Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Two-measuring-range potential difference meter with four metering panels

A potentiometer and measuring disc technology, which is applied in the direction of AC/DC potential difference measuring devices, etc., can solve problems such as difficult handling, small resistance, and increased instrument volume, so as to improve measurement accuracy, facilitate instrument manufacturing, and The effect of simple structure

Inactive Publication Date: 2010-07-07
FUYANG PRECISE INSTR CO
View PDF2 Cites 14 Cited by
  • 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 better than ZL200510062375.1, but the current of the two potentiometers flows through the brush of the first stepping disc, and then divides into two paths, passes through each stepping disc, and converges at the first stepping disc. The measuring disc brush of the disc; the problem it brings is that the resistance values ​​of the second, third and fourth discs are composed of two identical numbers, and the resistance value is small, and there is no standard resistance to compare; if the transition standard resistance is used , then the lead error between the two transition standard resistors is difficult to handle; therefore, the resistance values ​​of the second, third and fourth discs of the potentiometer are difficult to make accurate

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Two-measuring-range potential difference meter with four metering panels
  • Two-measuring-range potential difference meter with four metering panels
  • Two-measuring-range potential difference meter with four metering panels

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] Example 1, in figure 1 In the ×1 range, when the four stepping discs are all set to "0", the resistance value on the left between nodes A and B is equal to 300Ω, and the resistance value on the right is equal to 30000Ω. The standard working current of the potentiometer is at nodes C, A, and B The current between nodes A and B is designed to be 11.11mA. Therefore, the current between nodes A and B on the left is 11mA, and the current between nodes A and B on the right is 0.11mA. It is equal to the reduced resistance of the replacement disc, so the left and right resistance values ​​between nodes A and B remain unchanged, and flow through the resistance R 1 , R 2 , R 3 , R 4 current is also unchanged.

[0034] The current on the left side between nodes A and B flows to the contact with the brush of the second replacement plate, and then divides into two branches, all the way through the first step plate and flows to the contact with the brush of the second measuring p...

Embodiment 2

[0044] Example 2, in figure 2 , when the four stepping disks are all set to "0", the resistance value on the left between nodes A and B is equal to (1900+100) / 2Ω+100Ω=1100Ω, and the resistance value on the right between nodes A and B is equal to 10450Ω+100Ω +(100+10) / 2Ω+395Ω=11000Ω, therefore, 10 / 11 of the total current between nodes A and B flows to the left and 1 / 11 flows to the right. When each step disc is placed with other contacts, the resistance added by the measuring disc in each step disc is equal to the resistance decreased by the replacement disc, so the resistance values ​​on the left and right between nodes A and B remain unchanged.

[0045] In the ×1 range, the total resistance between nodes A and B is 1000Ω, and the resistance between nodes A and B is 10 times its own resistance value r 1 and resistance r 2 The resistors in series are connected in parallel, so the current flowing between nodes A and B is 10 / 11 of the total current of the potentiometer, and th...

Embodiment 3

[0055] Example 3, in image 3 Among them, the four stepping disks are composed of measuring disks and replacement disks with the same quantity and resistance value. The measuring disk in each stepping disk increases the resistance, and the replacement disk reduces the resistance of the same resistance value, and vice versa. Therefore, Regardless of the indication value of the stepper panel, the resistance values ​​on the left and right sides between nodes A and B remain unchanged.

[0056] The current is divided into two paths between the contact contacted by the brush of the replacement plate III’ and the contact contacted by the brush of the measuring plate III, and one path passes through the resistance R 3 , the other path passes through the fourth stepping plate, the resistance of the two paths is 110Ω, and the above current is also the same, the resistance value between the contact contacted by the brush of the replacement plate III’ and the contact contacted by the brus...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
Resistanceaaaaaaaaaa
Resistanceaaaaaaaaaa
Login to View More

Abstract

The invention relates to a two-measuring-range potential difference meter with four metering panels, which is used for measuring direct-current voltage; four metering panels are directly connected by lead wires without a switch for switching, therefore, no contact resistance variation effect of the switch exists when the potential difference meter is used for measuring; the resistance value of the metering panel of each step panel and a substitution panel is 10 integer power, and the resistance can be compared with standard resistance by an electrical bridge, so as to improve the resistance manufacturing precision and improve the measuring accuracy of the whole potential difference meter.

Description

technical field [0001] The invention relates to an instrument for measuring DC voltage. Background technique [0002] Invention patent ZL200510062375.1 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

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): G01R17/20
Inventor 骆君程军方宁妹
Owner FUYANG PRECISE INSTR CO
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com