A shielding layer variable grounding control device, system, method and construction machinery
A control device and shielding layer technology, applied in the fields of magnetic field/electric field shielding, electrical components, etc., can solve the problems of difficulty in achieving shielding effect, affecting the stability of the electronic control system, and difficult to achieve anti-interference ability, and achieve the goal of improving anti-interference ability. Effect
Active Publication Date: 2015-11-25
ZOOMLION HEAVY IND CO LTD
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Problems solved by technology
However, it is difficult to achieve a good shielding effect in different interference environments with a fixed shielding grounding method
For mobile equipment such as construction machinery, due to the frequent changes in the construction environment, it may face various interference sources, such as high-voltage power lines, radio broadcasting towers, mobile phone communication towers, pulse towers, etc. If the shielding of the electrical system With a fixed grounding mode, it is difficult to achieve good anti-interference ability, and even affect the stability of the electronic control system
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[0019] Specific embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings. It should be understood that the specific embodiments described here are only used to illustrate and explain the present invention, and are not intended to limit the present invention.
[0020] figure 1 is a block diagram of a variable grounding control device according to an embodiment of the present invention. Such as figure 1 As shown, the device may include: a receiver 101, configured to receive an electromagnetic interference frequency coupled by an electronic control system; and a controller 102, connected to the receiver 101, configured to determine The grounding scheme of the shielding layer of the electric control system, and output a group of switching value control signals corresponding to the grounding scheme, to control a group of grounding switches 40 connected between the shielding layer 20 and the ground (such as figure 2 K1,...
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The invention discloses a variable grounding control device, a variable grounding system and a variable grounding method for a shielding layer of an electric control system, and an engineering machine. The device comprises a receiver and a controller, wherein the receiver is used for receiving electromagnetic interference frequency coupled by the electric control system; and the controller is connected with the receiver, and is used for determining a grounding scheme of the shielding layer according to the electromagnetic interference frequency and an interference frequency threshold value, and outputting a group of switching value control signals which corresponds to the grounding scheme so as to control a group of grounding switches connected between the shielding layer and the ground. According to the technical scheme, the switch-off of the grounding switches can be adjusted in real time according to the field electromagnetic interference condition, and a variable grounding way is realized, so that the defect of difficulty in meeting the requirement of high interference resistance in a complicated and variable environment by adopting a single grounding way is overcome, and the interference resistance of the electric control system is improved.
Description
technical field [0001] The invention relates to the field of construction machinery, in particular to a variable grounding control device, system, method and construction machinery for a shielding layer of an electric control system. Background technique [0002] In recent years, with the increasingly serious electromagnetic interference, there are more and more electromagnetic compatibility problems in various equipment. In order to improve the anti-electromagnetic interference ability of the electrical system, weak current signal cables are generally equipped with good shielding layers and grounding points. However, for the shielding layer with a fixed grounding point, its electromagnetic resonance point has been fixed, so the best shielding effect cannot be maintained under different electromagnetic interference frequency bands. [0003] In different interference frequency bands, different grounding methods can be used for the shielding layer to obtain different shieldin...
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IPC IPC(8): H05K9/00
Inventor 曾杨习可于晓颖兰征刘振兴
Owner ZOOMLION HEAVY IND CO LTD