LabVIEW软件在储氢材料性能测试装置的泄漏率评价中的应用

Application of LabVIEW software in measuring the leakage rate of hydrogen storage material performance test apparatus

储氢材料性能测试主要包括PCT曲线和动力学曲线的测试,一般采用基于容量法原理的测试装置完成。由于测试方法决定测试结果对氢气泄漏非常敏感,因此在进行相关测试之前有必要对系统的泄漏率进行评估。为了使泄漏率评估过程更加科学、规范、可靠、具有效率,本文对有关泄漏率的测试原理,流程和关键要点进行了系统介绍,详细阐述了如何通过Lab VIEW软件编程实现泄漏率自动测试程序,其中包括阀门控制、数据采集和存储、被测腔体氢气摩尔量变化曲线和泄漏率数据的实时输出以及Excel报表自动生成的功能。实验研究结果表明:该泄漏率测试程序能够满足此类系统的测试需求,所搭建的测试系统密封良好可用于储氢材料性能测试。

The performance test of hydrogen storage material mainly includes PCT curve test and kinetic curve test, which are mostly completed on the device based on volumetric principle. However, this kind of test method determines that the test results are very sensitive to hydrogen leakage. Thus, it is necessary to evaluate leakage rate of the system before relevant tests are carried out. In order to make the evaluation process more scientific, standard, reliable and efficient, this paper systematically introduced the principle, process and key points of leakage rate test, and elaborated how to realize the leakage rate automatic test program through LahVIEW software programming. The test program included the functions of valve control, data acquisition and storage, real time output of hydrogen gas molar quantity curve and leakage rate data of the test chamber, and automatic generation of Excel report. The experimental results indicated that the leakage rate test program could meet the test requirements of this kind of system, the system sealed well and could test hydrogen storage material performance.