基于生化仪温度控制的电流检测系统设计

Design of Current Detection System Based on Temperature Control of Biochemical Instrument

基于生化分析仪的温度控制,本文设计了一款高精度的电流检测系统。该设计主要包括电流检测系统的硬件电路、软件程序及温度控制算法。硬件内容包括温度及电流检测电路、制冷模块、CAN通信模块、显示模块。使用KEIL MDK软件开发电流检测系统的主控程序,温度控制算法采用增量式PID算法。通过多次测试验证相关参数,文中设计的基于温度控制的电流检测系统能够准确计算当前电流值与仪器温度值,及时准确与上位机(PC)通信。文中设计的温度范围控制在7℃~13℃,测量精度±0.1℃,相对应的电流初始值大约在3000 mA左右,测量精度±1mA;可调节相应参数适用于其他场合。

Based on the temperature control ofthe biochemical analyzer, a high-precision current detection system is designedin this paper. The design mainly includes the hardware circuit, softwareprogram and temperature control algorithm of the current detection system. Thehardware content includes temperature and current detection circuit,refrigeration module, CAN communication module, display module. Use KEIL MDKsoftware to develop the main control program of the current detection system.The temperature control algorithm adopts PID algorithm. Through multiple teststo verify the relevant parameters, the current detection system based ontemperature control designed in the article can accurately calculate thecurrent value and the instrument temperature value, and communicate with theupper computer (PC) in time and accurately. The temperature range designed inthe article is controlled at 7˚C~13˚C, the measurement accuracy is ±0.1˚C, andthe corresponding current value is about 3000 mA, the measurement accuracy is ±1mA. The corresponding parameters can be adjusted for other occasions.