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Relay multiplexer switch circuit with priority and test system

A multi-way selector switch and switching circuit technology, applied in circuit breaker testing, instruments, measuring electricity and other directions, can solve the problems of inaccurate test results, ensure stability and accuracy of test results, and improve test accuracy , the effect of protecting safety

Active Publication Date: 2019-01-15
BEIJING MECHANICAL EQUIP INST
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

[0005] In view of the above analysis, the present invention aims to provide a relay multi-way selector switch circuit and test system with priority to solve the problem of inaccurate test results caused by the influence between relays in existing switch circuits

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  • Relay multiplexer switch circuit with priority and test system
  • Relay multiplexer switch circuit with priority and test system
  • Relay multiplexer switch circuit with priority and test system

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Embodiment Construction

[0043] Preferred embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings, wherein the accompanying drawings constitute a part of the application and together with the embodiments of the present invention are used to explain the principle of the present invention and are not intended to limit the scope of the present invention.

[0044] In a first embodiment of the present invention, a relay multiplexing switch circuit with priority is disclosed, said circuit comprising n relays,

[0045] Among them, the mth measured signal is connected to the normally open contact of the mth relay; the middle contact of the mth relay is connected to the normally closed contact of the m+1th relay, wherein, 1≤m<n, And m is an integer;

[0046] The nth measured signal is connected to the normally open contact of the nth relay;

[0047] The normally closed contact of the first relay is suspended;

[0048] The middle contact of the nth ...

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Abstract

The invention relates to a relay multiplexer switch circuit with priority and a test system, and belongs to the technical field of the automatic test. The problem that a test result of the existing switch circuit is inaccurate due to influence between relays is solved. The relay multiplexer switch circuit with the priority comprises n relays, the m-th tested signal is connected with a normally-open contact of the m-th relay, an intermediate contact of the m-th relay is connected with a normally-close contact of the m+1-th relay, wherein m is not less than 1 and less than n, and m is integer; the n-th tested signal is connected with the normally-open contact of the n-th relay, and the normally-close contact of the first relay is overhead; the intermediate contact of the n-th relay is connected with a test instrument. The switch circuit designed by the invention guarantees the priority order of selecting the tested signal from the hardware, and only the tested signal with the highest priority can be selected under the condition that multiple relays are absorbed, and the isolation between the tested signals is realized.

Description

technical field [0001] The invention relates to the technical field of automatic testing, in particular to a relay multi-channel selection switch circuit with priority and a testing system. Background technique [0002] In the field of automated testing, multi-channel selector switches are widely used to measure multiple signals under test, which can greatly reduce design costs and save system resources. When the signal to be tested is a differential signal, if a general multi-channel selection switch is used to forcibly share the ground of multiple channels of the measured signal, it will not only cause interference between the signals, increase the measurement error, but also affect the normal operation of the measured object. Features. In this case, the multi-channel selection switch circuit composed of relays has a good application scenario, which can realize the isolation between multiple signals under test. [0003] At present, the multi-channel selector switch compo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G05B19/04G01R31/327
CPCG01R31/3278G05B19/04
Inventor 杨挺
Owner BEIJING MECHANICAL EQUIP INST
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