试差控温法在低温恒温恒压测试系统中的应用  

Application of Trial and Error Method in Temperature Control of Constant Temperature and Constant Pressure Cryogenic Experiment System

作　　者：耿亚璋 曹建[1] 尚宇[1] GENG Ya-zhang;CAO Jian;SHANG Yu(Beijing Institute of Aerospace Testing Technology,Beijing 100074,China)

机构地区：[1]北京航天试验技术研究所,北京100074

出　　处：《化工管理》2021年第1期137-138,共2页Chemical Engineering Management

基　　金：国防科工局技术基础科研项目“航天液体发动机试验低温压力传感器现场校准技术研究”(JSJC2013203A001)。

摘　　要：低温恒温恒压测试系统以试差法控制加热电源输出加热功率,改变测试容器在低温介质中的热环境,使测试容器在低温环境下同时达到温度和压力的稳定状态,实现了对测试容器中气体的温度和压力恒定控制。测试结果表明,该系统参数设置简便,温度波动度较小,运行安全可靠,能够满足化工行业中低温流体或传感器元器件的高精度热物性测量要求。In the constant pressure control system based on PID,an experimental system using trial and error method to perform constant temperature control at the same time was proposed.In order to make the heating wire work and change the heat of the experimental container in the cryogenic medium,the method enabled the experimental container to reach a stable state of temperature and pressure at the same time in a low-temperature environment,realizing constant control of the temperature and pressure of the gas in the experimental container.The experimental results showed that the system parameters were simple to set,and the temperature fluctuation was small,and the operation was safe and reliable,which could meet the requirements of high-precision and low-temperature fluids or components thermal measurements in chemical industry.

关 键 词：低温恒温器 恒压源 试差法控温 耦合控制 

分 类 号：TB661[一般工业技术—制冷工程] O231[理学—运筹学与控制论]