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Measuring device and method for multi-mode mode shape of landmine

A measurement method and technology of measurement device, applied in measurement device, measurement of ultrasonic/sonic/infrasonic waves, instruments, etc., can solve the problem of lack or absence of multi-mode mode shape measurement device and measurement method of mines, etc., and achieve non-contact rapid accurate effect

Active Publication Date: 2016-04-27
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

Method used

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  • Measuring device and method for multi-mode mode shape of landmine
  • Measuring device and method for multi-mode mode shape of landmine
  • Measuring device and method for multi-mode mode shape of landmine

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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 Comp...

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Abstract

The invention relates to a measuring device and method for multi-mode mode shapes of landmines, comprising a signal generator, an acoustic emission unit, a sound level meter, a laser Doppler vibrometer, a multi-channel data acquisition card, a computer and a mine box; The sound level meter and the laser Doppler vibrometer are respectively connected to the multi-channel data acquisition card and the computer in turn through the data line; the continuous sweeping high-intensity low-frequency sound waves are emitted by the signal generator and the acoustic emission unit , and the amplitude-frequency characteristic curves of the sound pressure level and the vibration velocity of the upper surface of the mine are detected by the sound level meter and the laser Doppler vibrometer respectively, and the multi-order natural frequencies of the mine are measured; The natural frequency of the mine is a high-intensity acoustic signal at the output frequency, and the multi-mode mode shape of the mine is detected, displayed, and recorded by a laser Doppler vibrometer, a multi-channel data acquisition card and a computer. The invention realizes non-contact rapid and accurate measurement of multi-mode vibration shapes of mines.

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 Patents(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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