Invention Grant
- Patent Title: Device for measuring the pressure in a gas mixture
- Patent Title (中): 用于测量气体混合物中的压力的装置
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Application No.: US10578339Application Date: 2004-11-08
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Publication No.: US07922884B2Publication Date: 2011-04-12
- Inventor: Rainer Strohmaier , Martin Bauer , Bernhard Kamp
- Applicant: Rainer Strohmaier , Martin Bauer , Bernhard Kamp
- Applicant Address: DE Stuttgart
- Assignee: Robert Bosch GmbH
- Current Assignee: Robert Bosch GmbH
- Current Assignee Address: DE Stuttgart
- Agency: Kenyon & Kenyon LLP
- Priority: DE10352797 20031112
- International Application: PCT/EP2004/052865 WO 20041108
- International Announcement: WO2005/047841 WO 20050526
- Main IPC: G01N27/41
- IPC: G01N27/41

Abstract:
A device for measuring the pressure of a gas mixture composed of gas components has an amperometric sensor that works on the limiting current principle, having two electrodes connected to a direct voltage that are situated on a solid electrolyte, of which one electrode is covered by a diffusion barrier, and a measuring element for measuring the limiting current flowing via electrodes as a measure for the gas pressure. For the purpose of error-free measurement of the gas pressure in a gas mixture in which the concentration of the gas components fluctuates with time, means are provided which fix the mole fraction of a gas component, drawn upon for pressure measurement, that is present upstream of the diffusion barrier at a constant 100%, at least during the pressure measuring phase. In one preferred exemplary embodiment, these means include a storage volume that is adjacent to the diffusion barrier which is separated from the gas mixture by a diffusion path, and two electrodes, situated on the solid electrolyte, for pumping of the gas component into the storage volume.
Public/Granted literature
- US20070144904A1 Device for measuring the pressure in a gas mixture Public/Granted day:2007-06-28
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