Method for trimming resistor body for absolute position high-precision angular displacement potentiometer

CN119626696APending Publication Date: 2025-03-14CHENGDU HONGMING ELECTRONICS CO LTD
View PDF 0 Cites 0 Cited by

Patent Information

Application Number
CN202411689614.5
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2024-11-25
Publication Date
2025-03-14

AI Technical Summary

Technical Problem

It is difficult to achieve high-precision absolute position linear control during the production process of existing conductive plastic resistors, resulting in low absolute position accuracy of the angular displacement potentiometer. Especially in high-precision applications, the product pass rate is low and the production cost is high, which affects the development of the industry.

Method used

The sub-region editing method is used to linearly edit the effective working belt area of ​​the conductive plastic resistor body, and non-linear editing the invalid working belt area. By calculating the theoretical total resistance value and eliminating the contact resistance between the brush and the working belt, the absolute position linear accuracy is improved.

Benefits of technology

Through the sub-region editing method, the absolute position control linear accuracy of the conductive plastic resistor body is significantly improved, reaching about 0.05%, improving the product pass rate to 90%, reducing production costs, ensuring normal product delivery, and promoting industry development.

✦ Generated by Eureka AI based on patent content.

Smart Images

  • Figure CN119626696A_ABST
    Figure CN119626696A_ABST
Patent Text Reader

Abstract

The invention discloses a trimming method of a resistor body for an absolute position high-precision angular displacement potentiometer, and belongs to the technical field of production of angular displacement potentiometers based on conductive plastic resistor bodies. The position close to the C end is the position B, and the area between the A and the B is the effective working tape area. The trimming method comprises the following steps: carrying out linear trimming on the area between the A and the B on the working tape; and trimming an area between the B and the C on the working tape, specifically, calculating an actual resistance value between the B position and the A end, calculating a theoretical total resistance value, testing an actual resistance value between the A end and the C end, and carrying out nonlinear trimming on the area between the B and the C based on a difference value between the actual resistance value and the theoretical total resistance value. According to the invention, the effective working tape area and the invalid working tape area are trimmed respectively, so that the absolute position control linearity precision of the resistor body is greatly improved.
Need to check novelty before this filing date? Find Prior Art