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

A limit protection and control method technology, which is applied in the field of controllers, limit protection control methods, and construction machinery, can solve the problems of short distance, only a few centimeters of sensing distance, insufficient precision, physical wear and other problems, and achieve fast communication speed and anti-corrosion. Electrostatic performance, effect of small amount of data

Inactive Publication Date: 2012-10-17
ZOOMLION HEAVY IND CO LTD
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  • Abstract
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  • Claims
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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

Method used

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

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Embodiment Construction

[0014] The embodiment of the present invention provides a limit protection control method, which uses the characteristics of radio frequency signals to perform limit protection. The equipment implementing the limit protection control method includes a radio frequency sensor, a radio frequency signal receiver, a controller and a limit protection actuator, such as figure 1 As shown, the specific steps are as follows:

[0015] S101. Receive the radio frequency induction signal output by the radio frequency signal receiver, and the radio frequency induction signal is sent to the radio frequency signal receiver after being activated by the radio frequency signal electromagnetic field emitted by the radio frequency signal receiver by the radio frequency sensor located at the limited structure;

[0016] Specifically, the radio frequency sensor is installed at the limited structure, and the radio frequency signal receiver is located on the opposite side of the limited structure in the...

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PUM

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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...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G05B19/04G01S11/02
Inventor 吴利清罗建利陈华川胡杰毛彦淇
Owner ZOOMLION HEAVY IND CO LTD
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