CN104034478A - Supporting device with ball socket, column socket and plane combined in mass center measurement - Google Patents

Supporting device with ball socket, column socket and plane combined in mass center measurement Download PDF

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Publication number
CN104034478A
CN104034478A CN201410305090.5A CN201410305090A CN104034478A CN 104034478 A CN104034478 A CN 104034478A CN 201410305090 A CN201410305090 A CN 201410305090A CN 104034478 A CN104034478 A CN 104034478A
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China
Prior art keywords
ball
socket
supporting
needling
measurement
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CN201410305090.5A
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CN104034478B (en
Inventor
张晓琳
唐文彦
梁秀杰
王军
张烈山
刘万村
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Harbin Institute of Technology
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Harbin Institute of Technology
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Abstract

The invention provides a supporting device with a ball socket, a column socket and a plane combined in mass center measurement and relates to a supporting structure. The problems that a sensor adopted in an existing mass center measurement ball-ball socket supporting method can not be automatically adjusted to the position aligned with a bearing point, accuracy of the alignment position is poor, and guide friction force is large in a ball plane supporting method can be solved. The supporting device comprises a ball socket supporting structure, a ball plane supporting structure and a measurement pedestal and further comprises a column socket supporting structure. The column socket supporting structure comprises a column socket board, a steel ball, a ball base, a bearing sensor, a bearing sensor tray and a base. The bearing sensor is installed on the bearing sensor tray. The bearing sensor tray is rotationally installed on the base. The base is installed on the measurement pedestal. The ball base is detachably installed on the bearing sensor. The steel ball is placed in the middle of the upper surface of the ball base. The horizontally-arranged column socket board is placed on the upper portion of the steel ball. The supporting device is used for large-size aircraft mass center measurement.

Description

The bracing or strutting arrangement that in barycenter measurement, ball-and-socket, needling, plane combine
Technical field
The present invention relates to a kind of supporting construction, be specifically related to a kind of supporting construction of large scale aircraft barycenter measuring equipment.
Background technology
The supporting way of large scale aircraft barycenter measuring equipment, the problem of side force exists always, affects measuring accuracy.The output valve of the known sensor of ultimate principle and the measured value of sensor stress point position by multipoint method have directly affected the measurement result of quality center of mass, so how to guarantee that the accuracy of sensor output value and center sensor stress point position measurements becomes the key factor that improves quality center of mass test desk measuring accuracy.The supporting construction of sensor is the key factor that affects Sensor Output Characteristic and sensor stress point position.
At present, the impact of sensor support mode on barycenter measurement result,
The principal element that affects sensor output value precision for quality center of mass test desk has:
1. sensor data acquisition module is subject to electrical Interference, causes image data unstable;
2. software data processing is unreasonable, affects measuring accuracy;
3. measure not centering of support supporting point and center sensor stress point, have side force, cause measurement result to have deviation.
The main cause that affects sensor stress point positional accuracy measurement has:
1. coordinate measurment instrument accuracy limitations;
2. there is personnel's operate miss in measuring process;
3. measure support supporting point and center sensor stress point not on same vertical line, the transverse axis X of the supporting point position recording, the coordinate of longitudinal axis Y-direction are not the transverse axis X of center sensor stress point, the coordinate of longitudinal axis Y-direction.
Can find out from the above analysis, the factor that affects precision mainly contains surveying instrument, software, electromagnetic interference (EMI), sensor support mechanism etc.The precision problem of instrument can solve by changing high-precision instrument, software is processed problem can improve precision by update routine, electromagnetic interference (EMI) can solve by shield assembly, when occurring, these problems all than being easier to, solve, but if supporting point and center sensor stress point exist not centering problem, be difficult to solve.Because the physical construction volume of quality center of mass test desk is large, cost is high, process-cycle is long, having assembled rear being difficult to modifies again, so must be according to measuring the Design of Mechanical Structure principle that requires to prove scrupulously sensor support structure before machining, sensor support structure distribution position and the maching dimension of accurate Calculation, guarantee that itself and center sensor o'clock on a vertical line, reduce measuring error as far as possible.
At present, the supporting way of applying more measurement support and sensor on the barycenter test desk based on multipoint method is that ball-ball-and-socket props up staying and ball-planar support method.
Ball-ball-and-socket props up staying: ball-ball-and-socket supporting construction as Figure 1-Figure 2, generally by sensor support structure (base, thrust ball bearing, bearing seat), sensor, pressure steel ball seat, steel ball and ball-and-socket, formed, the size of ball-and-socket and ball must meet certain relation, energy free movement, again can sensitive playback to the heart, when sensor base is placed thrust ball bearing and reduced sensor movement and the friction of base.When steel ball generation side force, ball can be with dynamic sensor to do level to move about, thereby eliminates side force, makes supporting point and center sensor stress point centering.
Ball-ball-and-socket supporting construction physical construction is simpler, easily realizes, and sensor centering is more flexible, can meet general measurement requirement, applies more extensive.But in actual measurement process, impact due to some factors such as physical construction deformation, machining accuracy, installation leveling precision, three sensor while levels are moved about also dumb, the perfect condition with supporting point centering is adjusted in the very difficult arrival of sensor automatically, for accuracy requirement better quality center mass measuring device, still do not reach measurement requirement, and after improving, precision raising not clearly.
Ball-planar support method: the structure of ball-planar support method as shown in Figure 3, is comprised of sensor support structure, sensor, steel ball seat and steel ball, is used this method for supporting must coordinate guidepost, as shown in the figure.The sensor of ball-planar support method is directly placed on pallet and base, be fixed on together on test desk base, in measuring process, can not free level move about, because steel ball is plane with measuring support contact portion, steel ball is without constraint, for preventing measuring support and product lateral deviation to be measured, on the elevating lever of elevating mechanism, guidepost is installed, the position of fixation measuring support.
In ball-planar support method, steel ball is not gone up the side force impact of ball-and-socket, and steel ball skid force is little, more easily realizes the centering of supporting point and center sensor stress point, and Machine Design industry is simple, easily realizes; But when measuring support generation lateral deviation, although guidepost has played positioning action, also produced very large friction force, serious impact the measured value precision of sensor.That this method is used in current measurement and few.
Summary of the invention
The present invention props up staying and exists sensor to be difficult to reach automatically to adjust to and supporting point centering for solving ball-ball-and-socket that existing barycenter measures, there is the large problem of guiding friction force in the poor and ball planar support method of centering positional precision, so provide a kind of barycenter measure in the bracing or strutting arrangement that combines of ball-and-socket, needling, plane.
The present invention addresses the above problem the technical scheme of taking to be: the bracing or strutting arrangement that in barycenter measurement of the present invention, ball-and-socket, needling, plane combine comprises ball-and-socket supporting construction, ball plane supporting structure and measures pedestal; Described bracing or strutting arrangement also comprises needling supporting construction, and ball-and-socket supporting construction, needling supporting construction and ball plane supporting structure are isosceles triangle and are arranged on measurement pedestal; Described needling supporting construction comprises needling plate, steel ball, ball seat, bearing sensor, bearing sensor pallet and base, on bearing sensor pallet, bearing sensor is installed, bearing sensor pallet is rotatably installed on base, floor installation is being measured on pedestal, ball seat is detachably arranged in bearing sensor, the middle part of the upper surface of ball seat is placed with steel ball, steel ball top is placed with horizontally disposed needling plate, the lower surface of needling plate is processed with the groove that cross section is semicircular arc along its length, and steel ball leans on groove.
The invention has the beneficial effects as follows: ball-ball-and-socket, needling-planar support method adopt supported at three point method, three sensors are arranged on base by isosceles triangle, each sensor is different from the way of contact of measuring support, has adopted respectively plane, three kinds of different structures of degree of flexibility of ball-and-socket and needling.The sensing station of plane supporting structure does not need to adjust, and can utilize steel ball free movement in the plane to realize the strong point and center sensor automatic centering, and centering process is very fast; Ball-and-socket supporting construction has been improved the dirigibility of the horizontal swimming characteristics of sensor, for measuring the side force that support and product to be measured cause, can be moved about and be overcome by the level of sensor; The measurement support sideslip problem causing in order to solve ball-planar structure, does not increase again system friction, has designed needling structure, has reduced the lateral deviation power of test desk; And use laser tracker to measure the supporting point coordinate of three sensors, greatly improved the precision of measuring.The point of three kinds of different structures carries out the mutual constraint condition of automated procedure simultaneously and reduces, and centering process time shortens, and the precision of centering greatly improves.
The perfect condition of measuring is for when test desk drops on steel ball, if the contact point of three kinds of ball-and-sockets and steel ball and center sensor stress point on same vertical line, the measured value of sensor and the positional accuracy measurement of supporting point are the highest.
Ball-ball-and-socket-needling-planar support method structure three-dimensional figure as shown in Figure 6.Measurement value sensor can be by acquisition module output displays such as weighing instruments, during survey sensor center stressed point position coordinates, first utilize laser tracker to measure the visible anchor point designing in advance on test desk, then utilize coordinate conversion to calculate center sensor position coordinates, the above-mentioned measurement that is prior art.The present invention adopts the freedom of ball-and-socket, needling and plane without the supported at three point mode of side force, has guaranteed uniqueness and the repeatability of application point, realizes the free automatic centering without side force.
Accompanying drawing explanation
Fig. 1 is the perspective view of ball-ball-and-socket supporting construction in background technology, Fig. 2 is the exploded view of Fig. 1, Fig. 3 is the perspective view of ball-plane supporting structure in background technology, Fig. 4 is the perspective view of ball-needling supporting construction, Fig. 5 is for installing the measurement support schematic diagram of needling, ball-and-socket and the plane supported at three point of guidepost, and Fig. 6 is perspective view of the present invention.
Embodiment
Embodiment one: in conjunction with Fig. 4-Fig. 6 explanation, the bracing or strutting arrangement that in the barycenter measurement of present embodiment, ball-and-socket, needling, plane combine comprises ball-and-socket supporting construction 1, ball plane supporting structure 2 and measures pedestal 3, described bracing or strutting arrangement also comprises needling supporting construction 4, and ball-and-socket supporting construction 1, needling supporting construction 4 and ball plane supporting structure 2 are isosceles triangle and are arranged on measurement pedestal 3, described needling supporting construction 4 comprises needling plate 4-1, steel ball 4-2, ball seat 4-3, bearing sensor 4-4, bearing sensor pallet 4-5 and base 4-7, on bearing sensor pallet 4-5, bearing sensor 4-4 is installed, bearing sensor pallet 4-5 is rotatably installed on base 4-7, base 4-7 is arranged on and measures on pedestal 3, ball seat 4-3 is detachably arranged on bearing sensor 4-4, the middle part of the upper surface of ball seat 4-3 is placed with steel ball 4-2, steel ball 4-2 top is placed with horizontally disposed needling plate 4-1, the lower surface of needling plate 4-1 is processed with the groove 4-6 that cross section is semicircular arc along its length, steel ball 4-2 leans on groove 4-6.
In present embodiment, ball-and-socket supporting construction 1 is preferentially as the summit of isosceles triangle, and the middle part of the upper surface of the ball seat of present embodiment is processed with the hemispherical groove of placing steel ball.
Embodiment two: measure pedestal 3 described in present embodiment for circular pedestal.So arrange, meet design requirement and actual barycenter measurement needs.Other is identical with embodiment one.
Embodiment three: in conjunction with Fig. 6 explanation, measure pedestal 3 for rectangle pedestal described in present embodiment.So arrange, meet design requirement and actual barycenter measurement needs.Other is identical with embodiment one.
Embodiment four: in conjunction with Fig. 5 explanation, described in present embodiment, bracing or strutting arrangement also comprises and measures support 5, the upper surface of ball-and-socket plate 1-1 of ball-and-socket supporting construction 1, the upper surface of the needling plate 4-1 of the upper surface of the dull and stereotyped 2-1 of ball plane supporting structure 2 and needling supporting construction 4 be all connected with measurement support 5.So arrange, can meet the needs that quality center of mass is measured.Other is identical with embodiment one, two or three.
Embodiment five: in conjunction with Fig. 4 and Fig. 6 explanation, the bearing sensor pallet 4-5 of present embodiment is rotatably installed on base 4-7 by bearing.So arrange, present embodiment bearing is preferentially selected thrust ball bearing, and thrust ball bearing is placed in sensor tray bottom, while greatly reducing bearing sensor motion and the friction of bearing sensor pallet.Other is identical with embodiment four.

Claims (5)

1. the bracing or strutting arrangement that in barycenter measurement, ball-and-socket, needling, plane combine, it comprises ball-and-socket supporting construction (1), ball plane supporting structure (2) and measures pedestal (3), it is characterized in that: described bracing or strutting arrangement also comprises needling supporting construction (4), ball-and-socket supporting construction (1), needling supporting construction (4) and ball plane supporting structure (2) are isosceles triangle and are arranged on measurement pedestal (3), described needling supporting construction (4) comprises needling plate (4-1), steel ball (4-2), ball seat (4-3), bearing sensor (4-4), bearing sensor pallet (4-5) and base (4-7), bearing sensor (4-4) is installed on bearing sensor pallet (4-5), bearing sensor pallet (4-5) is rotatably installed on base (4-7), base (4-7) is arranged on to be measured on pedestal (3), ball seat (4-3) is detachably arranged in bearing sensor (4-4), the middle part of the upper surface of ball seat (4-3) is placed with steel ball (4-2), steel ball (4-2) top is placed with horizontally disposed needling plate (4-1), the lower surface of needling plate (4-1) is processed with the groove that cross section is semicircular arc (4-6) along its length, steel ball (4-2) leans on groove (4-6).
2. the bracing or strutting arrangement that in barycenter measurement according to claim 1, ball-and-socket, needling, plane combine, is characterized in that: described measurement pedestal (3) is circular pedestal.
3. the bracing or strutting arrangement that in barycenter measurement according to claim 1, ball-and-socket, needling, plane combine, is characterized in that: described measurement pedestal (3) is rectangle pedestal.
4. the bracing or strutting arrangement that in measuring according to the barycenter described in claim 1,2 or 3, ball-and-socket, needling, plane combine, it is characterized in that: described bracing or strutting arrangement also comprises measures support (5), and the upper surface of the needling plate (4-1) of the ball-and-socket plate (1-1) of ball-and-socket supporting construction (1), the flat board (2-1) of ball plane supporting structure (2) and needling supporting construction (4) is all connected with measurement support (5).
5. the bracing or strutting arrangement that in barycenter measurement according to claim 4, ball-and-socket, needling, plane combine, is characterized in that: bearing sensor pallet (4-5) is rotatably installed on base (4-7) by bearing.
CN201410305090.5A 2014-06-30 2014-06-30 The support arrangement that in centroid measurement, ball-and-socket, needling, plane combine Active CN104034478B (en)

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106248299A (en) * 2016-07-11 2016-12-21 上海卫星装备研究所 A kind of based on multi-dimensional force barycenter test system
CN107356371A (en) * 2017-07-07 2017-11-17 哈尔滨工业大学 Gothicism groove support meanss in a kind of centroid measurement equipment
CN108063343A (en) * 2017-12-06 2018-05-22 哈尔滨工业大学 A kind of cable automatic plug-pull device for quality center of mass measurement
CN111707414A (en) * 2020-06-23 2020-09-25 重庆大学 Weighbridge type large heavy aircraft mass and mass center measuring device and method
CN110857882B (en) * 2018-08-23 2021-07-02 中国石油天然气股份有限公司 Balance support device

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CN1435682A (en) * 2002-10-25 2003-08-13 贺良 Three-point weighing type static balance
DE10021491B4 (en) * 2000-05-03 2008-07-31 Brueninghaus Hydromatik Gmbh Method and device for determining the center of gravity of an attachable workpiece, in particular a piston machine
CN103091042A (en) * 2011-11-07 2013-05-08 鸿富锦精密工业(深圳)有限公司 Gravity center measuring device and gravity center measuring method
CN103712745A (en) * 2013-12-26 2014-04-09 哈尔滨工业大学 Device and device for measuring gravity center parameters of helicopter rotor blades

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10021491B4 (en) * 2000-05-03 2008-07-31 Brueninghaus Hydromatik Gmbh Method and device for determining the center of gravity of an attachable workpiece, in particular a piston machine
CN1435682A (en) * 2002-10-25 2003-08-13 贺良 Three-point weighing type static balance
CN103091042A (en) * 2011-11-07 2013-05-08 鸿富锦精密工业(深圳)有限公司 Gravity center measuring device and gravity center measuring method
US20130116806A1 (en) * 2011-11-07 2013-05-09 Jian-Feng Tie System and method for establishing center of gravity
CN103712745A (en) * 2013-12-26 2014-04-09 哈尔滨工业大学 Device and device for measuring gravity center parameters of helicopter rotor blades

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106248299A (en) * 2016-07-11 2016-12-21 上海卫星装备研究所 A kind of based on multi-dimensional force barycenter test system
CN106248299B (en) * 2016-07-11 2019-01-18 上海卫星装备研究所 One kind being based on multi-dimensional force mass center test macro
CN107356371A (en) * 2017-07-07 2017-11-17 哈尔滨工业大学 Gothicism groove support meanss in a kind of centroid measurement equipment
CN108063343A (en) * 2017-12-06 2018-05-22 哈尔滨工业大学 A kind of cable automatic plug-pull device for quality center of mass measurement
CN110857882B (en) * 2018-08-23 2021-07-02 中国石油天然气股份有限公司 Balance support device
CN111707414A (en) * 2020-06-23 2020-09-25 重庆大学 Weighbridge type large heavy aircraft mass and mass center measuring device and method
CN111707414B (en) * 2020-06-23 2022-05-27 重庆大学 Weighbridge type large heavy aircraft mass and mass center measuring device and method

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