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

Inverter DC spot welding dynamic resistance real-time measurement device and measurement method

A technology of inverting DC and dynamic resistance, applied in measuring devices, measuring electrical variables, measuring resistance/reactance/impedance, etc., can solve the problems of incompatibility between the accuracy and implementation of the dynamic resistance measurement technology of inverter DC spot welding, etc. Achieve the effect of improving installation implementation, improving real-time, accurate and fast measurement

Active Publication Date: 2018-03-13
HARBIN INST OF TECH
View PDF3 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The present invention aims to solve the problem that the accuracy and implementability of the existing inverter DC spot welding dynamic resistance measurement technology are not compatible, and the invention provides a real-time measurement device and measurement method for the inverter DC spot welding dynamic resistance

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
  • Inverter DC spot welding dynamic resistance real-time measurement device and measurement method
  • Inverter DC spot welding dynamic resistance real-time measurement device and measurement method
  • Inverter DC spot welding dynamic resistance real-time measurement device and measurement method

Examples

Experimental program
Comparison scheme
Effect test

specific Embodiment approach 1

[0024] Specific implementation mode one: see figure 1 Describe the present embodiment, the real-time measuring device of the dynamic resistance of the inverter direct current spot welding described in the present embodiment, it comprises Rogowski coil 1, integral reduction circuit 2, differential amplifier circuit 3, secondary voltage synchronous circuit 4 and embedded microprocessor 5 ;

[0025] The Rogowski coil 1 is set on the secondary circuit 8 of the inverter DC spot welding machine, and the two signal output terminals of the Rogowski coil 1 are respectively connected to the two signal input terminals of the integral restoration circuit 2, and the voltage signal of the integral restoration circuit 2 The output terminal is connected to the first analog signal input terminal of the embedded microprocessor 5,

[0026] The two voltage signal input terminals of the differential amplifier circuit 3 are respectively connected to the two ends of the secondary tap of the transfo...

specific Embodiment approach 2

[0029] Specific implementation mode two: see figure 1 Describe this embodiment, the difference between this embodiment and the inverter DC spot welding dynamic resistance real-time measuring device described in the first embodiment is that it also includes a communication interface circuit 6, the data signal input terminal of the communication interface circuit 6 and the embedded micro The first data signal output end of the processor 5 is connected.

[0030] In this embodiment, the communication interface circuit 6 is used for data interaction between the device described in the present invention and other devices.

specific Embodiment approach 3

[0031] Specific implementation mode three: see figure 1 Describe this embodiment, the difference between this embodiment and the inverter DC spot welding dynamic resistance real-time measuring device described in the first embodiment is that it also includes a data storage circuit 7, the data signal input terminal of the data storage circuit 7 and the embedded micro The second data signal output end of the processor 5 is connected.

[0032] In this embodiment, the data storage circuit 7 is used for local recording of measurement data such as current and voltage.

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 discloses an inverter direct current spot welding dynamic resistance real-time measuring device and a measuring method, belonging to the technical field of electronic circuits and measuring. The problem of incompatibility between accuracy and implementability of existing inverter DC spot welding dynamic resistance measurement technology is solved. In the device of the present invention, the Rogowski coil is set on the secondary circuit of the inverter DC spot welding machine, the two signal output terminals of the Rogowski coil are respectively connected to the two signal input terminals of the integral restoration circuit, and the voltage signal output end of the integral restoration circuit is connected to the embedded micro The first analog signal input terminal of the processor, the two voltage signal input terminals of the differential amplifier circuit are respectively connected to the two ends of the secondary tap of the transformer of the inverter DC spot welding machine, and the voltage signal output terminal of the differential amplifier circuit is connected to the first embedded microprocessor at the same time 2. The analog signal input terminal and the voltage signal input terminal of the secondary voltage synchronous circuit, the voltage signal output terminal of the secondary voltage synchronous circuit is connected to the timing signal input terminal of the embedded microprocessor. It is used for real-time measurement of dynamic resistance during spot welding.

Description

technical field [0001] The invention belongs to the technical field of electronic circuit and measurement. Background technique [0002] Resistance spot welding is a welding method widely used in the manufacture of automobile bodies. There are about 4000-6000 welding points on the body of a car, accounting for 95% of the total welding. The quality of the welding directly affects the use of the whole vehicle. life. Due to the particularity of the spot welding of the automobile body, it is difficult to remedy after welding, and the conventional post-weld sampling inspection can no longer meet the user's requirements for the quality of the body. Therefore, there is an urgent need to find a reliable monitoring method for on-line monitoring of the spot welding quality of the car body at the production site to understand the production quality of the product. [0003] Dynamic resistance is a commonly used quality monitoring signal for resistance spot welding. The resistance of ...

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): G01R27/08
Inventor 夏裕俊夏振新张忠典张忠泽朱世良张芮
Owner HARBIN INST OF TECH
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