A vehicle outline measurement system, method and electronic device

Abstract

The present invention provides a vehicle outline measurement system, method and electronic device, belonging to the technical field of traffic safety, and solves the problem of large measurement errors in the vehicle length in the prior art. A vehicle outline measurement system includes a first gantry, a second gantry, a single-point laser, a left radar, a right radar and a front radar; the first gantry and the second gantry are sequentially arranged on the roadbed of the vehicle; the left radar and the right radar are arranged on the first gantry or the second gantry for detecting the width of the vehicle; the single-point laser is arranged on the first gantry, the detection frequency of the single-point laser is higher than that of the front radar, the single-point laser is used for detecting the moment when the vehicle leaves the first gantry, and sending a marking signal at the moment when the vehicle leaves the first gantry; the front radar is arranged on the second gantry, and the front radar is used for detecting the length of the vehicle.

Description

Technical Field

[0001] The present invention relates to the technical field of traffic safety, and in particular, to a vehicle outline measurement system, method, and electronic device. Background Art

[0002] With the rapid development of the economy, road transportation has become an irreplaceable transportation mode. At the same time, violations such as over-height, over-width, and overloading of trucks have emerged. Therefore, a vehicle outline measurement system is needed to supervise these violations.

[0003] Generally, a vehicle outline measurement system consists of two gantries and three lidar sensors. The left and right lidar sensors are installed on the rear gantry, and the front lidar sensor is installed on the front gantry. The on-site installation environment can determine the detection width and detection length. The detection width is the lane width (W), and the detection length is the distance between the two gantries (L).

[0004] When the vehicle reaches the measurement area, the left and right lidar sensors are triggered first. Until the moment the vehicle passes through the left and right lidar sensors, the front lidar sensor collects data, and then the length, width, and height of the vehicle are calculated. The calculation formulas are as follows:

[0005] Vehicle width = detection width (lane width) - left lidar measurement value (distance from the left edge of the vehicle to the left lidar sensor) - right lidar measurement value (distance from the right edge of the vehicle to the right lidar sensor);

[0006] Vehicle height = detection height (lidar installation height) - lidar measurement value (distance from the upper edge of the vehicle to the lidar sensor);

[0007] Vehicle length = detection length (distance between the two gantries) - front lidar measurement value.

[0008] In the non-site law enforcement scenario, the vehicle speed is generally relatively fast (generally with a speed limit of 80 - 100 km / h). When the existing vehicle outline system is operating at a relatively fast speed, the measurement error of the vehicle length is relatively large. For the convenience of analysis and calculation, assume that the vehicle speed during the detection process is calculated at 72 km / h (i.e., 20 m / s), the actual scanning frequency of the lidar is 50 Hz (i.e., the time for one scan is 20 ms, and the time required for a 190° scanning interval is 10 ms). Assume that the length, width, and height of the vehicle to be measured are 10 m × 2 m × 2 m.

[0009] According to the set conditions, the entire detection process of the vehicle takes 0.5 seconds. In theory, 25 frames of effective measurement data can be obtained (if the vehicle positions at the start and end moments of the measurement are considered, the number of frames may increase or decrease by 2). That is, the vehicle moves forward an average of 0.4 meters before there is one frame of measurement data, and there are many measurement blind spots in the entire measurement process.

[0010] Theoretically, the generation of length error mainly occurs in the radar scanning gap and the synchronization of the width and height radars with the front radar (the current analysis does not consider the influence of vehicle shape and color on radar laser measurement). Calculated by the scanning gap, for a vehicle with a speed of 72 km / h, the error caused by the radar scanning gap is about 0.4 meters. Considering that the width and height radars are required to determine whether the rear of the vehicle has passed the gantry to determine the end of detection, if there is a data asynchronization situation (that is, the left and right radars are one frame delayed relative to the front radar to obtain the result that the rear of the vehicle has passed the gantry), the theoretical error will increase to 0.8 meters.

[0011] Therefore, there is a problem of large measurement error of vehicle length in the prior art. Summary of the Invention

[0012] The purpose of the present invention is to provide a vehicle outline measurement system, method and electronic device to alleviate the technical problem of large measurement error of vehicle length existing in the prior art.

[0013] In a first aspect, a vehicle outline measurement system provided by the present invention includes a first gantry, a second gantry, a single-point laser, a left radar, a right radar and a front radar;

[0014] The first gantry and the second gantry are sequentially arranged on the roadbed of the vehicle;

[0015] The left radar and the right radar are arranged on the first gantry or the second gantry and are used to detect the width of the vehicle;

[0016] The single-point laser is arranged on the first gantry. The detection frequency of the single-point laser is higher than that of the front radar. The single-point laser is used to detect the moment when the vehicle leaves the first gantry and send a marking signal at the moment when the vehicle leaves the first gantry;

[0017] The front radar is arranged on the second gantry and is used to detect the length of the vehicle;

[0018] The front radar is a radar device with a built-in code disk. The front radar marks the code disk according to the marking signal sent by the single-point laser and calculates the error distance of the vehicle length according to the marking of the code disk.

[0019] Furthermore, it further includes a signal line;

[0020] One end of the signal line is connected to the single-point laser, and the other end of the signal line is connected to the front radar;

[0021] The front radar receives the signal sent by the single-point laser through the signal line.

[0022] Furthermore, the detection frequency of the single-point laser is 100 Hz to 5000 Hz.

[0023] Further, the single-point laser is disposed at the top, left or right side of the first gantry.

[0024] Further, the left radar and the right radar are respectively disposed at the left and right sides of the first gantry or the second gantry.

[0025] Further, the scale of the code disk is 360 scales or 720 scales.

[0026] Further, it further includes a third-party processor communicatively connected to the front radar.

[0027] In a second aspect, the present invention further provides a method for measuring the outer contour of a vehicle, which is applied to the vehicle outer contour measurement system provided in the first aspect. The method includes:

[0028] When the vehicle passes through the first gantry, the left radar and the right radar detect the width of the vehicle, and the front radar detects the first distance of the current frame and the second distance of the previous frame when the vehicle leaves the first gantry;

[0029] The single-point laser detects the moment when the vehicle leaves the first gantry and sends a marking signal to the front radar;

[0030] The front radar marks the corresponding marking scale on the code disk according to the marking signal, takes the scale corresponding to the code disk when the front radar detects the second distance as the effective distance scale, and calculates the rotation angle turned by the code disk from the effective distance scale to the marking scale;

[0031] Calculate the error distance according to the proportion of the rotation angle in the scale value of the code disk, and calculate the actual distance according to the error distance and the second distance;

[0032] Subtract the actual distance from the distance between the first gantry and the second gantry to obtain the actual vehicle length.

[0033] In a third aspect, the present invention further provides an electronic device, including a memory and a processor. A computer program that can run on the processor is stored in the memory. When the processor executes the computer program, the steps of the method provided in the second aspect are implemented.

[0034] The present invention provides a vehicle outline measurement system, including a first gantry, a second gantry, a single-point laser, a left radar, a right radar, and a front radar; the first gantry and the second gantry are sequentially arranged on the roadbed of the vehicle; the left radar and the right radar are arranged on the first gantry or the second gantry and are used to detect the width of the vehicle; the single-point laser is arranged on the first gantry, the detection frequency of the single-point laser is higher than that of the front radar, the single-point laser is used to detect the moment when the vehicle arrives at or leaves the first gantry, and sends a marking signal at the moment when the vehicle leaves the first gantry; the front radar is arranged on the second gantry and is used to detect the length of the vehicle; the front radar is a radar device with an encoder disk inside, and the front radar marks the encoder disk according to the marking signal sent by the single-point laser, and calculates the error distance of the vehicle length according to the marking of the encoder disk.

[0035] By using the vehicle outline measurement system provided by the present invention, a single-point laser with a detection frequency higher than that of the front radar is arranged on the first gantry to detect the moment when the vehicle leaves the first gantry, and the single-point laser sends a marking signal to the front radar at the moment when the vehicle leaves the first gantry, and makes a corresponding marking in the encoder disk inside the front radar. The scale corresponding to the previous frame of the encoder disk detected by the front radar when the vehicle leaves the first gantry is used as the effective distance point, and the rotation angle of the encoder disk from the effective distance point to the marked point is calculated. Furthermore, the distance traveled by the vehicle from the previous frame when the vehicle leaves the first gantry to the actual moment when the vehicle leaves the first gantry can be calculated as the error distance. By using this error distance, the actual vehicle length can be calculated, thus effectively solving the problem of large measurement error of the vehicle length.

[0036] Correspondingly, a vehicle outline measurement method and an electronic device provided by the present invention also have the above technical effects. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following will briefly introduce the drawings required for use in the description of the specific embodiments or the prior art. Obviously, the following drawings are some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0038] Figure 1 Schematic diagram of the vehicle outline measurement system provided by the embodiment of the present invention Figure 1 ;

[0039] Figure 2 Schematic diagram of the vehicle outline measurement system in the embodiment of the present invention Figure 2 ;

[0040] Figure 3 Schematic diagram of the encoder disk in the embodiment of the present invention;

[0041] Figure 4 This is a flowchart of the vehicle outline measurement method provided by the embodiments of the present invention. Detailed implementation manners

[0042] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings. Apparently, the described embodiments are some but not all of the embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0043] As used in the embodiments of the present invention, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusion. For example, a process, method, system, product, or device that includes a series of steps or units is not limited to the listed steps or units, but optionally further includes other steps or units not listed, or optionally further includes other steps or units inherent to these processes, methods, products, or devices.

[0044] In non-site law enforcement scenarios, the vehicle speed is generally relatively fast (generally with a speed limit of 80 - 100 km / h). When the existing vehicle outline system operates at a relatively high speed, the measurement error of the vehicle length is relatively large. For the convenience of analysis and calculation, assume that the vehicle speed during the detection process is calculated at 72 km / h (i.e., 20 m / s), the actual radar scanning frequency is 50 Hz (i.e., the time for one scan is 20 ms, and the time required for a 190° scanning range is 10 ms). The length, width, and height of the vehicle to be measured are assumed to be calculated as 10 m × 2 m × 2 m.

[0045] According to the set conditions, the entire detection process of the vehicle takes 0.5 seconds, and theoretically 25 frames of valid measurement data can be obtained (if the vehicle positions at the start and end moments of the measurement are considered, the number of data frames may increase or decrease by 2). That is, the vehicle moves forward an average of 0.4 meters before there is one frame of measurement data, and there are many measurement blind spots in the entire measurement process.

[0046] Theoretically, the generation of length errors mainly occurs in the radar scanning gaps and the synchronization between the width / height radar and the front radar (the current analysis does not consider the influence of vehicle shape and color on radar laser measurement for the time being). If calculated based on the scanning gaps, for a vehicle with a speed of 72 km / h, the error caused by the radar scanning gaps is about 0.4 meters. Considering that the width / height radar is required to determine whether the vehicle tail has passed the gantry to determine the end of the detection, if there is a data asynchronization situation (i.e., the left / right radar lags one frame behind the front radar to obtain the result that the vehicle tail has passed the gantry), the theoretical error will increase to 0.8 meters.

[0047] Therefore, there is a problem of relatively large measurement error in the vehicle length in the prior art.

[0048] To solve the above problems, an embodiment of the present invention provides a vehicle outline measurement system.

[0049] Embodiment 1:

[0050] As Figures 1 to 3 shown, an embodiment of the present invention provides a vehicle outline measurement system, including a first gantry 1, a second gantry 2, a single-point laser 3, a left radar 4, a right radar 5, and a front radar 6; the first gantry 1 and the second gantry 2 are sequentially arranged on the roadbed of the vehicle; the left radar 4 and the right radar 5 are arranged on the first gantry 1 or the second gantry 2 for detecting the width of the vehicle; the single-point laser 3 is arranged on the first gantry 1, and the detection frequency of the single-point laser 3 is higher than that of the front radar 6. The single-point laser 3 is used for detecting the moment when the vehicle arrives at or leaves the first gantry 1, and sending a marking signal at the moment when the vehicle leaves the first gantry 1; the front radar 6 is arranged on the second gantry 2, and the front radar 6 is used for detecting the length of the vehicle; the front radar 6 is a radar device with a built-in code disk. The front radar 6 marks the code disk according to the marking signal sent by the single-point laser 3, and calculates the error distance 7 of the vehicle length according to the marking of the code disk.

[0051] By using the vehicle outline measurement system provided by the embodiment of the present invention, a single-point laser 3 with a detection frequency higher than that of the front radar 6 is arranged on the first gantry 1 to detect the moment when the vehicle leaves the first gantry 1. And the single-point laser 3 sends a marking signal to the front radar 6 at the moment when the vehicle leaves the first gantry 1, and makes a corresponding mark in the code disk built in the front radar 6. The scale corresponding to the previous frame of the code disk detected by the front radar 6 when the vehicle leaves the first gantry 1 is used as the effective distance point, and the rotation angle of the code disk from the effective distance point to the marked point is calculated. Furthermore, the distance traveled by the vehicle from the previous frame when the vehicle leaves the first gantry 1 to the moment when the vehicle actually leaves the first gantry 1 can be calculated as the error distance 7. By using this error distance 7, the actual vehicle length can be calculated, thus effectively solving the problem of large measurement error of the vehicle length.

[0052] In a possible implementation manner, the vehicle outline measurement system further includes a signal line. One end of the signal line is connected to the single-point laser 3, and the other end of the signal line is connected to the front radar 6. The front radar 6 receives the signal sent by the single-point laser 3 through the signal line. By setting the signal line to establish communication between the single-point laser 3 and the front radar 6, a marking signal can be sent to the front radar 6 when the single-point laser detects that the vehicle leaves the first gantry 1, thereby improving the accuracy of the vehicle length detection.

[0053] In a possible implementation, the detection frequency of the single-point laser 3 is from 100 Hz to 5000 Hz. Generally, the actual scanning frequency of the front radar 6 is 50 Hz. In this way, the detection frequency of the single-point laser is higher than that of the front radar 6. The single-point laser is used to detect the moment when the vehicle actually leaves the first gantry 1 and complete the corresponding marking on the code disk of the front radar 6, effectively improving the detection accuracy of the vehicle length.

[0054] In a possible implementation, the single-point laser 3 can be set at the top, left or right side of the first gantry 1 according to specific needs.

[0055] In a possible implementation, the left radar 4 and the right radar 5 are respectively arranged on the left and right sides of the first gantry 1 or the second gantry 2. The left radar 4 and the right radar 5 are respectively located on both sides of the first gantry 1 or the second gantry 2 and are used to detect the width of the vehicle. For example, the left radar 4 and the right radar 5 can be respectively arranged on the left and right sides of the first gantry 1, or the left radar 4 and the right radar 5 are respectively arranged on the left and right sides of the second gantry.

[0056] In a possible implementation, the scale of the code disk is 360 scales or 720 scales. The higher the scale, the higher the accuracy of the code disk. Select a suitable scale value according to the specific measurement accuracy requirements.

[0057] In a possible implementation, the vehicle outline measurement system further includes a third-party processor communicatively connected to the front radar 6. The third-party processor receives the detection data and marking data of the front radar 6 and calculates the length of the vehicle based on these data.

[0058] Embodiment 2:

[0059] As Figure 4 shown, the embodiment of the present invention provides a vehicle outline measurement method applied to the vehicle outline measurement system provided in Embodiment 1. The method includes:

[0060] S1: When the vehicle passes through the first gantry 1, the left radar 4 and the right radar 5 detect the width of the vehicle, and the front radar 6 detects the first distance L1 of the current frame and the second distance L2 of the previous frame when the vehicle leaves the first gantry 1.

[0061] The first distance L1 is the distance when the front radar 6 detects that the vehicle leaves the first gantry 1, and the second distance L2 is the distance of the previous frame when the front radar 6 detects that the vehicle leaves the first gantry 1.

[0062] S2: The single-point laser 3 detects the moment when the vehicle leaves the first gantry 1 and sends a marking signal to the front radar 6.

[0063] By virtue of the detection frequency of the single-point laser 3 being higher than that of the front radar 6, the moment when the vehicle actually leaves the first gantry 1 can be marked on the code disk, thereby effectively eliminating the vehicle length measurement error.

[0064] S3: The front radar 6 marks the corresponding marked scale on the code disk according to the marking signal, takes the scale corresponding to the code disk when the front radar 6 detects the second distance L2 as the effective distance scale, and calculates the rotation angle that the code disk has turned from the effective distance scale to the marked scale.

[0065] The rotation angle is the angle that the code disk rotates during the process from the previous frame when the vehicle leaves the first gantry 1 to the moment when the single-point laser 3 detects that the vehicle leaves the first gantry 1.

[0066] S4: Calculate the error distance 7 according to the proportion of the rotation angle in the code disk scale value, and calculate the actual distance according to the error distance 7 and the second distance L2.

[0067] The proportion of the rotation angle in the code disk scale value is multiplied by the difference between the first distance L1 and the second distance L2 to obtain the error distance 7 that the vehicle has traveled from the previous frame when leaving the gantry to the moment when it actually leaves the gantry. (The difference between the first distance L1 and the second distance L2 is the distance that the vehicle travels when the code disk rotates one week, that is, the distance L3 that the vehicle travels when the code disk rotates one cycle). Calculate the actual distance when the vehicle leaves the first gantry 1 according to the second distance L2 and the error distance 7.

[0068] S5: Subtract the actual distance from the interval distance between the first gantry 1 and the second gantry 2 to obtain the actual vehicle length.

[0069] For example: When the vehicle exits the first gantry 1, the single-point laser 3 is triggered first to send a signal to the inside of the front radar 6, marking and recording the moment of the actual physical angle of the mapping code disk. Along with the data of the front radar 6 being uploaded to a third-party processor for data processing, according to the distribution of the marked points in the effective half-region and the invalid half-region of the front radar 6, the length effective distance index value of the previous frame or the next frame is combined for compensation; if the marked point is in the effective half-region, within 20 ms, we consider the vehicle to be moving at a constant speed of 80 km / h. The compensation method is that the length of the current frame is the first distance L1, and the length of the previous frame is the second distance L2. Finally, the true distance L = L2 + (L1 - L2) * (effective distance index value - marked point index value) / code disk scale value; at this time, the measurement length error is S = V * T = 80 km / h * (500 μs + 13.9 μs) ≈ 11.4 mm, (the single-point laser 3 has a frequency of 2 kHz, and the code disk has a frequency of 72 k, where V is the speed and T is the period, 1 / 2 kHz * 1000000 = 500 μs, 1 / 72 k * 1000 = 13.9 μs). The measurement accuracy is improved by nearly 78 times, and the faster the vehicle speed, the more obvious the advantage of this measurement method of the invention. In this way, the two largest periodic errors caused by the trigger period of the left and right radars 5 and the scanning period of the front radar 6 are eliminated.

[0070] Embodiment 3:

[0071] The embodiment of the present invention further provides an electronic device, including a memory and a processor. A computer program that can run on the processor is stored in the memory. When the processor executes the computer program, the steps of the method provided in the above embodiment are implemented. The electronic device adopting the vehicle outline measurement system and method of the present invention has the technical advantage of high vehicle length measurement accuracy, improving the overall performance of the product.

[0072] It should be noted that: Similar reference numerals and letters represent similar items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0073] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the product of the present invention is usually placed during use. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying 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 of the present invention. In addition, the terms "first", "second", "third", etc. are only used for distinguishing descriptions and cannot be understood as indicating or implying relative importance.

[0074] In the description of the present invention, it should also be noted that, unless otherwise clearly specified and defined, the terms "arrangement", "installation", "connection", and "coupling" should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection or an electrical connection; it may be a direct connection or an indirect connection through an intermediate medium, and it may be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0075] Corresponding to the above method, an embodiment of the present invention also provides a computer-readable storage medium. The computer-readable storage medium stores machine-executable instructions. When the computer-executable instructions are called and run by a processor, the computer-executable instructions cause the processor to run the steps of the above method.

[0076] The device provided by the embodiment of the present invention may be specific hardware on the device or software or firmware installed on the device. The implementation principle and the technical effects produced by the device provided by the embodiment of the present invention are the same as those of the foregoing method embodiment. For the sake of brief description, for the parts not mentioned in the device embodiment, reference may be made to the corresponding content in the foregoing method embodiment. Those skilled in the art can clearly understand that, for the convenience and brevity of description, the specific working processes of the foregoing-described system, device, and unit can all refer to the corresponding processes in the above method embodiment, and will not be repeated here.

[0077] In several embodiments provided by the present invention, it should be understood that the disclosed device and method can also be implemented in other ways. The device embodiments described above are merely illustrative. For example, the flowcharts and block diagrams in the drawings show the possible architectures, functions, and operations of devices, methods, and computer program products according to multiple embodiments of the present invention. In this regard, each block in the flowchart or block diagram may represent a module, a program segment, or a part of code, and the module, program segment, or part of code contains one or more executable instructions for implementing the specified logical function. It should also be noted that in some alternative implementations, the functions marked in the blocks may occur in a different order from that marked in the drawings. For example, two consecutive blocks may actually be executed substantially in parallel, and they may sometimes be executed in the reverse order, depending on the functions involved. It should also be noted that each block in the block diagram and / or flowchart, and the combination of blocks in the block diagram and / or flowchart, can be implemented by a dedicated hardware-based system for performing the specified functions or actions, or can be implemented by a combination of dedicated hardware and computer instructions.

[0078] For another example, the division of the units is only a logical function division. In actual implementation, there may be other division methods. For another example, multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the couplings, direct couplings, or communication connections shown or discussed among each other can be through some communication interfaces. The indirect couplings or communication connections of devices or units can be in electrical, mechanical, or other forms.

[0079] The units described as separate components may or may not be physically separated. The components shown as units may or may not be physical units, that is, they can be located in one place or distributed to multiple network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0080] In addition, each functional unit in the embodiments provided by the present invention can be integrated into a processing unit, or each unit can exist physically alone, or two or more units can be integrated into one unit.

[0081] If the above functions are implemented in the form of software function units and sold or used as independent products, they can be stored in a computer-readable storage medium. Based on such an understanding, the technical solution of the present invention, in essence, or the part that contributes to the prior art, or a part of this technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions to enable a computer device (which can be a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the methods described in various embodiments of the present invention. The foregoing storage medium includes: various media such as USB flash drives, mobile hard disks, read-only memories (ROM), random access memories (RAM), magnetic disks, or optical discs that can store program codes.

[0082] Finally, it should be noted that: the above-mentioned embodiments are only specific implementation manners of the present invention, used to illustrate the technical solutions of the present invention, and are not intended to limit them. The protection scope of the present invention is not limited thereto. Although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: any person skilled in the art within the technical scope disclosed by the present invention can still modify the technical solutions recorded in the foregoing embodiments, or can easily think of changes, or perform equivalent replacements for some of the technical features; and these modifications, changes, or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present invention. All should be covered by the protection scope of the present invention. Therefore, the protection scope of the present invention should be subject to the protection scope of the claims.

Claims

1. A vehicle outline measurement system, characterized in that, it includes a first gantry, a second gantry, a single-point laser, a left radar, a right radar and a front radar; the first gantry and the second gantry are sequentially arranged on the roadbed of the vehicle; the left radar and the right radar are arranged on the first gantry or the second gantry, and are used to detect the width of the vehicle; the single-point laser is arranged on the first gantry, the detection frequency of the single-point laser is higher than that of the front radar, the single-point laser is used to detect the moment when the vehicle leaves the first gantry, and sends a marking signal at the moment when the vehicle leaves the first gantry; the front radar is arranged on the second gantry, and the front radar is used to detect the length of the vehicle; the front radar is a radar device with a built-in code disk, the front radar marks the code disk according to the marking signal sent by the single-point laser, and calculates the error distance of the vehicle length according to the marking of the code disk.

2. The vehicle outline measurement system according to claim 1, characterized in that, it further includes a signal line; one end of the signal line is connected to the single-point laser, and the other end of the signal line is connected to the front radar; the front radar receives the signal sent by the single-point laser through the signal line.

3. The vehicle outline measurement system according to claim 1, characterized in that, the detection frequency of the single-point laser is 100 Hz to 5000 Hz.

4. The vehicle outline measurement system according to claim 1, characterized in that, the single-point laser is arranged at the top, left or right side of the first gantry.

5. The vehicle outline measurement system according to claim 1, characterized in that, the left radar and the right radar are respectively arranged on the left and right sides of the first gantry or the second gantry.

6. The vehicle outline measurement system according to claim 1, characterized in that, the scale of the code disk is 360 scales or 720 scales.

7. The vehicle outline measurement system according to claim 1, characterized in that, it further includes a third-party processor communicatively connected to the front radar.

8. A vehicle outline measurement method, characterized in that, it is applied to the vehicle outline measurement system according to any one of claims 1 to 7, and the method includes: when the vehicle passes through the first gantry, the left radar and the right radar detect the width of the vehicle, and the front radar detects the first distance of the current frame and the second distance of the previous frame when the vehicle leaves the first gantry; the single-point laser detects the moment when the vehicle leaves the first gantry and sends a marking signal to the front radar; the front radar marks the corresponding marking scale on the code disk according to the marking signal, takes the scale corresponding to the code disk when the front radar detects the second distance as the effective distance scale, and calculates the rotation angle that the code disk rotates from the effective distance scale to the marking scale; calculate the error distance according to the ratio of the rotation angle to the scale value of the code disk, and calculate the actual distance according to the error distance and the second distance; subtract the actual distance from the interval distance between the first gantry and the second gantry to obtain the actual vehicle length.

9. An electronic device includes a memory and a processor, and a computer program that can run on the processor is stored in the memory, characterized in that, When the processor executes the computer program, the steps of the method described in claim 8 above are implemented.

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