CN105333997B - Gravity center measurement instrument and center of gravity measurement method - Google Patents
Gravity center measurement instrument and center of gravity measurement method Download PDFInfo
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- CN105333997B CN105333997B CN201510512251.2A CN201510512251A CN105333997B CN 105333997 B CN105333997 B CN 105333997B CN 201510512251 A CN201510512251 A CN 201510512251A CN 105333997 B CN105333997 B CN 105333997B
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- gravity
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- pressure sensor
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Abstract
The present invention provides a kind of gravity center measurement instrument and its measuring method, including horizontal stand, bearing, processing unit, rocking bar, support bar, differential head, objective box, level meter and a pair of binding nuts.Bearing is fixed on horizontal stand, processing unit is fixed on horizontal stand and comprising pressure sensor and has data processing function, rocking bar is rotatablely connected with bearing, differential head is arranged at support boom end and vertically moved above pressure sensor, objective box is fixed on rocking bar and carries determinand, and level meter is arranged on support bar.The present invention is simple in construction, easily operated, can measure the position of centre of gravity of some complex contours or the object of Mass Distribution inequality.
Description
Technical field
The present invention relates to measuring apparatus technology, particularly a kind of gravity center measurement instrument and center of gravity measurement method.
Background technology
Center of gravity, be in gravitational field, when object is in any orientation the gravity of its all particle make a concerted effort all pass through that
A bit.Therefore, the center of gravity of object is to determine, unrelated with the locus of object.No matter in engineering in practice, or daily life
In work, determine that the position of object center of gravity all has very important significance.
Generally, rule and the center of gravity of the object of even density is its geometric center, can according to the size and dimension of object
It is easily obtained the center of gravity of object.But most of object can be in irregular shape, be some profiles mostly especially in engineering
The uneven object of complicated or Mass Distribution and equipment, the mode that geometric center calculates center of gravity are no longer applicable.
The content of the invention
It is an object of the invention to provide a kind of gravity center measurement instrument and center of gravity measurement method, the measuring instrument are simple in construction, easy
In operation, the position of centre of gravity of some complex contours or the uneven object of Mass Distribution can be measured.
A kind of gravity center measurement instrument, including horizontal stand, bearing, processing unit, rocking bar, support bar, objective box, differential head, water
Level.Bearing is fixed on horizontal stand, and processing unit is fixed on horizontal stand and comprising pressure sensor and has data processing
Function, rocking bar are rotatablely connected with bearing, and differential head is arranged at support boom end and vertically moved above pressure sensor
Dynamic, objective box is fixed on rocking bar and carries determinand, and level meter is arranged on support bar.
Using above-mentioned gravity center measurement instrument, processing unit also includes：Mode selection module, memory module, zero setting module, fortune
Calculate module, analog-to-digital conversion module, display screen.Mode selection module is used to select the pattern one of measurement determinand gravity or selection to obtain
Obtain the pattern two of determinand center of gravity；Analog-to-digital conversion module, the Parameter Switch for pressure sensor 601 to be obtained are believed for numeral
Number；Memory module is used to store the data of pressure sensor measurement and the size of gravity center measurement instrument；Zero setting module is used for rocking bar
Boom end is adjusted during in level put on the pressure of pressure sensor and be set to zero；It is to be measured that computing module is based on equalising torque acquisition
The center of gravity of thing；Display screen is used to show the data of pressure sensor measurement and the data that computing module calculates.
The method that center of gravity is measured using above-mentioned gravity center measurement instrument, is comprised the following steps：
The gravity of determinand is obtained using processor；
Determine three reference planes of determinand and the reference plane of objective box；
The pressure that regulation boom end puts on pressure sensor when setting rocking bar is in horizontal is zero；
Three reference planes of determinand are placed in the reference plane of objective box respectively, determinand weight is obtained based on equalising torque
Vertical range s of the heart away from three reference planes1,s2,s3；
It is respectively parallel to three reference planes of determinand and meets s apart from corresponding reference plane1,s2,s3Three planes intersection point
For the center of gravity of determinand.
The present invention compared with prior art, has advantages below：(1) test device each several part component structural is simple, easily
It is mobile, easy to adjust in processing；(2) processing unit is calculated based on principle of moment balance measurement data, can directly be obtained
To result；(3) object that shape is complicated or Mass Distribution is uneven is applicable.
The present invention is described further with reference to Figure of description.
Brief description of the drawings
Fig. 1 is overall structure diagram of the present invention, and wherein Fig. 1 (a) is front view, and Fig. 1 (b) is top view.
Fig. 2 is the partial schematic diagram of processing unit of the present invention.
Fig. 3 is processing unit theory diagram of the present invention.
Embodiment
With reference to Fig. 1 (a) (b), a kind of gravity center measurement instrument, including horizontal stand 1, bearing 2, processing unit 6, rocking bar 8, differential head
5th, support bar 7, objective box 3, level meter 4.The horizontal stand 1 is used for the other parts for carrying gravity center measurement instrument, its modes of emplacement
With plane-parallel；The bearing 2 is fixed on horizontal stand 1；The processing unit 6 is fixed on horizontal stand 1 and comprising pressure
Sensor 601 simultaneously has data processing function, for calculating determinand position of centre of gravity；The tail end of rocking bar 8 turns with the upper end of bearing 2
Dynamic connection；The differential head is arranged at the leading section of axle 10 and vertically moved above pressure sensor, during work, differential
First 5 end is pressed on pressure sensor 601；The objective box 3 is fixed on axle 10 and carries determinand；The level
Instrument 4 is arranged on rocking bar 8, for measuring whether rocking bar 8 is in horizontality.
The processing unit 6 also includes：Mode selection module, analog-to-digital conversion module, memory module, zero setting module, computing
Module, display screen.Mode selection module is used to select the pattern one of measurement determinand gravity or selection to obtain determinand center of gravity
Pattern two；Analog-to-digital conversion module, the Parameter Switch for pressure sensor 601 to be obtained are data signal；Memory module is used for
Store the data of the measurement of pressure sensor 601 and the size of gravity center measurement instrument；Zero setting module is micro- when being used to rocking bar 8 being in horizontal
5 ends put on the pressure of pressure sensor 601 and are set to zero separately；Computing module obtains the weight of determinand based on equalising torque
The heart；Display screen is used to show the data that pressure sensor 601 measures and the data that computing module calculates.
The memory module stores following parameter：(1) the determinand gravity G that pressure sensor 601 measures, (2) determinand
It is placed in the pressure N that first 5 end of differential in objective box 3 puts on pressure sensor 601i, (3) pressure sensor and rocking bar 8 are with propping up
Seat 2, which is rotatablely connected, is in projector distance L on horizontal stand 1, to objective box 3 close to this turn at (4) rocking bar 8 and the rotation connection of bearing 2
The vertical range l of dynamic junction one side box wall0。
Computing module includes multiplier, divider, subtracter.Multiplier, for NiIt is multiplied with L；Divider, for NiAnd L
Product be divided by with G；Subtracter, for NiWith L product and G business and l0Make the difference.
A kind of object center of gravity measurement method, comprises the following steps：
Step S101, the pattern one of processing unit 6 being selected, pressure sensor 601 measures the gravity G of determinand,
Step S102, removes determinand, differential first 5 is installed on to the end of rocking bar 8, and the end of differential first 5 is butted on
On the pressure sensor 601 of processing unit 6, regulation differential first 5 moves up and down until level meter 4 shows that rocking bar 8 is in horizontal
State, it is zero to set the pressure that now first 5 end of differential puts on pressure sensor 601 of rocking bar 8；
Step S103, determines three reference planes of determinand and the reference plane of objective box 3, and optimal case is to choose determinand
Three reference planes are mutually perpendicular to；
Step S104, the reference plane A of determinand is placed in the reference plane of objective box 3, obtained based on equalising torque to be measured
Thing distance of centre of gravity reference plane A vertical range s1；
Step S105, determinand is taken out, and the reference plane B of determinand is placed in the reference plane of objective box 3, in torque
Balance obtains determinand distance of centre of gravity reference plane B vertical range s2；
Step S106, determinand is taken out, and the reference plane C of determinand is placed in the reference plane of objective box 3, in torque
Balance obtains determinand distance of centre of gravity reference plane C vertical range s3；
Step S107, calculates the center of gravity of determinand, that is, is respectively parallel to three reference planes of determinand and apart from corresponding benchmark
Face meets s1,s2,s3Three planes intersection point be determinand center of gravity.
In step S104, S105, S106, using equalising torque obtain center of gravity to each reference plane of determinand distance,
Including：
Step S201, rocking bar 8 is made with being T at the rotation connection of bearing 2,
Step S202, obtain distance of T to the determinand center of gravity D places perpendicular to the plane of reference plane
Step S203, obtain distance ss of the determinand center of gravity D away from each reference planei=li-l0；
The i=1,2,3 be respectively reference plane index value, NiWhen being placed in for determinand difference reference plane on objective box 3
First 5 end of differential puts on the pressure of pressure sensor, and G is the gravity that determinand uses processor 6 to obtain, and L is pressure sensing
Device and rocking bar 8 are in projector distance on horizontal stand 1, l with the rotation connection of bearing 20For T to objective box 3 hanging down close to T one end box wall
Straight distance.
Embodiment one
A kind of gravity center measurement instrument, including horizontal stand 1, bearing 2, processing unit 6, rocking bar 8, adjusting rod 5, objective box 3, level
Instrument 4.The adjusting rod 5 is differential head.The bottom of the bearing 2 is fixedly connected by screw with horizontal stand 1, and the upper end of bearing 2 is set
Put U-type groove.The bottom of the processing unit 6 is fixedly connected by screw with horizontal stand.The tail end of rocking bar 8 is set in the horizontal direction
An axis hole is put, rotating shaft 10 is rotatablely connected through axis hole and the upper end U-type groove wall of bearing 2 by bearing, and rocking bar 8 is at rotating shaft 10
External screw thread nearby is provided with, rocking bar 8 and rotating shaft 10 are fastened by two nuts.The differential head is fixedly connected with the front end of rocking bar 8.Carry
Thing box is fixed on rocking bar 8 by screw.Level meter is fixed on rocking bar 8.
With reference to Fig. 2, processing unit 6 includes the pallet of carrying determinand and differential head, and sets display screen and function button
Functional areas.The pressure sensor 601 is located on pallet.The button of functional areas includes " storage key ", " mode key ", " zero setting
Key ", " on ＆ off switch ".With reference to Fig. 3, processing unit 6 also includes mode selection module, analog-to-digital conversion module 603, zero setting module, fortune
Calculate module 605, display screen 606.The function of the mode selection module and zero setting module is integrated in a single-chip microcomputer 604, in addition
The single-chip microcomputer can also complete the function of controlling memory module 602 to store parameter, and wherein single-chip microcomputer should include 4 inputs, point
The level signal transmitted when not pressed in response to " storage key ", " mode key ", " zero setting key ", " on ＆ off switch ", single-chip microcomputer 604 it is defeated
Go out end to be connected with memory module 602, computing module 605, display screen 606 respectively；When user presses " on ＆ off switch ", single-chip microcomputer
604 start working；When user presses " storage key ", single-chip microcomputer 604 controls the data storage of memory module 602；When user presses
When " mode key ", single-chip microcomputer control memory module 602 sends data to computing module 605 or display screen, and control computing mould
Block 605 starts computing；When user presses " zero setting key ", display screen display numeral is reset.
The memory module stores following parameter：(1) the determinand gravity G that pressure sensor 601 measures, (2) determinand
It is placed in the pressure N that the end of adjusting rod 5 in objective box 3 puts on pressure sensor 601i, the length L of (3) rocking bar 8, (4) rocking bar 8
With at the rotation connection of bearing 2 to the vertical range l of one side box wall at the rotation connection of objective box 30。
Computing module includes multiplier, divider, subtracter.Multiplier, for NiIt is multiplied with L；Divider, for NiAnd L
Product be divided by with G；Subtracter, for NiWith L product and G business and l0Make the difference.
Embodiment two
The objective box 3 is cuboid, set in its box body close to pillar 2 side wall on the basis of face.
Determinand is by taking cuboid as an example, its Density inhomogeneity, thus its center of gravity not at geometric center at, set it is to be measured
Face on the basis of orthogonal three faces of thing.
The weight of determinand is first measured, horizontality is in regulation rocking bar 8, then leans against the reference plane of determinand first
In the reference plane of objective box 3, first group of data is measured；Then determinand is taken out and rotated, the second reference plane is leaned against into the base of objective box 3
On quasi- face, second group of data is measured；Then determinand is taken out and rotated, the 3rd reference plane is leaned against in the reference plane of objective box 3, surveyed
Obtain the 3rd group of data.
S is calculated based on principle of moment balance in all data1,s2,s3, it is respectively parallel to three benchmark of determinand
Face and meet s apart from corresponding reference plane1,s2,s3Three planes intersection point be determinand center of gravity.
Claims (7)
- A kind of 1. gravity center measurement instrument, it is characterised in that including：One horizontal stand (1),One bearing (2) being fixed on horizontal stand (1),One is fixed on the processing unit (6) on horizontal stand (1) and comprising pressure sensor and with data processing function,One rocking bar (8) being rotatablely connected with bearing (2),A pair of binding nuts (9) clamp rocking bar (8), prevent its wobble effects precision,One is fixed on rocking bar (8) and carries the objective box (3) of determinand,One support bar (7) being fixed on objective box (3),One is arranged at the level meter (4) on support bar (7), andThe one differential head (5) for being arranged at support bar (7) end and vertically being moved above pressure sensor.
- 2. gravity center measurement instrument according to claim 1, it is characterised in that adjusting differential head (5) and observing level meter (4) makes Rocking bar (8) and objective box (3) are horizontal.
- 3. gravity center measurement instrument according to claim 1, it is characterised in that the processing unit (6) also includes：Mode selection module, pattern one or selection for selecting measurement determinand gravity obtain the pattern two of determinand center of gravity；Analog-to-digital conversion module, the Parameter Switch for pressure sensor (601) to be obtained are data signal；Memory module, for storing the data of pressure sensor measurement and the size of gravity center measurement instrument；Zero setting module, differential head (5) end puts on the pressure of pressure sensor and is set to during for rocking bar (8) to be in into horizontal Zero；Computing module, the center of gravity of determinand is obtained based on equalising torque；Display screen, the data that data and computing module for showing pressure sensor measurement calculate.
- 4. gravity center measurement instrument according to claim 3, it is characterised in that the memory module stores following parameter：The determinand gravity G of sensor measurement,Determinand is placed in the pressure N that differential head (5) end in objective box (3) puts on sensori,Pressure sensor and rocking bar (8) are in projector distance L on horizontal stand (1) with bearing (2) rotation connection,Rocking bar (8) and the vertical range l at bearing (2) rotation connection to objective box (3) close to one side box wall at the rotation connection0。
- 5. gravity center measurement instrument according to claim 4, it is characterised in that computing module includes：Multiplier, for NiIt is multiplied with L,Divider, for NiIt is divided by with L product with G,Subtracter, for NiWith L product and G business and l0Make the difference.
- 6. using the method for the gravity center measurement instrument measurement object center of gravity described in any of the above-described claim, it is characterised in that including：The gravity of determinand is obtained using processing unit (6),Three reference planes of determinand and the reference plane of objective box (3) are determined,The pressure that differential head (5) end puts on pressure sensor when setting rocking bar (8) is in horizontal is zero,Three reference planes of determinand are placed in the reference plane of objective box (3) respectively, determinand weight is obtained based on equalising torque Vertical range s of the heart away from three reference planes1,s2,s3,It is respectively parallel to three reference planes of determinand and meets s apart from corresponding reference plane1,s2,s3Three planes intersection point to treat Survey the center of gravity of thing.
- 7. according to the method for claim 6, it is characterised in that center of gravity is obtained to each benchmark of determinand using equalising torque The distance in face, including：Rocking bar (8) is made with being T at bearing (2) rotation connection,Obtain distance of T to the determinand center of gravity D places perpendicular to the plane of reference planeObtain distance ss of the determinand center of gravity D away from each reference planei=li-l0；The i=1,2,3 be respectively reference plane index value, NiDifferential when being placed in for determinand difference reference plane on objective box (3) Head (5) end puts on the pressure of pressure sensor, and G is the gravity that determinand uses processing unit (6) to obtain, and L passes for pressure Sensor and rocking bar (8) are in projector distance on horizontal stand (1), l with bearing (2) rotation connection0It is the close T mono- of T to objective box (3) Hold the vertical range of box wall.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510512251.2A CN105333997B (en) | 2015-08-19 | 2015-08-19 | Gravity center measurement instrument and center of gravity measurement method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510512251.2A CN105333997B (en) | 2015-08-19 | 2015-08-19 | Gravity center measurement instrument and center of gravity measurement method |
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| CN105333997A CN105333997A (en) | 2016-02-17 |
| CN105333997B true CN105333997B (en) | 2018-01-23 |
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Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106979843B (en) * | 2016-01-15 | 2019-08-27 | 中国航发常州兰翔机械有限责任公司 | A kind of aero-engine center of gravity detection method |
| CN106044566A (en) * | 2016-07-14 | 2016-10-26 | 中国华能集团清洁能源技术研究院有限公司 | Method for determining gravity center of article to be measured |
| TWI666540B (en) * | 2017-04-12 | 2019-07-21 | 緯創資通股份有限公司 | Gravity center adjustment mechanism and related camera device |
| CN109374204A (en) * | 2018-09-27 | 2019-02-22 | 北京航天控制仪器研究所 | Three floating instrument float assembly balance detecting devices of one kind and method |
| CN111693212A (en) * | 2020-06-02 | 2020-09-22 | 翔升（上海）电子技术有限公司 | Gravity center measuring device and method |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JPS5563709A (en) * | 1978-11-08 | 1980-05-14 | Hitachi Ltd | Measuring method of bending at cylinder body |
| JPH02221833A (en) * | 1989-02-22 | 1990-09-04 | Mitsubishi Heavy Ind Ltd | Measuring instrument for center of gravity of cylindrical body |
| CN100567926C (en) * | 2005-10-24 | 2009-12-09 | 中国科学院电工研究所 | Gyrosope spherical rotor three-D static balaming measuring method and device |
| CN102175391B (en) * | 2010-12-15 | 2012-08-29 | 河北汉光重工有限责任公司 | Device and method for measuring gravity center position of infrared guidance missile guide head |
| CN103256967A (en) * | 2012-02-20 | 2013-08-21 | 哈尔滨建成集团有限公司 | System for detecting mass, mass center and mass offcenter of cylinder |
| EP2657670A1 (en) * | 2012-04-24 | 2013-10-30 | Siemens Aktiengesellschaft | Reference standard for calibrating a moment weight scale |
| CN204142424U (en) * | 2014-09-29 | 2015-02-04 | 深圳市大疆创新科技有限公司 | Centroid measurement instrument |
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Granted publication date: 20180123 Termination date: 20190819 |