Invention Grant
US5863803A Method and apparatus for modulating a gas sample for a calorimetric gas
sensor
失效
用于调制量热气体传感器的气体样品的方法和装置
- Patent Title: Method and apparatus for modulating a gas sample for a calorimetric gas sensor
- Patent Title (中): 用于调制量热气体传感器的气体样品的方法和装置
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Application No.: US772661Application Date: 1996-12-20
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Publication No.: US5863803APublication Date: 1999-01-26
- Inventor: Margherita Zanini-Fisher , Jacobus H. Visser , E. M. Logothetis
- Applicant: Margherita Zanini-Fisher , Jacobus H. Visser , E. M. Logothetis
- Applicant Address: MI Dearborn
- Assignee: Ford Global Technologies, Inc.
- Current Assignee: Ford Global Technologies, Inc.
- Current Assignee Address: MI Dearborn
- Main IPC: G01N1/00
- IPC: G01N1/00 ; B81B1/00 ; G01N1/22 ; G01N27/16 ; G01N33/00 ; G01N25/32
Abstract:
A method and apparatus is provided for modulating flux of combustibles reacting with oxygen impinging on a calorimetric gas sensor. The method includes the steps of enclosing a sensing element and a reference element of a calorimetric gas sensor with an apparatus having at least one aperture to allow combustibles to enter and impinge on the sensing element and reference element, periodically restricting the aperture of the apparatus to modulate the flux of combustibles entering at a predetermined frequency to produce an AC output signal from the calorimetric gas sensor, and measuring the sensor output at the frequency at which the aperture is restricted.
Public/Granted literature
- US5337679A Pallet constructed of sheet material Public/Granted day:1994-08-16
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