生物安全实验室气密性检测仪的研制

摘要

目的:开发用于生物安全实验室中设施设备压力衰减法气密性检测的自动化仪器,以提高检测效率.方法:基于压力衰减检测法的特点及生物安全实验室设施设备的性能特性,采用可编程逻辑控制器(programmable logic controller,PLC)、触摸屏等工控设备设计该装置,通过编写PLC控制程序和触摸屏程序实现预定功能.结果:该仪器可实现多通道自动化并行检测,能实时监测和记录被测对象的压力、温度数据,从而实现趋势预判.结论:使用该仪器可以大大缩短检测周期,减少人力物力投入,适用于生物安全实验室中设施设备的气密性检测.%Objective To develop an instrument for automatic testing of airtightness of the equipment and facilities in biosafety laboratory using pressure decay method with an aim at improving testing efficiency.Methods On the basis of the characteristics of the pressure decay method and the equipment performance in the biosafety laboratory,the PLC and touch screen and etc,industrial control instrument was employed for designing the structure and components.By programming PLC and touch screen the intended functions were achieved.Results This developed instrument could be used for automatic and multi-channel air tightness testing in parallel,as well as for monitoring and recording the pressure and temperature data of the equipment in real time.Conclusion By using the developed instrument,the testing cycle,and the manpower and material resources input can greatly be reduced.It is presumed that the instrument can be used for testing the airtightness of facilities and equipment in biosafety laboratory.