Method, device, measuring instrument and storage medium for measuring minimum turning diameter of vehicle

Abstract

The present invention discloses a method, device, measuring instrument and storage medium for measuring the minimum turning diameter of a vehicle, wherein the measuring method comprises the following steps: obtaining the movement stroke of each wheel when the vehicle turns, and obtaining the rear wheel track of the vehicle; determining the left front wheel turning radius and the right front wheel turning radius of the vehicle according to the movement stroke of each wheel and the rear wheel track; determining the minimum turning diameter of the vehicle according to the left front wheel turning radius and the right front wheel turning radius. Thus, the minimum turning diameter of the vehicle is automatically calculated and measured through the movement stroke of each wheel when the vehicle turns and the rear wheel track of the vehicle. At the same time, the test can be completed by only one measurement personnel, effectively saving the measurement labor cost and improving the measurement efficiency.

Description

Technical Field

[0001] The present invention relates to the technical field of vehicle minimum turning diameter measurement, and in particular to a vehicle minimum turning diameter measurement method, a computer-readable storage medium, a measuring instrument and a vehicle minimum turning diameter measurement device. Background Art

[0002] At present, the minimum turning diameter of automobiles is an important indicator of automobile quality inspection. The measurement method provided by the existing industry standards or national standards is: the car is driving at a low speed on a flat and hard road, and the steering wheel is turned to the extreme position. Then the measurement personnel outside the car use a tape measure to measure the diameter of the track circle left by the car on the ground, and then take the arithmetic average.

[0003] However, the related art method for testing the minimum turning diameter of a car usually adopts the track measurement method, which has great limitations. First, at least two testers are required to cooperate, one to drive the vehicle and the other to draw the wheel track. The left turning diameter and the right turning diameter need to be tested repeatedly. After the track drawing is completed, two people are required to cooperate in testing the minimum turning diameter. The measurement efficiency is very low and the labor cost of measurement is high. Summary of the invention

[0004] The present invention aims to solve one of the technical problems in the related art to at least a certain extent. To this end, the first purpose of the present invention is to provide a method for measuring the minimum turning diameter of a vehicle, which can automatically calculate and measure the minimum turning diameter of the vehicle through the movement stroke of each wheel when the vehicle turns and the rear wheel track of the vehicle. At the same time, the test can be completed by only one measurement personnel, effectively saving the measurement labor cost and improving the measurement efficiency.

[0005] A second object of the present invention is to provide a computer-readable storage medium.

[0006] The third object of the present invention is to provide a measuring instrument.

[0007] A fourth object of the present invention is to provide a device for measuring the minimum turning diameter of a vehicle.

[0008] To achieve the above-mentioned purpose, a method for measuring the minimum turning diameter of a vehicle proposed in an embodiment of the first aspect of the present invention includes the following steps: obtaining the movement stroke of each wheel when the vehicle turns, and obtaining the rear wheel track of the vehicle; determining the left front wheel turning radius and the right front wheel turning radius of the vehicle based on the movement stroke of each wheel and the rear wheel track; determining the minimum turning diameter of the vehicle based on the left front wheel turning radius and the right front wheel turning radius.

[0009] According to the method for measuring the minimum turning diameter of a vehicle in an embodiment of the present invention, the movement stroke of each wheel when the vehicle turns is obtained, and the rear wheel track of the vehicle is obtained, and then the left front wheel turning radius and the right front wheel turning radius of the vehicle are determined according to the movement stroke of each wheel and the rear wheel track, and the minimum turning diameter of the vehicle is determined according to the left front wheel turning radius and the right front wheel turning radius. Thus, the minimum turning diameter of the vehicle is automatically calculated and measured through the movement stroke of each wheel when the vehicle turns and the rear wheel track of the vehicle. At the same time, the test can be completed by only one measurement personnel, which effectively saves the measurement labor cost and improves the measurement efficiency.

[0010] In addition, the method for measuring the minimum turning diameter of a vehicle according to the above embodiment of the present invention may also have the following additional technical features:

[0011] According to one embodiment of the present invention, obtaining the movement stroke of each wheel when the vehicle turns includes: when the vehicle turns, detecting the rotation parameters of the corresponding wheels through sensors provided corresponding to each wheel; and determining the movement stroke of each wheel according to the rotation parameters of each wheel.

[0012] According to one embodiment of the present invention, the rotation parameter includes a count value of a sensor corresponding to each wheel, wherein the left front wheel turning radius and the right front wheel turning radius of the vehicle are determined based on the movement stroke of each wheel and the rear wheel track, including: determining the left front wheel turning radius based on the count value of the sensor corresponding to the left rear wheel, the count value of the sensor corresponding to the right rear wheel, the count value of the sensor corresponding to the left front wheel, and the rear wheel track; determining the right front wheel turning radius based on the count value of the sensor corresponding to the left rear wheel, the count value of the sensor corresponding to the right rear wheel, the count value of the sensor corresponding to the right front wheel, and the rear wheel track.

[0013] According to one embodiment of the present invention, after determining the left front wheel turning radius and the right front wheel turning radius of the vehicle according to the movement range of each wheel and the rear wheel track, the method further includes: determining the channel circle diameter of the vehicle according to the left front wheel turning radius and the right front wheel turning radius.

[0014] According to one embodiment of the present invention, before determining the minimum turning diameter of the vehicle based on the left front wheel turning radius and the right front wheel turning radius, the method also includes: determining the axle load difference between the front and rear axles of the vehicle; determining a correction coefficient based on the axle load difference; and respectively correcting the left front wheel turning radius and the right front wheel turning radius based on the correction coefficient.

[0015] To achieve the above-mentioned purpose, a computer-readable storage medium is proposed in an embodiment of the second aspect of the present invention, on which a measurement program for the minimum turning diameter of a vehicle is stored. When the measurement program for the minimum turning diameter of the vehicle is executed by a processor, the measurement method for the minimum turning diameter of the vehicle as described in the embodiment of the first aspect is implemented.

[0016] According to the computer-readable storage medium of the embodiment of the present invention, the minimum turning diameter of the vehicle can be automatically calculated and measured through the movement stroke of each wheel when the vehicle turns and the rear wheel track of the vehicle. At the same time, the test can be completed by only one measurement personnel, which effectively saves measurement labor costs and improves measurement efficiency.

[0017] To achieve the above-mentioned purpose, the measuring instrument proposed in the third aspect embodiment of the present invention includes a memory, a processor and a vehicle minimum turning diameter measurement program stored in the memory and executable on the processor. When the processor executes the vehicle minimum turning diameter measurement program, the vehicle minimum turning diameter measurement method as described in the first aspect embodiment is implemented.

[0018] The measuring instrument according to the embodiment of the present invention can automatically calculate and measure the minimum turning diameter of the vehicle through the movement stroke of each wheel and the rear wheel track of the vehicle when the vehicle turns. At the same time, the test can be completed by only one measurement personnel, which effectively saves measurement labor costs and improves measurement efficiency.

[0019] To achieve the above-mentioned purpose, the device for measuring the minimum turning diameter of a vehicle proposed in the fourth aspect of the embodiment of the present invention includes: a detection module, used to detect the movement stroke of each wheel when the vehicle turns; a measuring instrument, used to obtain the rear wheel track of the vehicle, and determine the left front wheel turning radius and the right front wheel turning radius of the vehicle according to the movement stroke of each wheel and the rear wheel track, and determine the minimum turning diameter of the vehicle according to the left front wheel turning radius and the right front wheel turning radius.

[0020] According to the device for measuring the minimum turning diameter of a vehicle of an embodiment of the present invention, the movement stroke of each wheel when the vehicle turns is detected by a detection module, and the rear wheel track of the vehicle is obtained by a measuring instrument, and the left front wheel turning radius and the right front wheel turning radius of the vehicle are determined according to the movement stroke of each wheel and the rear wheel track, and the minimum turning diameter of the vehicle is determined according to the left front wheel turning radius and the right front wheel turning radius. Thus, the minimum turning diameter of the vehicle is automatically calculated and measured through the movement stroke of each wheel when the vehicle turns and the rear wheel track of the vehicle. At the same time, the test can be completed by only one measurement personnel, which effectively saves the measurement labor cost and improves the measurement efficiency.

[0021] In addition, the device for measuring the minimum turning diameter of a vehicle according to an embodiment of the present invention may also have the following additional technical features:

[0022] According to one embodiment of the present invention, the detection module includes: a sensor arranged corresponding to each wheel, used to detect the rotation parameters of the corresponding wheel when the vehicle turns; and a data acquisition unit, used to collect the rotation parameters of each wheel to determine the movement range of each wheel.

[0023] According to one embodiment of the present invention, the rotation parameters include count values ​​of sensors arranged corresponding to each wheel, and the measuring instrument is further used to determine the turning radius of the left front wheel based on the count values ​​of the sensors corresponding to the left rear wheel, the count values ​​of the sensors corresponding to the right rear wheel, the count values ​​of the sensors corresponding to the left front wheel, and the rear wheel track; and determine the turning radius of the right front wheel based on the count values ​​of the sensors corresponding to the left rear wheel, the count values ​​of the sensors corresponding to the right rear wheel, the count values ​​of the sensors corresponding to the right front wheel, and the rear wheel track.

[0024] According to one embodiment of the present invention, the measuring instrument is further used to determine the channel circle diameter of the vehicle based on the left front wheel turning radius and the right front wheel turning radius.

[0025] According to one embodiment of the present invention, the measuring instrument is also used to determine the axle load difference between the front and rear axles of the vehicle before determining the minimum turning diameter of the vehicle based on the left front wheel turning radius and the right front wheel turning radius, and determine a correction coefficient based on the axle load difference, and respectively correct the left front wheel turning radius and the right front wheel turning radius based on the correction coefficient.

[0026] Additional aspects and advantages of the present invention will be given in part in the following description and in part will be obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 is a schematic flow chart of a method for measuring a minimum turning diameter of a vehicle according to an embodiment of the present invention;

[0028] Figure 2 is a schematic flow chart of a method for measuring a minimum turning diameter of a vehicle according to an embodiment of the present invention;

[0029] Figure 3 is a schematic diagram of the operation of a magnetoelectric counting sensor according to a specific embodiment of the present invention;

[0030] Figure 4 is a schematic diagram of the principle of a method for measuring the minimum turning diameter of a vehicle according to a specific embodiment of the present invention;

[0031] Figure 5 is a schematic flow chart of a method for measuring a minimum turning diameter of a vehicle according to an embodiment of the present invention;

[0032] Figure 6 is a schematic flow chart of a method for measuring a minimum turning diameter of a vehicle according to an embodiment of the present invention;

[0033] Figure 7 is a block diagram of a device for measuring a minimum turning diameter of a vehicle according to an embodiment of the present invention;

[0034] Figure 8 It is a schematic structural diagram of a device for measuring the minimum turning diameter of a vehicle according to a specific embodiment of the present invention. DETAILED DESCRIPTION

[0035] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and should not be construed as limiting the present invention.

[0036] The following describes a method for measuring a minimum turning diameter of a vehicle, a computer-readable storage medium, a measuring instrument, and a device for measuring a minimum turning diameter of a vehicle according to embodiments of the present invention with reference to the accompanying drawings.

[0037] Figure 1 4 is a flow chart of a method for measuring a minimum turning diameter of a vehicle according to an embodiment of the present invention.

[0038] like Figure 1 As shown, the method for measuring the minimum turning diameter of a vehicle includes the following steps:

[0039] S101, obtaining the movement travel of each wheel when the vehicle turns, and obtaining the rear wheel track of the vehicle.

[0040] Optionally, the movement stroke of each wheel may be the distance that each wheel rotates when the vehicle turns, and the rear wheel track of the vehicle may be set accordingly according to the type of vehicle.

[0041] S102, determining a left front wheel turning radius and a right front wheel turning radius of the vehicle according to the movement stroke of each wheel and the rear wheel track.

[0042] It can be understood that in the embodiments of the present invention, the left front wheel turning radius and the right front wheel turning radius of the vehicle can be determined by the movement stroke of each wheel and the rear wheel track, that is, only one surveyor is needed to complete the measurement of the left front wheel turning radius and the right front wheel turning radius. Compared with the traditional wheel rolling trajectory measurement method, at least 2 people are arranged to complete the test of the outer wheel turning diameter. For example, 1 person drives the car, and 1 person performs development actions such as sprinkling water or applying chalk outside the car. After the development is completed, 2 people are needed to pull the teeth and perform at least 3 turning diameter measurements, which can effectively save the measurement labor cost and improve the measurement efficiency.

[0043] S103, determining a minimum turning diameter of the vehicle according to a left front wheel turning radius and a right front wheel turning radius.

[0044] It can be understood that if the difference between the left front wheel turning radius and the right front wheel turning radius exceeds 0.1m, it can be determined that the minimum turning radius of the vehicle is the larger value of the left front wheel turning radius and the right front wheel turning radius; if the difference between the left front wheel turning radius and the right front wheel turning radius is within 0.1m, it can be determined that the minimum turning radius of the vehicle is the average of the left front wheel turning radius and the right front wheel turning radius.

[0045] Specifically, Figure 2 As shown, the movement stroke of each wheel when the vehicle turns is obtained, including:

[0046] S201, when the vehicle turns, the rotation parameters of the corresponding wheels are detected by the sensors provided corresponding to each wheel.

[0047] It should be understood that, when the vehicle turns, each wheel will generate corresponding rotation, and therefore, the rotation parameters of the corresponding wheel can be detected by the sensor provided corresponding to each wheel.

[0048] S202, determining the movement stroke of each wheel according to the rotation parameter of each wheel.

[0049] It is understandable that the movement stroke of the wheels when the vehicle turns can be determined based on the rotation parameters of each wheel when the vehicle turns.

[0050] Specifically, in one embodiment of the present invention, the rotation parameter includes a count value of a sensor provided corresponding to each wheel.

[0051] Specifically, the sensor corresponding to each wheel is a magnetoelectric counting sensor, and a gear plate is installed on each wheel hub of the vehicle. The gear plate is adsorbed on the wheel hub by a magnet. The magnetoelectric counting sensor is installed within 5 mm from the top of the gear plate through a bracket, and is connected to the data acquisition instrument inside the vehicle through a wiring harness.

[0052] Among them, the gear plate has n teeth in the circumferential direction, see Figure 3 The magnetoelectric counting sensor is a sensor that senses magnetic field strength and converts it into an electrical signal. Each time the gear plate tooth top passes through the magnetoelectric counting sensor, the sensor outputs a high level, and each time the gear plate tooth root passes through the magnetoelectric counting sensor, the sensor outputs a low level.

[0053] It should be understood that during the minimum turning diameter measurement process, the sensor set corresponding to each wheel is responsible for collecting the rotation parameters of the corresponding wheel, and determining the movement stroke of each wheel based on the rotation parameters of each wheel, thereby providing data support for the subsequent calculation of the vehicle turning diameter, and the gear plate on each wheel hub is required to be exactly the same.

[0054] Optionally, in some embodiments of the present invention, a magnetoelectric counting sensor is used to detect the rotation parameters of the corresponding wheels, which is not affected by the weather environment, and the minimum turning diameter of the vehicle can be measured around the clock. In addition, the measurement accuracy can be further improved by increasing the number of gear plate teeth.

[0055] The following is combined with Figure 4 A specific embodiment of the present invention will be described below with respect to a method for measuring the minimum turning diameter of a vehicle according to an embodiment of the present invention.

[0056] For example, Figure 4 As shown, it is known that the rear wheel track of the vehicle is b, the front and rear wheelbase of the vehicle is L, and the minimum turning diameter measurement process of the vehicle is that the sensor set corresponding to each wheel is energized, and after the vehicle is started, the vehicle is turned to the extreme position on one side (for example, the left side), and the minimum turning diameter measurement is started. It is assumed that the vehicle rotates N (generally N≥3) circles around the rotation center point O. At this time, the count value of the sensor set corresponding to the left rear wheel is n1, the count value of the sensor set corresponding to the right rear wheel is n2, the count value of the sensor set corresponding to the left front wheel is n3, and the count value of the sensor set corresponding to the inner right wheel is n4.

[0057] Optionally, in some embodiments of the present invention, during testing, the number of revolutions N of the vehicle may be increased to further improve the measurement accuracy.

[0058] Furthermore, if Figure 5 As shown, the left front wheel turning radius and the right front wheel turning radius of the vehicle are determined according to the movement stroke of each wheel and the rear wheel track, including:

[0059] S1021, determining the turning radius of the left front wheel according to the count value of the sensor corresponding to the left rear wheel, the count value of the sensor corresponding to the right rear wheel, the count value of the sensor corresponding to the left front wheel, and the rear wheel track.

[0060] Assuming that the wheel movement distance corresponding to a count value signal of the sensor is △d, the movement radius of the left rear wheel is R1, the movement radius of the right rear wheel is R2, the movement radius of the left front wheel is R3, and the movement radius of the right front wheel is R4, then the following formula is established based on the movement relationship:

[0061] 2*π*R1*N=n1*△d; ---------Formula①

[0062] 2*π*R2*N=n2*△d; ---------Formula ②

[0063] R1-R2=b; ---------Formula ③

[0064] 2*π*R3*N=n3*△d; ---------Formula ④

[0065] 2*π*R4*N=n4*△d; ---------Formula⑤

[0066] Combining formulas ①, ②, and ③, we know that:

[0067]

[0068] Combining formulas ④ and ⑥, we can know that:

[0069]

[0070] Therefore, by substituting the count value n1 of the sensor corresponding to the left rear wheel, the count value n2 of the sensor corresponding to the right rear wheel, the count value n3 of the sensor corresponding to the left front wheel and the rear wheel track b into formula ⑦, the turning radius R3 of the left front wheel can be obtained.

[0071] S1022, determining the turning radius of the right front wheel according to the count value of the sensor corresponding to the left rear wheel, the count value of the sensor corresponding to the right rear wheel, the count value of the sensor corresponding to the right front wheel and the rear wheel track.

[0072] Similarly, by combining formulas ⑤ and ⑥, we can know that:

[0073]

[0074] Therefore, by substituting the count value n1 of the sensor corresponding to the left rear wheel, the count value n2 of the sensor corresponding to the right rear wheel, the count value n4 of the sensor corresponding to the right front wheel and the rear wheel track b into formula ⑧, the turning radius R4 of the left front wheel can be obtained.

[0075] It should be noted that it is also possible to combine formulas ⑤ and ⑥, and combine formulas ⑤ and ⑥ to obtain the following formula:

[0076]

[0077]

[0078] That is to say, in the embodiment of the present invention, according to the movement stroke of each wheel and the rear wheel track, and in combination with the above formulas ⑦, ⑧, ⑨ and ⑩, during the measurement process, the turning diameter measurement of the four wheels can be completed simultaneously, thereby further improving the measurement efficiency.

[0079] Furthermore, after determining the left front wheel turning radius and the right front wheel turning radius of the vehicle according to the movement range of each wheel and the rear wheel track, the method also includes: determining the channel circle diameter of the vehicle according to the left front wheel turning radius and the right front wheel turning radius.

[0080] It can be understood that the channel circle diameter R of the vehicle can be determined based on the left front wheel turning radius R3 and the right front wheel turning radius R4, where R=(R3+R4) / 2.

[0081] Furthermore, if Figure 6 As shown, before determining the minimum turning diameter of the vehicle according to the left front wheel turning radius and the right front wheel turning radius, the method also includes:

[0082] S301, determining the axle load difference between the front and rear axles of the vehicle.

[0083] It is understandable that the axle load difference between the front and rear axles of the vehicle can be determined based on the front axle load and the rear axle load of the vehicle. For example, the axle load difference between the front and rear axles of the vehicle can be the difference between the front axle load and the rear axle load of the vehicle.

[0084] S302, determining a correction coefficient according to the axle load difference.

[0085] It should be noted that in order to correct the turning diameter measurement error caused by the tire rolling radius due to the load difference of different tires on the wheels, the influence of the difference in axle load distribution of the front and rear axles of the vehicle on the static load radius of the tire with standard tire pressure is taken into consideration. Therefore, in one embodiment of the present invention, the correction coefficient K is further determined according to the axle load difference.

[0086] It should be understood that, by performing vertical stiffness analysis on the 195 / 65R15 tire, when the tire load is between 50% and 100% of the maximum allowable load, the vertical stiffness of the tire will slightly increase as the load increases. At the same time, by performing linear fitting on the data, it is determined that when the wheel load of the tire of this specification increases by 20kg, the static load radius of the tire decreases by 1mm, that is, for every 10kg increase in wheel load, the static load radius of the tire decreases by 0.15%. Therefore, in the embodiment of the present invention, the correction coefficient K can be obtained by the following formula:

[0087]

[0088] S303: Correct the left front wheel turning radius and the right front wheel turning radius respectively according to the correction coefficient.

[0089] Specifically, the left front wheel turning radius R3 can be corrected according to the correction coefficient K to R3 = n3*b*(n1-n2)*(1-K), and the right front wheel turning radius R4 can be corrected according to the correction coefficient to R4 = n4*b*(n1-n2)*(1-K).

[0090] It should be noted that when correcting the turning radius of the left front wheel and the right front wheel according to the correction coefficient, it is necessary to distinguish the positive and negative difference in axle load between the front and rear axles of the vehicle. Assuming that the front axle load of the vehicle is heavier than the rear axle load, the K value is positive. If the front axle load of the vehicle is lighter than the rear axle load, the K value is negative.

[0091] It should be understood that in the embodiment of the present invention, since the movement stroke generated by each wheel during the rotation process is a known quantity that can be accurately measured using a sensor, and the rear wheel track b is a known parameter of the actual vehicle, the minimum turning diameter and channel circle diameter of different tires can be accurately calculated based on the movement stroke of each wheel and the rear wheel track.

[0092] In addition, compared with the prior art, it is necessary to select the midpoint of the tire track for measurement when performing measurement. However, there is a certain error in finding the maximum value on the track, which causes an error of about 0.1m in the measurement result of the measurement method. In the embodiment of the present invention, the minimum turning diameter of each tire is determined according to the movement stroke of each wheel and the rear wheel track, which can avoid the influence of the tape measure measurement accuracy, and there is no need to consider the Ackerman effect of the front wheel, and the measurement is more intelligent and accurate.

[0093] In summary, according to the method for measuring the minimum turning diameter of a vehicle in an embodiment of the present invention, the movement stroke of each wheel when the vehicle turns is obtained, and the rear wheel track of the vehicle is obtained, and then the left front wheel turning radius and the right front wheel turning radius of the vehicle are determined according to the movement stroke of each wheel and the rear wheel track, and the minimum turning diameter of the vehicle is determined according to the left front wheel turning radius and the right front wheel turning radius. Thus, the minimum turning diameter of the vehicle is automatically calculated and measured through the movement stroke of each wheel when the vehicle turns and the rear wheel track of the vehicle. At the same time, the test can be completed by only one measurement personnel, which effectively saves the measurement labor cost and improves the measurement efficiency.

[0094] Based on the method for measuring the minimum turning diameter of a vehicle in the aforementioned embodiment of the present invention, the embodiment of the present invention proposes a computer-readable storage medium, on which a measurement program for the minimum turning diameter of a vehicle is stored. When the measurement program for the minimum turning diameter of a vehicle is executed by a processor, the method for measuring the minimum turning diameter of a vehicle in the aforementioned embodiment of the present invention is implemented.

[0095] It should be noted that the specific implementation of the computer-readable storage medium according to the embodiment of the present invention corresponds one to one with the specific implementation of the method for measuring the minimum turning diameter of a vehicle according to the aforementioned embodiment of the present invention, and will not be described in detail herein.

[0096] In summary, the computer-readable storage medium according to the embodiment of the present invention can automatically calculate and measure the minimum turning diameter of the vehicle through the movement stroke of each wheel and the rear wheel track of the vehicle when the vehicle turns. At the same time, the test can be completed by only one measurement personnel, which effectively saves measurement labor costs and improves measurement efficiency.

[0097] Based on the method for measuring the minimum turning diameter of a vehicle in the aforementioned embodiment of the present invention, the embodiment of the present invention proposes a measuring instrument, including a memory, a processor, and a measurement program for the minimum turning diameter of a vehicle stored in the memory and executable on the processor. When the processor executes the measurement program for the minimum turning diameter of the vehicle, the method for measuring the minimum turning diameter of the vehicle in the aforementioned embodiment of the present invention is implemented.

[0098] It should be noted that the specific implementation of the measuring instrument according to the embodiment of the present invention corresponds to the specific implementation of the method for measuring the minimum turning diameter of a vehicle according to the aforementioned embodiment of the present invention, and will not be described in detail herein.

[0099] In summary, the measuring instrument according to the embodiment of the present invention can automatically calculate and measure the minimum turning diameter of the vehicle through the movement stroke of each wheel and the rear wheel track of the vehicle when the vehicle turns. At the same time, the test can be completed by only one measurement personnel, which effectively saves measurement labor costs and improves measurement efficiency.

[0100] Figure 7 A block diagram of a device for measuring a minimum turning diameter of a vehicle according to an embodiment of the present invention.

[0101] like Figure 7 As shown, the device 100 for measuring the minimum turning diameter of a vehicle includes: a detection module 10 and a measuring instrument 20 .

[0102] Specifically, the detection module 10 is used to detect the movement stroke of each wheel when the vehicle turns; the measuring instrument 20 is used to obtain the rear wheel track of the vehicle, and determine the left front wheel turning radius and the right front wheel turning radius of the vehicle according to the movement stroke of each wheel and the rear wheel track, and determine the minimum turning diameter of the vehicle according to the left front wheel turning radius and the right front wheel turning radius.

[0103] Furthermore, the detection module 10 includes: a sensor arranged corresponding to each wheel, for detecting the rotation parameter of the corresponding wheel when the vehicle turns; and a data acquisition unit, for collecting the rotation parameter of each wheel to determine the movement stroke of each wheel.

[0104] Specifically, refer to Figure 8The data acquisition unit acquires the level signal of the sensor corresponding to each wheel, and obtains the count value of the sensor corresponding to each wheel according to the high and low level outputs acquired through the speed encoder, and transmits the count value to the PC end, so that the PC end can calculate the minimum turning radius of each wheel according to the count value of the sensor corresponding to each wheel.

[0105] Furthermore, the rotation parameters include count values ​​of sensors arranged corresponding to each wheel, and the measuring instrument 20 is also used to determine the turning radius of the left front wheel according to the count values ​​of the sensors corresponding to the left rear wheel, the count values ​​of the sensors corresponding to the right rear wheel, the count values ​​of the sensors corresponding to the left front wheel, and the rear wheel track, and to determine the turning radius of the right front wheel according to the count values ​​of the sensors corresponding to the left rear wheel, the count values ​​of the sensors corresponding to the right rear wheel, the count values ​​of the sensors corresponding to the right front wheel, and the rear wheel track.

[0106] Furthermore, the measuring instrument 20 is also used to determine the channel circle diameter of the vehicle according to the turning radius of the left front wheel and the turning radius of the right front wheel.

[0107] Furthermore, the measuring instrument 20 is also used to determine the axle load difference between the front and rear axles of the vehicle before determining the minimum turning diameter of the vehicle based on the left front wheel turning radius and the right front wheel turning radius, and to determine a correction coefficient based on the axle load difference, and to correct the left front wheel turning radius and the right front wheel turning radius respectively according to the correction coefficient.

[0108] It should be noted that the specific implementation of the device for measuring the minimum turning diameter of a vehicle in the embodiment of the present invention corresponds one to one with the specific implementation of the method for measuring the minimum turning diameter of a vehicle in the aforementioned embodiment of the present invention, and will not be described in detail herein.

[0109] In summary, according to the device for measuring the minimum turning diameter of a vehicle in an embodiment of the present invention, the movement stroke of each wheel when the vehicle turns is detected by the detection module, and the rear wheel track of the vehicle is obtained by the measuring instrument, and the left front wheel turning radius and the right front wheel turning radius of the vehicle are determined according to the movement stroke of each wheel and the rear wheel track, and the minimum turning diameter of the vehicle is determined according to the left front wheel turning radius and the right front wheel turning radius. Thus, the minimum turning diameter of the vehicle is automatically calculated and measured through the movement stroke of each wheel when the vehicle turns and the rear wheel track of the vehicle. At the same time, the test can be completed by only one measurement personnel, which effectively saves the measurement labor cost and improves the measurement efficiency.

[0110] It should be noted that the logic and / or steps represented in the flowchart or otherwise described herein, for example, can be considered as a sequenced list of executable instructions for implementing logical functions, and can be specifically implemented in any computer-readable medium for use by an instruction execution system, device or apparatus (such as a computer-based system, a system including a processor, or other system that can fetch instructions from an instruction execution system, device or apparatus and execute instructions), or in combination with these instruction execution systems, devices or apparatuses. For the purposes of this specification, "computer-readable medium" can be any device that can contain, store, communicate, propagate or transmit a program for use by an instruction execution system, device or apparatus, or in combination with these instruction execution systems, devices or apparatuses. More specific examples of computer-readable media (a non-exhaustive list) include the following: an electrical connection portion with one or more wirings (electronic device), a portable computer disk box (magnetic device), a random access memory (RAM), a read-only memory (ROM), an erasable and programmable read-only memory (EPROM or flash memory), an optical fiber device, and a portable compact disk read-only memory (CDROM). In addition, the computer-readable medium may even be paper or other suitable medium on which the program is printed, since the program may be obtained electronically, for example, by optically scanning the paper or other medium and then editing, interpreting or processing in other suitable ways if necessary, and then stored in a computer memory.

[0111] It should be understood that the various parts of the present invention can be implemented by hardware, software, firmware or a combination thereof. In the above-mentioned embodiments, a plurality of steps or methods can be implemented by software or firmware stored in a memory and executed by a suitable instruction execution system. For example, if implemented by hardware, as in another embodiment, it can be implemented by any one of the following technologies known in the art or their combination: a discrete logic circuit having a logic gate circuit for implementing a logic function for a data signal, a dedicated integrated circuit having a suitable combination of logic gate circuits, a programmable gate array (PGA), a field programmable gate array (FPGA), etc.

[0112] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0113] In the description of the present invention, it is to be understood that the terms “center”, “longitudinal”, “lateral”, “length”, “width”, “thickness”, “up”, “down”, “front”, “back”, “left”, “right”, “vertical”, “horizontal”, “top”, “bottom”, “inside”, “outside”, “clockwise”, “counterclockwise”, “axial”, “radial”, “circumferential”, etc., indicating orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0114] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0115] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like 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, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0116] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0117] Although the embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations of the present invention. A person skilled in the art may change, modify, replace and vary the above embodiments within the scope of the present invention.

Claims

1. A method for measuring the minimum turning diameter of a vehicle, characterized in that: The measuring method comprises the following steps: Obtaining the movement stroke of each wheel when the vehicle turns, and obtaining the rear wheel track of the vehicle; Determining a left front wheel turning radius and a right front wheel turning radius of the vehicle according to the movement stroke of each wheel and the rear wheel track; Determining a minimum turning diameter of the vehicle according to the left front wheel turning radius and the right front wheel turning radius; The step of obtaining the movement stroke of each wheel when the vehicle turns includes: When the vehicle turns, the rotation parameters of the corresponding wheels are detected by sensors arranged corresponding to each wheel; Determine the movement stroke of each wheel according to the rotation parameter of each wheel; The rotation parameter includes a count value of a sensor provided corresponding to each wheel, wherein the left front wheel turning radius and the right front wheel turning radius of the vehicle are determined according to the movement stroke of each wheel and the rear wheel track, including: The left front wheel turning radius is determined according to the count value of the sensor corresponding to the left rear wheel, the count value of the sensor corresponding to the right rear wheel, the count value of the sensor corresponding to the left front wheel, and the rear wheel track, wherein the left front wheel turning radius is obtained according to the following formula: Wherein, R3 is the turning radius of the left front wheel, b is the rear wheel track, n1 is the count value of the sensor corresponding to the left rear wheel, n2 is the count value of the sensor corresponding to the right rear wheel, and n3 is the count value of the sensor corresponding to the left front wheel; The right front wheel turning radius is determined according to the count value of the sensor corresponding to the left rear wheel, the count value of the sensor corresponding to the right rear wheel, the count value of the sensor corresponding to the right front wheel and the rear wheel track, wherein the right front wheel turning radius is obtained according to the following formula: Wherein, R4 is the turning radius of the right front wheel, b is the wheelbase of the rear wheels, n1 is the count value of the sensor corresponding to the left rear wheel, n2 is the count value of the sensor corresponding to the right rear wheel, and n4 is the count value of the sensor corresponding to the right front wheel; The method further comprises: The left rear wheel turning radius is obtained according to the following formula: Wherein, R1 is the turning radius of the left rear wheel, b is the rear wheel track, n1 is the count value of the sensor corresponding to the left rear wheel, and n2 is the count value of the sensor corresponding to the right rear wheel; The right rear wheel turning radius is obtained according to the following formula: Wherein, R2 is the turning radius of the right rear wheel, b is the rear wheel track, n1 is the count value of the sensor corresponding to the left rear wheel, and n2 is the count value of the sensor corresponding to the right rear wheel; Determine the left rear wheel turning radius and the right rear wheel turning radius according to the count value of the sensor corresponding to the left rear wheel, the count value of the sensor corresponding to the right rear wheel and the rear wheel track; Before determining the minimum turning diameter of the vehicle according to the left front wheel turning radius and the right front wheel turning radius, the method further includes: determining a difference in axle loads between front and rear axles of the vehicle; Determine a correction coefficient according to the axle load difference, wherein if the front axle load of the vehicle is heavier than the rear axle load, the correction coefficient is positive, and if the front axle load of the vehicle is lighter than the rear axle load, the correction coefficient is negative; The left front wheel turning radius and the right front wheel turning radius are corrected respectively according to the correction coefficient.

2. The measuring method according to claim 1, characterized in that: After determining the left front wheel turning radius and the right front wheel turning radius of the vehicle according to the movement stroke of each wheel and the rear wheel track, the method further includes: The channel circle diameter of the vehicle is determined according to the left front wheel turning radius and the right front wheel turning radius.

3. A computer-readable storage medium, characterized in that: A vehicle minimum turning diameter measurement program is stored thereon, and when the vehicle minimum turning diameter measurement program is executed by a processor, a vehicle minimum turning diameter measurement method as described in any one of claims 1-2 is implemented.

4. A measuring instrument, characterized in that: The invention comprises a memory, a processor and a vehicle minimum turning diameter measurement program stored in the memory and executable on the processor. When the processor executes the vehicle minimum turning diameter measurement program, the vehicle minimum turning diameter measurement method as described in any one of claims 1 to 2 is implemented.

5. A device for measuring the minimum turning diameter of a vehicle, characterized in that: include: A detection module, used to detect the movement travel of each wheel when the vehicle turns; A measuring instrument, used for obtaining the rear wheel track of the vehicle, and determining the left front wheel turning radius and the right front wheel turning radius of the vehicle according to the movement stroke of each wheel and the rear wheel track, and determining the minimum turning diameter of the vehicle according to the left front wheel turning radius and the right front wheel turning radius; The detection module comprises: A sensor provided corresponding to each wheel, for detecting a rotation parameter of the corresponding wheel when the vehicle turns; A data acquisition unit, used to collect the rotation parameters of each wheel to determine the movement stroke of each wheel; The rotation parameter includes a count value of a sensor provided for each wheel, and the measuring instrument is further used for: The left front wheel turning radius is determined according to the count value of the sensor corresponding to the left rear wheel, the count value of the sensor corresponding to the right rear wheel, the count value of the sensor corresponding to the left front wheel, and the rear wheel track, wherein the left front wheel turning radius is obtained according to the following formula: Wherein, R3 is the turning radius of the left front wheel, b is the rear wheel track, n1 is the count value of the sensor corresponding to the left rear wheel, n2 is the count value of the sensor corresponding to the right rear wheel, and n3 is the count value of the sensor corresponding to the left front wheel; The right front wheel turning radius is determined according to the count value of the sensor corresponding to the left rear wheel, the count value of the sensor corresponding to the right rear wheel, the count value of the sensor corresponding to the right front wheel and the rear wheel track, wherein the right front wheel turning radius is obtained according to the following formula: Wherein, R4 is the turning radius of the right front wheel, b is the wheelbase of the rear wheels, n1 is the count value of the sensor corresponding to the left rear wheel, n2 is the count value of the sensor corresponding to the right rear wheel, and n4 is the count value of the sensor corresponding to the right front wheel; The measuring instrument is also used to obtain the turning radius of the left rear wheel according to the following formula: Wherein, R1 is the turning radius of the left rear wheel, b is the rear wheel track, n1 is the count value of the sensor corresponding to the left rear wheel, and n2 is the count value of the sensor corresponding to the right rear wheel; the turning radius of the right rear wheel is obtained according to the following formula: Wherein, R2 is the turning radius of the right rear wheel, b is the rear wheel track, n1 is the count value of the sensor corresponding to the left rear wheel, and n2 is the count value of the sensor corresponding to the right rear wheel; The measuring instrument is also used to determine the axle load difference between the front and rear axles of the vehicle before determining the minimum turning diameter of the vehicle based on the left front wheel turning radius and the right front wheel turning radius, and determine a correction coefficient based on the axle load difference, wherein if the front axle load of the vehicle is heavier than the rear axle load, the correction coefficient is positive, and if the front axle load of the vehicle is lighter than the rear axle load, the correction coefficient is negative, and the left front wheel turning radius and the right front wheel turning radius are respectively corrected according to the correction coefficient.

6. The measuring device according to claim 5, characterized in that The measuring instrument is also used to determine the channel circle diameter of the vehicle according to the left front wheel turning radius and the right front wheel turning radius.

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