Low-thermoelectric-potential wiring module for measuring direct-current small voltage

A low-voltage, low-heat technology, used in the measurement of electrical variables, components of electrical measuring instruments, measuring devices, etc., can solve the problems of affecting the measurement results, the large thermoelectric potential of the connecting terminals, etc., to reduce the temperature difference and improve the test efficiency. Effect

Pending Publication Date: 2020-08-14
BEIJING INST OF RADIO METROLOGY & MEASUREMENT
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

[0005] The purpose of the present invention is to provide a low thermoelectric potential wiring module with reasonable design for measuring DC small voltage, which solves the problem that the large thermal potential of the connecting terminal affects the measurement results in the precision DC small voltage measurement

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  • Low-thermoelectric-potential wiring module for measuring direct-current small voltage

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Embodiment Construction

[0018] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention, but not to limit the present invention.

[0019] refer to figure 1 , the present invention provides a low thermoelectric potential connection module for measuring small DC voltages, including a connection terminal 1 and a constant temperature block 3, the constant temperature block 3 is equipped with a terminal 2, and the terminal 2 passes through the constant temperature block 3 and is fixedly connected to the terminal 1 , the thermostatic block 3, the terminal 2 and the terminal 1 are all made of gold-plated copper material; an insulating heat-conducting gasket 4 is arranged between the thermostati...

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Abstract

The invention discloses a low-thermoelectric-potential wiring module for measuring a direct-current small voltage. The low-thermoelectric-potential wiring module comprises wiring terminals and a constant-temperature block, a binding post is installed on the constant-temperature block, the binding post penetrates through the constant-temperature block to be connected with the wiring terminals, andthe constant-temperature block, the binding post and the wiring terminals are all made of a gold-plated red copper material. The constant-temperature block, the binding post and the wiring terminals are all made of the gold-plated red copper material, so the temperature difference of connecting points caused by thermoelectric coefficients of different materials is reduced; and the constant temperature block is used for rapidly absorbing heat on the binding post and the wiring terminals, so that temperature balance is rapidly achieved, the temperature difference between the wiring terminals atthe two ends is reduced, the thermoelectric potential generated on a connecting terminal is effectively reduced to the nV magnitude, the thermoelectric potential can be stabilized after being connected for 30 seconds, and the test efficiency is improved.

Description

technical field [0001] The invention relates to a low thermal potential module, in particular to a low thermal potential connection module for measuring DC small voltage. Background technique [0002] In the magnitude transfer of quantum voltage, the influence of connection thermoelectric potential is a non-negligible introduction item in the uncertainty evaluation of measurement results. Usually, if there is no selection of the contact metal at the connection end, the thermoelectric potential may reach the microvolt level, which seriously affects the measurement uncertainty of the DC voltage, especially the small DC voltage below 10mV. [0003] According to the Seebeck effect formula EAB=SAB(T1-T2), where EAB is the thermoelectric potential when different materials are connected, the unit is V, SAB is the thermoelectric coefficient of different materials A and B, the unit is V / ℃, T1, T2 are the temperatures of the two joint points, in °C. It can be seen from the Seebeck e...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R1/04
CPCG01R1/0416
Inventor 朱珠康焱张力丹
Owner BEIJING INST OF RADIO METROLOGY & MEASUREMENT
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