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Low-strain fixed-point constant-energy hammer vibration excitation device and vibration excitation method for elastic wave measurement

A hammer-excited vibration and low-strain technology, which is applied in the generation of ultrasonic/sonic/infrasonic waves, analysis of materials, instruments, etc., can solve the problems of inability and precise hammering of hammering devices

Active Publication Date: 2020-06-30
ZHEJIANG SCI-TECH UNIV
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Problems solved by technology

[0003] The invention provides a low-strain fixed-point constant-energy hammer vibration excitation device capable of precise hammering for elastic wave measurement, which solves the problem that the adopted hammering device cannot perform precise hammering

Method used

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  • Low-strain fixed-point constant-energy hammer vibration excitation device and vibration excitation method for elastic wave measurement
  • Low-strain fixed-point constant-energy hammer vibration excitation device and vibration excitation method for elastic wave measurement
  • Low-strain fixed-point constant-energy hammer vibration excitation device and vibration excitation method for elastic wave measurement

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Embodiment Construction

[0030] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0031] see figure 1 , figure 2 , image 3 , Figure 4 , Figure 5 and Image 6 , a low-strain fixed-point constant-energy hammer vibration excitation device for elastic wave measurement, including a base 1 , a hammer handle 2 and a cable 3 .

[0032] The base 1 includes a base part 11 , a front frame 12 located at the front end of the base part, and a pressing and fixing plate 13 located at the rear end of the base part. A hammer point aiming frame 15 is movably connected front and rear on the front frame 12 . The front frame 12 is provided with a plurality of tension spring connecting holes 121 distributed along the front and rear directions. One end of the hammer handle 2 is hinged on the base part 11 through a hinge shaft 21 .

[0033] The other end of the hammer handle 2 is connected with a hammer head 4 . Hammer handle 2 is also connected...

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Abstract

The invention relates to the field of low-strain non-destructive testing. A low-strain fixed-point constant-energy hammer vibration excitation device for elastic wave measurement, comprising a base, a hammer handle and a cable, one end of the hammer handle is hinged to the base through a hinge shaft, and the other end is connected to a hammer head. The base is provided with a hammer point aiming frame and a release device, the hammer point aiming frame and the hammer head are located on the same cylindrical surface with the rotation axis as the center line, and the hammer handle also drives the hammer head toward the hammer The tension spring that swings the aiming frame at the hitting point is connected with the base, one end of the drag cable is fixed with the hammer handle, and the other end is provided with a blocking block matched with the releaser. The invention provides a low-strain fixed-point constant-energy hammer vibration excitation device capable of precise hammering for elastic wave measurement, which solves the problem that the adopted hammering device cannot perform precise hammering.

Description

technical field [0001] The invention relates to the field of low-strain non-destructive testing, in particular to a low-strain fixed-point constant-energy hammer vibration excitation device and vibration excitation method for elastic wave measurement. Background technique [0002] When carrying out low-strain non-destructive testing, tools such as hand hammers and force hammers are generally used to excite vibrations. However, due to individual differences between testers and equipment during the hammering process, it is difficult to accurately control the hammering energy and hammering position. , leading to a certain degree of randomness in the test results. In some occasions where accurate measurement of wave velocity is required, such as using elastic wave velocity for stress state diagnosis of stressed components, the error caused by random factors of hammering will be very large. Contents of the invention [0003] The invention provides a low-strain fixed-point cons...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N29/34
CPCG01N29/34G01N2291/023
Inventor 俞峰杨予杨博吴希
Owner ZHEJIANG SCI-TECH UNIV
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