Gas measurement system

Patent metadata

Field	Value
Publication number	US-9459151-B2
Application number	US-201314415323-A
Country	US
Kind code	B2
Filing date	Jul 17, 2013
Priority date	Jul 20, 2012
Publication date	Oct 4, 2016
Grant date	Oct 4, 2016

Abstract

A gas measurement system for measuring the concentration of gaseous and/or vaporous components of a gas mixture by means of a color change of at least one reaction substance on a reaction support unit, which is arranged in at least two light permeable channels in such a manner that the color change on the reaction substance can be detected at low expense on a large number of separate positions. The detecting unit which detects the color change can be designed as a digital camera with an electronic image converter or image sensor, and an imaging optics system (e.g., a lens system). Related systems, methods, apparatus, and articles are also described.

First claim

The invention claimed is:

1. An apparatus comprising:
a housing defining a slot;
a friction bearing within the slot configured to couple to a reaction support unit, the reaction support unit comprising at least two light permeable channels configured to receive at least one reaction substance, the at least one reaction substance changing color in presence of at least one particular gaseous or vaporous component;
a gas conveyance device configured to convey gas through at least one channel of the reaction support unit;
an optoelectronic detection device configured to detect a color change of the at least one reaction substance on the reaction support unit during and/or after the conveyance of the gas mixture, the color change being detected in the direction of flow of the gas mixture through the at least two channels in at least two separate positions, the optoelectronic detecting device comprising a digital camera having an image converter or an imaging optics system;
an evaluating device configured to evaluate the data detected by the optoelectronic detection device; and
a sensory feedback device configured to provide sensory feedback characterizing the data evaluated by the evaluating device.

2. An apparatus as in claim 1 , wherein the evaluating device comprises at least one data processor and a data storage unit.

3. An apparatus as in claim 2 , wherein the at least one data processor comprises a microcontroller.

4. An apparatus as in claim 3 , wherein the sensory feedback device comprises at least one of: a monitor, a light emitter, a lamp, an LED, and a signal tone generator.

5. An apparatus as in claim 1 , wherein the imaging optics system comprises at least one lens system.

6. An apparatus as in claim 1 , wherein the digital camera comprises at least one camera chip.

7. An apparatus as in claim 6 , wherein the camera chip comprises a CMOS camera chip.

8. An apparatus as in claim 1 , further comprising a transmission device configured to emit electromagnetic radiation through and/or onto the at least one reaction substance.

9. An apparatus as in claim 8 , wherein the transmission device comprises a light emitting diode (LED).

10. An apparatus as in claim 1 , wherein the housing forms the friction bearing for the reaction support unit.

11. An apparatus as in claim 1 , wherein the gas conveyance device comprises at least one pump.

12. An apparatus as in claim 11 , wherein the at least one pump comprises at least one suction pump.

13. An apparatus as in claim 1 , further comprises a gas connector configured to be moved between two positions, and which is fluidically connected to the gas conveyance device, so that, in a first position of the gas connector, no fluidic connection between the gas connector and one of the channels exists, and in a second position of the gas connector, a fluidic connection between the gas connector and one of the channels exists.

14. An apparatus as in claim 1 , further comprising a motor configured to move the reaction support unit within the slot so that the gas mixture can be conveyed separately through one of the at least two channels of the reaction support unit.

15. An apparatus as in claim 14 , wherein the motor comprises an electric motor.

16. An apparatus as in claim 15 , wherein the electric motor comprises a servomotor.

17. An apparatus as in claim 16 , further comprising a driving roller to mechanically couple the motor with the reaction support unit.

18. An apparatus as in claim 1 , further comprising the reaction support unit.

19. An apparatus as in claim 18 , wherein the reaction support unit comprises a supporting surface with a plurality of tubes disposed therein that delimit the channels, and wherein the at least one reaction substance is arranged within the tubes.

20. An apparatus as in claim 19 , wherein the supporting surface comprises a chip or a plate.

21. An apparatus as in claim 19 , wherein the tubes comprise glass tubes.

22. An apparatus as in claim 18 , wherein the reaction support unit further comprises an optical coding.

23. An apparatus as in claim 22 , wherein the coding is selected from a group consisting of: a bar code, a matrix coding, and an RFID chip.

24. An apparatus as in claim 18 , wherein the reaction support unit comprises two indicator pins that are configured to be moved between two positions with one indicator pin being associated with each tube, so that, in a first position of the indicator pin, a reaction substance that has not been exposed to the gas mixture within the associated tube can be indicated, and, in the second position of the indicator tube, a reaction substance that has been exposed to the gas mixture within the associated tube can be indicated.

25. An apparatus as in claim 19 , wherein the digital camera is arranged at a distance between 2 and 50 mm from the tubes which is detected by the digital camera.

26. An apparatus as in claim 25 , wherein the distance is between 15 and 20 mm.

27. A method comprising:
moving a reaction support unit through a gas measurement system, the reaction support unit having a plurality of channels each with at least one reaction substance;
conveying, using a gas conveyance device, a gas mixture through a single channel of the reaction support unit;
detecting, using a digital camera of an optoelectronic detection device, a color change of the at least one reaction substance during and/or after the conveyance of the gas mixture through the channel, wherein the color change is detected in the direction of flow of the gas mixture through the channel in at least two separate positions;
evaluating, using an evaluating device, data acquired by the optoelectronic detection device with regard to the color change; and
providing, using a sensory feedback device, sensory feedback regarding the evaluated data.

28. A method as in claim 27 , wherein the reaction support is moved using a motor.

29. A method as in claim 27 , wherein the digital camera exclusively detects colors comprising: red, green and blue.

30. A method as in claim 27 , wherein the digital camera detects the color change on a plurality of positions.

31. A method as in claim 30 , wherein the plurality of positions are more than 5 separate positions.

32. A method as in claim 31 , wherein the plurality of positions are more than 10 separate positions.

33. A method as in claim 32 , wherein the plurality of positions are more than 50 separate positions.

34. A method as in claim 32 , wherein the plurality of positions are more than 100 separate positions.

35. A method as in claim 32 , wherein the plurality of positions are more than 500 separate positions.

36. A method as in claim 27 , further comprising:
detecting, by the digital camera over several time periods, a plurality of changes in color of the at least one reaction substance; and
storing the detected plurality of changes in color in a data storage unit.

37. A method as in claim 27 , further comprising:
detecting, by the digital camera, the color change on the reaction substance on a fictitious line in the direction of flow of the gas mixture over the entire fictitious line.

38. A method as in claim 28 , further compr

Assignees

• Draeger Safety Ag & Co Kgaa

Inventors

• Hansmann Hans-Ullrich
• Mohrmann Andreas
• Tröllsch Arne
• Polzius Rainer

Classifications

• G01J3/0202

  Mechanical elements; Supports for optical elements · CPC title

• G01N21/783

  for analysing gases · CPC title

• G01J3/501 Primary

  Colorimeters using spectrally-selective light sources, e.g. LEDs · CPC title

• G01J3/0267

  Sample holders for colorimetry · CPC title

• G01J3/0289

  Field-of-view determination; Aiming or pointing of a spectrometer; Adjusting alignment; Encoding angular position; Size of measurement area; Position tracking · CPC title