An optical method and device for simultaneously measuring ultrasonic direction, sound intensity and frequency
An optical method and ultrasonic technology, applied in the direction of measuring ultrasonic/sonic/infrasonic waves, measuring devices, using wave/particle radiation, etc., can solve the problems of complex structure of the device, inability to measure ultrasonic propagation direction and frequency at the same time, and achieve low device cost , Data processing is simple and fast, suitable for real-time measurement effect
Inactive Publication Date: 2019-07-12
SOUTH CHINA NORMAL UNIVERSITY
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[0003] The patent application with the application number 201510860847.1 and the title of the invention "an optical method and device and application for measuring ultrasonic sound pressure and sound intensity" is based on the principle of light diffraction, and uses 0-order diffraction to propose a method for measuring sound intensity in water, but The direction and frequency of ultrasonic propagation cannot be measured at the same time, and the structure of the device is relatively complicated
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Embodiment 1
[0066] A device that simultaneously measures the direction, sound intensity and frequency of ultrasonic waves, such as image 3 As shown, it includes the light source 1, the optical fiber 2, the waterproof jacket 3, the fastening coil 4, the lens 5, the waterproof gasket 6, the waterproof gasket 7, the flat glass 8, the fastening coil 9, the hybrid photodiode array detector 10, the driver And scanning amplifier circuit 11, lens holder 12, detector holder 13, waterproof cable 14 and computer 15. The light source 1 is connected to one end of the optical fiber 2; along the direction of the light beam, the light exit port of the optical fiber 2, the lens 5, the plate glass 8, and the hybrid photodiode array detector 10 are arranged in sequence, the light exit port of the optical fiber 2, the lens 5, and the plate glass 8 Coaxially with the hybrid photodiode array detector 10, the hybrid photodiode array detector 10 is arranged on the imaging surface of the lens 5. The driving and sc...
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The invention discloses an optical method and device for simultaneously measuring the direction, the sound intensity and the frequency of ultrasonic waves. The optical method comprises the steps that a dynamic ultrasonic phase grating formed by the ultrasonic waves in a liquid medium is lighted by a laser beam in the direction perpendicular to the propagation direction of the ultrasonic waves, and diffracted light forms a diffraction spectrum of the dynamic ultrasonic phase grating at an image surface of a lens; a hybrid photodiode array detector is arranged at the image surface of the lens, and the occurrence direction of the diffraction spectrum, the level 1 diffracted light intensity and the distance between adjacent diffraction spectrums are recorded; and the propagation direction, the sound intensity and the frequency of the measured ultrasonic waves are acquired through data processing. The optical device comprises a light source, an optical fiber, a lens, a lens base, sheet glass, a hybrid photodiode array detector, a detector base, a driving and scanning amplifying circuit and a computer, and is characterized in that a light emitting port of the optical fiber, the lens, the sheet glass and the detector are sequentially arranged, the detector is arranged on an imaging surface of the lens, and the driving and scanning amplifying circuit is connected with the detector and the computer.
Description
Technical field [0001] The invention belongs to the technical field of optical measurement and metrology, and particularly relates to an optical method and device for simultaneously measuring the direction, sound intensity and frequency of ultrasonic waves. Background technique [0002] Detecting the ultrasonic propagation direction, sound intensity and frequency in liquid has important practical value for underwater sound source positioning and sound source signal quantitative analysis. At present, the positioning device for the propagation direction of the underwater sound source and the small device for measuring the sound intensity are mainly based on electrical and electromagnetic methods, such as moving coil, electrostatic, variable reluctance, magnetostrictive and piezoelectric Equivalent to hydrophone or ultrasonic detector. Ultrasound causes changes in the relevant electrical quantities in the circuit, and then measures the sound pressure or sound intensity based on the...
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IPC IPC(8): G01H9/00
CPCG01H9/00
Inventor 黄佐华熊亮张敬
Owner SOUTH CHINA NORMAL UNIVERSITY