基于等温线辨识的示温漆标定装置设计与实现

Calibration Device Design for Temperature Indicating Coatings based on Isothermal Identification

针对示温漆的技术性能和使用要求,设计了一种准确度高、结构简单、工作效率高、成本低廉的示温漆标定装置。该装置采用自动判读软件识别示温漆的变色等温线;采用T型试片涂覆所测示温漆,采用K型铠装热电偶采集温度和PID调节器控制温度,能够提供宽温度梯度分布,一次完成示温漆的全部温度点的标定。其测量温度范围为100～1350℃,测量结果的标准不确定度小于4.43℃。该装置已应用于示温漆的标定,为建立示温漆标定标准及量值溯源奠定了基础。

According to the technology specification and application requirements of temperature indicating coatings,a kind of calibration device is designed.It has the advantages of high accuracy,simple structure,high efficiency and low cost.It introduces auto-recognition to identify the isothermal line of the temperature indicating coatings;Temperature indicating coatings is painted on a T type piece and K type thermocouple and PID adjustment are used to measure and control the temperature respectively.The device can provide wide range temperature distribution and make sure all the points are covered in one calibration.Its temperature range from 100~1350℃. The standard uncertainty is less than 4.43℃.It has been applied in temperature indicating coatings calibration and it can provide reference to buide temperature indicating coatings calibration standard and Traceability system.