Mine-used large-range fiber grating passive roof bed separation sensor

A fiber grating and passive top plate technology, applied in the direction of optical devices, instruments, measuring devices, etc., can solve the problems of poor data transmission capability, poor anti-interference ability, mine safety monitoring is not in place, etc., to achieve large range and high precision Effect

CN109631791APending Publication Date: 2019-04-16山东道宽智能科技有限公司 +1
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
Publication Date
2019-04-16

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Abstract

The invention discloses a mine-used large-range fiber grating passive roof bed separation sensor, which comprises a shell, a wire rope roller mechanism and a fiber grating strain mechanism, and is characterized in that the fiber grating strain mechanism comprises a second gear, a precision screw rod with one end fixed with the second gear and rotating along with the second gear, a bevel slider with a bevel surface, a strain gauge fixing square block, and a fiber grating strain gauge, wherein the bevel slider sleeves the precision screw rod and can axially move along the screw rod; the strain gauge fixing square block is fixed on a front bearing support frame, and the position of the strain gauge fixing square block is corresponding to that of the bevel slider; and one end of the fiber grating strain gauge is fixed by the strain gauge fixing square block and the other end is a free end contacted with the bevel surface of the bevel slider and capable of sliding relatively, and a fiber grating is attached to the fiber grating strain gauge. The circular motion of the roller pulled by the wire rope changes to the axial motion of the bevel slider on the precision rod, the wavelength of the fiber grating changes, and real-time online dynamic roof bed separation monitoring can be realized.
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Description

technical field

[0001] The invention relates to the technical field of coal mine safety detection, in particular to a mine-used large-range optical fiber grating passive roof separation sensor. Background technique

[0002] Optical fiber sensing technology is a new science and technology, and it is also an important technical foundation of the information society, occupying a very important position in contemporary high technology. Optical fiber sensing technology was established rapidly with the emergence of optical fiber communication technology in the 1970s. By using light waves as a carrier and optical fiber as a medium, it is a new sensing technology with perception and signal transmission. The light wave as the carrier of the measured signal and the optical fiber as the light wave propagation medium have a series of unique advantages that are difficult to compare with other carriers and media.

[0003] In the process of monitoring the mine pressure, due to various obj...

Examples

Embodiment Construction

[0028] The technical solutions of the present invention will be described in detail below in conjunction with the accompanying drawings and embodiments.

[0029] A mine-used large-range optical fiber grating passive roof separation sensor includes a shell, a wire rope roller mechanism, and an optical fiber grating strain mechanism.

[0030] refer to figure 1 and figure 2 , the housing 5 of the sensor body includes three support frames, a front bearing support frame 6, an intermediate bearing support frame 7, and a rear bearing support frame 8, which are mainly used to fix the internal structure of the sensor.

[0031] The wire rope roller mechanism includes a first gear 3, and the fiber grating strain mechanism includes a second gear 4, a precision lead screw 10 that is fixed at one end to the second gear and rotates with the second gear; an inclined-plane slide block 11 is provided with an inclined plane, and the inclined-plane slide block 11 is set on the precision screw ...