CN206300711U - A kind of four angular measurement electronic scale circuits of half-bridge sensor series four - Google Patents
A kind of four angular measurement electronic scale circuits of half-bridge sensor series four Download PDFInfo
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- CN206300711U CN206300711U CN201621463952.8U CN201621463952U CN206300711U CN 206300711 U CN206300711 U CN 206300711U CN 201621463952 U CN201621463952 U CN 201621463952U CN 206300711 U CN206300711 U CN 206300711U
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- pressure sensor
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- resistance
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- 238000005259 measurement Methods 0.000 title claims abstract description 33
- 238000004519 manufacturing process Methods 0.000 abstract description 4
- 238000005303 weighing Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 1
- 239000004575 stone Substances 0.000 description 1
Abstract
The utility model discloses a kind of four angular measurement electronic scale circuits of half-bridge sensor series four, including by four pressure sensor S1 of resistance-type, pressure sensor S4, pressure sensor S3 and pressure sensor S2 are sequentially connected in series the electric bridge with power supply contact and six signal measuring points to be formed, not only the electric bridge that four pressure sensors are constituted is measured, the output relation between four pressure sensors is also measured respectively, obtain four respective outputs of pressure sensor, demarcated by corner, reduce the requirement that pressure sensor selects pairing, improve production first-pass yield, it is easy to maintenance, four-point electronic scale corner unbalance loading performance is greatly improved, and the precision of measurement is improve more than ten times.
Description
Technical field
The utility model is related to a kind of weighing apparatus, particularly a kind of four-point weighing electronic scale.
Background technology
It is that a pressure sensor is respectively set at four angles of electronic scale to be weighed using half-bridge four-point, by favour stone
Balanced bridge method calculated weight.Current four-point weighing electronic scale circuit is as shown in figure 1, this circuit cannot measure single pressure
Force snesor is exported, and four pressure sensors are necessarily exported unanimously, could meet four pin unbalance loadings, is passed to meet four pressure
Sensor output is consistent, generally uses and selects matching method, and pressure sensor has 20% output difference, adds and is selected by single
Means are limited, install fixed generation difference and cost reason, and precision generally can only achieve 1/200, and production first-pass yield is not high, dimension
Repair trouble.
The content of the invention
In order to overcome the deficiencies in the prior art, the utility model provides a kind of four half-bridge sensor series four of high precision
Angular measurement electronic scale circuit.
The utility model solves the technical scheme that its technical problem used：
A kind of four angular measurement electronic scale circuits of half-bridge sensor series four, including four pressure sensors of resistance-type
S1, pressure sensor S2, pressure sensor S3 and pressure sensor S4, the pressure sensor S1, pressure sensor S2, pressure
Sensor S3 and pressure sensor S4 include two the resistance R, the pressure sensor S1 of series connection, pressure sensor S4, pressure
Force snesor S3 and pressure sensor S2 are sequentially connected in series the electric bridge to be formed with power supply contact and six signal measuring points, the power supply
Contact include with the positive source VDD of two Node connectedness of resistance R in the pressure sensor S1 and with the pressure sensing
Two power cathode GND of the Node connectedness of resistance R in device S3, six signal measuring points are respectively：With the pressure sensing
Two Node connectedness of resistance R in two the measurement end AI0 and the pressure sensor S2 of the Node connectedness of resistance R in device S4
Measurement end AI1 and the pressure sensor S1 and pressure sensor S2 Node connectedness measurement end AI2 and the pressure
The measurement end AI3 of the Node connectedness of the sensor S1 and pressure sensor S4 and pressure sensor S2 and pressure sensor S3
Node connectedness measurement end AI4 and the pressure sensor S3 and pressure sensor S4 Node connectedness measurement end AI5.
The beneficial effects of the utility model are：The utility model is not only surveyed to the electric bridge that four pressure sensors are constituted
Amount, also measures the output relation between four pressure sensors respectively, four respective outputs of pressure sensor is obtained, by four
Footmark is determined, and reduces the requirement that pressure sensor selects pairing, improves production first-pass yield, easy to maintenance, by four-point electronics
Scale corner unbalance loading performance is greatly improved, and precision is improve more than ten times.
Brief description of the drawings
The utility model is further illustrated with reference to the accompanying drawings and examples.
Fig. 1 is four angular measurements electronic scale circuit of the prior art；
Fig. 2 is four angular measurements electronic scale circuit of the present utility model.
Specific embodiment
Reference picture 2, a kind of four angular measurement electronic scale circuits of half-bridge sensor series four, including four pressure of resistance-type
Sensor S1, pressure sensor S2, pressure sensor S3 and pressure sensor S4, the pressure sensor S1, pressure sensor
S2, pressure sensor S3 and pressure sensor S4 include two resistance R of series connection, the pressure sensor S1, pressure sensing
Device S4, pressure sensor S3 and pressure sensor S2 are sequentially connected in series the electric bridge to be formed with power supply contact and six signal measuring points,
The power supply contact include with the positive source VDD of two Node connectedness of resistance R in the pressure sensor S1 and with it is described
Two power cathode GND of the Node connectedness of resistance R in pressure sensor S3, six signal measuring points are respectively：With it is described
Two resistance R in two the measurement end AI0 and the pressure sensor S2 of the Node connectedness of resistance R in pressure sensor S4
The measurement end AI2 of the Node connectedness of the measurement end AI1 of Node connectedness and the pressure sensor S1 and pressure sensor S2 and
The measurement end AI3 of the Node connectedness of the pressure sensor S1 and pressure sensor S4 and the pressure sensor S2 and pressure
The survey of the Node connectedness of the measurement end AI4 of the Node connectedness of sensor S3 and the pressure sensor S3 and pressure sensor S4
Amount end AI5.
Measurement end AI0, measurement end AI1 are whole Wheatstone bridge（Wheatstone bridge）Measured value, measurement end
Output relation between AI2, measurement end AI3, measurement end AI4, four pressure sensors of measurement end AI5 measured values, is calculated
Four respective outputs of pressure sensor, by increase by four pin sensors measurement and software correction, make corner unbalance loading performance and
Precision is greatly improved.
Software correction principle is as follows：
AD=AD1*C/C1+AD2*C/C2+AD3*C/C3+AD4*C/C4；
Wherein,
AD1, AD2, AD3, AD4 are four single outputs of pressure sensor；
C is standard value；
C1, C2, C3, C4 are four pressure sensor standard values；
C/C1, C/C2, C/C3, C/C4 are four proportionate relationships of pressure sensor.
Obtained by adding same weight to correct, C1=AD1；C2=AD2；C3=AD3；C4=AD4, when weighing, by calculating AD
=AD1*C/C1+AD2*C/C2+AD3*C/C3+AD4*C/C4 can just correct the error that unbalance loading is brought.
The utility model is not only measured to the electric bridge that four pressure sensors are constituted, and four pressure is also measured respectively and is passed
Output relation between sensor, obtains four respective outputs of pressure sensor, is demarcated by corner, reduces pressure sensor
The requirement of pairing is selected, production first-pass yield is improve, it is easy to maintenance, four-point electronic scale corner unbalance loading performance is greatly improved,
And precision is improve more than ten times.
Claims (1)
1. a kind of four angular measurement electronic scale circuits of half-bridge sensor series four, including four pressure sensor S1 of resistance-type,
Pressure sensor S2, pressure sensor S3 and pressure sensor S4, the pressure sensor S1, pressure sensor S2, pressure are passed
Sensor S3 and pressure sensor S4 include two resistance R of series connection, it is characterised in that the pressure sensor S1, pressure sensing
Device S4, pressure sensor S3 and pressure sensor S2 are sequentially connected in series the electric bridge to be formed with power supply contact and six signal measuring points,
The power supply contact include with the positive source VDD of two Node connectedness of resistance R in the pressure sensor S1 and with it is described
Two power cathode GND of the Node connectedness of resistance R in pressure sensor S3, six signal measuring points are respectively：With it is described
Two resistance R in two the measurement end AI0 and the pressure sensor S2 of the Node connectedness of resistance R in pressure sensor S4
The measurement end AI2 of the Node connectedness of the measurement end AI1 of Node connectedness and the pressure sensor S1 and pressure sensor S2 and
The measurement end AI3 of the Node connectedness of the pressure sensor S1 and pressure sensor S4 and the pressure sensor S2 and pressure
The survey of the Node connectedness of the measurement end AI4 of the Node connectedness of sensor S3 and the pressure sensor S3 and pressure sensor S4
Amount end AI5.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621463952.8U CN206300711U (en) | 2016-12-29 | 2016-12-29 | A kind of four angular measurement electronic scale circuits of half-bridge sensor series four |
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| CN201621463952.8U CN206300711U (en) | 2016-12-29 | 2016-12-29 | A kind of four angular measurement electronic scale circuits of half-bridge sensor series four |
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| CN206300711U true CN206300711U (en) | 2017-07-04 |
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| CN201621463952.8U Active CN206300711U (en) | 2016-12-29 | 2016-12-29 | A kind of four angular measurement electronic scale circuits of half-bridge sensor series four |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106706085A (en) * | 2016-12-29 | 2017-05-24 | 广东沃莱科技有限公司 | Four-corner measurement electronic scale circuit formed through series connection of four half-bridge sensors |
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2016
- 2016-12-29 CN CN201621463952.8U patent/CN206300711U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106706085A (en) * | 2016-12-29 | 2017-05-24 | 广东沃莱科技有限公司 | Four-corner measurement electronic scale circuit formed through series connection of four half-bridge sensors |
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