Electromagnetic sensing tire recognizer layout structure and tire recognition method thereof

Abstract

The invention relates to the technical field of electromagnetic sensing, and discloses an electromagnetic sensing tire recognizer layout structure and a tire recognition method thereof. An electromagnetic sensing tire recognizer comprises a miniature electromagnetic sensing coil array, a controller and a memory. The tire recognition method of the electromagnetic sensing tire recognizer comprises the following steps: acquiring a trigger signal in real time through the miniature electromagnetic sensing coil array when a truck is rolled; performing data analysis on the trigger signal through the controller, and judging a single tire or a double tire; and a data analysis result of the controller is displayed through the display screen. According to the invention, the tire identification accuracy is effectively improved.

Description

Technical Field

[0001] The present invention relates to the technical field of electromagnetic sensing, and particularly to a layout structure of an electromagnetic sensing tire identifier and a tire identification method thereof. Background Art

[0002] In the fields of intelligent transportation systems and vehicle safety monitoring, accurate monitoring and identification of vehicle tire conditions are of great significance. As a key component for a vehicle to contact the ground, the condition of the tire directly affects driving safety and traffic management efficiency. With the rapid development of the transportation industry, the vehicle ownership has increased sharply, and trucks frequently shuttle on the roads, which puts higher requirements on tire monitoring technologies.

[0003] The traditional identification technologies have the following deficiencies:

[0004] (1) Limitations of traditional sensor technologies; the pressure sensor judges single or double tires based on the pressure distribution when the wheel rolls, but the sensor is vulnerable to mechanical wear and has a short service life; the quartz sensor utilizes the characteristic that a quartz crystal generates a charge signal when pressed, but the quartz element is sensitive to dust and humidity, and the misjudgment rate is as high as; radio frequency identification requires embedding an electronic tag in the tire, with high implementation costs and relying on the active cooperation of the vehicle, making it difficult to popularize; the vision recognition technology captures tire images through a camera, but is significantly affected by light and occlusion, and its performance drops sharply at night or in rainy and snowy weather;

[0005] (2) The traditional coil layout method is usually a single-direction linear arrangement and cannot adapt to different roads.

[0006] Therefore, the present application has developed a layout structure of an electromagnetic sensing tire identifier and a tire identification method to solve the limitations of traditional sensors and coil layouts, and effectively improve the accuracy of tire identification. Summary of the Invention

[0007] (1) Technical Problems to be Solved

[0008] In view of the deficiencies of the prior art, the present application provides a layout structure of an electromagnetic sensing tire identifier and a tire identification method thereof.

[0009] (2) Technical Solutions

[0010] To solve the above problems, the present application provides the following technical solutions:

[0011] A layout structure of an electromagnetic sensing tire identifier is provided on a lane for identifying single or double tires of a truck wheel. The electromagnetic sensing tire identifier includes a micro electromagnetic sensing coil array;

[0012] The micro electromagnetic sensing coil array is composed of N micro electromagnetic sensing coils embedded in the ground, and is arranged in parallel with the scale edge perpendicular to the oncoming vehicle direction within half of the road surface; the micro electromagnetic sensing coil array is used to obtain the rolling data information of the wheels when a truck passes by.

[0013] The micro electromagnetic sensing coil is arranged within a rectangular area with a width of 6 cm.

[0014] The lateral side line spacing of adjacent micro electromagnetic sensing coil matrix areas is 8 - 12 cm.

[0015] The layout structure of the micro electromagnetic sensing coil array includes a first coil layout structure and a second coil layout structure.

[0016] Preferably, the first coil layout structure is arranged in a straight line; the first coil layout structure is composed of a row of the micro electromagnetic sensing coils; the micro electromagnetic sensing coils are arranged in a single straight line, and the center line of the micro electromagnetic sensing coil matrix area is on the same axis.

[0017] Preferably, the second coil layout structure is arranged in a cross - symmetric manner; the second coil layout structure is composed of two rows of the micro electromagnetic sensing coils, and the two rows of micro electromagnetic sensing coils are arranged in an alternating and symmetric manner, and the distance between the symmetric center lines does not exceed 100 cm.

[0018] A tire recognition method for an electromagnetic sensing tire identifier, applying an electromagnetic sensing tire identifier and its layout structure according to any one of claims 1 - 4, includes:

[0019] Obtaining the trigger signal in real time through the micro electromagnetic sensing coil array when the truck rolls.

[0020] Analyzing the data of the trigger signal through the controller to judge single - or dual - tires.

[0021] Displaying the data analysis result of the controller through a display screen.

[0022] Preferably, the obtaining the trigger signal in real time through the micro electromagnetic sensing coil array when the truck rolls specifically includes:

[0023] When a truck passes by, if the micro electromagnetic sensing coil detects a trigger signal, it is recorded as 1; if the micro electromagnetic sensing coil does not detect a trigger signal, it is recorded as 0.

[0024] When a metal object more than 10 cm away from the ground approaches the micro electromagnetic sensing coil, no trigger signal is generated.

[0025] Preferably, when the truck passes by, the micro electromagnetic sensing coil detects a trigger signal, which is recorded as 1; when the micro electromagnetic sensing coil does not detect a trigger signal, it is recorded as 0, specifically including:

[0026] Intercept the trigger state combinations of adjacent 3 micro electromagnetic sensing coils; if the combination is 100, 001, 110, 011, or 010, it is determined as a single tire; if the combination is 111 or 101, it is determined as a double tire;

[0027] According to the number N of continuously triggered micro electromagnetic sensing coils, approximately calculate the tire width.

[0028] Preferably, the intercepting the trigger state combinations of adjacent 3 micro electromagnetic sensing coils specifically includes:

[0029] If a cross-symmetrically arranged coil array is adopted, perform data fusion on the trigger signals of the two rows of micro electromagnetic sensing coils;

[0030] When any row of the two rows of micro electromagnetic sensing coils detects 111 or 101, it is determined as a double tire;

[0031] When both rows of micro electromagnetic sensing coils are determined as single tires and the coincidence degree of the trigger areas is greater than or equal to 80%, it is determined as a single tire.

[0032] Preferably, the approximately calculating the tire width according to the number N of continuously triggered micro electromagnetic sensing coils specifically includes:

[0033] The data expression for approximately calculating the tire width is:

[0034] W = [6N + S(N - 1)]·k (1)

[0035] In formula (1), W is the tire width, S is the lateral side line spacing of the adjacent micro electromagnetic sensing coil matrix area, N is the number of continuously triggered micro electromagnetic sensing coils, and N≥2, k is the dynamic optimization coefficient.

[0036] Preferably, an electromagnetic sensing tire identifier, the electromagnetic sensing tire identifier further includes a controller, and the tire identification method as claimed in claim 4 is applied to the controller; the controller is used to scan the on-off states of the micro electromagnetic sensing coil array and judge single or double tires; the micro electromagnetic sensing coil array performs data transmission with the controller through a wiring terminal or a plug socket, and the controller performs data transmission with a remote server through wireless communication.

[0037] (III) Beneficial effects

[0038] Compared with the prior art, the present application provides an electromagnetic sensing tire identifier layout structure and a tire identification method thereof, which have the following beneficial effects:

[0039] 1. An electromagnetic sensing tire identifier layout structure and a tire identification method thereof embed a micro electromagnetic sensing coil into the ground, have no physical contact with the wheel, greatly improve the service life, and effectively filter out splashing metal debris by setting a sensitivity threshold, reducing the misjudgment rate;

[0040] 2. An electromagnetic sensing tire identifier layout structure and a tire identification method thereof solve the problem of missed detection of the gap between dual tires in a single-row layout by arranging the double-row coils in a staggered manner, improving the detection accuracy;

[0041] The additional aspects and advantages of the present application will be partly given in the following description, partly will become obvious from the following description, or will be understood through the practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] The above and / or additional aspects and advantages of the present application will become obvious and easy to understand from the description of the embodiments in conjunction with the following drawings, wherein:

[0043] Figure 1 is a schematic structural diagram of a tire identification method of an electromagnetic sensing tire identifier of the present application;

[0044] Figure 2 is a schematic structural diagram of a linear layout structure of an electromagnetic sensing tire identifier layout structure of the present application;

[0045] Figure 3 is a schematic structural diagram of a linear cross-symmetric layout structure of an electromagnetic sensing tire identifier layout structure of the present application. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0046] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present application without creative efforts shall fall within the protection scope of the present application.

[0047] The terms "first" and "second" in the description and claims of the present application may explicitly or implicitly include one or more of such features. In the description of the present application, unless otherwise specified, the meaning of "a plurality" is two or more. In addition, "and / or" in the description and claims means at least one of the connected objects, and the character " / " generally means an "or" relationship between the related objects before and after.

[0048] In the description of the present application, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present application 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 should not be construed as a limitation to the present application.

[0049] In the description of the present application, it should be noted that unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific situations.

[0050] Please refer to Figure 1 - Figure 2 , the present application provides a new technical solution: a layout structure of an electromagnetic sensing tire identifier, which is arranged on a lane and used to identify single or double tires of truck wheels. The electromagnetic sensing tire identifier includes a micro electromagnetic sensing coil array;

[0051] The micro electromagnetic sensing coil array is composed of N micro electromagnetic sensing coils embedded in the ground, and is arranged perpendicular to the oncoming direction of the lane and parallel to the edge of the weighing platform within half of the road surface; the micro electromagnetic sensing coil array is used to obtain the rolling data information of the wheels when the truck passes by.

[0052] The micro electromagnetic sensing coils are arranged within a rectangular area with a width of 6 cm;

[0053] The lateral side line spacing of adjacent micro electromagnetic sensing coil matrix areas is 8 - 12 cm;

[0054] The layout structure of the micro electromagnetic sensing coil array includes a first coil layout structure and a second coil layout structure.

[0055] In the present invention, the first coil layout structure is arranged in a straight line; the first coil layout structure is composed of a row of the micro electromagnetic sensing coils; the micro electromagnetic sensing coils are arranged in a single straight line, and the center line of the micro electromagnetic sensing coil matrix area is located on the same axis.

[0056] In the present invention, the second coil layout structure is arranged in a cross-symmetric manner; the second coil layout structure is composed of two rows of the micro electromagnetic sensing coils, and the two rows of the micro electromagnetic sensing coils are arranged in a staggered and symmetric manner, and the distance between the symmetric centerlines does not exceed 100 cm.

[0057] A tire identification method of an electromagnetic sensing tire identifier, applying the electromagnetic sensing tire identifier and its layout structure according to any one of claims 1-4, comprising:

[0058] Obtaining the trigger signal in real time when the truck runs over through the micro electromagnetic sensing coil array;

[0059] Performing data analysis on the trigger signal through the controller to judge single or dual tires;

[0060] Displaying the data analysis result of the controller through a display screen.

[0061] In a specific embodiment, the controller scans the coil state at a frequency not lower than 1 kHz to ensure the complete capture of the tire rolling signal of a vehicle with a speed greater than 80 km / h.

[0062] In the present invention, obtaining the trigger signal in real time when the truck runs over through the micro electromagnetic sensing coil array specifically includes:

[0063] When the truck passes by, if the micro electromagnetic sensing coil detects a trigger signal, it is recorded as 1; when the micro electromagnetic sensing coil does not detect a trigger signal, it is recorded as 0;

[0064] When a metal object more than 10 cm away from the ground approaches the micro electromagnetic sensing coil, no signal is triggered.

[0065] In a specific embodiment, when obtaining the trigger signal of the truck running over, if the continuous triggering duration of a single coil is less than 10 ms, it is regarded as an instantaneous interference signal and eliminated; if the number of trigger times of the same coil within 10 ms is ≥ 3 times, it is determined as a valid signal, otherwise it is regarded as noise.

[0066] In the present invention, when the truck passes by, if the micro electromagnetic sensing coil detects a trigger signal, it is recorded as 1; when the micro electromagnetic sensing coil does not detect a trigger signal, it is recorded as 0, specifically including:

[0067] Intercepting the trigger state combination of three adjacent micro electromagnetic sensing coils; if the combination is 100, 001, 110, 011, or 010, it is determined as a single tire; if the combination is 111 or 101, it is determined as a dual tire;

[0068] Approximately calculating the tire width according to the number N of continuously triggered micro electromagnetic sensing coils.

[0069] In a specific embodiment, the width of a single tire is set to 20 cm, the width of a double tire is 43 cm, and the lateral side line spacing of adjacent micro electromagnetic sensing coil matrix regions is 12 cm; when a truck passes through the micro electromagnetic sensing coil array and only one micro electromagnetic sensing coil is triggered, that is, 100, 001 or 010 appears, and the width of the tire is less than or equal to 30 cm, it is determined as a single tire; when two micro electromagnetic sensing coils are triggered, that is, 110 or 011 appears, and the width range of the tire is 24 - 48 cm, it is judged as a double tire; when three micro electromagnetic sensing coils are triggered, that is, 111 appears, and the width range of the tire is 42 - 66 cm, it is judged as a double tire; when two micro electromagnetic sensing coils appear and 101 appears, and the width of the tire is greater than or equal to 42 cm, it is judged as a double tire.

[0070] In the present invention, the combination of the triggering states of intercepting adjacent 3 micro electromagnetic sensing coils specifically includes:

[0071] If a coil array arranged in a cross-stack manner is adopted, data fusion is performed on the trigger signals of two rows of micro electromagnetic sensing coils;

[0072] When 111 or 101 is detected in any one of the two rows of micro electromagnetic sensing coils, it is determined as a double tire;

[0073] When both rows of micro electromagnetic sensing coils are determined as single tires and the coincidence degree of the triggering regions is greater than or equal to 80%, it is determined as a single tire.

[0074] In the present invention, the approximate calculation of the tire width according to the number N of continuously triggered micro electromagnetic sensing coils specifically includes:

[0075] The data expression for approximately calculating the tire width is:

[0076] W = [6N + S(N - 1)]·k (1)

[0077] In formula (1), W is the tire width, S is the lateral side line spacing of adjacent micro electromagnetic sensing coil matrix regions, N is the number of continuously triggered micro electromagnetic sensing coils, and N ≥ 2, k is a dynamic optimization coefficient.

[0078] In a specific embodiment, k is a dynamic optimization coefficient, which is used to adjust the calculation result according to the actual scenario to compensate for the differences in sensor layout or tire shape and improve the accuracy; 6N is the fixed contribution of each triggered micro electromagnetic sensing coil to the tire width.

[0079] An electromagnetic sensing tire identifier, the electromagnetic sensing tire identifier further includes a controller, and the tire identification method described in claim 4 is applied to the controller; the controller is used to scan the on-off state of the micro electromagnetic sensing coil array and judge single or double tires; the micro electromagnetic sensing coil array transmits data to the controller through a terminal or a plug socket, and the controller transmits data to a remote server through wireless communication.

[0080] In a specific embodiment, the controller uses the STM32 series, is connected to the micro electromagnetic sensing coil array through a terminal, scans the on-off state of the coil in real time, and the controller communicates wirelessly with the remote server to transmit the identification result; the wireless communication at least includes Zigbee, LoRa, NB-IoT or 4G / 5G; the memory selects an industrial-grade SD card, is wired to the controller through a USB interface, and stores the single / double tire determination logic and historical data, such as the identification records of past vehicles.

[0081] In the description of this specification, the description with reference to terms such as "an embodiment", "some embodiments", "schematic embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representations of the above terms do 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.

[0082] Although the embodiments of the present application have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principle and spirit of the present application. The scope of the present application is defined by the appended claims and their equivalents.

Claims

1. A layout structure of an electromagnetic sensing tire identifier is arranged on a lane and used to identify single or dual tires of a truck wheel. It is characterized in that The electromagnetic sensing tire identifier includes a micro electromagnetic sensing coil array; The micro electromagnetic sensing coil array is composed of N micro electromagnetic sensing coils embedded in the ground, and is arranged perpendicular to the oncoming direction of the lane and parallel to the edge of the weighing platform within half of the road surface; the micro electromagnetic sensing coil array is used to obtain the rolling data information of the wheels when the truck passes by; The micro electromagnetic sensing coils are arranged within a rectangular area with a width of 6 cm; The lateral side line spacing of adjacent micro electromagnetic sensing coil matrix areas is 8 - 12 cm; The layout structure of the micro electromagnetic sensing coil array includes a first coil layout structure and a second coil layout structure.

2. The layout structure of an electromagnetic sensing tire identifier according to claim 1, characterized in that, The first coil layout structure is arranged in a straight line; the first coil layout structure is composed of a row of the micro electromagnetic sensing coils; the micro electromagnetic sensing coils are arranged in a single straight line, and the center line of the micro electromagnetic sensing coil matrix area is on the same axis.

3. The layout structure of an electromagnetic sensing tire identifier according to claim 1, wherein The second coil layout structure is arranged in a cross - symmetric manner; the second coil layout structure is composed of two rows of the micro electromagnetic sensing coils, and the two rows of the micro electromagnetic sensing coils are arranged in an alternating and symmetric manner, and the distance between the symmetric center lines does not exceed 100 cm.

4. A tire identification method for an electromagnetic sensing tire identifier, characterized in that, Applied to the layout structure of an electromagnetic sensing tire identifier according to any one of claims 1 - 3, including: Obtaining the trigger signal in real time when the truck rolls over through the micro electromagnetic sensing coil array; Analyzing the data of the trigger signal through the controller to judge single or double tires; Displaying the data analysis result of the controller through the display screen.

5. The tire identification method of an electromagnetic sensing tire identifier according to claim 4, characterized in that, The obtaining the trigger signal in real time when the truck rolls over through the micro electromagnetic sensing coil array specifically includes: When the truck passes by, if the micro electromagnetic sensing coil detects the trigger signal, it is recorded as 1; when the micro electromagnetic sensing coil does not detect the trigger signal, it is recorded as 0; When a metal object more than 10 cm away from the ground approaches the micro electromagnetic sensing coil, no signal is triggered.

6. The tire recognition method of an electromagnetic sensing tire identifier according to claim 5, characterized in that, The when the truck passes by, if the micro electromagnetic sensing coil detects the trigger signal, it is recorded as 1; when the micro electromagnetic sensing coil does not detect the trigger signal, it is recorded as 0 specifically includes: Intercepting the trigger state combination of adjacent 3 micro electromagnetic sensing coils; if the combination is 100, 001, 110, 011, or 010, it is determined as a single tire; if the combination is 111 or 101, it is determined as a double tire; Approximately calculating the tire width according to the number N of continuously triggered micro electromagnetic sensing coils.

7. The tire recognition method of an electromagnetic sensing tire identifier according to claim 6, characterized in that, The intercepting the trigger state combination of adjacent 3 micro electromagnetic sensing coils specifically includes: If a coil array arranged in a cross - stacked manner is adopted, data fusion is performed on the trigger signals of the two rows of micro electromagnetic sensing coils; When any one of the two rows of micro electromagnetic sensing coils detects 111 or 101, it is determined as a double tire; When both of the two rows of micro electromagnetic sensing coils are determined as single tires and the coincidence degree of the trigger areas is greater than or equal to 80%, it is determined as a single tire.

8. The tire identification method of an electromagnetic sensing tire identifier according to claim 6, characterized in that, The approximately calculating the tire width according to the number N of continuously triggered micro electromagnetic sensing coils specifically includes: The data expression for approximately calculating the tire width is: W = [6N + S(N - 1)]·k (1) In formula (1), W is the tire width, S is the lateral side line spacing of adjacent micro electromagnetic sensing coil matrix regions, N is the number of continuously triggered micro electromagnetic sensing coils, and N≥2, and k is a dynamic optimization coefficient.

9. An electromagnetic sensing tire identifier, characterized in that, The electromagnetic sensing tire identifier further includes a controller, and the tire identification method as described in claim 4 is applied to the controller; the controller is configured to scan the on / off states of the micro electromagnetic sensing coil array and determine single or dual tires; the micro electromagnetic sensing coil array performs data transmission with the controller through a wiring terminal or a plug socket, and the controller performs data transmission with a remote server through wireless communication.

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