Detection sensor and detection method for angle of rocker arm of coal cutter

Abstract

The invention discloses a detection sensor and a detection method for an angle of a rocker arm of a coal cutter. The sensor includes a base, a base top cover and a rocking bar; the base is connected with a revolving shaft, and the rocking bar is fixedly connected with the revolving shaft; one end of the rocking bar that is not fixedly connected with the revolving shaft is connected with a connection base; the top of the revolving shaft is provided with circular magnetic steel; the top of the base top cover is connected with a sensor protective shell; an inner cavity of the sensor protective shell is a circuit board installation cavity and a sensor circuit board is installed in the circuit board installation cavity; the sensor circuit board is integrated with a sensor circuit; and the sensor circuit includes a microprocessor module, a power supply module, a communication module, an angle sensor, and a display module. The method includes the following steps: 1. installing the sensor; and2. detecting the angle of the rocker arm of the coal cutter. The sensor is novel and reasonable in design, is convenient to implement, is good in work stability and reliability, is strong in anti-interference capability, is high in detection precision, provides guarantee for realization of automatic height adjustment of the coal cutter, is strong in practicability, and is convenient for popularization and usage.

Description

technical field [0001] The invention belongs to the technical field of automatic height adjustment of coal shearers, and in particular relates to a coal shearer rocker arm angle detection sensor and a detection method. Background technique [0002] The automatic height adjustment of the shearer is one of the key technologies to realize the automation, intelligence and unmanned operation of fully mechanized mining. Due to the influence of geological factors, the shape and thickness of the coal seam are different. During the working process, the shearer needs to adjust the cutting height of the drum according to the distribution of the coal seam. The height adjustment of the shearer drum is realized by swinging the rocker arm around the pin shaft hinged with the fuselage. Therefore, the real-time and accurate measurement of the height of the cutting drum becomes the primary link of the automatic height adjustment of the shearer. In recent years, the research and application o...

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Problems solved by technology

[0003] The Eickhoff SL shearer adopts the method of installing a piston telescopic displacement sensor in the hydraulic cylinder to measure the height of the drum. This method is difficult to install and maintain. Once the sensor is damaged, the entire cylinder needs to be replaced; There are still relatively few methods for installing angle sensors, and most of them use encoders. For this type of method, there will be problems such as cable interference, insufficient space, improper interface, serious sensor wear, and relatively high failure rate when selecting sensors.

Using the displacement sensor to directly measure the height requires installing the sensor on the rocker arm or directly inside the drum. For the mining conditions of the coal mining machine, this method is difficult to implement and requires high anti-interference ability and precision of the sensor.

[0004] In the prior art, there is still a lack of a shearer rocker arm angle detection sensor and detection method that can well meet the needs of use

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