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1. 发明授权

US4057724A Determination of the alcohol content of blood 失效
标题翻译：测定血液中的酒精含量
公开(公告)号：US4057724A
公开(公告)日：1977-11-08
申请号：US667847
申请日：1976-03-17
申请人： Werner Karl Adrian , Robert Frank Borkenstein
发明人： Werner Karl Adrian , Robert Frank Borkenstein
IPC分类号： A61B5/145 , A61B5/1455 , G01N21/3504 , G01N21/59 , G01N33/497 , G01N21/26
CPC分类号： G01N21/3504 , G01N33/4972
摘要： A relationship exists between the concentration of ethanol in human breath and blood. Ethanol absorbs infra-red energy in the region of 3.46 mu. In this method the concentration of ethanol in breath is measured by collecting a sample in a chamber and passing through it a filtered, directional, and interrupted beam of infra-red energy at 3.46 mu. The path length is fixed. The exit energy falls on a tuned radiant energy detector. This beam is compared with a similar beam of radiant energy not capable of being absorbed by ethanol. The two signals are fed into a differential amplifier which activates a servo-system that moves a tapered radiant-energy absorbing medium in the path of one of the energy beams until a null condition is achieved. The distance the tapered medium must be moved to establish the null condition is measured by a potentiometer operably associated with it. The potentiometer provides a signal that can be displayed by an analog or digital device calibrated directly in units of blood or breath ethanol concentration.
摘要翻译：乙醇在人体呼吸和血液中的浓度之间存在关系。乙醇在3.46亩的地区吸收红外能量。在这种方法中，呼气中乙醇的浓度是通过在室中收集样品并通过其中过滤的，定向的和中断的红外能量束在3.46μm来测量的。路径长度固定。退出能量落在调谐辐射能量检测器上。将该光束与不能被乙醇吸收的类似的辐射能束进行比较。两个信号被馈送到差分放大器中，该差分放大器激活在能量束中的一个的路径中移动锥形辐射能量吸收介质的伺服系统，直到达到空值。锥形介质必须移动以建立零点条件的距离由与其可操作地相关联的电位计来测量。电位计提供的信号可以由直接以血液或呼吸乙醇浓度为单位校准的模拟或数字设备显示。

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