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Dual-purpose instrument for double-arm bridge and potential difference meter

A technology of potentiometer and double-arm bridge, which is used in AC/DC potential difference measuring devices, instruments, and measuring electrical variables, etc., can solve the problems that potentiometers cannot directly measure resistance and double-arm bridges cannot measure voltage.

Active Publication Date: 2014-12-10
杭州戎密科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Both the potentiometer and the double-arm bridge use wire-wound resistance as the main component of the instrument. Some types of potentiometer measuring discs are almost the same as the comparison arm of the double-arm bridge, but the potentiometer cannot directly measure resistance, and the double-arm bridge Can't measure voltage

Method used

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  • Dual-purpose instrument for double-arm bridge and potential difference meter
  • Dual-purpose instrument for double-arm bridge and potential difference meter
  • Dual-purpose instrument for double-arm bridge and potential difference meter

Examples

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Embodiment Construction

[0010] exist figure 1 , when the 5-pole double-throw switch K 1 Throw to the left, five-pole double-throw switch K 1 When the normally closed contact on the left is connected to the left normally open contact, there is no external measured resistance "R" X ", the double-arm bridge and potentiometer dual-purpose instrument becomes figure 2 Such a potentiometer circuit. exist figure 2 Among them, the increased resistance of the measuring disc II is equal to the decreased resistance of the substituting disc II′, and the same is true for measuring the sliding wire reel III and the substituting sliding wire reel III’. figure 2 In the circuit, the total resistance between the positive and negative poles of the highly stable power supply B remains unchanged no matter how the second stepping disk and the third sliding wire disk are rotated; By adjusting the adjustable resistor R P Make the galvanometer G 2 Point to zero, and the working current of the potentiometer is accura...

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Abstract

A dual-purpose instrument for a double-arm bridge and a potential difference meter used for measuring direct-current small resistance and direct-current voltage is composed of two stepping plates and a slide wire plate. The dual-purpose instrument with dual purposes can be shifted between the potential difference meter and the double-arm bridge by switching of a switch.

Description

technical field [0001] The invention relates to an instrument for measuring voltage and small resistance. Background technique [0002] Both the potentiometer and the double-arm bridge use wire-wound resistance as the main component of the instrument. Some types of potentiometer measuring discs are almost the same as the comparison arm of the double-arm bridge, but the potentiometer cannot directly measure resistance, and the double-arm bridge Cannot measure voltage. Contents of the invention [0003] The purpose of the present invention is to design a dual-purpose instrument for a double-arm electric bridge and a potentiometer, and use the measuring disc of the potentiometer as the comparison arm of the double-arm electric bridge to realize a dual-purpose device. [0004] The technical scheme of the present invention is taken in this way: the working power supply of the potentiometer adopts an external YJ49 type high-stable power supply B, and the high-stable power suppl...

Claims

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Application Information

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IPC IPC(8): G01R17/00G01R17/20
Inventor 骆君
Owner 杭州戎密科技有限公司
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