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Potentiometer

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 problems such as troublesome, complicated switch and instrument structure, and increased instrument volume.

Inactive Publication Date: 2011-09-07
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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  • Potentiometer
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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 resistance value on the left side between the two brushes of the first stepping disk is equal to 2121Ω, and the resistance value on the right side is equal to 21210Ω. Therefore, the first stepping disk 10 / 11 of the total current between the two brushes flows to the left and 1 / 11 to the right. When three stepping discs and a double-sliding wire disc are used to set other contacts, the resistance added by the measuring disc in each stepping disc is equal to the resistance decreased by the replacement disc, so the left and right between the two brushes of the first stepping disc The resistor value on the right remains unchanged.

[0010] The standard operating current of the DC potentiometer is 1.1mA. The left current between the two brushes of the first step plate is 1mA, and the right current is 0.1mA. A branch, all the way through the second II' replacemen...

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Abstract

The invention discloses a potentiometer used for measuring direct current voltage, which is provided with three stepping disks and a dual-sliding line disk; each disk forms a measuring disk and a replacing disk by resistors with the same resistance; the three measuring disks and sliding lines of one measuring disk are connected directly by conducting wires without switching by using a switch; andthe potentiometer does not have variation and thermoelectric potential effects during measurement.

Description

technical field [0001] The invention relates to an instrument for measuring DC voltage. Background technique [0002] Application No. 200510062356.9 discloses a DC 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 disk is the same, every time a resistance is added to the measuring disk, the replacement disk will reduce the same resistance, because the second stepping disk is not set at the 0th contact, and the circuit is total when the third stepping disk is set to a different value. The resistance changes. When the second stepping disc is set at the 0th contact, the total resistance of the third stepping disc with different indication values ​​remains unchanged. Therefore, the second stepping disc has a measuring disc and a replacement disc. An auxiliary board is added to distinguish the circuit connection o...

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