CN101608960B - Method for determining paste position of strain gauge of sensor - Google Patents
Method for determining paste position of strain gauge of sensor Download PDFInfo
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- CN101608960B CN101608960B CN2009100414078A CN200910041407A CN101608960B CN 101608960 B CN101608960 B CN 101608960B CN 2009100414078 A CN2009100414078 A CN 2009100414078A CN 200910041407 A CN200910041407 A CN 200910041407A CN 101608960 B CN101608960 B CN 101608960B
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- 238000000034 method Methods 0.000 title claims abstract description 26
- 238000005259 measurement Methods 0.000 claims abstract description 7
- 239000011888 foil Substances 0.000 claims description 18
- 238000012545 processing Methods 0.000 claims description 3
- 229920001971 elastomer Polymers 0.000 abstract description 7
- 239000000806 elastomer Substances 0.000 abstract description 7
- 238000010586 diagram Methods 0.000 description 11
- 230000000694 effects Effects 0.000 description 9
- 239000000463 material Substances 0.000 description 6
- 230000035945 sensitivity Effects 0.000 description 6
- 230000015572 biosynthetic process Effects 0.000 description 2
- 238000005303 weighing Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000001186 cumulative effect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
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Abstract
The invention discloses a method for determining a paste position of a strain gauge of a sensor. The method comprises the following steps: carrying out gridding treatment on an elastomer of a strain type sensor to divide the elastomer into a plurality of units; applying a vertically downward positive pressure to the elastomer to cause the elastomer to deform; measuring the unit deformation amount of the elastomer; and determining the paste position of the strain gauge of the strain type sensor according to the deformation amount. By adopting the embodiment of the invention, the measurement precision of the strain type sensor can be improved.
Description
Technical field
The present invention relates to sensor technical field, relate in particular to a kind of method of paste position of definite strain gauge of sensor.
Background technology
Belted electronic balance is to be used for measuring weight of material in the commercial production and widely used measurement instrument, in the dynamic process of belt operation, belt with contained material with constant tension force and even velocity by the weighing section on the scale frame, the weighing carriage is given LOAD CELLS with contained material weight transmitting, the belt travelling speed is carried out tracking measurement by speed pickup, and the weight of material under the certain speed in the unit interval is asked for the cumulative weight that integration can obtain material.
The pressure transducer that is adopted on the belted electronic balance mostly is strain gauge transducer, modal is S type diplopore beam pressure sensor, it utilizes the resistance strain effect of metal, when mechanically deform takes place in tinsel under external force, its resistance value also will change, circuit is converted to electric signal with resistance variations after testing again, thereby finishes the process that external force is transformed to electric signal.In traditional S type diplopore beam pressure sensor, post four resistance strain gages on the inwall of elastic body hollow position, be in respectively two hole inwalls directly over and under, four foil gauges are formed a fourth class arm electric bridge, when being subjected to the external force effect, the elastic body inside surface will produce small deformation, make the resistance of four foil gauges change, by the corresponding voltage signal of imbalance output of electric bridge, thus the size of measurement external force.
Belt in actual motion, the stressed complexity of the pressure transducer on the belted electronic balance, the pressure except contained weight of material produces also can produce additional disturbing force in the belt operational process.Because belt bears a heavy burden, in the process of advancing can to pressure transducer produce one with working direction thrust in the same way, the interference of this thrust will make pressure transducer produce deformation inevitably, export undesired signal, thereby have influence on the precision of belt conveyer scale.
At present, the interference problem of the forward direction thrust that causes at the belt heavy burden, solution is from the angle of improvement scale shelf structure mostly, for example adopts full suspension scale frame, methods such as ball perhaps is installed, its complicated operation, and cost height on the sensor top.
Summary of the invention
The embodiment of the invention provides a kind of method of paste position of definite strain gauge of sensor, can improve the measuring accuracy of strain gauge transducer.
The embodiment of the invention has proposed a kind of method of paste position of definite strain gauge of sensor, comprising:
Elastic body to strain gauge transducer carries out the gridding processing, and described elastic body is divided into a plurality of unit;
Apply vertically downward normal pressure to described elastic body, make described elastic body produce deformation;
Measure the deformation quantity of described elastomeric unit, determine the paste position of the foil gauge of described strain gauge transducer according to described deformation quantity.
Wherein, described strain gauge transducer is a S type diplopore beam pressure sensor; Described S type diplopore beam pressure sensor comprises middle part hollow elastic body and four resistance strain gages, and described elastomeric hollow part is a diplopore hole shape;
The deformation quantity of the described elastomeric unit of then described measurement, determine according to described deformation quantity specifically to comprise the method for paste position of the foil gauge of described strain gauge transducer:
Elastomeric central longitudinal section with described S type diplopore beam pressure sensor is a working face, measures each unit deformation quantity in the horizontal direction on the circumference of diplopore hole;
According to described deformation quantity, select the upper semicircumference of each hole in the described diplopore hole and the unit of the deformation quantity maximum on second circumference respectively;
With the residing position, four unit selected paste position as four resistance strain gages of described S type diplopore beam pressure sensor.
Implement the present invention, have following beneficial effect:
The method of the paste position of definite strain gauge of sensor that the embodiment of the invention provides is carried out gridding to the elastic body of strain gauge transducer and is handled, and elastic body is divided into a plurality of unit; Apply vertically downward normal pressure to elastic body, determine the paste position of strain gauge of sensor according to the deformation quantity of elastomeric unit.Implement the present invention, can improve the sensitivity of strain gauge transducer, reduce of the interference of horizontal side thrust, thereby improve the measuring accuracy of sensor sensor to positive pressure signal, and simple to operate, cost is low.
Description of drawings
Fig. 1 is the process flow diagram of method of the paste position of definite strain gauge of sensor provided by the invention;
Fig. 2 is the structural representation of S type diplopore beam pressure sensor provided by the invention;
Fig. 3 is the synoptic diagram of the balanced bridge of resistance strain gage formation provided by the invention;
Fig. 4 is the synoptic diagram of S type diplopore beam pressure sensor provided by the invention gridding;
Fig. 5 is the synoptic diagram of the S type diplopore beam pressure sensor under the external force effect provided by the invention;
Fig. 6 is the deformation synoptic diagram of the diplopore hole upper semicircumference of the S type diplopore beam pressure sensor under the positive pressure provided by the invention;
Fig. 7 is the deformation synoptic diagram of second circumference of diplopore hole of the S type diplopore beam pressure sensor under the positive pressure provided by the invention;
Fig. 8 is the deformation synoptic diagram of the diplopore hole upper semicircumference of the S type diplopore beam pressure sensor under the side-thrust effect provided by the invention;
Fig. 9 is the deformation synoptic diagram of second circumference of diplopore hole of the S type diplopore beam pressure sensor under the side-thrust effect provided by the invention.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the invention, the technical scheme in the embodiment of the invention is clearly and completely described, obviously, described embodiment only is the present invention's part embodiment, rather than whole embodiment.Based on the embodiment among the present invention, those of ordinary skills belong to the scope of protection of the invention not making the every other embodiment that is obtained under the creative work prerequisite.
Referring to Fig. 1, be the process flow diagram of method of the paste position of definite strain gauge of sensor provided by the invention, this method specifically may further comprise the steps:
S100 carries out gridding to the elastic body of strain gauge transducer and handles, and described elastic body is divided into a plurality of unit;
S101 applies vertically downward normal pressure to described elastic body, makes described elastic body produce deformation;
S102 measures the deformation quantity of described elastomeric unit, determines the paste position of the foil gauge of described strain gauge transducer according to described deformation quantity.
Be example with S type diplopore beam pressure sensor below, the method for the paste position of definite foil gauge provided by the invention is described in detail.
Referring to Fig. 2, be the structural representation of S type diplopore beam pressure sensor provided by the invention.
S type diplopore beam pressure sensor specifically comprises: elastic body 100, resistance strain gage 101, resistance strain gage 102, resistance strain gage 103 and resistance strain gage 104.
Wherein, the middle part of elastic body 100 has the hollow part of diplopore hole shape, hole 105 as shown in Figure 2 and hole 106.The resistance value of resistance strain gage 101, resistance strain gage 102, resistance strain gage 103 and resistance strain gage 104 original states equates that it sticks on the inwall of hole, and connects and composes balanced bridge.
As shown in Figure 3, be the synoptic diagram of the balanced bridge of resistance strain gage formation.Wherein, R
1, R
2, R
3, R4 is respectively the resistance value of resistance strain gage 101, resistance strain gage 102, resistance strain gage 103, resistance strain gage 104 original states, Δ R
1, Δ R
2, Δ R
3, Δ R
4Be respectively resistance strain gage 101, resistance strain gage 102, resistance strain gage 103, the resistance change when deformation takes place resistance strain gage 104.
Under original state, Δ R
1=Δ R
2=Δ R
3=Δ R
4=0, electric bridge is a balance, its output voltage U
o=0.
Under external force, output voltage U
oAs follows:
In embodiments of the present invention, make R
1=R
2=R
3=R
4=R is an equal arm bridge with bridge design, because Δ R
1, Δ R
2, Δ R
3, Δ R
4Be far smaller than R, can draw output voltage U
oAs follows:
By following formula as can be known, output voltage U
oLinear with the resistance change of resistance strain gage, adjacent brachium pontis answer Variable Polarity inequality, one of them is stretching strain, another is compressive strain, output voltage U
oBe both sums.When being subjected to external force, the elastic body of S type diplopore beam pressure sensor does the time spent, the inwall in elastomeric diplopore hole produces deformation, make four resistance strain gages also in company with deformation takes place, the deformation of resistance strain gage causes resistance value to change, by the corresponding voltage signal of imbalance output of electric bridge, finish the process that external force is transformed to electric signal.
Concrete, determine that the method for paste position of resistance strain gage of S type diplopore beam pressure sensor is as follows:
Elastic body to S type diplopore beam pressure sensor carries out the gridding processing, and elastic body is divided into a plurality of unit.In the middle of concrete enforcement, can adopt the ANSYS finite element analysis software, S type diplopore beam pressure sensor model is carried out gridding handle, cell type is selected PLANE42 and SOLID45.As shown in Figure 4, be that S type diplopore beam pressure sensor carries out the synoptic diagram that gridding is handled, wherein, S type diplopore beam pressure sensor node adds up to 3264, and the unit adds up to 13242, and model is the bottom constraint.
Apply vertically downward normal pressure to the elastic body of S type diplopore beam pressure sensor, make elastic body produce deformation, and with elastomeric central longitudinal section as working face, measure each unit deformation quantity in the horizontal direction on the circumference of diplopore hole.Deformation quantity according to each unit on the circumference of diplopore hole, select the upper semicircumference of each hole in the described diplopore hole and the unit of the deformation quantity maximum on second circumference respectively, with the residing position, four unit selected paste position as four resistance strain gages of S type diplopore beam pressure sensor.
Adopt the ANSYS finite element analysis software below, the deformation situation of elastic body under positive pressure of S type diplopore beam pressure sensor analyzed.
Shown in Fig. 5 (a), be the central longitudinal sectional view of elastic body under the effect of normal pressure of S type diplopore beam pressure sensor.Apply the normal pressure F1 of 500N along the Y-axis negative sense at elastomeric top center position, elastic body produces deformation, the deformation situation of each unit of the upper semicircumference in its diplopore hole (arc AB, arc BC) as shown in Figure 6, the deformation situation of each unit of second circumference in its diplopore hole (arc AD, arc DC) is as shown in Figure 7.
As shown in Figure 6, each unit on the transverse axis coordinate representation upper semicircumference (arc AB, arc BC) is far from the distance of high order end (being the A point), and ordinate of orthogonal axes is represented each unit deformation quantity in the horizontal direction.Wherein, on arc AB, the distance of ordering from A is that the normal pressure deformation quantity of the unit of 1.671cm is 3.157 * 10
-5M, the deformation quantity maximum; On arc BC, the distance of ordering from A is that the normal pressure deformation quantity of the unit of 3.952cm is-0.174 * 10
-5M, the deformation quantity maximum.
As shown in Figure 7, each unit on second circumference of transverse axis coordinate representation (arc AD, arc DC) is far from the distance of high order end (being the A point), and ordinate of orthogonal axes is represented each unit deformation quantity in the horizontal direction.Wherein, on arc AD, the distance of ordering from A is that the normal pressure deformation quantity of the unit of 1.058cm is-0.125 * 10
-5M, the deformation quantity maximum; On arc DC, the distance of ordering from A is that the normal pressure deformation quantity of the unit of 3.996cm is 2.709 * 10
-5M, the deformation quantity maximum.
From Fig. 6,7 as can be known, under the effect of normal pressure, the unit of the deformation quantity maximum on the upper semicircumference in diplopore hole and second circumference, positive pressure signal had higher sensitivity, therefore, with the position of above-mentioned four unit that are in normal pressure deformation quantity peak value place paste position, can improve the sensitivity of sensor measurement, thereby improve the measuring accuracy of sensor normal pressure to positive pressure signal as four resistance strain gages.
Shown in Fig. 5 (b), be the central longitudinal sectional view of elastic body under the effect of side-thrust of the S type diplopore beam pressure sensor of the embodiment of the invention.Apply the side-thrust F2 of 100N along the X-axis forward in the top position of elastomeric side, elastic body produces deformation, the deformation situation of each unit of the upper semicircumference in its diplopore hole (arc AB, arc BC) as shown in Figure 8, the deformation situation of each unit of second circumference in its diplopore hole (arc AD, arc DC) is as shown in Figure 9.
From Fig. 8,9 as can be known, be in four unit at normal pressure deformation quantity peak value place, under the side-thrust effect of 100N, the deformation quantity on its horizontal direction is as follows: on arc AB, the distance of ordering from A is that the side-thrust deformation quantity of the unit of 1.671cm is-0.978 * 10
-5M; On arc BC, the distance of ordering from A is that the side-thrust deformation quantity of the unit of 3.952cm is-8.246 * 10
-5M; On arc AD, the distance of ordering from A is that the side-thrust deformation quantity of the unit of 1.058cm is 1.441 * 10
-5M; On arc DC, the distance of ordering from A is that the side-thrust deformation quantity of the unit of 3.996cm is-5.889 * 10
-5M.
In traditional S type diplopore beam pressure sensor, the paste position of its four resistance strain gages lays respectively at the intermediate point of the semi-circumference up and down of diplopore hole inwall.The S type diplopore beam pressure sensor that the embodiment of the invention provides, paste position to traditional S type diplopore beam pressure sensor foil gauge improves, foil gauge is sticked on the normal pressure deformation quantity peak value place of the semi-circumference up and down of diplopore hole inwall, reach the purpose of the measuring accuracy that improves sensor.
Adopt the ANSYS finite element analysis software below, under identical elastomer model and identical outer force conditions, the deformation quantity of the S type diplopore beam pressure sensor that the embodiment of the invention is provided and traditional S type diplopore beam pressure sensor is measured respectively.
As shown in table 1, be the S type diplopore beam pressure sensor that provides of the embodiment of the invention and traditional S type diplopore beam pressure sensor under external force, the contrast figure of the deformation quantity of the elastomer unit of each foil gauge present position.
Wherein, the paste position of traditional S type diplopore beam pressure sensor foil gauge is the intermediate point of the semi-circumference up and down of diplopore hole inwall; S type diplopore beam pressure sensor after the improvement that the embodiment of the invention provides, the paste position of foil gauge are the normal pressure deformation quantity peak value place of the semi-circumference up and down of diplopore hole inwall.
Table 1
As can be seen from Table 1, the S type diplopore beam sensor of the improvement foil gauge paste position that the embodiment of the invention provides, compare with traditional S type diplopore beam sensor, each foil gauge to the remolding sensitivity of positive pressure signal traditional want high, and side-thrust is littler than traditional to the influence of each foil gauge.Further, adopt the ANSYS finite element analysis software also can analyze acquisition, the sensitivity of exporting when improved S type diplopore beam sensor is subjected to positive pressure is 3.6 times of traditional sensors, and side-thrust is 0.0215 times of traditional sensors to the influence that output valve caused.As seen, compare with traditional S type diplopore beam sensor, the S type diplopore beam sensor of the improvement foil gauge paste position that the embodiment of the invention provides has more outstanding performance.
The method of the paste position of definite strain gauge of sensor that the embodiment of the invention provides is carried out gridding to the elastic body of strain gauge transducer and is handled, and elastic body is divided into a plurality of unit; Apply vertically downward normal pressure to elastic body, make elastic body produce deformation, determine the paste position of strain gauge of sensor, can improve the measuring accuracy of sensor according to the deformation quantity of elastomeric unit.Method provided by the invention is applied in the S type diplopore beam sensor, do not need to change the structure of traditional S type diplopore beam sensor, only by changing the paste position of foil gauge, can improve the sensitivity of strain gauge transducer to positive pressure signal, and reduce of the interference of horizontal side thrust to sensor, simple to operate, cost is low.
Above embodiment only in order to the explanation the present invention and and unrestricted technical scheme described in the invention; Therefore, although this instructions has been described in detail the present invention with reference to each above-mentioned embodiment,, those of ordinary skill in the art should be appreciated that still and can make amendment or be equal to replacement the present invention; And all do not break away from the technical scheme and the improvement thereof of the spirit and scope of the present invention, and it all should be encompassed in the middle of the claim scope of the present invention.
Claims (1)
1. the method for the paste position of a definite strain gauge of sensor is characterized in that, comprising:
Elastic body to strain gauge transducer carries out the gridding processing, and described elastic body is divided into a plurality of unit;
Apply vertically downward normal pressure to described elastic body, make described elastic body produce deformation;
Measure the deformation quantity of described elastomeric unit, determine the paste position of the foil gauge of described strain gauge transducer according to described deformation quantity;
Wherein, described strain gauge transducer is a S type diplopore beam pressure sensor; Described S type diplopore beam pressure sensor comprises middle part hollow elastic body and four resistance strain gages, and described elastomeric hollow part is a diplopore hole shape;
The deformation quantity of the described elastomeric unit of then described measurement, determine according to described deformation quantity specifically to comprise the method for paste position of the foil gauge of described strain gauge transducer:
Elastomeric central longitudinal section with described S type diplopore beam pressure sensor is a working face, measures each unit deformation quantity in the horizontal direction on the circumference of diplopore hole;
According to described deformation quantity, select the upper semicircumference of each hole in the described diplopore hole and the unit of the deformation quantity maximum on second circumference respectively;
With the residing position, four unit selected paste position as four resistance strain gages of described S type diplopore beam pressure sensor.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009100414078A CN101608960B (en) | 2009-07-27 | 2009-07-27 | Method for determining paste position of strain gauge of sensor |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009100414078A CN101608960B (en) | 2009-07-27 | 2009-07-27 | Method for determining paste position of strain gauge of sensor |
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| CN101608960A CN101608960A (en) | 2009-12-23 |
| CN101608960B true CN101608960B (en) | 2011-02-16 |
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Families Citing this family (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102221325B (en) * | 2010-04-13 | 2013-05-08 | 精量电子（深圳）有限公司 | Method and equipment for separating foil gauge |
| CN102589790B (en) * | 2012-02-22 | 2013-11-20 | 河北省送变电公司 | Pressure detection device for hydraulic press |
| CH707008A1 (en) | 2012-09-27 | 2014-03-31 | Kistler Holding Ag | Strain transmitter. |
| CN108801772B (en) * | 2018-03-30 | 2021-01-08 | 鞍钢股份有限公司 | Strain gauge positioning method for high-speed tensile load test |
| CN108593058B (en) * | 2018-05-02 | 2019-10-08 | 北京航空航天大学 | Air drag tests balance |
| CN109883316B (en) * | 2019-03-22 | 2021-01-29 | 中国科学院力学研究所 | A resistive strain sensor and strain measurement method |
| CN109883315B (en) * | 2019-03-22 | 2021-01-01 | 中国科学院力学研究所 | A double-sided resistive strain sensor and strain measurement method |
| CN113176024B (en) * | 2021-04-16 | 2023-04-14 | 西安交通大学 | A non-linear split cylinder torque sensor |
| CN113758550B (en) * | 2021-09-08 | 2024-04-19 | 山东理工大学 | On-vehicle weighing device of semitrailer based on intermediary strain measurement |
| CN115452204B (en) * | 2022-08-30 | 2023-05-12 | 华能广西清洁能源有限公司 | Force sensing measurement method based on inverse magnetostriction effect |
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