Wireless distance measuring device and wireless distance measuring method for hydraulic supports, and hydraulic support using device and method

Abstract

The invention discloses a wireless distance measuring device and a wireless distance measuring method for hydraulic supports, and a hydraulic support using the device and the method. The wireless distance measuring device comprises a wireless transceiver and a support controller, wherein the support controller can carry out control on the unit advance of a hydraulic support; and the wireless distance measuring device is characterized in that the wireless transceiver is electrically connected with the support controller; the wireless transceiver comprises an emitting module, a receiving moduleand a communication circuit, wherein the emitting module is used for emitting a laser signal to a target arranged on a cable trough of a scraper conveyor in front of the hydraulic support; the receiving module is used for receiving a laser signal reflected back by the target, and calculating a distance between the wireless transceiver and the target according to a time interval between signal emitting and signal receiving; the communication circuit converts the distance into an electrical signal form and transmitting the electrical signal to the support controller; and the support controller carries out control on the unit advance of the hydraulic support.

Description

technical field [0001] The invention relates to a wireless distance measuring device for a hydraulic support and its application, in particular to a stroke control device for a hydraulic support in the process of moving and sliding. Background technique [0002] The hydraulic support is the key equipment in the fully mechanized mining face of the coal mine. The use of the support electro-hydraulic control system is the main way to improve the production efficiency of the coal mine. The key process of the hydraulic support is the movement control of the support. The existing support electro-hydraulic control system generally uses the reed switch The type of stroke sensor is used to detect the stroke of the bracket. It is necessary to drill a deep hole on the piston rod of the oil cylinder and put the sensor in. The sensor is required to have better straightness, coaxiality and higher pressure resistance. For the sensor At the same time, because the reed switch is easily damag...

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Problems solved by technology

[0002] The hydraulic support is the key equipment in the fully mechanized mining face of the coal mine. The use of the support electro-hydraulic control system is the main way to improve the production efficiency of the coal mine. The key process of the hydraulic support is the movement control of the support. The existing support electro-hydraulic control system generally uses the reed switch The type of stroke sensor is used to detect the stroke of the bracket. It is necessary to drill a deep hole on the piston rod of the oil cylinder and put the sensor in. The sensor is required to have better straightness, coaxiality and higher pressure resistance. For the sensor At the same time, because the reed switch is easily damaged after being subjected to strong vibration and impact, it is easy to be damaged during production and use. Due to the push of the bracket, the oil cylinder is installed at the bottom of the bracket, and the connector of the travel sensor often It will be buried in floating coal and gangue, and it will be easily damaged by motion friction. After the sensor fails, it is difficult to replace it underground

In addition, because the bracket and the scraper conveyor are connected by the push rod through the pin lug, after multiple shifts, the error of the pushing step due to the fit gap of the pin lug bracket is getting bigger and bigger, and scraper conveyor needs to be carried out regularly Adjustment of machine straightness travel

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