JP2003202218A5 - - Google Patents
Download PDFInfo
- Publication number
- JP2003202218A5 JP2003202218A5 JP2002378310A JP2002378310A JP2003202218A5 JP 2003202218 A5 JP2003202218 A5 JP 2003202218A5 JP 2002378310 A JP2002378310 A JP 2002378310A JP 2002378310 A JP2002378310 A JP 2002378310A JP 2003202218 A5 JP2003202218 A5 JP 2003202218A5
- Authority
- JP
- Japan
- Prior art keywords
- signal
- sensor coil
- subject
- transmission
- reception
- 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.)
- Granted
Links
Claims (2)
所定パルス幅内で周波数および振幅を変化させたチャープ信号を、ピーク間電圧１０００Ｖ pp 以上でセンサコイルの耐圧の許す限り高い電圧以下に増幅し、送信用センサコイルを介して前記被検体に送信し、この被検体より受信用センサコイルを介して得られた受信信号と、前記送信信号と同一または類似の波形の参照信号との相関演算を行い、この相関演算後の受信信号を用いて前記被検体の計測を行うようにしたことを特徴とする電磁超音波計測方法。In an electromagnetic ultrasonic measurement method for generating an ultrasonic wave electromagnetically in a subject using Lorentz force or magnetostriction and detecting the ultrasonic wave to measure the subject,
A chirp signal whose frequency and amplitude are changed within a predetermined pulse width is amplified to a voltage not lower than the peak voltage of 1000 V pp and as high as possible with the withstand voltage of the sensor coil, and transmitted to the subject via the sensor coil for transmission. Then, a correlation calculation is performed between the reception signal obtained from the subject via the reception sensor coil and a reference signal having the same or similar waveform as the transmission signal, and the received signal is obtained using the reception signal after the correlation calculation. An electromagnetic ultrasonic measurement method characterized in that a sample is measured.
前記被検体に磁場をかける外部磁化器、並びに送信用センサコイルおよびこの送信用センサコイルと兼用または別個の受信用センサコイルと、
所定パルス幅内で周波数および振幅を変化させたチャープ信号を数値データとして算出するチャープ信号算出手段と、
前記チャープ信号算出手段の算出したチャープ信号を、送信信号、参照信号としてそれぞれ記憶する送信信号記憶手段および参照信号記憶手段と、
前記送信信号記憶手段に記憶された送信信号を読出しアナログ信号に変換するＤ／Ａ変換手段と、
前記Ｄ／Ａ変換手段の出力するアナログ信号をピーク間電圧１０００Ｖ pp 以上でセンサコイルの耐圧の許す限り高い電圧以下に、電力増幅して前記送信用センサコイルに印加する電力増幅手段と、
前記受信用センサコイルが得た受信信号を増幅する受信増幅手段と、
前記受信増幅手段の増幅した受信信号を数値データに変換するＡ／Ｄ変換手段と、
前記Ａ／Ｄ変換手段の出力する数値データと、前記参照信号記憶手段から読出した参照信号との相関演算を行う相関演算手段とを備えたことを特徴とする電磁超音波計測装置。In an electromagnetic ultrasonic measurement apparatus that generates an ultrasonic wave electromagnetically in a subject using Lorentz force or magnetostriction and detects the ultrasonic wave to measure the subject,
An external magnetizer that applies a magnetic field to the subject, a transmission sensor coil, and a reception sensor coil that is also used as or separate from the transmission sensor coil;
Chirp signal calculation means for calculating a chirp signal whose frequency and amplitude are changed within a predetermined pulse width as numerical data;
A transmission signal storage means and a reference signal storage means for storing the chirp signal calculated by the chirp signal calculation means as a transmission signal and a reference signal, respectively;
D / A conversion means for reading and converting the transmission signal stored in the transmission signal storage means into an analog signal;
A power amplifying means for amplifying the analog signal output from the D / A converting means at a peak- to- peak voltage of 1000 V pp or higher and lower than the allowable voltage of the sensor coil and applying it to the transmitting sensor coil;
Receiving amplification means for amplifying the received signal obtained by the receiving sensor coil;
A / D conversion means for converting the reception signal amplified by the reception amplification means into numerical data;
An electromagnetic ultrasonic measurement apparatus, comprising: correlation calculation means for performing correlation calculation between the numerical data output from the A / D conversion means and the reference signal read from the reference signal storage means.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2002378310A JP4334215B2 (en) | 2002-12-26 | 2002-12-26 | Electromagnetic ultrasonic measurement method and apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2002378310A JP4334215B2 (en) | 2002-12-26 | 2002-12-26 | Electromagnetic ultrasonic measurement method and apparatus |
Related Parent Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP31185997A Division JP3575252B2 (en) | 1997-11-13 | 1997-11-13 | Electromagnetic ultrasonic measurement method and apparatus |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| JP2003202218A JP2003202218A (en) | 2003-07-18 |
| JP2003202218A5 true JP2003202218A5 (en) | 2005-06-23 |
| JP4334215B2 JP4334215B2 (en) | 2009-09-30 |
Family
ID=27656022
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2002378310A Expired - Fee Related JP4334215B2 (en) | 2002-12-26 | 2002-12-26 | Electromagnetic ultrasonic measurement method and apparatus |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP4334215B2 (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2598777C1 (en) * | 2013-01-22 | 2016-09-27 | Ниппон Стил Энд Сумитомо Метал Корпорейшн | Method for correction of position of the defect |
| US10605789B2 (en) * | 2017-02-23 | 2020-03-31 | Southern Research Institute | Ultrasonic inspection system employing spectral and time domain processing of ultrasonic signal |
| CN113311073B (en) * | 2021-04-21 | 2022-12-02 | 武汉科技大学 | Electromagnetic ultrasonic sound time measuring method and system |
-
2002
- 2002-12-26 JP JP2002378310A patent/JP4334215B2/en not_active Expired - Fee Related
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| EP2661329B1 (en) | Improvements in or relating to ultrasound generating apparatus, and methods for generating ultrasound | |
| CN103486960B (en) | A kind of ultrasound wave, eddy current and EMAT integration nondestructive thickness measuring instrument and method thereof | |
| US9201048B2 (en) | Systems for characterizing resonance behavior of magnetostrictive resonators | |
| NO20083176L (en) | Method and equipment for non-destructive testing of metallic workpieces | |
| JP2014503072A5 (en) | ||
| CN101545755A (en) | Ferromagnet magnetostrictive effect-based method for testing length of anchor rod | |
| CN102520068A (en) | Rail destruction detection device and method based on magnetostriction and longitudinal ultrasonic guided wave | |
| CN1908649B (en) | Concrete structure tomographic imaging detection system | |
| CN101828129A (en) | Ultrasonic wave propagation time measuring system | |
| CN202421133U (en) | Railway track damage detection device based on magnetostriction and longitudinal ultrasonic guided waves | |
| CN109060206A (en) | A kind of ferrimagnet stress measurement device and method | |
| CN110471010B (en) | SH of magnetostriction curve of ferromagnetic material0Modal ultrasonic guided wave measuring method | |
| CN104013388B (en) | Based on the excitation of magnetosonic coupling imaging and detection method and the device of low frequency and continuous ripple | |
| CN104897779B (en) | Utilize the method for linear FM signal Measuring Propagation Time of Ultrasonic Wave | |
| CN202075264U (en) | Ultrasonic sensor for ultrasonic pile foundation detection | |
| JP2003202218A5 (en) | ||
| CN204594436U (en) | A kind of device of ultrasonic thickness measurement | |
| JP3608423B2 (en) | Electromagnetic ultrasonic measurement method and apparatus | |
| CN100449254C (en) | Electromechanical detection method of non-metallic material thickness | |
| CN107860465B (en) | Method for detecting inherent frequency of magnetostrictive guided wave longitudinal wave pipeline | |
| Kang et al. | Low-power EMAT measurements for wall thickness monitoring | |
| CN102590356A (en) | Device for measuring sensitivity of acoustic emission sensor | |
| RU2444009C1 (en) | Method for ultrasonic inspection | |
| CN112526600B (en) | Amplitude compensation method and system for sweep frequency ultrasonic excitation signal | |
| Kim et al. | Bipolar pulse generator for very high frequency (> 100 MHz) ultrasound applications |