Mass center measuring method
By placing pressure sensors at four test points to measure the pressure difference value and calculate the center of mass position, the problem of insufficient center of mass measurement accuracy and applicability in the prior art is solved, and high-precision center of mass measurement of large irregular objects is achieved.
Patent Information
- Application Number
- CN202411512870.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-28
- Publication Date
- 2024-12-10
AI Technical Summary
Existing centroid measurement methods such as suspension method and mathematical calculation methods have insufficient accuracy and applicability. The suspension method is cumbersome and the accuracy is affected by human factors. Mathematical calculation methods are difficult to apply to objects with complex structures and uneven density.
By placing pressure sensors at four test points, measuring the pressure difference Wx and Wy at each point, and calculating their intersection points to determine the center of mass position, it is suitable for large irregular objects, and the center of mass position can be adjusted by adding a weight plate.
It improves the accuracy of centroid measurement, reduces the influence of human factors, and can efficiently measure the center of mass positions of complex structures and irregularly shaped objects.
Smart Images
Figure CN119104222A_ABST
Abstract
Description
Technical Field
[0001] The present application relates to the technical field of centroid measurement, and in particular to a centroid measurement method. Background Art
[0002] The center of mass is the ratio of the sum of the moments of each particle of an object about a certain point to the total mass of the object. It is an important physical quantity that characterizes the mass distribution of an object. In the fields of aerospace, machinery manufacturing, and automobile industry, the accurate measurement of the center of mass position has an important impact on product performance and safety. At present, the commonly used center of mass measurement methods in engineering practice mainly adopt the hanging method and the mathematical calculation method. The hanging method is to determine the center of mass by hanging the object at different positions and recording the position of the plumb line. The principle of this method is simple, but the operation is cumbersome, requiring multiple hanging and marking, and the measurement accuracy is easily affected by human factors. The mathematical calculation method is a theoretical calculation based on the geometric size and mass distribution of the object. This method is suitable for objects with regular shapes and uniform mass distribution, but in practical applications, due to factors such as the complex internal structure of the object and the uneven distribution of material density, it is often difficult to meet the calculation conditions. Summary of the invention
[0003] The present application aims to solve at least one of the above-mentioned technical problems in the prior art to a certain extent. To this end, the present application provides a centroid measurement method, which is less affected by human factors and has higher measurement accuracy, and can measure the centroid of large and irregular objects.
[0004] A centroid measurement method comprises the following steps: Establish a plane rectangular coordinate system; Establish four test points, and determine that the coordinates of the four test points are (X1, 0), (X2, 0), (0, Y1), (0, Y2); Place pressure sensors at four test points, place the object to be tested on the pressure sensors at the four test points, and measure the pressure at each point, where the pressure at point X1 is W1, the pressure at point X2 is W3, the pressure at point Y1 is W2, and the pressure at point Y2 is W4; Calculate W1-W3=Wx; W2-W4=Wy, and determine the positions of Wx and Wy on the coordinate axis; The intersection of Wx and Wy is the location of the center of mass.
[0005] Based on the above technical solution, the embodiment of the present application has at least the following beneficial effects: According to the above technical solution, when the center of mass position of the tank needs to be adjusted, a corresponding counterweight plate can be installed inside the tank, and then the center of mass position can be detected according to the intersection of Wx and Wy measured. This center of mass measurement method is less affected by human factors, so the measurement accuracy is higher, and the center of mass can be measured even for large and irregular objects. BRIEF DESCRIPTION OF THE DRAWINGS
[0006] The present application is further described below with reference to the accompanying drawings and embodiments; Figure 1 It is a schematic diagram of the plane coordinate system of the centroid measurement method provided in the embodiment of the present application. DETAILED DESCRIPTION
[0007] In order to enable those skilled in the art to better understand the technical solutions in the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the field without creative work should fall within the scope of protection of the present application.
[0008] The following is a further detailed description of the implementation of the present application in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present application but cannot be used to limit the scope of the present application.
[0009] In the description of the embodiments of the present application, it should be noted that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, which are only for the convenience of describing the embodiments of the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the embodiments of the present application. In addition, the terms "first", "second", and "third" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.
[0010] In the description of the embodiments of the present application, it should be noted that, unless otherwise clearly specified and limited, the terms "connected" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the embodiments of the present application can be understood according to specific circumstances.
[0011] In the embodiments of the present application, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" and "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.
[0012] The center of mass is the ratio of the sum of the moments of each particle of an object about a certain point to the total mass of the object. It is an important physical quantity that characterizes the mass distribution of an object. In the fields of aerospace, machinery manufacturing, and automobile industry, the accurate measurement of the center of mass position has an important impact on product performance and safety. At present, the commonly used center of mass measurement methods in engineering practice mainly adopt the hanging method and the mathematical calculation method. The hanging method is to determine the center of mass by hanging the object at different positions and recording the position of the plumb line. The principle of this method is simple, but the operation is cumbersome, requiring multiple hanging and marking, and the measurement accuracy is easily affected by human factors. The mathematical calculation method is a theoretical calculation based on the geometric size and mass distribution of the object. This method is suitable for objects with regular shapes and uniform mass distribution, but in practical applications, due to factors such as the complex internal structure of the object and the uneven distribution of material density, it is often difficult to meet the calculation conditions.
[0013] Reference Figure 1 , the present application provides a centroid measurement method, comprising the following steps: Establish a plane rectangular coordinate system; Establish four test points, and determine that the coordinates of the four test points are (X1, 0), (X2, 0), (0, Y1), (0, Y2); Place pressure sensors at four test points, place the object to be tested on the pressure sensors at the four test points, and measure the pressure at each point, where the pressure at point X1 is W1, the pressure at point X2 is W3, the pressure at point Y1 is W2, and the pressure at point Y2 is W4; Calculate W1-W3=Wx; W2-W4=Wy, and determine the positions of Wx and Wy on the coordinate axis; The intersection of Wx and Wy is the location of the center of mass.
[0014] Taking the measurement of the center of mass of the tank as an example, a plane rectangular coordinate system is first established, and the bottom edge of the tank is pressed against the pressure sensors at four test points. The readings of the four pressure sensors are obtained, and the pressure difference Wx on the X-axis and the pressure difference Wy on the Y-axis are calculated. According to the rectangular fitting resultant force method, the intersection of Wx and Wy is determined to be the center of mass of the tank in the vertical direction.
[0015] When the center of mass position of the tank needs to be adjusted, the corresponding counterweight plate can be installed inside the tank, and then the center of mass position can be detected according to the intersection of Wx and Wy. This center of mass measurement method is less affected by human factors, so the measurement accuracy is higher, and the center of mass can be measured even for large and irregular objects.
[0016] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the embodiments of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.
[0017] The embodiments of the present application are described in detail above in conjunction with the accompanying drawings, but the present application is not limited to the above embodiments, and various changes can be made within the knowledge scope of ordinary technicians in the technical field without departing from the purpose of the present application.
Claims
1. A centroid measurement method, characterized in that: The following steps are involved: Establish a plane rectangular coordinate system; Establish four test points, and determine that the coordinates of the four test points are (X1, 0), (X2, 0), (0, Y1), (0, Y2); Place pressure sensors at four test points, place the object to be tested on the pressure sensors at the four test points, and measure the pressure at each point, where the pressure at point X1 is W1, the pressure at point X2 is W3, the pressure at point Y1 is W2, and the pressure at point Y2 is W4; Calculate W1-W3=Wx; W2-W4=Wy, and determine the positions of Wx and Wy on the coordinate axis; The intersection of Wx and Wy is the location of the center of mass.