CN214951155U - Vertical shaft cage guide deformation optical fiber real-time monitoring system - Google Patents
Vertical shaft cage guide deformation optical fiber real-time monitoring system Download PDFInfo
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- CN214951155U CN214951155U CN202121288483.1U CN202121288483U CN214951155U CN 214951155 U CN214951155 U CN 214951155U CN 202121288483 U CN202121288483 U CN 202121288483U CN 214951155 U CN214951155 U CN 214951155U
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Abstract
The utility model discloses a vertical shaft cage guide deformation optical fiber real-time monitoring system, which comprises an optical fiber grating displacement sensor, an optical fiber grating acceleration sensor, a multi-core optical cable, an optical fiber junction box, an optical fiber grating demodulator and a monitoring host; the fiber bragg grating displacement sensors are arranged between the cage guide beam and the wall of the vertical shaft, between the cage guide and the wall of the vertical shaft and at two ends of the joint of the adjacent cage guides; the fiber bragg grating acceleration sensor is arranged on the cage guide beam close to the vertical shaft wall side and the surface of the cage guide and close to the fiber bragg grating displacement sensor; the fiber bragg grating displacement sensor and the fiber bragg grating acceleration sensor are respectively connected with the multi-core optical cable and are placed in an optical cable junction box; the multi-core optical cable is connected with a fiber bragg grating demodulator of the ground monitoring room, light wave signals are demodulated into digital signals through the fiber bragg grating demodulator, and the digital signals are transmitted to the monitoring host to construct a set of sensing monitoring network.
Description
Technical Field
The utility model relates to a colliery vertical shaft cage guide warp real-time monitoring system specifically is a colliery vertical shaft cage guide warp optic fibre real-time monitoring system based on fiber grating displacement sensor and fiber grating acceleration sensor.
Background
The vertical shaft lifting system is used as a junction for connecting an underground production working face and the ground, and plays an important role in lifting coal and gangue, lowering materials, lifting personnel and equipment. The cage in the mine shaft has high use frequency and high operation strength, so that a cage guide beam and a cage guide which are connected with the cage are easy to deform, and the normal operation and the mine safety production of the cage are influenced.
The related cage guide deformation monitoring method mainly comprises a geometric distance measurement method and a professional instrument method. The geometric distance measurement method is used for judging the deformation degree of the cage guide by manually measuring the distance between the cage guide and the steel wire rope and the included angle between the diagonal direction and the front direction of the cage guide to be measured. The method has the problems of low monitoring precision and high labor cost. The professional instrument method is to adopt a section measuring instrument to continuously monitor the spacing between the cage guides to realize the overall section monitoring of the cage guides, but the instrument adopts an inductive sensor as a distance measuring tool, is easy to be interfered by electromagnetic radiation and temperature under the condition of a shaft environment, and has large error of test data.
SUMMERY OF THE UTILITY MODEL
To the problem that above-mentioned prior art exists, the utility model provides a vertical shaft cage guide warp optic fibre real-time monitoring system through the real-time supervision to parameters such as displacement, acceleration of cage guide and cage guide roof beam, realizes that cage guide steady state judges, and the staff of being convenient for in time takes corresponding measure, avoids colliery incident and casualties, reduces loss of property.
The utility model adopts the technical proposal that: a vertical shaft cage guide deformation optical fiber real-time monitoring system is characterized by comprising an optical fiber grating displacement sensor, an optical fiber grating acceleration sensor, a multi-core optical cable, an optical fiber junction box, an optical fiber grating demodulator and a monitoring host; the fiber bragg grating displacement sensors are arranged between the cage guide beam and the wall of the vertical shaft, between the cage guide and the wall of the vertical shaft and at the joints between the cage guide and the cage guide; the fiber bragg grating acceleration sensor is arranged on the cage guide beam close to the vertical shaft wall side and the surface of the cage guide and close to the fiber bragg grating displacement sensor; the fiber bragg grating displacement sensor and the fiber bragg grating acceleration sensor are respectively connected with the multi-core optical cable and are placed in an optical cable junction box; the multi-core optical cable is connected with a fiber bragg grating demodulator of the ground monitoring room, light wave signals are demodulated into digital signals through the fiber bragg grating demodulator, and the digital signals are transmitted to the monitoring host to construct a set of sensing monitoring network.
When the fiber grating displacement sensor is connected with the cage guide beam, the fiber grating displacement sensor is respectively positioned at the central positions of the length and the height of the cage guide beam in the horizontal direction and the vertical direction, and the fiber grating acceleration sensor is arranged at the central position of the upper surface or the lower surface of the cage guide beam.
When the fiber grating displacement sensor is connected with the cage guide, the fiber grating displacement sensor is positioned at the center of the length of the cage guide between the adjacent cage guide beams in the vertical direction, and the fiber grating acceleration sensor is arranged close to the fiber grating displacement sensor.
When the fiber bragg grating displacement sensor is arranged at the joint of the cage guide, two ends of the displacement sensor in the vertical direction are respectively fixed on the outer surfaces of the adjacent upper and lower cage guides, and the convergence value of the cage guide joint is monitored.
The fiber grating displacement sensor and the fiber grating acceleration sensor are both embedded with a fiber grating temperature sensor, so that the temperature compensation of the fiber grating sensor is realized, and the influence of the temperature change in the shaft on the monitoring data is eliminated.
The monitoring host comprises a real-time data acquisition module, a data analysis module and a safety early warning module of cage guide displacement and vibration parameters, and the real-time data acquisition module and the safety early warning module are respectively connected with the data analysis module.
The distance between the fiber bragg grating displacement sensor connected with the cage guide and the position, closest to the joint of the cage guide, is 0.5-3 cm.
The distance between the closest fiber grating acceleration sensor and the closest fiber grating displacement sensor is 1-2 cm.
And the contact points of the fiber bragg grating displacement sensor and the fiber bragg grating acceleration sensor with the cage guide and the cage guide beam are fixed by welding or epoxy resin pasting.
The fiber grating displacement sensor, the fiber grating acceleration sensor and a well wall contact point are fixed in a welding or epoxy resin pasting mode.
And the fiber bragg grating displacement sensor and the fiber bragg grating acceleration sensor are welded with each optical fiber in the multi-core optical cable.
Compared with the prior art, the utility model discloses a fiber grating displacement sensor and fiber grating acceleration sensor, realize the cage guide bending, eccentric and the vibrations condition real-time supervision, data analysis and safety precaution for monitoring system provide mass data, it is high to have monitoring precision, the interference killing feature is strong, advantages such as system coupling nature is good, it is high to have compensatied the human cost who exists in the monitoring of shaft cage guide, automatic real-time supervision is not enough scheduling problem, in time master the deformation state of cage guide, for accurately getting rid of the potential safety hazard in the cage operation process, ensure personnel's safety, guarantee mine safety production provides effectual data support.
Drawings
FIG. 1 is a schematic vertical sectional view of a vertical shaft;
FIG. 2 is an enlarged view of a portion of FIG. 1;
FIG. 3 is a schematic cross-sectional view of a fiber grating displacement sensor and a fiber grating acceleration sensor connected to a cage guide beam;
FIG. 4 is a schematic cross-sectional view of a fiber grating displacement sensor and a fiber grating acceleration sensor connected to a cage guide;
in the figure: 1. the system comprises a fiber bragg grating displacement sensor 2, a fiber bragg grating acceleration sensor 3, a multi-core optical cable 4, a fiber optic junction box 5, a fiber bragg grating demodulator 6, a monitoring host 7, a cage guide beam 8, a cage guide 9, a seam 10, a vertical shaft wall 11 and a cage.
Detailed Description
The present invention will be further described with reference to the following examples.
Example 1
By the monitoring system, deformation of the vertical well pipeline is monitored and early warned.
As shown in fig. 1 and 2, the shaft guide 8 is a cuboid structure, the periphery of the shaft guide is fixed with a shaft wall 10 of a vertical shaft through a shaft guide beam, and the vertical shaft guide deformation optical fiber real-time monitoring system comprises an optical fiber grating displacement sensor 1, an optical fiber grating acceleration sensor 2, a multi-core optical cable 3, an optical fiber junction box 4, an optical fiber grating demodulator 5 and a monitoring host 6.
Step one, laying a vertical well tank deformation optical fiber real-time monitoring system:
1) installing the fiber bragg grating displacement sensor 1 between a cage guide beam 7 and a vertical shaft wall 10, between a cage guide 8 and the vertical shaft wall, and at the joint 9 of the upper and lower adjacent cage guides of the cage guide 8 by adopting a welding or epoxy resin pasting mode; the fiber grating acceleration sensor 2 is arranged on the surfaces of a cage guide beam 7 and a cage guide 8 close to the side of the vertical shaft wall in a welding or epoxy resin pasting mode and is adjacent to the fiber grating displacement sensor 1.
As shown in fig. 1-3, according to the stress characteristics of the cage guide 8, the fiber grating displacement sensor 1 is installed on the opposite surface of the cage guide beam 7 and the vertical shaft wall 10, the fiber grating displacement sensor 1 is located at the central point of the length of the cage guide beam 7 in the horizontal direction, and the fiber grating acceleration sensor 2 is installed on the top surface or the bottom surface of the cage guide beam 7 and is located at the central point of the length and the width of the cage guide beam 7 in the horizontal direction.
As shown in fig. 2 and 3, a fiber grating displacement sensor 1 is installed at the central point of the surface of a cage guide 8 between two adjacent cage guide beams 7, and a fiber grating acceleration sensor 2 is installed close to the fiber grating displacement sensor 1 at a distance of 1-2 cm. The distance between the fiber bragg grating displacement sensor 1 closest to the joint 9 of the cage guide 8 and the joint 9 is 0.5-3 cm.
As shown in fig. 2, a fiber grating displacement sensor 1 is installed at a joint 9 of the upper cage guide and the lower cage guide, one end of the fiber grating displacement sensor 1 is fixed with the upper cage guide, and the other end is fixed with the lower cage guide for monitoring a convergence value of the cage guide.
The fiber grating temperature sensors are embedded in the fiber grating displacement sensor 1 and the fiber grating acceleration sensor 2, so that the temperature compensation of the fiber grating sensors is realized, and the influence of the temperature change in the shaft on monitoring data is eliminated.
2) And the fiber bragg grating displacement sensor 1, the fiber bragg grating acceleration sensor 2 and each optical fiber in the multi-core optical cable are welded, and an optical cable junction box 4 arranged on the monitoring section of the fiber bragg grating sensor is placed.
3) The multi-core optical cable is led to the ground and is connected with a fiber grating demodulator 5 of a ground monitoring room, and the light wave signal is demodulated into a digital signal through the fiber grating demodulator 4 and is transmitted to a monitoring host 6.
And step two, judging and identifying the deformation value of the cage guide, determining a monitoring threshold value and sending out an early warning signal.
1) Judging the deformation value of the cage guide, and determining the convergence value of the cage guide according to the displacement monitoring data of the same section of the symmetrical cage guide connected with the cage; judging the bending state of the cage guide according to the displacement values of the monitoring points along the cage guide, and determining the dislocation amount of the joint of the cage guide; judging the balance stability of the cage according to the monitoring data of acceleration sensors with the same section of symmetrical cage guides connected with the cage; and determining the vibration frequency of the cage guide through the acceleration measurement value of each monitoring point along the cage guide, and judging the safety of the cage guide. The method comprises the following specific steps:
1.1) determining staggered displacement values at the guide connection based on the guide displacement values, i.e.
ΔL1＝L1-L2
Wherein L is1、L2The displacement measured by the upper fiber bragg grating displacement sensor and the lower fiber bragg grating displacement sensor at the same cage guide connecting position respectively.
1.2) convergence value of the same section of the symmetrical cage guide, i.e.
ΔL2＝L(left and right)+L3-L4
Wherein L is(left and right)The horizontal distance between the left cage guide and the right cage guide; l is3、L4The displacement measured by the fiber bragg grating displacement sensor of the left and right corresponding cage guide respectively.
1.3) determining the vibration frequency of the cage guide during the operation of the cage based on the acceleration value of the fiber bragg grating of the cage guide, namely
Wherein a is the measured vibration acceleration and d is the amplitude of the cage guide. The vibration frequency reflects the rigidity change and the structural damage of the cage guide. Stiffness versus its vibration frequency: k ═ 2 pi f)2M, wherein m is the mass of the cage guide; the larger the vibration frequency change is, the more serious the structural damage is; when its vibration frequency is equal to zero, the cage guide is damaged.
2) And determining a monitoring threshold, namely determining a displacement measurement threshold and a vibration frequency threshold according to parameters such as allowable deformation, strength and bending moment of the hollow square steel of the cage guide and a staggered displacement value of the joint of the cage guide. The change of the vibration acceleration of the cage guide collected by the fiber grating acceleration sensor 2 is used as a basic criterion for judging whether the steel of the cage guide is deformed, and the deformation of the cage guide is further determined by establishing the relation between typical faults and signal characteristics and comparing vibration data in a non-fault period.
3) When the deformation of the cage guide exceeds the monitoring threshold, the early warning system automatically sends the information of the cage guide deformation, the fault position and the like to a mine dispatching room and related responsible persons.
And storing the acquired data into a database in real time, and establishing the database in a non-failure period. Through the mass data of the database, the acquired data are contrasted and analyzed, and when abnormal data exceeding a preset alarm threshold value exist, the system sends out early warning information in time to inform personnel of overhauling, so that the deformation of the cage guide is monitored in real time, and the safety of the personnel is guaranteed.
By collecting real-time data of two groups of cages in operation, the two groups of data are reversely fitted, a data relation of the two groups of cages in operation is established, the operation states of the two groups of cages are determined, and the balance and the harmony of the two groups of cages are judged.
Claims (10)
1. A vertical shaft cage guide deformation optical fiber real-time monitoring system is characterized by comprising an optical fiber grating displacement sensor, an optical fiber grating acceleration sensor, a multi-core optical cable, an optical fiber junction box, an optical fiber grating demodulator and a monitoring host; the fiber bragg grating displacement sensors are arranged between the cage guide beam and the wall of the vertical shaft, between the cage guide and the wall of the vertical shaft and at the joints between the cage guide and the cage guide; the fiber bragg grating acceleration sensor is arranged on the cage guide beam close to the vertical shaft wall side and the surface of the cage guide and close to the fiber bragg grating displacement sensor; the fiber bragg grating displacement sensor and the fiber bragg grating acceleration sensor are respectively connected with the multi-core optical cable and are placed in an optical cable junction box; the multi-core optical cable is connected with a fiber bragg grating demodulator of the ground monitoring room, light wave signals are demodulated into digital signals through the fiber bragg grating demodulator, and the digital signals are transmitted to the monitoring host to construct a set of vertical shaft cage guide sensing monitoring network.
2. The system according to claim 1, wherein the fiber grating displacement sensor is located at the center of the length and height of the shaft guide beam in the horizontal direction and the vertical direction when connected to the shaft guide beam, and the fiber grating acceleration sensor is mounted at the center of the upper surface or the lower surface of the shaft guide beam.
3. The system according to claim 1, wherein the fiber grating displacement sensor is positioned at the center of the length of the shaft between adjacent shaft guide beams in the vertical direction when connected with the shaft guide, and the fiber grating acceleration sensor is arranged close to the fiber grating displacement sensor.
4. The system according to claim 1, wherein when the fiber bragg grating displacement sensor is mounted at a joint of the cage guide, two ends of the displacement sensor in the vertical direction are respectively fixed on the outer surfaces of the adjacent upper and lower cage guides to monitor the convergence value of the cage guide joint.
5. The system according to claim 1, wherein the fiber grating displacement sensor and the fiber grating acceleration sensor are embedded with fiber grating temperature sensors to compensate the temperature of the fiber grating sensors and eliminate the influence of the temperature change in the shaft on the monitored data.
6. The system according to claim 1, wherein the monitoring host comprises a real-time data acquisition module, a data analysis module and a safety pre-warning module for cage guide displacement and vibration parameters, and the real-time data acquisition module and the safety pre-warning module are respectively connected with the data analysis module.
7. The system for monitoring the deformation of the shaft cage guide in real time according to claim 1, wherein the distance between a fiber grating displacement sensor connected with the cage guide and the position, closest to a joint of the cage guide, is 0.5-3 cm; the distance between the closest fiber grating acceleration sensor and the closest fiber grating displacement sensor is 1-2 cm.
8. The system for monitoring the deformation of the shaft cage guide in real time according to claim 1, wherein the contact points of the fiber grating displacement sensor and the fiber grating acceleration sensor with the cage guide and the cage guide beam are fixed by welding or epoxy resin adhesion.
9. The system for monitoring the deformation of the shaft cage guide in real time according to claim 1, wherein the fiber grating displacement sensor, the fiber grating acceleration sensor and a contact point of a shaft wall are fixed in a welding or epoxy resin adhesion mode.
10. The system as claimed in claim 1, wherein the FBG displacement sensor and the FBG acceleration sensor are fused to each optical fiber of the multi-core optical cable.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202121288483.1U CN214951155U (en) | 2021-06-09 | 2021-06-09 | Vertical shaft cage guide deformation optical fiber real-time monitoring system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202121288483.1U CN214951155U (en) | 2021-06-09 | 2021-06-09 | Vertical shaft cage guide deformation optical fiber real-time monitoring system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114593686A (en) * | 2022-03-18 | 2022-06-07 | 山东科技大学 | Device and method for monitoring deformation of hoistway wall of elevator |
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2021
- 2021-06-09 CN CN202121288483.1U patent/CN214951155U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114593686A (en) * | 2022-03-18 | 2022-06-07 | 山东科技大学 | Device and method for monitoring deformation of hoistway wall of elevator |
| CN114593686B (en) * | 2022-03-18 | 2023-07-28 | 山东科技大学 | Device and method for monitoring deformation of shaft wall of elevator |
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