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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

Inactive Publication Date: 2009-02-04
程军
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Since the second and third stepping discs have auxiliary discs, the number of layers of the second and third stepping disc switches is increased, thereby increasing the volume of the instrument and complicating the structure of the switch and the instrument. If the measurement data of the second and third stepping discs are found to be out of tolerance during the verification process, it is very troublesome to correct the inner layer resistance of the second and third stepping disc switches

Method used

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  • Potential difference meter using sliding disk
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  • Potential difference meter using sliding disk

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Example 1, in Figure 1, when the three stepping disks and one double sliding wire disk are all set to "0", the resistance value on the left side between the two brushes of the first stepping disk is equal to 243.21Ω, and the resistance value on the right side is equal to 2432.1 Ω, therefore, 10 / 11 of the total current between the two brushes of the first step disc flows on the left, and 1 / 11 flows on the right. When each stepping disk is placed with other contacts, the resistance added by the measuring disk in each stepping disk is equal to the resistance reduced by the replacement disk, so the resistance value between the left and right sides of the two brushes of the first stepping disk remains unchanged.

[0027] The standard operating current of the potentiometer is 1mA, the left current between the two brushes of the first step plate is 10 / 11mA, the right current is 1 / 11mA, and the left current flows to the contact with the brush of the second replacement plate and ...

Embodiment 2

[0036] Embodiment 2, in Fig. 2, when the three stepping disks and one double sliding wire disk are all set to "0", the resistance on the left side between the two brushes of the first stepping disk is equal to 233.31Ω, and the resistance on the right side is equal to 2333.1Ω, The total resistance between the two brushes of the first stepping disk is 212.1Ω, so 10 / 11 of the total current between the two brushes of the first stepping disk flows on the left side, and 1 / 11 flows on the right side. When three stepping discs and one double-sliding wire disc are set to other indication values, the increased resistance of the measuring disc is equal to the reduced resistance of the replacement disc, so no matter what indication value is set on the three stepping discs and one double-sliding wire disc, the circuit The total resistance remains unchanged.

[0037] The standard operating current of the potentiometer is 1mA, the left current between the two brushes of the first step plate ...

Embodiment 3

[0046] Embodiment 3, in Fig. 3, when the three stepping disks and one double sliding wire disk are all set to "0", the resistance on the left side between the two brushes of the first stepping disk is equal to 243.21Ω, and the resistance on the right side is equal to 2432.1Ω, The total resistance between the two brushes of the first stepping disk is 221.1Ω, so 10 / 11 of the total current between the two brushes of the first stepping disk flows on the left side, and 1 / 11 flows on the right side. When the three stepping discs and one double-sliding disc are set to other indication values, the increased resistance of the measuring disc is equal to the reduced resistance of the replacement disc, so no matter what indication value is set on the three stepping discs and one double-sliding disc, the circuit The total resistance remains unchanged.

[0047] In the ×0.1 range, the total resistance between the two brushes of the first step disc is 221.1Ω, plus the 48.9Ω resistance R 4 , ...

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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.

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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Application Information

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IPC IPC(8): G01R17/20G01R19/00
Inventor 洪卓儿高桂本程军骆晓英
Owner 程军
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