一个高温持久/蠕变测控温及试验管理系统

A Temperature Measuring/Controlling and Experimental Management System for Stress-rupture/Creep Test Machines

介绍了采用测控分开形式对近百台五六十年代制造的高温持久/蠕变试验机进行测控温系统改造的工作。改造后的控温系统创造了不同热电偶数量(测控温共偶,1～3支)都可实现对试样温度和梯度的稳定控制,系统具有较强抗外界干扰能力,而且控温过程中对电网无干扰。测量系统测量误差≤±0.1%FS。测控温系统采取单炉闭环控制、30台集中巡回检测的方法,并针对多台试验机且不同时启停的特点合理编程,建立了一个有特色的具备人/机共同管理功能的自动化试验管理系统。该系统在十余年的连续运行中,稳定可靠,经济效益显著,是一个适用的高温持久/蠕变测控温及试验过程管理系统。

This paper describes a temperature measuring and controlling system for hundred old creep testing machines,which have been used around 50 years.The unique design strategy of the developed system is to use independent control and measurement equipments.Under the controlling of the developed system the temperature gradient on specimen is stable even if the specimen length varies,in which case the thermocouple number is different.An effective filtering policy is used so that the temperature measuring and controlling system is not sensitive to the power surges.And the controlling system itself does not make current surges to the power system.The accuracy of the measuring system is less than ±0.1% full scale.The measuring system monitors the temperatures in groups of 30 creep test machines.A computer management software is programmed to scan and record the temperatures of each test machines.The friendly interface of the software allows easy operation and creep testing automation.The temperature measuring and controlling system has been running for about 10 years reliably.A great amount of testing works have been carried out by these testing machines equipped with the developed temperature measuring/controlling system.