CN102662007A - Phased array ultrasonic transducer sound field scanning method - Google Patents
Phased array ultrasonic transducer sound field scanning method Download PDFInfo
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- CN102662007A CN102662007A CN2012101623439A CN201210162343A CN102662007A CN 102662007 A CN102662007 A CN 102662007A CN 2012101623439 A CN2012101623439 A CN 2012101623439A CN 201210162343 A CN201210162343 A CN 201210162343A CN 102662007 A CN102662007 A CN 102662007A
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Abstract
The invention relates to a phased array ultrasonic transducer sound field scanning method, and aims to realize the measurement and calibration of a phased array sound field. According to the sound field scanning method, sound pressure distribution in space, namely the sound field of a phased array ultrasonic transducer, where the ultrasonic waves are emitted by the phased array ultrasonic transducer is measured by controlling the movement of a hydrophone relative to the phased array ultrasonic transducer. The method is characterized in that phase control excitation and data acquisition are triggered by a position signal; the data on sound field are accurate; data are acquired in the whole reciprocal travel for scanning a motion axis; and the measurement efficiency is high.
Description
Technical field:
The present invention relates to the Ultrasonic NDT field, particularly phase array transducer acoustic field and calibration is a kind of scanning measuring method of phase array transducer sound field.
Background technology
The ultrasound phase-control technology is to adopt the phase place of each array element of method control transducer of software delay; Thereby the focusing of realization acoustic beam and deflection; Compare with traditional supersonic detection method; The phased array detection technique can be carried out scanning fast under situation mobile or mobile probe less, have good acoustic beam accessibility, can the workpiece and the blind area defective thereof of complex geometric shapes be detected; Through control focal spot size, burnt district's degree of depth and sound beam direction, performances such as detection resolution, signal to noise ratio (S/N ratio) are improved, make to detect to be able to good and fast completion.
To directly have influence on the precision of detection as the characteristic of the phase array transducer of phased detection system core component; And its various characteristics in use changes easily; Therefore necessary its characteristic is carried out periodic measurement and calibration, with the precision that guarantees to detect.In the various characteristics of phase array transducer, sound field characteristic is wherein crucial one.The sound field characteristic of phase array transducer has mainly comprised focal length, focal spot size, acoustic beam deflection angle and acoustic beam spread angle.The present invention proposes a kind of method that the scanning of phase array transducer sound field is measured that is used for, can measure the sound field characteristic of phase array transducer fast and accurately.
Summary of the invention:
The purpose of this invention is to provide a kind of method that the scanning of phase array transducer sound field is measured that is used for.This method has effectively realized measuring fast with accurately of phase array transducer sound field.
For achieving the above object; Design of the present invention is: trigger the positional precision that guarantees the acoustic pressure data through position signalling; Guarantee the synchronous of phased excitation and data acquisition through the array element pumping signal as synchronizing signal, improve scanning efficient through all carrying out data acquisition in the scanning campaign round trip.
According to above-mentioned inventive concept, technical scheme of the present invention is following:
The relative phase array transducer of nautical receiving set carries out the scanning campaign; Position through the monitoring of the scrambler card on its drive motor axle nautical receiving set; When reaching the data acquisition position of setting, the scrambler card sends the phased exciting bank of trigger pulse triggers, simultaneously the pumping signal of a certain array element of phase array transducer is drawn; Convert the TTL signal into through the signal conversion circuit; And this TTL signal received the external trigger end of high-speed collection card as synchronizing signal, and trigger and adopt number, make between phased excitation and data acquisition synchronously.And in sound field scanning measuring process, in the round trip of nautical receiving set scanning campaign, all carry out data acquisition, thereby guaranteeing to have improved scanning efficient under the high-precision condition.
Combine the above technical scheme of being taked, reality the object of the invention.
The invention has the beneficial effects as follows: through phased excitation of location triggered and data acquisition, guaranteed the precision of acoustic field, all carried out data acquisition through scanning campaign round trip and improved the efficient of measuring.
Description of drawings:
Fig. 1 the present invention measures phase array transducer sound field scanning schematic diagram
Fig. 2 signaling conversion circuit schematic diagram of the present invention
Fig. 3 sound field scanning of the present invention comes back production to count schematic diagram
In Fig. 1-3,1: computing machine; 2: the scrambler card; 3: data collecting card; 4: motion control card; 5: the phased exciting bank of phase array transducer; 6: signaling conversion circuit; 7: driver; 8 motors; 9: phase array transducer; 10: nautical receiving set; 11: tank; 12: photoelectrical coupler; 13 one shot multivibrators.
Specific embodiments:
Specific embodiments of the present invention combines detailed description of the drawings following:
Fig. 1 is the schematic diagram that the present invention measures phase array transducer sound field checking method.This measuring system comprises: computing machine (1), scrambler card (2), high-speed collection card (3), motion control card (4), the phased exciting bank of phase array transducer (5), signaling conversion circuit (6), driver (7), motor (8), phase array transducer (9), nautical receiving set (10), tank (11).
When carrying out acoustic field; Drive nautical receiving set (10) through motion control card (4) Control Driver (7) and motor (8) and carry out three-dimensional scanning campaign; Write down the position of nautical receiving set simultaneously by scrambler card (2); Adopt numerical digit when putting when what nautical receiving set arrive to be set, scrambler card (2) can send the external trigger mouth that a trigger pulse is given the phased exciting bank of phase array transducer, triggers phased exciting bank excitation phase array transducer emission ultrasound wave.Simultaneously the pumping signal of a certain array element of phase array transducer (9) is drawn; And convert undersuing into the TTL signal through signaling conversion circuit (6); And this signal received the external trigger end of high-speed collection card, trigger data acquisition, thus realize between phased excitation and data acquisition synchronously.
Phase array transducer (9) ultrasonic waves transmitted becomes electric signal after being received by nautical receiving set (10); Send into high-speed data acquisition card (3); Data are managed through the mode of round-robin queue in high-speed collection card (3); And the dma mode that passes through is regularly sent in the computing machine (1); In computing machine (1), calculate peak-to-peak value through the mode of software, and with the sound pressure amplitude of this peak-to-peak value as acoustical signal, and approximate with the sound field sound pressure amplitude of this sound pressure amplitude as place, nautical receiving set (10) place, center in the transducer radiated sound field.Be depicted as the sound field figure of a two dimension through the sound pressure amplitude of each point, the space sound field acoustic pressure that just can record phase array transducer distributes.
Fig. 2 is the schematic diagram of signaling conversion circuit.
Fig. 3 counts schematic diagram for the sound field scanning comes back production.For improving scanning efficient, the present invention has adopted the scanning round trip all to adopt several methods.As shown in Figure 3, for eliminating site error, in the scanning process, be provided with boost phase and decelerating phase, do not carry out data acquisition in the acceleration and deceleration stage; Only carry out data acquisition in the uniform motion stage of centre, when software was drawn, whether the line number of judging scanning was 2 multiple; If 2 multiple, explanation are positive movements, then put pixel from left to right; Otherwise be counter motion, a pixel of turning left from the right side, and this process that circulates finishes up to scanning.Just can carry out the scanning of phase array transducer sound field efficiently, accurately through above-mentioned processing.
Claims (4)
1. the method for phase array transducer sound field scanning; It is characterized in that: adopt position signalling to trigger phased exciting bank and carry out phased excitation; Utilize the synchronizing signal of the pumping signal of a certain array element simultaneously as high-speed collection card, thus reached between phased excitation and data acquisition synchronously.In the back and forth movement of scanning, all carry out data acquisition, and adopted common data collecting card, through computed in software Voltage Peak peak value as phase array transducer at certain any sound pressure level.
2. the method for phase array transducer sound field according to claim 1 scanning; It is characterized in that: adopt the position of the relative phase array transducer of scrambler card (2) real time record nautical receiving set, adopt numerical digit when putting when what arrive software set, scrambler card (2) can send the TTL signal; This TTL signal is sent on the external trigger interface of phased exciting bank (5); Trigger phased exciting bank excitation phase array transducer emission ultrasound wave, promptly, make that the sound field data are accurate through location triggered.
3. the method for phase array transducer sound field according to claim 1 scanning is characterized in that: in the back and forth movement of scanning axle, all carry out data acquisition, thereby improved scanning efficient; And in motion process, be provided with the acceleration and deceleration stage, do not adopt number in the acceleration and deceleration stage, and only carry out data acquisition, thereby eliminated site error in the middle uniform motion stage.
4. the method for phase array transducer sound field according to claim 1 scanning; It is characterized in that: adopt common high-speed collection card; But not ultrasound detection exclusive data capture card; Through software but not hardware calculates peak-to-peak value, convert peak-to-peak value into color value through self-defining gray scale chart again, thereby draw out the sound field figure of phase array transducer.
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| CN2012101623439A CN102662007A (en) | 2012-05-23 | 2012-05-23 | Phased array ultrasonic transducer sound field scanning method |
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| CN2012101623439A CN102662007A (en) | 2012-05-23 | 2012-05-23 | Phased array ultrasonic transducer sound field scanning method |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103018341A (en) * | 2012-11-29 | 2013-04-03 | 北京理工大学 | High-rigidity three-coordinate scanning frame for scanning sound field of ultrasonic phased array transducer |
| CN103776524A (en) * | 2014-02-21 | 2014-05-07 | 南京大学 | System and method for measuring distribution of strong focused ultrasound nonlinearity sound fields |
| CN105866256A (en) * | 2016-03-30 | 2016-08-17 | 西北工业大学 | Automatic ultrasonic transducer calibrating apparatus |
| CN105973988A (en) * | 2016-07-05 | 2016-09-28 | 方大特钢科技股份有限公司 | Method for detecting ultrasonic three-dimensional imaging of lamellarflaw distribution |
| CN107928709A (en) * | 2017-07-03 | 2018-04-20 | 深圳英美达医疗技术有限公司 | A kind of endoscopic imaging system and its control method |
| CN109520612A (en) * | 2018-11-13 | 2019-03-26 | 上海交通大学 | The burnt system and method for the quick survey of the practical sound field of immersion type focused transducer |
| CN110008897A (en) * | 2019-04-02 | 2019-07-12 | 京东方科技集团股份有限公司 | Ultrasonic sensor pixel circuit and its driving method and display panel |
| CN110487388A (en) * | 2019-08-23 | 2019-11-22 | 中国人民解放军陆军军医大学第一附属医院 | For measurement method and system through cranium stimulating system data test |
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Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103018341A (en) * | 2012-11-29 | 2013-04-03 | 北京理工大学 | High-rigidity three-coordinate scanning frame for scanning sound field of ultrasonic phased array transducer |
| CN103018341B (en) * | 2012-11-29 | 2017-12-12 | 北京理工大学 | A kind of high rigidity three coordinate scanning frame of ultrasonic phased array transducer sound field scanning |
| CN103776524A (en) * | 2014-02-21 | 2014-05-07 | 南京大学 | System and method for measuring distribution of strong focused ultrasound nonlinearity sound fields |
| CN103776524B (en) * | 2014-02-21 | 2016-02-10 | 南京大学 | A kind of method measuring strong focusing ultrasound non-linear sound-filed simulation |
| CN105866256A (en) * | 2016-03-30 | 2016-08-17 | 西北工业大学 | Automatic ultrasonic transducer calibrating apparatus |
| CN105973988A (en) * | 2016-07-05 | 2016-09-28 | 方大特钢科技股份有限公司 | Method for detecting ultrasonic three-dimensional imaging of lamellarflaw distribution |
| CN105973988B (en) * | 2016-07-05 | 2019-08-06 | 方大特钢科技股份有限公司 | A kind of ultrasonic three-dimensional imaging detection method of lamellar defect distribution |
| CN107928709A (en) * | 2017-07-03 | 2018-04-20 | 深圳英美达医疗技术有限公司 | A kind of endoscopic imaging system and its control method |
| CN109520612A (en) * | 2018-11-13 | 2019-03-26 | 上海交通大学 | The burnt system and method for the quick survey of the practical sound field of immersion type focused transducer |
| CN110008897A (en) * | 2019-04-02 | 2019-07-12 | 京东方科技集团股份有限公司 | Ultrasonic sensor pixel circuit and its driving method and display panel |
| CN110008897B (en) * | 2019-04-02 | 2021-04-02 | 京东方科技集团股份有限公司 | Ultrasonic sensor pixel circuit, driving method thereof and display panel |
| CN110487388A (en) * | 2019-08-23 | 2019-11-22 | 中国人民解放军陆军军医大学第一附属医院 | For measurement method and system through cranium stimulating system data test |
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Application publication date: 20120912 |