Portable measuring device for measuring gravity center of wheel type equipment

Abstract

The invention relates to the technical field of ocean engineering, in particular to a portable measuring device for measuring the weight center of gravity of wheeled equipment, which comprises a plurality of measuring seats, the measuring seats are of cuboid internal hollow structures, and guide slopes are arranged on the left side and the right side of the top surface of each measuring seat. A bearing table movably penetrates through the middle position of the top surface of the measuring seat, the bearing table is elastically connected with the bottom wall of the measuring seat, and a weighing sensor is further arranged in the measuring seat and located below the bearing table; the device is provided with a plurality of measuring seats, each measuring seat can be independently contacted with a wheel at the bottom of the to-be-measured equipment, so that the stress condition of each wheel is calculated, then the gravity center position of the to-be-measured equipment is calculated according to an internal algorithm of the controller, and compared with a traditional technology, the device can measure the gravity center of an object in an unstable offshore environment, and can also measure the gravity center of the to-be-measured equipment. And the device has the advantages of small size and easiness in storage.

Description

Technical Field

[0001] The invention relates to the technical field of marine engineering, in particular to a portable measuring device for measuring the weight centre of wheeled equipment. Background Art

[0002] Marine engineering refers to new construction, reconstruction and expansion projects that are aimed at developing, utilizing, protecting and restoring marine resources, and the main part of the project is located on the seaward side of the coastline. At present, in the field of marine engineering, large ships are often needed to transport goods to the sea, and during the transportation of goods, the goods often need to be hoisted.

[0003] In the process of lifting heavy equipment, it is of vital importance to determine the weight of the object and the position of its center of gravity, especially in application scenarios involving safety requirements. Since the weight and center of gravity of the object directly affect the stability and safety of the lifting operation, in order to prevent the object from tilting, tipping over or accidentally rotating during lifting, or to accurately adjust the object to the required specific angle, it is necessary to select appropriate lifting points based on the center of gravity of the object to ensure the balance and stability of the object during the lifting process and reduce the risk of accidents.

[0004] However, measuring the center of gravity of heavy objects during ocean transportation faces great challenges. Since ships are inevitably affected by sea waves during navigation, the hull will be unstable, such as swaying and tilting. This dynamic environment makes it difficult to ensure the accuracy of the center of gravity measurement, and the measuring instrument is easily disturbed by the movement of the hull, resulting in errors. In addition, due to the limited space of the ship, the methods that can be used to measure the center of gravity of heavy objects in ocean-going ships are also greatly limited. Therefore, it is particularly necessary to develop a measurement system that can accurately and quickly calculate the center of gravity position and weight of wheeled equipment during navigation and can operate in limited working spaces such as ships. Such a system not only helps to improve the safety of lifting operations during ocean transportation, but also ensures the efficiency and accuracy of offshore operations. To this end, we propose a portable measuring device for measuring the center of gravity of wheeled equipment to solve the above-mentioned drawbacks. Summary of the invention

[0005] The object of the present invention is to provide a portable measuring device for measuring the weight center of gravity of wheeled equipment, so as to solve the problems raised in the above background technology.

[0006] The present invention is realized by the following technical solution: a portable measuring device for measuring the weight center of wheeled equipment, comprising:

[0007] A measuring seat, wherein the number of the measuring seats is several, the measuring seat is a rectangular hollow structure, the left and right sides of the top surface of the measuring seat are provided with guide slopes, a load-bearing platform is movably provided through the middle position of the top surface of the measuring seat, the load-bearing platform is elastically connected to the bottom wall of the measuring seat, and a weighing sensor is also provided inside the measuring seat and below the load-bearing platform;

[0008] An inclination sensor and a power supply, both of which are arranged in the measuring seat, and the power supply is electrically connected to the weighing sensor and the inclination sensor;

[0009] The controller is connected to the signal output terminals of the weighing sensor and the tilt sensor for communication.

[0010] Optionally, distance measuring sensors are provided on the four side walls of the measuring seat, and the signal output ends of the distance measuring sensors are communicatively connected with the controller.

[0011] Optionally, guide columns are provided on the inner bottom surface of the measuring seat and at the four corners below the load-bearing platform. The guide columns are distributed vertically, and the bottom surface of the load-bearing platform is provided with guide grooves for inserting the guide columns. A reset spring is also sleeved on the outside of the guide column, and the two ends of the reset spring are respectively abutted against the bottom surface of the load-bearing platform and the inner bottom surface of the measuring seat. In a natural state, the top surface of the load-bearing platform is flush with the top surface of the measuring seat, and there is a gap between the load-bearing platform and the weighing sensor.

[0012] Optionally, a strip-shaped through opening is provided on the top surface of the measuring seat and on the left and right sides of the load-bearing platform, a blocking block is movably provided in the strip-shaped through opening, a support column is provided at the bottom of the blocking block for sliding along the vertical direction, and the support column is fixedly connected to the inner bottom surface of the measuring seat.

[0013] Optionally, mounting columns are provided inside the measuring seat and on the left and right sides of the load-bearing platform, and the two mounting columns are located between two blocking blocks. A first gear and a second gear are rotatably provided on the surface of the mounting column, and the first gear and the second gear are meshed with each other. A third gear is also rotatably provided on the surface of the mounting column, and the third gear and the second gear are coaxially connected. A first rack is provided on the left and right sides of the load-bearing platform, and a second rack is provided on the surface of the blocking block, and the first gear and the first rack are meshed with each other, and the third gear is meshed with the second rack.

[0014] Optionally, the radius of the first gear is consistent with that of the second gear, and the radius of the second gear is half of the radius of the third gear.

[0015] Optionally, both the front and rear sides of the top surface of the load-bearing platform are provided with embedded grooves, a main shaft is rotatably provided in the embedded groove and on one side close to the center of the load-bearing platform, and a flip plate is fixedly mounted on the outside of the main shaft.

[0016] Optionally, the external fixed sleeve of the main shaft is provided with a driven gear, the inner bottom surface of the embedded groove is slidably provided with a third rack, the third rack is meshed with the driven gear, an electromagnet is provided at one end inside the embedded groove, and a magnet is fixedly embedded at the end of the third rack close to the electromagnet; when the electromagnet is powered off, the third rack and the electromagnet are fitted together, and the flip plate is in a horizontal posture, and when the electromagnet is powered on, the facing poles of the electromagnet and the magnet are the same.

[0017] Optionally, the electromagnet is electrically connected to the power supply, and the two leads of the electromagnet are respectively connected to two conductive contacts, the two conductive contacts are respectively arranged on the inner top surfaces of the two guide grooves, the positive and negative poles of the power supply are respectively connected to two conductive sheets, the two conductive sheets are respectively arranged on the top ends of the two guide columns, and the load-bearing platform and the guide columns are both made of insulating materials; when the load-bearing platform abuts against the weighing sensor, the conductive contacts are in contact with the corresponding conductive sheets.

[0018] Optionally, a handle is provided on one side of the exterior of the measuring base, and an anti-slip pad is provided on the bottom surface of the measuring base.

[0019] Compared with the prior art, the present invention provides a portable measuring device for measuring the weight center of gravity of wheeled equipment, which has the following beneficial effects:

[0020] 1. The present invention has multiple measuring seats, each of which can contact the wheels at the bottom of the equipment to be tested separately, so as to calculate the force of each wheel, and then calculate the center of gravity of the equipment to be tested according to the internal algorithm of the controller. Compared with the traditional technology, the present invention can not only measure the center of gravity of the object in an unstable environment at sea, but also has the advantages of small size and easy storage;

[0021] 2. In the present invention, each measuring seat is provided with a distance sensor around it, which can measure the distance between two adjacent measuring seats. This design enables the system to monitor the relative position changes between various supporting points in real time without manual intervention, greatly improving the convenience and automation of measurement;

[0022] 3. When the wheel in the present invention is pressed onto the load-bearing platform, the left and right sides of the top surface of the measuring seat can simultaneously lift the blocking blocks, and the blocking blocks can confine the wheel between the two blocking blocks, thereby preventing the wheel from rolling off the measuring seat;

[0023] 4. When the wheel in the present invention is pressed onto the load-bearing platform, the flip plates on the front and rear sides of the top of the load-bearing platform can rotate towards each other at the same time, so that the wheel can be tightly held by the flip plates. When the equipment to be tested shakes with the ship, the load-bearing platform can always be tightly attached to the bottom of the wheel, avoiding misalignment between the two and affecting the measurement accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a schematic diagram of the structure of the present invention;

[0025] Figure 2 This is a schematic diagram of the structure of the measuring base of the present invention;

[0026] Figure 3 It is a transverse cross-sectional view of the measuring seat of the present invention;

[0027] Figure 4 It is a longitudinal sectional view of the measuring seat of the present invention;

[0028] Figure 5 It is a transverse partial cross-sectional view of the measuring seat of the present invention;

[0029] Figure 6 A longitudinal sectional view of the measuring seat of the present invention in another state;

[0030] Figure 7 for Figure 3 The corresponding figure at A is enlarged;

[0031] Figure 8 for Figure 4 The corresponding figure at B is enlarged;

[0032] Fig. 9 for Figure 5 The corresponding figure at C is enlarged;

[0033] Fig.10 Schematic diagram of the circuit of the present invention.

[0034] In the figure: 100, measuring seat 101, guide ramp; 102, load-bearing platform; 103, weighing sensor; 104, inclination sensor; 105, power supply; 106, distance sensor; 107, handle; 108, anti-skid pad; 109, guide groove; 110, strip-shaped through-hole; 111, first rack; 112, embedded groove; 113, main shaft; 114, flip plate; 115, driven gear; 116, third rack; 117, electromagnet; 118, magnet; 119, conductive contact; 120, conductive sheet; 200, controller; 300, guide column; 301, reset spring; 400, blocking block; 401, support column; 402, second rack; 500, mounting column; 501, first gear; 502, second gear; 503, third gear. DETAILED DESCRIPTION

[0035] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0036] Example 1: Please refer to Figure 1 - Figure 5 A portable measuring device for measuring the weight center of gravity of wheeled equipment includes a measuring seat 100 and a controller 200, wherein the number of measuring seats 100 is several, the measuring seat 100 is a rectangular hollow structure, the left and right sides of the top surface of the measuring seat 100 are provided with guide slopes 101, the middle position of the top surface of the measuring seat 100 is movably penetrated by a load-bearing platform 102, the load-bearing platform 102 is elastically connected to the bottom wall of the measuring seat 100, and a weighing sensor 103 is also provided inside the measuring seat 100 and below the load-bearing platform 102; this embodiment also includes an inclination sensor 104 and a power supply 105, the inclination sensor 104 and the power supply 105 are both arranged in the measuring seat 100, and the power supply 105 is electrically connected to the weighing sensor 103 and the inclination sensor 104; the signal output ends of the weighing sensor 103 and the inclination sensor 104 are both communicatively connected to the controller 200. The weighing sensor 103 and the inclination sensor 104 are both equipped with built-in Bluetooth modules, and the two can convert detection signals into Bluetooth signals and transmit them to the controller 200 .

[0037] Furthermore, the side walls of the measuring seat 100 are all provided with distance sensors 106, which are laser sensors, and the signal output end of the distance sensor 106 is connected to the controller 200 in communication. Specifically in this embodiment, the number of measuring seats 100 is consistent with the number of wheels of the equipment to be measured, that is, a measuring seat 100 is arranged under each wheel, and the distance sensor 106 is used to measure the distance between two adjacent measuring seats 100. This design enables the system to monitor the relative position changes between each support point in real time without manual intervention. Through accurate distance measurement, the system can adjust the calculation in a dynamic environment to ensure that the calculation of the center of gravity position of the object is more accurate.

[0038] It is worth mentioning that a handle 107 is provided on one side of the outer side of the measuring base 100, and an anti-slip pad 108 is provided on the bottom surface of the measuring base 100. The handle 107 is provided to facilitate carrying the measuring base 100, and the guide slope 101 is hingedly provided with the measuring base 100, and the function is to be foldable, reduce the storage volume, and further facilitate carrying.

[0039] Guide columns 300 are arranged on the inner bottom surface of the measuring seat 100 and at the four corners below the load-bearing platform 102. The guide columns 300 are distributed vertically. The bottom surface of the load-bearing platform 102 is provided with a guide groove 109 for inserting the guide columns 300. The outer portion of the guide columns 300 is also sleeved with a reset spring 301. The two ends of the reset spring 301 are respectively in contact with the bottom surface of the load-bearing platform 102 and the inner bottom surface of the measuring seat 100. In a natural state, the top surface of the load-bearing platform 102 is flush with the top surface of the measuring seat 100, and there is a gap between the load-bearing platform 102 and the weighing sensor 103. That is, the number of guide columns 300 is four, and the load-bearing platform 102 can slide along the axial direction of the guide columns 300. In addition, it is worth mentioning that when the load-bearing platform 102 is subjected to a downward pressure of 10N, the load-bearing platform 102 just contacts the weighing sensor 103. Specifically, when calculating the downforce of each wheel, it is only necessary to add 10N to the measurement result of the corresponding load cell 103 .

[0040] In the specific application process of this embodiment, the number of measuring seats 100 can be selected first according to the number of wheels of the equipment to be tested, and then each measuring seat 100 is placed in front of the corresponding wheel, and finally the driving mechanism, which can be an internal driving mechanism or an external traction mechanism, drives the equipment to be tested forward so that each wheel is just placed on the load-bearing platform 102. During the detection process, each measuring seat 100 is provided with a weighing sensor 103 and an inclination sensor 104, and a distance sensor 106 is also provided outside the measuring seat 100. The above three sensors transmit the measurement signals to the controller 200, and the controller 200 calculates the weight and center of gravity of the equipment to be tested according to the internal algorithm.

[0041] Example 2: Please refer to Figure 1 - Figure 5 as well as Fig. 9 In this embodiment, the top surface of the measuring seat 100 and the left and right sides of the load-bearing platform 102 are provided with strip-shaped through-holes 110, and a blocking block 400 is movably provided in the strip-shaped through-holes 110. The bottom of the blocking block 400 is provided with a support column 401 that slides along the vertical direction, and the support column 401 is fixedly connected to the inner bottom surface of the measuring seat 100, that is, the blocking block 400 can be raised and lowered. In addition, the top of the blocking block 400 is in a wedge shape, and the top of the blocking block 400 and the side facing the load-bearing platform 102 is an inclined surface.

[0042] Further, the measuring seat 100 is provided with mounting posts 500 on both the left and right sides of the load-bearing platform 102, and the two mounting posts 500 are both located between the two blocking blocks 400. The surface of the mounting posts 500 is provided with a first gear 501 and a second gear 502 for rotation, and the first gear 501 and the second gear 502 are meshed. The surface of the mounting posts 500 is also provided with a third gear 503 for rotation, and the third gear 503 and the second gear 502 are coaxially connected. The left and right sides of the load-bearing platform 102 are provided with a first rack 111, and the surface of the blocking block 400 is provided with a second rack 402, and the first gear 501 and the first rack 111 are meshed, and the third gear 503 and the second rack 402 are meshed. The radius of the first gear 501 and the second gear 502 is the same, and the radius of the second gear 502 is half of the radius of the third gear 503. In the natural state, the top surface of the load-bearing platform 102 is flush with the top surface of the measuring seat 100, and the top surface of the blocking block 400 is not higher than the top surface of the measuring seat 100; when the load-bearing platform 102 descends to abut against the weighing sensor 103, the blocking block 400 will move upward, and the moving distance of the blocking block 400 is twice the moving distance of the load-bearing platform 102. The blocking block 400 is used to block the front and rear sides of the wheel to ensure that the wheel is always on the load-bearing platform 102.

[0043] It is worth mentioning that the first gear 501 and the third gear 503 are connected via the same rotating shaft, and the rotating shaft is rotatably connected to the mounting column 500; and the second gear 502 is rotatably connected to the surface of the mounting column 500 via another rotating shaft.

[0044] In this embodiment, when the wheel of the equipment to be tested rolls along the guide ramp 101 to the top surface of the measuring seat 100, in the initial state, the blocking block 400 is retracted into the strip-shaped through-opening 110 to avoid hindering the advancement of the wheel; when the wheel passes over the strip-shaped through-opening 110 on one side and rolls onto the load-bearing platform 102, under the action of gravity, the load-bearing platform 102 descends, and the blocking blocks 400 on both sides rise to block the front and rear sides of the wheel to ensure that the wheel is always on the load-bearing platform 102.

[0045] Example 3: Please refer to Figure 1 - Fig.10In this embodiment, an embedded groove 112 is provided on both the front and rear sides of the top surface of the load-bearing platform 102. A main shaft 113 is rotatably provided in the embedded groove 112 and on one side close to the center of the load-bearing platform 102. A flip plate 114 is fixedly mounted on the outside of the main shaft 113. A driven gear 115 is fixedly sleeved on the outside of the main shaft 113, and a third rack 116 is slidably provided on the inner bottom surface of the embedded groove 112. The third rack 116 is meshed with the driven gear 115. An electromagnet 117 is provided at one end of the inner part of the embedded groove 112, and a magnet 118 is fixedly embedded at one end of the third rack 116 close to the electromagnet 117; when the electromagnet 117 is powered off, the third rack 116 and the electromagnet 117 are fitted together, and the flip plate 114 is in a horizontal posture. When the electromagnet 117 is powered on, the magnetic poles of the facing ends of the electromagnet 117 and the magnet 118 are the same, that is, under the action of repulsion, the third rack 116 can be pushed away from the electromagnet 117, thereby indirectly driving the flip plate 114 to rotate, and under the action of the two flip plates 114, the wheel is clamped together.

[0046] Furthermore, the electromagnet 117 is electrically connected to the power supply 105, and the two leads of the electromagnet 117 are respectively connected to two conductive contacts 119, which are respectively arranged on the inner top surfaces of the two guide grooves 109, and the positive and negative poles of the power supply 105 are respectively connected to two conductive sheets 120, which are respectively arranged on the top ends of the two guide columns 300, and the load-bearing platform 102 and the guide columns 300 are both made of insulating materials; when the load-bearing platform 102 abuts against the weighing sensor 103, the conductive contacts 119 are in contact with the corresponding conductive sheets 120. Since the number of guide columns 300 and the number of guide slots 109 are both four, each electromagnet 117 can correspond to two guide slots 109 respectively, and the four conductive contacts 119 are respectively located in the four guide slots 109; and the number of conductive sheets 120 is also four, two of which are connected to the positive pole of the power supply 105, and the other two are connected to the negative pole of the power supply 105; when the load-bearing platform 102 is in contact with the weighing sensor 103, the two electromagnets 117 are energized.

[0047] It is worth mentioning that the conductive contact 119 and the conductive sheet 120 are both made of copper, and the conductive sheet 120 is arched and has a certain toughness, so that the conductive contact 119 and the conductive sheet 120 can fully contact each other.

[0048] In this embodiment, when the wheel moves onto the load-bearing platform 102, under the action of gravity, the load-bearing platform 102 descends to abut against the weighing sensor 103. At this time, both electromagnets 117 are energized, and both flip plates 114 rotate toward each other, thereby clamping the wheel. In this way, when the sea water is shaking, the measuring seat 100 can always "hold" the wheel tightly, avoiding the relative position between the measuring seat 100 and the wheel from deflection and misalignment, which is conducive to improving the measurement accuracy.

[0049] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0050] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A portable measuring device for measuring the weight center of gravity of wheeled equipment, characterized in that: include: A measuring seat (100), wherein the number of the measuring seats (100) is several, the measuring seat (100) is a rectangular parallelepiped with a hollow structure inside, the left and right sides of the top surface of the measuring seat (100) are both provided with guide slopes (101), a load-bearing platform (102) is movably provided through the middle position of the top surface of the measuring seat (100), the load-bearing platform (102) is elastically connected to the bottom wall of the measuring seat (100), and a weighing sensor (103) is also provided inside the measuring seat (100) and below the load-bearing platform (102); An inclination sensor (104) and a power supply (105), wherein the inclination sensor (104) and the power supply (105) are both arranged in the measuring seat (100), and the power supply (105) is electrically connected to the weighing sensor (103) and the inclination sensor (104); The controller (200), the signal output ends of the weighing sensor (103) and the tilt sensor (104) are both communicatively connected to the controller (200).

2. A portable measuring device for measuring the weight center of gravity of wheeled equipment according to claim 1, characterized in that: The four side walls of the measuring seat (100) are each provided with a distance measuring sensor (106), and the signal output end of the distance measuring sensor (106) is communicatively connected with the controller (200).

3. A portable measuring device for measuring the weight center of gravity of wheeled equipment according to claim 1, characterized in that: Guide columns (300) are arranged on the inner bottom surface of the measuring seat (100) and at the four corners below the load-bearing platform (102). The guide columns (300) are distributed vertically. The bottom surface of the load-bearing platform (102) is provided with a guide groove (109) for the guide columns (300) to be inserted. A reset spring (301) is also sleeved on the outside of the guide column (300). The two ends of the reset spring (301) are respectively in contact with the bottom surface of the load-bearing platform (102) and the inner bottom surface of the measuring seat (100). In a natural state, the top surface of the load-bearing platform (102) is flush with the top surface of the measuring seat (100), and there is a gap between the load-bearing platform (102) and the weighing sensor (103).

4. A portable measuring device for measuring the weight center of gravity of wheeled equipment according to claim 3, characterized in that: The top surface of the measuring seat (100) and the left and right sides of the load-bearing platform (102) are both provided with strip-shaped through-openings (110), a blocking block (400) is movably provided in the strip-shaped through-openings (110), a supporting column (401) is slidably provided at the bottom of the blocking block (400) in a vertical direction, and the supporting column (401) is fixedly connected to the inner bottom surface of the measuring seat (100).

5. A portable measuring device for measuring the weight center of gravity of wheeled equipment according to claim 4, characterized in that: The measuring seat (100) is provided with mounting posts (500) on both the left and right sides of the load-bearing platform (102), and the two mounting posts (500) are located between the two blocking blocks (400). The surface of the mounting posts (500) is rotatably provided with a first gear (501) and a second gear (502), and the first gear (501) and the second gear (502) are meshed with each other. The surface of the mounting posts (500) is also rotatably provided with a third gear (503), and the third gear (503) and the second gear (502) are coaxially connected. The left and right sides of the load-bearing platform (102) are provided with a first rack (111), and the surface of the blocking block (400) is provided with a second rack (402), and the first gear (501) and the first rack (111) are meshed with each other, and the third gear (503) and the second rack (402) are meshed with each other.

6. A portable measuring device for measuring the weight center of gravity of wheeled equipment according to claim 5, characterized in that: The radius of the first gear (501) and the second gear (502) are consistent, and the radius of the second gear (502) is half of the radius of the third gear (503).

7. A portable measuring device for measuring the weight center of gravity of wheeled equipment according to claim 3, characterized in that: Both the front and rear sides of the top surface of the load-bearing platform (102) are provided with internal grooves (112), a main shaft (113) is rotatably provided in the internal groove (112) and on one side close to the center of the load-bearing platform (102), and a flip plate (114) is fixedly sleeved on the outside of the main shaft (113).

8. A portable measuring device for measuring the weight center of gravity of wheeled equipment according to claim 7, characterized in that: The main shaft (113) is fixedly sleeved with a driven gear (115) on the outside, and a third rack (116) is slidably provided on the inner bottom surface of the embedded groove (112), and the third rack (116) is meshed with the driven gear (115). An electromagnet (117) is provided at one end inside the embedded groove (112), and a magnet (118) is fixedly embedded at one end of the third rack (116) close to the electromagnet (117); when the electromagnet (117) is powered off, the third rack (116) and the electromagnet (117) are in contact with each other, and the flip plate (114) is in a horizontal posture; when the electromagnet (117) is powered on, the magnetic poles of the facing ends of the electromagnet (117) and the magnet (118) are the same.

9. A portable measuring device for measuring the weight center of gravity of wheeled equipment according to claim 8, characterized in that: The electromagnet (117) is electrically connected to the power source (105), and the two leads of the electromagnet (117) are respectively connected to two conductive contacts (119), and the two conductive contacts (119) are respectively arranged on the inner top surfaces of the two guide grooves (109). The positive and negative poles of the power source (105) are respectively connected to two conductive sheets (120), and the two conductive sheets (120) are respectively arranged on the top ends of the two guide columns (300), and the load-bearing platform (102) and the guide columns (300) are both made of insulating materials; when the load-bearing platform (102) is in contact with the weighing sensor (103), the conductive contacts (119) are in contact with the corresponding conductive sheets (120).

10. A portable measuring device for measuring the weight center of gravity of wheeled equipment according to claim 1, characterized in that: A handle (107) is provided on one side of the exterior of the measuring seat (100), and an anti-slip pad (108) is provided on the bottom surface of the measuring seat (100).

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