Research On Dynamic Measurement Errors Compensation Technology Of Transient Surface Temperature Sensor

Against the background of transient temperature measurement, the research work about technology of dynamic modeling and measurement errors compensation, correlatively to the topic of the dynamic characteristics and its improvement of temperature measurement system, is described in detail. It includes experimental and simulation research.Firstly, the study actuality of transient temperature measurement, dynamic modeling and dynamic measurement errors compensation is analyzed. Transient temperature is important in the weaponry measurement and other fields. But the transient temperature varies fast and the measurement environment is unfavorable. The response speed of sensor is larger than the transient temperature varying speed and there are great dynamic errors between measured results and the real signal for the thermal inertia and finite thermal conduct of the sensor. There are great development in dynamic modeling and dynamic errors compensation, and lots of correlative research findings are presented. Then the cause for dynamic errors and its effect is studied, and the dynamic property of measurement system is also analyzed. According to the requirement of inject signal, the dynamic calibration system is designed, and the surface temperature sensor is calibrated using the laser heating method. Using the dynamic calibration I/O data of transient surface temperature sensor, the model of this temperature measurement system is constructed with the system identification method and the validity of this method is also testified by the cross-validation method. Then the inverse problem, well-posed-ness and regularization method are introduced. Three kinds of inverse filters are designed by choosing three kinds of different stabilized functional to regularize the ill-posed problem, and the dynamic measurement errors compensation simulation research of the inverse filters is carried out to validate the compensation effect. Finally, the inverse filterer method, proposed by Dr. Nahman and Guillaume, is used to compensate the temperature measurement system, and the system dynamic property is amended: the dynamic errors are reduced and the work bandwidth is widened evidently. The compensation results are also provided.