公开(公告)号：US5291898A

公开(公告)日：1994-03-08

申请号：US886921

申请日：1992-05-22

申请人： Karl P. W. Wolf

发明人： Karl P. W. Wolf

IPC分类号： G01N33/497 ,  A61B5/08

CPC分类号： G01N33/4972

摘要： A hand held breath analyzer is energized when a mouthpiece tube is put into position. An ejector mechanism expels the mouthpiece, which de-energizes the system. The insertion of the mouthpiece not only cocks the ejector mechanism but closes a cover on an exhaust manifold of a breath sample passage. The breath sample passage includes a sample chamber with a port to receive a sampling tube fitting, and an auxiliary port. The exhaust manifold is long relative to the length of the sampling chamber and terminates in an orifice by means of which ambient air is drawn across a thermistor. The sampling tube communicates with a fuel cell chamber, into which breath is drawn by a diaphragm pump arranged, in its normal, uncocked condition, to inhibit the entrance of contaminants into the chamber. The diaphragm pump is actuated in response to operation of the thermistor, through a relay-tripped toggle linkage. A flag, connected to one of the toggle members, blocks the path of light from a photocell to a photoreceptor, insuring that the diaphragm pump is properly cocked for use before a breath sample is attempted to be taken.

摘要翻译： 当喉管放置就位时，手持式呼吸分析仪通电。 喷射器机构排出接口，从而使系统断电。 接口管的插入不仅使推出器机构旋转，而且关闭呼吸样本通道的排气歧管上的盖子。 呼吸样本通道包括具有接收采样管接头的端口的样本室和辅助端口。 排气歧管相对于采样室的长度是长的，并且终止于孔中，通过该孔将环境空气拉过热敏电阻。 采样管与燃料电池室连通，通过隔离泵在正常的未锁定状态下吸入呼吸，以阻止污染物进入腔室。 响应于热敏电阻的操作，隔膜泵通过继电器跳闸肘杆启动。 连接到其中一个切换构件的标志阻挡从光电管到光感受器的光路径，确保隔膜泵在试图取出呼吸样本之前被适当地打开以供使用。

公开(公告)号：US4770026A

公开(公告)日：1988-09-13

申请号：US3478

申请日：1987-01-15

申请人： Karl P. W. Wolf

发明人： Karl P. W. Wolf

IPC分类号： G01N33/00 ,  G01N33/497 ,  G01N27/16

CPC分类号： G01N33/4972 ,  Y10S436/90

摘要： Apparatus for measuring breath alcohol content by oxidizing breath alcohol in a fuel cell and utilizing substantially all of the electrons produced by said oxidation as a measure of the amount of alcohol contained in the sample. A working embodiment of the invention includes a resistor across terminals of the fuel cell with a resistance that is high enough to permit the voltage from the fuel cell to be accurately measured but low enough to permit the voltage to fall to a substantially steady minimum voltage within a time on the order of two minutes or less. The method of measuring breath alcohol concentration comprises integrating the entire area under the curve generated by the fuel cell output voltage between the beginning of oxidation of the alcohol in the fuel cell and the reaching of the substantially steady minimum.

摘要翻译： 用于通过氧化燃料电池中的呼吸酒精并利用基本上所有氧化产生的所有电子来测量呼吸酒精含量的装置作为样品中所含醇的量的量度。 本发明的工作实施例包括在燃料电池的端子之间的电阻器，其电阻足够高以允许来自燃料电池的电压被精确测量，但是足够低以允许电压下降到基本上稳定的最小电压 一个时间在两分钟以下的时间。 测量呼吸酒精浓度的方法包括在由燃料电池中的醇的氧化开始到达到基本稳定的最小值之间的燃料电池输出电压产生的曲线下的整个区域的整合。