CN105092155A - Calibration method for center of mass of revolving body - Google Patents
Calibration method for center of mass of revolving body Download PDFInfo
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- CN105092155A CN105092155A CN201510240195.1A CN201510240195A CN105092155A CN 105092155 A CN105092155 A CN 105092155A CN 201510240195 A CN201510240195 A CN 201510240195A CN 105092155 A CN105092155 A CN 105092155A
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- standard body
- sensor
- barycenter
- mass
- quality
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Abstract
The invention relates to a calibration method for the center of mass of a revolving body. Sensors are arranged below the left side and the right side of the center of mass of a revolving body to achieve convenient data collection; the center of mass of a standard body can be obtained according to moment balance; in a test program, the object mass producing gravity P1 and gravity P2 are transmitted; an L0 measuring system is invented for operation convenience. A measuring method for taking one side of the revolving body as the center of mass XC of a reference standard body through coordinate transformation is achieved. During actual testing, L and L1 are both constant values, and only P1, P2 and L0 need to be measured. The method can effectively calibrate the center of mass of a revolving body, is improved in calibration effect, can conveniently calibrate the center of mass of a revolving body according to needs, and is convenient to use. Moreover, errors are minimized.
Description
Technical field
The present invention relates to barycenter calibration technique field, be specifically related to a kind of solid of revolution barycenter scaling method.
Background technology
Suppose two points at the two ends of an object, and 2 company's being aligneds are through object, object is with this line for rotation center, and its each part rotates to when fixing a position is when rotated the same shape, and this is standard solid of revolution.Mass centre is called for short barycenter, refers to material system be considered to mass concentration in this image point.The abbreviation of mass centre.The barycenter of system of particles is the mean place of system of particles mass distribution.
Summary of the invention
The object of the present invention is to provide a kind of solid of revolution barycenter scaling method, to demarcate for solid of revolution barycenter better, improve the degree of accuracy that barycenter is demarcated, improve it and demarcate efficiency.
For achieving the above object, technical solution of the present invention is as follows.
A kind of solid of revolution barycenter scaling method, be respectively arranged with sensor in bottom, position, the solid of revolution barycenter left and right sides, facilitate image data, the barycenter (with D head for benchmark) that can obtain standard body according to equalising torque is:
X
C＝X+L
1-L
0(1)
Wherein: X
cfor with solid of revolution head for benchmark, the barycenter of standard body; L is the distance between the sensor of front and back; L
1-L
0for the distance of front sensor distance solid of revolution head.In order to convenience of calculation can by the P of measuring instrument front portion
11, P
12sensor parallel input signal acquisition system, can think so in parallel after P
1be a sensor, only export data.According to equilibrium of forces principle, the quality of standard body be obtained, sensor P can be used
1with sensor P
2stressed sum deducts the quality of the parts that measurement bay and measurement bay are installed, that is:
P＝P
1+P
2-P
01-P
02(2)
Wherein: P is standard body quality; P
1for sensor P during loading standard body
1stressed size; P
2for sensor P during loading standard body
2stressed size; P
01for sensor P during zero load
1stressed size; P
02for sensor P during zero load
2stressed size.
In test procedure, transmission be produce P
1, P
2the mass of object of gravity, so no longer there is gravity acceleration g in computing formula, all considers by this point later if no special instructions.
In actual measurement, the position that standard body is placed on measurement bay can not be changeless, so the L in formula
1-L
0value needs to measure.For the ease of operation, invent a set of L
0measuring system, is finally realized using solid of revolution side as base standard physique heart X by coordinate conversion
cmeasuring method.
When reality is tested, L, L
1be definite value, only need measure P
1, P
2, L
0.
Instrument is after demarcating, in order to ensure its precision, need test to it with standard body, its function class is similar to counterweight, namely be put into tester with the object that known quality, barycenter, matter are inclined to get on measurement, the value measured is compared with theoretical value, misses by both the precision that extent judges instrument.For quality, barycenter we to be directly positioned on measurement bay with a standard body and to check.
The calibration of system and inspection according to being standard body, standard body is made up of the exemplar of a series of profile rule, and the quality of each standard body, physical dimension and morpheme size need accurate measurement, and pass through measurement verification.Standard body is after combination, and centroid position and the inertia size of assembly all obtain by theory calculate.After demarcation according to calibration code finishing equipment, standard body and assembly thereof are detected, detected state at least two kinds, standard body can be common to moment of inertia testing apparatus (polar moment of inertia, equator moment of inertia), barycenter eccentric testing equipment (barycenter, bias), it is test product weight (1 ± 20%) times that the weight of standard body meets, it is 1/5 ~ 5 times of measured piece inertia that the inertia of standard body meets, and after the assay was approved, tests product.
During barycenter test, the setting of partial parameters has a great impact measurement result.Wherein, measuring accuracy depends primarily on the demarcation of L value.That L represents is testing apparatus P
1, P
2distance between sensor.
This beneficial effect of the invention is: this inventive method can be demarcated for solid of revolution barycenter effectively, improves demarcation effect, and be convenient to demarcate for solid of revolution barycenter as required, easy to use, error is little.
Embodiment
The embodiment of this invention is described with embodiment below.
Embodiment
Solid of revolution barycenter scaling method in the present embodiment, is respectively arranged with sensor in bottom, position, the solid of revolution barycenter left and right sides, facilitates image data, and the barycenter (with D head for benchmark) that can obtain standard body according to equalising torque is:
X
C＝X+L
1-L
0(1)
Wherein: X
cfor with solid of revolution head for benchmark, the barycenter of standard body; L is the distance between the sensor of front and back; L
1-L
0for the distance of front sensor distance solid of revolution head.In order to convenience of calculation can by the P of measuring instrument front portion
11, P
12sensor parallel input signal acquisition system, can think so in parallel after P
1be a sensor, only export data.According to equilibrium of forces principle, the quality of standard body be obtained, sensor P can be used
1with sensor P
2stressed sum deducts the quality of the parts that measurement bay and measurement bay are installed, that is:
P＝P
1+P
2-P
01-P
02(2)
Wherein: P is standard body quality; P
1for sensor P during loading standard body
1stressed size; P
2for sensor P during loading standard body
2stressed size; P
01for sensor P during zero load
1stressed size; P
02for sensor P during zero load
2stressed size.
In test procedure, transmission be produce P
1, P
2the mass of object of gravity, so no longer there is gravity acceleration g in computing formula, all considers by this point later if no special instructions.
In actual measurement, the position that standard body is placed on measurement bay can not be changeless, so the L in formula
1-L
0value needs to measure.For the ease of operation, invent a set of L
0measuring system, is finally realized using solid of revolution side as base standard physique heart X by coordinate conversion
cmeasuring method.
When reality is tested, L, L
1be definite value, only need measure P
1, P
2, L
0.
Instrument is after demarcating, in order to ensure its precision, need test to it with standard body, its function class is similar to counterweight, namely be put into tester with the object that known quality, barycenter, matter are inclined to get on measurement, the value measured is compared with theoretical value, misses by both the precision that extent judges instrument.For quality, barycenter we to be directly positioned on measurement bay with a standard body and to check.
The calibration of system and inspection according to being standard body, standard body is made up of the exemplar of a series of profile rule, and the quality of each standard body, physical dimension and morpheme size need accurate measurement, and pass through measurement verification.Standard body is after combination, and centroid position and the inertia size of assembly all obtain by theory calculate.After demarcation according to calibration code finishing equipment, standard body and assembly thereof are detected, detected state at least two kinds, standard body can be common to moment of inertia testing apparatus (polar moment of inertia, equator moment of inertia), barycenter eccentric testing equipment (barycenter, bias), it is test product weight (1 ± 20%) times that the weight of standard body meets, it is 1/5 ~ 5 times of measured piece inertia that the inertia of standard body meets, and after the assay was approved, tests product.
During barycenter test, the setting of partial parameters has a great impact measurement result.Wherein, measuring accuracy depends primarily on the demarcation of L value.That L represents is testing apparatus P
1, P
2distance between sensor.
The above is the preferred embodiment of the present invention; it should be pointed out that for those skilled in the art, under the premise without departing from the principles of the invention; can also make some improvements and modifications, these improvements and modifications are also considered as protection scope of the present invention.
Claims (1)
1. a solid of revolution barycenter scaling method, is characterized in that: be respectively arranged with sensor in bottom, position, the solid of revolution barycenter left and right sides, facilitate image data, and the barycenter that can obtain standard body according to equalising torque is:
X
C＝X+L
1-L
0(1)
Wherein: X
cfor with solid of revolution head for benchmark, the barycenter of standard body; L is the distance between the sensor of front and back; L
1-L
0for the distance of front sensor distance solid of revolution head; In order to convenience of calculation can by the P of measuring instrument front portion
11, P
12sensor parallel input signal acquisition system, can think so in parallel after P
1be a sensor, only export data; According to equilibrium of forces principle, the quality of standard body be obtained, sensor P can be used
1with sensor P
2stressed sum deducts the quality of the parts that measurement bay and measurement bay are installed, that is:
P＝P
1+P
2-P
01-P
02(2)
Wherein: P is standard body quality; P
1for sensor P during loading standard body
1stressed size; P
2for sensor P during loading standard body
2stressed size; P
01for sensor P during zero load
1stressed size; P
02for sensor P during zero load
2stressed size;
In test procedure, transmission be produce P
1, P
2, so no longer there is gravity acceleration g in computing formula in the mass of object of gravity;
In actual measurement, the position that standard body is placed on measurement bay can not be changeless, so the L in formula
1-L
0value needs to measure; For the ease of operation, invent a set of L
0measuring system, is finally realized using solid of revolution side as base standard physique heart X by coordinate conversion
cmeasuring method;
When reality is tested, L, L
1be definite value, only need measure P
1, P
2, L
0;
Instrument is after demarcating, in order to ensure its precision, need test to it with standard body, its function class is similar to counterweight, namely be put into tester with the object that known quality, barycenter, matter are inclined to get on measurement, the value measured is compared with theoretical value, misses by both the precision that extent judges instrument; For quality, barycenter we to be directly positioned on measurement bay with a standard body and to check;
The calibration of system and inspection according to being standard body, standard body is made up of the exemplar of a series of profile rule, and the quality of each standard body, physical dimension and morpheme size need accurate measurement, and pass through measurement verification; Standard body is after combination, and centroid position and the inertia size of assembly all obtain by theory calculate; After demarcation according to calibration code finishing equipment, standard body and assembly thereof are detected, detected state at least two kinds, standard body can be common to moment of inertia testing apparatus, barycenter eccentric testing equipment, it is 1 ± 20% times of test product weight that the weight of standard body meets, it is 1/5 ~ 5 times of measured piece inertia that the inertia of standard body meets, and after the assay was approved, tests product.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510240195.1A CN105092155A (en) | 2015-05-13 | 2015-05-13 | Calibration method for center of mass of revolving body |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510240195.1A CN105092155A (en) | 2015-05-13 | 2015-05-13 | Calibration method for center of mass of revolving body |
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|---|---|
| CN105092155A true CN105092155A (en) | 2015-11-25 |
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ID=54573087
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|---|---|---|---|
| CN201510240195.1A Pending CN105092155A (en) | 2015-05-13 | 2015-05-13 | Calibration method for center of mass of revolving body |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106441708A (en) * | 2016-12-07 | 2017-02-22 | 贵州黎阳航空动力有限公司 | Double-blade lever type barycenter measuring device and measuring method thereof |
| CN106840520A (en) * | 2017-02-07 | 2017-06-13 | 广西大学 | Power assembly quality center of mass method of testing |
| CN108051142A (en) * | 2017-11-30 | 2018-05-18 | 北京卫星环境工程研究所 | 3 force-measuring type centroid measurement platform multistage integral calibrating methods |
| CN111811733A (en) * | 2020-07-01 | 2020-10-23 | 上海航天精密机械研究所 | Universal device for measuring axial rotational inertia of eccentric revolving body |
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| CN203519256U (en) * | 2013-09-23 | 2014-04-02 | 北京航天新风机械设备有限责任公司 | Rotary body centroid measurement bracket |
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| CN201133860Y (en) * | 2007-12-11 | 2008-10-15 | 天津修船技术研究所 | Revolving body static balancing instrument |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106441708A (en) * | 2016-12-07 | 2017-02-22 | 贵州黎阳航空动力有限公司 | Double-blade lever type barycenter measuring device and measuring method thereof |
| CN106840520A (en) * | 2017-02-07 | 2017-06-13 | 广西大学 | Power assembly quality center of mass method of testing |
| CN108051142A (en) * | 2017-11-30 | 2018-05-18 | 北京卫星环境工程研究所 | 3 force-measuring type centroid measurement platform multistage integral calibrating methods |
| CN108051142B (en) * | 2017-11-30 | 2019-07-05 | 北京卫星环境工程研究所 | 3 force-measuring type centroid measurement platform multistage integral calibrating methods |
| CN111811733A (en) * | 2020-07-01 | 2020-10-23 | 上海航天精密机械研究所 | Universal device for measuring axial rotational inertia of eccentric revolving body |
| CN111811733B (en) * | 2020-07-01 | 2022-06-28 | 上海航天精密机械研究所 | Universal device for measuring axial moment of inertia of eccentric revolving body |
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Application publication date: 20151125 |