CN109084870A - Four foot scales of one kind, its pressure sensitive circuit and weighing method - Google Patents
Four foot scales of one kind, its pressure sensitive circuit and weighing method Download PDFInfo
- Publication number
- CN109084870A CN109084870A CN201811096417.7A CN201811096417A CN109084870A CN 109084870 A CN109084870 A CN 109084870A CN 201811096417 A CN201811096417 A CN 201811096417A CN 109084870 A CN109084870 A CN 109084870A
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- Prior art keywords
- semibridge system
- system strain
- pressure sensitive
- sensitive circuit
- strain gauges
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- 238000000034 method Methods 0.000 title claims abstract description 11
- 238000005303 weighing Methods 0.000 title claims abstract description 8
- 238000009434 installation Methods 0.000 claims 1
- 230000006698 induction Effects 0.000 abstract 1
- 238000004519 manufacturing process Methods 0.000 description 6
- 238000001514 detection method Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 238000012423 maintenance Methods 0.000 description 3
- 238000005259 measurement Methods 0.000 description 3
- 239000012636 effector Substances 0.000 description 2
- 238000009826 distribution Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01G—WEIGHING
- G01G3/00—Weighing apparatus characterised by the use of elastically-deformable members, e.g. spring balances
- G01G3/12—Weighing apparatus characterised by the use of elastically-deformable members, e.g. spring balances wherein the weighing element is in the form of a solid body stressed by pressure or tension during weighing
- G01G3/14—Weighing apparatus characterised by the use of elastically-deformable members, e.g. spring balances wherein the weighing element is in the form of a solid body stressed by pressure or tension during weighing measuring variations of electrical resistance
- G01G3/142—Circuits specially adapted therefor
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01G—WEIGHING
- G01G3/00—Weighing apparatus characterised by the use of elastically-deformable members, e.g. spring balances
- G01G3/12—Weighing apparatus characterised by the use of elastically-deformable members, e.g. spring balances wherein the weighing element is in the form of a solid body stressed by pressure or tension during weighing
- G01G3/14—Weighing apparatus characterised by the use of elastically-deformable members, e.g. spring balances wherein the weighing element is in the form of a solid body stressed by pressure or tension during weighing measuring variations of electrical resistance
- G01G3/1414—Arrangements for correcting or for compensating for unwanted effects
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01G—WEIGHING
- G01G3/00—Weighing apparatus characterised by the use of elastically-deformable members, e.g. spring balances
- G01G3/12—Weighing apparatus characterised by the use of elastically-deformable members, e.g. spring balances wherein the weighing element is in the form of a solid body stressed by pressure or tension during weighing
- G01G3/14—Weighing apparatus characterised by the use of elastically-deformable members, e.g. spring balances wherein the weighing element is in the form of a solid body stressed by pressure or tension during weighing measuring variations of electrical resistance
- G01G3/1414—Arrangements for correcting or for compensating for unwanted effects
- G01G3/1418—Arrangements for correcting or for compensating for unwanted effects for temperature variations
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01G—WEIGHING
- G01G3/00—Weighing apparatus characterised by the use of elastically-deformable members, e.g. spring balances
- G01G3/18—Temperature-compensating arrangements
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Measurement Of Force In General (AREA)
Abstract
Four foot scales of one kind, its pressure sensitive circuit and weighing method, the pressure sensitive circuit includes four semibridge system strain gauges and four output ends, four semibridge system strain gauges are mounted on the four corners of the four feet scale, and four semibridge system strain gauges are in parallel and two common ends connect as input terminal with DC power supply and ground；Four output ends connect correspondingly with the midpoint of four semibridge system strain gauges.The four feet scale includes above-mentioned pressure sensitive circuit, MCU and display, and the MCU is separately connected four output ends of the pressure sensitive circuit and is connected with the display.This method comprises: the pressure value of four positions of induction；The penalty coefficient of each position is adjusted according to the pressure value of four positions；And using the penalty coefficient as weight, the weighted average of the pressure value of four positions is calculated, as by the weight of title object.After foregoing circuit, the coherence request of strain gauge is reduced.
Description
Technical field
The present invention relates to four foot scales more particularly to the pressure sensitive circuits of four foot scales, using the four of the pressure sensitive circuit
Foot scale, and it is related to weighing method.
Background technique
Four foot scales, including human body balance, kitchen scale, pedometer produced at present etc. are using four semibridge system strain gauge 21-
24 are mounted on the four corners (as shown in Figure 1) of electronic scale 1.As shown in Fig. 2, the equivalent circuit of semibridge system strain gauge is resistance value phase
Deng the circuit that is composed in series of resistance R1 and resistance R2, there are two end and a midpoints for semibridge system strain gauge tool.Such as Fig. 3 institute
Show, the pressure sensitive circuit of four current foot scales is will be end to end after four semibridge system strain gauge 21-24 series connection, and by two
The midpoint of a semibridge system strain gauge is as input terminal connection DC power supply 3 and ground 4, by the midpoint of other two semibridge system strain gauge
As output end, a Wheatstone bridge is constituted, strain is detected by the output voltage of the Wheatstone bridge.By the pressure of Fig. 3
Power sensor circuit can be seen that the output that this circuit is unable to measure single strain gauge, so the output characteristics of four stress gauges
Unanimously it just must be able to satisfy location error requirement, i.e., weighing result phase when could make that object is claimed to be placed on different location on pan of a steelyard
Together.However due to foozle etc., the output characteristics for designing identical strain gauge can be variant.Therefore, in manufacture quadrangle
When scale, in order to meet the requirement of location error, generallys use measurement and select the method for pairing output characteristics is consistent to answer to select
Become meter, it is also necessary to which unbalance loading detection station is set, these will lead to increased costs, and production yield is not high.Moreover, being answered when one
After becoming meter damage, needs all to replace four stress gauges, maintenance cost is caused to increase.
Summary of the invention
It is an object of the present invention to provide a kind of pressure sensitive circuit of four foot scales, which is able to detect
The pressure of multiple positions.
It is a further object to provide a kind of four foot scales, to solve existing four feet scale to strain gauge output characteristics
The high technical problem of coherence request.
A kind of pressure sensitive circuit of four feet scale provided by the invention includes:
Four semibridge system strain gauges are mounted on the four corners of the four feet scale, and four semibridge system strain gauges are in parallel,
Two common ends of four semibridge system strain gauges connect as input terminal with DC power supply and ground；And
Four output ends connect correspondingly with the midpoint of four semibridge system strain gauges.
The in parallel, multiplexing by the semibridge system strain gauge for being mounted on four foot scale four corners of above-mentioned pressure sensitive circuit, constitutes
Four Wheatstone bridges, can the pressure to four positions individually detect.
In order to reduce influence of the extreme temperature to measurement result, further in four output ends and the semibridge system to connect
Temperature compensating element is plugged between the midpoint of strain gauge.
A kind of four feet scale provided by the invention, circuit part include pressure sensitive circuit, MCU and display, the pressure
Power sensor circuit includes: four semibridge system strain gauges and four output ends, and four semibridge system strain gauges are mounted on described four
The four corners of foot scale, four semibridge system strain gauges are in parallel, two common end conducts of four semibridge system strain gauges
Input terminal connects with DC power supply and ground；The midpoint of four output ends and four semibridge system strain gauges is one-to-one
Connect；The MCU is separately connected four output ends of the pressure sensitive circuit, and the MCU is connected with the display.
When work, the weighted average that MCU calculates the pressure value of four positions of above-mentioned pressure sensitive circuit output by software is obtained
By the weight of title object, and the size of the pressure value according to four positions, weight is adjusted, i.e. change penalty coefficient, it is automatic to compensate
Deviation of weight caused by position deviation.
The present invention also provides a kind of weighing methods of four foot scales, method includes the following steps:
Incude the pressure value of four positions；
The penalty coefficient of each position is adjusted according to the pressure value of four positions；And
Using the penalty coefficient as weight, the weighted average of the pressure value of four positions is calculated, as by the weight of title object
Amount.
Compared with prior art, the present invention at least has the advantages that
Above-mentioned pressure sensitive circuit realizes four positions using the semibridge system effector for being mounted on four foot scale four corners
Independent detection.
After foregoing circuit, the coherence request of strain gauge is reduced, strain gauge is chosen when can reduce four foot scale of manufacture
The requirement of apolegamy pair, can save unbalance loading detection station, can be improved production yield and facilitate maintenance.
Detailed description of the invention
Fig. 1 is the distribution schematic diagram of strain gauge in four foot scales；
Fig. 2 is the equivalent circuit diagram of semibridge system effector；
Fig. 3 is the pressure sensitive circuit of existing four feet scale；
Fig. 4 is the preferred embodiment circuit diagram of the pressure sensitive circuit of four foot scales of the invention；
Fig. 5 is an embodiment circuit of four foot scales.
Specific embodiment
The present invention will be further described with reference to the accompanying drawings and examples.
For the convenience of description, four semibridge system strain gauges are hereinafter referred to as the first semibridge system strain gauge, the second half
Bridge-type strain gauge, third semibridge system strain gauge and the 4th semibridge system strain gauge, by four output ends be referred to as the first output end,
Second output terminal, third output end and the 4th output end.It may be noted that first, second, third, fourth in present specification,
Not order of representation or primary and secondary.
Please refer to Fig. 1, Fig. 4, the pressure sensitive circuit of four foot scale of preferred embodiment include: the first semibridge system strain gauge 21,
Second semibridge system strain gauge 22, third semibridge system strain gauge 23 and the 4th semibridge system strain gauge 24, further include the first output end 51,
Second output terminal 52, third output end 53 and the 4th output end 54.It include four semibridge system strain gauges and four output ends.
As shown in Figure 1, the first semibridge system strain gauge 21, the second semibridge system strain gauge 22,23 and of third semibridge system strain gauge
4th semibridge system strain gauge 24 is distributed in the four corners of quadrangle scale 1.
As shown in figure 4, the first semibridge system strain gauge 21, the second semibridge system strain gauge 22,23 and of third semibridge system strain gauge
4th semibridge system strain gauge 24 is in parallel, and a common end connects as input terminal with DC power supply 3, another common end is made
Connect for input terminal with ground 4.First output end 51, second output terminal 52, third output end 53 and the 4th output end 54 are corresponding to be connected
Connect the midpoint of the first semibridge system strain gauge 21, the midpoint of the second semibridge system strain gauge 22, third semibridge system strain gauge 23 midpoint
With the midpoint of the 4th semibridge system strain gauge 24.
In above-mentioned pressure sensitive circuit, the first semibridge system strain gauge 21 and the second semibridge system strain gauge 22 constitute the first favour this
Energization bridge, the voltage between the first output end 51 and second output terminal 52 are the output voltage of the first Wheatstone bridge, this first
The output voltage of Wheatstone bridge has reacted the pressure value in Fig. 1 at upside, is denoted as AD1.
In above-mentioned pressure sensitive circuit, third semibridge system strain gauge 23 and the 4th semibridge system strain gauge 24 constitute the second favour this
Energization bridge, the voltage between third output end 53 and the 4th output end 54 are the output voltage of the second Wheatstone bridge, this second
The output voltage of Wheatstone bridge has reacted the pressure value in Fig. 1 at downside, is denoted as AD2.
In above-mentioned pressure sensitive circuit, the first semibridge system strain gauge 21 and third semibridge system strain gauge 23 constitute third favour this
Energization bridge, the voltage between the first output end 51 and third output end 53 are the output voltage of third Wheatstone bridge, the third
The output voltage of Wheatstone bridge has reacted the pressure value in Fig. 1 at left side, is denoted as AD3.
In above-mentioned pressure sensitive circuit, the second semibridge system strain gauge 22 and the 4th semibridge system strain gauge 24 constitute the 4th favour this
Energization bridge, voltage between second output terminal 52 and the 4th output end 54 are the output voltage of the 4th Wheatstone bridge, the 4th
The output voltage of Wheatstone bridge has reacted the pressure value in Fig. 1 at right side, is denoted as AD4.
As it can be seen that above-mentioned pressure sensitive circuit is in parallel by the semibridge system strain gauge for being mounted on four foot scale four corners, is multiplexed, group
At four Wheatstone bridges, the pressure value of four positions can be exported respectively.
The four foot scales constituted with above-mentioned pressure sensitive circuit can pass through four of the above-mentioned pressure sensitive circuit output of calculating
The weighted average of the pressure value AD1-AD4 of position, obtains the weight for being claimed object, can be by software according to the pressure of four positions
The size of force value AD1-AD4 adjusts the weight of four pressure value AD1-AD4, i.e. change penalty coefficient, and it is inclined to compensate position automatically
Deviation of weight caused by difference.Thus, it is possible to which strain gauge selects the requirement of pairing when reducing by four foot scale of manufacture, unbalance loading inspection can be saved
Station is surveyed, can be improved production yield and facilitates maintenance.
Fig. 5 shows a kind of circuit of four foot scales.As shown in figure 5, the circuit part of the four feet scale includes above-mentioned feeling of stress
Answer circuit 100.In addition, further including MCU200 and display 300.It is first defeated to be separately connected pressure sensitive circuit 100 by MCU200
Outlet 51, second output terminal 52, third output end 53 and the 4th output end 54, and be connected with display 300.MCU200 is built-in with
Software, the software calculate the weighted average of the pressure value AD1-AD4 for four positions that above-mentioned pressure sensitive circuit 100 exports,
The weight for being claimed object, and the size of the pressure value according to four positions are obtained, weight is adjusted, is i.e. change penalty coefficient, automatically
Compensate deviation of weight caused by position deviation.
It, can be further in four output ends and the half-bridge to connect in order to reduce influence of the extreme temperature to measurement result
Grafting temperature compensating element, such as thermo-compensator between the midpoint of formula strain gauge.
A kind of weighing method of four feet scale the following steps are included:
Incude the pressure value of four positions；
The penalty coefficient of each position is adjusted according to the pressure value of four positions；And
Using the penalty coefficient as weight, the weighted average of the pressure value of four positions is calculated, as by the weight of title object
Amount.
Above by specific embodiment, invention is explained in detail, these detailed description are only limited to help
Those skilled in the art understand that the contents of the present invention, can not be interpreted as limiting the scope of the invention.Art technology
Personnel should be included in protection model of the invention to various retouchings, the equivalent transformation etc. that above scheme carries out under present inventive concept
In enclosing.
Claims (5)
1. a kind of pressure sensitive circuit of four foot scales, which is characterized in that the pressure sensitive circuit includes:
Four semibridge system strain gauges are mounted on the four corners of the four feet scale, and four semibridge system strain gauges are in parallel, and four
Two common ends of the semibridge system strain gauge connect as input terminal with DC power supply and ground；And
Four output ends connect correspondingly with the midpoint of four semibridge system strain gauges.
2. the pressure sensitive circuit of four feet scale according to claim 1, which is characterized in that four output ends and connect
Semibridge system strain gauge midpoint between be plugged with temperature compensating element.
3. a kind of four foot scales, including circuit part, which is characterized in that the circuit part includes pressure sensitive circuit, MCU and shows
Show device,
The pressure sensitive circuit includes four semibridge system strain gauges and four output ends, four semibridge system strain gauge installations
In the four corners of the four feet scale, four semibridge system strain gauges are in parallel, two public affairs of four semibridge system strain gauges
End connects as input terminal with DC power supply and ground altogether；The midpoint one of four output ends and four semibridge system strain gauges
One corresponding connects；
The MCU is separately connected four output ends of the pressure sensitive circuit, and the MCU is connected with the display.
4. four feet scale according to claim 3, which is characterized in that four output ends and the semibridge system strain gauge to connect
Midpoint between be plugged with temperature compensating element.
5. a kind of weighing method of four foot scales, which comprises the following steps:
Incude the pressure value of four positions；
The penalty coefficient of each position is adjusted according to the pressure value of four positions；And
Using the penalty coefficient as weight, the weighted average of the pressure value of four positions is calculated, as by the weight of title object.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811096417.7A CN109084870B (en) | 2018-09-19 | 2018-09-19 | Four-foot scale, pressure sensing circuit and weighing method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811096417.7A CN109084870B (en) | 2018-09-19 | 2018-09-19 | Four-foot scale, pressure sensing circuit and weighing method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109084870A true CN109084870A (en) | 2018-12-25 |
| CN109084870B CN109084870B (en) | 2024-05-10 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811096417.7A Active CN109084870B (en) | 2018-09-19 | 2018-09-19 | Four-foot scale, pressure sensing circuit and weighing method thereof |
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| Country | Link |
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| CN (1) | CN109084870B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115335667A (en) * | 2020-04-16 | 2022-11-11 | 威辛斯公司 | Weighing apparatus and method |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0101247A2 (en) * | 1982-08-17 | 1984-02-22 | Toledo Scale Corporation | Compensated multi-load cell scale |
| US5515737A (en) * | 1992-12-03 | 1996-05-14 | Ishida Co., Ltd. | Weighing apparatus |
| CN101603849A (en) * | 2008-06-09 | 2009-12-16 | 株式会社百利达 | Multi-point scale and its manufacturing method |
| CN103292888A (en) * | 2013-05-28 | 2013-09-11 | 北京农业信息技术研究中心 | Calibration protecting mechanism of electronic scale |
| CN206300712U (en) * | 2016-12-29 | 2017-07-04 | 广东沃莱科技有限公司 | A four-point weighing electronic scale circuit |
| CN107966193A (en) * | 2017-11-02 | 2018-04-27 | 广东乐心医疗电子股份有限公司 | Electronic scale capable of measuring in divided mode |
| CN208984185U (en) * | 2018-09-19 | 2019-06-14 | 深圳市乐福衡器有限公司 | Four foot scales of one kind and its pressure sensitive circuit |
-
2018
- 2018-09-19 CN CN201811096417.7A patent/CN109084870B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0101247A2 (en) * | 1982-08-17 | 1984-02-22 | Toledo Scale Corporation | Compensated multi-load cell scale |
| US5515737A (en) * | 1992-12-03 | 1996-05-14 | Ishida Co., Ltd. | Weighing apparatus |
| CN101603849A (en) * | 2008-06-09 | 2009-12-16 | 株式会社百利达 | Multi-point scale and its manufacturing method |
| CN103292888A (en) * | 2013-05-28 | 2013-09-11 | 北京农业信息技术研究中心 | Calibration protecting mechanism of electronic scale |
| CN206300712U (en) * | 2016-12-29 | 2017-07-04 | 广东沃莱科技有限公司 | A four-point weighing electronic scale circuit |
| CN107966193A (en) * | 2017-11-02 | 2018-04-27 | 广东乐心医疗电子股份有限公司 | Electronic scale capable of measuring in divided mode |
| CN208984185U (en) * | 2018-09-19 | 2019-06-14 | 深圳市乐福衡器有限公司 | Four foot scales of one kind and its pressure sensitive circuit |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115335667A (en) * | 2020-04-16 | 2022-11-11 | 威辛斯公司 | Weighing apparatus and method |
| CN115335667B (en) * | 2020-04-16 | 2023-06-27 | 威辛斯公司 | Weighing device and method |
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| Publication number | Publication date |
|---|---|
| CN109084870B (en) | 2024-05-10 |
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