DS1020 chip cascades respectively, and the programmable delay value of each chip is transmitted by serial data input pin D and serial data output pin Q, and the time delay of each chip is identical; Output signal respectively with the PIN of pulse amplifying circuit, NIN links to each other with the DAMP pin.
In conjunction with Fig. 4, it is the core circuit of various impulse ultrasound detecting instruments that high-voltage pulse produces circuit, the high-voltage pulse amplifying circuit that utilizes discrete component to build, not only can take more printed circuit board area, and performance also is subjected to certain influence, and the present invention utilizes HV732 monolithic integrated chip design high-voltage pulse generator.Wherein PIN, NIN are respectively the input pin of pulse signal, and DAMP is the input pin that signal is made zero fast, and output terminal is through two differential outputs of diode BAV99.
Transmitting and receiving the identical transducer of use under the mode, transducer also will be connected to the amplifier of receiving circuit, therefore in emission high-voltage pulse wave process, the amplifier of receiving system must be avoided the destruction of high-voltage power supply, and in receiving echo process, be preferably in and remove the noise that high-voltage power supply is eliminated pulse producer in the circuit.The present invention adopts crossed diodes bridge type holding circuit at transmitting terminal, isolates the emission high-voltage pulse.
Claims (8)
1, a kind of ultrasound phased array exciting bank, it comprises pulse producer, fine delay circuit, power amplification circuit and holding circuit.It is characterized in that ultrasound phased array exciting bank is made up of a plurality of transmission channels, each passage has identical structure; Pulse producer is used to produce pulse width and postpones adjustable pulsating wave; The fine delay circuit realizes that 10ns is with interior delay; The power amplification circuit pulse signals is amplified, and is used for encouraging phase array transducer; Holding circuit is to prevent that high-voltage signal from damaging the amplifier of receiving system, in receiving echo process, removes the noise that high-voltage power supply is eliminated pulse producer.
2, ultrasound phased array exciting bank according to claim 1 is characterized in that: be made of 8 transmission channels.
3, ultrasound phased array exciting bank according to claim 1 is characterized in that: at the pulsating wave energisation mode.
4, ultrasound phased array exciting bank according to claim 1 is characterized in that: crystal oscillator frequency f is 100MHz.
5, ultrasound phased array exciting bank according to claim 1 is characterized in that: in order to improve the delay precision, and the method that adopts the thin delay of FPGA coarse delay and DS1020 to combine in the exciting bank.
6, according to claim 1 and 5 described ultrasound phased array exciting banks, it is characterized in that: described fine delay circuit, minimum delay precision are 1ns.
7, ultrasound phased array exciting bank according to claim 1 is characterized in that: described pulse amplifying circuit is made of the monolithic integrated circuit chip, can produce ± the 100V high-voltage pulse is as driving source.
8, ultrasound phased array exciting bank according to claim 1 is characterized in that: the sample frequency of A/D converter is up to 100MHz, is applicable to 0.1～10MHz ultrasonic phased array transducer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2009101483319A CN101576537A (en) | 2009-06-16 | 2009-06-16 | Ultrasound phased array exciting bank |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2009101483319A CN101576537A (en) | 2009-06-16 | 2009-06-16 | Ultrasound phased array exciting bank |
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| CN101576537A true CN101576537A (en) | 2009-11-11 |
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| Application Number | Title | Priority Date | Filing Date |
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| CNA2009101483319A Pending CN101576537A (en) | 2009-06-16 | 2009-06-16 | Ultrasound phased array exciting bank |
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Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102759575A (en) * | 2011-04-25 | 2012-10-31 | 上海宝信软件股份有限公司 | Multi-channel ultrasonic testing equipment triggering method based on triggering table |
| CN103060545A (en) * | 2013-01-21 | 2013-04-24 | 北京理工大学 | Multi-path high-energy ultrasonic field treatment device for regulating and controlling welding residual stress |
| CN103076821A (en) * | 2013-01-21 | 2013-05-01 | 北京理工大学 | In-situ sound energy control method for residual stress fields of elastic solids |
| CN103368507A (en) * | 2013-08-05 | 2013-10-23 | 中国石油大学(华东) | Sound wave excitation signal amplifier with turn-off controlling function |
| CN103837601A (en) * | 2012-11-26 | 2014-06-04 | 中国科学院声学研究所 | Broadband guided wave phased array focusing and scanning method and system |
| CN104034809A (en) * | 2014-05-21 | 2014-09-10 | 中国飞机强度研究所 | 128-channel ultrasonic phased array exciting pulse generating system and 128-channel ultrasonic phased array exciting pulse generating method |
| CN105842347A (en) * | 2016-03-29 | 2016-08-10 | 河海大学常州校区 | Time division multiplexing high power phased array ultrasonic signal generating device |
| CN106404911A (en) * | 2016-11-15 | 2017-02-15 | 哈尔滨工业大学 | True-time-delay single-mode Lamb wave phased array control system used for platy structure detection |
| CN106896160A (en) * | 2015-12-17 | 2017-06-27 | 中国石油天然气股份有限公司 | The signal excitation circuit of pipeline anticorrosion coating repaired mouth quality of adhesive detection machine |
| CN109283258A (en) * | 2017-07-19 | 2019-01-29 | 中国科学院声学研究所 | A kind of detection system based on ultrasonic phase array |
| CN109283251A (en) * | 2017-07-19 | 2019-01-29 | 中国科学院声学研究所 | A kind of signal processing circuit of borehole wall imaging ultrasound phased array |
| CN110596253A (en) * | 2019-07-22 | 2019-12-20 | 株洲时代电子技术有限公司 | Steel rail flaw detection signal generation and processing device |
-
2009
- 2009-06-16 CN CNA2009101483319A patent/CN101576537A/en active Pending
Cited By (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102759575B (en) * | 2011-04-25 | 2016-01-06 | 上海宝信软件股份有限公司 | A kind of channel ultrasonic checkout equipment triggering method based on trigger table |
| CN102759575A (en) * | 2011-04-25 | 2012-10-31 | 上海宝信软件股份有限公司 | Multi-channel ultrasonic testing equipment triggering method based on triggering table |
| CN103837601A (en) * | 2012-11-26 | 2014-06-04 | 中国科学院声学研究所 | Broadband guided wave phased array focusing and scanning method and system |
| CN103060545A (en) * | 2013-01-21 | 2013-04-24 | 北京理工大学 | Multi-path high-energy ultrasonic field treatment device for regulating and controlling welding residual stress |
| CN103076821A (en) * | 2013-01-21 | 2013-05-01 | 北京理工大学 | In-situ sound energy control method for residual stress fields of elastic solids |
| CN103060545B (en) * | 2013-01-21 | 2016-03-30 | 北京理工大学 | A kind of multipath high-energy ultrasonic sound field treatment unit for regulating and controlling welding residual stress |
| CN103368507A (en) * | 2013-08-05 | 2013-10-23 | 中国石油大学(华东) | Sound wave excitation signal amplifier with turn-off controlling function |
| CN104034809A (en) * | 2014-05-21 | 2014-09-10 | 中国飞机强度研究所 | 128-channel ultrasonic phased array exciting pulse generating system and 128-channel ultrasonic phased array exciting pulse generating method |
| CN106896160A (en) * | 2015-12-17 | 2017-06-27 | 中国石油天然气股份有限公司 | The signal excitation circuit of pipeline anticorrosion coating repaired mouth quality of adhesive detection machine |
| CN105842347A (en) * | 2016-03-29 | 2016-08-10 | 河海大学常州校区 | Time division multiplexing high power phased array ultrasonic signal generating device |
| CN105842347B (en) * | 2016-03-29 | 2019-03-15 | 河海大学常州校区 | A kind of time-multiplexed high-power phased array supersonic signal generation apparatus |
| CN106404911A (en) * | 2016-11-15 | 2017-02-15 | 哈尔滨工业大学 | True-time-delay single-mode Lamb wave phased array control system used for platy structure detection |
| CN106404911B (en) * | 2016-11-15 | 2019-01-08 | 哈尔滨工业大学 | True time delay single mode Lamb wave phased array system for plate structure detection |
| CN109283258A (en) * | 2017-07-19 | 2019-01-29 | 中国科学院声学研究所 | A kind of detection system based on ultrasonic phase array |
| CN109283251A (en) * | 2017-07-19 | 2019-01-29 | 中国科学院声学研究所 | A kind of signal processing circuit of borehole wall imaging ultrasound phased array |
| CN109283258B (en) * | 2017-07-19 | 2020-07-17 | 中国科学院声学研究所 | Detection system based on ultrasonic phased array |
| CN110596253A (en) * | 2019-07-22 | 2019-12-20 | 株洲时代电子技术有限公司 | Steel rail flaw detection signal generation and processing device |
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Open date: 20091111 |