Potential difference meter using sliding disk

A potentiometer and wire reel technology, applied to AC/DC potential difference measuring devices, measuring electrical variables, measuring current/voltage, etc., can solve the problem of increasing the volume of the instrument, measuring data out of tolerance, and complex structures of switches and instruments And other issues
CN101359002AInactive Publication Date: 2009-02-04程军
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
程军
Publication Date
2009-02-04
Estimated Expiration
Not applicable · inactive patent

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Abstract

The present invention relates to a potentiometer, which is used for measuring the DC voltage and adopts the slip-line disc. The potentiometer consists of three stepping discs and a double-slip-line disc; the four discs all consist of a measuring disc and a replacing disc, which have the same resistance value; the working current is divided into two branches of 10 to 1 between two electrical brushes of the first stepping disc; two branches of the same current are formed in the branch with two parallel discs; the electrical brushes of the other measuring discs except the first stepping disc are connected with the electrical disc of the replacing disc through resistances or wires; each stepping disc or the double-slip-line disc has no auxiliary disc; therefore, the volume of the device is reduced, the manufacturing cost of the device is reduced, simultaneously the four measuring discs are connected through wires, and the influence of the variation and the thermoemf is eliminated.
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Description

technical field

[0001] The invention relates to an instrument for measuring DC voltage. Background technique

[0002] Application Nos. 2005100623569, 2005100622674, 2005100622903, etc. disclose a potentiometer with three stepping discs and a double-sliding line disc. Its second and third stepping discs are each composed of a measuring disc, a substituting disc and an auxiliary disc. The resistance value on the disc and the replacement disc is the same, every time the measuring disc increases a resistance, the substituting disc will reduce the same resistance, when the second step disc is set to the 0th point, the second step disc and the third step The resistance of the parallel part of the disks is equal, and when the third step disk is set with different indication values, the resistance value of the circuit remains unchanged. When the second step disc is not set to "0", the third step disc is set to a different indication value, and the resistance value of the circuit ch...

Claims

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