Ultra low pressure drop flow sensor
First Claim
1. A fluid velocity sensor apparatus, comprising:
- a housing within a flow channel defined by a flow channel wall;
a sensor die within said housing for detecting a fluid property of a fluid flowing through a low resistance flow channel defined by a second flow channel wall configured within said housing wherein said low resistance flow channel produces a laminar flow of said fluid; and
at least one tap configured upon said housing facing into a direction of a flow stream of a fluid flowing through said flow channel, wherein said at least one tap leads to said low resistance flow channel, which directs said flow of fluid to said sensor die, such that said fluid after passing over said sensor die continues on a low resistance path to at least one other tap in order to determine a velocity pressure based on a difference between a pressure identified by said at least one tap and a pressure identified by said at least one other tap.
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Accused Products
Abstract
A fluid velocity sensor includes a sensor die for detecting a fluid property of a fluid flowing through a low resistance flow channel defined by a flow channel wall. One or more tap can be oriented facing into a direction of a flow stream of a fluid flowing through a flow channel defined by a channel wall, wherein the tap(s) leads to the low resistance flow channel, which directs the flow to the sensor die. At least one or more other taps can be located to face perpendicular to the direction of flow, such that the fluid after passing over the sensor die continues on a low resistance path to the other tap(s) facing perpendicular to the direction of flow in order to determine a velocity pressure based on a difference between pressures. The fluid velocity sensor can be arranged in a uni-directional or bi-directional fluid flow configuration.
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Citations
20 Claims
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1. A fluid velocity sensor apparatus, comprising:
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a housing within a flow channel defined by a flow channel wall; a sensor die within said housing for detecting a fluid property of a fluid flowing through a low resistance flow channel defined by a second flow channel wall configured within said housing wherein said low resistance flow channel produces a laminar flow of said fluid; and at least one tap configured upon said housing facing into a direction of a flow stream of a fluid flowing through said flow channel, wherein said at least one tap leads to said low resistance flow channel, which directs said flow of fluid to said sensor die, such that said fluid after passing over said sensor die continues on a low resistance path to at least one other tap in order to determine a velocity pressure based on a difference between a pressure identified by said at least one tap and a pressure identified by said at least one other tap. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A fluid velocity sensor apparatus, comprising:
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a housing within a flow channel defined by a flow channel wall; a sensor die within said housing for detecting a fluid property of a fluid flowing through a low resistance flow channel defined by a second flow channel wall wherein said low resistance flow channel produces a laminar flow of said fluid; at least one tap configured upon said housing facing into a direction of a flow stream of a fluid flowing through said flow channel, wherein said at least one tap leads to said low resistance flow channel, which directs said flow of fluid to said sensor die, such that said fluid after passing over said sensor die continues on a low resistance path to at least one other tap in order to determine a velocity pressure based on a difference between a pressure identified by said at least one tap and a pressure identified by said at least one other tap; and at least one flow straightener configured upon said housing, wherein said flow straightener promotes a bi-directional flow of fluid through said flow channel. - View Dependent Claims (8, 9, 10, 11)
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12. A fluid velocity sensor apparatus, comprising:
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a housing within a flow channel defined by a flow channel wall; a sensor die within said housing for detecting a fluid property of a fluid flowing through a low resistance flow channel defined by a second flow channel wall wherein said low resistance flow channel produces a laminar flow of said fluid; and at least one tap configured upon said housing facing into a direction of a flow stream of a fluid flowing through said flow channel defined by a flow channel wall, wherein said at least one tap leads to said low resistance flow channel, which directs said flow of fluid to said sensor die, such that said fluid after passing over said sensor die continues on a low resistance path to at least one other tap that faces opposite said direction of flow in order to determine a velocity of said fluid. - View Dependent Claims (13, 14, 15, 16)
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17. A method of forming a fluid velocity sensor apparatus, comprising:
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providing a housing within a flow channel defined by a flow channel wall; providing a sensor die within said housing for detecting a fluid property of a fluid flowing through a low resistance flow channel defined by a second flow channel wall wherein said low resistance flow channel produces a laminar flow of said fluid; and locating at least one tap configured upon said housing facing into a direction of a flow stream of a fluid flowing through said flow channel defined by a flow channel wall, wherein said at least one tap leads to said low resistance flow channel, which directs said flow of fluid to said sensor die, such that said fluid after passing over said sensor die continues on a low resistance path to at least one other tap in order to determine a velocity pressure based on a difference between a pressure identified by said at least one tap and a pressure identified by said at least one other tap. - View Dependent Claims (18, 19, 20)
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Specification