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A centroid detection device and method

A detection device and detection method technology, applied in the direction of measuring device, machine/structural component test, static/dynamic balance test, etc., can solve the problems of low precision, difficult to eliminate processing error and operation error, complicated operation, etc., to achieve The effect of reducing the introduction of error and improving the test accuracy

Active Publication Date: 2021-11-23
佛山智异科技开发有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Aiming at the above defects or improvement needs of the prior art, the present invention provides a centroid detection device and method, the purpose of which is to simplify the centroid test device and improve the corresponding measurement method, only one load cell is used, and multiple dynamic readings are The center of mass test results can be obtained, thereby avoiding the problems of processing errors between multiple load cells and inconsistent prior laws, and at the same time, the test steps can be adjusted according to the test accuracy to further reduce the sensor sensitivity error, thus solving the existing centroid test technology Obtaining the center of mass test or multiple clamping through multiple load cells, processing errors and / or operating errors are difficult to eliminate, complex operations, and low precision technical problems

Method used

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  • A centroid detection device and method

Examples

Experimental program
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Embodiment 1

[0044] A centroid testing device such as figure 1 As shown, it includes a turntable 104, a turntable angle sensor 106, and a support mechanism, and the support mechanism includes: a force plate 103, a load cell 105, a support plate 102, a support hinge 101 and a force plate angle sensor 107;

[0045] The rotation axis of the turntable 104 is vertically arranged in the force plate 103, and the force plate 103 is used to support the turntable 104, and the rotation axis is provided with a device for reading the angle θ of the turntable 104. A turntable angle sensor 106; the turntable 104 is used to fix the test object.

[0046] The force plate 103 and the support plate 102 are arranged in parallel, and the load cell 105 is arranged between the two. The test direction of the force sensor 105 is parallel to the normal direction of the force plate 103, and is used to measure the load cell 105. The normal phase pressure F of the force plate 103 on the support plate 102 .

[0047] T...

Embodiment 2

[0049] Utilize the centroid test device that embodiment 1 provides to carry out centroid test step as follows:

[0050] (1) Make the supporting surface of the object to be measured in the γ-plane at an angle to the horizontal plane, where 0°<γ<90°; details are as follows:

[0051] The object to be tested is fixed on the rotating disc of the centroid testing device provided in Embodiment 1. In the initial state, the force plate 103 is at a horizontal position or at any position with a known inclination angle. Drive the support plate 102 to rotate along the hinge 101 until the reading of the force plate angle sensor is 0°<γ<90°.

[0052] (2) using the coordinates of the center of mass of the object to be measured as a parameter, establishing a mathematical relationship between it and the normal pressure on the support surface;

[0053] according to figure 2 Establish the mechanism coordinate system. It is required that the origins of all coordinate systems be arranged on the...

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Abstract

The invention discloses a centroid detection device and method. The device includes a rotating table with a readable rotation angle and a load cell. The rotating table is at an angle γ to the horizontal plane. The load cell is directly or indirectly connected to the rotating table to measure the normal pressure of the rotating table; the rotating table is used for fixed testing object. The method includes: (1) making the support surface of the object to be measured in the γ plane which forms an angle with the horizontal plane; (2) taking the coordinates of the center of mass of the object to be measured as parameters to establish a mathematical relationship between it and the normal pressure of the support surface; (3) according to The known variation changes the position of the center of mass of the object to be measured to change the normal pressure of its support surface; (4) According to the multiple changes in the center of mass and the value of the normal pressure of the support surface, the coordinates of the center of mass of the object to be measured are obtained by parameter fitting . The invention adopts a single force measuring sensor to test the center of mass, reducing the error introduced by the sensor; only one clamping is required in the testing process, and the error introduced by repeated clamping is reduced.

Description

technical field [0001] The invention belongs to the field of mechanical dynamics testing, and more specifically relates to a center-of-mass testing device and method based on single-point lateral force. Background technique [0002] The accuracy of the position of the center of mass of the mechanical structure directly affects the accuracy of the structural dynamics control. The center of mass test has a wide demand in many fields that require precise control, such as spacecraft, industrial robots, and military products. [0003] All walks of life have set standards for the mass center of mass characteristics of various products many years ago, and developed a series of measurement theories and measurement systems based on this. Basically, the method of static testing is adopted. During the test, the test object remains in a static state, and multiple load cells are used to calculate the position of the center of mass through the distribution of gravity on multiple sensors. ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01M1/12
CPCG01M1/122
Inventor 朱明陶飞夏锐吴珩杨兆万周艳红
Owner 佛山智异科技开发有限公司
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