公开(公告)号：US5239860A

公开(公告)日：1993-08-31

申请号：US699018

申请日：1991-05-13

申请人： Stephen J. Harris ,  Stephen J. Swarin ,  Michel F. Sultan ,  David K. Lambert ,  Michael D. Jack

发明人： Stephen J. Harris ,  Stephen J. Swarin ,  Michel F. Sultan ,  David K. Lambert ,  Michael D. Jack

IPC分类号： G01J5/12 ,  G01N21/31 ,  G01N21/35 ,  G01N33/28

CPC分类号： G01N21/359 ,  G01N21/3577 ,  G01N33/2852 ,  G01J5/12 ,  G01N21/314

摘要： An alcohol sensing device is provided for determination of the alcohol content within an alcohol/gasoline fuel mixture which is being provided for the operation of an internal combustion engine. The sensing device uses infrared spectrometry measuring techniques. The infrared sensing device determines the ratio of light absorption by the alcohol/gasoline mixture at two discrete wavelengths within the near-infrared spectrum. The two particular wavelengths of interest are preferably chosen so that at one of the infrared wavelengths, alcohol is strongly absorbing while the gasoline exhibits very little absorption, and at the second wavelength both the alcohol and the gasoline exhibit are essentially non-absorbing. An alternating current is used to switch the light beam between two power settings so as to vary the intensity of transmitted light at both wavelengths. The light beam is transmitted through the alcohol/gasoline fuel mixture so that the two discrete wavelengths traverse the same optical path. Two detectors are adjacently disposed so as to receive the emitted light from each wavelength after their transmission through the alcohol/gasoline fuel mixture. Once the signals corresponding to the two wavelengths are obtained, the ratio of the absorbances by the fuel mixture at both wavelengths is computed. From this ratio, and the temperature of the fuel mixture, the concentration of alcohol in the fuel is determined.

摘要翻译： 提供了一种酒精感测装置，用于确定用于内燃机操作的醇/汽油燃料混合物中的醇含量。 感测装置使用红外光谱测量技术。 红外感测装置确定近红外光谱中两个离散波长下的醇/汽油混合物的光吸收率。 优选选择感兴趣的两个特定波长，使得在红外波长的一个处，醇是强吸收的，而汽油表现出非常少的吸收，而在第二波长下，醇和汽油表现出基本上不吸收。 交流电用于在两个功率设置之间切换光束，以便改变两个波长的透射光的强度。 光束透过酒精/汽油燃料混合物，使得两个离散的波长穿过相同的光路。 两个检测器被相邻设置，以便在透过酒精/汽油燃料混合物之后接收来自每个波长的发射光。 一旦获得了对应于两个波长的信号，则计算两个波长处燃料混合物的吸光度比。 根据该比例和燃料混合物的温度，确定燃料中的醇的浓度。

公开(公告)号：US5262645A

公开(公告)日：1993-11-16

申请号：US754475

申请日：1991-09-03

申请人： David K. Lambert ,  Stephen J. Harris ,  Stephen J. Swarin

发明人： David K. Lambert ,  Stephen J. Harris ,  Stephen J. Swarin

IPC分类号： G01N21/31 ,  G01N21/35 ,  G01N33/28

CPC分类号： G01N21/314 ,  G01N21/3504 ,  G01N21/3577 ,  G01N21/359 ,  G01N33/2852

摘要： An alcohol sensing device is provided for determining the alcohol content within an alcohol/gasoline fuel mixture provided to an internal combustion engine. The sensing device uses infrared spectrometry measuring techniques. The infrared sensing device determines the ratio of light absorption by the alcohol/gasoline mixture at two discrete wavelengths within the near-infrared spectrum. The two particular wavelengths of interest are preferably chosen so that at one of the infrared wavelengths, alcohol is strongly absorbing while the gasoline exhibits very little absorption, and at the second wavelength both the alcohol and the gasoline exhibit are essentially non-absorbing. A light beam is transmitted through the alcohol/gasoline fuel mixture such that the two discrete wavelengths traverse the same optical path. A first and second detector are adjacently disposed so as to receive the emitted light from each wavelength after their transmission through the alcohol/gasoline fuel mixture. A third and fourth detector are adjacently disposed in proximity to the first and second detectors for sensing the drift in ambient temperatures corresponding to the first and second detectors. Once the signals corresponding to the two wavelengths are obtained and the signals corresponding to the ambient temperatures are factored out, the ratio of the absorbances by the fuel mixture at both wavelengths is computed. From this ratio and the fuel temperature the concentration of alcohol in the fuel is determined.

摘要翻译： 提供了一种酒精感测装置，用于确定提供给内燃机的醇/汽油燃料混合物中的醇含量。 感测装置使用红外光谱测量技术。 红外感测装置确定近红外光谱中两个离散波长下的醇/汽油混合物的光吸收率。 优选选择感兴趣的两个特定波长，使得在红外波长的一个处，醇是强吸收的，而汽油表现出非常少的吸收，而在第二波长下，醇和汽油表现出基本上不吸收。 光束通过酒精/汽油燃料混合物传播，使得两个离散的波长穿过相同的光路。 相邻地设置第一和第二检测器，以便在透过酒精/汽油燃料混合物之后接收来自每个波长的发射光。 第三和第四检测器相邻设置在第一和第二检测器附近，用于感测对应于第一和第二检测器的环境温度的漂移。 一旦获得对应于两个波长的信号，并且将与环境温度相对应的信号进行分解，则计算两个波长处的燃料混合物的吸光度比。 从该比率和燃料温度确定燃料中的醇的浓度。