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

Three range transforming portable potentiometer

A potentiometer and range conversion technology, which is applied to AC/DC potential difference measuring devices and other directions, and can solve problems such as variation and thermoelectric potential influence

Inactive Publication Date: 2008-03-19
骆乃光
View PDF4 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] In the current portable potentiometer, due to the switch contact resistance and variation inside the potentiometer used to measure the two terminals, as well as the influence of thermoelectric potential, the resolution of the product cannot be 0.1μV.

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
  • Three range transforming portable potentiometer

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0010] In the figure, when the three measuring discs throw "0", the resistance of the left part between the I' replacement disc brush and the I measuring disc brush is 20×20 / 11Ω+12.8Ω+2.2Ω+40 / 11Ω=55Ω, the resistance value of the right part is 20×20 / 11Ω+2.2Ω+40 / 11Ω+507.8Ω=550Ω, so the total resistance between the two brushes of the first plate is 50Ω, because the measuring plate adds a resistance value The same resistance value is reduced by changing the disc in the era, so the resistance value remains unchanged when the measuring disc throws other values. In the ×10 range, the resistance in parallel with the measuring disc is 500Ω. At this time, the total current flowing through the measuring disc is 5.5mA, and the current on the parallel 500Ω resistor is 0.55mA. In the ×1 range, the resistance in parallel with the measuring disc is 50Ω. The resistance connected in series with the measuring disk is 500Ω, so the total current flowing through the measuring disk is 0.55mA. Simil...

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

No PUM Login to View More

Abstract

The invention provides a portable potentiometer with three-range switching for DC voltage measurement, which includes three ranges of X10, X1 and X0.1, wherein 20X20 / 11 Omega is used as a No:1 measuring disc, 10X0.2 Omega is used as a No:2 measuring disc, 0-2.2 Omega is used as a No:3 measuring disc, the three measuring discs are connected with wires, thus no contact resistance and variation exist, the zero potential produced by the lead wire resistance is compensated through the negative potential, in the X10 range, its high measuring limit is 211mv, in the X0.1 range, its minimum resolution is 0.1uV, and good measurement reproducibility can be achieved.

Description

technical field [0001] The invention relates to an instrument for measuring DC voltage. Background technique [0002] In the current portable potentiometer, due to the switch contact resistance and variation inside the potentiometer used to measure the two terminals, as well as the influence of thermal potential, the resolution of the product cannot be 0.1μV. Contents of the invention [0003] The purpose of the present invention is to design a portable potentiometer, which has three ranges and has a resolution of 0.1 μV when the limit is the smallest. It can eliminate the influence of contact resistance and variation between switches, and also exclude the influence of thermoelectric potential. [0004] The technical scheme of the present invention is as follows: the 10×4Ω adjustable resistor RP that adjusts the size of the working current 1 , an adjustable resistance RP with an adjustment range between 0 and 5Ω 2 , a 17Ω fixed resistor R for fixed supply voltage drop 0...

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