Research On The Calibration Technology Of Temperature Sensor Based On Constant Speed Rising And Cooling Excitation Method

Temperature measurement plays a very extensive and key role in scientific research and production.Its accuracy is a necessary condition to ensure the smooth operation of relevant research and product use,the verification or calibration of temperature sensor is the main way to ensure the accuracy of temperature measurement,so the related research work of temperature sensor calibration technology becomes more and more important.The traditional temperature sensor calibration technology takes a long time to control the temperature and needs to wait for the temperature field of the calibration device on each temperature point to be stable before the subsequent measurement and calculation.Therefore,it has low working efficiency,high cost,complex manual operation steps and can only get the calibration results of individual temperature points,which can not meet the needs of rapid verification or calibration of temperature sensors.In order to solve the problem,this paper studies the calibration technology of temperature sensor based on the constant speed rising and falling temperature excitation method,and designs and constructs the relevant calibration device.In order to improve the efficiency of temperature sensor calibration,a round of constant speed temperature rise and fall control is used instead of the traditional constant temperature calibration method.In the research process of this paper,the main work is as follows:First of all,it introduces the display and development trend of temperature calibration technology and devices at home and abroad,and makes clear the research purpose and significance of this paper.A new calibration technology of temperature sensor based on constant speed up and down temperature excitation method is proposed.The principle of the calibration technology is studied theoretically,and the related uncertainty factors that affect the calibration results are analyzed to provide theoretical basis and guidance for the follow-up research;Secondly,the design scheme of the furnace structure of the calibration device is established,and the physical model is established by using the simulation software.The influence of various factors on the temperature field performance of the calibration furnace is analyzed by simulation.The design structure is optimized by numerical thermal analysis,the final design scheme of the calibration furnace is determined,and the calibration process is simulated,which provides reference for the later experiments;Then,the software and hardware of the calibration device system are designed and introduced in detail.Based on C8051F340 single-chip microcomputer,a multi-channel data acquisition and storage system is designed,and the corresponding human-computer interaction upper computer software is designed on VB6.0 platform to complete the construction of the calibration device;Finally,the calibration device designed,installed and debugged is tested to verify the performance of the calibration device.The experimental results show that the calibration device meets the requirements of the design index and achieves the needs of rapid calibration.After a round of temperature control cycle,a large number of temperature point calibration results of the calibrated temperature sensor can be obtained,which greatly improves the calibration efficiency of the temperature sensor.The calibration technology studied in this paper is novel and innovative,which provides new feasibility for temperature calibration and provides a new and efficient temperature calibration method and technical approach for the measurement industry.