Method for detecting hardwiring connection among different systems

A detection method and hard-wired technology, applied in the direction of measuring electricity, measuring devices, measuring electrical variables, etc., can solve the problems of complex circuit design, low reliability, and inadmissibility, and achieve simple structure, high reliability, and guaranteed availability. Effect

Inactive Publication Date: 2013-12-04
NUCLEAR POWER INSTITUTE OF CHINA
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Problems solved by technology

Using these methods has the disadvantages of complicated circuit design and low reliability, or the limitation of not allowing real action signals to be tested under certain conditions.

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  • Method for detecting hardwiring connection among different systems

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Embodiment Construction

[0008] The present invention will be described in further detail below in conjunction with the accompanying drawings and embodiments.

[0009] In order to detect hard-wired connections between different systems online, multiple hard-wired lines are used to transmit the signal to be detected, and each hard-wired line signal is detected. When a signal is detected, a logic "1" is output; When the signal logic number is 1, it is judged that the line transmitting the signal is normal; when the sum of the detected signal logic numbers is greater than or equal to 2, an action is triggered.

[0010] During the test, only one test signal is injected into one line at a time. Due to the logical design of the signal receiver, the test signal of one line will not trigger the real action; on the other hand, if there is a real action signal, the action signal can act On all hardwired circuits, logical trigger conditions are met to trigger actions. The test signal is fed back through the log...

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Abstract

The invention relates to a method for detecting hardwiring connection among different systems. The method comprises: detecting the signal of each hard wire line; when the detected signal number is 1, determining that the line for transmitting the signal is normal; and when the detected signal number is greater than or equal to 2, triggering an action. According to the invention, multiplexed output is arranged at a signal emitting side, and a logical and signal feedback circuit is arranged at a receiving side. The method provided by the invention has the advantages of simple structure, high reliability, unaffected system function execution, and ensured system availability.

Description

technical field [0001] The invention relates to a detection method for hard-wired connections between different systems, in particular to a detection method for hard-wired connections between different systems in the field of instrument control system design methods. Background technique [0002] At present, in order to detect the hard-wired connections between systems, some methods are by sending instantaneous short pulse test signals, and some are by sending real action signals, etc. The short pulse is used for the test, and the signal sending and receiving parties set up special pulse sending and receiving circuits and monitoring circuits, and ensure that the pulse width is narrow enough to avoid triggering of the downstream system. Using these methods has the disadvantages of complex circuit design and low reliability, or the limitation that it does not allow inspection by real action signals under certain conditions. Therefore, there is an urgent need to provide a nove...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R31/02
Inventor 周继翔许东芳李谢晋刘宏春
Owner NUCLEAR POWER INSTITUTE OF CHINA
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