Research And Design Of High-speed Punch Monitoring System Based On Eddy-current Sensor

Industrial production is gradually upgrading to semi-automation,full automation,and digital transformation,and the combination of Internet of Things technology and sensor technology is a hot spot in the research of industrial manufacturing industry now and even in the future.In industrial production,in order to improve the production efficiency and production quality of high-speed punching equipment,it is necessary to use precision measurement sensors instead of manual measurement of the deformation of the processed devices to meet the production needs of precision devices.Among the traditional precision measurement sensors,eddy-current sensors are the most widely used in industrial scenarios,but eddy-current sensors cannot meet the production needs of small precision devices due to factors such as temperature drift characteristics,low frequency stability,and large frequency measurement errors.Based on the research status,application scenario analysis and design demand analysis of eddy-current sensor technology at home and abroad,this paper studies and designs an eddy-current sensor monitoring system with low temperature drift characteristics,high frequency stability,low frequency measurement error,and suitable for high-speed punching machine application scenarios.The main content and work of this article are as follows:(1)Through the analysis of the working process of high-speed punching machine and the working principle of eddy-current sensor,the feasibility of system design requirements is summarized,and the system design scheme is determined from the perspective of system function realization.(2)For easy operation,the whole system is divided into a bottom function board and a control panel.Each function board has a main control chip,and the main control chip bit STM32.The bottom functional board mainly realizes the eddy-current signal conversion function,in which the eddy-current signal conversion circuit adopts a frequency-modulated circuit,and the system oscillation circuit adopts a kara oscillation circuit,so as to realize the design requirements of high frequency stability.(3)Based on Keil’s software development environment,combined with the top function board and the bottom operation panel,the synchronous adaptive sliding average algorithm is used to process the eddy-current signal and measurement error,and realize the monitoring function and frequency measurement function of the system for the high-speed punching machine.Through physical testing,the algorithm can realize the design requirements of low temperature drift and low frequency measurement error,and the measurement accuracy can reach 10 um.(4)Use Vivado software to analyze the frequency measurement error of traditional frequency measurement technology,and the host computer software uses C# language to design.Therefore,a higher sensitivity is designed,and an eddy-current sensor monitoring system that can monitor,count and alarm high-speed punches is designed.