Combined pressure/temperature sensor having centric temperature measurement

• US 7,954,994 B2
• Filed: 11/09/2006
• Issued: 06/07/2011
• Est. Priority Date: 11/29/2005
• Status: Active Grant

• Current Assignee: Robert Bosch GmbH
• Original Assignee: Robert Bosch GmbH
• Inventors: Engelhardt, Joerg, Warth, Stefan, Stoll, Oliver, Roesser, Christian, Ledermann, Markus
• Primary Examiner(s): Caputo; Lisa M
• Assistant Examiner(s): Jagan; Mirellys
• Application Number:
  US12/088,995
• Publication Number:
  US 20090041081A1
• Time in Patent Office: 1,671 Days
• Field of Search: 374/143, 374/208, 737/15, 737/56, 737/26, 737/08
• US Class Current: 374/143
• CPC Class Codes: G01L 19/0092 Pressure sensor associated with other sensors, e.g. for measuring acceleration or temperature G01L9/025, G01L9/045, G01L9/065, G01L9/085, G01L9/105, G01L9/125, G01L19/02, G01L19/04 take precedence; measuring two or more variable G01D21/02; temperature sensors with pressure compensation G01K1/26
• CPC Class Codes: G01L 19/147 Details about the mounting of the sensor to support or covering means
• CPC Class Codes: G01L 9/0055 bonded on a diaphragm

Abstract

A combined pressure and temperature sensor for recording the pressure and the temperature of a medium. The combined pressure and temperature sensor includes a sensor element in which at least one channel is developed for accommodating a temperature sensor and at least one channel is developed for recording a pressure. The at least one channel, for recording a pressure, opens out under a pressure sensor. The at least one channel for the temperature sensor runs centrically in the sensor element.

Claims

1. A combined pressure and temperature sensor, comprising:

a sensor element including a pressure sensor, at least one first channel adapted to accommodate a temperature sensor, and at least one second channel adaptable for recording a pressure, the at least one second channel opening below the pressure sensor;

wherein;

the at least one first channel adapted to accommodate the temperature sensor runs centrically in the sensor element; and

the pressure sensor;

is designed as a diaphragm; and

includes a centrically situated opening for a temperature sensor, which is enclosed by a dome-shaped extension piece that is connected by continuous material to the pressure sensor.

2. The combined pressure and temperature sensor as recited in claim 1, wherein the temperature sensor is enclosed at one medium-side end face of the sensor element by a centrically developed, dome-shaped extension piece of a cover.

3. The combined pressure and temperature sensor as recited in claim 1, wherein the at least one second channel includes a plurality of channels adapted for recording pressure.

4. The combined pressure and temperature sensor as recited in claim 1, wherein the pressure sensor includes a recess that runs annularly on a side facing a pressure chamber.

5. The combined pressure and temperature sensor as recited in claim 1, wherein the dome-shaped extension piece is developed by deep-drawing in a center of the diaphragm.

6. The combined pressure and temperature sensor as recited in claim 1 wherein the dome-shaped extension piece is able to be developed in different lengths that define an immersion depth of the temperature sensor into the medium.

7. The combined pressure and temperature sensor as recited in claim 1, wherein the temperature sensor is embedded in a heat conductive sealing compound on a side facing a medium.

8. The combined pressure and temperature sensor as recited in claim 1, wherein the temperature sensor is accommodated in a channel, developed as a bore of the sensor element or in a hollow space of an inner pipe of a multipart sensor element.

9. The combined pressure and temperature sensor as recited in claim 8, wherein the sensor element is a multipart sensor element component, the temperature sensor is accommodated in a hollow space of an inner pipe of the multipart sensor element component, and, between the inner pipe and an outer pipe of the multipart sensor element component, an annular pressure chamber is formed.

10. The combined pressure and temperature sensor as recited in claim 1, wherein the diaphragm include at least one strain gauge strip at a side facing away from the medium.

11. The combined pressure and temperature sensor as recited in claim 10, wherein the diaphragm is a ring diaphragm.