CN204903054U - Draw pressure sensor - Google Patents
Draw pressure sensor Download PDFInfo
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- CN204903054U CN204903054U CN201520334558.3U CN201520334558U CN204903054U CN 204903054 U CN204903054 U CN 204903054U CN 201520334558 U CN201520334558 U CN 201520334558U CN 204903054 U CN204903054 U CN 204903054U
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- tension
- resistance strain
- pressure sensor
- compression sensor
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Abstract
The draw pressure sensor that this application provided, including the pressure sensing circuit, the pressure sensing circuit includes four resistance strain gauge that connect with the bridge mode, resistance strain gauge is the polycrystalline silicon foil gage. Polycrystalline silicon is taken up an official post a bit when receiving pressure, and the signal of telecommunication of conversion is all very stable, uses in the circuit that the bridge mode is connected, is close very much linear. The draw pressure sensor that the linearity is good has been realized providing.
Description
Technical field
The application relates to sensor technical field, more particularly, relates to a kind of tension-compression sensor.
Background technology
Pull pressure sensor two-wayly can experience strength, forms semiconductor strain pressure to the power that different directions produces at sheet surface, and traditional tension-compression sensor is all with silicon dioxide as resistance, and silicon dioxide transmits the poor linearity of electric signal.The homogeneity of its lifting surface area is good not, and the linearity importing the output electric signal of pressure into is bad.And under a lot of operating mode, require that the signal of tension-compression sensor is linear, the stressed average force that can be converted in any point, existing tension-compression sensor cannot realize, and cannot be used in high-precision device.
Therefore, how providing the tension-compression sensor that a kind of linearity is good, is current those skilled in the art's problem demanding prompt solution.
Utility model content
In view of this, this application provides a kind of tension-compression sensor, to realize the tension-compression sensor providing a kind of linearity good.
In order to achieve the above object, the application provides following technical scheme:
A kind of tension-compression sensor, comprise pressure sensor circuit, pressure sensor circuit comprises four resistance strain gages connected in bridge road mode, and resistance strain gage is polysilicon foil gauge.
Preferably, its inside is also provided with rectification circuit.
Preferably, rectification circuit is bridge rectifier circuit.
Preferably, its inside is also provided with the limiting and protecting device for limiting the elastic deformation of polysilicon foil gauge.
Preferably, resistance strain gage is thin rounded flakes.
The tension-compression sensor that the application provides, comprises pressure sensor circuit, and pressure sensor circuit comprises four resistance strain gages connected in bridge road mode, and resistance strain gage is polysilicon foil gauge.On polysilicon, any point is when being under pressure, and the electric signal of conversion is all highly stable, uses, closely linearly in the circuit that bridge road mode connects.Achieve the tension-compression sensor providing a kind of linearity good.
Accompanying drawing explanation
In order to be illustrated more clearly in the embodiment of the present application or technical scheme of the prior art, be briefly described to the accompanying drawing used required in embodiment or description of the prior art below, apparently, accompanying drawing in the following describes is only some embodiments of the application, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
Pressure sensor circuit structural representation in the tension-compression sensor that Fig. 1 provides for the application;
The structural representation of the tension-compression sensor that Fig. 2 provides for the application;
In upper figure: 1 be electrode input end, 2 be cathode output end, 3 be negative input, 4 be cathode output end, 5 be resistance strain gage, 6 be rectification circuit, 7 for limiting and protecting device.
Embodiment
This application provides a kind of tension-compression sensor, achieve the tension-compression sensor providing a kind of linearity good.
Below in conjunction with the accompanying drawing in the embodiment of the present application, carry out clear, complete description to the technical scheme in the embodiment of the present application, obviously, described embodiment is only some embodiments of the present application, instead of whole embodiments.Based on the embodiment of the application, those of ordinary skill in the art are not making the every other embodiment obtained under creative work prerequisite, all belong to the scope of the application's protection.
Pressure sensor circuit structural representation in the tension-compression sensor that Fig. 1 provides for the application; The structural representation of the tension-compression sensor that Fig. 2 provides for the application.
A kind of tension-compression sensor, comprise pressure sensor circuit, pressure sensor circuit comprises four resistance strain gages connected in bridge road mode, and resistance strain gage 5 is polysilicon foil gauge.The metering circuit that resistance strain type pressure sensor is made up of resistance strain gage and the sensor that elastic sensing element combines.When elastic sensing element is under pressure effect, generation strained, the resistance strain gage being pasted onto surface also can produce strain, shows as the change of resistance value.Elastomeric like this distortion is converted into the change of resistance strain gage resistance.Four resistance strain gages are connected according to bridge road mode, and two input ends apply certain magnitude of voltage, two output terminals export common mode voltage along with resistance on bridge road change increase or reduce.Employ the polysilicon foil gauge that the application provides, the corresponding relation of this change has the relation of approximately linear.Finding the corresponding relation of pressure change and output common mode change in voltage, just can obtain force value by measuring common mode voltage.When there being pressure, the resistance states of each brachium pontis all will change, and the voltage output of electric bridge can change.
In the application one specific embodiment, its inside is also provided with rectification circuit 6.Rectification circuit (rectifyingcircuit) is circuit AC energy being converted to direct current energy.
In the application one specific embodiment, rectification circuit is bridge rectifier circuit.Bridge rectifier circuit is more suitable for the operating mode of the application.
In the application one specific embodiment, its inside is also provided with limiting and protecting device 7.Limiting and protecting device 7 is physical protections, be in fact exactly shell fragment distortion time spacing up and down.The strength of our design maximum permission 20KG, when limiting by protected device more than shell fragment distortion during 20KG strength, has reached the effect of protection pressure transducer.
In the application one specific embodiment, resistance strain gage 5 is thin rounded flakes.Circle is more easily processed, and reduces costs.The response characteristic of thin slice counter stress is sharper.
In this instructions, each embodiment adopts the mode of going forward one by one to describe, and what each embodiment stressed is the difference with other embodiments, between each embodiment identical similar portion mutually see.
To the above-mentioned explanation of the disclosed embodiments, professional and technical personnel in the field are realized or uses the application.To be apparent for those skilled in the art to the multiple amendment of these embodiments, General Principle as defined herein when not departing from the spirit or scope of the application, can realize in other embodiments.Therefore, the application can not be restricted to these embodiments shown in this article, but will meet the widest scope consistent with principle disclosed herein and features of novelty.
Claims (5)
1. a tension-compression sensor, comprises pressure sensor circuit, it is characterized in that, described pressure sensor circuit comprises four resistance strain gages connected in bridge road mode, and described resistance strain gage (5) is polysilicon foil gauge.
2. tension-compression sensor as claimed in claim 1, it is characterized in that, its inside is also provided with rectification circuit (6).
3. tension-compression sensor as claimed in claim 2, it is characterized in that, described rectification circuit is bridge rectifier circuit.
4. tension-compression sensor as claimed in claim 3, it is characterized in that, its inside is also provided with the limiting and protecting device (7) for limiting the elastic deformation of described polysilicon foil gauge.
5. the tension-compression sensor as described in any one of claim 1-4, is characterized in that, described resistance strain gage (5) is thin rounded flakes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520334558.3U CN204903054U (en) | 2015-05-21 | 2015-05-21 | Draw pressure sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520334558.3U CN204903054U (en) | 2015-05-21 | 2015-05-21 | Draw pressure sensor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204903054U true CN204903054U (en) | 2015-12-23 |
Family
ID=54925222
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520334558.3U Active CN204903054U (en) | 2015-05-21 | 2015-05-21 | Draw pressure sensor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204903054U (en) |
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2015
- 2015-05-21 CN CN201520334558.3U patent/CN204903054U/en active Active
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|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |