专利快速检索-快速检索全球专利，免费商用专利数据库-IPRDB

1. 发明授权

US5608384A Method and apparatus for monitoring for the presence of a gas 失效
标题翻译：用于监测气体存在的方法和装置
公开(公告)号：US5608384A
公开(公告)日：1997-03-04
申请号：US965442
申请日：1992-10-23
申请人： George H. Tikijian
发明人： George H. Tikijian
IPC分类号： G01M3/00 , G01M3/20 , G01N27/62 , G01N33/00 , G08B21/00 , G08B21/16 , G08B17/10
CPC分类号： G01N33/0052 , G01N27/626 , G01N33/0063
摘要： There is a method and disclosed apparatus for detecting for the presence within a gaseous atmosphere of a gas of a concentration above a preset level. The detecting apparatus comprises a sensor including a heater/anode element and a collector/cathode element disposed to define a space therebetween through which the gaseous atmosphere flows. An actuable power supply is coupled to the heater/anode element and to the collector/cathode element for applying power thereto, whereby ionization of the gas causes a current flow through the collector/cathode element of a magnitude proportional to the concentration level of the gas in the gaseous atmosphere. An actuable alarm means provides an indication of the presence of the gas above the preset level. Detecting apparatus control operates the detecting apparatus in a monitoring mode, wherein the power supply is actuated and the alarm deactuated to detect and compare the current flow with the preset level. Upon first detecting current which is equal to or exceeds the preset level, the control operates the detecting apparatus in a leak wait mode, wherein the power supply is actuated and the alarm deactuated to initiate the timing of a period while comparing throughout the period detected current flow with the preset level. If the detected current flow remains equal to or greater than the preset level until the period times out, the control operates the detecting apparatus in an alarm mode, wherein the power supply is deactuated and the alarm is actuated.
摘要翻译：存在一种方法和公开的装置，用于检测浓度高于预设水平的气体在气体气氛中的存在。检测装置包括传感器，该传感器包括加热器/阳极元件和集电极/阴极元件，该集电极/阴极元件设置成限定气体大气流过的空间。可致动的电源耦合到加热器/阳极元件和用于向其施加电力的集电器/阴极元件，由此气体的电离导致电流流过集电极/阴极元件，其大小与气体的浓度水平成正比在气氛中。可启动的报警装置提供气体在预设水平以上的存在的指示。检测装置控制在监视模式下操作检测装置，其中启动电源并且停止警报以检测并比较当前流量与预设电平。在第一次检测到等于或超过预设电平的电流时，控制器以泄漏等待模式操作检测装置，其中电源被启动，并且在整个周期期间比较检测到的电流的同时，启动警报以启动一段时间的定时流量与预设水平。如果检测到的电流保持等于或大于预设电平直到周期超时，则控制器以报警模式操作检测装置，其中电源被停止并且报警被致动。

IPRDB

热门服务

关于我们

友情链接

联系方式