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高精度恒温水浴控制系统的设计

发表时间:2022/8/15 23:33:20  来源:JIT  作者:WM  浏览次数:163  
字体大小: 【小】 【中】 【大】

摘要:水浴温度的精确控制是实现温度测量仪器正常工作的关键技术。本系统针对南京市金陵科技学院图书馆的干挂石材幕墙的热工性能测试中的温度测量中使用的PT100热电阻的温度检测校准要求,基于PID控制理论,以三菱公司的PLC FX3U-32MT为控制器,使用触摸屏、电机搅拌电路、加热电路、供水电路实现水浴的智能高精度恒温控制。并在人机界面设计上,设置了三级密码权限管理,保证了系统的安全可靠性。实验测试结果表明系统的控制精度高,过调量小,工作稳定可靠。

关键词:水浴;恒温;PID;PLC;监控

A Design on High-precision Constant Temperature Control System of Water-bath

Abstract: The accurate control of water-bath temperature is the key technology to realizing the normal work of temperature measuring instruments. This system aims at the calibration requirement for temperature measurement of PT100 thermal resistance used in temperature measurement of dry-hanging stone curtain wall in the library of Jinling Institute of Technology Library, Nanjing. It uses PLC FX3U-32MT of Mitsubishi as the controller based on PID control theory, and that uses touch screen, motor stirring circuit, heating circuit and water supply circuit to realize intelligent high-precision constant temperature control of water-bath. This system sets three-level password authority management in the human-machine interface to ensure the safety and reliability. The experimental results show that the system has high control accuracy, small overshoot, and stable and reliable operation.

Key words: water-bath; constant temperature; PID; PLC; monitor

(W译,G校)



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