Potentiometer with four step plates

A technology of potentiometer and step disc, which is applied in the direction of AC/DC potential difference measuring devices, etc., which can solve the problems of increasing the size of the instrument, difficult to handle, and difficult to make accurately.

Inactive Publication Date: 2010-07-14
骆洪亮
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003]Because the third and fourth step discs have auxiliary discs, the layers of switches of the third and fourth step discs are increased, thereby increasing the instrument’s The volume also complicates the structure of the switch and the instrument, especially if the measurement data of the third and fourth step discs are found to be out of tolerance during the instrument verification process, it is very important to correct the inner layer resistance of the third and fourth step disc switches. troublesome
The application number 200820120442.4 is more advanced than ZL200510062367.7, but the current of the two potentiometers flows through the bru

Method used

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  • Potentiometer with four step plates
  • Potentiometer with four step plates

Examples

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Embodiment 1

[0010] Example 1: In figure 1 Among them, the first stepping disc only has a measuring disc, and the other three stepping discs are composed of measuring discs and replacement discs with the same quantity and resistance value. The measuring disc in each stepping disc increases the resistance, and the replacement disc reduces the same resistance. The value of the resistance, and vice versa, so, no matter what indication value is set on the stepper panel, the resistance value on the right side between nodes A and B remains unchanged.

[0011] The current is divided into two paths between the contact contacted by the second II'substitution disc brush and the contact contact of the second measurement disc brush, and one path passes through the 2000Ω resistance R 2 , the other way passes through the first stepping disc, the resistance passing through the first stepping disc is: 1900Ω+100Ω=2000Ω, which is related to the resistance R 2 equal, when the resistor R 2 The current on th...

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Abstract

The invention relates to a potentiometer with four step plates for DV voltage measurement; resistors on the step plates are designed to have the resistance of the integral power of 10; standard resistors can be compared on a bridge, thereby facilitating instrument manufacturing, improving the manufacturing precision of the resistors on measuring plates and replacement plates, and improving the measurement accuracy of the complete potentiometer; the four measuring plates are directly connected by leads and are not switched by switches, so that no switch contact resistance difference impact exists when the potentiometer is used for measurement; because contacts and whole rings are made of the same material, heat thermo emf and variable heat thermo emf produced by the movement of a brush arethe same and in reverse directions; and therefore, the potentiometer can measure micro-voltage.

Description

technical field [0001] The invention relates to an instrument for measuring DC voltage. Background technique [0002] Invention patent ZL200510062367.7 was published on May 7, 2008. It is a potentiometer with four stepping discs. Its third and fourth stepping discs each have a measuring disc, a substituting disc and an auxiliary disc. Composition, the resistance value on the measuring disk and the replacement disk is the same, every time a resistance is added to the measuring disk, the replacement disk will reduce the same resistance, since the third step disk is not set at the 10th point, the fourth step disk is set The total resistance of the circuit changes when the indication value is different. When the third step dial is set at the 10th point, the total resistance of the circuit remains unchanged when the fourth step dial is set at different indication values. Therefore, the third step dial has a measuring dial. 1. In addition to the replacement disk, an auxiliary dis...

Claims

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Application Information

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IPC IPC(8): G01R17/20
Inventor 骆洪亮
Owner 骆洪亮
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