Automatic early warning device and method of coal mining machine transient detection

Abstract

The invention discloses an automatic early warning device and method of coal mining machine transient detection. The method comprises the steps that a Roche coil is wound on a cutting motor power line; when current flows through the power line, the current sensed by the Roche coil is acquired by a current integrator; a vibration sensor is placed in an electric cabinet of a coal mining machine, andwhen the coal mining machine works, generated mechanical motion acceleration is induced by an acceleration sensor arranged inside and is then reflected as the vibration amount; signals of two currentsensors and the vibration sensor are acquired in real time, a special algorithm combining a current curve and a vibration curve is adopted, the working state of a cutting head of the coal mining machine is comprehensively judged, and the effect of the cutting head of the coal mining machine is protected timely. The automatic early warning device and method have the advantages that the design of acontrol processor with a field programmable door array (FPGA) being the core is adopted by a main control unit, and a related control time sequence, current data, vibration data, data communication and calculation are parallelly treated at high speed to guarantee the accuracy, the stability and the timeliness of synchronous detection data.

Description

technical field [0001] The invention belongs to the technical field of intelligent coal mining machinery, and in particular relates to an automatic early warning device and method for transient detection of a coal mining machine. technical background [0002] When the cutting head of the coal mining machine in the mine is working, it often encounters the support iron frame or other hard iron ore. Some damage will affect the safety performance and coal mining efficiency. At present, to solve this problem, the method of monitoring the current of the main motor coil is mainly used to indirectly judge whether the cutting is abnormal. The current value is generally detected by a conventional mutual inductance coil. This detection method has obvious disadvantages such as slow speed and poor accuracy. extremely low. Contents of the invention [0003] In view of the above-mentioned technical defects, the present invention provides an automatic early warning device and method for...

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Problems solved by technology

[0002] When the cutting head of the coal mining machine in the mine is working, it often encounters the support iron frame or other hard iron ore. Some damage will affect the safety performance and coal mining efficiency

At present, to solve this problem, the method of monitoring the current of the main motor coil is mainly used to indirectly judge whether the cutting is abnormal. The current value is generally detected by a conventional mutual inductance coil. This detection method has obvious disadvantages such as slow speed and poor accuracy. extremely low

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