Biological gas detection apparatus and biological gas detection method

Patent metadata

Field	Value
Publication number	US-9410912-B2
Application number	US-201213978576-A
Country	US
Kind code	B2
Filing date	May 18, 2012
Priority date	May 27, 2011
Publication date	Aug 9, 2016
Grant date	Aug 9, 2016

Abstract

A biological gas detection apparatus of an embodiment of the present invention includes: a sensor unit including plural types of gas sensors; a control unit of the sensor unit; a data recording unit; and a data analyzing unit, wherein the data recording unit includes a database on properties of sensitivities of the gas sensors for a single body of a desired gas component, a single body of an interference gas component, and a mixed gas of these that are included in the biological gas, and the data analyzing unit calculates concentration of the desired gas component based on sensitivities of the gas sensors output when detecting the biological gas and the database.

First claim

The invention claimed is:

1. A biological gas detection apparatus comprising:
a sensor unit including plural types of gas sensors;
a control unit of the sensor unit;
a data recording unit; and
a data analyzing unit, wherein
the data recording unit includes a database on properties of sensitivities of the gas sensors for a single body of a desired gas component, a single body of an interference gas component, and a mixed gas of these that are included in the biological gas, and
the data analyzing unit calculates concentration of the desired gas component based on sensitivities of the as sensors which are output when performing detection of the biological gas and the properties of sensitivities of the gas sensors included in the database, and
if a sum of sensitivity of the gas sensors is greater than a predetermined first threshold, the biological gas detection apparatus determines that the concentration of the desired gas component is very low as though the desired gas component can be regarded as being absent, or that there is a problem during measurement.

2. The biological gas detection apparatus as claimed in claim 1 , wherein
two types of the gas sensors are provided, in which a first gas sensor is a semiconductor type gas sensor having relatively high detection capability for the desired gas component, a second gas sensor is a semiconductor type gas sensor that has detection capability at least for the interference gas component and that has sensing gas properties different from the first gas sensor.

3. The biological gas detection apparatus as claimed in claim 1 , wherein
the desired gas component is acetone.

4. The biological gas detection apparatus as claimed in claim 1 , wherein
main gas components of the interference gas component are ethanol and hydrogen, and at least one type of these is an interference gas for the desired gas component.

5. The biological gas detection apparatus as claimed in claim 1 , further comprising:
a biological gas introduction unit configured to introduce the biological gas into the sensor unit.

6. A biological gas detection apparatus comprising:
a sensor unit including plural types of gas sensors;
a control unit of the sensor unit;
a data recording unit; and
a data analyzing unit, wherein
the data recording unit includes a database on properties of sensitivities of the gas sensors for a single body of a desired gas component, a single body of an interference gas component, and a mixed gas of these that are included in the biological gas, and
the data analyzing unit calculates concentration of the desired gas component based on sensitivities of the gas sensors which are output when performing detection of the biological gas and the properties of sensitivities of the gas sensors included in the database, and
if sensitivity of a second gas sensor is greater than a predetermined threshold, the biological gas detection apparatus calculates concentration of the desired gas component based on a sensitivity of a first gas sensor output when performing detection of the biological gas and the properties of sensitivities of the gas sensors included in the database.

7. A biological gas detection apparatus comprising:
a sensor unit including plural types of gas sensors;
a control unit of the sensor unit;
a data recording unit; and
a data analyzing unit, wherein
the data recording unit includes a database on properties of sensitivities of the gas sensors for a single body of a desired gas component, a single body of an interference gas component, and a mixed gas of these that are included in the biological gas, and
the data analyzing unit calculates concentration of the desired gas component based on sensitivities of the gas sensors which are output when performing detection of the biological gas and the properties of sensitivities of the gas sensors included in the database, and
if sensitivity of a second gas sensor is equal to or less than a predetermined threshold and a sensitivity ratio of a first gas sensor and the second gas sensor is greater than a predetermined second threshold, the biological gas detection apparatus calculates concentration of the desired gas component based on a sensitivity of the first gas sensor output when performing detection of the biological gas and the properties of sensitivities of the gas sensors included in the database.

8. A biological gas detection apparatus comprising:
a sensor unit including plural types of gas sensors;
a control unit of the sensor unit;
a data recording unit; and
a data analyzing unit, wherein
the data recording unit includes a database on properties of sensitivities of the gas sensors for a single body of a desired gas component, a single body of an interference gas component, and a mixed gas of these that are included in the biological gas, and
the data analyzing unit calculates concentration of the desired gas component based on sensitivities of the gas sensors which are output when performing detection of the biological gas and the properties of sensitivities of the gas sensors included in the database, and
if sensitivity of a second gas sensor is equal to or less than a predetermined threshold and a sensitivity ratio of a first gas sensor and the second gas sensor is equal to or less than a predetermined second threshold, the biological gas detection apparatus calculates concentration of the interference gas component based on a sensitivity of the second gas sensor output when performing detection of the biological gas and the properties of sensitivities of the gas sensors included in the database, and calculates concentration of the desired gas component based on the interference gas component concentration, a sensitivity of the first gas sensor output when performing detection of the biological gas and the properties of sensitivities of the gas sensors included in the database.

9. A biological gas detection apparatus comprising:
a sensor unit including plural types of gas sensors;
a control unit of the sensor unit;
a data recording unit; and
a data analyzing unit, wherein
the data recording unit includes a database on properties of sensitivities of the gas sensors for a single body of a desired gas component, a single body of an interference gas component, and a mixed gas of these that are included in the biological gas, and
the data analyzing unit calculates concentration of the desired gas component based on sensitivities of the gas sensors which are output when performing detection of the biological gas and the properties of sensitivities of the gas sensors included in the database, and
if sensitivity of a second gas sensor is greater than a predetermined threshold, the biological gas detection apparatus calculates concentration of the desired gas component based on sensitivity of a first gas sensor output when performing detection of the biological gas and the properties of sensitivities of the gas sensors included in the database.

10. A biological gas detection apparatus comprising:
a sensor unit including plural types of gas sensors;
a control unit of the sensor unit;
a data recording unit; and
a data analyzing unit, wherein
the data recording unit includes a database on properties of sensitivities of the gas sensors for a single body of a desired gas component, a single body of an interference gas component, and a mixed gas of these that are included in the biological gas, and
the data analyzing unit calculates concentration of the desired gas component based on sensitivities of the gas sensors which are output when performing detection of the biological gas and the properties of sensitivities of the gas sensors included in the database, and
if sensitivity of a

Assignees

• Yamada Yuuki
• Hiyama Satoshi
• Moritani Yuki
• Sugimura Mariko
• Onaga Kazuo
• Tanaka Katsuyuki
• Ntt Docomo Inc
• Fis Inc

Inventors

• Yamada Yuuki
• Hiyama Satoshi
• Moritani Yuki
• Sugimura Mariko
• Onaga Kazuo
• Tanaka Katsuyuki

Classifications

• G01N33/0031 Primary

  comprising two or more sensors, e.g. a sensor array · CPC title

• G01N27/12 Primary

  of a solid body in dependence upon absorption of a fluid; of a solid body in dependence upon reaction with a fluid {, for detecting components in the fluid} · CPC title

• G01N33/497

  of gaseous biological material, e.g. breath · CPC title