A Sensor for High Temperature Detection

A new nonmetal temperature sensor-graphite fiber thermoelectric couple is put forward in the paper,and the characteristics of the sensor,machining manner,and application environment are presented.The hardware circuit of the sensor including magnifying,filtering, analog to digital transducer and digital processing are designed.The method of subsection curve drafting is adopted to correct the non-linearity of sensor.Therefore the sensor has good reliability in larger temperature detection area.From the theoretical standpoint,the measurement temperature of the sensor is as high as 3 000 ℃,so the continuous measurement for molten steel temperature is possible.