Dynamic Characteristics Simulation of Heated Differential Thermal Resistance Water Level Sensor
Due to factors such as liquid level changes,heat transfer methods,and ambient temperature,the dynamic characteristics of the heating differential resistance water level sensor are unstable.Therefore,simulation analysis is carried out on it.Based on the analysis of the sensor measurement principle,the sensor output response under the thermal time constant response of the sensor is simulated to confirm the influencing factors of dynamic performance.The simulation results show that the higher the test ambient temperature,the more gentle the change of the tempera-ture dynamic characteristics of the water level sensor,on the contray,the steeper the curve will be.When the water level gradually rises,the response time only needs a few seconds,when the water level starts to decline,the response time is longer,after optimizing and adjusting the temperature dynamic characteristics of the sensor by the proposed method,the maximum error of water level measurement is only-0.08 cm,and the average relative error of measure-ment is 0.03 cm,which effectively improves the accuracy of the sensor.
water level sensordifferential thermal resistanceoutput responsemeasurement principledynamic charac-teristic analysis
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