A wheeled vehicle grounding parameter measurement device and method

Abstract

The present invention discloses a device and method for measuring the ground contact parameters of a wheeled vehicle, which relates to the field of automobile measurement technology. The device comprises: a pair of wheel detection structures arranged side by side, the wheel detection structure comprising a measurement platform and two recessed areas spaced apart on the measurement platform; a plurality of pressure sensors are arranged in the recessed areas; the bottom surface of the pressure sensor is connected to the top surface of the recessed area via a micro spring, the micro spring on the bottom surface of the pressure sensor is provided with a raised micro travel switch around the center of the area, and the pressure sensor is electrically connected to the corresponding raised micro travel switch; a data analysis component connected to the pressure sensor and the raised micro travel switch signal, which is used to calculate the single-wheel ground contact area and single-wheel ground contact pressure corresponding to each wheel of the vehicle to be tested. The present application measures the wheel ground contact parameters based on a specific terrain structure in combination with multiple pressure sensors, effectively ensuring the reliability of the measurement results while improving measurement efficiency.

Description

Technical Field

[0001] The present invention relates to the technical field of automobile measurement, and in particular to a device and method for measuring ground contact parameters of a wheeled vehicle. Background Art

[0002] Ground contact area and ground contact pressure are important design parameters for wheeled vehicles. Taking wheeled off-road vehicles as an example, the ground contact pressure value determines the road conditions that the vehicle can pass. In existing testing methods, the ground contact area and ground contact pressure of wheeled vehicles mainly rely on weighing each wheel first, and then returning to the measuring room to measure the tire ground contact area. The tire ground contact area is measured by using a jack to lift each wheel of the vehicle, paint it, place coordinate paper under the tire, and then drop the tire to obtain the tire mark. Vehicles with air suspension have higher tire travel, so the requirements for the jack are more stringent. At the same time, during the tire falling process, the tire surface cannot be perpendicular to the coordinate paper, resulting in the measured tire mark area being smaller than the actual tire ground contact area, and the measurement result has large errors. The ground contact area of ​​each tire needs to be measured separately, and the repeated operation makes the measurement time-consuming and inefficient.

[0003] Therefore, in order to meet practical needs, a wheeled vehicle ground contact parameter measurement device is provided. Summary of the Invention

[0004] In response to the defects existing in the prior art, the purpose of the present invention is to provide a wheeled vehicle ground contact parameter measurement device and method, which measures the wheel ground contact parameters based on a specific terrain structure in combination with multiple pressure sensors, effectively ensuring the reliability of the measurement results while improving the measurement efficiency.

[0005] In order to achieve the above purpose, the technical solution adopted by the present invention is:

[0006] In a first aspect, the present application provides a wheeled vehicle ground contact parameter measurement device, the device comprising:

[0007] a pair of wheel detection structures arranged side by side, each wheel detection structure comprising a measuring platform and two recessed areas spaced apart from each other on the measuring platform;

[0008] A plurality of pressure sensors are arranged in the recessed area;

[0009] The bottom surface of the pressure sensor is connected to the top surface of the recessed area via a micro spring. A raised micro travel switch is provided around the center of the area of ​​the micro spring on the bottom surface of the pressure sensor. The pressure sensor is electrically connected to the corresponding raised micro travel switch.

[0010] The data analysis component is connected to the pressure sensor and the raised micro-motion travel switch signal, and is used to calculate the single wheel contact area and single wheel contact pressure corresponding to each wheel of the vehicle to be tested.

[0011] It should be noted that when a vehicle drives onto the wheeled vehicle ground contact parameter measuring device, both the left and right wheels enter the corresponding recessed areas;

[0012] The wheel presses the pressure sensor, the inching spring contracts, and the space below the raised inching travel switch is gradually squeezed. Eventually, the lower end of the raised inching travel switch is touched, or even in close contact with the surface of the recessed area, and is turned on and enters the on state. At this time, the data analysis component can receive the on signal of the raised inching travel switch and the monitoring data of the pressure sensor.

[0013] It can be found that the normal state of the raised micro-stroke switch is the disconnected state.

[0014] It should be noted that the raised micro-motion travel switch is connected in series with the corresponding pressure sensor, and the raised micro-motion travel switches can be connected in parallel.

[0015] It can be seen from this that the four recessed areas are actually the measurement areas of the four wheels.

[0016] On the basis of the above technical solution, a plurality of pressure sensors arranged in rows and columns are provided in the recessed area.

[0017] Specifically, an A*B lattice arrangement may be adopted.

[0018] It should be noted that each of the pressure sensors can be configured with an independent power supply for independent power supply.

[0019] Based on the above technical solution, the pressure sensors are distributed all over the surface of the recessed area.

[0020] More specifically, when the pressure sensors are fully squeezed, they are in close contact with the surface of the recessed area, that is, the number and arrangement of the pressure sensors completely fit the contour and size of the surface of the recessed area.

[0021] On the basis of the above technical solution, a group of symmetrical sides of the measurement platform are provided with an ascending slope and a descending slope.

[0022] On the basis of the above technical solution, a pair of the wheel detection structures are slidably arranged side by side on the sliding guide rail.

[0023] On the basis of the above technical solution, a pair of the wheel detection structures are slidably arranged side by side on a plurality of sliding guide rails arranged side by side;

[0024] The length direction of the wheel detection structure is perpendicular to the length direction of the sliding guide rail.

[0025] Based on the above technical solution, the sliding direction of the wheel detection structure is the same as the length direction of the sliding guide rail.

[0026] Specifically, the number of the sliding guide rails may be three, and they may be arranged at equal intervals;

[0027] A pair of wheel detection structures are slidable and can be adjusted at any time according to the different wheel spacings of the vehicles. After the spacing is determined, they are fixed by a locking pin structure.

[0028] On the basis of the above technical solution, the device is equipped with a single wheel contact area calculation formula, which is:

[0029] in,

[0030] A is the contact area of ​​a single wheel, a is the side length of the pressure sensor, and t is the number of the pressure sensors in the recessed area of ​​the corresponding wheel that are in the connected state;

[0031] The top surface of the pressure sensor is square.

[0032] It should be noted that the single wheel contact area calculation formula can also be converted to:

[0033] in,

[0034] A is the contact area of ​​a single wheel, S is the top surface area of ​​the pressure sensor, and t is the number of the pressure sensors in the connected state in the recessed area of ​​the corresponding wheel.

[0035] On the basis of the above technical solution, the device is equipped with a single wheel ground contact pressure calculation formula, which is:

[0036] in,

[0037] F is the ground pressure of a single wheel, f t is the pressure value of the pressure sensor, and t is the number of the pressure sensors in the recessed area of ​​the corresponding wheel that are in the connected state.

[0038] On the basis of the above technical solution, the device is equipped with a single wheel ground contact pressure calculation formula, which is:

[0039] in,

[0040] M is the single wheel ground contact pressure, F is the single wheel ground contact pressure, and A is the single wheel ground contact area.

[0041] It should be noted that the single-wheel contact area calculation formula and the single-wheel contact pressure calculation formula can be provided to the data analysis component to calculate the single-wheel contact area and single-wheel contact pressure corresponding to each wheel of the vehicle to be tested.

[0042] In a second aspect, the present application further provides a measurement method based on the wheeled vehicle ground contact parameter measurement device mentioned in the first aspect, the measurement method comprising the following steps:

[0043] Driving the wheels on both sides of the vehicle to be tested onto a pair of wheel detection structures, with all four wheels of the vehicle to be tested driving into the recessed area;

[0044] Calculating the contact area of ​​each wheel of the vehicle to be tested based on the number of pressure sensors in the connected state in each recessed area and the top surface area of ​​the pressure sensors;

[0045] Based on the number of the pressure sensors in the connected state in each of the recessed areas and the pressure values ​​of each of the pressure sensors, the single wheel ground contact pressure corresponding to each wheel of the vehicle to be tested is calculated.

[0046] It should be noted that the technical solution of this application is based on a wheeled vehicle ground contact parameter measurement device, which includes:

[0047] a pair of wheel detection structures arranged side by side, each wheel detection structure comprising a measuring platform and two recessed areas spaced apart from each other on the measuring platform;

[0048] A plurality of pressure sensors are arranged in the recessed area;

[0049] The bottom surface of the pressure sensor is connected to the top surface of the recessed area via a micro spring. A raised micro travel switch is provided around the center of the area of ​​the micro spring on the bottom surface of the pressure sensor. The pressure sensor is electrically connected to the corresponding raised micro travel switch.

[0050] The data analysis component is connected to the pressure sensor and the raised micro-motion travel switch signal, and is used to calculate the single wheel contact area and single wheel contact pressure corresponding to each wheel of the vehicle to be tested.

[0051] It should be noted that when a vehicle drives onto the wheeled vehicle ground contact parameter measuring device, both the left and right wheels enter the corresponding recessed areas;

[0052] The wheel presses the pressure sensor, the inching spring contracts, and the space below the raised inching travel switch is gradually squeezed. Eventually, the lower end of the raised inching travel switch is touched, or even in close contact with the surface of the recessed area, and is turned on and enters the on state. At this time, the data analysis component can receive the on signal of the raised inching travel switch and the monitoring data of the pressure sensor.

[0053] It can be found that the normal state of the raised micro-stroke switch is the disconnected state.

[0054] It should be noted that the raised micro-motion travel switch is connected in series with the corresponding pressure sensor, and the raised micro-motion travel switches can be connected in parallel.

[0055] It can be seen from this that the four recessed areas are actually the measurement areas of the four wheels.

[0056] On the basis of the above technical solution, a plurality of pressure sensors arranged in rows and columns are provided in the recessed area.

[0057] Specifically, an A*B lattice arrangement may be adopted.

[0058] It should be noted that each of the pressure sensors can be configured with an independent power supply for independent power supply.

[0059] On the basis of the above technical solution, the pressure sensors are distributed all over the surface of the recessed area;

[0060] More specifically, when the pressure sensors are fully squeezed, they are in close contact with the surface of the recessed area, that is, the number and arrangement of the pressure sensors completely fit the contour and size of the surface of the recessed area.

[0061] On the basis of the above technical solution, a group of symmetrical sides of the measurement platform are provided with an ascending slope and a descending slope.

[0062] On the basis of the above technical solution, a pair of the wheel detection structures are slidably arranged side by side on the sliding guide rail.

[0063] On the basis of the above technical solution, a pair of the wheel detection structures are slidably arranged side by side on a plurality of sliding guide rails arranged side by side;

[0064] The length direction of the wheel detection structure is perpendicular to the length direction of the sliding guide rail.

[0065] Based on the above technical solution, the sliding direction of the wheel detection structure is the same as the length direction of the sliding guide rail.

[0066] Specifically, the number of the sliding guide rails may be three, and they may be arranged at equal intervals;

[0067] A pair of wheel detection structures are slidable and can be adjusted at any time according to the different wheel spacings of the vehicles. After the spacing is determined, they are fixed by a locking pin structure.

[0068] When a sliding guide rail is provided, the measurement method further includes the following steps before the above steps:

[0069] Based on the wheelbase of the vehicle to be tested, the spacing between the pair of wheel detection structures is adjusted so that the spacing between the pair of wheel detection structures is the same as the wheelbase of the vehicle to be tested.

[0070] On the basis of the above technical solution, the method is configured with a single wheel contact area calculation formula, which is:

[0071] in,

[0072] A is the contact area of ​​a single wheel, a is the side length of the pressure sensor, and t is the number of the pressure sensors in the recessed area of ​​the corresponding wheel that are in the connected state;

[0073] The top surface of the pressure sensor is square.

[0074] It should be noted that the single wheel contact area calculation formula can also be converted to:

[0075] in,

[0076] A is the contact area of ​​a single wheel, S is the top surface area of ​​the pressure sensor, and t is the number of the pressure sensors in the connected state in the recessed area of ​​the corresponding wheel.

[0077] On the basis of the above technical solution, the method is configured with a single wheel ground contact pressure calculation formula, which is:

[0078] in,

[0079] F is the ground pressure of a single wheel, f t is the pressure value of the pressure sensor, and t is the number of the pressure sensors in the recessed area of ​​the corresponding wheel that are in the connected state.

[0080] On the basis of the above technical solution, the method is configured with a single wheel ground contact pressure calculation formula, which is:

[0081] in,

[0082] M is the single wheel ground contact pressure, F is the single wheel ground contact pressure, and A is the single wheel ground contact area.

[0083] Compared with the prior art, the advantages of the present invention are:

[0084] The present invention measures the wheel contact parameters based on a specific terrain structure in combination with multiple pressure sensors, effectively ensuring the reliability of the measurement results while improving the measurement efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0085] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0086] Figure 1 Schematic diagram of the structure of a wheeled vehicle ground contact parameter measurement device according to an embodiment of the present invention;

[0087] Figure 2 This is a schematic diagram of the assembly structure of a pressure sensor, a micro spring, and a raised micro travel switch of a wheeled vehicle ground contact parameter measurement device according to an embodiment of the present invention;

[0088] Figure 3 Schematic diagram of the overall structure of a wheeled vehicle ground contact parameter measurement device according to an embodiment of the present invention;

[0089] In the picture:

[0090] 1. Wheel detection structure; 10. Measuring platform; 11. Recessed area; 12. Pressure sensor; 13. Micro-motion spring; 14. Uphill slope; 15. Downhill slope; 16. Raised micro-motion travel switch; 2. Data analysis component; 3. Sliding guide rail. DETAILED DESCRIPTION

[0091] To make the purpose, technical solutions, and advantages of the embodiments of this application more clear, the technical solutions in the embodiments of this application will be clearly and completely described below in conjunction with the drawings in the embodiments of this application. Obviously, the described embodiments are part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0092] The embodiments of the present invention are further described in detail below with reference to the accompanying drawings.

[0093] The embodiments of the present application provide a wheeled vehicle ground contact parameter measurement device and method, which measures the wheel ground contact parameters based on a specific terrain structure in combination with multiple pressure sensors, effectively ensuring the reliability of the measurement results while improving measurement efficiency.

[0094] To achieve the above technical effects, the overall idea of ​​this application is as follows:

[0095] A wheeled vehicle ground contact parameter measuring device, the wheeled vehicle ground contact parameter measuring device comprising:

[0096] A pair of wheel detection structures 1 arranged side by side, each wheel detection structure 1 comprising a measuring platform 10 and two recessed areas 11 spaced apart on the measuring platform 10;

[0097] A plurality of pressure sensors 12 are provided in the recessed area 11;

[0098] The bottom surface of the pressure sensor 12 is connected to the top surface of the recessed area 11 through a micro spring 13. A raised micro travel switch 16 is provided around the center of the area of ​​the micro spring 13 on the bottom surface of the pressure sensor 12. The pressure sensor 12 is electrically connected to the corresponding raised micro travel switch 16.

[0099] The data analysis component 2 is connected to the pressure sensor 12 and the protrusion micro-stroke switch 16 via signals.

[0100] The embodiments of the present application are further described in detail below with reference to the accompanying drawings.

[0101] First, see Figures 1 to 3 As shown, an embodiment of the present application provides a wheeled vehicle ground contact parameter measurement device, the wheeled vehicle ground contact parameter measurement device comprising:

[0102] A pair of wheel detection structures 1 arranged side by side, each wheel detection structure 1 comprising a measuring platform 10 and two recessed areas 11 spaced apart on the measuring platform 10;

[0103] A plurality of pressure sensors 12 are provided in the recessed area 11;

[0104] The bottom surface of the pressure sensor 12 is connected to the top surface of the recessed area 11 through a micro spring 13. A raised micro travel switch 16 is provided around the center of the area of ​​the micro spring 13 on the bottom surface of the pressure sensor 12. The pressure sensor 12 is electrically connected to the corresponding raised micro travel switch 16.

[0105] The data analysis component 2 is connected to the pressure sensor 12 and the raised micro-stroke switch 16 for calculating the single wheel contact area and the single wheel contact pressure corresponding to each wheel of the vehicle to be tested.

[0106] It should be noted that when a vehicle drives onto the wheeled vehicle ground contact parameter measuring device, both the left and right wheels enter the corresponding recessed area 11;

[0107] The wheel presses the pressure sensor 12, the inching spring 13 contracts, and the space below the raised inching travel switch 16 is gradually squeezed. Finally, the lowermost end of the raised inching travel switch 16 is touched, and even comes into close contact with the surface of the recessed area 11, and is turned on and enters the on state. At this time, the data analysis component 2 can receive the on signal of the raised inching travel switch 16 and the monitoring data of the pressure sensor 12.

[0108] It can be found that the normal state of the raised micro-motion travel switch 16 is the disconnected state.

[0109] It should be noted that the raised micro-motion travel switches 16 are connected in series with the corresponding pressure sensors 12 , and the raised micro-motion travel switches 16 can be connected in parallel.

[0110] It can be seen that the four recessed areas 11 are actually the measurement areas of the four wheels.

[0111] In the embodiment of the present application, a plurality of pressure sensors are used in conjunction with a specific terrain structure to measure the wheel contact parameters. While improving the measurement efficiency, the repetitive workload is effectively reduced, and the reliability of the measurement results is effectively guaranteed.

[0112] Furthermore, a plurality of pressure sensors 12 arranged in rows and columns are provided in the recessed area 11 .

[0113] Specifically, an A*B lattice arrangement may be adopted.

[0114] It should be noted that each of the pressure sensors 12 can be configured with an independent power supply for independent power supply.

[0115] Furthermore, the pressure sensors 12 are distributed all over the surface of the recessed area 11;

[0116] More specifically, when the pressure sensors 12 are fully squeezed, they are in close contact with the surface of the recessed area 11 , that is, the number and arrangement of the pressure sensors 12 completely fit the contour and size of the surface of the recessed area 11 .

[0117] Furthermore, an upper slope 14 and a lower slope 15 are provided on a set of symmetrical sides of the measuring platform 10 .

[0118] Furthermore, a pair of the wheel detection structures 1 are slidably arranged side by side on the sliding guide rail 3 .

[0119] Furthermore, a pair of the wheel detection structures 1 are slidably arranged side by side on a plurality of sliding guide rails 3 arranged side by side;

[0120] The length direction of the wheel detection structure 1 is perpendicular to the length direction of the sliding guide rail 3 .

[0121] Furthermore, the sliding direction of the wheel detection structure 1 is the same as the length direction of the sliding guide rail 3 .

[0122] Specifically, the number of the sliding guide rails 3 can be three, and they can be arranged at equal intervals;

[0123] The pair of wheel detection structures 1 slide and can be adjusted at any time according to the different wheel spacings of the vehicles. After the spacing is determined, they are fixed by a locking pin structure.

[0124] Furthermore, the device is equipped with a single wheel contact area calculation formula, which is:

[0125] in,

[0126] A is the contact area of ​​a single wheel, a is the side length of the pressure sensor 12, and t is the number of the pressure sensors 12 in the recessed area 11 of the corresponding wheel that are in the connected state;

[0127] The top surface of the pressure sensor 12 is square.

[0128] It should be noted that the single wheel contact area calculation formula can also be converted to:

[0129] in,

[0130] A is the contact area of ​​a single wheel, S is the top surface area of ​​the pressure sensor 12 , and t is the number of the pressure sensors 12 in the recessed area 11 of the corresponding wheel that are in the connected state.

[0131] Furthermore, the device is equipped with a single wheel ground contact pressure calculation formula, which is:

[0132] in,

[0133] F is the ground pressure of a single wheel, f t is the pressure value of the pressure sensor 12, and t is the number of the pressure sensors 12 in the recessed area 11 of the corresponding wheel that are in the turned-on state.

[0134] Furthermore, the device is equipped with a single wheel ground contact pressure calculation formula, which is:

[0135] in,

[0136] M is the single wheel ground contact pressure, F is the single wheel ground contact pressure, and A is the single wheel ground contact area.

[0137] It should be noted that the single-wheel contact area calculation formula and the single-wheel contact pressure calculation formula can be provided to the data analysis component 2 to calculate the single-wheel contact area and single-wheel contact pressure corresponding to each wheel of the vehicle to be tested.

[0138] In a second aspect, an embodiment of the present application provides a method for measuring a ground contact parameter of a wheeled vehicle based on the ground contact parameter measuring device of the wheeled vehicle mentioned in the first aspect, the method comprising the following steps:

[0139] S1. Driving the wheels on both sides of the vehicle to be tested onto a pair of wheel detection structures 1, with all four wheels of the vehicle to be tested driving into the recessed area 11;

[0140] S2. Calculating the contact area of ​​each wheel of the vehicle under test based on the number of pressure sensors 12 in the connected state in each recessed area 11 and the top surface area of ​​the pressure sensor 12;

[0141] S3. Based on the number of the pressure sensors 12 in the connected state in each of the recessed areas 11 and the pressure values ​​of each of the pressure sensors 12 , calculate and obtain the single wheel ground contact pressure corresponding to each wheel of the vehicle to be tested.

[0142] In the embodiment of the present application, a plurality of pressure sensors are used in conjunction with a specific terrain structure to measure the wheel contact parameters. While improving the measurement efficiency, the repetitive workload is effectively reduced, and the reliability of the measurement results is effectively guaranteed.

[0143] It should be noted that the technical solution of the embodiment of the present application is based on a wheeled vehicle ground contact parameter measurement device, which includes:

[0144] A pair of wheel detection structures 1 arranged side by side, each wheel detection structure 1 comprising a measuring platform 10 and two recessed areas 11 spaced apart on the measuring platform 10;

[0145] A plurality of pressure sensors 12 are provided in the recessed area 11;

[0146] The bottom surface of the pressure sensor 12 is connected to the top surface of the recessed area 11 through a micro spring 13. A raised micro travel switch 16 is provided around the center of the area of ​​the micro spring 13 on the bottom surface of the pressure sensor 12. The pressure sensor 12 is electrically connected to the corresponding raised micro travel switch 16.

[0147] The data analysis component 2 is connected to the pressure sensor 12 and the raised micro-stroke switch 16 for calculating the single wheel contact area and the single wheel contact pressure corresponding to each wheel of the vehicle to be tested.

[0148] It should be noted that when a vehicle drives onto the wheeled vehicle ground contact parameter measuring device, both the left and right wheels enter the corresponding recessed area 11;

[0149] The wheel presses the pressure sensor 12, the inching spring 13 contracts, and the space below the raised inching travel switch 16 is gradually squeezed. Finally, the lowermost end of the raised inching travel switch 16 is touched, and even comes into close contact with the surface of the recessed area 11, and is turned on and enters the on state. At this time, the data analysis component 2 can receive the on signal of the raised inching travel switch 16 and the monitoring data of the pressure sensor 12.

[0150] It can be found that the normal state of the raised micro-motion travel switch 16 is the disconnected state.

[0151] It should be noted that the raised micro-motion travel switches 16 are connected in series with the corresponding pressure sensors 12 , and the raised micro-motion travel switches 16 can be connected in parallel.

[0152] It can be seen that the four recessed areas 11 are actually the measurement areas of the four wheels.

[0153] Furthermore, a plurality of pressure sensors 12 arranged in rows and columns are provided in the recessed area 11 .

[0154] Specifically, an A*B lattice arrangement may be adopted.

[0155] It should be noted that each of the pressure sensors 12 can be configured with an independent power supply for independent power supply.

[0156] Furthermore, the pressure sensors 12 are distributed all over the surface of the recessed area 11;

[0157] More specifically, when the pressure sensors 12 are fully squeezed, they are in close contact with the surface of the recessed area 11 , that is, the number and arrangement of the pressure sensors 12 completely fit the contour and size of the surface of the recessed area 11 .

[0158] Furthermore, an upper slope 14 and a lower slope 15 are provided on a set of symmetrical sides of the measuring platform 10 .

[0159] Furthermore, a pair of the wheel detection structures 1 are slidably arranged side by side on the sliding guide rail 3 .

[0160] Furthermore, a pair of the wheel detection structures 1 are slidably arranged side by side on a plurality of sliding guide rails 3 arranged side by side;

[0161] The length direction of the wheel detection structure 1 is perpendicular to the length direction of the sliding guide rail 3 .

[0162] Furthermore, the sliding direction of the wheel detection structure 1 is the same as the length direction of the sliding guide rail 3 .

[0163] Specifically, the number of the sliding guide rails 3 can be three, and they can be arranged at equal intervals;

[0164] The pair of wheel detection structures 1 slide and can be adjusted at any time according to the different wheel spacings of the vehicles. After the spacing is determined, they are fixed by a locking pin structure.

[0165] When the sliding guide rail 3 is provided, the measuring method further includes step S0 before step S1:

[0166] Based on the wheelbase of the vehicle to be tested, the spacing between the pair of wheel detection structures 1 is adjusted so that the spacing between the pair of wheel detection structures 1 is the same as the wheelbase of the vehicle to be tested.

[0167] Furthermore, the method is configured with a single wheel contact area calculation formula, which is:

[0168] in,

[0169] A is the contact area of ​​a single wheel, a is the side length of the pressure sensor 12, and t is the number of the pressure sensors 12 in the recessed area 11 of the corresponding wheel that are in the connected state;

[0170] The top surface of the pressure sensor 12 is square.

[0171] It should be noted that the single wheel contact area calculation formula can also be converted to:

[0172] in,

[0173] A is the contact area of ​​a single wheel, S is the top surface area of ​​the pressure sensor 12 , and t is the number of the pressure sensors 12 in the recessed area 11 of the corresponding wheel that are in the connected state.

[0174] Furthermore, the method is configured with a single wheel ground contact pressure calculation formula, which is:

[0175] in,

[0176] F is the ground pressure of a single wheel, f t is the pressure value of the pressure sensor 12, and t is the number of the pressure sensors 12 in the recessed area 11 of the corresponding wheel that are in the turned-on state.

[0177] Furthermore, the method is configured with a single wheel ground contact pressure calculation formula, and the single wheel ground contact pressure calculation formula is:

[0178] in,

[0179] M is the single wheel ground contact pressure, F is the single wheel ground contact pressure, and A is the single wheel ground contact area.

[0180] It should be noted that the wheeled vehicle ground parameter measurement method mentioned in the second aspect is similar to the technical principle of the wheeled vehicle ground parameter measurement device mentioned in the first aspect in terms of technical issues, technical means and technical effects, and will not be elaborated here.

[0181] In the description of this application, it should be noted that the terms "upper" and "lower" and the like indicate orientations or positional relationships based on the orientations or positional relationships 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, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on this application. Unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be internal communication between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to the specific circumstances.

[0182] It should be noted that, in this application, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any 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 comprising 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, an element defined by the sentence "comprising a ..." does not exclude the presence of other identical elements in the process, method, article or device comprising the element.

[0183] The foregoing is merely a list of specific embodiments of the present application, intended to enable those skilled in the art to understand or implement the present 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 the present application. Therefore, the present application is not limited to the embodiments shown herein, but is intended to conform to the broadest scope consistent with the principles and novel features of the present application.

Claims

1. A wheeled vehicle ground contact parameter measuring device, characterized in that: The device comprises: A pair of wheel detection structures (1) arranged side by side, the wheel detection structure (1) comprising a measuring platform (10) and two recessed areas (11) arranged at intervals on the measuring platform (10); A plurality of pressure sensors (12) are arranged in the recessed area (11); The bottom surface of the pressure sensor (12) is connected to the top surface of the recessed area (11) via a micro spring (13); a raised micro travel switch (16) is provided around the center of the area of ​​the micro spring (13) on the bottom surface of the pressure sensor (12); and the pressure sensor (12) is electrically connected to the corresponding raised micro travel switch (16); A data analysis component (2) connected to the pressure sensor (12) and the raised micro-travel switch (16) is used to calculate and obtain the single-wheel contact area and single-wheel contact pressure corresponding to each wheel of the vehicle to be tested.

2. The wheeled vehicle ground contact parameter measuring device according to claim 1, wherein: A plurality of pressure sensors (12) arranged in rows and columns are provided in the recessed area (11).

3. The wheeled vehicle ground contact parameter measuring device according to claim 1, wherein: The pressure sensors (12) are distributed all over the surface of the recessed area (11).

4. The wheeled vehicle ground contact parameter measuring device according to claim 1, wherein: A set of symmetrical sides of the measuring platform (10) are provided with an upper slope (14) and a lower slope (15).

5. The wheeled vehicle ground contact parameter measuring device according to claim 1, wherein: A pair of wheel detection structures (1) are slidably arranged side by side on a sliding guide rail (3).

6. The wheeled vehicle ground contact parameter measuring device according to claim 5, characterized in that: A pair of wheel detection structures (1) are slidably arranged side by side on a plurality of sliding guide rails (3) arranged side by side; The length direction of the wheel detection structure (1) is perpendicular to the length direction of the sliding guide rail (3).

7. The wheeled vehicle ground contact parameter measuring device according to claim 5 or 6, characterized in that: The sliding direction of the wheel detection structure (1) is the same as the length direction of the sliding guide rail (3).

8. The wheeled vehicle ground contact parameter measuring device according to claim 1, wherein: The device is equipped with a single wheel contact area calculation formula, which is: ;in, A is the contact area of ​​a single wheel, a is the side length of the pressure sensor (12), and t is the number of the pressure sensors (12) in the connected state within the recessed area (11) of the corresponding wheel; The top surface of the pressure sensor (12) is square.

9. The wheeled vehicle ground contact parameter measuring device according to claim 1, wherein: The device is equipped with a single wheel ground contact pressure calculation formula, which is: ;in, F is the ground pressure of a single wheel, is the pressure value of the pressure sensor (12), and t is the number of the pressure sensors (12) in the connected state in the recessed area (11) of the corresponding wheel.

10. A method for measuring the ground contact parameters of a wheeled vehicle according to any one of claims 1 to 9, characterized in that: The measuring method comprises the following steps: Driving the wheels on both sides of the vehicle to be tested onto a pair of wheel detection structures (1), and driving all four wheels of the vehicle to be tested into the recessed area (11); Based on the number of pressure sensors (12) in the connected state in each recessed area (11), combined with the top surface area of ​​the pressure sensor (12), a single wheel contact area corresponding to each wheel of the vehicle to be tested is calculated; Based on the number of the pressure sensors (12) in the connected state in each of the recessed areas (11), combined with the pressure values ​​of each of the pressure sensors (12), the single wheel ground contact pressure corresponding to each wheel of the vehicle to be tested is calculated.

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