阅读说明：本技术 一种基于光纤光栅的应变式顶板离层传感器 (Strain type roof separation layer sensor based on fiber bragg grating ) 是由 王冕 于 2021-08-10 设计创作，主要内容包括：本发明公开了一种基于光纤光栅的应变式顶板离层传感器,包括有防护罩,所述防护罩的基面固定连接有与其内部连通的防护管,所述防护管的外壁安装有防护管卡爪,以及顶部的端口处固定安装有密封堵头,所述防护管的内部活动穿接有第一钢丝绳和第二钢丝绳,所述第一钢丝绳滑动穿过密封堵头延伸至防护管的外部,以及位于防护管外部的一端固定连接有深部卡爪,所述第二钢丝绳滑动穿过密封堵头延伸至防护管的外部,以及位于防护管外部的一端固定连接有浅部卡爪,本发明涉及矿山技术领域。本发明,解决了以往的顶板离层指示仪是通过测量钢丝绳电阻的方式测算离层距离的问题。(The invention discloses a strain type roof separation sensor based on fiber bragg grating, which comprises a protective cover, wherein a base surface of the protective cover is fixedly connected with a protective pipe communicated with the interior of the protective cover, a protective pipe clamping jaw is arranged on the outer wall of the protective pipe, a sealing plug is fixedly arranged at the port of the top of the protective pipe, a first steel wire rope and a second steel wire rope are movably connected in the protective pipe in a penetrating mode, the first steel wire rope penetrates through the sealing plug in a sliding mode and extends to the exterior of the protective pipe, a deep clamping jaw is fixedly connected to one end, located at the exterior of the protective pipe, of the second steel wire rope penetrates through the sealing plug and extends to the exterior of the protective pipe, and a shallow clamping jaw is fixedly connected to one end, located at the exterior of the protective pipe. The invention solves the problem that the traditional roof separation indicator measures and calculates the separation distance by measuring the resistance of a steel wire rope.)

1. The utility model provides a strain gauge roof separation layer sensor based on fiber grating, including protection casing (7), its characterized in that: the protecting device is characterized in that a base surface of the protecting cover (7) is fixedly connected with a protecting pipe (6) communicated with the inside of the protecting pipe, a protecting pipe clamping jaw (8) is installed on the outer wall of the protecting pipe (6), a sealing plug (9) is fixedly installed at the port of the top of the protecting pipe, a first steel wire rope (2) and a second steel wire rope (10) are movably connected to the inside of the protecting pipe (6) in a penetrating mode, the first steel wire rope (2) penetrates through the sealing plug (9) in a sliding mode and extends to the outside of the protecting pipe (6), one end, located outside the protecting pipe (6), of the protecting pipe is fixedly connected with a deep clamping jaw (1), the second steel wire rope (10) penetrates through the sealing plug (9) in a sliding mode and extends to the outside of the protecting pipe (6), and one end, located outside the protecting pipe (6), of the shallow clamping jaw (3) is fixedly connected with a shallow clamping jaw;

the port department of protection casing (7) bottom has protective cover (8), two panel boards (9) are installed to the bottom of protective cover (8), the inside of protection casing (7) is rotated through the round pin axle and is connected with two wheels and rolls (11), one side fixed mounting that the wheel rolled (11) has extension spring (12) to and the concentric fixedly connected with screw axis (13) of opposite side, fixedly connected with water conservancy diversion piece (14) are located at the inside center of protective cover (8), the lateral wall fixed mounting that the wheel rolled (11) has cantilever beam (15), the bar groove has been seted up to the lateral wall of cantilever beam (15), and the inner wall fixed mounting in bar groove has optic fibre (16).

2. The fiber grating-based strain-type roof delamination sensor of claim 1, wherein: the end part of the tension spring (12) is fixedly connected with the inner wall of the protective cover (7).

3. The fiber grating-based strain-type roof delamination sensor of claim 1, wherein: the first steel wire rope (2) and the second steel wire rope (10) vertically slide to penetrate through the diversion block (14), respectively slide out of two sides of the diversion block (14), and are respectively and fixedly wound on the outer walls of the two wheel rollers (11).

4. The fiber grating-based strain-type roof delamination sensor of claim 1, wherein: an instrument pull rope is arranged between the wheel roller (11) and the instrument panel (9) to drive the instrument pointer to rotate.

5. The fiber grating-based strain-type roof delamination sensor of claim 1, wherein: one end of the cantilever beam (15) is lapped on the outer wall of the spiral shaft (13).

Technical Field

The invention relates to the technical field of mines, in particular to a strain type roof separation sensor based on fiber bragg gratings.

Background

The roof separation indicator (hereinafter referred to as "separation indicator") in the past measures and calculates the separation distance by measuring the resistance of a steel wire rope, because the interior of a coal mine has strict explosion-proof requirements, the battery and the digital display part of the separation indicator need to additionally carry out explosion-proof consideration, an explosion-proof shell is added, and because of power signal transmission, the transmission loss among various signals is large, meanwhile, a wireless transmission module needs to transmit the collected data, special data collection equipment is used for collecting the data, the equipment type is increased, the steps are complicated during use, the equipment is heavy and the cost is high.

Disclosure of Invention

The invention aims to solve the problem that the conventional roof separation indicator measures and calculates the separation distance by measuring the resistance of a steel wire rope, and provides a strain type roof separation sensor based on fiber bragg gratings.

In order to achieve the purpose, the invention adopts the following technical scheme: a strain type roof separation sensor based on fiber bragg gratings comprises a protective cover, wherein a base surface of the protective cover is fixedly connected with a protective pipe communicated with the interior of the protective pipe, a protective pipe clamping jaw is installed on the outer wall of the protective pipe, a sealing plug is fixedly installed at the port of the top of the protective pipe, a first steel wire rope and a second steel wire rope are movably connected in the protective pipe in a penetrating mode, the first steel wire rope penetrates through the sealing plug in a sliding mode and extends to the exterior of the protective pipe, a deep clamping jaw is fixedly connected to one end, located on the exterior of the protective pipe, of the second steel wire rope penetrates through the sealing plug and extends to the exterior of the protective pipe, and a shallow clamping jaw is fixedly connected to one end, located on the exterior of the protective pipe;

the port department of protection casing bottom has the protective cover, two panel boards are installed to the bottom of protective cover, the inside of protection casing is rotated through the round pin axle and is connected with two wheels and rolls, one side fixed mounting that the wheel was rolled has the extension spring to and the concentric fixedly connected with screw axis of opposite side, the inside center department fixedly connected with water conservancy diversion piece of protective cover, the lateral wall fixed mounting that the wheel was rolled has the cantilever beam, the bar groove has been seted up to the lateral wall of cantilever beam, and the inner wall fixed mounting in bar groove has optic fibre.

Preferably, the end part of the tension spring is fixedly connected with the inner wall of the protective cover.

Preferably, the first steel wire rope and the second steel wire rope vertically slide through the diversion block, respectively slide out of two sides of the diversion block, and respectively and fixedly wind on outer walls of the two wheel rollers.

Preferably, a meter pull rope is arranged between the wheel roller and the instrument panel so as to drive the meter pointer to rotate.

Preferably, one end of the cantilever beam is lapped on the outer wall of the spiral shaft.

Compared with the prior art, the invention has the following beneficial effects: the motion of roof stratum can make the deep card grab and take place the displacement, and the first steel cable of fixing on the deep card grab can make gyro wheel and screw axis rotatory, and the cantilever beam produces deformation under the effect of screw axis, and the optic fibre of fixing on the cantilever beam can be crooked along with the deformation of cantilever beam, and the demodulation instrument calculates the optic fibre wavelength change thereupon, and then calculates the absciss layer data, simultaneously, makes the instrument pointer rotatory through the effect of instrument stay cord simultaneously, indicates out the absciss layer data. When the rock stratum moves in the opposite direction, the roller and the screw shaft rotate in the opposite direction under the action of the tension spring, and the separation data is measured in the same way; meanwhile, the invention also considers that the demodulation instrument detects the separation layer data and can read the data by naked eyes.

Drawings

The invention is described in further detail below with reference to the following figures and detailed description:

FIG. 1 is a schematic overall structure of the present invention;

FIG. 2 is a schematic structural view of a portion of the present invention;

FIG. 3 is a schematic structural view of a portion of the present invention;

fig. 4 is a schematic structural diagram of the cantilever beam of the present invention.

In the figure: 1. a deep jaw; 2. a first wire rope; 3. shallow jaw; 4. sealing the plug; 5. a protective tube jaw; 6. a protective tube; 7. a protective cover; 8. a protective cover; 9. an instrument panel; 10. a second wire rope; 11. rolling the wheel; 12. a tension spring; 13. a screw shaft; 14. a flow guide block; 15. a cantilever beam; 16. an optical fiber.

Detailed Description

The following description of the embodiments of the present invention is provided for illustrative purposes, and other advantages and effects of the present invention will become apparent to those skilled in the art from the present disclosure.

Please refer to fig. 1 to 4. It should be understood that the structures, ratios, sizes, and the like shown in the drawings and described in the specification are only used for matching with the disclosure of the specification, so as to be understood and read by those skilled in the art, and are not used to limit the conditions under which the present invention can be implemented, so that the present invention has no technical significance, and any structural modification, ratio relationship change, or size adjustment should still fall within the scope of the present invention without affecting the efficacy and the achievable purpose of the present invention. In addition, the terms "upper", "lower", "left", "right", "middle" and "one" used in the present specification are for clarity of description, and are not intended to limit the scope of the present invention, and the relative relationship between the terms and the terms is not to be construed as a scope of the present invention.

The invention provides a technical scheme that: a strain type roof separation sensor based on fiber bragg gratings comprises a protective cover 7, wherein a base surface of the protective cover 7 is fixedly connected with a protective pipe 6 communicated with the interior of the protective pipe, a protective pipe clamping jaw 8 is installed on the outer wall of the protective pipe 6, a sealing plug 9 is fixedly installed at the port of the top of the protective pipe 6, a first steel wire rope 2 and a second steel wire rope 10 are movably connected to the interior of the protective pipe 6 in a penetrating mode, the first steel wire rope 2 slides through the sealing plug 9 and extends to the exterior of the protective pipe 6, one end, located on the exterior of the protective pipe 6, of the deep clamping jaw 1 is fixedly connected with the second steel wire rope 10, the second steel wire rope slides through the sealing plug 9 and extends to the exterior of the protective pipe 6, and one end, located on the exterior of the protective pipe 6, of the shallow clamping jaw 3 is fixedly connected with the first end;

the port department of protection casing 7 bottom has the protective cover 8, two panel boards 9 are installed to the bottom of protective cover 8, the inside of protection casing 7 is connected with two wheels through the round pin axle rotation and rolls 11, one side fixed mounting that the wheel rolled 11 has extension spring 12 to and the concentric fixedly connected with screw axis 13 of opposite side, fixedly connected with water conservancy diversion piece 14 is located at the inside center of protective cover 8, the wheel rolls 11 lateral wall fixed mounting has cantilever beam 15, the bar groove has been seted up to cantilever beam 15's lateral wall, and the inner wall fixed mounting in bar groove has optic fibre 16.

The end part of the tension spring 12 is fixedly connected with the inner wall of the protective cover 7.

The first steel wire rope 2 and the second steel wire rope 10 vertically slide through the diversion block 14, respectively slide out of two sides of the diversion block 14, and respectively and fixedly wind on outer walls of the two wheel rollers 11.

And an instrument pull rope is arranged between the wheel roller 11 and the instrument panel 9 so as to drive the instrument pointer to rotate.

One end of the cantilever beam 15 is lapped on the outer wall of the spiral shaft 13

During the use, the motion of roof stratum can make deep card grab 1 take place the displacement, fix first steel cable 2 on deep card grab 1 and can make gyro wheel 11 and screw axis 13 rotatory, cantilever beam 12 produces deformation under the effect of screw axis 13, the optic fibre 16 of fixing on cantilever beam 12 can be crooked along with the deformation of cantilever beam 12, demodulation instrument calculates the optic fibre wavelength change thereupon, and then calculates the absciss layer data, simultaneously, the effect through the instrument stay cord makes the instrument pointer rotatory simultaneously, indicates out absciss layer data. When the rock stratum moves in the reverse direction, the roller 11 and the screw shaft 13 rotate in the reverse direction under the action of the tension spring 12, and the separation data is measured in the same way; meanwhile, the invention also considers that the demodulation instrument detects the separation layer data and can read the data by naked eyes.

The foregoing embodiments are merely illustrative of the principles and utilities of the present invention and are not intended to limit the invention. Any person skilled in the art can modify or change the above-mentioned embodiments without departing from the spirit and scope of the present invention. Accordingly, it is intended that all equivalent modifications or changes which can be made by those skilled in the art without departing from the spirit and technical spirit of the present invention be covered by the claims of the present invention.