基于阶跃温度响应的热电偶时间常数测试系统

Test system of time constant based on step temperature response

为了更方便地测试热电偶时间常数,设计了一套热电偶时间常数测试系统,包括工控机、信号调理电路、A/D采集、数据采集处理软件和打印机等。根据热电偶对阶跃温度的响应,提出了一种全新的热电偶时间常数测试方法,设计功能完善的信号调理电路,通过PCL818L数据采集卡将采集的数据送交上位机应用软件进行分析处理,得到所需要的热电偶参数,应用软件提供各类报表输出及数据打印功能。

In order to facilitate the test of thermocouple time constant,a thermocouple time constant test system was designed.The system is composed of IPC,signal conditioning circuit,A/D collecting card,data processing software and printer.In addition,a new method for testing the time constant of thermocouple was proposed according to its response to phase step temperature.By the PCL818L card,the data was collected and transferred to application software for analysis,by which the desired parameters of thermocouple can be obtained.The application software provides all types of reporting forms output and data printing.