Low Cost Active End-of-Service-Life Indicator for Respirator Cartridges

项目摘要 在职业环境中佩戴空气净化呼吸器，以防止呼吸道危害，包括有毒物质 蒸汽和气体。不幸的是，用户通常不知道何时更换墨盒， 突破发生了。因此，必须整合使用寿命终了指标系统 当需要更换呼吸器滤筒时，当前挑战 开发ESLI系统的内容包括湿度的影响，以及选择性、尺寸、重量和功率 限制.此外，制造商更喜欢将传感器成本限制在每个盒约1美元，并且每个盒20 - 50美元。 传感器相关的固定装置和电子设备。只有有限数量的比色无源ESLI在商业上是可行的。 可用，并且它们依赖于颜色变化的主观视觉识别。用户必须定期监测 传感器的颜色变化，这分散了他们的工作。没有活性ESLI是NIOSH批准的。智能光 系统公司(IOS)提出了一种低成本的有源ESLI系统，包括敏感的光纤 进入呼吸筒以监测污染物;当 墨盒达到90%饱和度。

Project Summary Air-purifying respirators are worn in occupational settings to protect against respiratory hazards, including toxic vapors and gases. Unfortunately, the user generally does not know when to change the cartridge before breakthrough occurs. It is therefore essential to have an end-of-service-life indicator (ESLI) system integrated with the respirator cartridge to warn the user when it is time to change cartridges. Current challenges in developing ESLI systems include the effects of humidity, as well as selectivity, size, weight, and power restrictions. Additionally, manufacturers prefer to limit sensor costs to about $1 per cartridge, and $20–$50 for sensor-related fixtures and electronics. Only a limited number of colorimetric passive ESLIs are commercially available, and they rely on subjective visual identification of a color change. Users must routinely monitor the sensor for color change, which distracts from their work. No active ESLI is NIOSH-approved. Intelligent Optical Systems, Inc. (IOS) proposes to develop a low cost active ESLI system by incorporating sensitive optical fibers into the respiratory cartridge to monitor for contaminants; an audible/visual alarm will be triggered when the cartridge reaches 90% saturation.