呼吸道防护装备佩戴密合度测定仪的研制

Development of a fit tester of wearing protective equipment for respiratory tract

目的:根据呼吸道防护装备佩戴的要求,研制可对多种呼吸道防护装备与佩戴者面部密合度进行测试的密合度测定仪。方法:人员呼吸道防护装备佩戴密合度测定仪的硬件采用粒子生长技术和激光粒子计数技术,建立微气压传感技术,设计仪器的机械结构和控制系统结构;利用所研制的ZR-1220呼吸器密合度测定仪,测试300人次的防护口罩密合度,分析口罩的型号、佩戴方式、佩戴后人的面部表情及动作对口罩防护能力的影响。结果:经实验测试,该仪器设置的8个测试参数,即正常呼吸→深呼吸→左右摇头→上下摆头→朗读→做鬼脸→弯腰摸脚趾→正常呼吸,均满足密合度测试要求,且操作简便,系统界面友好。密合度测试软件针对人员在不同面部动作和面型下防护装备佩戴密合度的算法,解决检测信号与实际数值的对应关系,建立人机交互界面。结论:密合度测定仪性能达到国外同类仪器的性能指标,可以用作评价呼吸道防护装备面型密合度的测试仪器。

Objective:To develop a fit tester that can test the fits of multi-protective equipment for respiratory tract and face of persons who wore this equipment,according to the requirements of the wearing of protective equipment for respiratory tract.Methods:The hardware of fit tester adopted particle growth technique and laser particle counting technique to establish micro-pressure sensor technique so as to design mechanical structure of this instrument and constitutive structure of control system.The fit tester of ZR-1220 respirator was used to test the fit of mask of 300 person-time,and then the type of mask,wearing way,the facial expression post wearing and the effect of action on protective ability of mask.Results:The results indicated that the 8 measuring parameters,included normal breath,deep breath,shaking head(left and right),oscillation(up and down),reading,making a mouth,stooping to touch toe and normal breath,could meet the requirement of fit test.And it's operation is convenient and its interface is friend.Besides,the algorithm of fit testing software about wearing fit of protective equipment under differently facial gesture and differently facial shape has resolved the corresponding relationship between detection signal and actual value,and has established the human-computer interaction interface.Conclusion:The performance of fit tester has reached the performance index of similar instruments of abroad,and it can be used as a testing instrument to evaluate the fit of facial shape of protective device for respiratory tract.