CN102590356A - Device for measuring sensitivity of acoustic emission sensor - Google Patents
Device for measuring sensitivity of acoustic emission sensor Download PDFInfo
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- CN102590356A CN102590356A CN2012100114183A CN201210011418A CN102590356A CN 102590356 A CN102590356 A CN 102590356A CN 2012100114183 A CN2012100114183 A CN 2012100114183A CN 201210011418 A CN201210011418 A CN 201210011418A CN 102590356 A CN102590356 A CN 102590356A
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Abstract
The invention relates to a device for measuring the sensitivity of an acoustic emission sensor. The device comprises an acoustic source excitation device, a sensor coupling device and a signal acquiring device, wherein the acoustic source excitation device comprises an any wave form generating card and an attenuator; the sensor coupling device comprises a source energy converter, a standard sensor and a sensor to be measured; and the signal acquiring device uses a signal amplifier and a signal acquiring card. A signal transmitted by the any wave form generating card is highly repeatable and reliable. By the structure of the measurement device, the sensitivity of the acoustic emission sensor can be measured well. The device has the characteristics of simplicity in operation and accurate result.
Description
One, technical field
The present invention has designed a kind of measurement mechanism that is applicable to calibrate AE sensor.This device can be realized the measurement of calibrate AE sensor sensitivity.
Two, background technology
Acoustic emission testing technology is one of important detection means in Non-Destructive Testing field.And the calibrate AE sensor of paramount importance ingredient that is acoustic emission detection system, its performance is directly determining the validity and the accuracy of acoustic emission detection.For improving acoustic emission detection result's reliability, before acoustic emission detection, need carry out sensitivity measure, to judge whether coincidence detection requirement to calibrate AE sensor.
The measuring technique of the calibrate AE sensor sensitivity that present stage exists comprises reciprocity technique, vibration measurement with laser technology, surperficial pulse work.Reciprocity technique is high to the reciprocity parameter request of sensor, and experiments of measuring is more loaded down with trivial details.The vibration measurement with laser technology is high to environmental requirement, and expense is expensive, should not in industry, promote.The impulse source operation that the surface pulse work is used acquires a certain degree of difficulty, and signal repeatability is relatively poor.Therefore how the sound source that design operation is simple, repeatability is good, and the sensitivity of how measuring calibrate AE sensor through simple measuring system is the problem that a lot of R&D institution and factory is concerned about.
Three, summary of the invention
The present invention has designed a kind of measurement mechanism of calibrate AE sensor sensitivity.Simple to operate during this measurement device calibrate AE sensor sensitivity, and can guarantee the reliability of measurement result.
The present invention is achieved in that random waveform card takes place produces stable signal; The frequency range of program control signal and voltage; Excitation sound source transducer after the attenuator decay; Respectively by standard acoustic emission sensor and calibrate AE sensor to be measured and the coupling of sound source transducer, the signal of calibrate AE sensor after prime amplifier amplifies by signals collecting and processing.The reliability that is coupled between calibrate AE sensor and sound source transducer is guaranteed by anchor clamps.
Four, description of drawings
Figure calibrate AE sensor sensitivity measuring apparatus
Card 3-attenuator 4-source transducer 5-couplant takes place in 1-industrial computer 2-random waveform
6-standard transducer (sensor to be measured) 7-signal amplifier 8-data acquisition card
Five, embodiment
Following specific embodiments of the invention is elaborated:
Following specific embodiments of the invention is elaborated:
Fig. 1 is the measurement mechanism of calibrate AE sensor sensitivity, comprises that random waveform is blocked, attenuator, sound source transducer, standard acoustic emission sensor, calibrate AE sensor to be measured, signal amplifier and data acquisition card.
Measure calibrate AE sensor sensitivity, must measure standard transducer and signal of sensor to be measured respectively.
The as shown in the figure connection; Random waveform is taken place the output terminal of card; Be connected to the input end of attenuator, the output terminal of attenuator is connected to the source transducer, makes the coupling of standard transducer and source transducer; The output of standard acoustic emission sensor is connected to the input end of prime amplifier, and the output signal of prime amplifier is sent into the capture card input port.
Operating measurement software, the Controlling Source transducer produces acoustic emission wave, the control capture card collection standard acoustic emission sensor output voltage waveform of this moment after amplifying.Then; Change the standard acoustic emission sensor into sensor to be measured; Operating measurement software; Measure the output voltage waveforms of calibrate AE sensor to be measured after amplifying, computer software calculates the sensitivity of calibrate AE sensor to be measured according to this two voltage waveform and known standard acoustic emission transducer sensitivity.
Claims (5)
1. calibrate AE sensor sensitivity measuring apparatus principle of work: by random waveform card takes place and produce stable electric signal; The excitation transducer produces sound source behind attenuator; Respectively with standard acoustic emission sensor and calibrate AE sensor to be measured and the coupling of sound source transducer; Measure its output voltage signal after amplifying, 2 signals and known standard acoustic emission transducer sensitivity calculate the sensitivity of sensor to be measured in view of the above then.
2. calibrate AE sensor sensitivity measuring apparatus according to claim 1; It is characterized in that: sound-source signal has stable repeatability; Calibrate AE sensor and sound source transducer directly are coupled; When testing, only need to measure the output signal of a standard transducer, measure each signal of sensor to be measured subsequently and get final product with a series of calibrate AE sensors.
3. the measurement mechanism of the described calibrate AE sensor sensitivity of claim 1; For realizing the repeatability and the reliability of sound source; Card takes place as the acoustical signal source in the random waveform that adopts device, adopts ultrasonic transducer as electro-acoustic conversion device, the acoustical signal good reproducibility that excites.
4. the measurement mechanism of the described calibrate AE sensor sensitivity of claim 1 for realizing the good coupling of source transducer and sensor to be measured, is selected and the similar source transducer of sensor to be measured bottom surface diameter.
5. the measurement mechanism of calibrate AE sensor sensitivity according to claim 1, prime amplifier provides power supply by capture card.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012100114183A CN102590356A (en) | 2012-01-16 | 2012-01-16 | Device for measuring sensitivity of acoustic emission sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012100114183A CN102590356A (en) | 2012-01-16 | 2012-01-16 | Device for measuring sensitivity of acoustic emission sensor |
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| CN102590356A true CN102590356A (en) | 2012-07-18 |
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| CN2012100114183A Pending CN102590356A (en) | 2012-01-16 | 2012-01-16 | Device for measuring sensitivity of acoustic emission sensor |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108037507A (en) * | 2017-11-16 | 2018-05-15 | 中南大学 | A kind of ultrasonic mima type microrelief detection system being used under deep-sea mining reverberant ambiance |
| CN108776238A (en) * | 2018-07-27 | 2018-11-09 | 中科传启（苏州）科技有限公司 | Ultrasonic wind velocity indicator transducer performance degradation mode detection method |
| CN109270172A (en) * | 2018-09-13 | 2019-01-25 | 中南大学 | Verify the method and device of ultrasonic water immersion piezoelectric probe |
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| JP2008292385A (en) * | 2007-05-28 | 2008-12-04 | Jfe Engineering Kk | Sensitivity correcting method in ultrasonic inspection |
| RU2381498C1 (en) * | 2008-10-31 | 2010-02-10 | Закрытое акционерное общество фирма "СИГМА-ОПТИК ЛТД" | Calibration method for acoustic emission detectors and device for implementation thereof |
| CN102095805A (en) * | 2009-12-09 | 2011-06-15 | 中国计量科学研究院 | System and method for testing acoustic emission sensor based on laser Doppler principle |
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2012
- 2012-01-16 CN CN2012100114183A patent/CN102590356A/en active Pending
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| CN2847288Y (en) * | 2005-11-17 | 2006-12-13 | 唐开伟 | Ultrasonic probe capable of regulating coupling layer distance |
| JP2008292385A (en) * | 2007-05-28 | 2008-12-04 | Jfe Engineering Kk | Sensitivity correcting method in ultrasonic inspection |
| RU2381498C1 (en) * | 2008-10-31 | 2010-02-10 | Закрытое акционерное общество фирма "СИГМА-ОПТИК ЛТД" | Calibration method for acoustic emission detectors and device for implementation thereof |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108037507A (en) * | 2017-11-16 | 2018-05-15 | 中南大学 | A kind of ultrasonic mima type microrelief detection system being used under deep-sea mining reverberant ambiance |
| CN108776238A (en) * | 2018-07-27 | 2018-11-09 | 中科传启（苏州）科技有限公司 | Ultrasonic wind velocity indicator transducer performance degradation mode detection method |
| CN108776238B (en) * | 2018-07-27 | 2020-08-14 | 中科传启（苏州）科技有限公司 | Ultrasonic anemometer transducer performance deterioration state detection method |
| CN109270172A (en) * | 2018-09-13 | 2019-01-25 | 中南大学 | Verify the method and device of ultrasonic water immersion piezoelectric probe |
| CN109270172B (en) * | 2018-09-13 | 2020-04-28 | 中南大学 | Method and device for verifying ultrasonic water immersion piezoelectric probe |
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Application publication date: 20120718 |