【作者】 郭云；

【导师】 马殿光； 王卫；

【作者基本信息】 上海交通大学 ， 电气工程， 2012， 硕士

【摘要】 高低温实验是可靠性测试中的一种。它主要适用于实验产品整体或者产品部件在高低温环境下，检验其各项性能指标。它是在高低温实验箱中完成的。一般来说在高低温实验中，需要箱体稳定在特定的温度长达数小时，甚至数十小时，在此期间，箱体内部属于密闭状态。在实际测试中，被测试的样品是气相色谱仪。它是一种化学分析仪器。当气相色谱仪工作的时候，需要用到气体，其中包括氢气。氢气具有一定的危险性，它是可燃性的气体，能与空气混合形成爆炸性的混合物，遇到明火就会发生爆炸。因此当气相色谱仪在进行高低温实验的时候，如果发生氢气泄露，氢气浓度会由于密封的箱体而增大，就会有爆炸的可能。在这种情况下，本文作者设计了一个系统。它能够检测高低温实验箱中的氢气的浓度。当箱体内氢气浓度出现异常的时候，系统能够自动地报警，并且切断箱体内实验仪器的电源以及气源。此系统现已完成设计、制作、安装、调试等一系列工作并成功运行在安捷伦科技（上海）有限公司质量部的高低温实验室。它的成功运行，很大程度地降低了气相色谱仪在高低温实验中的危险性，并且可以有效的防止气体浪费，从而降低了运行成本。本文详细介绍了自制的氢气安全控制系统的重要性，系统的组成和工作原理，验证系统的方法，实验结果以及一些改进系统的设想。更多还原

【Abstract】 Temperature test is one kind of the reliability test. It is a test which can measurethe performance of the whole product or parts of the product in different temperature.This test is done in the temperature chamber. Generally, since the chamber will be setto a certain temperature for several hours, even for dozens of hours. During thetemperature test, the inside of the chamber is tight.Gas chromatography system which is our company’s product is the test sample inthe reality test. It is a chemical-analyzed instrument. When it works, it needs gas,including the hydrogen. Hydrogen has risk. It is flammable gas. It can be theexplosion mixture when it mixes with the air and will explode when it meets the fire.So when the gas chromatography system is during the temperature test, if thehydrogen leaks which makes the hydrogen concentration high because of the sealedchamber, the hydrogen may explode.Under this condition, the author designs a system which can measure thehydrogen concentration in the temperature chamber. When the concentration of thehydrogen in the chamber is abnormal, the system will alarmed automatically and cutoff the power and gas of the test unit in the chamber. Now this system is finisheddesigning, assembling, setting, verifying and running in the Agilent Technology(Shanghai) Ltd. It is the running of this system that decreases the risk of thetemperature test when the gas chromatography system is testing. And this system canalso avoid the gas wasting, so that decreases the company’s cost.This article introduces the importance, structure, principle, verification method and the result of this hydrogen safety control system. And some improvementproposal is also in this article.更多还原