A method and apparatus for measuring the center of mass and weight

Abstract

The application relates to a mass center and weight measuring method and a measuring device, and belongs to the technical field of measurement. The method comprises the following steps: selecting two support points on an object to be measured; placing first and second support devices at the support points to support the object, and acquiring a first support force, a first inclination angle and a distance; after the positions of the two devices are exchanged, a second support force and a second inclination angle are acquired; and the data is brought into a calculation model to calculate the weight and the mass center position. The application effectively eliminates the error introduced by the non-horizontal ground by exchanging the positions of the support devices and combining data solving, and the levelness adjustment of the support site or the support surface of the object is not needed, so that the operation process is obviously simplified. The method can realize efficient measurement under any ground conditions, meets the high-precision parameter detection requirements of heavy-load structures such as locomotives and large long-strip components, and has strong on-site adaptability.

Description

Technical Field

[0001] This application relates to the field of measurement technology, and in particular to a method and measuring device for measuring the center of mass and weight. Background Technology

[0002] With the rapid development of the rail transit, aerospace, and large machinery manufacturing industries, the demand for parameter testing of heavy-duty structural components such as locomotives and large, long, strip-shaped components is increasing. Among these, the weight and center of gravity of the object are key safety and performance indicators, directly affecting the operational stability and safety of the equipment.

[0003] In related technologies, multi-point weighing platforms or weighbridge systems are typically used for measurement. Specifically, the object to be measured is placed on a support surface composed of multiple load cells, and the total weight and center of mass are calculated by collecting the reaction forces at each support point.

[0004] However, this type of measurement method has extremely high requirements for the levelness of the support surface. In actual measurement, non-levelness of the support surface will lead to the decomposition of the gravity vector, causing the vertical component measured by the load cell to be less than the actual gravity component, thus introducing a large measurement error. Especially for large objects being measured, due to site conditions, it is difficult to ensure the consistency of flatness and levelness of all weighing platform installation points. Often, a lot of time and cost is required to level the support site, and the leveling effect is difficult to guarantee for a long time, directly affecting the accuracy of weighing and centroid calculation. Summary of the Invention

[0005] In view of the shortcomings or deficiencies mentioned in the background art, the present application provides a method and measuring device for measuring center of mass and weight, so as to solve the problems in the related art where the non-level support surface can easily introduce large measurement errors, and it is difficult to ensure the consistency of the levelness of the support points for large objects being measured, thus resulting in low accuracy of weighing and center of mass calculation.

[0006] In a first aspect, embodiments of this application provide a method for measuring the center of mass and weight, comprising: S1. Select two support points on the object to be tested; S2. Place the first support device and the second support device at two support points to support the object to be measured, and obtain the first support force of the second support device, the first tilt angle of the object to be measured, and the distance between the two support points. S3. Exchange the positions of the first support device and the second support device so that after the exchange, the first support device and the second support device are still supported at the two support points respectively. S4. Obtain the second supporting force of the second supporting device and the second tilt angle of the object to be measured; S5. Input the first tilt angle, the first support force, the second tilt angle, the second support force, and the spacing into the preset calculation model to calculate the weight and center of mass of the object to be measured.

[0007] In a first aspect, in some embodiments, the computational model includes a first moment balance equation and a second moment balance equation solved simultaneously; wherein, the first moment balance equation reflects the mechanical relationship between the first supporting force, the first tilt angle and the spacing; and the second moment balance equation reflects the mechanical relationship between the second supporting force, the second tilt angle and the spacing.

[0008] In a first aspect, in some embodiments, the computational model includes: ; ; Where L1 is the distance between the two support points, F1 is the first support force of the second support device before the position is exchanged, F2 is the second support force of the second support device after the position is exchanged, α is the first tilt angle of the object under test when F1 is applied, β is the second tilt angle of the object under test when F2 is applied, G is the weight of the object under test, and L0 is the distance from the center of mass of the object under test to the end where the fulcrum is located when F1 is applied.

[0009] In a first aspect, in some embodiments, the first torque balance equation is: ; The second torque balance equation is: ; Where L1 is the distance between the two support points, F1 is the first support force of the second support device before the position is exchanged, F2 is the second support force of the second support device after the position is exchanged, α is the first tilt angle of the object under test when F1 is applied, β is the second tilt angle of the object under test when F2 is applied, G is the weight of the object under test, and L0 is the distance from the center of mass of the object under test to the end where the fulcrum is located when F1 is applied.

[0010] In one aspect, in some embodiments, the two support points are located on the longitudinal central axis of the object under test.

[0011] In some embodiments, the first support device is a hinged support, used to provide hinged support for the object to be measured.

[0012] In some embodiments, the second support device is provided with a force sensing unit, a tilt sensing unit, and a distance sensing unit to provide support for the object under test and to measure the support force, the tilt angle of the object under test, and the distance between the object and the first support device.

[0013] In a first aspect, in some embodiments, after the exchange of positions of the first support device and the second support device, and before obtaining the second support force of the second support device and the second tilt angle of the object to be measured, the method further includes: The distance sensing unit of the second support device is used to verify the distance between the two support points. If the deviation between the verified distance and the distance exceeds a preset threshold, an alarm is output.

[0014] In some embodiments, after calculating the weight and centroid position of the object to be measured, the method further includes: The weight and center of gravity position are displayed on the display module or sent to an external terminal device via the communication module.

[0015] Secondly, embodiments of this application provide a device for measuring the center of mass and weight, comprising: The first support device is used to provide support for the object to be measured; The second support device is equipped with a force sensing unit, an tilt sensing unit and a distance sensing unit, which are used to provide support for the object under test and to measure the support force, the tilt angle of the object under test and the distance between the object and the first support device. The data processing unit is communicatively connected to the force sensing unit, tilt sensing unit and distance sensing unit of the second support device, respectively. The data processing unit is configured to: acquire the first support force, the first tilt angle, and the distance between the two support points before the position is exchanged; acquire the second support force and the second tilt angle after the position is exchanged; and input the first tilt angle, the first support force, the second tilt angle, the second support force, and the distance into a preset calculation model to calculate the weight and center of mass position of the object to be measured.

[0016] The beneficial effects of the technical solution provided in this application include: This application provides a method and apparatus for measuring the center of mass and weight. The method includes the following steps: Select two support points on the object to be tested; The first support device and the second support device are respectively placed at two support points to support the object to be measured, and the first support force of the second support device, the first tilt angle of the object to be measured, and the distance between the two support points are obtained. The positions of the first support device and the second support device are swapped so that after the swap, the first support device and the second support device are still supported at the two support points respectively; Obtain the second supporting force of the second supporting device and the second tilt angle of the object to be measured; The first tilt angle, the first support force, the second tilt angle, the second support force, and the spacing are input into the preset calculation model to calculate the weight and center of mass of the object to be measured.

[0017] Therefore, this application effectively eliminates errors introduced by ground non-levelness by performing two measurements and combining the data calculations after exchanging the positions of the support devices. This method can achieve efficient measurement under any ground conditions without requiring leveling of the support site or object support surface, significantly simplifying the operation process and reducing preparation difficulty. Simultaneously, it can meet the high-precision parameter detection requirements of heavy-duty structures such as locomotives and large, long, narrow components, and has strong field adaptability. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a schematic diagram illustrating the implementation of the measurement method in this application. Figure 1 ; Figure 2 This is a schematic diagram illustrating the implementation of the measurement method in this application. Figure 2 ; Figure 3 This is a schematic diagram showing the position of the central axis of the object under test in an embodiment of this application; Figure 4 This is a flowchart of the measurement method according to an embodiment of this application.

[0020] The attached diagram lists the components represented by each number as follows: 10. The object to be tested; 100. First support device; 200. Second support device; 300. Projection position of the center of mass on the support surface. Detailed Implementation

[0021] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0022] This application provides a method and device for measuring the center of mass and weight, which can solve the problems in related technologies where a non-horizontal support surface can easily introduce large measurement errors, and it is difficult to ensure the consistency of the horizontality of the support points for large objects being measured, thus resulting in low accuracy of weighing and center of mass calculation.

[0023] See Figures 1 to 4 As shown, the first aspect of this application provides a method for measuring the center of mass and weight, including: S1. Select two support points on the object to be tested 10; S2. Place the first support device 100 and the second support device 200 at two support points to support the object to be tested 10, and obtain the first support force of the second support device 200, the first tilt angle of the object to be tested 10, and the distance between the two support points. S3. Exchange the positions of the first support device 100 and the second support device 200 so that after the exchange, the first support device 100 and the second support device 200 are still supported at the two support points respectively. S4. Obtain the second supporting force of the second supporting device 200 and the second tilt angle of the object to be measured 10; S5. Input the first tilt angle, the first support force, the second tilt angle, the second support force, and the spacing into the preset calculation model to calculate the weight and center of mass position of the object to be measured 10.

[0024] The method for measuring the center of mass and weight in this application embodiment is based on the principle of performing two measurements at the position of the exchange support device and combining the data calculation, which effectively eliminates the measurement error caused by the ground not being level.

[0025] This method enables the measurement process to be carried out efficiently under any ground conditions without the need to adjust the level of the support site or the support surface of the object to be measured, which significantly simplifies the on-site operation process and reduces the difficulty of measurement preparation.

[0026] Meanwhile, this embodiment can meet the high-precision parameter detection requirements of heavy-duty structures such as locomotives and large long strip components, and has strong on-site adaptability and practical value.

[0027] In practice, the structure of the support device can be diversified. For example, it can adopt hydraulic support, mechanical screw or airbag support, such as hydraulic support seat, hydraulic floating support cylinder, hydraulic jack or screw jack.

[0028] The second support device 200 can measure the support force by integrating a pressure sensor. The distance between the two support points can be measured by tools such as a laser rangefinder, a wire displacement sensor, a grating ruler, or a total station; the tilt angle of the object 10 relative to the horizontal plane can be measured by instruments such as an electronic inclinometer, a MEMS (microelectromechanical systems) dual-axis inclinometer, or a frame level.

[0029] It should be noted that the above-mentioned "arbitrary ground conditions" are based on the premise that the two support devices can stably support the object under test 10. The two support devices are in surface contact or line contact with the bottom surface of the object under test 10 to ensure that the object under test 10 can maintain balance after being supported. The geometric center of each contact area is the location of the support point, and the finally calculated center of mass position is the projection position 300 of the center of mass on the support surface.

[0030] Furthermore, this application does not strictly limit the specific operation method for exchanging the positions of the first support device 100 and the second support device 200, and it can be flexibly selected according to the weight of the object to be measured 10 and the on-site working conditions. As an exemplary implementation, for large or heavy-duty objects to be measured 10, a crane can be used to assist in completing the position exchange.

[0031] Specifically, the object to be tested 10 is lifted by a crane to temporarily remove it from the support point, and the installation positions of the first support device 100 and the second support device 200 are changed manually. Then the object to be tested 10 is lowered down smoothly.

[0032] During this process, it is necessary to ensure that the first support device 100 and the second support device 200 remain supported at their original two support points after replacement, in order to guarantee the consistency of the measurement benchmark. This method utilizes existing lifting equipment, is simple to operate, and has high safety, making it suitable for on-site measurement scenarios of large components such as locomotives.

[0033] Firstly, in some alternative embodiments: see Figures 1 to 4 As shown in the embodiment of this application, a method for measuring the center of mass and weight is provided. The calculation model in this method includes a first moment balance equation and a second moment balance equation solved simultaneously. The first moment balance equation reflects the mechanical relationship between the first supporting force, the first tilt angle and the spacing. The second moment balance equation reflects the mechanical relationship between the second supporting force, the second tilt angle and the spacing.

[0034] In this embodiment, the calculation model is constructed based on the principle of static moment balance, specifically including the simultaneous solution of a first moment balance equation and a second moment balance equation. The first moment balance equation corresponds to the measurement state before the position of the support device is changed, reflecting the mechanical balance relationship between the first support force, the first inclination angle, and the spacing. The second moment balance equation corresponds to the measurement state after the support device positions are changed, reflecting the mechanical balance relationship between the second support force, the second inclination angle, and the spacing. By solving the above equations simultaneously, the error term introduced by the uneven ground can be eliminated, and the weight and center of mass position of the object to be measured 10 can be calculated.

[0035] Firstly, in some alternative embodiments: see Figures 1 to 4As shown in the embodiment of this application, a method for measuring the center of mass and weight is provided, wherein the calculation model in the method includes: ; ; Where L1 is the distance between the two support points, F1 is the first support force of the second support device 200 before the position is exchanged, F2 is the second support force of the second support device 200 after the position is exchanged, α is the first tilt angle of the object 10 under test when F1 is applied, β is the second tilt angle of the object 10 under test when F2 is applied, G is the weight of the object 10 under test, and L0 is the distance from the center of mass of the object 10 under test to the end where the fulcrum is located when F1 is applied.

[0036] In this embodiment, by constructing a specific computational model, the weight and center of mass of the object 10 under test can be directly calculated based on two measurement data. This eliminates the need for cumbersome leveling adjustments to the support site, improving measurement efficiency and on-site adaptability, making it particularly suitable for testing large, heavy-duty structures such as locomotives.

[0037] Furthermore, to facilitate determining the specific physical position of the center of mass on the object 10 to be measured, the distance L2 from the end of the fulcrum to the nearest end of the object 10 to be measured can be measured in advance during implementation. At this time, the calculated L0 and L2 are added together to obtain the distance from the projection position 300 of the center of mass on the support surface to the nearest end of the object 10 to be measured, thereby achieving precise positioning and marking of the center of mass.

[0038] Firstly, in some alternative embodiments: see Figures 1 to 4 As shown in the embodiment of this application, a method for measuring the center of mass and weight is provided, wherein the first torque balance equation in the method is: ; The second torque balance equation is: ; Where L1 is the distance between the two support points, F1 is the first support force of the second support device 200 before the position is exchanged, F2 is the second support force of the second support device 200 after the position is exchanged, α is the first tilt angle of the object 10 under test when F1 is applied, β is the second tilt angle of the object 10 under test when F2 is applied, G is the weight of the object 10 under test, and L0 is the distance from the center of mass of the object 10 under test to the end where the fulcrum is located when F1 is applied.

[0039] In this embodiment, a computational model is constructed based on the principle of mechanical torque balance. By establishing torque balance equations under two different measurement conditions, the error terms caused by uneven ground can be eliminated by solving the equations simultaneously. The core advantage is that it can achieve high-precision weight and center of mass calculation under any ground conditions without requiring complex leveling adjustments to the support site.

[0040] This not only significantly simplifies the on-site operation process and reduces the difficulty of measurement preparation, but also greatly improves the testing efficiency and adaptability for heavy-duty structures such as locomotives and large long strip components, ensuring the reliability and stability of the measurement results.

[0041] Firstly, in some alternative embodiments: see Figures 1 to 4 As shown in the embodiment of this application, a method for measuring the center of mass and weight is provided, wherein two support points are located on the longitudinal central axis of the object to be measured 10.

[0042] In this embodiment, by setting two support points on the longitudinal central axis of the object under test 10, the three-dimensional force problem can be simplified into a two-dimensional planar mechanical model. This arrangement not only ensures the lateral stability of the object under test 10 during the measurement process and prevents tilting, but also effectively avoids interference from lateral moments on the measurement results. This further improves the accuracy and solution efficiency of the calculation model, ensures the reliability of the centroid position calculation, and simplifies the calculation logic of the data processing unit.

[0043] For specific implementation, please refer to Figure 3 As shown, a spatial coordinate system is established, defining the longitudinal extension direction of the object under test 10 as the Y-axis and the lateral extension direction as the X-axis. The longitudinal centerline of the bottom surface of the object under test 10 is represented by a dashed line in the figure, and both support points are located on this longitudinal centerline. By clarifying the geometric relationship of each measurement parameter in the coordinate system, the data processing unit can easily perform coordinate transformation and numerical analysis, thereby achieving precise positioning and marking of the centroid of the object under test 10.

[0044] Firstly, in some alternative embodiments: see Figures 1 to 4 As shown in the embodiment of this application, a method for measuring the center of mass and weight is provided. In this method, the first support device 100 is a hinge support, which is used to provide hinge support for the object 10 to be measured.

[0045] In this embodiment, the first support device 100 is configured as a hinged support structure, mainly used to provide stable hinged support for the object 10 under test. The core advantage of this structural design is that it can adapt to the tilt posture of the object 10 under test, allowing the object 10 under test to rotate slightly at the support point, thereby eliminating the additional constraint torque caused by uneven ground or uneven bottom surface of the object.

[0046] By providing support conditions without horizontal constraints, the foundation for establishing the mechanical equilibrium equations is ensured. Combined with the measurement data from the second support device 200, this provides a key structural guarantee for achieving high-precision measurements without the need for site leveling.

[0047] In specific implementation, the first support device 100 can be a fixed hinge support with a single degree of freedom around an axis, or a ball joint support with multiple degrees of freedom, to achieve connection with the bottom of the object to be measured 10. In terms of installation and connection method, the support can be detachably connected to the object to be measured 10 through fasteners, which facilitates adjustment of the support point position according to the size of the object to be measured 10.

[0048] Firstly, in some alternative embodiments: see Figures 1 to 4 As shown in the embodiment of this application, a method for measuring the center of mass and weight is provided. In this method, the second support device 200 is equipped with a force sensing unit, an tilt sensing unit and a distance sensing unit, which are used to provide support for the object 10 to be measured and to measure the support force, the tilt angle of the object 10 to be measured and the distance between the object and the first support device 100.

[0049] In this embodiment, the second support device 200 integrates support and data acquisition functions, enabling simultaneous acquisition of key parameters such as support force, tilt angle, and spacing. This integrated design ensures a high degree of consistency between the measurement data and the support status, avoiding synchronization errors introduced by separate measurements.

[0050] By monitoring the attitude changes and force conditions of the object under test 10 in real time, an accurate data foundation is provided for the subsequent calculation model based on the torque balance principle, thus ensuring that high-precision weight and center of mass calculation can still be achieved under non-horizontal ground conditions, significantly improving the reliability and environmental adaptability of the measurement system.

[0051] Preferably, in terms of specific structure, the second support device 200 can adopt a hinged structure including a fixed seat and a rotating seat, with the rotating seat and the fixed seat rotatably connected to adapt to the tilt of the object. A weighing sensor can be integrated and installed on the rotating seat to measure the supporting force, and an inclination sensor can be installed to monitor the inclination angle of the rotating seat support surface, which reflects the real-time inclination angle of the object 10 to be measured.

[0052] In addition, a laser rangefinder can be installed on the side of the rotating base to measure the distance to the first support device 100 at the other end in real time. This distance is defined as the spacing between the two support points. This layout is compact and functionally clear, facilitating the maintenance of a consistent measurement reference during position changes.

[0053] In other embodiments, the specific structural form of the second support device 200 can be flexibly adjusted according to the actual working conditions. For example, the second support device 200 can also use a rigid support block to directly support the object 10 to be measured. In order to ensure stable contact between the support block and the ground and the object 10 to be measured, a pad can be used between the bottom of the support block and the ground to adjust the contact state, so that the support block can adapt to the natural tilting posture of the object 10 to be measured, without having to force the support surface to be level.

[0054] Meanwhile, a load cell, tilt sensor, and laser rangefinder are integrated and installed on the support block to acquire data on support force, tilt angle, and spacing, respectively. This structural form is simple, reliable, and low-cost, and can also be used in conjunction with the aforementioned measurement methods to achieve high-precision measurement of the center of mass and weight, further enriching the implementation options of the device.

[0055] Firstly, in some alternative embodiments: see Figures 1 to 4 As shown, this application embodiment provides a method for measuring the center of mass and weight. This method, after exchanging the positions of the first support device 100 and the second support device 200 and before obtaining the second support force of the second support device 200 and the second tilt angle of the object 10 to be measured, further includes: The distance sensing unit of the second support device 200 is used to verify the distance between the two support points. If the deviation between the verified distance and the actual distance exceeds a preset threshold, an alarm is output.

[0056] In this embodiment of the application, by introducing a spacing verification step after the position is exchanged and before the second measurement, the stability and positional consistency of the support points can be effectively monitored.

[0057] The core advantage of this step is that it can promptly detect the offset of the support point position caused by device movement, ground subsidence or object sliding, avoid calculation errors introduced by changes in spacing, and ensure that the two measurement states meet the assumptions of the calculation model.

[0058] By setting preset thresholds and outputting alarm prompts, intelligent monitoring and quality control of the measurement process are achieved, ensuring the accuracy and reliability of the final weight and centroid calculation results, and significantly reducing the risk of measurement failure due to operational errors or environmental interference.

[0059] In practice, a data processing unit, such as a controller or a computer, can be configured to communicate with the force sensing unit, tilt sensing unit and distance sensing unit of the second support device 200, respectively.

[0060] After the positions of the first support device 100 and the second support device 200 are swapped, the data processing unit controls the distance sensing unit to measure the verification distance between the two support points again and calculate the deviation between the verification distance and the initial distance.

[0061] If the deviation exceeds a preset threshold, the data processing unit controls the alarm module to output an alarm notification. The alarm may take the form of an audible and visual alarm, a screen display warning message, or a remote alarm signal sent via the communication module. This setting allows the operator to adjust the device position promptly, ensuring that the measurement conditions meet the requirements of the calculation model, thereby guaranteeing the rigor of the measurement process.

[0062] Firstly, in some alternative embodiments: see Figures 1 to 4As shown in the embodiment of this application, a method for measuring the center of mass and weight is provided. After calculating the weight and center of mass position of the object 10 to be measured, the method further includes: The weight and center of gravity position are displayed on the display module or sent to an external terminal device via the communication module.

[0063] In this embodiment of the application, after calculating the weight and center of mass of the object 10 to be measured, the data is further output through a display module or a communication module, thereby realizing the visualization and remote transmission of the measurement results.

[0064] This step allows operators to obtain measurement data intuitively and conveniently, avoiding errors that may occur with manual recording, and significantly improving the convenience and efficiency of the measurement process.

[0065] Meanwhile, it supports sending data to external terminal devices for storage or secondary analysis, which facilitates subsequent quality traceability and production management, meeting the needs of modern industrial testing for data interconnection and intelligent management.

[0066] In practice, after completing the calculation, the data processing unit transmits the weight and center of gravity position data signals to the display module for real-time display by on-site personnel. Furthermore, the data processing unit can also package and send the data to external terminal devices, such as host computers, cloud servers, or mobile terminals, via the communication module.

[0067] External terminal devices can store the received data, generate reports, or integrate it into the production management system. Through wired or wireless communication, data interaction between the measuring equipment and external systems is achieved, further expanding the application scenarios and functional scope of the equipment and ensuring the effective utilization and management of measurement data.

[0068] See Figures 1 to 4 As shown, a second aspect of this application provides a device for measuring the center of mass and weight, comprising: A first support device 100 is used to provide support for the object 10 to be measured; The second support device 200 is equipped with a force sensing unit, an tilt sensing unit and a distance sensing unit, which are used to provide support for the object 10 to be measured and to measure the support force, the tilt angle of the object 10 to be measured and the distance between it and the first support device 100. The data processing unit is communicatively connected to the force sensing unit, tilt sensing unit and distance sensing unit of the second support device 200, respectively. The data processing unit is configured to: acquire the first support force, the first tilt angle, and the distance between the two support points before the position is exchanged; acquire the second support force and the second tilt angle after the position is exchanged; and input the first tilt angle, the first support force, the second tilt angle, the second support force, and the distance into a preset calculation model to calculate the weight and center of mass position of the object to be measured 10.

[0069] In this embodiment, a high degree of automation and intelligence in the measurement process is achieved through the combination of hardware integration and algorithm presets. The device integrates the support structure and sensing functions, enabling it to adapt to uneven ground conditions and acquire high-precision weight and center-of-gravity data without the need for on-site leveling.

[0070] This integrated design not only lowers the operational threshold, but also effectively eliminates human error and environmental interference through the intelligent calculation of the data processing unit, significantly improving the detection efficiency and the reliability of the results. It is particularly suitable for rapid on-site detection of large and heavy-duty components.

[0071] In terms of specific structure, the device includes a first support device 100, a second support device 200, and a data processing unit. The first support device 100 is used to provide support for the object 10 under test; the second support device 200 integrates a force sensing unit, a tilt sensing unit, and a distance sensing unit, and is used to provide support for the object 10 under test and collect data.

[0072] The data processing unit is communicatively connected to each sensing unit of the second support device 200. It can be a controller or a computer, and has a pre-set calculation model in the aforementioned measurement method. It is configured to execute the data acquisition, calculation and output process.

[0073] In addition, the device includes a display module, a communication module, and an alarm module. The display module shows the measurement results in real time, the communication module sends data to an external terminal, and the alarm module issues a warning when the deviation in the support point spacing exceeds a preset threshold. These modules work together to form a complete measurement and monitoring system, ensuring the rigor of the measurement process and the validity of the data.

[0074] In the description of this application, it should be noted that the terms "upper," "lower," etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application. Unless otherwise expressly specified and limited, the terms "installed," "connected," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication between two elements. For those skilled in the art, the specific meaning of the above terms in this application can be understood according to the specific circumstances.

[0075] It should be noted that in this application, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0076] The above description is merely a specific embodiment of this application, enabling those skilled in the art to understand or implement this application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of this application. Therefore, this application is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features claimed herein.

Claims

1. A method for measuring the center of mass and weight, characterized in that, include: Select two support points on the object to be tested (10); The first support device (100) and the second support device (200) are respectively placed at two support points to support the object to be tested (10), and the first support force of the second support device (200), the first tilt angle of the object to be tested (10), and the distance between the two support points are obtained. The positions of the first support device (100) and the second support device (200) are swapped so that after the swap, the first support device (100) and the second support device (200) are still supported at the two support points respectively; Obtain the second supporting force of the second supporting device (200) and the second tilt angle of the object to be measured (10); The first tilt angle, the first support force, the second tilt angle, the second support force, and the spacing are input into the preset calculation model to calculate the weight and center of mass of the object to be measured (10). The calculation model includes a first moment balance equation and a second moment balance equation solved simultaneously; wherein, the first moment balance equation reflects the mechanical relationship between the first supporting force, the first inclination angle and the spacing; and the second moment balance equation reflects the mechanical relationship between the second supporting force, the second inclination angle and the spacing. The first torque balance equation is: ； The second torque balance equation is: ； Wherein, L1 is the distance between the two support points, F1 is the first support force of the second support device (200) before the position is exchanged, F2 is the second support force of the second support device (200) after the position is exchanged, α is the first tilt angle of the object to be tested (10) when F1 is applied, β is the second tilt angle of the object to be tested (10) when F2 is applied, G is the weight of the object to be tested (10), and L0 is the distance from the center of mass of the object to be tested (10) to the end where the fulcrum is located when F1 is applied.

2. The method for measuring the center of mass and weight as described in claim 1, characterized in that: The computational model includes: ； ； Wherein, L1 is the distance between the two support points, F1 is the first support force of the second support device (200) before the position is exchanged, F2 is the second support force of the second support device (200) after the position is exchanged, α is the first tilt angle of the object to be tested (10) when F1 is applied, β is the second tilt angle of the object to be tested (10) when F2 is applied, G is the weight of the object to be tested (10), and L0 is the distance from the center of mass of the object to be tested (10) to the end where the fulcrum is located when F1 is applied.

3. The method for measuring the center of mass and weight as described in claim 1, characterized in that: The two support points are located on the longitudinal central axis of the object to be tested (10).

4. The method for measuring the center of mass and weight as described in claim 1, characterized in that: The first support device (100) is a hinge support, which is used to provide hinge support for the object to be measured (10).

5. The method for measuring the center of mass and weight as described in claim 1, characterized in that: The second support device (200) is equipped with a force sensing unit, an tilt sensing unit and a distance sensing unit, which are used to provide support for the object to be measured (10) and to measure the support force, the tilt angle of the object to be measured (10) and the distance between it and the first support device (100).

6. The method for measuring the center of mass and weight as described in claim 5, characterized in that: After the exchange of positions of the first support device (100) and the second support device (200), and before obtaining the second support force of the second support device (200) and the second tilt angle of the object to be measured (10), the method further includes: The distance sensing unit of the second support device (200) is used to verify the distance between the two support points. If the deviation between the verified distance and the distance exceeds a preset threshold, an alarm prompt is output.

7. The method for measuring the center of mass and weight as described in claim 1, characterized in that: After calculating the weight and center of mass of the object to be measured (10), the method further includes: The weight and center of gravity position are displayed on the display module or sent to an external terminal device via the communication module.

8. A device for measuring center of mass and weight, characterized in that, include: A first support device (100) is used to provide support for the object to be measured (10); The second support device (200) is provided with a force sensing unit, an inclination sensing unit and a distance sensing unit, for providing support to the object to be measured (10) and measuring the support force, the inclination angle of the object to be measured (10) and the distance between it and the first support device (100). The data processing unit is communicatively connected to the force sensing unit, tilt sensing unit and distance sensing unit of the second support device (200); The data processing unit is configured to: obtain the first support force, the first tilt angle and the distance between the two support points before the position is exchanged; obtain the second support force and the second tilt angle after the position is exchanged; and input the first tilt angle, the first support force, the second tilt angle, the second support force and the distance into a preset calculation model to calculate the weight and center of mass of the object to be tested (10). The calculation model includes a first moment balance equation and a second moment balance equation solved simultaneously; wherein, the first moment balance equation reflects the mechanical relationship between the first supporting force, the first inclination angle and the spacing; and the second moment balance equation reflects the mechanical relationship between the second supporting force, the second inclination angle and the spacing. The first torque balance equation is: ； The second torque balance equation is: ； Wherein, L1 is the distance between the two support points, F1 is the first support force of the second support device (200) before the position is exchanged, F2 is the second support force of the second support device (200) after the position is exchanged, α is the first tilt angle of the object to be tested (10) when F1 is applied, β is the second tilt angle of the object to be tested (10) when F2 is applied, G is the weight of the object to be tested (10), and L0 is the distance from the center of mass of the object to be tested (10) to the end where the fulcrum is located when F1 is applied.

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