CN201218765Y - Measurement mechanism used for measuring mass center position of object - Google Patents
Measurement mechanism used for measuring mass center position of object Download PDFInfo
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- CN201218765Y CN201218765Y CNU2008200701887U CN200820070188U CN201218765Y CN 201218765 Y CN201218765 Y CN 201218765Y CN U2008200701887 U CNU2008200701887 U CN U2008200701887U CN 200820070188 U CN200820070188 U CN 200820070188U CN 201218765 Y CN201218765 Y CN 201218765Y
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- measuring
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- measuring mechanism
- support
- centroid position
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Abstract
A measuring mechanism for measuring the object centroid position is characterized that: the measuring mechanism comprises a frame (1), at least three weighting sensors (3) for measuring the quality, centroid equipped on the frame in equispaced mode along the perpendicular bisector of the frame, a rotation shaft (3) placed on the sensor in suspended mode, a rotation tray (4) equipped upon the rotation shaft and fixedly connected with the rotation shaft (3-1). Because the measuring mechanism of the utility model places the measuring mechanism on the sensor, the measuring mechanism is able to weight the mass overall quality; the rotation shaft rotates driven by the power mechanism and drives the to-be-object to synchronously rotate by the object bearing tray to realize the exact measuring of bias amount.
Description
Technical field
The utility model relates to a kind of measuring mechanism that is used for the Measuring Object centroid position.
Background technology
(centroid offset is the distance of barycenter with respect to the centre of form for the barycenter of object, the centre of form and centroid offset thereof, projection on the plane of vertical axis) measurement is used on the spacecraft more, such as the mass property parameter measurement of all kinds of bullets, satellite, airship, space station etc., the accurate measurement of these parameters is absolutely necessary for improving product flight stability and hit rate.And the centroid position measurement is the important foundation that all mass propertys are measured.
Measure the direct weighings of barycenter three (or a plurality of) LOAD CELLS of most employings at present and calculate or adopt balance edge of a knife principle.
Adopt sensor directly to measure calculating, simple and efficient, but the absolute error of sensor will inevitably directly influence the measurement accuracy of centroid position at this moment.It is not far that centroid position generally departs from the centre of form, centroid motion causes the size of the ratio decision centroid offset of the variable quantity of sensor values and gross mass, and this variable quantity is a little value for the object oeverall quality, sensor all will be added to for the measuring error of all-mass on this little value, so sensor is directly measured centroid position, precision will be subjected to severely restricts.
Be to improve centroid position and measure sensitivity and precision, adopt edge of a knife structure, directly total quality is carried by the edge of a knife, arrange in the vertical direction of edge of a knife line that little range sensors is used for measuring by barycenter and depart from the eccentric force that causes.Measurement sensitivity and precision have so just been improved.The one dimension balance-type type barycenter scale that Here it is uses always.On this structure, do further to improve, arrange two groups of orthogonal edge of a knife structures up and down, just can form two-dimentional balance-type type barycenter scale.But need gross mass owing to calculate centroid position, so also need the auxiliary electron scale to carry out mass measurement.
Applicant of the present utility model once was 00115925.9 in the patent No., publication number is CN1336539, name is called " measurement mechanism that is used for Measuring Object barycenter, the centre of form and barycenter bias " patent above-mentioned edge of a knife type barycenter scale has been carried out improving design, employing is placed rotary axis and is carried out two-dimentional barycenter measurement on the one dimension edge of a knife, be convenient to kinetic measurement and measuring process robotization.This method has compact conformation, automaticity height, precision advantages of higher, and shortcoming is same needs gross mass owing to calculate centroid position, so also need the auxiliary electron scale to carry out mass measurement.
Clearly, adopt sensor directly to measure, only need single mechanism just can carry out quality, barycenter is measured, but owing to be that the increment size of employing absolute measurement calculates barycenter and departs from, the error of increment size is comprising the error of gamut, its precision is relatively poor.The barycenter scale of edge of a knife type, measurement be the numerical value that bias causes, sensitivity and precision obviously improve, but this structure can not the weighing oeverall quality, need to adopt additive method to measure gross mass after, could calculate centroid position.
Summary of the invention
The purpose of this utility model provides the measuring mechanism that is used for the Measuring Object centroid position that a kind of structure is more reasonable, measuring accuracy is high at existing weak point in the above-mentioned prior art just.
The measuring mechanism that is used for the Measuring Object centroid position of the present utility model comprises support, be arranged at least three LOAD CELLS that are used to measure quality, barycenter on the support around the support perpendicular bisector with equal mode for cloth, be placed on rotary axis on the sensor with the mode frame that suspends, be arranged on the rotary axis top and with rotary-tray by the turning axle Joint of drive power source.
Rotary axis described in the utility model is placed on the sensor with the mode frame that suspends by the outward extending support edge of the level of its shell upper setting, and support edge is placed on the sensor with the mode frame of a contact by the support member that is arranged on the bottom surface.There are not horizontal shift or rotation relation between the shell of described rotary axis and support.
Measuring principle of the present utility model and beneficial effect are as follows:
Because measuring mechanism of the present utility model is that rotary axis is placed on the sensor, can carry out the weighing of oeverall quality; Rotating shaft is driven slowly by actuating unit and rotates, and drives measured body by dish bearing matter and rotates synchronously, can realize the accurate measurement of bias.If centroid position is on rotation, barycenter will be made garden Zhou Yundong around rotation, and sensor reading will produce cyclical variation this moment, will obtain maximal value and minimum value and corresponding angle after measuring a week, can calculate its centroid position in view of the above.Maximal value be the twice of bias to the difference of little value, the difference of the two is just in time offset the systematic error of gamut again same sensor, is the equal of the matching measurement of same sensor, its precision obviously improves.
Description of drawings
Fig. 1 is a front view of the present utility model.
Fig. 2 is the side view of Fig. 1.
Embodiment
The utility model is further described below with reference to embodiment (accompanying drawing):
As shown in Figure 1, 2, the measuring mechanism that is used for the Measuring Object centroid position of the present utility model comprises support 1, be arranged on three or four LOAD CELLS 2 that are used to measure quality, barycenter on the support around the support perpendicular bisector with equal mode for cloth, be placed on rotary axis 3 on the sensor 2 with the mode frame that suspends, be arranged on the rotary axis top and with the rotary-tray 4 of the turning axle 3-1 Joint that drives by power source 5.
Say that more specifically rotary axis described in the utility model 3 is placed on the sensor 2 with the mode frame that suspends by the outward extending support edge 3-2 of the level of its shell upper setting, and support edge 3-2 is placed on the sensor 2 with the mode frame of a contact by the support member 3-3 that is arranged on the bottom surface; 1 on the shell of described rotary axis 3 and support do not exist horizontal shift or rotation relation.
Claims (2)
1, a kind of measuring mechanism that is used for the Measuring Object centroid position, it is characterized in that: this measuring mechanism comprises support (1), be arranged at least three LOAD CELLS (2) that are used to measure quality, barycenter on the support around the support perpendicular bisector with equal mode for cloth, be placed on rotary axis (3) on the sensor with the mode frame that suspends, be arranged on the rotary axis top and with the rotary-tray (4) of turning axle (3-1) Joint.
2, the measuring mechanism that is used for the Measuring Object centroid position according to claim 1, it is characterized in that: described rotary axis (3) is placed on the sensor with the mode frame that suspends by the outward extending support edge of the level of its shell upper setting, and support edge is placed on the sensor (2) with the mode frame of a contact by the support member that is arranged on the bottom surface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008200701887U CN201218765Y (en) | 2008-04-25 | 2008-04-25 | Measurement mechanism used for measuring mass center position of object |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008200701887U CN201218765Y (en) | 2008-04-25 | 2008-04-25 | Measurement mechanism used for measuring mass center position of object |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201218765Y true CN201218765Y (en) | 2009-04-08 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
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| CNU2008200701887U Expired - Lifetime CN201218765Y (en) | 2008-04-25 | 2008-04-25 | Measurement mechanism used for measuring mass center position of object |
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| CN (1) | CN201218765Y (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101261171B (en) * | 2008-04-25 | 2010-07-28 | 郑州机械研究所 | Measuring mechanism for measuring object centroid position |
| CN102507091A (en) * | 2011-11-22 | 2012-06-20 | 天津大学 | Object mass center measuring device and method |
| CN103575470A (en) * | 2013-10-01 | 2014-02-12 | 东北林业大学 | Gravity center measurement instrument based on moment balance principle |
| CN105067094A (en) * | 2015-09-09 | 2015-11-18 | 长春工业大学 | Torque type fan-shaped paper pulp grinding mass and centroid detection device |
| CN106500808A (en) * | 2016-11-04 | 2017-03-15 | 北京航天发射技术研究所 | Quality center of mass testboard |
| DE102017116763B4 (en) | 2016-11-15 | 2023-05-17 | Jenoptik Industrial Metrology Germany Gmbh | Method and device for testing a test object |
-
2008
- 2008-04-25 CN CNU2008200701887U patent/CN201218765Y/en not_active Expired - Lifetime
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101261171B (en) * | 2008-04-25 | 2010-07-28 | 郑州机械研究所 | Measuring mechanism for measuring object centroid position |
| CN102507091A (en) * | 2011-11-22 | 2012-06-20 | 天津大学 | Object mass center measuring device and method |
| CN102507091B (en) * | 2011-11-22 | 2014-01-15 | 天津大学 | Object mass center measuring device and method |
| CN103575470A (en) * | 2013-10-01 | 2014-02-12 | 东北林业大学 | Gravity center measurement instrument based on moment balance principle |
| CN105067094A (en) * | 2015-09-09 | 2015-11-18 | 长春工业大学 | Torque type fan-shaped paper pulp grinding mass and centroid detection device |
| CN106500808A (en) * | 2016-11-04 | 2017-03-15 | 北京航天发射技术研究所 | Quality center of mass testboard |
| CN106500808B (en) * | 2016-11-04 | 2019-07-05 | 北京航天发射技术研究所 | Quality center of mass testboard |
| DE102017116763B4 (en) | 2016-11-15 | 2023-05-17 | Jenoptik Industrial Metrology Germany Gmbh | Method and device for testing a test object |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20090408 Effective date of abandoning: 20080425 |