CN105716746A - Force measurement method for switching external force measurement into internal measurement and force measurement device adopted by same - Google Patents
Force measurement method for switching external force measurement into internal measurement and force measurement device adopted by same Download PDFInfo
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- CN105716746A CN105716746A CN201610225394.XA CN201610225394A CN105716746A CN 105716746 A CN105716746 A CN 105716746A CN 201610225394 A CN201610225394 A CN 201610225394A CN 105716746 A CN105716746 A CN 105716746A
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- force
- force measurement
- base plate
- measurement
- external load
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L1/00—Measuring force or stress, in general
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Abstract
The invention discloses a force measurement method for switching external force measurement into internal measurement and a force measurement device adopted by the same.The force measurement device comprises a top plate, a base plate, a plurality of replaceable elastic force-bearing rods and a force measurement sensor, wherein the replaceable elastic force-bearing rods are evenly and vertically distributed between the top plate and the base plate, through holes are formed in the same side of the top plate and the base plate, the tail end of the force measurement sensor is connected with a first screw, the other end of the first screw is embedded into the through hole formed in the base plate and is fixed by using two locking nuts, a second screw is connected to the top end of the force measurement sensor, and the other end of the second screw is embedded into the through hole formed in the top plate and is fixed by using two locking nuts.The force measurement device utilizes the principle that an internal force mainly relies on the rigidity distribution of members under the external load effect, switches the external load measurement into structural internal force measurement and widens the using range of an existing force measurement sensor.Compared with the prior art, the force measurement device is simple in manufacturing and processing, and the force measurement method is simple and easy and convenient to operate.
Description
Technical field
The present invention relates to field of engineering technology, particularly a kind of force measuring method that external force measurement is converted into internal force measurement and device for measuring force thereof.
Background technology
Power is generally converted to the signal of telecommunication being proportional to amount of force by force cell, easy to use.In institute's force sensor, strain gauge transducer is most widely used, and can apply to from minimum to the measurement of very big dynamic static force, and certainty of measurement is high.Force cell especially cylindricality strain gauge transducer is widely used in the measurement of engineering actual loading, its external force undertaken in elastic range be deformed into proportional relation, but the elasticity of any dynamometry original paper is all relative, general only linear within the specific limits, exceeding elastic limit then stress-strain relation is curve, thus any force cell all has certain range, the signal of telecommunication is had to feed back although exceeding this range certain limit, but can not meet measuring accuracy, cannot be carried out Validity Test, in some instances it may even be possible to there will be the situation of damage test sensor.Multiformity due to engineering actual loading, the sensor of different range need to be adopted for accurately measuring different external loads, for this, Chinese Patent Application No.: 201020544369.6 develop a kind of Combined transducer force-measuring device, by by mode used in parallel for three standard transducers, it is possible to the problem solving wide range detection difficult well.But, the method need nonetheless remain for multiple small-range sensor and carries out parallel connection.In structural mechanics, the principle that under external load effect, each rod member internal force is allocated by rigidity, can be used for developing a kind of device for measuring force that external force measurement is converted into internal force measurement, make full use of the measured value beyond the existing force cell testing range scope with specific range.
Summary of the invention
The invention aims to solve the deficiency of prior art problem, there is provided a kind of and external force measurement is converted into force measuring method and the device for measuring force thereof that internal force is measured, combined by existing force cell and auxiliary elastic element and form test system, with satisfied different dynamometry demands, the testing requirement of engineering site can be met timely and effectively, purchase new sensor without for specific test purpose.
For reaching above-mentioned purpose, the present invention implements according to techniques below scheme:
A kind of force measuring method that external force measurement is converted into internal force measurement, comprises the following steps:
1) external load treating measurement is estimated, it is determined that measure the range needed for external load；
2) force cell is embedded being used for measuring in the device for measuring force of external load so that external load is not directly all undertaken by force cell, and force cell only undertakes a part of internal force wherein changed；
3), after installation, adopt the weight of known weight or load that whole device for measuring force is demarcated；
4) external load is acted on device for measuring force, carry out ratiometric conversion obtain the size of external load to complete to convert external load to the purpose that internal force measures by reading force cell reading the weight with the weight of the known weight of timing signal.
A kind of device for measuring force that external force measurement is converted into internal force measurement, including top board, base plate, removable elastic bearing bar and force cell, described removable elastic bearing bar be set to several and equably vertical distribution between described top board and base plate, the same side of described top board and base plate all has through hole, top board is corresponding with the through hole of base plate, the end of force cell is connected to the first screw rod, one end locking nut of the first screw rod is connected with the end of force cell, the other end of described first screw rod embeds in the through hole on base plate and fixes with two locking nuts, the top of described force cell is connected to the second screw rod, one end locking nut of the second screw rod is connected with the top of force cell, the other end of described second screw rod embeds in the through hole on top board and fixes with two locking nuts.
Further, the two ends of described removable elastic bearing bar are provided with external screw thread, top board is run through in one end of removable elastic bearing bar, the other end runs through base plate, and one end of removable elastic bearing bar is bolted in base plate with two with two other ends being bolted to top board elastic bearing bar interior, removable.
At test process China and foreign countries load action on removable elastic bearing bar, being actually is embedded in the structure of an interim processing by existing force cell, force cell is according to the stiffness relation distribution internal force with other removable elastic bearing bars, the internal force measurement of external force being changed into structural elements is measured, namely force cell only need to undertake a part for external load, by demarcating the range amplification coefficient that may determine that whole measurement apparatus；The rigidity of top board and base plate need to much larger than the rigidity of removable elastic bearing bar.
Compared with prior art, the method have the benefit that of the present invention
Present inventive concept is ingenious, make use of the principle of each stiffness of structural member distribution of internal force Main Basis under external load effect, the measurement of external load has been changed into the measurement of structural internal force, the rod member close with existing sensor rigidity is utilized to share external load cleverly, make the external force that existing sensor undertakes less than its range, so that the range increase that test system is overall, increase the use scope of existing force cell.This device fabrication and processing is simple, and method of testing is simple, easy to operate.
Accompanying drawing explanation
Fig. 1 is the sectional view of the present invention；
Fig. 2 is the top view of the present invention.
Detailed description of the invention
Below in conjunction with accompanying drawing and specific embodiment, the invention will be further described, in the illustrative examples of this invention and illustrate to be used for explaining the present invention, but not as a limitation of the invention.
External force measurement is converted into the force measuring method that internal force is measured by a kind of of the present invention, comprises the following steps:
1) external load treating measurement is substantially estimated, it is determined that measure the substantially range needed for external load；
2) force cell is embedded being used for measuring in the device for measuring force of external load so that external load is not directly all undertaken by force cell, and force cell only undertakes a part of internal force wherein changed；
3), after installation, adopt the weight of known weight or load that whole device for measuring force is demarcated；
4) external load is acted on device for measuring force, carry out ratiometric conversion obtain the size of external load to complete to convert external load to the purpose that internal force measures by reading force cell reading the weight with the weight of the known weight of timing signal.
Such as Fig. 1, shown in Fig. 2, give a kind of device for measuring force that external force measurement is converted into internal force measurement, including top board 2, base plate 1, removable elastic bearing bar 3 and force cell 5, described removable elastic bearing bar 3 be set to several and equably vertical distribution between described top board 2 and base plate 1, the same side of described top board 2 and base plate 1 all has through hole 9, the end of force cell 5 is connected to the first screw rod 7, one end of first screw rod 7 is connected with the end of locking nut 6 with force cell 5, the other end of described first screw rod 7 embeds in the through hole 9 on base plate 1 and is fixed on base plate 1 with two locking nuts 6, the top of described force cell 5 is connected to the second screw rod 8, one end of second screw rod 8 is connected with the top of locking nut 6 with force cell 5, the other end of described second screw rod 8 embeds in the through hole 9 on top board 2 and is fixed on top board 2 with two locking nuts 6.
For the ease of installing, change and regulate removable elastic bearing bar 3, the two ends of described removable elastic bearing bar 3 are provided with external screw thread, top board 2 is run through in one end of removable elastic bearing bar 3, the other end runs through base plate 1, and the other end that one end of removable elastic bearing bar 3 is fixed on top board 2 elastic bearing bar 3 interior, removable with two bolts 4 is fixed in base plate 1 with two bolts 4.By in Fig. 1 it can be seen that due in top board 2 and base plate 1 outside uniform be equipped with bolt 4, thus this device for measuring force can two-way carry, it is possible to meets pressure measurement or demand that survey is drawn.
When using the above-mentioned device for measuring force that external force measurement is converted into internal force measurement to carry out dynamometry:
1) external load treating measurement is substantially estimated, it is determined that measure the substantially range needed for external load；
2) on roof and floor, the removable elastic bearing bar that installation force cell and quantity are suitable for, it is ensured that the external load that force cell undertakes is less than the range of self；
3), after installation, undertaken loading the reading read on force cell by the weight of known weight and whole test system is demarcated by the mode recorded；
4) carry out the measurement of external load, carry out ratiometric conversion and obtain the size of external load by reading force cell reading the weight with the weight of the known weight of timing signal and measure to complete to convert external load to internal force.
When this device uses, owing to top board 2 and base plate 1 rigidity are bigger, removable elastic bearing bar 3 is close with force cell 5 rigidity, under outer load effect, top board 2 and base plate 1 produce certain relative displacement, now each removable elastic bearing bar 3 and force cell 5 deflection are identical, the external load that now each removable elastic bearing bar 3 undertakes is directly proportional to the rigidity of self, by demarcating the amplification coefficient that can obtain whole test system, actual measurement process can obtain the actual measured value of external load according to the product of force cell 5 measured value Yu amplification coefficient.
Technical scheme is not limited to the restriction of above-mentioned specific embodiment, every technology deformation made according to technical scheme, each falls within protection scope of the present invention.
Claims (3)
1. the force measuring method that external force measurement is converted into internal force measurement, it is characterised in that comprise the following steps:
1) external load treating measurement is estimated, it is determined that measure the range needed for external load；
2) force cell is embedded being used for measuring in the device for measuring force of external load so that external load is not directly all undertaken by force cell, and force cell only undertakes a part of internal force wherein changed；
3), after installation, adopt the weight of known weight or load that whole device for measuring force is demarcated；
4) external load is acted on device for measuring force, carry out ratiometric conversion obtain the size of external load to complete to convert external load to the purpose that internal force measures by reading force cell reading the weight with the weight of the known weight of timing signal.
2. the device for measuring force that external force measurement is converted into internal force measurement as claimed in claim 1, it is characterized in that, including top board (2), base plate (1), removable elastic bearing bar (3) and force cell (5), described removable elastic bearing bar (3) be set to several and equably vertical distribution between described top board (2) and base plate (1), the same side of described top board (2) and base plate (1) all has through hole (9), the end of force cell (5) is connected to the first screw rod (7), one end of first screw rod (7) end of locking nut (6) with force cell (5) is connected, the other end of described first screw rod (7) embeds in the through hole (9) on base plate (1) and fixes with two locking nuts (6), the top of described force cell (5) is connected to the second screw rod (8), the top of locking nut (6) with force cell (5), one end of second screw rod (8) is connected, the other end of described second screw rod (8) embeds in the through hole (9) on top board (2) and fixes with two locking nuts (6).
3. the device for measuring force that external force measurement is converted into internal force measurement according to claim 2, it is characterized in that: the two ends of described removable elastic bearing bar (3) are provided with external screw thread, top board (2) is run through in one end of removable elastic bearing bar (3), the other end runs through base plate (1), and the other end that one end of removable elastic bearing bar (3) is fixed on top board (2) elastic bearing bar (3) interior, removable with two bolts (4) is fixed in base plate (1) with two bolts (4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201610225394.XA CN105716746B (en) | 2016-04-12 | 2016-04-12 | A kind of force measuring method and its device for measuring force converting external force measurement to internal force measurement |
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| CN201610225394.XA CN105716746B (en) | 2016-04-12 | 2016-04-12 | A kind of force measuring method and its device for measuring force converting external force measurement to internal force measurement |
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| CN105716746B CN105716746B (en) | 2019-02-12 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109459124A (en) * | 2017-09-06 | 2019-03-12 | 梅特勒-托利多(常州)精密仪器有限公司 | Weighing system and method and storage medium |
| CN114354059A (en) * | 2021-12-24 | 2022-04-15 | 贵州航天凯山石油仪器有限公司 | Calibration method and device of non-bearing type load measuring instrument |
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| CN103776578A (en) * | 2014-02-20 | 2014-05-07 | 哈尔滨工业大学（威海） | Section internal force measurement sensor and calibration method |
| CN205483341U (en) * | 2016-04-12 | 2016-08-17 | 肖军 | Turn into internal force measuring measuring force device with external force measurement |
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2016
- 2016-04-12 CN CN201610225394.XA patent/CN105716746B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
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| DE4101732A1 (en) * | 1991-01-22 | 1992-07-23 | Kernforschungsz Karlsruhe | Force moment sensor - has elasto-mechanical coupling between plates using elastic rods between three pairs of bearing points per plate and carrying length dependent sensors |
| CN1828248A (en) * | 2006-04-18 | 2006-09-06 | 燕山大学 | Parellel 6-UPUR hexa-dimensional force-measuring platform |
| CN101149300A (en) * | 2007-11-01 | 2008-03-26 | 大连理工大学 | Piezoelectric six-dimensional large force sensor |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109459124A (en) * | 2017-09-06 | 2019-03-12 | 梅特勒-托利多(常州)精密仪器有限公司 | Weighing system and method and storage medium |
| CN114354059A (en) * | 2021-12-24 | 2022-04-15 | 贵州航天凯山石油仪器有限公司 | Calibration method and device of non-bearing type load measuring instrument |
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| CN105716746B (en) | 2019-02-12 |
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