Damping adjustable all-fiber acceleration microseism monitoring sensor probe

A technology of sensor probes and sensor probes, applied in seismic signal receivers, instruments, measuring devices, etc., can solve the problems of inapplicability and complex structures of magnetic objects such as hysteresis coils, and achieve flat frequency response curves, high sensitivity, The effect of a large dynamic range

Active Publication Date: 2019-09-20
ANHUI UNIVERSITY
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are complex structures, and magnetic objects such as hysteresis coils are not suitable for high electromagnetic environments in coal mines.

Method used

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  • Damping adjustable all-fiber acceleration microseism monitoring sensor probe
  • Damping adjustable all-fiber acceleration microseism monitoring sensor probe
  • Damping adjustable all-fiber acceleration microseism monitoring sensor probe

Examples

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Comparison scheme
Effect test

Embodiment 1

[0029] see Figure 1 to Figure 7 , a damping adjustable all-fiber-optic acceleration microseismic monitoring sensor probe disclosed in the present invention, the sensing probe 3 used to pick up the microseismic signal consists of a cylindrical sensing probe shell 301, a sensing probe top cover 309, and a sensing probe located at the The sensing arm elastic body 307, the damping adjustment device, the reference arm elastic body 302 and the fiber optic coupler 2, which are concentric with the sensing probe housing 301 and fixedly connected upwards from the bottom of the sensing probe housing 301, are connected by the sensing probe top The optical fiber inlet 308 provided with the cover 309 introduces the incident optical fiber 201 and the reflecting optical fiber 202 connected to the optical fiber coupler 2 into the sensing probe 3, the reference arm optical fiber 204 and the sensing arm optical fiber 205 drawn out by the optical fiber coupler 2, the reference The arm mirror 203...

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Abstract

The invention relates to a damping adjustable all-fiber acceleration microseism monitoring sensor probe, and belongs to the technical field of fiber sensing and microseism monitoring. The sensor probe comprises a sensing probe housing, a reference arm elastomer, a sensing arm elastomer, a mass block pedestal, an adjusting nut, a damping ring and a sensing probe top cover; incident, reflecting, reference-arm and sensing-arm fibers connected with a fiber coupler, a reference arm reflector and a sensing arm reflector form a complete sensing optical path; and a laser source is transmitted to a sensing probe, pilot light and reference light with seismic information in the sensing probe are interfered in the fiber coupler, the interfered light is transmitted to a signal demodulator via the reflecting fiber, and a microseism signal to be measured is recovered. High sensitivity of the sensor is intruded, a damping adjustable technology is introduced, the sensitivity of the sensor in the resonant frequency is reduced, a frequency response curve is smoother, the detection bandwidth is broadened, the amplitude-frequency and phase-frequency characteristics are improved, and the microseism signal can be obtained without loss.

Description

technical field [0001] The invention relates to the technical field of optical fiber sensing and microseismic monitoring, in particular to a damping-adjustable all-fiber-optic acceleration microseismic monitoring sensor probe. Background technique [0002] With the continuous development of optoelectronic technology and optical fiber technology, the optical fiber communication technology with optical fiber as the transmission element and the optical fiber sensing technology with optical fiber as the sensitive element have developed rapidly. Fiber optic sensors used to measure physical quantities such as acceleration, displacement, and stress are increasingly emerging. Compared with traditional piezoelectric and ultrasonic sensors, fiber optic sensors have significant advantages: light weight, small size; large dynamic range, wide operating frequency band; passive , Anti-electromagnetic interference, can be used in harsh environments such as high temperature and high pressure...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01V1/18G01H9/00
CPCG01H9/004G01V1/18
Inventor 俞本立葛强吴许强李世丽时金辉张刚
Owner ANHUI UNIVERSITY
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