This paper analyzes and discusses the working principle,testing method,design scheme,and advantages and disadvantages of temperature control for safety-grade DCS fans. Conduct fault injection testing on the design method of calculating the weighted average of two temperature collected values,and propose three optimization solutions based on the two risk issues identified during the testing process. firstly,design only one temperature sensor. Secondly,design two temperature sensors and take the average of the two collected values. The temperature collected by the faulty sensor is invalid. Thirdly,design two temperature sensors,default to the first collected value,and only take the second collected value when the first temperature sensor fails. After comparative analysis,it is recommended to use two temperature sensors and consider sensor fault diagnosis from multiple perspectives,aiming to provide reference for the design of temperature control for safety-grade DCS fans.
维普
万方数据