CN2932354Y - A mechanism for measurement of centroid, figure center and centroid offset - Google Patents
A mechanism for measurement of centroid, figure center and centroid offset Download PDFInfo
- Publication number
- CN2932354Y CN2932354Y CN 200620031051 CN200620031051U CN2932354Y CN 2932354 Y CN2932354 Y CN 2932354Y CN 200620031051 CN200620031051 CN 200620031051 CN 200620031051 U CN200620031051 U CN 200620031051U CN 2932354 Y CN2932354 Y CN 2932354Y
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- Prior art keywords
- measuring
- center
- centre
- barycenter
- offset
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- Expired - Lifetime
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Abstract
A measuring mechanism for measuring a mass center, a geometric center and a mass center offset of an object is characterized in that the measuring mechanism comprises a rotating pallet (3) provided on a test bench, three weighing sensors (4) for measuring the mass center uniformly provided on the rotating pallet around the circle center thereof, and a measuring rule for measuring the geometric center horizontally arranged on the test bench through a guide post (1) with a vertical equipment, wherein the rule rod (2) of the measuring rule is of adjustable structure, the rule rod is arranged on the guide post (1) by means of movable fitting which can provides an up or down offset, As the utility model measures the mass center and the geometric center of the object at the same test bench, takes a common measuring basis of the two centers and establishes a direct mathematical relationship between the two centers, the measuring problem of the mass center, the geometric center and the mass center offset can be resolved, and the offset of the mass center relative to the geometric center can be accurately calculated.
Description
Technical field
The utility model relates to a kind of measuring mechanism that is used for Measuring Object barycenter, the centre of form and centroid offset.
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 military products more, such as mass property parameter measurement of all kinds of bullets etc., the accurate measurement of these parameters improves launch accuracy and is absolutely necessary for improving the quality of products.
Measure most three (or a plurality of) LOAD CELLS or the employing balance principles of adopting of barycenter at present.Because transducer sensitivity constantly improves, the position measurement of its barycenter relatively accurately.The centre of form is measured and is adopted displacement transducer, and when rotary body rotated, by the variable in distance amount of displacement sensor apart from rotation center, the variable quantity employing mathematical processing methods with distance can draw the geometric centroid of rotary body in this cross section.
Though adopt said method to solve the problems of measurement of the barycenter and the centre of form respectively, also there is the problem of a key for the calculating of centroid offset, promptly barycenter is different with the benchmark of the centre of form, can't accurately obtain the numerical value of centroid offset.The benchmark of barycenter is the gravity axis by three center sensors, the benchmark of the centre of form is a turning axle, if measure the benchmark unanimity that can't guarantee the two respectively, also be difficult between the two, set up direct mathematical relation, so just can't calculate the side-play amount of barycenter exactly with respect to the centre of form.
For improving above-mentioned deficiency, new structure has been proposed, barycenter measurement and centre of form measurement are combined on the test desk, fixing LOAD CELLS below turntable, passing turntable by the liftable pin is placed on the sensor, the realization barycenter is measured, and turntable has the hole greater than the pin diameter at the pin place of passing through.After the elongation of liftable pin, measured workpiece and turntable are thrown off, and carry out barycenter and measure.The liftable pin shortens the back throws off with sensor, and measured workpiece is placed on the turntable, carries out the centre of form and measures.
Combine like this method is measured barycenter and centre of form measurement plays with building blocks, tentatively realized the unifying datum problem.But still do not carry out real consistently, and and needing the lifting workpiece, its axis also will change before and after the lifting, and not only troublesome poeration does not have the real unified problem of solution measuring basis yet.
Summary of the invention
The purpose of this utility model provides a kind of measuring mechanism that is used for Measuring Object barycenter, the centre of form and centroid offset at existing weak point in the above-mentioned prior art just.
The utility model main design thought is barycenter to be measured with the centre of form measure design on the same rotation of same test board, and make between the sensor of measuring barycenter and the turning axle and keep rotating synchronously, measured workpiece need not move after measuring barycenter and can carry out the centre of form and measure.Make the two that a common measuring basis or known two benchmark mutual relationships, the equal like this problems of measurement that can solve the barycenter centre of form and centroid offset preferably be arranged.
The purpose of this utility model can adopt following technique measures to realize:
The measuring mechanism that the utility model is used for Measuring Object barycenter, the centre of form and centroid offset comprises the rotary-tray that is arranged on the test board, be arranged on the rotary-tray three around the rotary-tray center of circle with equal mode for cloth is used to measure the LOAD CELLS of barycenter and the guide upright post by vertical setting and is installed in being used on the test board in a horizontal manner and measures the dip stick of the centre of form; The chi bar of described dip stick is a telescopic structure, and the chi bar is above, the mode movingly of bottom offset is installed on the guide upright post.
The frock tray rack that is used to prop up testee in the utility model is placed on the LOAD CELLS sensing head top that is arranged on the rotary-tray; Two horizontally disposed telescopic chi bars up and down are installed on guide upright post, on the chi bar displacement transducer are installed.
Because the utility model has adopted on same test board barycenter, the centre of form to object to measure, make the two that a common measuring basis be arranged, by between the two, setting up direct mathematical relation, solve the problems of measurement of barycenter, the centre of form and centroid offset, realize the accurate calculating of barycenter with respect to centre of form side-play amount.
Description of drawings
Fig. 1 is its distribution plan of LOAD CELLS.
Fig. 2 structural representation of the present utility model.
Embodiment
The utility model is further described below with reference to embodiment (accompanying drawing):
As shown in Figure 2, the measuring mechanism that the utility model is used for Measuring Object barycenter, the centre of form and centroid offset comprises the rotary-tray 3 that is arranged on the test board, be arranged on the rotary-tray three around the rotary-tray center of circle with equal mode for cloth is used to measure the LOAD CELLS 4 of barycenter and the guide upright post 1 by vertical setting and is installed in upper and lower two horizontally disposed telescopic chi bars 2 on the test board, and the displacement transducer that is used to measure the centre of form is installed on the chi bar; Chi bar 2 is being installed on the guide upright post 1 along the mode movingly that guide upright post 1 is done the upper and lower shifting movement; 5 on the frock pallet that is used to prop up testee 6 is placed on the LOAD CELLS sensing head top that is arranged on the rotary-tray 3.
More specifically say: the measurement of barycenter adopts three LOAD CELLS to support tested rotary body, and it distributes as shown in Figure 1, three sensors be 120 spend uniform, apart from the rotation center distance is R, P1, P2, P3 are that the component that three sensors bear can be calculated mass M and centroid position easily.
The centre of form is measured and is carried out on the rotary system of three center sensors, see Fig. 2, the variation delta Ui of radius when rotating a circle with the some cross sections of optical grating ruler measurement, one week measured and chooses N point, can draw the centre of form by mathematical processing methods, obtain to calculate the side-play amount of barycenter very soon behind center-of-mass coordinate and the centre of form coordinate with respect to the centre of form.
Claims (3)
1, a kind of measuring mechanism that is used for Measuring Object barycenter, the centre of form and centroid offset is characterized in that: this measuring mechanism comprises the rotary-tray (3) that is arranged on the test board, be arranged on the rotary-tray three around the rotary-tray center of circle with equal mode for cloth is used to measure the LOAD CELLS (4) of barycenter and is installed in being used on the test board in a horizontal manner by the guide upright post (1) that vertically is provided with and measure the dip stick of the centre of form; The chi bar (2) of described dip stick is a telescopic structure, and the chi bar is above, the mode movingly of bottom offset is installed on the guide upright post (1).
2, the measuring mechanism that is used for Measuring Object barycenter, the centre of form and centroid offset according to claim 1 is characterized in that: frock pallet (5) frame that is used to prop up testee (6) is placed on the sensing head top of the LOAD CELLS (4) that is arranged on the rotary-tray (3).
3, the measuring mechanism that is used for Measuring Object barycenter, the centre of form and centroid offset according to claim 1, it is characterized in that: two horizontally disposed telescopic chi bars (2) up and down are installed on guide upright post (1), and the chi bar is equipped with displacement transducer on (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200620031051 CN2932354Y (en) | 2006-08-10 | 2006-08-10 | A mechanism for measurement of centroid, figure center and centroid offset |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200620031051 CN2932354Y (en) | 2006-08-10 | 2006-08-10 | A mechanism for measurement of centroid, figure center and centroid offset |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2932354Y true CN2932354Y (en) | 2007-08-08 |
Family
ID=38348852
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200620031051 Expired - Lifetime CN2932354Y (en) | 2006-08-10 | 2006-08-10 | A mechanism for measurement of centroid, figure center and centroid offset |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2932354Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104101463A (en) * | 2014-07-08 | 2014-10-15 | 郑州磨料磨具磨削研究所有限公司 | Rotating body static balance measurement method |
| CN105021348A (en) * | 2015-08-07 | 2015-11-04 | 长春理工大学 | Revolving body mass center position measurement error calculation method |
-
2006
- 2006-08-10 CN CN 200620031051 patent/CN2932354Y/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104101463A (en) * | 2014-07-08 | 2014-10-15 | 郑州磨料磨具磨削研究所有限公司 | Rotating body static balance measurement method |
| CN105021348A (en) * | 2015-08-07 | 2015-11-04 | 长春理工大学 | Revolving body mass center position measurement error calculation method |
| CN105021348B (en) * | 2015-08-07 | 2017-09-26 | 长春理工大学 | A kind of revolving body centroid position measurement error computational methods |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20070808 |
|
| EXPY | Termination of patent right or utility model |