On-line Detection And Monitoring System For Continuity Of Enameled Wire Coat

It is a trend to use the on-line flaw detection system as a quality control method for enameled wire production. But this field is barren and hardly researched currently in our country. This paper is devoted to solve this problem. Firstly, this paper introduces the importance of the on-line flaw detection system for enameled wire production, and studies researches in this field all over the world. Secondly, this paper presents a scheme for the on-line flaw detection system based on analyzing and studying the shortcomings of existing examining devices and other on-line detection systems. This paper addresses the novel on-line flaw detection method for continuous and non-contact detection adopted in this detection system, which completes flaw detection by measuring the leakage current when forcing the enameled wires to pass through a high-voltage DC electric field. This paper also studies and designs the sensor for the detection system. The principle of the sensor is analyzed theoretically for the first time, which is one of creation works in this paper. Then, this paper studies the shape of the sensor, gives the relation among the sensor radius, the examining high-voltage and the enameled wire diameter, designs a high-voltage DC regulator and leakage detection circuit. Detailed descriptions and schematics regards those issues are given in paper. Furthermore, Field Bus technology is applied in system to solve the supervisory problem. The paper designs the hardware and software of monitoring node in field based on LonWorks, discusses some issues about communications between the host computers in central supervisor unit and node in field. Lastly, this paper analyzes possible interferences existing in system and presents some solutions.This paper researches the non-contact flaw detection method for enameled wire, and applies it to control the quality of continuous enameled wire production. A sample device is made during the research process and the experiment effect is satisfied. This research advances the on-line detection technology, and expedites the enameled wire industry.