A kind of optical fiber sensing device and method of shearer mechanical state

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 [0001] The invention relates to a coal mining machine mechanical monitoring device and monitoring method, in particular to a coal mining machine mechanical state optical fiber sensing device and method, belonging to the technical field of fully mechanized mining equipment health state monitoring. Background technique [0002] Coal is my country's main energy consumption and raw material, and my country is currently the largest coal producer and consumer in the world. In view of my country's energy status of "rich in coal, poor in oil, and low in gas", in a long period of time in the future, the main body of coal will be The status of energy will not change. Whether the coal industry can develop steadily is closely related to my country's energy security and sustainable economic development. [0003] The shearer is an important large-scale production equipment in coal mines, and it is an important symbol of the digitization, automation and mechanization of coal...

AI Technical Summary

Problems solved by technology

[0009] 2) The drum of the coal mining machine is a rotating body, and the sensor on the drum and the sensor signal processing module cannot be connected by wires, and there are strict requirements on the transmission mode of the sensor signal;

[0013] 1) In the prior art (3), the shaft module is an active sensor. Before it is used for the mechanical state monitoring of the shearer drum, a strict explosion-proof design is required, which will lead to a significant increase in the volume and mass of the shaft module. If the It is installed on the shearer drum, which will have a negative impact on the normal working state of the shearer drum;

[0014] 2) The coal mine fully mechanized mining face belongs to a strong electromagnetic interference environment. In the prior art (3), it is difficult for the optical signal transmitting MCU and A / D conversion unit of the shaft module to work normally in a strong electromagnetic interference environment;

[0015] 3) In the existing technology (3), the transmission mode of the sensing signal between the rotating shaft module and the fixed module is "point-to-point" transmission, which limits the transmission capacity of sensing data, and it is impossible to realize multi-point and multi-point transmission of the shearer drum. Synchronous monitoring of parameters. In addition, extremely high requirements are placed on the response capability of the rotating shaft module and the fixed module and the environmental stability during data transmission;

[0016] In summary, the prior art (3) cannot be combined with the field of shearer technology, and thus is not suitable for the monitoring of the mechanical state of the shearer drum

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