CN102928148B - A kind of modification method of tension measurements - Google Patents
A kind of modification method of tension measurements Download PDFInfo
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- CN102928148B CN102928148B CN201210403189.XA CN201210403189A CN102928148B CN 102928148 B CN102928148 B CN 102928148B CN 201210403189 A CN201210403189 A CN 201210403189A CN 102928148 B CN102928148 B CN 102928148B
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- tension
- value
- roller
- modification method
- tension pick
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Abstract
A modification method for tension measurements, described modification method comprises the following steps: two tension pick-ups are arranged in sensor base by (1) side by side, described two tension pick-ups series connection; (2) power on sheet material or wire rod opens roller through to tension force inductive component by the survey of tension pick-up, the power F that two tension force inductive components obtain
a, F
b, corrected Calculation obtains current tensile value F:F=F
b+ (F
b-F
a)/2.The present invention can eliminate the impact of friction force automatically by measurements and calculations, obtains more accurate tension value.
Description
Technical field
The present invention relates to a kind of measured value modification method of tension pick-up.
Background technology
Tension pick-up is also tension detector, in tension force control procedure, for measuring the instrument of wire rod or strip tension values size variation, for conventional strain flap-type tension pick-up, its tensile strain sheet and compressive strain sheet link together according to electric bridge mode, when being subject to external pressure, the resistance value of foil gauge also changes thereupon, and the number of changes values will be proportional to the size of suffered tension force.
The development of tension pick-up is very ripe, and the model of tension pick-up and installation form also divide multiple.Because tension pick-up is by the form indirect inspection tension value of compressive strain sheet, so, obtain the value of thrust on wire rod or band, usually certain cornerite is formed by jockey pulley and a survey roller, pressure is applied by surveying a roller, make tension pick-up sensitive element produce displacement or distortion, tension pick-up can calculate the value of thrust that will measure again by built-in signal processor according to the change of foil gauge resistance value.
The tension pick-up of existing maturation, band or wire rod only need be laid out by jockey pulley and a survey roller just can measure value of thrust.But the measured value of tension pick-up indirectly obtains by acting on the force value of opening on roller side, the numerical value so obtained by survey calculation is the value of thrust surveying a roller two ends band or wire rod, band or wire rod are again by after jockey pulley, and due to the impact of friction force, its tension value can change.The tension value that sensor measurement out shows is F
n1, then the pulling force surveying roller one end stay cord is F
n1, after jockey pulley walked around by stay cord, carry out force analysis for jockey pulley, the friction force between setting stay cord and jockey pulley is f, so can obtain rope end value of thrust F according to equilibrium of forces principle
n2=F
n1+ f.When wire rod or band are moved by pulling force sensor, f is the power of a variation, and the direction of friction force f is relevant with the relative displacement between rope and jockey pulley, and sensor cannot carry out the elimination of friction force by built-in signal processor.
Although by improving jockey pulley surface processing accuracy, adopting the mode of lubricating bearings to reduce friction between jockey pulley and sensor base, but, for shaggy material to be measured, or strip material great with jockey pulley contact area, the impact of friction force is far longer than the impact of end bearing own frictional drag, has an impact to measurement result, equally, for the tension control system of some superhigh precisions, existing strain measuring method can not meet the requirement of its precision.
Summary of the invention
In order to overcome existing measurement value sensor by friction effects, deficiency that precision is lower, the invention provides a kind of modification method of tension measurements, automatically can be eliminated the impact of friction force by measurements and calculations, obtain more accurate tension value.
The technical solution adopted for the present invention to solve the technical problems is:
A modification method for tension measurements, described modification method comprises the following steps:
(1) two tension pick-ups are arranged in sensor base side by side, described two tension pick-ups series connection;
(2) power on sheet material or wire rod opens roller through to tension force inductive component by the survey of tension pick-up, the power F that two tension force inductive components obtain
a, F
b, corrected Calculation obtains current tensile value F:F=F
b+ (F
b-F
a)/3.
Beneficial effect of the present invention is: the impact automatically can being eliminated friction force by measurements and calculations, obtains more accurate tension value.
Accompanying drawing explanation
Fig. 1 is the schematic diagram of the combination unit of the modification method of tension measurements.
Embodiment
Below in conjunction with accompanying drawing, the present invention will be further described.
With reference to Fig. 1, a kind of modification method of tension measurements, described modification method comprises the following steps:
(1) two tension pick-ups 1,2 are arranged in sensor base side by side, described two tension pick-ups series connection;
(2) power on sheet material or wire rod opens roller through to tension force inductive component by the survey of tension pick-up, the power F that two tension force inductive components obtain
a, F
b, corrected Calculation obtains current tensile value F:F=F
b+ (F
b-F
a)/3.
In the present embodiment, achieve based on mentioned strain sensor device the measuring method that the tension pick-up can eliminating friction effects obtains tension value accurately, comprise following steps:
(1), obtain according to the change of foil gauge resistance value the size F surveying a roller upward pressure
n
Power on sheet material or wire rod passes to the tension force inductive component of axle head by surveying a roller, according to the measuring principle of existing sensor, sheet material or wire rod are to the pressure size F surveying a roller
nbe proportional to the resistance value of foil gauge, just can show that sheet material or band act on the size surveying a roller upward pressure value by the change of resistance value.
(2), by force value F
nobtain the size surveying a roller side sheet material or band pull-up force value
When sheet material or band are by surveying roller, and the angle surveyed between a roller is a constant definite value, F
nfor the tension force at sheet material or band two ends is surveying the component in a roller radial direction.So pass through F
nthe size surveying tension force on roller one end sheet material or band can be calculated with angle value.In computation process, the pulling force of Zhang Gun two ends, side stay cord is equal, does not in fact consider the impact of friction force, is a mean value through measuring the value of thrust obtained.And relative to friction force, the value of thrust of stay cord wants large many.As Fig. 1, we make F
a=F
2, F
b=F
4, F
a, F
bfor sensor passes through F
nwith the tension value of the stay cord that angle value calculates.
(3), utilize two groups of tension force inductive components to obtain sheet material or wire rod and survey to open friction force size between roller and jockey pulley, then eliminate friction force in result, obtain accurate tension value.
When wire rod or band are by surveying a roller and jockey pulley, the size and Orientation of its friction force f and the pulling force size on material to be measured, surfaceness, direction of motion, material are relevant.Therefore, surveying under the identical prerequisite of roller and jockey pulley diameter and material, surfaceness, can think that band is similar to identical with wire rod and the single survey friction force f opened between roller or jockey pulley.
We pass two sensors, as Fig. 1, F', F for stay cord
1, F
2, F
3, F
4, F
5, F is pulling force on this section of rope, F end for measuring junction, F
a, F
bfor the tension measurements on sensor a, b, S, N are two direction of motion of stay cord.
1, when stay cord moves along S direction.The direction of friction force f is contrary with stay cord direction of motion.
F
a＝F
2F
b＝F
5
The direction of f is contrary with the direction of motion of material to be measured therefore
F
1＝F'+f F
2＝F
1+f F
3＝F
2+f F
4＝F
3+f F
5＝F
4+fF＝F
5+f
F can be obtained fom the above equation
2=F'+2f
F
5＝F
2+3f＝F'+5f
So F
5-F
2=3f
f＝(F
5-F
2)/3
F
a, F
bfor known quantity, so obtain friction force f=(F by above formula
b-F
a)/3
When material to be measured moves along the direction of S, the value of thrust of output is accurately F=F
5+ f=F
b+ f
I.e. F=F
b+ (F
b-F
a)/3
2, when stay cord counter motion, when namely stay cord moves along N direction, friction force is contrary with stay cord direction of motion all the time, and F is measuring junction.
F
a＝F
2F
b＝F
5
The direction of f is contrary with the direction of motion of material to be measured therefore
F
5＝F+f F
4＝F
5+f F
3＝F
4+f F
2＝F
3+f F
1＝F
2+fF'＝F
1+f
F can be obtained fom the above equation
5=F+f
F
2＝F
5+3f＝F+4f
So F
2-F
5=3f
f＝(F
2-F
5)/3
F
a, F
bfor known quantity, so obtain friction force f=(F by above formula
a-F
b)/3
When material to be measured moves along the direction of S, the value of thrust of output is accurately F=F
5-f=F
b-f
I.e. F=F
b-(F
a-F
b)/3=F
b+ (F
b-F
a)/3
From 1,2, no matter stay cord toward which direction moves, and measured value comes to the same thing.
3, when stay cord is static, and jockey pulley and survey between roller and there is static friction.From 1,2, the result of measurement is only relevant with sensor a, b measured value.I.e. F=F
b+ (F
b-F
a)/3.
The signal F that two sensors is measured
a, F
b, flow to outside signal controller, controller internal encoder can eliminate the impact of friction force by above-mentioned calculating, exports accurate tension value.
The method that the present invention adopts utilizes two groups of tension pick-up series connection, utilize the measured value of two sensors, by signal controller, calculate side and open friction force between roller and band or wire rod, the final impact eliminating friction force in result, obtains the method for more Accurate tension value.
Claims (1)
1. a modification method for tension measurements, is characterized in that: described modification method comprises the following steps:
(1) two tension pick-ups are arranged in sensor base side by side, each described tension pick-up comprises the first jockey pulley, surveys roller, second jockey pulley, surveying a roller is located between two jockey pulleys, sheet material or wire rod are sequentially by the first jockey pulley, survey roller, second jockey pulley of each described tension pick-up, and described two tension pick-ups are connected along material by direction;
(2) power on sheet material or wire rod is opened roller by the survey of tension pick-up and is passed to tension force inductive component, the power F that two tension force inductive components obtain
a, F
b, corrected Calculation obtains current tensile value F:F=F
b+ (F
b-F
a)/3.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210403189.XA CN102928148B (en) | 2012-10-22 | 2012-10-22 | A kind of modification method of tension measurements |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210403189.XA CN102928148B (en) | 2012-10-22 | 2012-10-22 | A kind of modification method of tension measurements |
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| Publication Number | Publication Date |
|---|---|
| CN102928148A CN102928148A (en) | 2013-02-13 |
| CN102928148B true CN102928148B (en) | 2015-08-05 |
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ID=47643003
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210403189.XA Active CN102928148B (en) | 2012-10-22 | 2012-10-22 | A kind of modification method of tension measurements |
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Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113790840B (en) * | 2021-09-13 | 2024-02-09 | 苏州创易技研股份有限公司 | Method for automatically keeping tension data of set tension device stable |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2747299B1 (en) * | 1977-10-21 | 1979-03-08 | Hoechst Ag | Method and device for monitoring the evenness of the tensile stress acting on a moving sheet of insulating material |
| CN101201281A (en) * | 2006-12-12 | 2008-06-18 | Abb有限公司 | Method and system in connection with tension measurement of material web |
| CN202119570U (en) * | 2011-05-23 | 2012-01-18 | 蚌埠天光传感器有限公司 | Pulley type tension sensor |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE10046844A1 (en) * | 2000-09-20 | 2002-04-18 | Sahm Georg Fa | Winding machine for particularly sensitive items to be wound |
-
2012
- 2012-10-22 CN CN201210403189.XA patent/CN102928148B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2747299B1 (en) * | 1977-10-21 | 1979-03-08 | Hoechst Ag | Method and device for monitoring the evenness of the tensile stress acting on a moving sheet of insulating material |
| CN101201281A (en) * | 2006-12-12 | 2008-06-18 | Abb有限公司 | Method and system in connection with tension measurement of material web |
| CN202119570U (en) * | 2011-05-23 | 2012-01-18 | 蚌埠天光传感器有限公司 | Pulley type tension sensor |
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|---|---|
| CN102928148A (en) | 2013-02-13 |
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Effective date of registration: 20171212 Address after: 313000 Zhejiang Province, Huzhou city Wuxing District Road No. 1188 district headquarters free port B building 14 Building 1403 room Patentee after: Zhejiang creation Intellectual Property Service Co., Ltd. Address before: Hangzhou City, Zhejiang province 310014 City Zhaohui District Six Patentee before: Zhejiang University of Technology |
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Effective date of registration: 20191125 Address after: 215100 1 Wuzhong Road, Yuexi street, Wuzhong Economic Development Zone, Suzhou, Jiangsu, China, 1368 Patentee after: Suzhou Wei you Intellectual Property Operation Co., Ltd. Address before: 313000 Room 1403, 14th Floor, Building B, Freeport, Headquarters 1188 District Fulu Road, Wuxing District, Huzhou City, Zhejiang Province Patentee before: Zhejiang creation Intellectual Property Service Co., Ltd. |