Acoustic-to-seismic coupling optimal incidence angle measuring apparatus and measuring method thereof
A technology for measuring devices and incident angles, which can be used in measuring devices, geophysical surveys, seismology, etc., and can solve problems such as the lack of convenient incident angle adjustment mechanisms
Active Publication Date: 2012-07-18
SHANGHAI UNIV
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[0005] The purpose of the present invention is to overcome the problem that there is no high-precision acoustic-seismic coupling optimal incident angle measurement device, especially the lack of a convenient incident angle adjustment mechanism, and provide an acoustic-seismic coupling optimal incident angle measurement device and measurement method. It is a device and method for measuring the influence of the incident angle of the sound wave reaching the ground on the surface vibration excited by the sound wave, which can realize accurate and fast measurement of the optimal incident angle of the acoustic-seismic coupling
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[0023] Preferred embodiments of the present invention are discussed as follows in conjunction with the accompanying drawings:
[0024] Such as figure 1 As shown, an acoustic-seismic coupling optimal incident angle measurement device includes a signal generator 101, a mixing console 102, a power amplifier 103, a speaker 104, a speaker card slot 105, and an incident angle adjustment mechanism 108. The signal generator 101 connects the mixer 102, the power amplifier 103 and the speaker 104 in turn through wires, the speaker 104 is fixedly stuck in the speaker slot 105, and the speaker slot 105 is fixed by lengthening the iron plate 106 And two bolts 107 are fixed on the described incident angle adjusting mechanism 108, constitute the sound wave emission system; This device also comprises geophone 111, data acquisition card 112 and computer 113, and described geophone 111 passes data line through institute The data acquisition card 112 is connected with the computer 113 to form a...
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The invention discloses an acoustic-to-seismic coupling optimal incidence angle measuring apparatus which comprises a sound wave emitting system formed by a signal generator, a sound console, a power amplifier, a loudspeaker, a loudspeaker clamping groove and an incidence angle adjusting mechanism. The apparatus also comprises an earth surface vibration speed detection system which is formed by a seismic geophone, a data collection card and a computer. The invention provides an acoustic-to-seismic coupling optimal incidence angle measuring method, and the above measuring apparatus is employed. The method comprises the following implementation steps: (1) detecting earth surface vibration speed when an angle of a central axis of a loudspeaker sounding port relative to a vertical direction is 0 degree, 5 degrees, 15 degrees, 20 degrees, 25 degrees, 30 degrees, 35 degrees, 40 degrees and 45 degrees; (2) searching a maximum value of the earth surface vibration speed measured in the above step, wherein an angle corresponding to the maximum value is a measured acoustic-to-seismic coupling optimal incidence angle. According to the measuring apparatus and the measuring method of the invention, high-precision and rapid measurement of the acoustic-to-seismic coupling optimal incidence angle can be realized.
Description
technical field [0001] The invention relates to an acoustic-seismic coupling optimal incident angle measurement device and a measurement method, which belong to the technical field of acoustic-seismic coupling. Background technique [0002] So far, there is no complete theoretical system about the acoustic-seismic coupling phenomenon, and the research on the acoustic-seismic coupling mechanism is still a worldwide problem. Acoustic-seismic coupling refers to that when low-frequency sound waves below 1 kHz are incident on the ground from the air, most of the energy is reflected back to the air, but some energy is coupled to the ground and has momentum and viscous friction with the soil, forming slow longitudinal waves, Seismic waves with multiple components such as fast longitudinal waves and shear waves cause vibrations on the ground surface. [0003] Acoustic-seismic coupling phenomena have potential applications in the safe and reliable detection of shallow buried objects...
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IPC IPC(8): G01V1/00G01C1/00
Inventor 王驰丁卫沈高炜周瑜秋于瀛洁
Owner SHANGHAI UNIV