CN206019676U - A kind of resistance sensor for being provided with Wheatstone bridge - Google Patents
A kind of resistance sensor for being provided with Wheatstone bridge Download PDFInfo
- Publication number
- CN206019676U CN206019676U CN201621065614.9U CN201621065614U CN206019676U CN 206019676 U CN206019676 U CN 206019676U CN 201621065614 U CN201621065614 U CN 201621065614U CN 206019676 U CN206019676 U CN 206019676U
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- Prior art keywords
- resistance
- sensor
- measuring
- resistance sensor
- wheatstone bridge
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Abstract
This utility model is applied to resistance-type field of sensing technologies, there is provided a kind of resistance sensor for being provided with Wheatstone bridge, the Wheatstone bridge include the first measuring resistance R1, the second measuring resistance R2, critesistor R3Resistance R with resistance sensort, also include power supply U；First measuring resistance R1With the critesistor R3Tie point, second measuring resistance R is formed after series connection2Resistance R with the resistance sensortThe second branch road is formed after series connection, and the tie point is with second branch circuit parallel connection in power supply U two ends；Also, critesistor R bridge balance is met between above-mentioned resistance, i.e.,3Resistance R with resistance sensortResistance when changing with the change of temperature, the ratio of satisfaction is equal to the resistance sensor that this utility model provides and overcomes impact of the temperature change to measuring.
Description
Technical field
This utility model belongs to resistance-type field of sensing technologies, more particularly to a kind of resistance-type for being provided with Wheatstone bridge is passed
Sensor.
Background technology
There are a lot of resistance sensors, such as pressure transducer, combustible gas sensor etc. on the market now.Wherein, MP-
4 combustible gas sensors, using multilayer thick film manufacturing process, make heater respectively on the two sides of miniature Al2O3 ceramic substrates
With Metal Oxide Semiconductor Gas Sensing layer, it is encapsulated in metal shell.Sense in the presence of there are detected gas in surrounding air
Device electrical conductivity changes.The concentration of the gas is higher, and the electrical conductivity of sensor is higher, can be by this using simple circuit
The change for planting electrical conductivity is converted to the output signal corresponding with gas concentration.And electrical conductivity also can change with temperature, temperature
Degree change makes the electrical conductivity of resistance sensor change, and then can affect the certainty of measurement of resistance sensor.
Utility model content
Technical problem to be solved in the utility model is to provide a kind of resistance sensor for being provided with Wheatstone bridge,
It is intended to the impact for overcoming temperature change to measure the resistance sensor.
This utility model provides a kind of resistance sensor for being provided with Wheatstone bridge, and the Wheatstone bridge includes the
One measuring resistance R1, the second measuring resistance R2, critesistor R3Resistance R with resistance sensort, also include power supply U；
First measuring resistance R1With the critesistor R3Tie point, second measuring resistance is formed after series connection
R2Resistance R with the resistance sensortThe second branch road, the tie point and second branch circuit parallel connection is formed after series connection
In power supply U two ends；
Bridge balance is met between above-mentioned resistance, i.e.,Also, critesistor R3Resistance with resistance sensor
RtResistance when changing with the change of temperature, meetRatio be equal to
Further, the Wheatstone bridge also includes voltmeter, and first standard electric is accessed in described voltmeter one end
Resistance R1With the critesistor R3Between, the other end accesses second measuring resistance R2Resistance with the resistance sensor
RtBetween, the voltmeter is used for the output voltage U for surveying the Wheatstone bridget.
Further, first measuring resistance and the second measuring resistance are copper-manganese resistance.
Compared with prior art, beneficial effect is this utility model：One kind that this utility model is provided is provided with favour stone
The resistance sensor of electric bridge, is provided with Wheatstone bridge in the resistance sensor, in an initial condition, four of electric bridge
Bridge balance is met between bridge arm, i.e.,Also, when the temperature change of resistance sensor local environment, temperature-sensitive electricity
Resistance R3Resistance R with resistance sensortResistance change with the change of temperature, andRatio still equal toI.e. still
Meet bridge balance, overcome the impact that temperature change is measured to resistance sensor.
Description of the drawings
Fig. 1 is the circuit diagram of the Wheatstone bridge in the resistance sensor that this utility model embodiment is provided.
Specific embodiment
In order that the purpose of this utility model, technical scheme and advantage become more apparent, below in conjunction with accompanying drawing and enforcement
Example, is further elaborated to this utility model.It should be appreciated that specific embodiment described herein is only in order to explaining
This utility model, is not used to limit this utility model.
Of the present utility model mainly realize that thought is：In order to overcome temperature change to produce the electrical conductivity of resistance sensor
Affect, and impact is produced on the measurement of the resistance sensor further, this utility model is provided with favour in resistance sensor
Stone electric bridge, makes in original state, and the favour stone suspension bridge meets bridge balance, also, the change with temperature, the favour
Stone electric bridge still meets bridge balance, so as to overcome impact of the temperature change to the resistivity of the resistance sensor, from
And overcome the impact of the measurement to the resistance sensor.
Lower mask body introduces this resistance sensor for being provided with Wheatstone bridge, as shown in figure 1, the Wheatstone bridge
Including the first measuring resistance R1, the second measuring resistance R2, critesistor R3Resistance R with resistance sensort, also include power supply U
With voltage Table V；
Further, first measuring resistance and the second measuring resistance are copper-manganese resistance.
First measuring resistance R1With the critesistor R3Tie point, second measuring resistance is formed after series connection
R2Resistance R with the resistance sensortThe second branch road, the tie point and second branch circuit parallel connection is formed after series connection
In power supply U two ends；Access first measuring resistance R in described voltage Table V one end1With the critesistor R3Between, another termination
Enter second measuring resistance R2Resistance R with the resistance sensortBetween, the voltage Table V is used for surveying the favour stone
The output voltage U of electric bridget.
The output voltage U of nonequilibrium bridge bridgetFor：
The measuring principle of the resistance sensor for being provided with Wheatstone bridge is specially：Electricity according to resistance sensor
Resistance RtTo realize the measurement of resistance sensor, specifically, (ratio in the presence of resistance sensor element to be measured
Such as, when the resistance sensor is used for surveying certain combustable gas concentration in surrounding air, and in surrounding air certain fuel gas
In the presence of), using the resistance R for obtainingtValue is converted to corresponding value (being converted to certain combustable gas concentration value) to be measured.More
Specifically, when the element (being certain combustable gas concentration value) changes, resistance RtCan also change；And UtWith Rt
Change and change, therefore, by UtValue can determine RtValue, and then be converted to resistance sensor value to be measured
(being certain combustable gas concentration value).
And (do not exist in secondary element to be measured, and the resistance-type is passed when the resistance sensor is in original state
When sensor place ambient temperature is constant), meet the output voltage U of Wheatstone bridget=0, i.e., electric bridge is met between above-mentioned resistance
Balance,
I.e.：
I.e.：
When ambient temperature changes, critesistor R3Resistance R with resistance sensortResistance can be with the liter of temperature
High and raise；As critesistor R3Resistance R with resistance sensortResistance when changing with the change of temperature, meetRatio still equal toEven if i.e. temperature change, the Wheatstone bridge still meets bridge balance, overcomes temperature to surveying
The impact that amount is brought.
Below as a example by surveying certain combustable gas concentration extraneous, the measuring principle of the resistance sensor is illustrated：
When extraneous combustable gas concentration changes, resistance R of the resistance sensortChange, and UtWith Rt's
Change and change；Therefore, by UtValue can determine resistance value Rt, and by resistance value RtBe converted to corresponding with gas concentration
Output signal, and then obtain combustable gas concentration.
The equation is obtained by the conversion of (1) formula；Can be determined according to the equation corresponding when extraneous combustable gas concentration is certain value
Resistance value Rt, and then obtain combustable gas concentration.
A kind of resistance sensor for being provided with Wheatstone bridge that this utility model is provided, in the resistance sensor
Wheatstone bridge is provided with, and in an initial condition, bridge balance is met between four bridge arms of electric bridge, i.e.,Also, work as
During the temperature change of resistance sensor local environment, critesistor R3Resistance R with resistance sensortResistance with temperature
The change of degree and change,Ratio constant, i.e., still meet bridge balance, overcome temperature change to resistance sensor measure
Impact, measure more accurate；And, it is achieved that resistance measurement is converted into voltage measurement, practical.
Preferred embodiment of the present utility model is the foregoing is only, not in order to limit this utility model, all at this
Any modification, equivalent and improvement that is made within the spirit and principle of utility model etc., should be included in this utility model
Protection domain within.
Claims (3)
1. a kind of resistance sensor for being provided with Wheatstone bridge, it is characterised in that the Wheatstone bridge includes the first standard
Resistance R1, the second measuring resistance R2, critesistor R3Resistance R with resistance sensort, also include power supply U；
First measuring resistance R1With the critesistor R3Tie point, second measuring resistance R is formed after series connection2With
The resistance R of the resistance sensortThe second branch road is formed after series connection, and the tie point is with second branch circuit parallel connection in electricity
Source U two ends；
Bridge balance is met between above-mentioned resistance, i.e.,Also, critesistor R3Resistance R with resistance sensort's
When resistance changes with the change of temperature, meetRatio be equal to
2. resistance sensor as claimed in claim 1, it is characterised in that the Wheatstone bridge also includes voltmeter, institute
State voltmeter one end and access first measuring resistance R1With the critesistor R3Between, the other end accesses second standard
Resistance R2Resistance R with the resistance sensortBetween, the voltmeter is used for the output voltage for surveying the Wheatstone bridge
Ut.
3. resistance sensor as claimed in claim 1, it is characterised in that first measuring resistance and the second measuring resistance
For copper-manganese resistance.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621065614.9U CN206019676U (en) | 2016-09-20 | 2016-09-20 | A kind of resistance sensor for being provided with Wheatstone bridge |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621065614.9U CN206019676U (en) | 2016-09-20 | 2016-09-20 | A kind of resistance sensor for being provided with Wheatstone bridge |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206019676U true CN206019676U (en) | 2017-03-15 |
Family
ID=58261137
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201621065614.9U Expired - Fee Related CN206019676U (en) | 2016-09-20 | 2016-09-20 | A kind of resistance sensor for being provided with Wheatstone bridge |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206019676U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108088875A (en) * | 2017-12-22 | 2018-05-29 | 辽宁师范大学 | Nonequilibrium bridge formula alcohol gas sensor based on single ZnO micro wires |
| CN113091940A (en) * | 2021-04-09 | 2021-07-09 | 东南大学 | Heating and temperature measuring integrated wind speed and direction sensor |
-
2016
- 2016-09-20 CN CN201621065614.9U patent/CN206019676U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108088875A (en) * | 2017-12-22 | 2018-05-29 | 辽宁师范大学 | Nonequilibrium bridge formula alcohol gas sensor based on single ZnO micro wires |
| CN113091940A (en) * | 2021-04-09 | 2021-07-09 | 东南大学 | Heating and temperature measuring integrated wind speed and direction sensor |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20170315 Termination date: 20200920 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |