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Three-range DC potentiometer adopting slide wire disc

A technology of DC potentiometer and sliding wire reel, which is applied in the direction of AC/DC potential difference measuring devices, etc., which can solve the problems of out-of-tolerance measurement data, complicated and troublesome structures of switches and instruments, etc.

Inactive Publication Date: 2011-08-24
骆晓英
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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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  • Three-range DC potentiometer adopting slide wire disc
  • Three-range DC potentiometer adopting slide wire disc

Examples

Experimental program
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Embodiment Construction

[0009] exist figure 1 Among them, when the three stepping disks and one double-sliding wire disk are all set to "0", the left resistance between the two brushes of the first stepping disk is equal to 2121Ω, and the resistance on the right is equal to 21210Ω, so the two brushes of the first stepping disk are equal to 2121Ω. 10 / 11 of the total current between the brushes flows on the left and 1 / 11 on the right. 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.

[0010] When the electromotive force of No. 1 battery for working power is below 1.4V, the current is not stable enough. The electromotive force of a new battery reaches 1.65V. Three groups of No. 1 dry batteries in series c...

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Abstract

The invention relates to a multirange voltage measuring instrument for DC voltage measurement, comprising three stepping disks and a double-slide wire disk, wherein each disk forms a measuring disk and a replacing disk by resistors with same resistance values; and the three replacing disks is directly connected with one measuring slide wire disk through leads without switch switching. The voltagemeasuring instrument is not influenced by variations and thermoelectrical potentials when in use, obtains multiple range conversions by changing the size of working current and has the minimum resolution of 0.1 microvolt.

Description

technical field [0001] The invention relates to an instrument for measuring DC voltage. Background technique [0002] Application Nos. 200510062264.3 and 200510062271.0 have announced a DC potentiometer with three stepping discs and a sliding wire disc. Its second and third stepping discs are composed of measuring discs, substituting discs and auxiliary discs. The resistance value on the replacement disk is the same, and every time a resistance is added to the measuring disk, the replacement disk will reduce the same resistance. Since the second stepping disk is not set at the 0th contact, the third stepping disk is set to a different indication value. The total resistance is variable. When the second stepping disc is set at the 0th contact, the third stepping disc is set with different indication values ​​and the total resistance of the circuit remains unchanged. For this reason, the second stepping disc has a measuring disc and a replacement disc. , an auxiliary disk is a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01R17/20
Inventor 骆晓英
Owner 骆晓英