Microsensor housing
AssigneeHoneywell International Inc.
InventorUlrich Bonne
Life of this patent
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Abstract
A microsensor housing having a structure with at least one inlet at one end and a thermal property sensor at the other end. Situated between the inlet and the sensor is a convection shield. Sampled fluid is taken in the inlet from a channel carrying the fluid to be sampled. The convection flow lines of the fluid are barred by the convection shield. The fluid is diffused into a cavity between the shield and sensor. The sensor detects a thermal property of the diffused fluid. One preferred shield has holes about its perimeter with a solid center part of the shield covering at a distance the sensor. The channel carrying the fluid may have screens to reduce turbulence noise and to aid in fluid transport to and from the sensor housing.
Claims11
A sensor and sensor housing assembly comprising:
- means for sensing at least one thermal property of a fluid, said means for sensing including a heating element and a sensing element arranged in a microbridge configuration;
- means for shielding, proximate to said means for sensing, for shielding said means for sensing from convection of the fluid that detrimentally affects an accuracy of the sensing the at least one thermal property of the fluid, said means for shielding including a plurality of concentrically spaced holes;
- and
- means for reducing velocity and conveying a portion of fluid to said means for shielding.
Dependencies are inferred from the claim text.