CN221350338U - Resistance strain gauge with temperature measuring resistor for pressure sensor - Google Patents
Resistance strain gauge with temperature measuring resistor for pressure sensor Download PDFInfo
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- CN221350338U CN221350338U CN202323261044.3U CN202323261044U CN221350338U CN 221350338 U CN221350338 U CN 221350338U CN 202323261044 U CN202323261044 U CN 202323261044U CN 221350338 U CN221350338 U CN 221350338U
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- Prior art keywords
- strain gauge
- resistance
- temperature
- pressure sensor
- resistance strain
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- 238000005259 measurement Methods 0.000 abstract 1
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 description 6
- 239000000758 substrate Substances 0.000 description 4
- 238000009529 body temperature measurement Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 229910052697 platinum Inorganic materials 0.000 description 3
- 238000009530 blood pressure measurement Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000008542 thermal sensitivity Effects 0.000 description 1
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Abstract
The utility model relates to the field of resistance strain gauges, in particular to a resistance strain gauge with a temperature measuring resistor for a pressure sensor. And a zigzag temperature measuring resistor strip and a temperature measuring resistor strip electrode are arranged on the outer edge of the strain gauge sensitive grid, when the measured medium acts on the pressure sensing diaphragm of the pressure sensor, the pressure sensing diaphragm changes along with the temperature change of the measured medium, the strain gauge is stuck on the pressure sensing diaphragm, and the temperature of the temperature measuring resistor strip and the temperature of the strain resistor strip on the strain gauge change along with the temperature change of the pressure sensing diaphragm. The temperature of the temperature measuring resistance strip reflects the temperature of the strain resistance strip, and accurate measurement of the temperature of the strain resistance strip of the resistance strain gauge for the pressure sensor is realized. The temperature detected by the temperature measuring resistor strip is connected to the digital processing circuit of the pressure sensor, so that the digital compensation of temperature errors of the pressure sensor can be performed.
Description
Technical Field
The utility model relates to the field of resistance strain gauges, in particular to a resistance strain gauge with a temperature measuring resistor for a pressure sensor.
Background
Currently, known resistance strain gauges for pressure sensors consist of four paper-folded resistance strips. In the R/3 circle of the radius R of the sensitive grid, two semicircular broken lines of resistance strips detect tangential strain; in the rings of the radius R and R/. Cndot.3 of the sensor grid, two radial fold lines of the resistor strip detect radial strain. And the resistor strips for detecting radial strain and tangential strain are respectively connected with the opposite arms of the Wheatstone bridge to realize pressure measurement. The temperature error of the pressure sensor manufactured by the strain gauge is zero temperature error compensation by connecting a thermistor in series on a bridge arm, and thermal sensitivity temperature error compensation is realized by connecting the thermistor in series on the power supply end of the bridge.
With the development of digital technology, sensor temperature error compensation begins to replace the traditional compensation method with a thermistor by digital compensation. The digital compensation has the characteristics of high production efficiency, high compensation precision and the like, but the digital compensation needs to measure the temperature of a sensitive element of the sensor. The temperature measurement can be realized by installing a temperature measuring platinum resistor or diode near the sensitive element. However, for the resistance strain gauge for the pressure sensor, the resistance strain gauge is adhered to the pressure sensing diaphragm of the pressure sensor, a distance is kept between the temperature measuring platinum resistor or the temperature measuring diode and the strain resistor strip on the pressure sensing diaphragm of the pressure sensor, the temperature of the strain resistor strip on the pressure sensing diaphragm of the pressure sensor cannot be accurately measured by the temperature measuring platinum resistor or the temperature measuring diode, and the cost of the pressure sensor is increased.
Disclosure of Invention
The utility model aims to provide a resistance strain gauge structure with a temperature measuring resistor for a pressure sensor, which can accurately realize temperature measurement of strain resistance of the resistance strain gauge for the pressure sensor.
The utility model aims at realizing that a zigzag temperature measuring resistor strip with a temperature coefficient is arranged at the outer edge of a sensitive grid of a resistance strain gauge for a pressure sensor. In the use process of the resistance strain gauge for the pressure sensor, the pasting position of the broken-line-shaped temperature measuring resistance strip is on the clamped edge of the pressure sensing diaphragm of the pressure sensor, and electrodes at two ends of the temperature measuring resistance strip are connected to a digital compensation circuit through leads to measure the temperature of the strain resistance of the pressure sensor.
The strain gauge with the temperature measuring resistor can be stuck on the pressure sensing diaphragm or can be directly manufactured on the pressure sensing diaphragm.
The zigzag resistive strips on the strain gauge can be a plurality of radial resistive strips connected in series, a plurality of circular arc resistive strips connected in series, or a plurality of other linear resistive strips connected in series.
The zigzag resistive strips on the strain gauges can be a plurality of lines connected in series.
For ease of use and increased reliability, a plurality of meander-line resistive tracks may be provided on the strain gage.
The piezoresistor strip on the resistance strain gauge can be either open bridge or closed bridge.
When the measured medium acts on the pressure sensing diaphragm of the pressure sensor, the pressure sensing diaphragm changes along with the temperature change of the measured medium, the temperature of the temperature measuring resistor strip and the temperature of the variable resistor strip which are stuck on the pressure sensing diaphragm all change along with the temperature change of the pressure sensing diaphragm, and the temperature of the temperature measuring resistor strip reflects the temperature of the variable resistor strip. The purpose of accurate temperature measurement of the resistance strain gauge for the pressure sensor is achieved.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings that are required to be used in the embodiments or the description of the prior art will be briefly described, and it is obvious that the drawings in the following description are only some embodiments of the present application, and other drawings may be obtained according to the drawings without inventive effort for a person of ordinary skill.
Fig. 1 is a structural diagram of a conventional resistance strain gauge for a pressure sensor.
Fig. 2 is a structural diagram of a resistance strain gauge for a pressure sensor with a temperature measuring resistor.
In the figure: 1. the strain gauge comprises a resistance strain gauge substrate, a radial strain resistance strip, a tangential strain resistance strip, a strain resistance strip electrode, a temperature measuring resistance strip electrode and a temperature measuring resistance strip electrode.
Detailed Description
In fig. 1, a conventional resistance strain gauge for a pressure sensor is provided with four polygonal resistance strips (2, 3) on a substrate (1) of the resistance strain gauge for a pressure sensor. Detecting tangential strain by using two semicircular broken lines of resistance strips (3) in an R/[ V ] 3 circle of the radius R of the sensitive grid; radial strain is detected by the resistive tracks (2) of two radial fold lines within the circle of the grating radii R and R/. Cndot.3. The two resistor strips (2) for detecting radial strain and the two resistor strips (3) for detecting tangential strain are respectively connected to opposite arms of the Wheatstone bridge through strain resistor strip electrodes (4) to realize pressure measurement.
In fig. 2, a temperature measuring resistor strip (5) having a zigzag shape with a temperature coefficient is provided on the outer edge of a sensitive grid on a pressure sensor resistance strain gauge substrate (1), and temperature measuring resistor strip electrodes (6) for connecting with an external circuit are provided on both ends of the temperature measuring resistor strip, in addition to two zigzag resistance strips (2) for detecting radial strain, two tangential resistance strips (3) for detecting tangential strain, and a strain resistance strip electrode (4) are provided on the pressure sensor resistance strain gauge substrate (1).
In the use process of the resistance strain gauge for the pressure sensor, the resistance strain gauge for the pressure sensor with a temperature measuring resistor is stuck on a pressure sensing diaphragm, and temperature measuring resistor strip electrodes (6) at two ends of a temperature measuring resistor strip (5) are connected into a temperature measuring circuit. When the measured medium acts on the pressure sensing diaphragm, the pressure sensing diaphragm changes along with the temperature change of the measured medium, the temperatures of the strain resistance strips (2) and (3) and the temperature measuring resistance strip (5) stuck on the pressure sensing diaphragm are consistent with the temperature of the pressure sensing diaphragm, and the temperature measuring resistance strip (5) achieves the purpose of accurately measuring the temperature of the strain resistance strips (2) and (3) of the resistance strain gauge for the pressure sensor.
Claims (6)
1. A resistance strain gauge for a pressure sensor with a temperature measuring resistor is characterized in that: and a broken-line-shaped resistor strip with temperature coefficients and two lead electrodes at two ends is arranged at the outer edge of a sensitive grid of the resistance strain gauge for the pressure sensor, wherein the strain gauge is stuck to the clamped edge of a pressure sensing diaphragm of the pressure sensor.
2. The resistance strain gauge of claim 1, wherein: the resistance strain gauge can be stuck on the pressure sensing diaphragm of the pressure sensor, and can also be directly manufactured on the pressure sensing diaphragm of the pressure sensor.
3. The resistance strain gauge of claim 1, wherein: the zigzag resistive strips on the resistance strain gauge can be a plurality of radial resistive strips connected in series, a plurality of circular arc resistive strips connected in series, or a plurality of other linear resistive strips connected in series.
4. The resistance strain gauge of claim 1, wherein: the zigzag resistance strips on the resistance strain gauge can be connected in series with various strips.
5. The resistance strain gauge of claim 1, wherein: the zigzag resistance strips on the resistance strain gauge may be provided in one or a plurality.
6. The resistance strain gauge of claim 1, wherein: the 4 pressure sensitive resistance strips of the resistance strain gauge can be closed bridge or opened bridge.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202323261044.3U CN221350338U (en) | 2023-11-30 | 2023-11-30 | Resistance strain gauge with temperature measuring resistor for pressure sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202323261044.3U CN221350338U (en) | 2023-11-30 | 2023-11-30 | Resistance strain gauge with temperature measuring resistor for pressure sensor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN221350338U true CN221350338U (en) | 2024-07-16 |
Family
ID=91843927
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202323261044.3U Active CN221350338U (en) | 2023-11-30 | 2023-11-30 | Resistance strain gauge with temperature measuring resistor for pressure sensor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN221350338U (en) |
-
2023
- 2023-11-30 CN CN202323261044.3U patent/CN221350338U/en active Active
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