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On-line detection method of cable disconnection

A detection method and technology for cable disconnection, which are applied in the direction of measuring electricity, measuring devices, measuring electrical variables, etc., can solve the problems that cables cannot be accurately and timely detect circuit disconnection, so as to ensure reliability and timeliness, and prevent major accidents. , the effect of protecting systems and equipment

Active Publication Date: 2017-06-16
青岛鸿瑞电力工程咨询有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] In order to solve the practical problem that existing cables cannot accurately and timely detect disconnection in the circuit, the present invention proposes a cable disconnection online detection circuit and method, and the specific technical scheme is as follows:

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  • On-line detection method of cable disconnection
  • On-line detection method of cable disconnection

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Embodiment Construction

[0022] The cable disconnection online detection circuit and method of the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments of the present invention.

[0023] figure 1 It is the circuit diagram of the switching signal transmission cable in the prior art, figure 2 It is a schematic diagram of the cable disconnection online detection circuit of the present invention, from figure 1 and figure 2 It can be seen from the comparison that the present invention adds a cable and a resistor on the basis of the original two-wire system signal cable to realize the function of judging cable disconnection by using a three-wire system with an external resistor.

[0024] The cable disconnection online detection circuit of the present invention includes a pressure switch 6, the pressure switch 6 is provided with a normally open contact NO5 and a normally closed contact NC4, the normally open contact NO5 is connected to ...

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Abstract

The invention provides a circuit and method for detecting disconnection of a cable online. The circuit comprises a pressure switch. The pressure switch is provided with a normally open contact NO and a normally closed contact NC. The normally open contact NO is connected with a control system through a line 1. The normally closed contact NC is connected with the control system through a line 2. The circuit is characterized in that another detection line 3 is arranged between the normally open contact NO and the control system, and a protection resistor is connected between the normally open contact NO and the normally closed contact NC. The control system can detect the disconnection situation of switching value input signal cables in time by detecting the signal states between the line 1 and the line 2, between the line1 and the line 3 and between the line 2 and the line 3, the reliability and the timeliness of switching value input signals are guaranteed, the system and the equipment can be protected effectively and major accidents can be prevented.

Description

technical field [0001] The invention relates to the technical field of cable disconnection detection, in particular to an online detection method for cable disconnection. Background technique [0002] Today, with a high degree of industrial automation, people have higher and higher requirements for the safety of equipment and system operation, which puts forward higher requirements for the reliability and real-time performance of signals; in order to ensure the reliability and real-time performance of signals, we first An effective method is needed to monitor the integrity of the cable online and in real time through the control system. Once the cable breaks, we can find it in time. [0003] Especially for switch signal cables with normally open contacts NO and normally closed contacts NC, currently, each switch input signal cable is generally used to transmit signals with a two-wire cable. Under normal circumstances, for switch signal local equipment There are two kinds of...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01R31/02
Inventor 张国政王力王彬胡培荣李海宁张成成杨忠强
Owner 青岛鸿瑞电力工程咨询有限公司