Limit protection control method, device and system, and engineering machine

Abstract

The invention provides a limit protection control method. The control method comprises the following steps of: receiving a radio frequency induction signal output by a radio frequency signal receiver, and transmitting the radio frequency induction signal to the radio frequency signal receiver after a radio frequency inductor positioned at a limited structure is activated by a radio frequency signal electromagnetic field transmitted by the radio frequency signal receiver; and performing limit protection on the limited structure according to the radio frequency induction signal and a preset guard distance between the radio frequency inductor positioned at the limited structure and the radio frequency signal receiver. In addition, the invention also provides a limit protection control device, a limit protection control system and an engineering machine. By the technical scheme, the position of the limited structure can be accurately detected, so that limit protection can be performed by taking measures in time, and losses caused by security incidents can be prevented.

Description

technical field [0001] The invention relates to the field of mechanical safety control, in particular to a limit protection control method, controller, system and engineering machinery. Background technique [0002] In the mechanical field, due to the need for safe operation, some specific structures need to be limited to prevent safety accidents. For example, if the hoisting equipment does not limit the hoisting height when the hoisting parts are lifted, it is easy to cause a safety accident in which the hoisting equipment overturns. In the prior art, at present, mechanical touch limit switches, electromagnetic induction proximity switches, ultrasonic ranging, and infrared and laser detection are mainly used for limit control. However, the mechanical touch limit switch completes the limit through physical contact, and there is physical wear and tear during use, which will cause problems such as switch failure; the electromagnetic induction proximity switch has a short dete...

AI Technical Summary

Problems solved by technology

However, the mechanical touch limit switch completes the limit through physical contact, and there is physical wear and tear during use, which will cause problems such as switch failure; the electromagnetic induction proximity switch has a short detection distance, and the sensing distance is only a few centimeters; The accuracy is not enough for a long time, and the distance detection will be inaccurate when encountering other obstructions during the ultrasonic transmission process; infrared and laser detection are easily affected by obstructions, and the working conditions on the construction site are harsh, and oil, dust, and mud will affect the transmission of the signal and receive

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