Tunable pressure transducer assembly

Patent metadata

Field	Value
Publication number	US-9752948-B2
Application number	US-201615252523-A
Country	US
Kind code	B2
Filing date	Aug 31, 2016
Priority date	Sep 10, 2010
Publication date	Sep 5, 2017
Grant date	Sep 5, 2017

Abstract

A tunable pressure transducer assembly that comprises a sensing element disposed within a housing, wherein the sensing element is adapted to output a signal substantially indicative of an applied pressure, and a filter assembly also disposed within the housing. In one example embodiment, a method includes receiving, at a filter assembly having a tube, a cap and a cavity defined by a housing, a pressure, wherein the cap is positioned to set a predetermined volume of the cavity and the tube is associated with an application of the pressure to the cavity, wherein the pressure includes a static pressure component and a dynamic pressure component; filtering, by the tube and the cavity, at least a portion of the dynamic pressure component of the pressure to obtain a filtered pressure; outputting, from the filter assembly, the filtered pressure; and wherein the filtered pressure is used to determine the static pressure component of the pressure.

First claim

We claim:

1. A filter assembly comprising:
a housing defining a channel and an internal cavity, wherein the channel is in communication with the internal cavity;
a slidable cap disposed within at least a portion of the internal cavity of the housing;
a slidable tube disposed within at least a portion of the channel and attached to the cap, wherein the tube and the cap are slideably disposed within the housing;
wherein the slidable tube and the slidable cap form an adjustable low pass mechanical filter configured to receive and filter an input pressure to provide a filtered pressure.

2. The filter assembly of claim 1 , wherein a position of the slidable tube and the slidable cap of the adjustable low pass mechanical filter is configured to control a dampening property of the filter assembly.

3. The filter assembly of claim 2 , wherein the dampening property comprises attenuation of one or more frequencies.

4. The filter assembly of claim 1 , wherein the slidable tube is detachably attached to the slidable cap.

5. The filter assembly of claim 1 , further comprising:
a sensing element disposed in the housing and operationally coupled to the internal cavity, wherein the sensing element is configured to:
receive the filtered pressure;
measure the filtered pressure to obtain a filtered pressure signal; and
output the filtered pressure signal.

6. The filter assembly of claim 5 , wherein the filtered pressure signal corresponds to a static pressure component of the input pressure.

7. The filter assembly of claim 5 , wherein the sensing element comprises a piezoresistive sensing element.

8. The filter assembly of claim 1 , wherein the slidable cap comprises a first inner width and the slidable tube comprises a second inner width, wherein the first inner width is greater than the second inner width.

9. The filter assembly of claim 1 , wherein a length of the slidable tube is configured to manipulate a filter property of the filter assembly.

10. The filter assembly of claim 1 , wherein a volume of the internal cavity is configured by a position of the slidable cap to control a dampening property of the filter assembly.

11. A method, comprising:
receiving, at a first end of a filter assembly, an input pressure, wherein the filter assembly comprises:
a housing defining a channel and an internal cavity, wherein the channel is in communication with the internal cavity;
a slidable cap disposed within at least a portion of the internal cavity of the housing;
a slidable tube disposed within at least a portion of the channel and attached to the cap, wherein the tube and the cap are slideably disposed within the housing;

filtering, by the filter assembly, at least a portion of the input pressure to obtain a filtered pressure; and
outputting, from the filter assembly, the filtered pressure.

12. The method of claim 11 , further comprising positioning the slidable tube and the slidable cap of the of the filter assembly to control a dampening property of the filter assembly.

13. The method of claim 12 , wherein the dampening property comprises dampening one or more frequencies associated with the input pressure.

14. The method of claim 11 , further comprising:
receiving, with a sensing element disposed in the housing and operationally coupled to the internal cavity, the filtered pressure;
measuring, with the sensing element, the filtered pressure to obtain a filtered pressure signal; and
outputting the filtered pressure signal.

15. The method of claim 11 , wherein the sensing element comprises a piezoresistive sensing element.

16. The method of claim 14 , wherein the filtered pressure signal corresponds to a static pressure component of the input pressure.

17. The method of claim 11 , further comprising:
configuring a first inner width of the slidable cap; and
configuring a second inner width of the slidable tube, wherein the first inner width is greater than the second inner width.

18. The method of claim 11 , further comprising:
manipulating a filter property of the filter assembly by configuring a length of the slidable tube.

19. The method of claim 11 , further comprising:
positioning the slidable cap within the internal cavity to configure a volume of the internal cavity, wherein the volume controls a dampening property of the filter assembly.

20. The method of claim 19 , wherein the positioning is determined, at least in part, by a viscosity associated with a pressure media in communication with the filter assembly.

Assignees

• Kulite Semiconductor Products Inc

Inventors

• Derosa Louis
• Gardner Robert

Classifications

• Y10T29/49764

  with testing or indicating · CPC title

• G01L19/0609 Primary

  Pressure pulsation damping arrangements · CPC title

• G01L19/0007

  Fluidic connecting means · CPC title