This blog mainly introduces and records the programming and scheme design related to air tightness detection. For the application of the electric proportional valve used in the system in the tension control of winding and unwinding, please refer to the following article link:
Tension measurement + calibration (ST code)_RXXW_Dor's blog-CSDN blog The dancing wheel corresponds to the tension adjustment range, which we can change indirectly by changing the air pressure of the cylinder. For the detailed application of the tension dancing wheel in the closed-loop control of winding and unwinding, please refer to the following Article link, here we mainly discuss the analog programming of precision adjustable valves. PLC tension control (open-loop closed-loop algorithm analysis)_plc tension control program_RXXW_Dor's blog-CSDN blog. https://rxxw-control.blog.csdn.net/article/details/128721059 The system control process requirements are as follows. The system must first control the pressure in the gas storage tank, and the tank needs to reach the working target pressure. After the target pressure is reached, the electric proportional valve is closed, and the pressure holding time delay is opened. During the pressure holding process, it is necessary to monitor the change of the real-time pressure value. If the pressure change is less than the threshold, we think there is no problem with the airtightness.
1. Control process requirements
