CN108120549A - Volume range force sensor calibrating installation - Google Patents
Volume range force sensor calibrating installation Download PDFInfo
- Publication number
- CN108120549A CN108120549A CN201611088930.2A CN201611088930A CN108120549A CN 108120549 A CN108120549 A CN 108120549A CN 201611088930 A CN201611088930 A CN 201611088930A CN 108120549 A CN108120549 A CN 108120549A
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- 238000009434 installation Methods 0.000 title claims abstract description 11
- 230000003028 elevating effect Effects 0.000 claims abstract description 17
- 230000005540 biological transmission Effects 0.000 claims abstract description 13
- 230000005484 gravity Effects 0.000 claims description 18
- 238000006073 displacement reaction Methods 0.000 claims description 6
- NJPPVKZQTLUDBO-UHFFFAOYSA-N novaluron Chemical compound C1=C(Cl)C(OC(F)(F)C(OC(F)(F)F)F)=CC=C1NC(=O)NC(=O)C1=C(F)C=CC=C1F NJPPVKZQTLUDBO-UHFFFAOYSA-N 0.000 claims description 4
- 238000000034 method Methods 0.000 abstract description 4
- 230000000630 rising effect Effects 0.000 abstract description 2
- 238000005259 measurement Methods 0.000 description 6
- 238000002474 experimental method Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L25/00—Testing or calibrating of apparatus for measuring force, torque, work, mechanical power, or mechanical efficiency
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01G—WEIGHING
- G01G23/00—Auxiliary devices for weighing apparatus
- G01G23/01—Testing or calibrating of weighing apparatus
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Testing Of Devices, Machine Parts, Or Other Structures Thereof (AREA)
Abstract
The invention belongs to sensor calibration technique fields, and in particular to a kind of volume range force sensor calibrating installation.Turbine and worm transmission case is connected with the upper end of screw, screw passes through the left and right ends of dynamic crossbeam, the lower end of screw is connected with middle platform, turbine and worm transmission case is connected with DC servo motor and is arranged on upper mounting plate, upper mounting plate is connected by central post with middle platform, downside is equipped with cylinder plug system among upper mounting plate, hanging platform is arranged between upper mounting plate and middle platform, hanging platform is by hanging pull rod on middle platform, hanging platform lower is equipped with tested sensor, dynamic crossbeam is provided with below tested sensor, middle platform is connected by lower pillar stand with bottom plate, counterweight frame upper end is connected through middle platform with hanging pull rod, counterweight frame lower end is provided with standard test weight group, standard test weight group is arranged on pallet, elevating mechanism is provided with below pallet, elevating mechanism acts on rising or falling by the motor being fixed on bottom plate.
Description
Technical field
The invention belongs to sensor calibration technique fields, and in particular to a kind of volume range force sensor calibrating installation.
Background technology
Volume range force sensor is mainly used for the experiment of rocket engine thrust ground static and electronic scale.The sensor will
The elastic element of two ranges of size contacts to form overall structure, has gap between small-range elastic element and pedestal, can meet big
Thrust and the requirement of low thrust measurement.High thrust generally differs dozens or even hundreds of times with the measurement range that low thrust measures, because
The maximum point of this measurement is even thousands of times of the hundred times of minimum electricity, and current force standard machines mainly has Dead Weigh Force Standard Machine,
Lever-type Standard Force Measuring Machine Hydraulic Standard Force Meter and superposing type force standard machine, the maximum point of measurement is usually the 10 of smallest point
Times, the wider force standard machines maximum point of measurement range is usually 100 times of smallest point, therefore same equipment the same space without
Method calibrates more two range force sensors, and current way is that the wide range of volume range force sensor and small-range section are used respectively
Different power standard set-ups are calibrated, and on the one hand this way adds artificial disturbing factor, on the other hand its calibration side
Method and behaviour in service are inconsistent, reduce further the accuracy of volume range force sensor.Therefore, current technology can not meet
Rocket engine thrust ground experiment and electronic scale need the needs of volume range force sensor calibration to be used.
The content of the invention
It is an object of the invention to provide a kind of volume range force sensor calibrating installations, solve current dead weight type safe power standard
It is accurate that machine, Lever-type Standard Force Measuring Machine, Hydraulic Standard Force Meter and superposing type force standard machine can not be carried out in same force standard machines
The problem of calibration.
In order to achieve the above objectives, the technical solution used in the present invention is：
A kind of volume range force sensor calibrating installation, turbine and worm transmission case are connected with the upper end of screw, and screw passes through dynamic
The left and right ends of crossbeam, the lower end of screw are connected with middle platform, and turbine and worm transmission case is connected and sets with DC servo motor
On upper mounting plate, upper mounting plate is connected by central post with middle platform, and downside is equipped with cylinder plug system, cylinder plug system among upper mounting plate
System includes oil inlet, oil cylinder and piston, and cylinder pedestal is fixed on the centre of upper mounting plate, and piston connects with wide range standard transducer
It connects, hanging platform is arranged between upper mounting plate and middle platform, and for hanging platform by hanging pull rod on middle platform, hanging is flat
Platform lower part is equipped with tested sensor, and dynamic crossbeam is provided with below tested sensor, and dynamic crossbeam can be moved up and down along hanging pull rod,
Middle platform is connected by lower pillar stand with bottom plate, and counterweight frame upper end is connected through middle platform with hanging pull rod, and counterweight frame lower end is set
There is standard test weight group, standard test weight group is arranged on pallet, is provided with elevating mechanism below pallet, elevating mechanism is by being fixed on
Motor on bottom plate is acted on and risen or fallen.
Turbine and worm transmission case drives dynamic cross beam movement under the action of DC servo motor by screw, by tested volume
Range force sensor is placed symmetrically at tested sensor, continues to move up dynamic crossbeam until hanging pull rod self gravitation is complete
It acts on tested sensor, the oil inlet of cylinder plug system refuels to oil cylinder, and piston pushes wide range standard transducer to moving down
It is dynamic, it is contacted until with hanging platform upper surface, oiling is continued to cylinder plug system, the pressure that cylinder plug system generates at this time is applied to greatly
By hanging platform action to tested sensor while range standard transducer, by comparing tested sensor and wide range
The calibration to being tested sensor wide range section is completed in the output of standard transducer；After completing calibration, cylinder plug system emptying, at this time greatly
Range standard transducer and hanging platform upper surface depart from, and start motor and elevating mechanism and move down, and pallet is to moving down at this time
Dynamic, after mobile certain displacement, the first layer Weight gravity of the standard test weight group on pallet will be applied on counterweight frame, which leads to
It crosses counterweight frame to be transferred on tested sensor, the force value that counterweight generates is given to tested sensor small-range；Start motor and
Elevating mechanism continues to move down, then after moving certain displacement, the second layer Weight gravity of the standard test weight group on pallet will be made
It uses on counterweight frame, the gravity that the gravity and first layer counterweight generate is transferred to by counterweight frame on tested sensor simultaneously, after
Continuous startup motor and elevating mechanism are moved downwardly until that the gravity that the tenth layer of counterweight generates also is applied on tested sensor, utilize
The gravity that counterweight occurs completes the calibration to being tested sensor small-range section as standard force value.
Having the beneficial effect that acquired by the present invention：
When being calibrated using the present invention, small-range (100N~10kN) part is loaded using counterweight, is loaded when needs
When power is more than 10kN, using the pressure that hydraulic cylinder generates as power source, the signal of standard transducer is as feedback, according to by school
The alignment requirements of sensor is in computer and control software setting force-detecting position, and computer and control software are according to control algolithm to holding
Units send work order, i.e., add and subtract oil to oil cylinder by Serve Motor Control servo valve, until the power that oil cylinder generates reaches
The force-detecting position of setting, and keep compared with high stable state, force value is made to keep stablizing.The power generated using oil cylinder reappears standard dynamometer
Standard force value, achieve the purpose that corrected sensor calibrate.
The present invention is loaded when calibrating small-range (100N~10kN) part of volume range force sensor using counterweight, when
When needing the power loaded more than 10kN, the pressure generated using hydraulic cylinder reaches the measurement range of the device as power source
100N~1000kN, maximum point is 10000 times of smallest point, and is in the range of class of accuracy (100N~10kN)
It is 0.02% in the range of 0.002%, 10kN~1000kN, solving the prior art can not be to volume range force sensor at same
Force standard machines carries out the problem of accurate alignment.
Description of the drawings
Fig. 1 is volume range force sensor calibrating installation structure chart；
In figure：1st, turbine and worm transmission case；2nd, DC servo motor；3rd, upper mounting plate；4th, cylinder plug system；5th, wide range standard
Sensor；6th, platform is hung；7th, it is tested sensor (installation site)；8th, crossbeam is moved；9th, central post；10th, pull rod is hung；11st, in
Platform；12nd, lower pillar stand；13rd, counterweight frame；14th, standard test weight group；15th, pallet；16th, motor；17th, elevating mechanism；18th, bottom plate.
Specific embodiment
The present invention is described in detail with specific embodiment below in conjunction with the accompanying drawings.
As shown in Figure 1, volume range force sensor calibrating installation of the present invention includes turbine and worm transmission case 1, direct current is watched
Take motor 2, upper mounting plate 3, cylinder plug system 4, wide range standard transducer 5, hanging platform 6, tested sensor 7, dynamic crossbeam 8, in
Column 9, hanging pull rod 10, middle platform 11, lower pillar stand 12, counterweight frame 13, standard test weight group 14, pallet 15, motor 16, elevator
Structure 17, bottom plate 18；
Turbine and worm transmission case 1 is connected with the upper end of screw, and screw passes through the left and right ends of dynamic crossbeam 8, the lower end of screw
It is connected with middle platform 11, turbine and worm transmission case 1 is connected with DC servo motor 2 and is arranged on upper mounting plate 3, and upper mounting plate 3 is logical
Central post 9 is crossed to be connected with middle platform 11, downside is equipped with cylinder plug system 4 among upper mounting plate 3, cylinder plug system 4 include oil inlet,
Oil cylinder and piston, cylinder pedestal are bolted on the centre of upper mounting plate 3, and wherein piston connects with wide range standard transducer 5
It connects, hanging platform 6 is arranged between upper mounting plate 3 and middle platform 11, and hanging platform 6 is by hanging pull rod 10 mounted on middle platform 11
On, hanging platform 6 lower part is equipped with tested sensor 7, and tested 7 lower section of sensor is provided with dynamic crossbeam 8, and dynamic crossbeam 8 can be along hanging
Pull rod 10 is hung to move up and down, middle platform 11 is connected by lower pillar stand 12 with bottom plate 18,13 upper end of counterweight frame through middle platform 11 and
Hanging pull rod 10 connects, and 13 lower end of counterweight frame is provided with standard test weight group 14, and standard test weight group 14 is arranged on pallet 15, pallet
15 lower sections are provided with elevating mechanism 17, and elevating mechanism 17 acts on rising or falling by the motor 16 being fixed on bottom plate 18.
First, turbine and worm transmission case 1 drives dynamic crossbeam 8 to move under the action of DC servo motor 2 by screw, will
Tested volume range force sensor is placed symmetrically in shown in Fig. 1 and is tested at sensor 7, continues to move up dynamic crossbeam 8 until hanging
It hangs 10 self gravitation of pull rod to act on completely on tested sensor 7, the oil inlet of cylinder plug system 4 refuels to oil cylinder, and piston pushes
Wide range standard transducer 5 moves down, and is contacted until with 6 upper surface of hanging platform, continues oiling to cylinder plug system 4, at this time
While the pressure that cylinder plug system 4 generates is applied to wide range standard transducer 5 tested multrirange is applied to by hanging platform 6
On force snesor 7, complete to pass tested multrirange power by comparing the output of tested sensor 7 and wide range standard transducer 5
The calibration of 7 wide range section of sensor.It completes after calibrating, 4 emptying of cylinder plug system, at this time wide range standard transducer 5 and hanging platform 6
Upper surface departs from, and starts motor 16 and elevating mechanism 17 moves down, and pallet 15 moves down at this time, after mobile certain displacement,
The first layer Weight gravity of standard test weight group 14 on pallet 15 will be applied on counterweight frame 13, which is passed by counterweight frame 13
It is delivered on tested sensor 7, the force value that counterweight generates is given to tested 7 small-range of sensor.Start motor 16 and elevator
Structure 17 continues to move down, then after moving certain displacement, the second layer Weight gravity of the standard test weight group 14 on pallet 15 will be made
It uses on counterweight frame 13, the gravity that the gravity and first layer counterweight generate is transferred to tested sensor 7 by counterweight frame 13 simultaneously
On, continue to start motor 16 and elevating mechanism 17 is moved downwardly until that the gravity that the tenth layer of counterweight generates also is applied to tested sensing
On device 7, the calibration to volume range force sensor small-range section is completed by the use of the gravity that counterweight occurs as standard force value.
Claims (2)
1. a kind of volume range force sensor calibrating installation, it is characterised in that：The upper end of turbine and worm transmission case (1) and screw connects
Connect, screw passes through the left and right ends of dynamic crossbeam (8), the lower end of screw and middle platform (11) connection, turbine and worm transmission case (1) with
DC servo motor (2) is connected and is arranged on upper mounting plate (3), and upper mounting plate (3) is connected by central post (9) and middle platform (11)
It connects, downside is equipped with cylinder plug system (4) among upper mounting plate (3), and cylinder plug system (4) includes oil inlet, oil cylinder and piston, oil cylinder
Pedestal is fixed on the centre of upper mounting plate (3), and piston is connected with wide range standard transducer (5), and hanging platform (6) is arranged on flat
Between platform (3) and middle platform (11), hanging platform (6) hangs platform by hanging pull rod (10) on middle platform (11)
(6) lower part is equipped with tested sensor (7), is provided with dynamic crossbeam (8) below tested sensor (7), moving crossbeam (8) can be along hanging
Pull rod (10) moves up and down, and middle platform (11) is connected by lower pillar stand (12) with bottom plate (18), during counterweight frame (13) upper end passes through
Platform (11) is connected with hanging pull rod (10), and counterweight frame (13) lower end is provided with standard test weight group (14), standard test weight group (14)
It is arranged on pallet (15), is provided with elevating mechanism (17) below pallet (15), elevating mechanism (17) is by being fixed on bottom plate
(18) motor (16) on is acted on and risen or fallen.
2. volume range force sensor calibrating installation according to claim 1, it is characterised in that：Turbine and worm transmission case (1)
Drive dynamic crossbeam (8) mobile by screw under the action of DC servo motor (2), by tested volume range force sensor symmetrically
It is positioned at tested sensor (7), continues to move up dynamic crossbeam (8) until hanging pull rod (10) self gravitation acts on completely
On tested sensor (7), the oil inlet of cylinder plug system (4) refuels to oil cylinder, and it is downward that piston pushes wide range standard transducer (5)
It is mobile, it is contacted until with hanging platform (6) upper surface, oiling is continued to cylinder plug system (4), cylinder plug system (4) generates at this time
It is applied on tested sensor (7), passed through by hanging platform (6) while pressure is applied to wide range standard transducer (5)
School to being tested sensor (7) wide range section is completed in the output for comparing tested sensor (7) and wide range standard transducer (5)
It is accurate；After completing calibration, cylinder plug system (4) emptying, wide range standard transducer (5) and the disengaging of hanging platform (6) upper surface at this time,
Starting motor (16) and elevating mechanism (17) moves down, pallet (15) moves down at this time, after mobile certain displacement, pallet
(15) the first layer Weight gravity of the standard test weight group (14) on will be applied on counterweight frame (13), which passes through counterweight frame
(13) it is transferred on tested sensor (7), the force value that counterweight generates is given to tested sensor (7) small-range；Start motor
(16) and elevating mechanism (17) continues to move down, then after moving certain displacement, the standard test weight group (14) on pallet (15)
Second layer Weight gravity will be applied on counterweight frame (13), and the gravity that the gravity and first layer counterweight generate passes through counterweight frame simultaneously
(13) it is transferred on tested sensor (7), continues to start motor (16) and elevating mechanism (17) is moved downwardly until the tenth layer of weight
The gravity that code generates also is applied on tested sensor (7), is completed by the use of the gravity that counterweight occurs as standard force value to tested
The calibration of sensor (7) small-range section.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611088930.2A CN108120549B (en) | 2016-11-30 | 2016-11-30 | Multi-range force sensor calibration device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611088930.2A CN108120549B (en) | 2016-11-30 | 2016-11-30 | Multi-range force sensor calibration device |
Publications (2)
| Publication Number | Publication Date |
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| CN108120549A true CN108120549A (en) | 2018-06-05 |
| CN108120549B CN108120549B (en) | 2023-12-08 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201611088930.2A Active CN108120549B (en) | 2016-11-30 | 2016-11-30 | Multi-range force sensor calibration device |
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109506832A (en) * | 2018-10-19 | 2019-03-22 | 陕西航空电气有限责任公司 | Working in double modes dynamometer calibrating installation |
| CN110426107A (en) * | 2019-09-09 | 2019-11-08 | 苏州钮曼精密机电科技有限公司 | A kind of weighing device and weighing system |
| CN110763321A (en) * | 2019-10-18 | 2020-02-07 | 福建省计量科学研究院（福建省眼镜质量检验站） | Combined type verification method for electronic hanging scale |
| CN111174962A (en) * | 2020-01-08 | 2020-05-19 | 哈尔滨工业大学 | Capacitance type three-dimensional force sensor with adjustable measuring range |
| CN111998994A (en) * | 2020-05-19 | 2020-11-27 | 河南省计量科学研究院 | Multi-range force standard device |
| CN112903185A (en) * | 2021-01-22 | 2021-06-04 | 上海工业自动化仪表研究院有限公司 | Ten thousand tons of level force standard machines |
| CN114459675A (en) * | 2021-12-30 | 2022-05-10 | 中国航空工业集团公司北京长城计量测试技术研究所 | Large-amplitude sine force generating device |
| CN114754921A (en) * | 2021-01-08 | 2022-07-15 | 广州汽车集团股份有限公司 | Force sensor checking device and force sensor checking method |
| CN114858346A (en) * | 2022-06-01 | 2022-08-05 | 中国烟草总公司郑州烟草研究院 | Calibration device and calibration method for hanging frame type micro dynamometer |
| CN114858345A (en) * | 2022-06-01 | 2022-08-05 | 中国烟草总公司郑州烟草研究院 | Calibration device and calibration method for tray type micro dynamometer |
| CN115468702A (en) * | 2022-10-21 | 2022-12-13 | 中储恒科物联网系统有限公司 | Creep performance testing system, method and device |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101458142A (en) * | 2008-11-13 | 2009-06-17 | 陶泽成 | Dynamometer measurement standard apparatus |
| CN201429458Y (en) * | 2009-07-02 | 2010-03-24 | 中国测试技术研究院 | Dead weight type force standard machine of multiple measuring ranges and small force Values |
| CN102928156A (en) * | 2012-10-26 | 2013-02-13 | 浙江中烟工业有限责任公司 | Air floatation dead load type mini-type calibrating device for force measurement sensor |
| CN204330208U (en) * | 2014-12-15 | 2015-05-13 | 苏州龙盛测试设备有限公司 | For detecting the force standard machines of pull and push dynamometer |
| CN206339329U (en) * | 2016-11-30 | 2017-07-18 | 北京航天计量测试技术研究所 | Volume range force sensor calibrating installation |
-
2016
- 2016-11-30 CN CN201611088930.2A patent/CN108120549B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101458142A (en) * | 2008-11-13 | 2009-06-17 | 陶泽成 | Dynamometer measurement standard apparatus |
| CN201429458Y (en) * | 2009-07-02 | 2010-03-24 | 中国测试技术研究院 | Dead weight type force standard machine of multiple measuring ranges and small force Values |
| CN102928156A (en) * | 2012-10-26 | 2013-02-13 | 浙江中烟工业有限责任公司 | Air floatation dead load type mini-type calibrating device for force measurement sensor |
| CN204330208U (en) * | 2014-12-15 | 2015-05-13 | 苏州龙盛测试设备有限公司 | For detecting the force standard machines of pull and push dynamometer |
| CN206339329U (en) * | 2016-11-30 | 2017-07-18 | 北京航天计量测试技术研究所 | Volume range force sensor calibrating installation |
Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109506832A (en) * | 2018-10-19 | 2019-03-22 | 陕西航空电气有限责任公司 | Working in double modes dynamometer calibrating installation |
| CN110426107A (en) * | 2019-09-09 | 2019-11-08 | 苏州钮曼精密机电科技有限公司 | A kind of weighing device and weighing system |
| CN110763321B (en) * | 2019-10-18 | 2022-03-15 | 福建省计量科学研究院（福建省眼镜质量检验站） | Combined type verification method for electronic hanging scale |
| CN110763321A (en) * | 2019-10-18 | 2020-02-07 | 福建省计量科学研究院（福建省眼镜质量检验站） | Combined type verification method for electronic hanging scale |
| CN111174962A (en) * | 2020-01-08 | 2020-05-19 | 哈尔滨工业大学 | Capacitance type three-dimensional force sensor with adjustable measuring range |
| CN111998994A (en) * | 2020-05-19 | 2020-11-27 | 河南省计量科学研究院 | Multi-range force standard device |
| CN114754921A (en) * | 2021-01-08 | 2022-07-15 | 广州汽车集团股份有限公司 | Force sensor checking device and force sensor checking method |
| CN114754921B (en) * | 2021-01-08 | 2023-11-17 | 广州汽车集团股份有限公司 | Force sensor checking device and force sensor checking method |
| CN112903185A (en) * | 2021-01-22 | 2021-06-04 | 上海工业自动化仪表研究院有限公司 | Ten thousand tons of level force standard machines |
| CN112903185B (en) * | 2021-01-22 | 2022-06-10 | 上海工业自动化仪表研究院有限公司 | Ten thousand tons of level force standard machines |
| CN114459675A (en) * | 2021-12-30 | 2022-05-10 | 中国航空工业集团公司北京长城计量测试技术研究所 | Large-amplitude sine force generating device |
| CN114858346A (en) * | 2022-06-01 | 2022-08-05 | 中国烟草总公司郑州烟草研究院 | Calibration device and calibration method for hanging frame type micro dynamometer |
| CN114858345A (en) * | 2022-06-01 | 2022-08-05 | 中国烟草总公司郑州烟草研究院 | Calibration device and calibration method for tray type micro dynamometer |
| CN115468702A (en) * | 2022-10-21 | 2022-12-13 | 中储恒科物联网系统有限公司 | Creep performance testing system, method and device |
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