CHEN Yi-jun, GUO Xing-min. Application of variable-coefficient PID temperature controlling system in semiconductor gas sensor[J]. 2017, 36(10): 154-156+160.
CHEN Yi-jun, GUO Xing-min. Application of variable-coefficient PID temperature controlling system in semiconductor gas sensor[J]. 2017, 36(10): 154-156+160. DOI: 10.13873/J.1000-9787(2017)10-0154-03.
变系数PID控温系统在半导体气体传感器中的应用
摘要
提出了一种用于半导体气体传感器的温度控制电路
包含键盘输入、液晶显示、温度采集、数控调压等模块
采用变系数PID算法实现对降压模块输出电压的调控
控制气敏元件的温度。实验表明:与恒压加热和常规PID控温相比
变系数PID控温的调节时间短、超调量小
具有较强的抗干扰能力。350℃加热时
与恒压加热相比调节时间从234 s缩短到了6 s
当环境温度从30℃变化到50℃时恒压加热敏感元件温度上升9℃
而改进后温度变化不超过0.3℃
是一种很有潜力的半导体型气体传感器控温系统。
Abstract
A temperature control circuit of PID for the sensor by STC microcontroller
LCD screen
temperature collection and digital voltage regulation modules and so on. On this basis
variable-coefficient is used to advance the PID algorithm. The experimental data show that the settling time required is shorter as compared with constant voltage heating
decreasing from 234 s to 6s when it is heated at 350 ℃. It also has the strong anti-disturbing capability in which the temperature fluctuated decreased from 9 ℃ to 0. 3 ℃ as compared with constant voltage heating
when environmental temperature changed from 30 ℃ to 50 ℃ at the same heating temperature. Therefore
it is a potential heating method for semiconductor gas sensors.