Laser ultrasonic modulus measuring device
A technology of laser ultrasound and measuring devices, which is applied in the field of measurement, can solve the problems of limitations and certain difficulties in detection, achieve high positioning accuracy modulus measurement, and avoid the effect of material surface damage
Pending Publication Date: 2019-09-10
STATE POWER INVESTMENT CORP RES INST +1
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Problems solved by technology
[0003] However, the existing testing is limited to non-destructive testing on the one hand, and has strict requirements on the shape and size of the sample, such as the detection of small-sized samples (the sample size is much smaller than the piezoelectric probe), irregular-shaped (such as curved surface) samples, etc. with a certain degree of difficulty
Therefore, the application of laser ultrasonic testing technology has certain limitations.
Method used
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[0026] Exemplary embodiments of the present invention will be described in detail below with reference to the accompanying drawings, wherein the same or similar reference numerals represent the same or similar elements. In addition, in the following detailed description, for purposes of explanation, numerous specific details are set forth in order to provide a comprehensive understanding of the embodiments of the present disclosure. It may be evident, however, that one or more embodiments may be practiced without these specific details. In other instances, well-known structures and devices are shown in diagrammatic form to simplify the drawings.
[0027] The application of laser ultrasonic measurement in the field of materials includes nondestructive testing of materials or modulus measurement research. The echo method can be used to measure the propagation time of ultrasonic waves in the sample. The specific principles are as follows: figure 1 shown. The high-frequency puls...
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Abstract
The invention provides a laser ultrasonic modulus measuring device, used for measuring the modulus of a material. The laser ultrasonic modulus measuring device includes a test micro-region amplification and imaging device; and the laser ultrasonic modulus measuring device comprises a laser ultrasonic exciter and a laser ultrasonic receiver; the laser ultrasonic exciter is configured to emit a pulsed laser to the material, and the laser ultrasonic receiver is configured to emit a detection laser; furthermore, the laser ultrasonic modulus measuring device includes a first optical path and a second optical path branched from the first optical path; and the test micro-region amplification and imaging device includes an objective lens and a camera. According to the laser ultrasonic modulus measuring device provided by the invention, the modulus detection of the material can be performed, and the requirements of the shape and size of the material are low.
Description
technical field [0001] The present invention relates to the field of measurement technology, in particular to a laser ultrasonic modulus measurement device, that is, a device for realizing modulus measurement based on the laser ultrasonic principle, especially a device for micro-area modulus measurement. Background technique [0002] In recent years, attention to laser ultrasonic testing technology has been increasing, and laser ultrasonic testing technology can be used for non-destructive testing of materials in aviation, aerospace, nuclear power and other fields. In China, Tongji University, Beijing University of Technology, AVIC 301 Failure Analysis and Testing Center, National University of Defense Technology and other non-destructive testing related research centers have established laser ultrasonic testing systems for non-destructive testing of materials. [0003] However, the existing testing is limited to non-destructive testing on the one hand, and has strict requir...
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IPC IPC(8): G01N29/06G01N29/07G01N29/22G01N29/24G01N21/45G01N21/01
CPCG01N29/06G01N29/0654G01N29/069G01N29/07G01N29/22G01N29/24G01N21/45G01N21/01G01N2021/0112
Inventor 王婉琳孔淑妍燕鹏马雪虞楠李高盛夏海鸿李怀林
Owner STATE POWER INVESTMENT CORP RES INST