Landmine multi-modal vibration mode measurement device and method

A measuring device and multi-modal technology, applied in the direction of measuring devices, measuring ultrasonic/sonic/infrasonic waves, instruments, etc., can solve the problems of lacking or not having multi-mode mode shape measuring devices and measuring methods of mines, and achieve non-contact fast and accurate results

Active Publication Date: 2014-08-20
SHANGHAI UNIV
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Problems solved by technology

At present, there are commercial products in the acoustic wave emission system and vibration signal detection system, but they lack the combined use with mine burial devices, mine body vibration detection devices and mine natural frequency detection devices, and there is no professional measurement device for mine multi-mode vibration shapes and measurement method

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  • Landmine multi-modal vibration mode measurement device and method
  • Landmine multi-modal vibration mode measurement device and method
  • Landmine multi-modal vibration mode measurement device and method

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Embodiment Construction

[0033] The preferred embodiments of the present invention are discussed as follows in conjunction with the accompanying drawings:

[0034] see figure 1, a mine multi-mode mode shape measuring device, comprising a signal generator 101, an acoustic emission unit 102, a sound level meter 103, a laser Doppler vibrometer 104, a multi-channel data acquisition card 105, a computer 106 and a mine box 107; The signal generator 101 is connected to the acoustic emission unit 102 by a data line; the sound level meter 103 is connected to the multi-channel data acquisition card 105 and the computer 106 in turn by a data line; the laser Doppler vibrometer 104 sequentially connects the multi-channel data acquisition card 105 and the computer 106 through data lines.

[0035] The signal generator 101 used in this embodiment adopts the AFG3022 arbitrary waveform / function generator produced by Tektronix Company, and the acoustic emission unit 102 adopts the MG8 / 2FX mixer produced by Yamaha Compa...

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Abstract

The invention discloses a landmine multi-modal vibration mode measurement device and method. The landmine multi-modal vibration mode measurement device comprises a signal generator, a sound emission unit, a sound level meter, a laser Doppler vibrometer, a multi-channel data acquisition card, a computer and a caisson, wherein the signal generator is connected with the sound emission unit through a data line; the sound level meter and the laser Doppler vibrometer are sequentially connected with the multi-channel data acquisition card and the computer through data lines; high-intensity and low-frequency sound waves with continuous sweep frequency are emitted out through the signal generator and the sound emission unit, the sound level meter and the laser Doppler vibrometer detect the sound pressure level of the upper end face of a landmine and an amplitude-frequency characteristic curve of the vibration speed respectively, and the multi-order inherent frequency of the landmine is measured out; the signal generator and the sound emission unit emit high-intensity sound wave signals with the inherent frequency of the landmine as the output frequency, and the laser Doppler vibrometer, the multi-channel data acquisition card and the computer detect, display and record a multi-modal vibration mode of the landmine. The landmine multi-modal vibration mode measurement device and method achieve non-contact type rapid and accurate measurement of the multi-modal vibration mode of the landmine.

Description

technical field [0001] The invention relates to the technical field of mine detection, in particular to a mine multi-mode mode shape measurement device and a measurement method, which is a measurement device and method for the mechanical vibration characteristics of landmines in the study of acoustic wave detection of landmines. Background technique [0002] So far, the safe and reliable detection of plastic and other non-metal mines is still a worldwide problem. Conventional metal mine detectors can only detect metal mines based on the principle of electromagnetic induction, and the detection effect on non-metal mines such as plastics with little metal content is very poor. For imaging technologies based on infrared, ground penetrating radar, and X-rays, it is difficult to distinguish whether buried objects are mines or rocks, bricks, or other debris in terms of detection mechanism; for neutron analysis, biological mine detection (such as mine detection bees, mine detection...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01H9/00G01H17/00
Inventor 王驰吴智强张芳曹源丁卫
Owner SHANGHAI UNIV
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