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Landmine inherent frequency acousto-optic measurement device and method

A technology of natural frequency and measurement device, applied in measurement device, measurement of ultrasonic/sonic/infrasonic waves, instruments, etc., can solve the problem of low reflectivity, lack of combined use of mine burying devices, difficult ground vibration, high sensitivity, and effective non-contact detection. and other problems to achieve the effect of improving the sensitivity

Active Publication Date: 2013-04-03
SHANGHAI UNIV
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Problems solved by technology

At present, there are commercial products in the acoustic wave emission system, but there is a lack of combined use of landmine burying devices; there are special equipment in the vibration signal detection system, but the reflectivity of the detection beam incident on the ground is low, and it is difficult to carry out high ground vibration detection. Sensitive, effective non-contact detection

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  • Landmine inherent frequency acousto-optic measurement device and method
  • Landmine inherent frequency acousto-optic measurement device and method

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Embodiment Construction

[0022] Preferred embodiments of the present invention are discussed as follows in conjunction with the accompanying drawings:

[0023] see figure 1 , an acousto-optic measuring device for the natural frequency of a mine, comprising a signal generator 101, an acoustic wave emission system 102, a laser Doppler vibrometer 103, a data acquisition card 104, a computer 105, a mine box 106, a soil sample 107 and a small reflector 108, the signal generator 101 is connected to the acoustic wave emission system 102 through wires, the laser Doppler vibrometer 103 is connected to the data acquisition card 104 and the computer 105 through data lines in turn, and the soil sample 107 is loaded with Put into the mine box 106, place the small reflector 108 on the soil sample 107 packed in the mine box 106.

[0024] see figure 1 with figure 2 , a kind of acousto-optic measuring method of natural frequency of landmine, adopt above-mentioned measuring device, the specific implementation steps...

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Abstract

The invention discloses a landmine inherent frequency acousto-optic measurement device and method. The landmine inherent frequency acousto-optic measurement device comprises a signal generator, a sound wave emission system, a laser Doppler vibrometer, a data collection card, a computer, a landmine box, a soil sample and a small reflector, wherein the signal generator is connected with the sound wave emission system through a lead wire; the laser Doppler vibrometer is sequentially connected with the data collection card and the computer through a data line; the soil sample is placed in the landmine box; and the small reflector is placed on the soil sample placed in the landmine box. The signal generator emits continuous frequency sweeping low-frequency sound waves, vibration signals on the small reflector are detected through the laser Doppler vibrometer, amplitude-versus-frequency curves of the vibration signals with and without landmine sample burying are obtained, and the landmine inherent frequency is obtained in a ratio solving method. The landmine inherent frequency acousto-optic measurement device and method can achieve non-contact, fast and accurate measurement of the landmine inherent frequency.

Description

technical field [0001] The invention relates to the technical field of landmine detection, in particular to an acousto-optic detection device and method for the mechanical characteristics of non-metallic landmines. Background technique [0002] The safe and reliable detection of non-metallic mines has always been a bottleneck in the world. Commonly used metal detectors can only detect metal landmines because they are based on the principle of electromagnetic induction, and have poor detection effects on non-metal mines such as plastics with little metal content. For imaging technologies such as infrared, ground penetrating radar, and X-ray, it is difficult to distinguish the type of buried objects in terms of detection mechanism; for non-imaging technologies, such as neutron analysis, it has a strong ability to identify by detecting the chemical properties of materials, but the system It is particularly complicated and the detection signal is too weak, and it is still in th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01H9/00
Inventor 王驰周瑜秋沈高炜吴文雯丁卫
Owner SHANGHAI UNIV
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