Maglev Train Center of Gravity Measurement Device

Abstract

This disclosure relates to the field of center of gravity measurement devices, and in particular to a center of gravity measurement device for a magnetic levitation train. The device includes a base, a force-measuring component, and a rotating component. The base is equipped with a state-switching device. The force-measuring component includes a force sensor, a ball socket, and a ball head. The force sensor is mounted above the state-switching device, the ball socket is mounted above the force sensor, and the ball head is mounted on the rotating component. The rotating component is used to connect with the sample to be measured. The state-switching device cooperates with the rotating component to switch the sample between a horizontal and an inclined state. In both the horizontal and inclined states, the ball head can be located within the ball socket, allowing the force sensor to detect the weight of the sample. Because the ball head is placed within the ball socket, and the ball head and ball socket have a spherical fit, the force contact position is a spherical contact, ensuring that the measuring sensor is less affected by lateral forces during force measurement, thereby improving measurement accuracy.

Description

Technical Field

[0001] This disclosure relates to the field of center of gravity measurement device technology, and in particular to a center of gravity measurement device for a magnetic levitation train. Background Technology

[0002] The center of gravity position is a very important technical parameter for maglev trains, which has a significant impact on their dynamics, braking and stability. Measuring the center of gravity position of a maglev train can guide the ballast counterweight to ensure that the center of gravity position meets the design requirements and improve the overall performance of the maglev train.

[0003] Center of gravity measurement includes horizontal and vertical center of gravity position measurement. The platform method is usually used, in which the sample to be tested is fixed on the measuring platform. When measuring the vertical center of gravity position, the measuring platform and the sample to be tested are tilted together. This measurement method is suitable for smaller samples and the supporting surface of the sample is relatively flat, which makes it easy to fix it to the measuring platform.

[0004] Maglev trains are large in size and mass, and when they tilt, the sensors are affected by lateral forces, which leads to a decrease in measurement accuracy. Summary of the Invention

[0005] The purpose of this disclosure is to provide a magnetic levitation train center of gravity measurement device to improve the accuracy of magnetic levitation train center of gravity measurement.

[0006] To achieve the above objectives, this disclosure provides a magnetic levitation train center of gravity measurement device, including a base, a force measuring component, and a rotating component. The base is equipped with a state switching device. The force measuring component includes a force sensor, a ball socket, and a ball head. The force sensor is mounted above the state switching device, the ball socket is mounted above the force sensor, and the ball head is mounted on the rotating component. The rotating component is used to connect with the sample to be measured.

[0007] The state switching device cooperates with the rotating component to switch the sample under test between a horizontal state and an inclined state; in both the horizontal and inclined states, the ball head can be located in the ball socket so that the force sensor can detect the weight value of the sample under test.

[0008] In one embodiment of this disclosure, a telescopic device is provided above the state switching device. The telescopic device is configured to extend before the sample to be tested falls, so that the ball head can be located outside the ball socket after the rotating component contacts the telescopic device; the telescopic device is also configured to retract after the rotating component contacts the telescopic device, so that the ball head is located inside the ball socket.

[0009] In one embodiment of this disclosure, a guide portion is provided above the telescopic device, and a guide mating portion is provided below the rotating assembly. The guide mating portion can cooperate with the guide portion to fix the sample to be tested above the base.

[0010] In one embodiment of this disclosure, one of the guide portion and the guide mating portion is a guide sleeve, and the other is a guide pin, wherein the guide pin can be confined within the guide sleeve.

[0011] In one embodiment of this disclosure, the magnetic levitation train center of gravity measuring device further includes an adjustment mechanism installed between the base and the state switching device. The adjustment mechanism is used to adjust the position of the ball socket so that the ball socket is aligned with the ball head.

[0012] In one embodiment of this disclosure, the adjustment mechanism includes a first direction adjustment mechanism and a second direction adjustment mechanism. The first direction adjustment mechanism includes a first mounting base, a first lead screw, and a first slider. The first mounting base is connected to the base, and the first slider is threadedly connected to the first lead screw. The first lead screw is rotatable relative to the first mounting base about its own axis, so that the first slider reciprocates along the axis of the first lead screw.

[0013] The second direction adjustment mechanism includes a second mounting base, a second lead screw, and a second slider. The second mounting base is connected to the first slider. The axis of the second lead screw is perpendicular to the axis of the first lead screw. The second slider is threadedly connected to the second lead screw. The state switching device is installed on the second slider. The second lead screw can rotate relative to the second mounting base about its own axis, so that the second slider reciprocates along the axis of the second lead screw.

[0014] In one embodiment of this disclosure, the first direction adjustment mechanism further includes a first guide rail, and the first slider is slidably connected to the first guide rail; the second direction adjustment mechanism further includes a second guide rail, and the second slider is slidably connected to the second guide rail.

[0015] In one embodiment of this disclosure, the base includes a first base and a second base; the rotating assembly includes a first rotating assembly and a second rotating assembly, the first rotating assembly and the second rotating assembly being arranged at intervals along the length direction of the sample to be tested; the state switching device includes a lifting device and a support part, the lifting device being connected to the first base, the support part being connected to the second base, the first rotating assembly being able to cooperate with the lifting device, and the second rotating assembly being able to cooperate with the support part;

[0016] The lifting device can rise so that the total height of the lifting device is greater than the height of the support and the sample to be tested is in an inclined state; or, the lifting device can fall so that the total height of the lifting device is equal to the height of the support and the sample to be tested is in a horizontal state.

[0017] In one embodiment of this disclosure, both the first rotating assembly and the second rotating assembly include two sub-rotating assemblies, each of which is provided with the ball head; each sub-rotating assembly includes a first support, a second support, and a rotating shaft, the first support and the second support are rotatably connected via the rotating shaft, the first support is used to connect with the sample to be tested, and the ball head is disposed on the side of the second support opposite to the first support.

[0018] In one embodiment of this disclosure, the lifting device includes a first lifting device and a second lifting device, the support part includes a first support part and a second support part, and the force sensor includes a first sensor, a second sensor, a third sensor and a fourth sensor. The first sensor is installed on the first lifting device, the second sensor is installed on the second lifting device, the third sensor is installed on the first support part, and the fourth sensor is installed on the second support part.

[0019] In a horizontal position, the coordinates of the centroid W of the sample under test on the X and Y axes are X, X, and Y, respectively. W and Y W , Wherein, F1, F2, F3 and F4 are the measured values ​​of the first sensor, the second sensor, the third sensor and the fourth sensor, respectively, a is the vertical distance from the first sensor to the Y-axis, b is the vertical distance from the first sensor to the X-axis, and the Y-axis is perpendicular to the X-axis;

[0020] When tilted, the coordinate of the centroid W of the sample on the Z-axis is Z. W , Among them, F 11 and F 22 These are the measured values ​​of the first sensor and the second sensor, respectively. α is the tilt angle of the sample to be tested, and the Z-axis is perpendicular to the plane containing the X-axis and Y-axis.

[0021] The main beneficial effects of this disclosure are:

[0022] The magnetic levitation train center of gravity measuring device disclosed herein, in use, involves mounting a rotating assembly onto the sample to be measured, placing a ball head within a socket, with the ball head and socket forming a spherical fit. This ensures that the force contact point is spherical, minimizing the influence of lateral forces on the measuring sensor during force measurement, thereby improving measurement accuracy. A state switching device, in conjunction with the rotating assembly, allows the sample to switch between a horizontal and an inclined state. When the sample is horizontal, the coordinates of the center of gravity in the horizontal plane are measured; when the sample is inclined, the coordinates of the center of gravity in the vertical direction are measured, thus obtaining the position of the sample's center of gravity. Attached Figure Description

[0023] To more clearly illustrate the technical solutions in the specific embodiments of this disclosure or the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this disclosure. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0024] Figure 1 A schematic diagram of the magnetic levitation train center of gravity measuring device provided in this embodiment of the present disclosure in a horizontal state;

[0025] Figure 2 A partial structural schematic diagram of the magnetic levitation train center of gravity measuring device provided in this embodiment of the present disclosure when the guide fitting part has not fallen into the guide part;

[0026] Figure 3 A partial structural schematic diagram of the magnetic levitation train center of gravity measuring device provided in this embodiment of the present disclosure, in the state where the guide fitting is inserted into the guide part and the ball head has not fallen into the ball socket;

[0027] Figure 4 A partial structural schematic diagram of the magnetic levitation train center of gravity measuring device provided in this embodiment of the present disclosure when the ball head falls into the ball socket;

[0028] Figure 5 A schematic diagram of the adjustment mechanism in the magnetic levitation train center of gravity measuring device provided in this embodiment of the disclosure;

[0029] Figure 6 This is a schematic diagram of the structure of the first direction adjustment mechanism in an embodiment of this disclosure;

[0030] Figure 7 This is a schematic diagram of the internal structure of the guide portion and the guide mating portion in an embodiment of this disclosure;

[0031] Figure 8 A schematic diagram of the magnetic levitation train center of gravity measuring device provided in this embodiment of the present disclosure in an inclined state;

[0032] Figure 9 Another structural schematic diagram of the magnetic levitation train center of gravity measuring device provided in this embodiment of the present disclosure;

[0033] Figure 10 A schematic diagram of the force analysis of the magnetic levitation train center of gravity measuring device provided in this embodiment of the present disclosure under the measurement state (the sample to be tested is in a horizontal state);

[0034] Figure 11 A schematic diagram of the force analysis of the magnetic levitation train center of gravity measuring device provided in this embodiment of the present disclosure under the measurement state (the sample to be tested is in an inclined state).

[0035] The annotations in the attached figures are explained as follows:

[0036] 101-First base; 102-Second base; 200-Adjustment mechanism; 201-First direction adjustment mechanism; 2011-First mounting base; 2012-First lead screw; 2013-First slider; 2014-First guide rail; 2015-Handwheel; 202-Second direction adjustment mechanism; 2021-Second mounting base; 2022-Second lead screw; 2023-Second slider; 2024-Second guide rail; 301-First lifting device; 302-Second lifting device; 303-First support part; 304-Second support part; 401-First bracket; 402-Second bracket; 403-Rotating shaft; 501-Force sensor; 502-Ball socket; 503-Ball head; 504-Support rod; 601-Guide part; 602-Guide mating part; 700-Telescopic device; 800-Sample to be tested; 900-Measuring control console. Detailed Implementation

[0037] The technical solutions of this disclosure will be clearly and completely described below with reference to the embodiments. Obviously, the described embodiments are only some embodiments of this disclosure, not all embodiments. Based on the embodiments of this disclosure, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this disclosure.

[0038] In the description of this disclosure, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this disclosure 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 disclosure. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0039] In the description of this disclosure, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "joining" 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; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this disclosure based on the specific circumstances.

[0040] In related technologies, the bottom of a maglev train is equipped with equipment that cannot directly bear force, making it impossible to use the platform method to measure the center of gravity. Therefore, this embodiment uses the fulcrum method to measure the center of gravity of the maglev train. The sample to be tested is fixed to several measurement points. When measuring the vertical center of gravity position, one end is used as a fulcrum, and the other end is raised, causing the sample to tilt. When tilted, the sensor is affected by the lateral component force, resulting in a decrease in measurement accuracy.

[0041] To improve measurement accuracy, see Figures 1 to 11 As shown, this embodiment provides a magnetic levitation train center of gravity measurement device, including a base, a force measuring component, and a rotating component. The base is equipped with a state switching device. The force measuring component includes a force sensor 501, a ball socket 502, and a ball head 503. The force sensor 501 is mounted above the state switching device, the ball socket 502 is mounted above the force sensor 501, and the ball head 503 is mounted on the rotating component. The rotating component is used to connect with the sample 800 to be tested. The state switching device cooperates with the rotating component to switch the sample 800 to be tested between a horizontal state and an inclined state. In both the horizontal and inclined states, the ball head 503 can be located within the ball socket 502, so that the force sensor 501 can detect the weight value of the sample 800 to be tested.

[0042] The magnetic levitation train center of gravity measuring device provided in this embodiment, during use, involves mounting the rotating assembly onto the sample 800 to be measured, placing the ball head 503 within the ball socket 502. The ball head 503 and the ball socket 502 are spherically fitted, ensuring that the force-measuring contact position is spherical. This minimizes the influence of lateral forces on the measuring sensor during force measurement, thereby improving measurement accuracy. A state switching device, in conjunction with the rotating assembly, allows the sample 800 to switch between a horizontal and an inclined state. When the sample 800 is horizontal, the coordinates of the center of gravity in the horizontal plane are measured; when the sample 800 is inclined, the coordinates of the center of gravity in the vertical direction are measured, thus obtaining the position of the center of gravity of the sample 800.

[0043] In one embodiment, a telescopic device 700 is provided above the state switching device. The telescopic device 700 is configured to extend before the sample 800 to be tested falls, so that the ball head 503 can be located outside the ball socket 502 after the rotating component contacts the telescopic device 700. The telescopic device 700 is also configured to retract after the rotating component contacts the telescopic device 700, so that the ball head 503 is located inside the ball socket 502.

[0044] Specifically, when the telescopic device 700 extends and the rotating component contacts the telescopic device 700, the ball head 503 is located outside the ball socket 502. In other words, the ball head 503 does not contact the force sensor 501, thereby avoiding the impact of the sample 800 on the force sensor 501 during the assembly process, and thus extending the service life of the force sensor 501.

[0045] When the rotating component comes into contact with the telescopic device 700, the telescopic device 700 shortens, gradually causing the ball head 503 to fall into the ball socket 502, and causing the force sensor 501 to be subjected to force for weight measurement.

[0046] For example, the telescopic device 700 can be a hydraulic cylinder, the cylinder body of which is connected to the state switching device, and the piston rod of which can contact the rotating component.

[0047] In one embodiment, a guide portion 601 is provided above the telescopic device 700, and a guide mating portion 602 is provided below the rotating component. The guide mating portion 602 can cooperate with the guide portion 601 to fix the sample 800 to be tested above the base.

[0048] When measuring the center of gravity, see Figure 1 and Figure 2 As shown, the rotating assembly can be installed at the bottom of the sample 800 to be tested first, and then the sample 800 can be lifted using a hoisting device, so that the guide mating part 602 is located above the guide part 601. See [reference needed]. Figure 3 As shown, after the guide mating part 602 is aligned with the guide part 601, the sample 800 to be tested is lowered until the rotating component and the telescopic device 700 indirectly contact each other through the mating of the guide mating part 602 and the guide part 601.

[0049] In this embodiment, see Figure 7 As shown, the guide part 601 is a guide sleeve, and the guide mating part 602 is a guide pin. The guide pin can be confined within the guide sleeve. For example, the guide sleeve has a hollow frustum-shaped inner cavity, and the guide pin has a frustum section. The end of the frustum section with a smaller diameter is the free end of the guide pin, which can play a guiding role during assembly. The frustum section can be confined within the hollow frustum-shaped inner cavity.

[0050] In other embodiments, the guide portion 601 is a guide pin, and the guide mating portion 602 is a guide sleeve.

[0051] In one embodiment, the magnetic levitation train center of gravity measuring device further includes an adjustment mechanism 200, which is installed between the base and the state switching device. The adjustment mechanism 200 is used to adjust the position of the ball socket 502 so that the ball socket 502 is aligned with the ball head 503.

[0052] Since the sample 800 to be tested is a maglev train, it is quite heavy. Once the hoisting equipment lifts it up, it will not move. At this time, if there is a deviation between the position of the ball head 503 and the ball socket 502, and it cannot be directly lowered for assembly, the position of the ball socket 502 needs to be adjusted with the help of the adjustment mechanism 200 so that the ball socket 502 and the ball head 503 are aligned.

[0053] In this embodiment, a support plate is provided on the top of the state switching device. The support plate can be rectangular in shape, and four guide sleeves are installed at the four corners of the support plate. The force sensor 501 is located at the center of the support plate. Correspondingly, the rotating assembly includes a first mounting plate, which can also be rectangular in shape. Four guide pins are also installed at the four corners of the first mounting plate, and a ball head 503 is mounted at the center of the first mounting plate via a support rod 504. See also Figure 1 and Figure 2 As shown, in practical applications, the position of the guide sleeve can be adjusted by adjusting the adjustment mechanism 200 so that the guide sleeve and the guide pin are aligned, thereby ensuring that the ball socket 502 and the ball head 503 are aligned.

[0054] See Figure 3 As shown, when the telescopic device 700 extends, and the guide pin is inside the guide sleeve, the ball head 503 is outside the ball socket 502. That is to say, the ball head 503 does not contact the force sensor 501, thereby avoiding the impact of the sample 800 on the force sensor 501 during the assembly process, thus extending the service life of the force sensor 501.

[0055] See Figure 4 As shown, when the guide pin is inside the guide sleeve, the telescopic device 700 shortens, gradually causing the ball head 503 to fall into the ball socket 502, and causing the force sensor 501 to be subjected to force for weight measurement.

[0056] In one embodiment, see Figure 5As shown, the adjustment mechanism 200 includes a first direction adjustment mechanism 201 and a second direction adjustment mechanism 202. The first direction adjustment mechanism 201 includes a first mounting base 2011, a first lead screw 2012, and a first slider 2013. The first mounting base 2011 is connected to the base, and the first slider 2013 is threadedly connected to the first lead screw 2012. The first lead screw 2012 can rotate relative to the first mounting base 2011 about its own axis, so that the first slider 2013 reciprocates along the axis of the first lead screw 2012. The second direction adjustment mechanism 202... Structure 202 includes a second mounting base 2021, a second lead screw 2022, and a second slider 2023. The second mounting base 2021 is connected to the first slider 2013. The axis of the second lead screw 2022 is perpendicular to the axis of the first lead screw 2012. The second slider 2023 is threadedly connected to the second lead screw 2022. A state switching device is installed on the second slider 2023. The second lead screw 2022 can rotate relative to the second mounting base 2021 about its own axis, so that the second slider 2023 reciprocates along the axis of the second lead screw 2022.

[0057] Specifically, the first mounting base 2011 is fixedly connected to the base. The first mounting base 2011 and the base can be connected by fasteners such as bolts and nuts, or by welding, or they can be integrally molded. See also Figure 6 As shown, the first mounting base 2011 includes a plate-like structure and baffles disposed opposite to each other at both ends of the plate-like structure. One of the baffles is provided with a threaded hole. The first lead screw 2012 is engaged with the threaded hole. One end of the first lead screw 2012 is connected to the first slider 2013. For example, the first lead screw 2012 can rotate relative to the slider along its own axis, but there is no displacement between the first lead screw 2012 and the first slider 2013 along the axial direction of the first lead screw 2012. The other end of the first lead screw 2012 is located outside the first mounting base 2011. Rotating the first lead screw 2012 can drive the first slider 2013 to reciprocate along the axis of the first lead screw 2012, thereby driving the second mounting base 2021 and the state switching device to reciprocate along the axis of the first lead screw 2012.

[0058] A handwheel 2015 can be installed at the other end of the first lead screw 2012 to facilitate the rotation of the first lead screw 2012.

[0059] Of course, the first lead screw 2012 can also be mounted on the first mounting base 2011 via a bearing. The first lead screw 2012 rotates around its own axis, driving the first slider 2013 to reciprocate along the axis of the first lead screw 2012.

[0060] The structure of the second direction adjustment mechanism 202 is basically the same as that of the first direction adjustment mechanism 201, and will not be described in detail here.

[0061] Since the axis of the second lead screw 2022 is perpendicular to the axis of the first lead screw 2012, by rotating the first lead screw 2012 and the second lead screw 2022, the positions of the first slider 2013 and the second slider 2023 are changed, thereby enabling the adjustment of the position of the state switching device and the guide sleeve installed above it in the horizontal plane, so that the guide sleeve is aligned with the guide pin.

[0062] In one embodiment, the first direction adjustment mechanism 201 further includes a first guide rail 2014, and the first slider 2013 is slidably connected to the first guide rail 2014; the second direction adjustment mechanism 202 further includes a second guide rail 2024, and the second slider 2023 is slidably connected to the second guide rail 2024.

[0063] By setting the first guide rail 2014, the movement of the first slider 2013 can be guided. By setting the second guide rail 2024, the movement of the second slider 2023 can be guided, thereby enabling precise and stable adjustment of the position of the guide sleeve.

[0064] Taking the first guide rail 2014 as an example, the first guide rail 2014 is provided with a guide groove, and the first slider 2013 is provided with a protrusion, which can slide back and forth along the length direction of the guide groove.

[0065] There are two first guide rails 2014, which are respectively arranged on both sides of the first lead screw 2012. The extension direction of the first guide rail 2014 is parallel to the axis of the first lead screw 2012.

[0066] In one embodiment, see Figure 1 As shown, the base includes a first base 101 and a second base 102; the rotating assembly includes a first rotating assembly and a second rotating assembly, which are arranged at intervals along the length of the sample 800 to be tested; the state switching device includes a lifting device and a support part, the lifting device is connected to the first base 101, and the support part is connected to the second base 102; the first rotating assembly can cooperate with the lifting device, and the second rotating assembly can cooperate with the support part; the lifting device can rise so that the total height of the lifting device is greater than the height of the support part, and the sample 800 to be tested is in an inclined state, or the lifting device can fall so that the total height of the lifting device is equal to the height of the support part, and the sample 800 to be tested is in a horizontal state.

[0067] For example, the first base 101 includes a box structure, and a reinforcing plate is provided inside the box structure. The reinforcing plate is fixedly connected between the top plate and the bottom plate of the box structure. The structure of the second base 102 is the same as that of the first base 101.

[0068] Two adjustment mechanisms 200 are provided on the first base 101, and two adjustment mechanisms 200 are also provided on the second base 102.

[0069] The lifting device includes a first lifting device 301 and a second lifting device 302, which are respectively mounted on two adjusting mechanisms 200 on the first base 101.

[0070] In this embodiment, both the first lifting device 301 and the second lifting device 302 can be hydraulic cylinders. Taking the first lifting device 301 as an example, the cylinder body of the first lifting device 301 is connected to the second slider 2023. For example, the cylinder body of the first lifting device 301 is connected to the second slider 2023 by bolts and nuts. There can be two second sliders 2023. The cylinder body of the first lifting device 301 is fixedly connected to the two second sliders 2023 to increase stability.

[0071] The support includes a first support 303 and a second support 304, which are respectively mounted on two adjustment mechanisms 200 on the second base 102.

[0072] In this embodiment, both the first support 303 and the second support 304 can be columns. For example, the length of the column can be equal to the shortest length of the first lifting device 301. When measuring the coordinates of the center of gravity in the horizontal direction, the first lifting device 301 can be retracted to its shortest length to ensure that the sample 800 to be tested is in a horizontal state.

[0073] In one embodiment, both the first rotating assembly and the second rotating assembly include two sub-rotating assemblies, each of which is provided with a ball head 503. The sub-rotating assembly includes a first support 401, a second support 402, and a rotating shaft 403. The first support 401 and the second support 402 are rotatably connected via the rotating shaft 403. The first support 401 is used to connect with the sample 800 to be tested, and the ball head 503 is disposed on the side of the second support 402 opposite to the first support 401.

[0074] To clearly describe the technical solution in this embodiment, the two sub-rotating components in the first rotating assembly are named the first sub-rotating assembly and the second sub-rotating assembly, respectively, and the two sub-rotating components in the second rotating assembly are named the third sub-rotating assembly and the fourth sub-rotating assembly, respectively. The first sub-rotating assembly and the second rotating assembly can be installed on the first lifting device 301 and the second lifting device 302, respectively, and the third sub-rotating assembly and the fourth rotating assembly can be installed on the first support part 303 and the second support part 304, respectively.

[0075] The first, second, third, and fourth sub-rotating components have the same structure. The following explanation uses the first sub-rotating component as an example.

[0076] See Figure 1 As shown, the first sub-rotating assembly includes a first bracket 401, a second bracket 402 and a rotating shaft 403. The first bracket 401 and the second bracket 402 are rotatably connected through the rotating shaft 403. The first bracket 401 is used to connect with the sample 800 to be tested. The ball head 503 is disposed on the side of the second bracket 402 opposite to the first bracket 401.

[0077] The first support 401 includes a first plate portion and first side plates symmetrically arranged on both sides of the first plate portion. The first plate portion is used to fix and connect with the sample 800 to be tested. The second support 402 includes a second plate portion and second side plates symmetrically arranged on both sides of the second plate portion. A ball head 503 is arranged on the side of the second plate portion away from the first plate portion via a support rod 504. The two second side plates are located between the two first side plates. A rotating shaft 403 passes through the two first side plates and the two second side plates and is connected by a bearing, so that the first support 401 can rotate relative to the second support 402 around the axis of the rotating shaft 403.

[0078] Specifically, see Figure 8 As shown, after the ball head 503 falls into the ball socket 502, when the first lifting device 301 and the second lifting device 302 rise a certain distance, the first sub-rotating assembly and the second sub-rotating assembly rise synchronously, while the heights of the third sub-rotating assembly and the fourth sub-rotating assembly remain unchanged. At this time, the first support 401 in the first sub-rotating assembly, the second sub-rotating assembly, the third sub-rotating assembly and the fourth sub-rotating assembly all rotate relative to the second support 402 around their respective rotating axes 403, so that the sample 800 to be tested is in an inclined state, so as to facilitate the measurement of the coordinates of the center of gravity of the sample 800 to be tested in the vertical direction.

[0079] In one embodiment, the force sensor 501 includes a first sensor, a second sensor, a third sensor, and a fourth sensor. The first sensor is mounted on the first lifting device 301, the second sensor is mounted on the second lifting device 302, the third sensor is mounted on the first support part 303, and the fourth sensor is mounted on the second support part 304. For example, the first lifting device 301, the second lifting device 302, the first support part 303, and the second support part 304 are all provided with support plates. The first sensor, the second sensor, the third sensor, and the fourth sensor are respectively located at the center of the corresponding support plates. The first sensor, the second sensor, the third sensor, and the fourth sensor are respectively provided with ball sockets 502, which correspond one-to-one with the ball heads 503 on the first sub-rotation assembly, the second sub-rotation assembly, the third sub-rotation assembly, and the fourth sub-rotation assembly.

[0080] See Figure 10 As shown, in a horizontal position, the coordinate of the center of gravity W of the sample 800 on the X-axis is X. W According to the torque balance equation: (F1+F2)·a+X W ·G=(F3+F4)·a, where a is the vertical distance from the first sensor to the Y-axis; the centroid W of the sample 800 is denoted as Y on the Y-axis. W According to the torque balance equation: (F2+F3)·b+Y W ·G=(F1+F4)·b, b is the vertical distance from the first sensor to the X-axis, and the Y-axis is perpendicular to the X-axis; F1, F2, F3 and F4 are the measured values ​​of the first sensor, the second sensor, the third sensor and the fourth sensor, respectively, and G is the weight of the sample 800 to be tested, G=F1+F2+F3+F4.

[0081] When installing the rotating assembly to the bottom of the sample 800, connectors such as bolts and nuts are required. Considering the weight of the connectors, two measurement states must be considered during the measurement process: loaded measurement and unloaded measurement. Loaded measurement includes both the sample 800 and the connectors, while unloaded measurement only includes the connectors. i =F i l -F i u Where i takes the values ​​1, 2, 3, 4, and F i l represents the reading of the i-th sensor during the load measurement, F i u Let be the reading of the i-th sensor during no-load measurement.

[0082] The coordinates of the centroid W of the sample 800 on the X-axis were obtained through calculation. The coordinate of the centroid W of the sample under test 800 on the Y-axis

[0083] See Figure 11 As shown, in the tilted state, the tilt angle of the sample 800 is α, and the coordinate of the centroid W of the sample 800 on the Z-axis is Z. W According to the torque balance equation: (F 11 +F 22 )·L=G·e, where L=2acosα, e=(aX W -Z W tanα)·cosα,F 11 and F 22The tilt angles of the sample 800 to be tested are the measured values ​​of the first and second sensors, respectively. Since the fulcrum is located at the end where the third and fourth sensors are located when the sample is tilted, the torque of the force measured by the third and fourth sensors about the fulcrum is 0. In other words, the measured values ​​of the third and fourth sensors do not need to be considered in the calculation.

[0084] The coordinates of the centroid W of the sample 800 on the Z-axis were obtained through calculation. The Z-axis is perpendicular to the plane containing the X-axis and Y-axis.

[0085] In one embodiment, see Figure 9 As shown, the magnetic levitation train center of gravity measurement device also includes a measurement control console 900, which includes hardware and software components and can realize functions such as sending system control commands, acquiring measurement data, calculating center of gravity parameters, displaying measurement structures, and storing data.

[0086] For example, the measurement console 900 can be an existing programmable logic controller (PLC).

[0087] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this disclosure, and are not intended to limit them. Although this disclosure has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this disclosure.

Claims

1. A device for measuring the center of gravity of a magnetic levitation train, characterized in that, The device includes a base, a force measuring component, and a rotating component. The base is equipped with a state switching device. The force measuring component includes a force sensor, a ball socket, and a ball head. The force sensor is mounted above the state switching device, the ball socket is mounted above the force sensor, and the ball head is mounted on the rotating component. The rotating component is used to connect to the sample to be tested. The state switching device cooperates with the rotating component to switch the sample to be tested between a horizontal state and an inclined state; in both the horizontal state and the inclined state, the ball head can be located in the ball socket so that the force sensor can detect the weight value of the sample to be tested. The base includes a first base and a second base; the rotating assembly includes a first rotating assembly and a second rotating assembly, which are arranged at intervals along the length of the sample to be tested; the state switching device includes a lifting device and a support part, the lifting device is connected to the first base, the support part is connected to the second base, the first rotating assembly can cooperate with the lifting device, and the second rotating assembly can cooperate with the support part; The lifting device can rise so that the total height of the lifting device is greater than the height of the support and the sample to be tested is in an inclined state; or, the lifting device can fall so that the total height of the lifting device is equal to the height of the support and the sample to be tested is in a horizontal state. Both the first rotating assembly and the second rotating assembly include two sub-rotating assemblies, and each sub-rotating assembly is provided with the ball head; each sub-rotating assembly includes a first support, a second support, and a rotating shaft, the first support and the second support are rotatably connected through the rotating shaft, the first support is used to connect with the sample to be tested, and the ball head is provided on the side of the second support opposite to the first support; The lifting device includes a first lifting device and a second lifting device, the support part includes a first support part and a second support part, and the force sensor includes a first sensor, a second sensor, a third sensor and a fourth sensor. The first sensor is installed on the first lifting device, the second sensor is installed on the second lifting device, the third sensor is installed on the first support part, and the fourth sensor is installed on the second support part. In a horizontal position, the coordinates of the centroid W of the sample under test on the X and Y axes are respectively... and , , ,in, , , and These are the measurement values ​​from the first, second, third, and fourth sensors, respectively. The vertical distance from the first sensor to the Y-axis is denoted as . The vertical distance from the first sensor to the X-axis is given, and the Y-axis is perpendicular to the X-axis. When tilted, the coordinates of the centroid W of the sample on the Z-axis are: , ,in, and These are the measured values ​​from the first sensor and the second sensor, respectively. The Z-axis represents the tilt angle of the sample to be tested, and it is perpendicular to the plane containing the X-axis and Y-axis.

2. The magnetic levitation train center of gravity measuring device according to claim 1, characterized in that, A telescopic device is provided above the state switching device. The telescopic device is configured to extend before the sample to be tested falls, so that the ball head can be located outside the ball socket after the rotating component contacts the telescopic device. The telescopic device is also configured to shorten after the rotating assembly contacts the telescopic device, so that the ball head is located within the ball socket.

3. The magnetic levitation train center of gravity measuring device according to claim 2, characterized in that, A guide portion is provided above the telescopic device, and a guide mating portion is provided below the rotating component. The guide mating portion can cooperate with the guide portion to fix the sample to be tested above the base.

4. The magnetic levitation train center of gravity measuring device according to claim 3, characterized in that, One of the guide portion and the guide mating portion is a guide sleeve, and the other is a guide pin, wherein the guide pin can be confined within the guide sleeve.

5. The magnetic levitation train center of gravity measuring device according to any one of claims 1 to 4, characterized in that, It also includes an adjustment mechanism, which is installed between the base and the state switching device. The adjustment mechanism is used to adjust the position of the ball socket so that the ball socket is aligned with the ball head.

6. The magnetic levitation train center of gravity measuring device according to claim 5, characterized in that, The adjustment mechanism includes a first direction adjustment mechanism and a second direction adjustment mechanism. The first direction adjustment mechanism includes a first mounting base, a first lead screw and a first slider. The first mounting base is connected to the base. The first slider is threadedly connected to the first lead screw. The first lead screw can rotate relative to the first mounting base about its own axis so that the first slider reciprocates along the axis of the first lead screw. The second direction adjustment mechanism includes a second mounting base, a second lead screw, and a second slider. The second mounting base is connected to the first slider. The axis of the second lead screw is perpendicular to the axis of the first lead screw. The second slider is threadedly connected to the second lead screw. The state switching device is installed on the second slider. The second lead screw can rotate relative to the second mounting base about its own axis, so that the second slider reciprocates along the axis of the second lead screw.

7. The magnetic levitation train center of gravity measuring device according to claim 6, characterized in that, The first direction adjustment mechanism further includes a first guide rail, and the first slider is slidably connected to the first guide rail; the second direction adjustment mechanism further includes a second guide rail, and the second slider is slidably connected to the second guide rail.

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