ODOUR AND/OR GAS IDENTIFICATION SYSTEM

• US 20130244336A1
• Filed: 03/13/2013
• Published: 09/19/2013
• Est. Priority Date: 03/15/2012
• Status: Abandoned Application

• Current Assignee: Sensirion AG (Sensirion Holding AG)
• Original Assignee: Sensirion AG (Sensirion Holding AG)
• Inventors: MAYER, Felix, GRAF, Markus
• Application Number:
  US13/798,377
• Publication Number:
  US 20130244336A1
• Time in Patent Office: Days
• US Class Current: 436/147
• CPC Class Codes: G01N 33/0004 Gaseous mixtures, e.g. polluted air
• CPC Class Codes: G01N 33/0031 comprising two or more sensors, e.g. a sensor array

Abstract

A method for identifying an odour and/or gas, an odour and/or gas is measured with a portable electronic device comprising a chemical sensor, the chemical sensor being sensitive to different analytes. A measurement tuple is supplied which comprises a set of tuple elements with each tuple element of the set of tuple elements providing a value measured by a dedicated cell of the chemical sensor and/or under a dedicated operating condition of the chemical sensor or of a cell of the chemical sensor. The measurement tuple is compared to one or more reference tuples with each reference tuple representing an odour and/or gas and comprising a set of tuple elements and an identifier for the odour and/or gas represented by the reference tuple. One or more odour and/or gas identifiers are returned to the portable electronic device subject to a result of the comparison.

Claims

1. An odour and/or gas identification system, comprising a portable electronic device comprising a chemical sensor, wherein the sensor is sensitive to to different analytes and is adapted for supplying a measurement tuple, said measurement tuple comprising a set of tuple elements, and each tuple element of the set of tuple elements providing a value measured during at least one of an odour or gas measurement

wherein said measurement is made by a dedicated cell of the chemical sensor, or wherein said measurement is made under a dedicated operating condition of the chemical sensor or of a cell of the chemical sensor;

a database containing a set of reference tuples with each reference tuple representing at least one of an odour or gas and comprising

a set of tuple elements with each tuple element of the set of tuple elements providing a value characteristic sensible by the chemical sensor in the presence of at least one of the odour or gas represented by a corresponding reference tuple, and

an identifier for the odour and/or gas represented by the corresponding reference tuple;

an evaluation unit for comparing the measurement tuple to one or more reference tuples out of the set of reference tuples, and subject to a result of the comparison, returning at least one odour or gas identifier to the portable electronic device.

2. The system according to claim 1,

wherein the database and the evaluation unit are arranged remote from the portable electronic device,

wherein the electronic portable device is adapted to send the measurement tuple to the evaluation unit, and

wherein the evaluation unit is adapted to receive the measurement tuple from the electronic device and is adapted to send the at least one odour or gas identifiers identifier to the portable electronic device.

3. The system according to claim 1,

wherein the portable electronic device contains the evaluation unit,

wherein the database is arranged remote from the portable electronic device, and

wherein the electronic portable device is adapted to fetch one or more reference tuples from the database for comparing the measurement tuple to.

4. The system according to claim 1,

wherein the database and the evaluation unit are contained in the portable electronic device.

5. The system according to claim 1,

wherein the portable electronic device comprises a display for displaying the at least one odour or gas identifier.

6. The system according to claim 1,

wherein the chemical sensor comprises an array of sensor cells, and

wherein each sensor cell is sensitive to a different analyte.

7. The system according to claim 1,

wherein the portable electronic device comprises at least one of

a temperature sensor for compensating temperature dependent signal variations in a signal of the chemical sensor, and

a humidity sensor for compensating humidity dependent signal variations in a signal of the chemical sensor.

8. The system according to claim 1,

wherein the portable electronic device comprises an input unit for triggering at least one of an odour or gas measurement.

9. The system according to claim 1,

wherein the chemical sensor is adapted to continuously supply measurement tuples over time.

10. The system according to claim 1,

wherein the portable electronic device comprises a selector unit for selecting one or more of a multitude of databases for applying reference tuples from.

11. The system according to claim 1,

wherein the chemical sensor is adapted to supply the measurement tuple in combination with a chemical sensor identifier.

12. The system according to claim 1,

wherein the chemical sensor is adapted to supply the measurement tuple in combination with a time stamp.

13. The system according to claim 1,

wherein the chemical sensor is adapted to supply the measurement tuple in combination with location information indicating a current location of the portable electronic device.

14. The system according to claim 1,

wherein the portable electronic device is one of:

a mobile phone,

a handheld computer,

an electronic reader,

a tablet computer,

a game controller,

a pointing device,

a photo or a video camera, or

a computer peripheral.

15. A portable device for use in a an odour and/or gas identification system according to claim 1.

16. A method for identifying an odour and/or gas, comprising the steps of

Measuring at least one of an odour or gas with a portable electronic device comprising a chemical sensor, the chemical sensor being sensitive to different analytes;

supplying a measurement tuple comprising a set of tuple elements with each tuple element of the set of tuple elements providing a value measured during at least one of an odour or gas measurement

wherein said measurement is made by a dedicated cell of the chemical sensor, or wherein said measurement is made under a dedicated operating condition of the chemical sensor or of a cell of the chemical sensor;

comparing the measurement tuple to one or more reference tuples with each reference tuple representing at least one of an odour or gas and comprising

a set of tuple elements with each tuple element of the set of tuple elements providing a value characteristic sensible by the chemical sensor in the presence of the odour and/or gas represented by a corresponding reference tuple, and

an identifier for the odour or gas represented by the reference tuple; and

returning at least one odour or gas identifier to the portable electronic device subject to a result of the comparison.

17. The method according to claim 16, further comprising

comparing the measurement tuple to the one or more reference tuples by determining a deviation between measurement tuple elements and counterpart reference tuple elements, wherein a measurement tuple element and its counterpart reference tuple element are assigned to the same cell of the chemical sensor or are assigned to the same operating condition of the chemical sensor or of the cell of the chemical sensor,

wherein the identifier of a reference tuple compared to the measurement tuple is returned subject to the deviations determined.

18. The method according to claim 17, wherein the tuple elements to be compared comprise normalized values.

19. The method according to claim 17, further comprising

comparing each deviation to a threshold assigned,

wherein the identifier of a reference tuple compared to the measurement tuple is returned in case a number n of deviations is below the assigned thresholds.

20. A computer program medium comprising computer program code for implementing the following steps when executed on a processing unit:

comparing a measurement tuple received from a chemical sensor unit and comprising a set of tuple elements with each tuple element of the set of tuple elements providing a value measured by a dedicated cell of the chemical sensor and/or under a dedicated operating condition of the chemical sensor or of a cell of the chemical sensor during at least one of an odour or gas measurement, to one or more reference tuples with each reference tuple representing at least one of an odour or gas and comprising

a set of tuple elements with each tuple element of the set of tuple elements providing a value characteristic sensible by the chemical sensor in the presence of the odour or gas represented by the concerned reference tuple, and

an identifier for the odour or gas represented by the reference tuple; and

returning at least one odour or gas identifier subject to a result of the comparison.