CN1940514A - Force-measuring sensing method - Google Patents
Force-measuring sensing method Download PDFInfo
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- CN1940514A CN1940514A CN 200510100193 CN200510100193A CN1940514A CN 1940514 A CN1940514 A CN 1940514A CN 200510100193 CN200510100193 CN 200510100193 CN 200510100193 A CN200510100193 A CN 200510100193A CN 1940514 A CN1940514 A CN 1940514A
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Abstract
A method for testing force-sensing includes analyzing finite element of component to be tested to obtain strain parameter of finite element, selecting out nominal optimized sticking-position combination of strain foil gauge from said strain parameters, sticking strain foil gauges on positions listed in said sticking-position combination as per specific angle to form Wheatstone bridge, lading electric charge on component to be tested and comparing calculated bridge voltage difference with actually measured bridge voltage difference and testing optimized sticking-position combination of strain foil gauge according to comparison result, applying said combination at on-site for selecting out most optimum one.
Description
Technical field
The present invention relates to measuring technology, relate in particular to a kind of force-measuring sensing method.
Background technology
The realization of force cell is by several foil gauges are pasted on certain elastic body and by circuit these several foil gauges to be connected into Wheatstone bridge, in the time of the stress unit stress deformation, the resistance of foil gauge and the output of Wheatstone bridge change, relationship between this output and the primary load is got up, and this stress unit just can be regarded a force cell as.
If the part shape more complicated determines that the paste position of foil gauge will be difficult to.Can correctly install for the ease of device for measuring force, the method of traditional collection load is that the parts of an identical carrying are taken off or made again to (as automobile) parts, sometimes also can think some other way, ultimate principle all is to determine the paste position and the stickup direction of foil gauge around mechanics of materials correlation theory or test method.
For example, in order to reach test purpose, in the prior art, all need by car body is raised certain distance, so that place traditional force cell, determine the correctness and the error range of test result then by test repeatedly, still, if the parts of automobile are taken out separately or make again, in case left car body, will more or less on indexs such as rigidity, depart from actual value, and then the measured value of force cell is exerted an influence, make measured value under-represented, lack persuasion, like this, using traditional method to measure just needs test repeatedly and needs to infer certain error range, operate miscellaneously, and precision is low.
Summary of the invention
The object of the present invention is to provide a kind of easy and simple to handle, the force-measuring sensing method that precision is high, miscellaneous to overcome in the prior art operation, and the low deficiency of precision.
Force-measuring sensing method of the present invention comprises the steps:
A, by to the finite element analysis of UUT, obtain the analysis result of finite element, obtain the strain parameter of finite element unit;
B, from the strain parameter of described finite element unit, choose the foil gauge paste position combination that nominal is optimized;
C, adhere in the foil gauge paste position that described nominal optimizes by special angle, constitute Wheatstone bridge by described foil gauge;
D, to the UUT imposed load, according to the electric bridge pressure reduction that above-mentioned strain parameter calculated, compare with the electric bridge pressure reduction of actual measurement;
E, select the foil gauge paste position combination of test optimization according to comparative result.
In the described step e, set a predetermined value, carry out following operation:
When sensitivity that described comparative result reflected met predetermined value and requires, the foil gauge paste position combination that existing nominal is optimized was when the foil gauge paste position combination as test optimization;
When sensitivity that described comparative result reflected does not meet predetermined value and requires, then repeat abovementioned steps B-step D, again choose the foil gauge paste position combination that nominal is optimized, meet the predetermined value requirement until the sensitivity that comparative result reflected of the foil gauge paste position combination of described nominal optimization.
After the described step e, comprise the steps: that also foil gauge paste position applied in any combination with described test optimization among the scene, chooses the combination of optimize strain sheet paste position.
In the described steps A, described finite element analysis is exactly that UUT is divided into limited several junior units small, that can artificially control, by UUT being applied major concern load and all interference load, calculate by data analysis, obtain the output result of finite element;
In the described steps A, following steps are adopted in described finite element analysis:
A1, set up a finite element model, that is, UUT is divided Mesh Processing, it is divided into several junior units;
A2, constraint UUT, and put on the UUT separately major concern load and interference load respectively, UUT is applied major concern load, test out all finite element data { Ai}, at least this UUT is applied an interference load separately, { Bi} is by { Ai} is with { comparison of Bi}, analysis obtain the pairing strain parameter in particular finite element position at least to the finite element data to test out all finite element data.
Described strain parameter comprises the maximum strain amount e of finite element unit correspondence at least
Max, minimum strain amount e
MinVariable quantity θ with the principal strain angle.
In the described steps A 1, the size of described junior unit is between 5mm-10mm.
In the described steps A 2, in described FEM (finite element) calculation, employed rudimentary algorithm is: F=KU, and wherein: F represents the force vector of finite element node; K represents finite element matrix; U represents the motion vector of finite element node;
At each finite element, at first determine the local stiffness matrix k and the local force vector f of this finite element, by packing algorithm each local stiffness matrix k and local force vector f are grouped together then, form finite element matrix K with global coordinate system and the force vector F that limits first node;
Dividing after Mesh Processing finishes, load applies and finishes, and F and K be promptly as known quantity, the motion vector U that obtains the finite element node according to the force vector F and the finite element matrix K of finite element node.
In the described steps A 2, at first carry out following steps:, from finite element model, it is masked and does not consider for the actual pairing finite element unit, UUT position that can not paste foil gauge.
Among the described step B, when the described foil gauge paste position of choosing nominal optimization makes up, according to the strain parameter of finite element unit, for the maximum strain amount e of different finite elements position
Max, minimum strain amount e
MinValue compare respectively, the finite element unit of the finite element unit of obtaining relative dependent variable maximum and relative dependent variable minimum makes up as the foil gauge paste position.
Among the described step C, for the paster that has two shear strain sheets, its paster direction and finite element unit shaft are to becoming miter angle.
Among the described step D, during to the UUT imposed load, apply major concern load, calculate the sensitivity of this foil gauge paste position combination according to the calculated value of electric bridge pressure reduction and actual measured value to UUT;
Among the described step D, also apply interference load separately, test, the effect of calculating disturbing factor, the size of quantification disturbing factor to UUT.
Among the described step D, when calculating electric bridge pressure reduction according to strain parameter, when being in the direction that is elongated for the paster of foil gauge, the correction of foil gauge is determined according to the largest unit distortion that the major concern loading produces down; When being in compressed direction for the paster of foil gauge, the correction of foil gauge is determined according to the minimum unit distortion that the major concern loading produces down;
Among the described step D, when calculating electric bridge pressure reduction, adopt following calculating: V according to strain parameter
0=V * [(R
1+ dR
1)/(R
1+ dR
1+ R
4+ dR
4)-(R
2+ dR
2)/(R
2+ dR
2+ R
3+ dR
3)], wherein, R
1, R
2, R
3, R
4Be the nominal resistance of each foil gauge, dR
1, dR
2, dR
3, dR
4Resistance change for each foil gauge;
When the paster of foil gauge was in the direction that is elongated, the unit strain that the effect of interference load produces down was by following calculating:
Disturb strain 1=(e
Max+ e
Min)/2+ ((e
Max-e
Min)/2) * cos2 θ;
When the paster of foil gauge was in the direction that is elongated, the unit strain that the effect of interference load produces down was by following calculating:
Disturb strain 2=(e
Max+ e
Min)/2+ ((e
Max-e
Min)/2) * cos2 (θ-90)
Described foil gauge changes in resistance draws according to following formula:
DR=GF * e * R, wherein, GF is the paster coefficient of foil gauge, and R is the nominal resistance of foil gauge, and e is the dependent variable of foil gauge, and this e value is defined as described interference strain 1 or disturbs strain 2.
Beneficial effect of the present invention is: in the present invention, by outside UUT, setting up the finite element analysis model of these parts, come qualitative by loading major concern load and interference load to finite element model, the unit strained situation of these parts of quantitative test, adopt Computing, determine specifically should paste foil gauge according to analysis result then in what position, like this, interference load can be proofreaied and correct in sensing transforms accurately to the influence of UUT, just UUT self is converted into an accurate force cell, and then eliminate the additive error that the reasons such as placement location owing to traditional force cell cause, make test data more accurately credible, the present invention pastes by suitable foil gauge and circuit connects and forms Wheatstone bridge, mushing error is controlled in the certain limit, therefore, the present invention is easy and simple to handle, the precision height; In the present invention, finite element is applied in the test, obtain the dependent variable size at each position, determine rational patch location by finite element analysis, with traditional static Finite Element Analysis bigger difference is arranged, this finite element analysis among the present invention has been carried out quantification treatment more specifically for finite element, has guaranteed degree of accuracy of the present invention on principle.
Description of drawings
Fig. 1 is a control flow synoptic diagram of the present invention;
Fig. 2 is a finite element analysis control flow synoptic diagram of the present invention;
Fig. 3 is a front rack modular construction synoptic diagram of the present invention;
Fig. 4 is a front rack parts finite element model structural representation of the present invention;
Fig. 5 is that paster is pasted synoptic diagram in the embodiment of the invention;
Fig. 6 is the circuit diagram of Wheatstone bridge in the embodiment of the invention.
Embodiment
With embodiment the present invention is described in further detail with reference to the accompanying drawings below:
Present embodiment is elaborated at 5 pairs of application of the present invention of front rack parts of a heavy goods vehicle particularly, as shown in Figure 3, these front rack parts 5 are linear semi-girders, in heavy goods vehicle, by bolt hole 28 and pilot hole 22 be connected to the side of car body, by application of the present invention, the major concern load 24 of the vertical effect of pilot hole 22 is passed through in reflection, the effect situation under interference-free load 26 influences.
As shown in Figure 1, concrete control flow of the present invention is as follows:
1. as shown in Figure 1, front rack parts 5 are carried out finite element analysis, set up finite element model, obtain the analysis result of finite element, obtain the strain parameter of finite element unit, its concrete control flow as shown in Figure 2:
11, as shown in Figure 2, set up a finite element model, as shown in Figure 4, front rack parts 5 are divided Mesh Processing, it is divided into several junior units, wherein the size of junior unit is good between 5mm-10mm.
12, as shown in Figure 2, for the actual pairing finite element unit, UUT position that can not paste foil gauge, from finite element model, it is masked and does not consider.
13, as shown in Figures 2 and 3, by bolt hole 28 constraint front rack parts 5, carriage member 5 applies major concern load 24 forward.
14, as shown in Figure 2, by Computing, test out the finite element unit the finite element data Ai}, in the present invention, for this FEM (finite element) calculation, employed rudimentary algorithm is: F=KU, wherein: F represents the force vector of finite element node; K represents finite element matrix; U represents the motion vector of finite element node.
At each finite element, at first determine the local stiffness matrix k and the local force vector f of this finite element, by packing algorithm each local stiffness matrix k and local force vector f are grouped together then, form finite element matrix K with global coordinate system and the force vector F that limits first node.
Like this, in fact dividing after Mesh Processing finishes, major concern load 24 applies and finishes, and F and K be promptly as known quantity, the motion vector U that obtains the finite element node according to the force vector F and the finite element matrix K of finite element node.
15, as shown in Figures 2 and 3, carriage member 5 applies interference load 26 separately forward.
16, as shown in Figure 2, as mentioned above in like manner, test out the finite element data { Bi} of finite element unit.
17, as shown in Figure 2, { Ai} is with { comparison of Bi}, analysis obtain a series of Multidimensional numerical data, and a specific finite element position is then corresponding to specific strain parameter, as maximum strain amount e to the finite element data
Max, minimum strain amount e
MinWith the variable quantity θ at principal strain angle etc.
Like this, finite element analysis by above-mentioned steps 11-step 17, front rack parts 5 are divided into limited several junior units small, that can artificially control, by UUT being applied major concern load and interference load, calculate by data analysis, obtain the output result and the strain parameter of finite element.
2. as shown in Figure 1, from the strain parameter of above-mentioned finite element unit, choose the foil gauge paste position combination that nominal is optimized, according to the strain parameter of finite element unit, for the maximum strain amount e of different finite elements position
Max, minimum strain amount e
MinValue compare the finite element unit of the finite element unit of obtaining relative dependent variable maximum and relative dependent variable minimum, the foil gauge paste position combination of optimizing as nominal respectively.
3. as shown in Figure 1, adhere in the foil gauge paste position of described nominal optimization by special angle by foil gauge, constitute Wheatstone bridge, in the present embodiment, as shown in Figure 5, adopt two pasters 42,44 that have two shear strain sheets, two shear strain sheet 42a, 42b are arranged on the paster 42, two shear strain sheet 44a, 44b are arranged on the paster 44, the direction of paster 42,44 becomes miter angle with finite element unit shaft 00 ', as shown in Figure 6, constitute Wheatstone bridge by shear strain sheet 42a, 42b, 44a, 44b.
4. as shown in Figure 1, front rack parts 5 are applied major concern load 24.
5. calculate as shown in Figure 1, the electric bridge pressure reduction V of this Wheatstone bridge
0, calculating electric bridge pressure reduction V according to strain parameter
0The time, when being in the direction that is elongated for the paster of foil gauge, the correction of foil gauge is determined according to the largest unit distortion that the major concern loading produces down; When being in compressed direction for the paster of foil gauge, the correction of foil gauge is determined according to the minimum unit distortion that the major concern loading produces down, as shown in Figure 5 and Figure 6, shear strain sheet 42a, 44a are stretched, and shear strain sheet 42b, 44b are compressed.In the present invention, electric bridge pressure reduction V
0Adopt following calculating:
V
0＝V×[(R
1+dR
1)/(R
1+dR
1+R
4+dR
4)-(R
2+dR
2)/(R
2+dR
2+R
3+dR
3)]
Wherein, the foil gauge changes in resistance draws according to following formula:
dR＝GF×e×R
Wherein, GF is the paster coefficient of foil gauge, and R is the nominal resistance of foil gauge, and e is the dependent variable of foil gauge, and paster coefficient and nominal resistance are known to each shear strain sheet 42a, 42b, 44a, 44b.
As for determining of dependent variable e,,, adopt following calculating because shear strain sheet 42a, 44a are stretched according to the above:
Disturb strain 1=(e
Max+ e
Min)/2+ ((e
Max-e
Min)/2) * cos2 θ
The interference strain 1 that shear strain sheet 42a, 44a calculate respectively according to this formula is for cutting
The dependent variable e of shear strain sheet 42a, 44a.
Because shear strain sheet 42b, 44b are compressed, adopt following calculating:
Disturb strain 2=(e
Max+ e
Min)/2+ ((e
Max-e
Min)/2) * cos2 (θ-90)
So, then can calculate electric bridge pressure reduction V
0
To calculate electric bridge pressure reduction V
0Electric bridge pressure reduction V with reality
0Compare, obtain the sensitivity of sensor.
6. as shown in Figure 1, set a predetermined value, carry out following operation:
When sensitivity that described comparative result reflected meets predetermined value and requires, as, when sensitivity during more than or equal to predetermined value, the foil gauge paste position combination that above-mentioned nominal is optimized is when the foil gauge paste position combination as test optimization, and, continue following steps 7 in addition to preserve;
When sensitivity that described comparative result reflected does not meet predetermined value and requires, as, when sensitivity during less than predetermined value, then repeat abovementioned steps 2-step 6, again choose the foil gauge paste position combination that nominal is optimized, the sensitivity that comparative result reflected until the combination of the foil gauge paste position of described nominal optimization meets the predetermined value requirement, continues following steps 7.
7. as shown in Figure 1, carriage member 5 applies interference load 26 separately forward, and test, the effect of calculating disturbing factor quantize the size of disturbing factor, and calculating wherein repeats no more as principle unanimity as described in the above-mentioned step 5 herein; And the size of disturbing factor is preserved.
8. as shown in Figure 1, last foil gauge paste position applied in any combination according to test optimization among the scene, is carried out following operation:
If the combination of the foil gauge paste position of test optimization is suitable for rig-site utilization, it is saved as the combination of optimize strain sheet paste position, continue following steps 9.
If the combination of the foil gauge paste position of test optimization is not suitable for rig-site utilization, because in the operation of reality of the present invention, may obtain the foil gauge paste position combination of more than one group test optimization in above-mentioned steps 6, therefore, can take out the foil gauge paste position combination of next group test optimization, repeat this step.
9. preserve all related datas of described optimize strain sheet paste position combination, the data naturalization is handled output parameter.
Claims (17)
1. force-measuring sensing method, it is characterized in that: it comprises the steps:
A, by to the finite element analysis of UUT, obtain the analysis result of finite element, obtain the strain parameter of finite element unit;
B, from the strain parameter of described finite element unit, choose the foil gauge paste position combination that nominal is optimized;
C, adhere in the foil gauge paste position that described nominal optimizes by special angle, constitute Wheatstone bridge by described foil gauge;
D, to the UUT imposed load, according to the electric bridge pressure reduction that above-mentioned strain parameter calculated, compare with the electric bridge pressure reduction of actual measurement;
E, select the foil gauge paste position combination of test optimization according to comparative result.
2. force-measuring sensing method according to claim 1 is characterized in that: in the described step e, set a predetermined value, carry out following operation:
When sensitivity that described comparative result reflected met predetermined value and requires, the foil gauge paste position combination that existing nominal is optimized was when the foil gauge paste position combination as test optimization;
When sensitivity that described comparative result reflected does not meet predetermined value and requires, then repeat abovementioned steps B-step D, again choose the foil gauge paste position combination that nominal is optimized, meet the predetermined value requirement until the sensitivity that comparative result reflected of the foil gauge paste position combination of described nominal optimization.
3. force-measuring sensing method according to claim 1 is characterized in that: after the described step e, comprise the steps: that also foil gauge paste position applied in any combination with described test optimization among the scene, chooses the combination of optimize strain sheet paste position.
4. according to claim 1 or 2 or 3 described force-measuring sensing methods, it is characterized in that: in the described steps A, described finite element analysis is exactly that UUT is divided into limited several junior units small, that can artificially control, by UUT being applied major concern load and all interference load, calculate by data analysis, obtain the output result of finite element.
5. force-measuring sensing method according to claim 4 is characterized in that: in the described steps A, following steps are adopted in described finite element analysis:
A1, set up a finite element model, UUT is divided Mesh Processing, it is divided into several junior units;
A2, constraint UUT, and put on the UUT separately major concern load and interference load respectively, UUT is applied major concern load, test out all finite element data { Ai}, at least this UUT is applied an interference load separately, { Bi} is by { Ai} is with { comparison of Bi}, analysis obtain the pairing strain parameter in particular finite element position at least to the finite element data to test out all finite element data.
6. force-measuring sensing method according to claim 5 is characterized in that: described strain parameter comprises the maximum strain amount e of finite element unit correspondence at least
Max, minimum strain amount e
MinVariable quantity θ with the principal strain angle.
7. force-measuring sensing method according to claim 5 is characterized in that: in the described steps A 1, the size of described junior unit is between 5mm-10mm.
8. force-measuring sensing method according to claim 5 is characterized in that: in the described steps A 2, in described FEM (finite element) calculation, employed rudimentary algorithm is: F=KU, wherein:
F represents the force vector of finite element node;
K represents finite element matrix;
U represents the motion vector of finite element node;
At each finite element, at first determine the local stiffness matrix k and the local force vector f of this finite element, by packing algorithm each local stiffness matrix k and local force vector f are grouped together then, form finite element matrix K with global coordinate system and the force vector F that limits first node;
Dividing after Mesh Processing finishes, load applies and finishes, and F and K be promptly as known quantity, the motion vector U that obtains the finite element node according to the force vector F and the finite element matrix K of finite element node.
9. force-measuring sensing method according to claim 5, it is characterized in that: in the described steps A 2, at first carry out following steps:, from finite element model, it is masked and does not consider for the actual pairing finite element unit, UUT position that can not paste foil gauge.
10. force-measuring sensing method according to claim 5 is characterized in that: among the described step B, when the described foil gauge paste position of choosing nominal optimization makes up, according to the strain parameter of finite element unit, for the maximum strain amount e of different finite elements position
Max, minimum strain amount e
MinValue compare respectively, the finite element unit of the finite element unit of obtaining relative dependent variable maximum and relative dependent variable minimum makes up as the foil gauge paste position.
11. force-measuring sensing method according to claim 5 is characterized in that: among the described step C, for the paster that has two shear strain sheets, its paster direction and finite element unit shaft are to becoming miter angle.
12. force-measuring sensing method according to claim 1, it is characterized in that: among the described step D, during to the UUT imposed load, apply major concern load, calculate the sensitivity of this foil gauge paste position combination according to the calculated value of electric bridge pressure reduction and actual measured value to UUT.
13. force-measuring sensing method according to claim 12 is characterized in that: among the described step D, also apply interference load separately, test, the effect of calculating disturbing factor, the size of quantification disturbing factor to UUT.
14. according to claim 1 or 12 or 13 described force-measuring sensing methods, it is characterized in that: among the described step D, when calculating electric bridge pressure reduction according to strain parameter, when being in the direction that is elongated for the paster of foil gauge, the correction of foil gauge is determined according to the largest unit distortion that the major concern loading produces down; When being in compressed direction for the paster of foil gauge, the correction of foil gauge is determined according to the minimum unit distortion that the major concern loading produces down.
15., it is characterized in that: among the described step D, when calculating electric bridge pressure reduction, adopt following calculating according to strain parameter according to claim 1 or 12 or 13 described force-measuring sensing methods:
V
0＝V×[(R
1+dR
1)/(R
1+dR
1+R
4+dR
4)-(R
2+dR
2)/(R
2+dR
2+R
3+DR
3)]，
Wherein, R
1, R
2, R
3, R
4Be the nominal resistance of each foil gauge, dR
1, dR
2, dR
3, dR
4Resistance change for each foil gauge.
16. force-measuring sensing method according to claim 15 is characterized in that: when the paster of foil gauge was in the direction that is elongated, the unit strain that the effect of interference load produces down was by following calculating:
Disturb strain 1=(e
Max+ e
Min)/2+ ((e
Max-e
Min)/2) * cos2 θ;
When the paster of foil gauge was in the direction that is elongated, the unit strain that the effect of interference load produces down was by following calculating:
Disturb strain 2=(e
Max+ e
Min)/2+ ((e
Max-e
Min)/2) * cos2 (θ-90)
17. force-measuring sensing method according to claim 16 is characterized in that: described foil gauge changes in resistance draws according to following formula:
DR=GF * e * R, wherein, GF is the paster coefficient of foil gauge, and R is the nominal resistance of foil gauge, and e is the dependent variable of foil gauge, and this e value is defined as described interference strain 1 or disturbs strain 2.
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|---|---|---|---|
| CN 200510100193 CN1940514A (en) | 2005-09-30 | 2005-09-30 | Force-measuring sensing method |
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|---|---|---|---|
| CN 200510100193 CN1940514A (en) | 2005-09-30 | 2005-09-30 | Force-measuring sensing method |
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| CN102175357A (en) * | 2011-03-09 | 2011-09-07 | 上海交通大学 | Method for directly measuring bearing force based on structure micro-strain |
| CN102496229A (en) * | 2011-12-28 | 2012-06-13 | 杨晓辉 | Floor antitheft apparatus |
| CN105352715A (en) * | 2015-11-24 | 2016-02-24 | 北京卫星制造厂 | Separation testing method for axial force, bending moment and torque of load for a drilling tool |
| CN105953953A (en) * | 2016-04-28 | 2016-09-21 | 辽宁科技学院 | Pin embedded measuring method for tapered friction pair contact pressure |
| CN107449537A (en) * | 2016-04-20 | 2017-12-08 | 森萨塔科技有限公司 | The manufacture method of pressure sensor |
| CN110108400A (en) * | 2019-06-04 | 2019-08-09 | 福建省威盛机械发展有限公司 | Stress real-time monitoring system and its control method applied to forklift truck body structure |
| CN111177848A (en) * | 2019-12-26 | 2020-05-19 | 中国航空工业集团公司西安飞机设计研究所 | Method and device for acquiring strain theoretical value based on finite element model |
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2005
- 2005-09-30 CN CN 200510100193 patent/CN1940514A/en active Pending
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102175357B (en) * | 2011-03-09 | 2013-03-27 | 上海交通大学 | Method for directly measuring bearing force based on structure micro-strain |
| CN102175357A (en) * | 2011-03-09 | 2011-09-07 | 上海交通大学 | Method for directly measuring bearing force based on structure micro-strain |
| CN102496229A (en) * | 2011-12-28 | 2012-06-13 | 杨晓辉 | Floor antitheft apparatus |
| CN102496229B (en) * | 2011-12-28 | 2013-11-20 | 杨晓辉 | Floor antitheft apparatus |
| CN105352715A (en) * | 2015-11-24 | 2016-02-24 | 北京卫星制造厂 | Separation testing method for axial force, bending moment and torque of load for a drilling tool |
| CN107449537A (en) * | 2016-04-20 | 2017-12-08 | 森萨塔科技有限公司 | The manufacture method of pressure sensor |
| CN107449537B (en) * | 2016-04-20 | 2021-04-02 | 森萨塔科技有限公司 | Method for manufacturing pressure sensor |
| CN105953953A (en) * | 2016-04-28 | 2016-09-21 | 辽宁科技学院 | Pin embedded measuring method for tapered friction pair contact pressure |
| CN110108400A (en) * | 2019-06-04 | 2019-08-09 | 福建省威盛机械发展有限公司 | Stress real-time monitoring system and its control method applied to forklift truck body structure |
| CN112629833A (en) * | 2019-09-25 | 2021-04-09 | 上海汽车集团股份有限公司 | Load acquisition method and device |
| CN112629833B (en) * | 2019-09-25 | 2024-04-19 | 上海汽车集团股份有限公司 | Load acquisition method and device |
| CN111177848A (en) * | 2019-12-26 | 2020-05-19 | 中国航空工业集团公司西安飞机设计研究所 | Method and device for acquiring strain theoretical value based on finite element model |
| CN111177848B (en) * | 2019-12-26 | 2023-05-23 | 中国航空工业集团公司西安飞机设计研究所 | Method and device for acquiring strain theoretical value based on finite element model |
| CN111442824A (en) * | 2020-04-03 | 2020-07-24 | 山东钢铁集团日照有限公司 | Dynamic detection method for iron content of vehicle-mounted iron package and implementation system thereof |
| CN114952693A (en) * | 2021-02-26 | 2022-08-30 | 硕丰工业股份有限公司 | Clutch type power transmission device and torsion detection module thereof |
| CN114563069A (en) * | 2022-03-15 | 2022-05-31 | 南京邮电大学 | Comprehensive high-precision intelligent vehicle real-time weighing method and system thereof |
| CN114563069B (en) * | 2022-03-15 | 2023-12-12 | 南京邮电大学 | Comprehensive high-precision intelligent vehicle real-time weighing method and system |
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