CN105403236A - Optical fiber sensing device and method of mechanical state of coal cutter - Google Patents
Optical fiber sensing device and method of mechanical state of coal cutter Download PDFInfo
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- CN105403236A CN105403236A CN201510796179.0A CN201510796179A CN105403236A CN 105403236 A CN105403236 A CN 105403236A CN 201510796179 A CN201510796179 A CN 201510796179A CN 105403236 A CN105403236 A CN 105403236A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
- G01D5/00—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable
- G01D5/26—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable characterised by optical transfer means, i.e. using infrared, visible, or ultraviolet light
- G01D5/32—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable characterised by optical transfer means, i.e. using infrared, visible, or ultraviolet light with attenuation or whole or partial obturation of beams of light
- G01D5/34—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable characterised by optical transfer means, i.e. using infrared, visible, or ultraviolet light with attenuation or whole or partial obturation of beams of light the beams of light being detected by photocells
- G01D5/353—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable characterised by optical transfer means, i.e. using infrared, visible, or ultraviolet light with attenuation or whole or partial obturation of beams of light the beams of light being detected by photocells influencing the transmission properties of an optical fibre
- G01D5/35338—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable characterised by optical transfer means, i.e. using infrared, visible, or ultraviolet light with attenuation or whole or partial obturation of beams of light the beams of light being detected by photocells influencing the transmission properties of an optical fibre using other arrangements than interferometer arrangements
- G01D5/35354—Sensor working in reflection
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
- G01D5/00—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable
- G01D5/26—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable characterised by optical transfer means, i.e. using infrared, visible, or ultraviolet light
- G01D5/32—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable characterised by optical transfer means, i.e. using infrared, visible, or ultraviolet light with attenuation or whole or partial obturation of beams of light
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
- G01D5/00—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable
- G01D5/26—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable characterised by optical transfer means, i.e. using infrared, visible, or ultraviolet light
- G01D5/32—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable characterised by optical transfer means, i.e. using infrared, visible, or ultraviolet light with attenuation or whole or partial obturation of beams of light
- G01D5/34—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable characterised by optical transfer means, i.e. using infrared, visible, or ultraviolet light with attenuation or whole or partial obturation of beams of light the beams of light being detected by photocells
- G01D5/36—Forming the light into pulses
- G01D5/38—Forming the light into pulses by diffraction gratings
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Abstract
The invention discloses an optical fiber sensing device of a mechanical state of a coal cutter. The optical fiber sensing device includes a broadband light source (1), a 2*1 optical fiber coupler (2), an optical fiber grating demodulation module (3), a 1*4 optical switch (4), an optical fiber coupler cluster, a collimating lens cluster, a magnetic proximity switch, a trigger signal conditioning module (18), an industrial control computer (19), a roller (21), an optical fiber grating sensor (22), a permanent magnet (23) and a collimating lens (24) of the optical fiber grating sensor. Meanwhile the invention also discloses a sensing method performed by the device. According to the invention, a ''point-to-line'' signal transmission channel of the optical fiber grating sensor on roller of the coal cutter is constructed. The difficulty of the wireless transmission of sensing signals is solved. Transmission capacity limitation of the sensing signal data is reduced. The synchronous monitoring of multipoint and multi-parameter of the mechanical state of the roller of the coal cutter is realized. The optical fiber sensing device and the method of the mechanical state of the coal cutter have the advantages of large measurement range, high resolution, fast response speed, strong anti-interference capability and anti-explosion.
Description
Technical field
The present invention relates to a kind of coalcutter machinery monitoring device and monitoring method, specifically a kind of coalcutter machine performance fibre-optical sensing device and method, belong to fully-mechanized mining equipment health status monitoring technical field.
Background technology
Coal is the major consumers energy and the raw material of China, China is coal production maximum in the world at present and country of consumption, in view of the Energy Situation of China's " rich coal, oil-poor, weak breath ", within the period quite grown future, the main body energy position of coal can not change, coal industry can sane development and Chinese energy safety and sustainable economic development closely bound up.
Coalcutter is important colliery big scale production equipment, it is the important sign of coal production digitizing, robotization and mechanization, can coalcutter normally run the safety in production being directly connected to colliery, due to the working environment very severe of coalcutter, easily be subject to the impact of the complicated factors such as dust, texture of coal seam, high temperature and humidity, therefore, need to carry out real-time accurate measurements to the health status of coalcutter.
The cylinder of coalcutter bears the task of coal cutting and coal breakage, be embodied in: when cylinder is with certain rotational speed, when coalcutter runs with certain haulage speed, drum rotating also cuts rib, pick on cylinder is from coal body under cut rib, and the coal under declining is pushed in the scraper conveyor of workplace under the effect of helical blade.Due to the change of the pick quantity of the random change of coal seam Physical and mechanical properties and cut, to random variation be there is in the external applied load that coal mining machine roller is born at work, in order to ensure coalcutter safe and stable operation, therefore need the accurate measurements method seeking coal mining machine roller machine performance.
Prior art (1) is (see " Coal-rock identification method based on coal mining machine roller cut vibration characteristics ", Liu Junli etc., " coal science and technology ", 41st volume the 10th phase) be arranged on vibration transducer near roller shaft rocking arm below, accordingly the cut signal of coal mining machine roller is gathered.
Prior art (2) is (see " research and development of the intelligent coalcutter supervisory system of manless working face ", Ma Hongli etc., " coal science and technology ", the 42nd volume the 9th phase) describe a kind of mechanical state monitoring method of cylinder based on cylinder magneto (i.e. cutting motor) working current and Roller shear oil cylinder working-pressure.
Be not difficult to find from prior art (1), (2), the existing monitoring technology of coal mining machine roller machine performance mainly measures the duty of physical construction or the propulsion system be associated with cylinder, indirectly characterizes the machine performance of coal mining machine roller with this; There is the shortcomings such as the time delay of power transmission of signal or disappearance in this indirect characterizing method, can not realize the measurement accurately and reliably of coal mining machine roller machine performance.
By retrieving the documents such as disclosed technical report, scientific paper and patent of invention, do not find the direct monitoring method of coal mining machine roller machine performance, Ananlysis of main cause is as follows: the sensor 1) for monitoring can not destroy the normal operating conditions of coal mining machine roller, and coalcutter is operated in the environment of the hazardous gas enrichments such as this gas in coal mine fully-mechanized mining face, propose to be strict with to the quality of sensor, volume, mounting means and sensing type;
2) coal mining machine roller is rotary body, the sensor on cylinder and can not be wired connection between sensing signal processing module, has strict demand to the transmission mode of transducing signal;
3) machine performance of coal mining machine roller is characterized by many reference amounts such as strain and temperature, therefore only has and carries out Multipoint synchronous measurement, the machine performance of ability accurate characterization coal mining machine roller to many reference amounts such as cylinder strain and temperature.
Simultaneously, Chinese patent (publication number: CN101373558B) describes a kind of wireless optical transmission and pick-up method of high speed rotating shaft sensing data, in this patent: rotary axis module comprises the component units such as optical signal launch MCU, trigger receiver, optical signal transmitter, sensor, power supply and A/D conversion; Stuck-module comprises light signal and receives the component units such as MCU, trigger laser, optical signal receiver, power supply and communication interface; When the laser signal that the trigger laser of stuck-module sends is responded to by the trigger receiver of rotary axis module, rotary axis module is by the data cached optical signal receiver being sent to stuck-module by optical signal transmitter, complete " point-to-point " transmission of transducing signal, rotating shaft has rotated a circle once " point-to-point " Signal transmissions.
If the machine performance of prior art (3) for coal mining machine roller is monitored, the technical matters that there will be is mainly contained:
1) in prior art (3), rotary axis module belongs to active sensor, before the monitoring of coal mining machine roller machine performance, need to carry out strict Explosion-proof Design, this can cause the volume of rotary axis module and quality significantly to increase, if be arranged on coal mining machine roller, can have a negative impact to the normal operating conditions of coal mining machine roller;
2) underground coal mine fully-mechanized mining working belongs to strong electromagnetic interference environment, and in prior art (3), the optical signal launch MCU of rotary axis module and A/D converting unit are difficult to directly normally work in strong electromagnetic interference environment;
3) in prior art (3), transducing signal transmission mode between rotary axis module and stuck-module is " point-to-point " transmission, limit the transmission capacity of sensing data, the multiple spot many reference amounts Simultaneous Monitoring of coal mining machine roller can not be realized, in addition, in the responding ability of countershaft module and stuck-module and data transmission procedure, environmental stability it is also proposed high requirement;
To sum up analyze, prior art (3) cannot be combined with coalcutter technical field, and then is not suitable for the monitoring of coal mining machine roller machine performance.
Summary of the invention
For above-mentioned prior art Problems existing, the invention provides a kind of coalcutter machine performance fibre-optical sensing device and method, the Measurement accuracy to coal mining machine roller machine performance can be realized, thus ensure coalcutter safe and stable operation.
To achieve these goals, the technical solution used in the present invention is: a kind of coal mining machine roller machine performance fibre-optical sensing device, and it comprises:
Wideband light source, 2 × 1 fiber couplers, fiber grating demodulation module, 1 × 4 photoswitch, fiber coupler cluster I, fiber coupler cluster II, fiber coupler cluster III, fiber coupler cluster IV, collimation lens cluster I, collimation lens cluster II, collimation lens cluster III, collimation lens cluster IV, annular porose disc, magnetic approach switch I, magnetic approach switch II, magnetic approach switch III, magnetic approach switch IV, trigger pip conditioning module, industrial computer, roller shaft, cylinder, fiber-optic grating sensor, permanent magnet, the collimation lens of fiber-optic grating sensor,
The output tail optical fiber of described wideband light source and input tail optical fiber I welding of 2 × 1 fiber couplers, the input tail optical fiber of fiber grating demodulation module and input tail optical fiber II welding of 2 × 1 fiber couplers, the output tail optical fiber of 2 × 1 fiber couplers and the input tail optical fiber welding of 1 × 4 photoswitch;
The output tail optical fiber I of described 1 × 4 photoswitch, export tail optical fiber II, export tail optical fiber III, export tail optical fiber IV successively respectively with the input tail optical fiber welding of fiber coupler cluster I, fiber coupler cluster II, fiber coupler cluster III, fiber coupler cluster IV;
The output tail optical fiber of described fiber coupler cluster I and the tail optical fiber welding of collimation lens cluster I, the output tail optical fiber of fiber coupler cluster II and the tail optical fiber welding of collimation lens cluster II, the output tail optical fiber of fiber coupler cluster III and the tail optical fiber welding of collimation lens cluster III, the output tail optical fiber of fiber coupler cluster IV and the tail optical fiber welding of collimation lens cluster IV, collimation lens cluster I, collimation lens cluster II, collimation lens cluster III and collimation lens cluster IV are uniformly distributed along annular porose disc, magnetic approach switch I, magnetic approach switch II, magnetic approach switch III and magnetic approach switch IV all by screw fastening at annular porose disc, and be connected with trigger pip conditioning module by communication cable for mine,
Trigger pip conditioning module is connected by GPIB data line with industrial computer, and 1 × 4 photoswitch is connected by RS232 data line with industrial computer, and fiber grating demodulation module is connected by RS232 data line with industrial computer;
Wherein, cylinder is connected with roller shaft, and fiber-optic grating sensor adopts optical fiber ointment to be fixed on cylinder, and the collimation lens of fiber-optic grating sensor is embedded in cylinder, and permanent magnet is adsorbed in cylinder;
Described wideband light source is ASE wideband light source, and operating wavelength range is 1525nm to 1565nm, the output power stability≤± 0.01dB of 8 hours, degree of polarization≤0.01 of output light-wave, the spectral flatness≤0.5dB of output light-wave, Output optical power >=20mW;
The coupling ratio of 2 × 1 described fiber couplers is 50:50, and input tail optical fiber I, input tail optical fiber II and output tail optical fiber all adopt single-mode fiber SMF-28;
The input power range of described fiber grating demodulation module is-70dBm to-30dBm, and wavelength coverage is 1525nm to 1565nm, and wavelength resolution is 1pm, wavelength accuracy is ± 40pm, power resolution is 0.1dBm, has RS232 communication interface, and input tail optical fiber adopts single-mode fiber SMF-28;
The wavelength coverage of 1 × 4 described photoswitch is 1260nm to 1650nm, adjacent optical channel switching time≤1ms, insertion loss≤0.5dBm, there is RS232 communication interface, input tail optical fiber, output tail optical fiber I, output tail optical fiber II, output tail optical fiber III and output tail optical fiber IV all employing single-mode fiber SMF-28.
1 × 4 fiber coupler that described fiber coupler cluster I is 25:25:25:25 by five coupling ratios is formed, the input tail optical fiber of 1 × 4 fiber coupler I is as the input tail optical fiber of fiber coupler cluster I, four of 1 × 4 fiber coupler I export tail optical fibers respectively with 1 × 4 fiber coupler II, 1 × 4 fiber coupler III, the input tail optical fiber welding of 1 × 4 fiber coupler IV and 1 × 4 fiber coupler V, 1 × 4 fiber coupler II, 1 × 4 fiber coupler III, the output tail optical fiber of 1 × 4 fiber coupler IV and 1 × 4 fiber coupler V is as the output tail optical fiber of fiber coupler cluster I, the output tail optical fiber number of fiber coupler cluster I is 16, fiber coupler cluster II, fiber coupler cluster III and fiber coupler cluster IV all adopt the constructive method of fiber coupler cluster I, input tail optical fiber and the output tail optical fiber of fiber coupler cluster I, fiber coupler cluster II, fiber coupler cluster III and fiber coupler cluster IV all adopt single-mode fiber SMF-28.
Described collimation lens cluster I is made up of 16 collimation lenses, the range of each collimation lens is 0.38 to 0.49, clear aperature >=the 3.6mm of each collimation lens, beam divergence angle is 0.2 ° to 0.3 °, insertion loss < 0.05dB, the anti-reflection film scope of collimation lens is 1050nm to 1620nm; Collimation lens cluster II, collimation lens cluster III and collimation lens cluster IV all adopt the constructive method of collimation lens cluster I; The tail optical fiber of collimation lens cluster I, collimation lens cluster II, collimation lens cluster III and collimation lens cluster IV all adopts single-mode fiber SMF-28; Collimation lens cluster I, collimation lens cluster II, collimation lens cluster III and collimation lens cluster IV are distributed in same circular trace.
Described annular porose disc passes through casting, and the mounting hole of reserved collimation lens cluster I, collimation lens cluster II, collimation lens cluster III and collimation lens cluster IV, annular porose disc has identical cross sectional dimensions with cylinder, the xsect center of circle of annular porose disc is coaxial with the xsect center of circle of cylinder, the xsect of the annular xsect of porose disc and cylinder is parallel to each other, annular porose disc is directly welded on the rocking arm of coalcutter, with the roller shaft of coalcutter without annexation.
Described magnetic approach switch I, magnetic approach switch II, magnetic approach switch III and magnetic approach switch IV adopt dry-reed approach switch, and select essential safety type, and output state is open type, serviceable life >=1,000,000 times;
The trigger pip of described trigger pip conditioning module Real-time Collection magnetic approach switch I, magnetic approach switch II, magnetic approach switch III and magnetic approach switch IV, trigger pip is amplified and filtering process, and convert the digital signal that industrial computer can identify to, trigger pip conditioning module has GPIB communication interface, to single channel trigger pip response time≤2.5ms.
Described fiber-optic grating sensor is measured the temperature of cylinder and strain simultaneously, with the machine performance of Real-Time Monitoring cylinder, the operating wavelength range of fiber-optic grating sensor is 1525nm to 1565nm, optical grating reflection rate >=90%, wherein, temperature measurement range is-40 DEG C to 120 DEG C, and temperature resolution is 0.1 DEG C, strain measurement scope is ± 1500 μ ε, and strain resolution is 0.5 μ ε.
Described permanent magnet adopts square ferrite permanent-magnet iron, is of a size of 100mm × 60mm × 15mm.
The collimation lens of fiber-optic grating sensor has identical performance index with the collimation lens of collimation lens cluster I, and the initial position of the collimation lens of fiber-optic grating sensor is aimed at the initial position of some collimation lenses of collimation lens cluster I, collimation lens cluster II, collimation lens cluster III and collimation lens cluster IV.
The present invention also comprises a kind of coal mining machine roller optical fiber sensing method, comprise coal mining machine roller 21 turn clockwise machine performance monitoring and coal mining machine roller 21 be rotated counterclockwise machine performance observation process: process:
1) if coal mining machine roller is along turning clockwise, and the initial position of permanent magnet is between magnetic approach switch II and magnetic approach switch III, then after coal mining machine roller starts rotation, first permanent magnet enters the induction zone of magnetic approach switch III, the trigger pip of magnetic approach switch III transfers to industrial computer through trigger pip conditioning module, in conjunction with the drum rotating directional information being stored in industrial computer, industrial computer to 1 × 4 photoswitch pipage control instruction, for the input tail optical fiber of opening 1 × 4 photoswitch and the optical channel exported between tail optical fiber I;
First the output light-wave of wideband light source enters 1 × 4 photoswitch through 2 × 1 fiber couplers, then fiber coupler cluster I is entered by the output tail optical fiber I of 1 × 4 photoswitch, then enter collimation lens cluster I by the output tail optical fiber of fiber coupler cluster I, finally by collimation lens cluster I output beam array;
Certain a branch of light wave of beam array enters fiber-optic grating sensor from the collimation lens of fiber-optic grating sensor, this bundle input light wave is reflected by fiber grating in fiber-optic grating sensor, carry cylinder machine performance such as the reflecting light of: the signal such as temperature and strain and to enter some collimation lenses of collimation lens cluster I through the collimation lens of fiber-optic grating sensor, successively by fiber coupler cluster I, 1 × 4 photoswitch, 2 × 1 fiber couplers, finally enter fiber grating demodulation module, measured by the spectrum of fiber grating demodulation module to reflecting light, and measurement result is transferred on industrial computer and carries out data reduction and storage, and then obtain the machine performance of cylinder,
Along with the rotation of cylinder, the collimation lens of fiber-optic grating sensor is after collimation lens cluster I, will successively through collimation lens cluster IV, collimation lens cluster III and collimation lens cluster II, the collimation lens of reference fiber grating sensor is through the light-transmission characteristics of collimation lens cluster I, and the machine performance that fiber-optic grating sensor will continue three cylinders is measured;
2) if coal mining machine roller is along being rotated counterclockwise, and the initial position of permanent magnet is between magnetic approach switch II and magnetic approach switch III, then after coal mining machine roller starts rotation, first permanent magnet enters the induction zone of magnetic approach switch II, the trigger pip of magnetic approach switch II transfers to industrial computer through trigger pip conditioning module, in conjunction with the drum rotating directional information being stored in industrial computer, industrial computer to 1 × 4 photoswitch pipage control instruction, for the input tail optical fiber of opening 1 × 4 photoswitch and the optical channel exported between tail optical fiber III;
First the output light-wave of wideband light source enters 1 × 4 photoswitch through 2 × 1 fiber couplers, then fiber coupler cluster III is entered by the output tail optical fiber III of 1 × 4 photoswitch, then enter collimation lens cluster III by the output tail optical fiber of fiber coupler cluster III, finally by collimation lens cluster III output beam array;
Certain a branch of light wave of beam array enters fiber-optic grating sensor from the collimation lens of fiber-optic grating sensor, this bundle input light wave is reflected by fiber grating in fiber-optic grating sensor, carry cylinder machine performance such as the reflecting light of: the signal such as temperature and strain and to enter some collimation lenses of collimation lens cluster III through the collimation lens of fiber-optic grating sensor, successively by fiber coupler cluster III, 1 × 4 photoswitch, 2 × 1 fiber couplers, finally enter fiber grating demodulation module, measured by the spectrum of fiber grating demodulation module to reflecting light, and measurement result is transferred on industrial computer and carries out data reduction and storage, and then obtain the machine performance of cylinder,
Along with the rotation of cylinder, the collimation lens of fiber-optic grating sensor is after collimation lens cluster III, will successively through collimation lens cluster IV, collimation lens cluster I and collimation lens cluster II, the collimation lens of reference fiber grating sensor is through the light-transmission characteristics of collimation lens cluster III, and the machine performance that fiber-optic grating sensor will continue three cylinders is measured.
Compared with existing indirect type metering system: the present invention utilizes that the light weight of fiber-optic grating sensor, volume are little, intrinsic insulate, the advantage of electromagnetism interference and passive sensing, introduce the machine performance of fiber-optic grating sensor to coal mining machine roller to measure, not only avoid Explosion-proof Design and the electromagnetism interference design of sensor, also can not have a negative impact to the normal operating conditions of coal mining machine roller;
In addition, adopt the innovative design of " photoswitch+fiber coupler cluster+collimation lens cluster ", solve the transmission of wireless signals difficult problem between fiber-optic grating sensor and wideband light source and fiber grating demodulation module on coal mining machine roller, for light input and transducing signal output structure " putting line " passage of fiber-optic grating sensor, reduce the transmission capacity restriction of transducing signal data, achieving the Simultaneous Monitoring of coal mining machine roller machine performance multiple spot many reference amounts, providing sufficient technical support for completing the monitoring of coal mining machine roller machine performance;
And the present invention has, and measurement range is large, resolution is high and the advantage of fast response time, can not only combine for underground coal mine the accurate evaluation adopting equipment health status and technical support is provided, also can provide technological borrowing for the accurate measurements of other rotary body machine performances, be with a wide range of applications.
Accompanying drawing explanation
Fig. 1 is light channel structure of the present invention and signal control principle schematic diagram;
Fig. 2 is the scheme of installation of coal mining machine roller upper sensor part.
In figure: 1, wideband light source, 2, 2 × 1 fiber couplers, 3, fiber grating demodulation module, 4, 1 × 4 photoswitch, 5, fiber coupler cluster I, 6, fiber coupler cluster II, 7, fiber coupler cluster III, 8, fiber coupler cluster IV, 9, collimation lens cluster I, 10, collimation lens cluster II, 11, collimation lens cluster III, 12, collimation lens cluster IV, 13, annular porose disc, 14, magnetic approach switch I, 15, magnetic approach switch II, 16, magnetic approach switch III, 17, magnetic approach switch IV, 18, trigger pip conditioning module, 19, industrial computer, 20, roller shaft, 21, cylinder, 22, fiber-optic grating sensor, 23, permanent magnet, 24, the collimation lens of fiber-optic grating sensor.
Embodiment
Below in conjunction with accompanying drawing, the invention will be further described.
Wherein, the present invention is with accompanying drawing 1 for benchmark, and left and right, upper and lower, the center of accompanying drawing 1, focus are left and right, upper and lower, center of the present invention, focus.It should be noted that: unless specifically stated otherwise, otherwise positioned opposite, numerical value of the parts of setting forth in the present embodiment etc. is not limited to scope of the present invention.
As depicted in figs. 1 and 2: a kind of coalcutter machine performance fibre-optical sensing device, it comprises:
Wideband light source 1, 2 × 1 fiber couplers 2, fiber grating demodulation module 3, 1 × 4 photoswitch 4, fiber coupler cluster I 5, fiber coupler cluster II 6, fiber coupler cluster III 7, fiber coupler cluster IV 8, collimation lens cluster I 9, collimation lens cluster II 10, collimation lens cluster III 11, collimation lens cluster IV 12, annular porose disc 13, magnetic approach switch I 14, magnetic approach switch II 15, magnetic approach switch III 16, magnetic approach switch IV 17, trigger pip conditioning module 18, industrial computer 19, roller shaft 20, cylinder 21, fiber-optic grating sensor 22, permanent magnet 23, the collimation lens 24 of fiber-optic grating sensor,
The output tail optical fiber of described wideband light source 1 and input tail optical fiber I welding of 2 × 1 fiber couplers 2, the input tail optical fiber of fiber grating demodulation module 3 and input tail optical fiber II welding of 2 × 1 fiber couplers 2, the output tail optical fiber of 2 × 1 fiber couplers 2 and the input tail optical fiber welding of 1 × 4 photoswitch 4;
The output tail optical fiber I of described 1 × 4 photoswitch 4, export tail optical fiber II, export tail optical fiber III, export tail optical fiber IV successively respectively with the input tail optical fiber welding of fiber coupler cluster I 5, fiber coupler cluster II 6, fiber coupler cluster III 7, fiber coupler cluster IV 8;
The output tail optical fiber of fiber coupler cluster I 5 and the tail optical fiber welding of collimation lens cluster I 9, the output tail optical fiber of fiber coupler cluster II 6 and the tail optical fiber welding of collimation lens cluster II 10, the output tail optical fiber of fiber coupler cluster III 7 and the tail optical fiber welding of collimation lens cluster III 11, the output tail optical fiber of fiber coupler cluster IV 8 and the tail optical fiber welding of collimation lens cluster IV 12, collimation lens cluster I 9, collimation lens cluster II 10, collimation lens cluster III 11 and collimation lens cluster IV 12 are uniformly distributed along annular porose disc 13, magnetic approach switch I 14, magnetic approach switch II 15, magnetic approach switch III 16 and magnetic approach switch IV 17 all by screw fastening at annular porose disc 13, and be connected with trigger pip conditioning module 18 by communication cable for mine,
Trigger pip conditioning module 18 is connected by GPIB data line with industrial computer 19, and 1 × 4 photoswitch 4 is connected by RS232 data line with industrial computer 19, and fiber grating demodulation module 3 is connected by RS232 data line with industrial computer 19;
Wherein, cylinder 21 is connected with roller shaft 20, and fiber-optic grating sensor 22 adopts optical fiber ointment to be fixed on cylinder 21, and the collimation lens 24 of fiber-optic grating sensor 22 is embedded in cylinder 21, and permanent magnet 23 is adsorbed in cylinder 21.
Wherein, described wideband light source 1 is ASE wideband light source, operating wavelength range be 1525nm to 1565nm, 8 hours output power stability≤± 0.01dB, degree of polarization≤0.01 of output light-wave, the spectral flatness≤0.5dB of output light-wave, Output optical power >=20mW;
The coupling ratio of 2 × 1 described fiber couplers 2 is 50:50, and input tail optical fiber I, input tail optical fiber II and output tail optical fiber all adopt single-mode fiber SMF-28;
The input power range of described fiber grating demodulation module 3 is-70dBm to-30dBm, wavelength coverage is 1525nm to 1565nm, wavelength resolution is 1pm, wavelength accuracy is ± 40pm, power resolution is 0.1dBm, have RS232 communication interface, input tail optical fiber adopts single-mode fiber SMF-28;
The wavelength coverage of 1 × 4 described photoswitch 4 is 1260nm to 1650nm, adjacent optical channel switching time≤1ms, insertion loss≤0.5dBm, have RS232 communication interface, input tail optical fiber, output tail optical fiber I, output tail optical fiber II, output tail optical fiber III and output tail optical fiber IV all adopt single-mode fiber SMF-28.
Wherein, 1 × 4 fiber coupler that described fiber coupler cluster I 5 is 25:25:25:25 by five coupling ratios is formed, the input tail optical fiber of 1 × 4 fiber coupler I is as the input tail optical fiber of fiber coupler cluster I 5, four of 1 × 4 fiber coupler I export tail optical fibers respectively with 1 × 4 fiber coupler II, 1 × 4 fiber coupler III, the input tail optical fiber welding of 1 × 4 fiber coupler IV and 1 × 4 fiber coupler V, 1 × 4 fiber coupler II, 1 × 4 fiber coupler III, the output tail optical fiber of 1 × 4 fiber coupler IV and 1 × 4 fiber coupler V is as the output tail optical fiber of fiber coupler cluster I 5, the output tail optical fiber number of fiber coupler cluster I 5 is 16,
Fiber coupler cluster II 6, fiber coupler cluster III 7 and fiber coupler cluster IV 8 all adopt the constructive method of fiber coupler cluster I 5; Input tail optical fiber and the output tail optical fiber of fiber coupler cluster I 5, fiber coupler cluster II 6, fiber coupler cluster III 7 and fiber coupler cluster IV 8 all adopt single-mode fiber SMF-28.
Wherein, described collimation lens cluster I 9 is made up of 16 collimation lenses, the range of each collimation lens is 0.38 to 0.49, clear aperature >=the 3.6mm of each collimation lens, beam divergence angle is 0.2 ° to 0.3 °, insertion loss < 0.05dB, the anti-reflection film scope of collimation lens is 1050nm to 1620nm; Collimation lens cluster II 10, collimation lens cluster III 11 and collimation lens cluster IV 12 all adopt the constructive method of collimation lens cluster I 9;
The tail optical fiber of collimation lens cluster I 9, collimation lens cluster II 10, collimation lens cluster III 11 and collimation lens cluster IV 12 all adopts single-mode fiber SMF-28; Collimation lens cluster I 9, collimation lens cluster II 10, collimation lens cluster III 11 and collimation lens cluster IV 12 are distributed in same circular trace.
Wherein, described annular porose disc 13 passes through casting, and the mounting hole of reserved collimation lens cluster I 9, collimation lens cluster II 10, collimation lens cluster III 11 and collimation lens cluster IV 12, annular porose disc 13 has identical cross sectional dimensions with cylinder 21, the xsect center of circle of annular porose disc 13 is coaxial with the xsect center of circle of cylinder 21, the xsect of the annular xsect of porose disc 13 and cylinder 21 is parallel to each other, annular porose disc 13 is directly welded on the rocking arm of coalcutter, with the roller shaft 20 of coalcutter without annexation.
Wherein, described magnetic approach switch I 14, magnetic approach switch II 15, magnetic approach switch III 16 and magnetic approach switch IV 17 adopt dry-reed approach switch, and select essential safety type, and output state is open type, serviceable life >=1,000,000 times;
The trigger pip of described trigger pip conditioning module 18 Real-time Collection magnetic approach switch I 14, magnetic approach switch II 15, magnetic approach switch III 16 and magnetic approach switch IV 17, trigger pip is amplified and filtering process, and convert the digital signal that industrial computer 19 can identify to, trigger pip conditioning module 18 has GPIB communication interface, to single channel trigger pip response time≤2.5ms.
Temperature and the strain of fiber-optic grating sensor 22 pairs of cylinders 21 are wherein measured simultaneously, with the machine performance of Real-Time Monitoring cylinder 21, the operating wavelength range of fiber-optic grating sensor 22 is 1525nm to 1565nm, optical grating reflection rate >=90%, wherein, temperature measurement range is-40 DEG C to 120 DEG C, and temperature resolution is 0.1 DEG C, strain measurement scope is ± 1500 μ ε, and strain resolution is 0.5 μ ε.
Wherein, described permanent magnet 23 adopts square ferrite permanent-magnet iron, is of a size of 100mm × 60mm × 15mm, is convenient to be adsorbed on cylinder 21.
And, the collimation lens 24 of described fiber-optic grating sensor has identical performance index with the collimation lens of collimation lens cluster I 9, and the initial position of the collimation lens 24 of fiber-optic grating sensor is aimed at the initial position of some collimation lenses of collimation lens cluster I 9, collimation lens cluster II 10, collimation lens cluster III 11 and collimation lens cluster IV 12.
The invention also discloses a kind of method for sensing utilizing coal mining machine roller fibre-optical sensing device to carry out simultaneously, comprise following process: coal mining machine roller 21 turn clockwise machine performance monitoring and coal mining machine roller 21 be rotated counterclockwise machine performance monitor; Specific as follows:
1) when coal mining machine roller 21 is along turning clockwise, and the initial position of permanent magnet 23 is between magnetic approach switch II 15 and magnetic approach switch III 16, then after coal mining machine roller 21 starts rotation, first permanent magnet 23 enters the induction zone of magnetic approach switch III 16, the trigger pip of magnetic approach switch III 16 transfers to industrial computer 19 through trigger pip conditioning module 18, in conjunction with the cylinder 21 sense of rotation information being stored in industrial computer 19, industrial computer 19 is to 1 × 4 photoswitch 4 pipage control instruction, for opening the optical channel between the input tail optical fiber of 1 × 4 photoswitch 4 and output tail optical fiber I,
Now, first the output light-wave of wideband light source 1 enters 1 × 4 photoswitch 4 through 2 × 1 fiber couplers 2, then fiber coupler cluster I 5 is entered by the output tail optical fiber I of 1 × 4 photoswitch 4, then enter collimation lens cluster I 9 by the output tail optical fiber of fiber coupler cluster I 5, finally by collimation lens cluster I 9 output beam array;
Certain a branch of light wave of beam array enters fiber-optic grating sensor 22 from the collimation lens 24 of fiber-optic grating sensor 22, this bundle input light wave is reflected by fiber grating in fiber-optic grating sensor 22, the reflecting light carrying cylinder machine performance (as: temperature and strain etc.) signal enters some collimation lenses of collimation lens cluster I 9 through the collimation lens 24 of fiber-optic grating sensor 22, successively by fiber coupler cluster I 5, 1 × 4 photoswitch 4, 2 × 1 fiber couplers 2, finally enter fiber grating demodulation module 3, measured by the spectrum of fiber grating demodulation module 3 pairs of reflecting lights, and measurement result is transferred on industrial computer 19 and carries out data reduction and storage, and then obtain the machine performance of cylinder 21,
Along with the rotation of cylinder 21, the collimation lens 24 of fiber-optic grating sensor 22 is after collimation lens cluster I 9, will successively through collimation lens cluster IV 12, collimation lens cluster III 11 and collimation lens cluster II 10, the collimation lens 24 of reference fiber grating sensor 22 is through the light-transmission characteristics of collimation lens cluster I 9, and the machine performance that fiber-optic grating sensor 22 will continue three cylinders 21 is measured;
2) when coal mining machine roller 21 is along being rotated counterclockwise, and the initial position of permanent magnet 23 is between magnetic approach switch II 15 and magnetic approach switch III 16, then after coal mining machine roller 21 starts rotation, first permanent magnet 23 enters the induction zone of magnetic approach switch II 15, the trigger pip of magnetic approach switch II 15 transfers to industrial computer 19 through trigger pip conditioning module 18, in conjunction with the cylinder 21 sense of rotation information being stored in industrial computer 19, industrial computer 19 is to 1 × 4 photoswitch 4 pipage control instruction, for opening the optical channel between the input tail optical fiber of 1 × 4 photoswitch 4 and output tail optical fiber III,
Now, first the output light-wave of wideband light source 1 enters 1 × 4 photoswitch 4 through 2 × 1 fiber couplers 2, then fiber coupler cluster III 7 is entered by the output tail optical fiber III of 1 × 4 photoswitch 4, then enter collimation lens cluster III 11 by the output tail optical fiber of fiber coupler cluster III 7, finally by collimation lens cluster III 11 output beam array;
Certain a branch of light wave of beam array enters fiber-optic grating sensor 22 from the collimation lens 24 of fiber-optic grating sensor 22, this bundle input light wave is reflected by fiber grating in fiber-optic grating sensor 22, the reflecting light carrying cylinder machine performance (as temperature and strain etc.) signal enters some collimation lenses of collimation lens cluster III 11 through the collimation lens 24 of fiber-optic grating sensor 22, successively by fiber coupler cluster III 7, 1 × 4 photoswitch 4, 2 × 1 fiber couplers 2, finally enter fiber grating demodulation module 3, measured by the spectrum of fiber grating demodulation module 3 pairs of reflecting lights, and measurement result is transferred on industrial computer 19 and carries out data reduction and storage, and then obtain the machine performance of cylinder 21,
Along with the rotation of cylinder 21, the collimation lens 24 of fiber-optic grating sensor 22 is after collimation lens cluster III 11, will successively through collimation lens cluster IV 12, collimation lens cluster I 9 and collimation lens cluster II 10, the collimation lens 24 of reference fiber grating sensor 22 is through the light-transmission characteristics of collimation lens cluster III 11, and the machine performance that fiber-optic grating sensor 22 will continue three cylinders 21 is measured.
Compared with existing indirect type metering system: the present invention utilizes that the light weight of fiber-optic grating sensor 22, volume are little, intrinsic insulate, the advantage of electromagnetism interference and passive sensing, the machine performance introducing fiber-optic grating sensor 22 pairs of coal mining machine rollers 21 is measured, not only avoid Explosion-proof Design and the electromagnetism interference design of sensor, also can not have a negative impact to the normal operating conditions of coal mining machine roller 21;
In addition, adopt the innovative design of " photoswitch+fiber coupler cluster+collimation lens cluster ", solve the transmission of wireless signals difficult problem between fiber-optic grating sensor 22 and wideband light source 1 and fiber grating demodulation module 3 on coal mining machine roller 21, for light input and transducing signal output structure " putting line " passage of fiber-optic grating sensor 22, reduce the transmission capacity restriction of transducing signal data, achieving the Simultaneous Monitoring of coal mining machine roller 21 machine performance multiple spot many reference amounts, providing sufficient technical support for completing the monitoring of coal mining machine roller 21 machine performance;
And the present invention has, and measurement range is large, resolution is high and the advantage of fast response time, can not only combine for underground coal mine the accurate evaluation adopting equipment health status and technical support is provided, also can provide technological borrowing for the accurate measurements of other rotary body machine performances, be with a wide range of applications.
To those skilled in the art, obviously the invention is not restricted to the details of above-mentioned one exemplary embodiment, and when not deviating from spirit of the present invention or essential characteristic, the present invention can be realized in other specific forms.Therefore, no matter from which point, all should embodiment be regarded as exemplary, and be nonrestrictive, scope of the present invention is limited by claims instead of above-mentioned explanation, and all changes be therefore intended in the implication of the equivalency by dropping on claim and scope are included in the present invention.Any Reference numeral in claim should be considered as the claim involved by limiting.
The above; be only preferred embodiment of the present invention; not in order to limit the present invention, every above embodiment is done according to technical spirit of the present invention any trickle amendment, equivalently replace and improve, within the protection domain that all should be included in technical solution of the present invention.
Claims (10)
1. a coalcutter machine performance fibre-optical sensing device, is characterized in that, it comprises:
Wideband light source (1), 2 × 1 fiber couplers (2), fiber grating demodulation module (3), 1 × 4 photoswitch (4), fiber coupler cluster I (5), fiber coupler cluster II (6), fiber coupler cluster III (7), fiber coupler cluster IV (8), collimation lens cluster I (9), collimation lens cluster II (10), collimation lens cluster III (11), collimation lens cluster IV (12), annular porose disc (13), magnetic approach switch I (14), magnetic approach switch II (15), magnetic approach switch III (16), magnetic approach switch IV (17), trigger pip conditioning module (18), industrial computer (19), roller shaft (20), cylinder (21), fiber-optic grating sensor (22), the collimation lens (24) of permanent magnet (23) and fiber-optic grating sensor,
The output tail optical fiber of described wideband light source (1) and input tail optical fiber I welding of 2 × 1 fiber couplers (2), the input tail optical fiber of fiber grating demodulation module (3) and input tail optical fiber II welding of 2 × 1 fiber couplers (2), the output tail optical fiber of 2 × 1 fiber couplers (2) and the input tail optical fiber welding of 1 × 4 photoswitch (4);
The output tail optical fiber I of described 1 × 4 photoswitch (4), export tail optical fiber II, export tail optical fiber III, export tail optical fiber IV successively respectively with the input tail optical fiber welding of fiber coupler cluster I (5), fiber coupler cluster II (6), fiber coupler cluster III (7), fiber coupler cluster IV (8);
The output tail optical fiber of described fiber coupler cluster I (5) and the tail optical fiber welding of collimation lens cluster I (9), the output tail optical fiber of fiber coupler cluster II (6) and the tail optical fiber welding of collimation lens cluster II (10), the output tail optical fiber of fiber coupler cluster III (7) and the tail optical fiber welding of collimation lens cluster III (11), the output tail optical fiber of fiber coupler cluster IV (8) and the tail optical fiber welding of collimation lens cluster IV (12);
Collimation lens cluster I (9), collimation lens cluster II (10), collimation lens cluster III (11) and collimation lens cluster IV (12) are uniformly distributed along annular porose disc (13); Magnetic approach switch I (14), magnetic approach switch II (15), magnetic approach switch III (16) and magnetic approach switch IV (17) all by screw fastening in annular porose disc (13), and each proximity switch is connected with trigger pip conditioning module (18) by communication cable for mine;
Trigger pip conditioning module (18) is connected by GPIB data line with industrial computer (19), 1 × 4 photoswitch (4) is connected by RS232 data line with industrial computer (19), and fiber grating demodulation module (3) is connected by RS232 data line with industrial computer (19);
Wherein, described cylinder (21) is connected with roller shaft (20), fiber-optic grating sensor (22) adopts optical fiber ointment to be fixed on cylinder (21), the collimation lens (24) of fiber-optic grating sensor is embedded in cylinder (21), and permanent magnet (23) is adsorbed on cylinder (21).
2. a kind of coalcutter machine performance fibre-optical sensing device according to claim 1, it is characterized in that, described wideband light source (1) is ASE wideband light source, operating wavelength range be 1525nm to 1565nm, 8 hours output power stability≤± 0.01dB, degree of polarization≤0.01 of output light-wave, the spectral flatness≤0.5dB of output light-wave, Output optical power >=20mW;
The coupling ratio of described 2 × 1 fiber couplers (2) is 50:50, and input tail optical fiber I, input tail optical fiber II and output tail optical fiber all adopt single-mode fiber SMF-28;
The input power range of described fiber grating demodulation module (3) is-70dBm to-30dBm, wavelength coverage is 1525nm to 1565nm, wavelength resolution is 1pm, wavelength accuracy is ± 40pm, power resolution is 0.1dBm, have RS232 communication interface, input tail optical fiber adopts single-mode fiber SMF-28;
The wavelength coverage of described 1 × 4 photoswitch (4) is 1260nm to 1650nm, adjacent optical channel switching time≤1ms, insertion loss≤0.5dBm, have RS232 communication interface, input tail optical fiber, output tail optical fiber I, output tail optical fiber II, output tail optical fiber III and output tail optical fiber IV all adopt single-mode fiber SMF-28.
3. a kind of coalcutter machine performance fibre-optical sensing device according to claim 1, it is characterized in that, 1 × 4 fiber coupler that described fiber coupler cluster I (5) is 25:25:25:25 by five coupling ratios is formed, the input tail optical fiber of 1 × 4 fiber coupler I is as the input tail optical fiber of fiber coupler cluster I (5), four of 1 × 4 fiber coupler I export tail optical fibers respectively with 1 × 4 fiber coupler II, 1 × 4 fiber coupler III, the input tail optical fiber welding of 1 × 4 fiber coupler IV and 1 × 4 fiber coupler V, 1 × 4 fiber coupler II, 1 × 4 fiber coupler III, the output tail optical fiber of 1 × 4 fiber coupler IV and 1 × 4 fiber coupler V is as the output tail optical fiber of fiber coupler cluster I (5), the output tail optical fiber number of fiber coupler cluster I (5) is 16,
Fiber coupler cluster II (6), fiber coupler cluster III (7) and fiber coupler cluster IV (8) all adopt the constructive method of fiber coupler cluster I (5); Input tail optical fiber and the output tail optical fiber of fiber coupler cluster I (5), fiber coupler cluster II (6), fiber coupler cluster III (7) and fiber coupler cluster IV (8) all adopt single-mode fiber SMF-28.
4. a kind of coalcutter machine performance fibre-optical sensing device according to claim 1, it is characterized in that, described collimation lens cluster I (9) is made up of 16 collimation lenses, the range of each collimation lens is 0.38 to 0.49, clear aperature >=the 3.6mm of each collimation lens, beam divergence angle is 0.2 ° to 0.3 °, insertion loss < 0.05dB, and the anti-reflection film scope of collimation lens is 1050nm to 1620nm; Collimation lens cluster II (10), collimation lens cluster III (11) and collimation lens cluster IV (12) all adopt the constructive method of collimation lens cluster I (9);
The tail optical fiber of collimation lens cluster I (9), collimation lens cluster II (10), collimation lens cluster III (11) and collimation lens cluster IV (12) all adopts single-mode fiber SMF-28; Collimation lens cluster I (9), collimation lens cluster II (10), collimation lens cluster III (11) and collimation lens cluster IV (12) are distributed in same circular trace.
5. a kind of coalcutter machine performance fibre-optical sensing device according to claim 1, it is characterized in that, described annular porose disc (13) passes through casting, and reserved collimation lens cluster I (9), collimation lens cluster II (10), the mounting hole of collimation lens cluster III (11) and collimation lens cluster IV (12), annular porose disc (13) has identical cross sectional dimensions with cylinder (21), the xsect center of circle of annular porose disc (13) is coaxial with the xsect center of circle of cylinder (21), xsect and the xsect of cylinder (21) of annular porose disc (13) are parallel to each other, annular porose disc (13) is directly welded on the rocking arm of coalcutter, with the roller shaft (20) of coalcutter without annexation.
6. a kind of coalcutter machine performance fibre-optical sensing device according to claim 1, it is characterized in that, described magnetic approach switch I (14), magnetic approach switch II (15), magnetic approach switch III (16) and magnetic approach switch IV (17) adopt dry-reed approach switch, and select essential safety type, output state is open type, serviceable life >=1,000,000 times;
The trigger pip of described trigger pip conditioning module (18) Real-time Collection magnetic approach switch I (14), magnetic approach switch II (15), magnetic approach switch III (16) and magnetic approach switch IV (17), trigger pip is amplified and filtering process, and convert the digital signal that industrial computer (19) can identify to, trigger pip conditioning module (18) has GPIB communication interface, to single channel trigger pip response time≤2.5ms.
7. a kind of coal mining machine roller machine performance fibre-optical sensing device according to claim 1, it is characterized in that, described fiber-optic grating sensor (22) is measured the temperature of cylinder (21) and strain simultaneously, with the machine performance of Real-Time Monitoring cylinder (21), the operating wavelength range of fiber-optic grating sensor (22) is 1525nm to 1565nm, optical grating reflection rate >=90%, wherein, temperature measurement range is-40 DEG C to 120 DEG C, temperature resolution is 0.1 DEG C, strain measurement scope is ± 1500 μ ε, and strain resolution is 0.5 μ ε.
8. a kind of coal mining machine roller machine performance fibre-optical sensing device according to claim 1, is characterized in that, described permanent magnet (23) adopts square ferrite permanent-magnet iron, is of a size of 100mm × 60mm × 15mm.
9. a kind of coal mining machine roller machine performance fibre-optical sensing device according to claim 1, it is characterized in that, the collimation lens (24) of described fiber-optic grating sensor has identical performance index with the collimation lens of collimation lens cluster I (9), and the initial position of the collimation lens (24) of fiber-optic grating sensor is aimed at the initial position of some collimation lenses of collimation lens cluster I (9), collimation lens cluster II (10), collimation lens cluster III (11) and collimation lens cluster IV (12).
10. a coal mining machine roller optical fiber sensing method, is characterized in that, comprise coal mining machine roller (21) turn clockwise machine performance monitoring and coal mining machine roller (21) be rotated counterclockwise machine performance observation process:
1) when coal mining machine roller (21) is along turning clockwise, and the initial position of permanent magnet (23) is positioned between magnetic approach switch II (15) and magnetic approach switch III (16), then after coal mining machine roller (21) starts rotation, permanent magnet (23) first enters the induction zone of magnetic approach switch III (16), the trigger pip of magnetic approach switch III (16) transfers to industrial computer (19) through trigger pip conditioning module (18), in conjunction with cylinder (21) the sense of rotation information being stored in industrial computer (19), industrial computer (19) is to 1 × 4 photoswitch (4) pipage control instruction, for opening the optical channel between the input tail optical fiber of 1 × 4 photoswitch (4) and output tail optical fiber I,
The output light-wave of wideband light source (1) first enters 1 × 4 photoswitch (4) through 2 × 1 fiber couplers (2), then fiber coupler cluster I (5) is entered by the output tail optical fiber I of 1 × 4 photoswitch (4), then enter collimation lens cluster I (9) by the output tail optical fiber of fiber coupler cluster I (5), finally by collimation lens cluster I (9) output beam array;
Certain a branch of light wave of beam array enters fiber-optic grating sensor (22) from the collimation lens (24) of fiber-optic grating sensor (22), this bundle input light wave is reflected by fiber grating in fiber-optic grating sensor (22), carry some collimation lenses that the collimation lens (24) of reflecting light through fiber-optic grating sensor (22) that cylinder machine performance comprises temperature and strain signal enters collimation lens cluster I (9), successively by fiber coupler cluster I (5), 1 × 4 photoswitch (4), 2 × 1 fiber couplers (2), finally enter fiber grating demodulation module (3), measured by fiber grating demodulation module (3) spectrum to reflecting light, and measurement result is transferred on industrial computer (19) and carries out data reduction and storage, and then obtain the machine performance of cylinder (21),
Along with the rotation of cylinder (21), the collimation lens (24) of fiber-optic grating sensor (22) is after collimation lens cluster I (9), will successively through collimation lens cluster IV (12), collimation lens cluster III (11) and collimation lens cluster II (10), the collimation lens (24) of reference fiber grating sensor (22) is through the light-transmission characteristics of collimation lens cluster I (9), and the machine performance that fiber-optic grating sensor (22) will continue three cylinders (21) is measured;
2) when coal mining machine roller (21) is along being rotated counterclockwise, and the initial position of permanent magnet (23) is positioned between magnetic approach switch II (15) and magnetic approach switch III (16), then after coal mining machine roller (21) starts rotation, permanent magnet (23) first enters the induction zone of magnetic approach switch II (15), the trigger pip of magnetic approach switch II (15) transfers to industrial computer (19) through trigger pip conditioning module (18), in conjunction with cylinder (21) the sense of rotation information being stored in industrial computer (19), industrial computer (19) is to 1 × 4 photoswitch (4) pipage control instruction, for opening the optical channel between the input tail optical fiber of 1 × 4 photoswitch (4) and output tail optical fiber III,
The output light-wave of wideband light source (1) first enters 1 × 4 photoswitch (4) through 2 × 1 fiber couplers (2), then fiber coupler cluster III (7) is entered by the output tail optical fiber III of 1 × 4 photoswitch (4), then enter collimation lens cluster III (11) by the output tail optical fiber of fiber coupler cluster III (7), finally by collimation lens cluster III (11) output beam array;
Certain a branch of light wave of beam array enters fiber-optic grating sensor (22) from the collimation lens (24) of fiber-optic grating sensor (22), this bundle input light wave is reflected by fiber grating in fiber-optic grating sensor (22), carry some collimation lenses that the collimation lens (24) of reflecting light through fiber-optic grating sensor (22) that cylinder machine performance comprises temperature and strain signal enters collimation lens cluster III (11), successively by fiber coupler cluster III (7), 1 × 4 photoswitch (4), 2 × 1 fiber couplers (2), finally enter fiber grating demodulation module (3), measured by fiber grating demodulation module (3) spectrum to reflecting light, and measurement result is transferred on industrial computer (19) and carries out data reduction and storage, and then obtain the machine performance of cylinder (21),
Along with the rotation of cylinder (21), the collimation lens (24) of fiber-optic grating sensor (22) is after collimation lens cluster III (11), will successively through collimation lens cluster IV (12), collimation lens cluster I (9) and collimation lens cluster II (10), the collimation lens (24) of reference fiber grating sensor (22) is through the light-transmission characteristics of collimation lens cluster III (11), and the machine performance that fiber-optic grating sensor (22) will continue three cylinders (21) is measured.
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| CN110132854A (en) * | 2019-04-25 | 2019-08-16 | 中国矿业大学 | For the angular displacement spectral device of dynamic coal rock detection |
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