CN107356371A - Gothicism groove support meanss in a kind of centroid measurement equipment - Google Patents

Gothicism groove support meanss in a kind of centroid measurement equipment Download PDF

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Publication number
CN107356371A
CN107356371A CN201710552422.3A CN201710552422A CN107356371A CN 107356371 A CN107356371 A CN 107356371A CN 201710552422 A CN201710552422 A CN 201710552422A CN 107356371 A CN107356371 A CN 107356371A
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CN
China
Prior art keywords
groove
ball
support
gothicism
supporter
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN201710552422.3A
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Chinese (zh)
Inventor
张晓琳
王梅宝
于航
唐文彦
王军
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Harbin Institute of Technology
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Harbin Institute of Technology
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Harbin Institute of Technology filed Critical Harbin Institute of Technology
Priority to CN201710552422.3A priority Critical patent/CN107356371A/en
Publication of CN107356371A publication Critical patent/CN107356371A/en
Pending legal-status Critical Current

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Classifications

    • GPHYSICS
    • G01MEASURING; TESTING
    • G01MTESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
    • G01M1/00Testing static or dynamic balance of machines or structures
    • G01M1/02Details of balancing machines or devices

Abstract

Gothicism groove support meanss in a kind of centroid measurement equipment, it is related to field of measuring technique.The present invention is poor to solve the support meanss stability in existing centroid measurement equipment, the problem of influenceing the accuracy of measurement.The present invention includes ball lower support, spheroid and upper supporter, lower support, spheroid and upper supporter are set gradually from the bottom to top, the middle part of lower support upper surface is provided with spherical groove, the middle part of upper supporter lower surface is provided with groove in the horizontal direction, the bottom land of groove is tip, the both sides cell wall of groove is circular arc, and spheroid is arranged between spherical groove and groove.The present invention is used for the measurement of object mass center.

Description

Gothicism groove support meanss in a kind of centroid measurement equipment
Technical field
The present invention relates to field of measuring technique, and in particular to Gothicism groove support meanss in a kind of centroid measurement equipment.
Background technology
For the centroid measurement of the large sized objects such as rocket, automobile, submarine, existing e measurement technology is mainly that statical moment is put down Weighing apparatus method, i.e., using the weight of three or four weighing sensor measurement test products, pass through three (or four) weighing and sensings The reading and its relative position relation of device calculate the centroid position of product to be measured.
Wherein line-of-sight course measurement is exactly that product to be measured is installed on product bracket, and product bracket is by three weighing sensors Support, these three sensors are uniformly distributed in 120 degree.Pass through the measurement data of these three weighing sensors, and its geometric position Relation, the barycenter of product to be measured can be calculated by statical moment balance method.
There is some following problem during using this measuring method:
1st, in measurement process, it is desirable to the weight of product and product bracket to be measured is undertaken by three weighing sensors completely, And it can not be supported by other structures;
2nd, weighing sensor forced position is different, and its output valve is different, therefore it is required that during measurement weighing sensor every time by Power position is identical;
3rd, ensure that weighing sensor by the power perpendicular to its stress surface, without being influenceed by side force, otherwise can during measurement Reduce accuracy of measurement.
In order to solve the above problems, the supporting way of sensor is mainly adopted when carrying out centroid measurement in this way at present With ball-and-socket-ball-socket arrangement, or ball-and-socket-ball-planar structure.Ball-and-socket-ball-ball-and-socket supporting way, ball-and-socket 2 are fixed on At the stress point of weighing sensor, ball-and-socket 1 is fixed on product bracket, because ball leans on Action of Gravity Field, and geometric form in ball-and-socket Shape influences, and can be automatically positioned at ball-and-socket bottom in theory, realize the stress of the design of product bracket automatic centering weighing sensor Dot center.
Socket arrangement using line-of-sight course or four-point method survey into due to processing, assembling can not be kept away in real process Exempt from error be present, the position that ball-and-socket 1 is installed on product bracket can and design attitude have a deviation, and the installation position of weighing sensor Put and cannot guarantee that it is design attitude, i.e., on the triangle and three weighing sensors of three in mounting bracket ball-and-socket composition The shape of triangle of ball-and-socket composition, position can not be identical, thus cannot be guaranteed it is entirely on the center, now, due to stress point It is not located at ball-and-socket center, weighing sensor bears side force, can influence centroid measurement result accuracy.
The conventional supporting way of another kind is the supporting way that three weighing sensors use ball-and-socket-ball-plane, this When product bracket can appoint easy movement in position on three balls, realize automatic centering and eliminate side force, but one can be introduced The problem of new is exactly that product bracket locations are not fixed, and the frame of reference of accurate measurement product is intended to when measuring barycenter every time, and Measurement process is dangerous, be easily caused product bracket landing, so in this way when often to add guider, if but leading Then measurement accuracy is have impact on to device stress again.
The content of the invention
The present invention is poor in order to solve the support meanss stability in existing centroid measurement equipment, influences the accuracy of measurement Problem, and then propose Gothicism groove support meanss in a kind of centroid measurement equipment.
The present invention adopts the technical scheme that to solve above-mentioned technical problem:
Gothicism groove support meanss include ball lower support, spheroid and upper supporter in a kind of centroid measurement equipment, under Supporter, spheroid and upper supporter are set gradually from the bottom to top, and the middle part of lower support upper surface is provided with spherical groove, upper support The middle part of body lower surface is provided with groove in the horizontal direction, and the bottom land of groove is tip, and the both sides cell wall of groove is circular arc, ball Body is arranged between spherical groove and groove.
The beneficial effect that includes compared with prior art of the present invention is:
Gothicism groove supporting way proposed by the present invention for centroid measurement, matter can be effectively reduced with automatic centering The problem of sensor bears side force in heart measurement;And with completely positioning, be not in measurement process product slide show As etc..The invention has following advantage:
1st, automatic centering can be realized, reduces weighing sensor in measurement process and bears side force, make the matter of object under test Heart measurement accuracy can reach 0.3mm, ensure the accuracy of measurement;
2nd, there is positioning completely, the accident such as product landing in measurement process that avoids occurs;
3rd, can eliminate ball, ball-and-socket, groove processing, assemble equal error influence, when these errors simultaneously in the presence of, always Can have a suitable position makes ball-and-socket-ball-Gothicism groove perfect cooperation, measurement reproducibility height;
4th, Gothicism groove normal section is bicircular arcs, is two-point contact when being contacted with ball, and weight capacity is better than other sides Formula such as ball-and-socket-ball, needling-ball etc. a little contact, in addition, by taking ball-and-socket-ball as an example, ball-and-socket radius of curvature is more than ball, therefore ball Position is not strict unique in ball-and-socket, there is certain moving range, and Gothicism groove is in normal section direction and the position of ball Put uniquely, in the absence of gap, measurement reproducibility can be improved;
5th, 3 points or 4 points use be the advantages of Gothicism groove supporting way stress it is identical, abrasion degree of holding it is identical, Life-span is identical, avoids other manner, during the other combinations of such as ball-and-socket, cone nest, needling, plane and ball contact area not The situation same, stress is different and then the life-span is different occurs, and equipment entirety service life can improve more than 45%.
Brief description of the drawings
Fig. 1 is the overall structure diagram of the present invention;
Fig. 2 is the enlarged diagram of contact area after stress of the present invention.
Embodiment
Embodiment one:Illustrate present embodiment, a kind of centroid measurement described in present embodiment with reference to Fig. 1 to Fig. 2 Gothicism groove support meanss include ball lower support 1, spheroid 2 and upper supporter 3 in equipment, lower support 1, spheroid 2 and on Supporter 3 is set gradually from the bottom to top, and the middle part of the upper surface of lower support 1 is provided with spherical groove 1-1, the upper lower surface of supporter 3 Middle part be provided with groove 3-1 in the horizontal direction, groove 3-1 bottom land is tip, and groove 3-1 both sides cell wall is circular arc, Spheroid 2 is arranged between spherical groove 1-1 and groove 3-1.
In the supporting way, lower support 1 is fixed on weighing sensor, and upper supporter 3 is fixed on product bracket, ball Body 2 can the automatic centering in spherical groove 1-1, in groove 3-1 carry out axially rolled along groove 3-1.
Groove 3-1 this structure has the characteristics of pointed arched door, and its normal section is Gothic.Line-of-sight course measures matter During the heart, three Support Positions use this groove 3-1 on product bracket, are when the position of spheroid 2 the characteristics of this supporting way When putting fixed, groove 3-1 can move along axial location, when triangle that three Support Positions on product bracket are formed with On weighing sensor three positions formed it is triangular shaped incomplete same when, the spherical groove of spheroid 2 on a sensor Can be with automatic centering in 1-1, and the product bracket with three Gothicism groove 3-1 equally always can with a suitable position Make it not by side force to coordinate with three spheroids 2.Because the axis where three Gothicism groove 3-1 may be constructed Unique triangle of any length of side in the range of this.
When not stressing, the contact with spherical groove 1-1 and groove 3-1 of spheroid 2 is that point contacts, and after loading product, is connect Touch region and micro-strain occurs, contacted for face, this is typical Hertz Contact Problem, and contact area amplifies as shown in Figure 2, is Ellipse, the major axis of spheroid 2 and groove 3-1 Contact Ellipse be 2a, short axle 2b, spheroid 2 and spherical groove 1-1 Contact Ellipse Major axis be 2A, short axle 2B.
When four-point method measures barycenter during Gothicism groove supporting way, its common feature with line-of-sight course is groove 3-1 axles The round center of circle is formed in their centers to intersecting at.
Embodiment two:Illustrate present embodiment with reference to Fig. 1, groove 3-1 circular arc side walls described in present embodiment Radius of curvature be more than the outer surface of spheroid 2 radius of curvature.Other compositions and connected mode are identical with embodiment one.
It is so designed that to ensure that spheroid 2 can roll in groove 3-1 interior edge grooves 3-1 axial direction.
Embodiment three:Illustrate present embodiment with reference to Fig. 1, the upper end of lower support 1 is described in present embodiment First cylinder 1-2, spherical groove 1-1 are arranged on the middle part of the first cylinder 1-2 upper surfaces, and the lower end of upper supporter 3 is the Two cylinder 3-2, groove 3-1 are radially arranged on the second cylinder 3-2 lower surface.Other compositions and connected mode It is identical with embodiment two.
The supporter for making lower support 1 form a ball-and-socket shape is so designed that, upper supporter 3, which forms one, has Gothicism The supporter of groove.
Embodiment four:Illustrate present embodiment with reference to Fig. 1, the lower end of lower support 1 is described in present embodiment 3rd cylinder 1-3, the upper end of upper supporter 3 is the 4th cylinder 3-3.Other compositions and connected mode and embodiment Three is identical.
It is so designed that the installation and fixation for being easy to upper supporter 1 and lower support 3.
Embodiment five:Illustrate present embodiment, the first cylinder 1-2, second described in present embodiment with reference to Fig. 1 Cylinder 3-2, the 3rd cylinder 1-3 and the 4th cylinder 3-3 axis collinear are set.It is other composition and connected mode with specifically Embodiment four is identical.
It is so designed that the overall centering for being easy to implement support meanss.
Operation principle
In the supporting way, lower support 1 is fixed on weighing sensor, and upper supporter 3 is fixed on product bracket, ball Body 2 can the automatic centering in spherical groove 1-1, in groove 3-1 carry out axially rolled along groove 3-1.
Groove 3-1 this structure has the characteristics of pointed arched door, and its normal section is Gothic.Line-of-sight course measures matter During the heart, three Support Positions use this groove 3-1 on product bracket, are when the position of spheroid 2 the characteristics of this supporting way When putting fixed, groove 3-1 can move along axial location, when triangle that three Support Positions on product bracket are formed with On weighing sensor three positions formed it is triangular shaped incomplete same when, the spherical groove of spheroid 2 on a sensor Can be with automatic centering in 1-1, and the product bracket with three Gothicism groove 3-1 equally always can with a suitable position Make it not by side force to coordinate with three spheroids 2.Because the axis where three Gothicism groove 3-1 may be constructed Unique triangle of any length of side in the range of this.
When not stressing, the contact with spherical groove 1-1 and groove 3-1 of spheroid 2 is that point contacts, and after loading product, is connect Touch region and micro-strain occurs, contacted for face, this is typical Hertz Contact Problem, and contact area amplifies as shown in Figure 2, is Ellipse, the oval major axis are 2a, short axle 2b.
When four-point method measures barycenter during Gothicism groove supporting way, its common feature with line-of-sight course is groove 3-1 axles The round center of circle is formed in their centers to intersecting at.

Claims (5)

  1. A kind of 1. Gothicism groove support meanss in centroid measurement equipment, it is characterised in that:In a kind of centroid measurement equipment Gothicism groove support meanss include ball lower support (1), spheroid (2) and upper supporter (3), lower support (1), spheroid (2) Set gradually from the bottom to top with upper supporter (3), the middle part of lower support (1) upper surface is provided with spherical groove (1-1), upper support The middle part of body (3) lower surface is provided with groove (3-1) in the horizontal direction, and the bottom land of groove (3-1) is sophisticated, and the two of groove (3-1) Side channel wall is circular arc, and spheroid (2) is arranged between spherical groove (1-1) and groove (3-1).
  2. A kind of 2. Gothicism groove support meanss in centroid measurement equipment according to claim 1, it is characterised in that:The ditch The radius of curvature of groove (3-1) circular arc side wall is more than the radius of curvature of spheroid (2) outer surface.
  3. A kind of 3. Gothicism groove support meanss in centroid measurement equipment according to claim 2, it is characterised in that:Under described The upper end of supporter (1) is the first cylinder (1-2), and spherical groove (1-1) is arranged in the first cylinder (1-2) upper surface Portion, the lower end of upper supporter (3) is the second cylinder (3-2), and groove (3-1) is radially arranged on the second cylinder (3- 2) on lower surface.
  4. A kind of 4. Gothicism groove support meanss in centroid measurement equipment according to claim 3, it is characterised in that:Under described The lower end of supporter (1) is the 3rd cylinder (1-3), and the upper end of upper supporter (3) is the 4th cylinder (3-3).
  5. A kind of 5. Gothicism groove support meanss in centroid measurement equipment according to claim 4, it is characterised in that:Described One cylinder (1-2), the second cylinder (3-2), the axis collinear of the 3rd cylinder (1-3) and the 4th cylinder (3-3) are set.
CN201710552422.3A 2017-07-07 2017-07-07 Gothicism groove support meanss in a kind of centroid measurement equipment Pending CN107356371A (en)

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CN201710552422.3A CN107356371A (en) 2017-07-07 2017-07-07 Gothicism groove support meanss in a kind of centroid measurement equipment

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Application Number Priority Date Filing Date Title
CN201710552422.3A CN107356371A (en) 2017-07-07 2017-07-07 Gothicism groove support meanss in a kind of centroid measurement equipment

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Publication Number Publication Date
CN107356371A true CN107356371A (en) 2017-11-17

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CN201710552422.3A Pending CN107356371A (en) 2017-07-07 2017-07-07 Gothicism groove support meanss in a kind of centroid measurement equipment

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110715769A (en) * 2019-10-23 2020-01-21 浙江理工大学 Method for calibrating stress point position of weighing sensor of multi-point method centroid measuring equipment

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1336539A (en) * 2000-07-28 2002-02-20 机械工业部郑州机械研究所 Measurer for mass center, figure center and mass center deviation of object
CN102426085B (en) * 2011-08-19 2014-06-04 西安理工大学 Device and method for testing contact rigidity of spherical surface-rotary surface combining surface
CN104034478A (en) * 2014-06-30 2014-09-10 哈尔滨工业大学 Supporting device with ball socket, column socket and plane combined in mass center measurement
CN105806562A (en) * 2016-05-16 2016-07-27 北京航天发射技术研究所 Mass and center three-point supporting redundancy measuring equipment

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1336539A (en) * 2000-07-28 2002-02-20 机械工业部郑州机械研究所 Measurer for mass center, figure center and mass center deviation of object
CN102426085B (en) * 2011-08-19 2014-06-04 西安理工大学 Device and method for testing contact rigidity of spherical surface-rotary surface combining surface
CN104034478A (en) * 2014-06-30 2014-09-10 哈尔滨工业大学 Supporting device with ball socket, column socket and plane combined in mass center measurement
CN105806562A (en) * 2016-05-16 2016-07-27 北京航天发射技术研究所 Mass and center three-point supporting redundancy measuring equipment

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110715769A (en) * 2019-10-23 2020-01-21 浙江理工大学 Method for calibrating stress point position of weighing sensor of multi-point method centroid measuring equipment

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Application publication date: 20171117

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