摘要
介绍了一种以高速单片机C8051F021为核心的高精度恒温箱温度控制系统,阐述了系统的工作原理、硬件设计及软件设计。系统利用基于恒流源的桥式测温电路采样温度值,使用增量式PID算法进行闭环控制,输出16位脉冲宽度调制波(PWM),经滤波后转换为电流信号控制晶闸管调温模块,达到精确调节温度的目的。通过标准仪器的标定,证明系统完全可以满足控制要求,此恒温箱温度控制系统的实际应用表明系统性能可靠、控制精度高、实用性强。
This paper introduced a high precision thermo tank temperature control system which is constituted by a high speed micro-chip C8051F021, described the principle, the hardware and software design of this system. The system sampled temperature with electrical bridge which is based on constant flow source, implemented a digital PID feedback control, output 16 b PWM waveforms, then changed into current to control the SCR, so it can adjust the temperature accurately. By the calibration check, it indicated that this system can totally meet the request of the control, the practical application of this thermo tank temperature control system indicates that this system is reliable performance, high precision and practicable.
出处
《电子测量技术》
2008年第9期147-149,共3页
Electronic Measurement Technology
