CN102183220A - Sensor and method for testing revolution angle of blocks - Google Patents
Sensor and method for testing revolution angle of blocks Download PDFInfo
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- CN102183220A CN102183220A CN 201110047058 CN201110047058A CN102183220A CN 102183220 A CN102183220 A CN 102183220A CN 201110047058 CN201110047058 CN 201110047058 CN 201110047058 A CN201110047058 A CN 201110047058A CN 102183220 A CN102183220 A CN 102183220A
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Abstract
The invention discloses a sensor for testing a revolution angle of blocks, comprising a hinge device, an elasticity device and a fiber grating, wherein the hinge device can freely rotate around a shaft, two ends of the elasticity device are respectively fixed onto two hinges of the hinge device, and the fiber grating is pasted to a surface of a rubber band. The invention also discloses a method for measuring the revolution angle of blocks. By measuring the revolution angle of blocks with the fiber grating, the invention proposes a method and technology for testing a revolution angle of blocks with the fiber grating, further forms a sensor structure based thereon, and provides more basis for on-site practice of coal mine exploitation.
Description
Technical field
The present invention relates to the colliery technical field, especially a kind of sillar angle of revolution testing sensor and method.
Background technology
In the coal mining activity, underlying seam exploitation back is because the bottom is unsettled, will cause superincumbent stratum disrumpent feelings, collapsing falls.But because the intensity of rock is bigger, broken sillar will form certain structure owing to mutual revolution when falling collapsing, and makes it no longer collapse.The professor of China Mining University, academician of the Chinese Academy of Sciences Qian Minggao have proposed " masonry beam " theory, be disrumpent feelings sillar owing to push the formation horizontal force mutually, thereby between sillar, produce friction force, formed the equilibrium relation of crannied body beam, this structure is referred to as " masonry beam ", its structure as shown in Figure 1, wherein α is the sillar angle of revolution.
Theory is tested by analog simulation and field practice proves " masonry beam ", particularly can observe the existence of masonry beam intuitively by the analog simulation experiment.But from " masonry beam " theoretical decades that propose so far, the angle of revolution between the sillar is never tested, and people are definite by observing intuitively.But like simulated experiment or scene, the angle of revolution can't draw in the time of can't be observed for cubic phase.Can't draw go back to the angle and just can't obtain the rock beam structure, also just can not judge the stable relation of rock stratum.Thereby make people only rest on " guess " state to the formation of rock beam structure.
Fiber grating has been the emerging in the world passive sensitive element of reflection filter a kind of extensive application prospect, function admirable since the nineties in 20th century, responds to extraneous small strain by moving of Bragg optical grating reflection wavelength and changes and realize the structure on-line measurement.Its ultimate principle is: when the light wave in the optical fiber passes through grating, the light that satisfies the grating wavelength condition is reflected and returns to form to be reflected light, remaining light becomes transmitted light, the variation of extraneous parameter will cause the drift of reflected light wavelength, and by can obtain the variable quantity of extraneous parameter to the detection of wavelength shift.Temperature and strain are the extraneous parameters that can directly change reflection wavelength.Optical fiber grating structure as shown in Figure 2, Λ is the grating cycle; Energy distribution figure when Fig. 3 passes through grating for light, wherein 3-1 is an incident light spectrum, and 3-2 is a reflectance spectrum, and 3-3 is transmission (conduction) spectrum, and horizontal ordinate is represented wavelength, ordinate is represented energy, λ
bBe catoptrical centre wavelength.
Fiber grating has high measuring accuracy, and be not subjected to external interference such as electromagnetic radiation, also have multiple advantages such as the laying of being easy to, quasi-distributed measurement in addition, Given this, this technology has in a plurality of fields such as Aero-Space, compound substance, concrete structure engineering, power engineering and medical science and is used widely.
Summary of the invention
Technical matters to be solved by this invention is to provide a kind of sillar angle of revolution testing sensor based on theory of the fiber optical at the deficiencies in the prior art, and a kind of method of using the angle of revolution between the sensor test sillar of the present invention is provided.
The present invention adopts following technical scheme:
A kind of sillar angle of revolution testing sensor, comprise hinge apparatus, elastic device, fiber grating: hinge apparatus can rotate freely around axle, the two ends of described elastic device are separately fixed on two pages of Hinge, described fiber grating sticks on the surface of described bungee.
Described sillar angle of revolution testing sensor, described elastic device is a bungee.
A kind of method of measuring the angle of revolution between the sillar, described sillar angle of revolution testing sensor is imbedded in the simulation rock stratum of analog simulation experiment, when disrumpent feelings, the revolution of superincumbent stratum is drawn in underlying seam exploitation, to cause the rotation of two hinges of described Hinge, drive the bungee of pasting on it and produce dilatation, cause the strain variation of fiber grating, by strain measurement to described fiber grating, carry out data processing again, can obtain the angle of revolution between the sillar.
By the angle of revolution between the fiber grating test sillar, the test volume method and the technology of fiber grating sillar angle of revolution proposed, form sensing arrangement based on this, for the coal mining field practice provides more foundations.
Description of drawings
Fig. 1 is a masonry girder construction synoptic diagram;
Fig. 2 optical fiber grating structure synoptic diagram;
Energy distribution figure when Fig. 3 passes through grating for light;
Fig. 4 sensor construction synoptic diagram of the present invention
Fig. 5 is the partial enlarged drawing of Fig. 4;
Fig. 6 test process circuit theory of the present invention synoptic diagram.
Embodiment
Below in conjunction with specific embodiment, the present invention is described in detail.
1, sensor construction
Sensor construction of the present invention such as Fig. 4, shown in Figure 5 comprise hinge apparatus 10, elastic device (present embodiment adopts bungee 20, also can adopt other elastomeric elements, for example spring etc.), fiber grating 30.Hinge apparatus 10 can rotate freely around axle, the two ends of described bungee 20 is separately fixed on two pages of Hinge 10, makes bungee 20 keep certain stretching degree of freedom in the time of fixedly, described fiber grating 30 is sticked on the surface of bungee.
3, working sensor principle
Sensor of the present invention is imbedded in the simulation rock stratum of analog simulation experiment, when disrumpent feelings, the revolution of superincumbent stratum is drawn in underlying seam exploitation, will cause the rotation of two hinges of described Hinge, drive the bungee of pasting on it 20 and produce dilatation, cause the strain variation of fiber grating 30, by the strain measurement to fiber grating, the data processing of being correlated with again can obtain the angle of revolution α between the sillar.
4, test process
As shown in Figure 6, fiber grating 30 is connected with (FBG) demodulator 40 by outside lead, and (FBG) demodulator 40 links to each other with external computing machine 42 by network connectivity 41.(FBG) demodulator 40 sends light signal, to fiber grating 30, the light that satisfies conditioned reflex is reflected, reflected light returns (FBG) demodulator 40, generate electric signal, data acquisition 22 living digital signals 32 through opto-electronic conversion 21, digital signal 32 through wavelength calculate 23, data analysis 24, can obtain the change information of reflection wavelength by this process, ask the variation that can obtain the angle of revolution by data processing again.
Should be understood that, for those of ordinary skills, can be improved according to the above description or conversion, and all these improvement and conversion all should belong to the protection domain of claims of the present invention.
Claims (3)
1. a sillar angle of revolution testing sensor is characterized in that, comprises hinge apparatus, elastic device, fiber grating; Hinge apparatus can rotate freely around axle, the two ends of described elastic device is separately fixed on two pages of Hinge, and described fiber grating sticks on the surface of described bungee.
2. sillar according to claim 1 angle of revolution testing sensor is characterized in that described elastic device is a bungee.
3. method of measuring the angle of revolution between the sillar, it is characterized in that, adopt claim 1 or 2 described sensors to measure, described sillar angle of revolution testing sensor is imbedded in the simulation rock stratum of analog simulation experiment, when disrumpent feelings, the revolution of superincumbent stratum is drawn in underlying seam exploitation, to cause the rotation of two hinges of described Hinge, drive the bungee of pasting on it and produce dilatation, cause the strain variation of fiber grating, by strain measurement to described fiber grating, carry out data processing again, can obtain the angle of revolution between the sillar.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN 201110047058 CN102183220A (en) | 2011-02-28 | 2011-02-28 | Sensor and method for testing revolution angle of blocks |
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| CN 201110047058 CN102183220A (en) | 2011-02-28 | 2011-02-28 | Sensor and method for testing revolution angle of blocks |
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| CN102183220A true CN102183220A (en) | 2011-09-14 |
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| CN 201110047058 Pending CN102183220A (en) | 2011-02-28 | 2011-02-28 | Sensor and method for testing revolution angle of blocks |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103256894A (en) * | 2013-03-19 | 2013-08-21 | 西安科技大学 | Fiber grating two-dimensional displacement monitor and method to monitor displacement |
| CN111208009A (en) * | 2020-01-15 | 2020-05-29 | 太原理工大学 | Method for testing stress distribution form of contact surface of key block of masonry beam |
| CN115615395A (en) * | 2022-11-18 | 2023-01-17 | 山东科技大学 | Fiber grating goaf overlying strata inclinometer and measurement method thereof |
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| CN2257262Y (en) * | 1996-03-01 | 1997-07-02 | 梁爱枝 | Anti-hijacking theft-proof alarm device for car |
| JP2005172536A (en) * | 2003-12-10 | 2005-06-30 | Taisei Kiso Sekkei Kk | Knuckle measuring device |
| CN101701800A (en) * | 2009-11-25 | 2010-05-05 | 山东省科学院激光研究所 | Optical fiber gradient measuring sensor and tailing storeroom optical fiber gradient measuring system |
| CN202066498U (en) * | 2011-02-28 | 2011-12-07 | 河南理工大学 | Rock mass rotation angle testing sensor |
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2011
- 2011-02-28 CN CN 201110047058 patent/CN102183220A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN2257262Y (en) * | 1996-03-01 | 1997-07-02 | 梁爱枝 | Anti-hijacking theft-proof alarm device for car |
| JP2005172536A (en) * | 2003-12-10 | 2005-06-30 | Taisei Kiso Sekkei Kk | Knuckle measuring device |
| CN101701800A (en) * | 2009-11-25 | 2010-05-05 | 山东省科学院激光研究所 | Optical fiber gradient measuring sensor and tailing storeroom optical fiber gradient measuring system |
| CN202066498U (en) * | 2011-02-28 | 2011-12-07 | 河南理工大学 | Rock mass rotation angle testing sensor |
Non-Patent Citations (1)
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| 《西安科技大学学报》 20080930 柴敬 等 光纤光栅测试岩石变形的试件模拟实验研究 401-405 1-3 第28卷, 第3期 * |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103256894A (en) * | 2013-03-19 | 2013-08-21 | 西安科技大学 | Fiber grating two-dimensional displacement monitor and method to monitor displacement |
| CN103256894B (en) * | 2013-03-19 | 2016-02-03 | 西安科技大学 | A kind of method of fiber grating two-dimensional displacement monitor and displacement monitoring thereof |
| CN111208009A (en) * | 2020-01-15 | 2020-05-29 | 太原理工大学 | Method for testing stress distribution form of contact surface of key block of masonry beam |
| CN111208009B (en) * | 2020-01-15 | 2022-04-22 | 太原理工大学 | Method for testing stress distribution form of contact surface of key block of masonry beam |
| CN115615395A (en) * | 2022-11-18 | 2023-01-17 | 山东科技大学 | Fiber grating goaf overlying strata inclinometer and measurement method thereof |
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Application publication date: 20110914 |