基于PLC的军械仓库温度闭环控制系统设计

The design of control system of ordnance warehouse temperature closed loop based on PLC

军械仓库的温度要求保持在一定范围内以保证武器的质量,本文设计了以PLC为核心的温度闭环控制系统,对以继电器为核心的系统进行了改进。设计了温度控制系统的硬件和软件程序:以PLC为控制核心,由EM231模拟输入热电偶模块、EM232模拟输出模块、可控硅调压器等硬件组成;控制程序采用PID算法,通过硅调压器控制电炉电阻丝上的电压实现温度控制;控制系统的操作方式可以采用触摸屏技术,操作界面简单、直观。本系统简单实用,可靠性高,功耗低、使用维护方便,控制精度较高,具有良好的应用前景。

The ordnance warehouse temperature is kept in a certain range to ensure the quality of weapons.This paper mainly dis-cusses the design of temperature closed-loop control system with PLC for the core, and also improved the relays-based system. The program of hardware and software of this temperature control system are designed:A system composed PLC as the core, EM231 thermocouple analog input module, EM232 analog output module, Semiconductor Controlled Rectifier(SCR)and so on. PLC control system using PID control algorithm controls the voltage on the resistor by SCR to control the temperature of temperature box. The operation mode of the control system adopts the touch screen technology, the operation interface is simple and intuitive. The system design is simple, practical, high reliability, low power consumption, and convenient usage and maintenance, which has a good appli-cation prospect.