公开(公告)号：US3877291A

公开(公告)日：1975-04-15

申请号：US34256673

申请日：1973-03-19

Applicant: BORG WARNER

Inventor： HOPPESCH JOSEPH P ,  SCHUBERT STUART A

IPC: G01N27/04 ,  G01N27/12 ,  G01N33/497 ,  G01N27/14

CPC classification number: G01N27/122 ,  G01N33/4972

Abstract: A breath tester, in two embodiments, employing an alcohol detecting element (e.g. a zinc oxide semiconductor element) which, prior to use, is purged by pumping ambient air across it and maintaining it at a higher than normal operating temperature. In use, after a purging period the air pumping is stopped and the detector heaters are turned off, while breath is directed to the detector and any resulting change in properties (conductivity/resistivity) is sensed and signaled. The first embodiment is largely manually operated and uses a meter to signal both the breath alcohol concentration, and also the purged state of the detecting element. The second embodiment is largely automatic, includes timers and interlocks to prevent misuse, and employs lights to signal its outputs (''''fail,'''' for over one BAC level, ''''warn'''' for over a lower BAC level and ''''pass'''' for under that level) as well as its operational status (''''power'''' on, ''''wait,'''' ''''ready,'''' ''''test''''). Both embodiments may be battery powered and means for sensing and signaling the charge level on the batteries is disclosed.

Abstract translation: 在两个实施方案中，呼吸测试仪采用酒精检测元件（例如氧化锌半导体元件），其在使用之前通过泵送环境空气并将其保持在高于正常工作温度而被清除。 在使用中，在清洗期间，空气泵送停止并且检测器加热器被关闭，同时呼吸被引导到检测器，并且任何所得到的特性（电导率/电阻率）的变化被感测和发出信号。 第一实施例主要是手动操作的，并且使用仪表来表示呼吸酒精浓度以及检测元件的清除状态。 第二个实施例很大程度上是自动的，包括定时器和互锁以防止误用，并采用灯光来表示其输出（“失败”超过一个BAC级别，“警告”超过较低的BAC级别，并在该级别“通过” ）以及其运行状态（“权力”，“等待”，“准备”，“测试”）。 两个实施例可以是电池供电的，并且公开了用于感测和指示电池上的充电水平的装置。