Kabushiki Kaisha Toyota Chuo Kenkyusho

Toyota Jidosha Kabushiki Kaisha

Toshiyuki Taguchi

Fumihiro Ushijima

Hazime Inagaki

Tetsuji Egawa

Katsumi Nawata

Kiyomi Sakakibara

Toshihiro Wakita

A concentration of ethanol is detected without using any light source such as a lamp by utilizing a face of a human being as a light source. The gas detecting apparatus has an optical filter for ethanol which allows to transmit an infrared light having a predetermined wavelength band including an absorption spectrum derived from a C&#x2014;O stretching vibration of ethanol contained in breath in an absorption spectrum generated by interaction with infrared light emitted from the face of a person, an optical filter for reference that allows to transmit an infrared light having a wavelength band emitted from the face of the person, a converting component for ethanol that converts the infrared light transmitted through the optical filter for ethanol to electric signals, a converting component for reference that converts an infrared light transmitted through the optical filter for reference to electric signals, and a detection component that detects the concentration of ethanol gas based on the electric signals converted by the converting component for ethanol and the electric signals converted by the converting component for reference.

Gas detecting method and gas detecting apparatus

There is provided a measuring apparatus for alcohol contained in an exhalation, the measuring apparatus measuring concentration of alcohol with a high accuracy in a short time. An alcohol sensor is provided inside an air passage to measure concentration of alcohol contained in air passing through the air passage. The alcohol sensor has a sensing element for sensing alcohol and a heating element for heating the sensing element. A suction pump is provided to the air passage so as to suction air from an inlet of the air passage. The sensing element is situated inside an air trapping chamber so that the air flowing through the air passage does not directly hit the sensing element.

Measuring apparatus for a component contained in exhalation

Growing community of inventors

Okazaki, Japan

Toshiyuki Taguchi