Method for preventing ETC (Electronic Toll Collection) from being disassembled

Abstract

The invention discloses a method for preventing an ETC (Electronic Toll Collection) from being disassembled, and aims to improve the safety of an ETC terminal. An acceleration sensor is integrated in the ETC terminal, so that the motion state of the terminal is monitored in real time; when abnormal movement is detected, an anti-disassembly mechanism is triggered, an alarm is given in time, and an event is recorded; the ETC terminal is effectively prevented from being illegally disassembled and tampered, and the safety and reliability of the system are remarkably improved.

Description

Technical Field

[0001] The present invention relates to the technical field of electronic toll collection processing, and particularly to a method for solving ETC anti-disassembly. Background Art

[0002] The electronic toll collection (ETC) system is a system that uses wireless communication technology to achieve automatic vehicle toll payment, and is widely used in scenarios such as highways and parking lots. The ETC on-board unit (OBU) is the core device in the ETC system, usually installed on the vehicle windshield, and completes vehicle identification and toll payment functions through communication with roadside equipment (RSU).

[0003] To ensure the normal use of the ETC on-board unit and prevent abuse, existing technologies usually equip ETC devices with anti-disassembly functions. Traditional anti-disassembly methods mostly rely on mechanical buttons or simple sensors. When the device is disassembled, the button or sensor is triggered, thereby activating an alarm or disabling the device function. However, this method has significant defects: that is, users may bypass detection by fixing the anti-disassembly button or taking other means, so that the ETC device can still work normally when it is not correctly installed on the vehicle, resulting in the phenomenon of avoiding toll payment.

[0004] In view of the above problems, a more reliable and safer anti-disassembly method is needed to improve the overall security and practicability of the ETC system. Summary of the Invention

[0005] The purpose of this part is to outline some aspects of the embodiments of the present invention and briefly introduce some preferred embodiments. Some simplifications or omissions may be made in this part, as well as in the abstract and title of the present application, to avoid obscuring the purpose of this part, the abstract, and the title, and such simplifications or omissions shall not be used to limit the scope of the present invention.

[0006] In view of the above existing problems, the present invention is proposed. Therefore, the present invention provides a method for solving ETC anti-disassembly to solve the problems raised in the background art.

[0007] To solve the above technical problems, the present invention provides the following technical solution: A method for solving ETC anti-disassembly, comprising:

[0008] Integrating a gyroscope sensor in the ETC device;

[0009] When the ETC device is activated, record the initial angular velocity data output by the gyroscope sensor, and calculate the initial rotation angle based on the initial angular velocity data as the activation posture;

[0010] Real-time monitor the angular velocity data output by the gyroscope sensor, and calculate the current rotation angle based on the angular velocity data as the current posture;

[0011] Compare the difference between the current attitude and the activated attitude. When the difference exceeds a preset threshold, it is determined that the ETC device has been disassembled.

[0012] As a preferred solution of the method for solving ETC anti-disassembly described in the present invention, wherein: the gyroscope sensor is a three-axis gyroscope, and the angular velocity on the three axes of X, Y, and Z is measured by the three-axis gyroscope.

[0013] As a preferred solution of the method for solving ETC anti-disassembly described in the present invention, wherein: when recording the initial angular velocity data, noise reduction and zero-bias calibration processing are performed on the initial angular velocity data.

[0014] As a preferred solution of the method for solving ETC anti-disassembly described in the present invention, wherein: when calculating the initial rotation angle and the current rotation angle, it is obtained by integrating the angular velocity data.

[0015] As a preferred solution of the method for solving ETC anti-disassembly described in the present invention, wherein: when calculating the rotation angle, a sensor fusion algorithm is used to improve the calculation accuracy, and the sensor fusion algorithm includes complementary filtering or Kalman filtering.

[0016] As a preferred solution of the method for solving ETC anti-disassembly described in the present invention, wherein: the preset threshold is set according to the installation position and usage environment of the ETC device.

[0017] As a preferred solution of the method for solving ETC anti-disassembly described in the present invention, wherein: when it is determined that the ETC device has been disassembled, the state of the ETC device is changed to disassembled, and the roadside toll collection system or the user is notified through the communication module.

[0018] In addition, the present invention also provides an on-vehicle ETC terminal device, which is characterized by including:

[0019] A gyroscope sensor for detecting the angular velocity of the ETC device;

[0020] A controller connected to the gyroscope sensor for performing the following steps:

[0021] When the ETC device is activated, record the initial angular velocity data output by the gyroscope sensor, and calculate the initial rotation angle based on the initial angular velocity data as the activated attitude;

[0022] Real-time monitor the angular velocity data output by the gyroscope sensor, and calculate the current rotation angle based on the angular velocity data as the current attitude;

[0023] Compare the difference between the current posture and the activated posture. When the difference exceeds a preset threshold, it is determined that the ETC device has been disassembled.

[0024] As a preferred solution of the ETC in-vehicle terminal device of the present invention, further comprising: a communication module, connected to the controller, for performing data communication with the roadside toll collection system.

[0025] As a preferred solution of the ETC in-vehicle terminal device of the present invention, further comprising: a mechanical anti-disassembly button, connected to the controller, for assisting in determining whether the ETC device has been disassembled.

[0026] Compared with the prior art, the beneficial effects of the invention are: by detecting the position and posture changes of the ETC in-vehicle terminal through the built-in gyroscope sensor, it has higher sensitivity and reliability compared with traditional mechanical buttons or sensors, and can effectively prevent users from avoiding anti-disassembly detection. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the drawings in the following description are only 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. Among them:

[0028] Figure 1 It is the overall flowchart of the method for solving ETC anti-disassembly according to an embodiment of the present invention;

[0029] Figure 2 It is the structural diagram of the ETC device based on the gyroscope for the method for solving ETC anti-disassembly according to an embodiment of the present invention;

[0030] Figure 3 It is the flowchart for determining the state of the ETC device based on gyroscope anti-disassembly for the method for solving ETC anti-disassembly according to an embodiment of the present invention. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0031] In order to make the above objects, features, and advantages of the present invention more obvious and understandable, the following will describe the specific embodiments of the present invention in detail with reference to the drawings of the specification. Obviously, the described embodiments are part of the embodiments of the present invention, rather than all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0032] In the following description, numerous specific details are set forth to provide a thorough understanding of the present invention. However, the present invention may be practiced in other ways than those specifically described herein. Those skilled in the art can make similar extensions without departing from the spirit of the present invention. Therefore, the present invention is not limited by the specific embodiments disclosed below.

[0033] Secondly, as used herein, an "embodiment" or "embodiments" refers to specific features, structures, or characteristics that may be included in at least one implementation of the present invention. The phrase "in one embodiment" that appears in different places in this specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment that excludes other embodiments.

[0034] The present invention will be described in detail with reference to the schematic diagrams. When describing the embodiments of the present invention in detail, for the convenience of explanation, the cross-sectional views showing the device structure will be enlarged locally out of the general scale, and the schematic diagrams are only examples and should not limit the scope of protection of the present invention herein. In addition, in actual production, three-dimensional spatial dimensions including length, width, and depth should be included.

[0035] Meanwhile, in the description of the present invention, it should be noted that the orientation or positional relationships indicated by terms such as "upper, lower, inner, and outer" are based on the orientation or positional relationships shown in the drawings, and are 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 thus should not be construed as a limitation of the present invention. In addition, the terms "first, second, or third" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance.

[0036] Unless otherwise clearly defined and limited in the present invention, the terms "mounted, connected, and coupled" shall be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may also be a mechanical connection, an electrical connection, or a direct connection, and may also be indirectly connected through an intermediate medium, or may be the communication inside two elements. 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.

[0037] Embodiment 1

[0038] Refer to Figures 1 to 3 , which is the first embodiment of the present invention. This embodiment provides a method for solving the problem of ETC anti-disassembly, including:

[0039] S1. Integrate a gyroscope sensor in the ETC device, refer to Figure 2 ;

[0040] Specifically, when the device starts up, the power supply module powers all components (main MCU, gyroscope module, ETC RFSOC, etc.). When the power supply module is working properly, the backup capacitor is in a charging state to store emergency electrical energy. When the main MCU gets powered, it initializes the following functions: detecting the status of the mechanical anti-tampering button (whether it has been triggered), starting the gyroscope module and calibrating the zero bias (eliminating noise in the stationary state), and reading the device activation status (activated / not activated) in the ESAM.

[0041] S2. When the ETC device is activated, record the initial angular velocity data output by the gyroscope sensor, and calculate the initial rotation angle based on the initial angular velocity data as the activation attitude.

[0042] Furthermore, in the activation process, when the user pastes the ETC onto the windshield, the mechanical anti-tampering button is pressed. The main MCU detects the button trigger signal, and then the main MCU commands the gyroscope to enter the high-precision mode, continuously collect the angular velocity data of three axes (X, Y, Z), remove the noise in the collected angular velocity data of three axes (X, Y, Z) through Kalman filtering, and at the same time use the calibrated zero bias (recording the reference value in the stationary state) to integrate the calibrated angular velocity (sampling time interval Δt = 10ms) to calculate the initial rotation angle θ x 、θ y 、θ z , encrypt the initial angle and write it into the ESAM module.

[0043] Specifically, taking the X-axis as an example, the calculation formula for the rotation angle θ x is:

[0044] θ x = θ x (t - 1)+w x (t)·Δt

[0045] where (t - 1) represents the previous moment, and w x (t) represents the angular velocity at the current moment;

[0046] It should be noted that the calculation of the rotation angles θ y and θ z is the same as the calculation of θ x ;

[0047] Specifically, the calculation formula for the rotation angle θ is:

[0048]

[0049] where θ(t) represents the rotation angle at the current moment, θ0 represents the initial angle (usually 0), w(T) represents the angular velocity at time T, and t0 represents the initial time;

[0050] Further, the ESAM module generates a unique device encryption identifier, binds it to the initial angle, and sends an activation completion signal to the roadside unit (RSU) through the radio frequency (RF) system-on-chip (SOC) in the Electronic Toll Collection (ETC) system using the DSRC protocol, and synchronizes it to the highway toll collection system;

[0051] S3. Real-time monitor the angular velocity data output by the gyroscope sensor, and calculate the current rotation angle as the current attitude based on the angular velocity data;

[0052] Further, the gyroscope module outputs three-axis angular velocity data at a frequency of 100 Hz. At this time, through the main MCU, the current rotation angle θ1 x 、θ1 y 、θ1 z is calculated. The calculation method is the same as the calculation of the above rotation angle;

[0053] S4. Compare the difference between the current attitude and the activation attitude. When the difference exceeds a preset threshold, it is determined that the ETC device has been disassembled;

[0054] Further, calculate the difference between the current attitude angle (real-time rotation angle) and the activation attitude (initial rotation angle) to obtain an angle error, refer to Figure 3 ;

[0055] Specifically, set the threshold of the angle error according to the installation position and usage environment of the ETC device. If any axial error exceeds this threshold, it is determined as abnormal displacement (and during this period, continuous 3 sampling overrun is required to trigger an alarm), and the anti-disassembly state is triggered. The current ETC device is locked through the ESAM module, the ETC transaction function is prohibited, and the disassembly event log is recorded; at the same time, the LED shows a red light flashing state (frequency 2 Hz) and is accompanied by a buzzer sounding (lasting 10 seconds). A disassembly alarm signal (including device ID, timestamp) is sent to the roadside unit through the radio frequency system-on-chip in the electronic toll collection system, and an alarm notification is pushed to the owner's mobile phone APP through the Bluetooth module (BT);

[0056] It should be noted that if the input power supply is detected to be interrupted, it is immediately switched to the backup power capacitor for power supply to the following devices. At the same time, the main MCU completes the disassembly state determination and log storage, the ESAM module locks the device and saves the final state; the ETC RF SOC sends the last alarm signal; until the backup power capacitor is exhausted, the main MCU executes the safe shutdown process.

[0057] Those skilled in the art should understand that the embodiments of the present invention can be provided as a method, a system, or a computer program product. Therefore, the present application can take the form of a complete hardware embodiment, a complete software embodiment, or an embodiment combining software and hardware aspects. Moreover, the present application can take the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) that contain computer-usable program code. The solutions in the embodiments of the present application can be implemented using various computer languages. For example, object-oriented programming languages such as Java and interpreted scripting languages such as JavaScript, etc.

[0058] This application is described with reference to the flowcharts and / or block diagrams of methods, apparatuses (systems), and computer program products according to the embodiments of the present application. It should be understood that each flow and / or block in the flowchart and / or block diagram, as well as the combination of flows and / or blocks in the flowchart and / or block diagram, can be implemented by computer program instructions. These computer program instructions can be provided to the processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing devices to generate a machine, such that the instructions executed by the processor of the computer or other programmable data processing devices generate means for implementing the functions specified in one Figure 1 flow or multiple flows and / or blocks Figure 1 or multiple blocks.

[0059] These computer program instructions can also be stored in a computer-readable memory that can direct a computer or other programmable data processing device to work in a specific manner, such that the instructions stored in the computer-readable memory generate a manufactured article including instruction means that implement the functions specified in one Figure 1 flow or multiple flows and / or blocks Figure 1 or multiple blocks.

[0060] These computer program instructions can also be loaded onto a computer or other programmable data processing device, such that a series of operation steps are executed on the computer or other programmable device to generate a computer-implemented process, and thus the instructions executed on the computer or other programmable device provide steps for implementing the functions specified in one Figure 1 flow or multiple flows and / or blocks Figure 1 or multiple blocks.

[0061] Although the preferred embodiments of the present application have been described, those skilled in the art can make additional changes and modifications once they learn the basic creative concepts. Therefore, the appended claims are intended to be construed as including the preferred embodiments as well as all changes and modifications that fall within the scope of the present application.

[0062] Obviously, those skilled in the art can make various changes and modifications to this application without departing from the spirit and scope of this application. Thus, if these modifications and variations of this application fall within the scope of the claims of this application and their equivalent technologies, this application is also intended to include these modifications and variations.

Claims

1. A method for solving the problem of ETC anti-disassembly, characterized in that: include: Integrate gyro sensors in ETC devices; When the ETC device is activated, the initial angular velocity data output by the gyroscope sensor is recorded, and the initial rotation angle is calculated according to the initial angular velocity data as the activation posture; Monitor the angular velocity data output by the gyroscope sensor in real time, and calculate the current rotation angle as the current posture according to the angular velocity data; The difference between the current posture and the activation posture is compared, and when the difference exceeds a preset threshold, it is determined that the ETC device is disassembled.

2. The method for solving the ETC anti-disassembly problem as claimed in claim 1, characterized in that: The gyro sensor is a three-axis gyro, which measures the angular velocity on the three axes of X, Y, and Z.

3. The method for solving the ETC anti-disassembly problem as claimed in claim 1, characterized in that: When recording the initial angular velocity data, the initial angular velocity data is subjected to denoising and zero bias calibration processing.

4. The method for solving the ETC anti-disassembly problem as claimed in claim 1, characterized in that: When calculating the initial rotation angle and the current rotation angle, they are obtained by integrating the angular velocity data.

5. The method for solving the ETC anti-disassembly problem as claimed in claim 4, characterized in that: When calculating the rotation angle, a sensor fusion algorithm is used to improve calculation accuracy, wherein the sensor fusion algorithm includes complementary filtering or Kalman filtering.

6. The method for solving the ETC anti-disassembly problem as claimed in claim 1, characterized in that: The preset threshold is set according to the installation location and usage environment of the ETC device.

7. The method for solving the ETC anti-disassembly problem as claimed in claim 1, characterized in that: When it is determined that the ETC device is disassembled, the state of the ETC device is changed to disassembled, and the roadside toll collection system or the user is notified through the communication module.

8. An ETC vehicle-mounted terminal device, characterized in that: include: A gyroscope sensor for detecting the angular velocity of the ETC device; A controller, connected to the gyro sensor, is used to perform the following steps: When the ETC device is activated, the initial angular velocity data output by the gyroscope sensor is recorded, and an initial rotation angle is calculated according to the initial angular velocity data as an activation posture; Monitor the angular velocity data output by the gyro sensor in real time, and calculate the current rotation angle as the current posture according to the angular velocity data; The difference between the current posture and the activation posture is compared, and when the difference exceeds a preset threshold, it is determined that the ETC device is disassembled.

9. The ETC vehicle-mounted terminal device according to claim 8, characterized in that: It also includes a communication module, which is connected to the controller and is used for data communication with the roadside toll collection system.

10. The ETC vehicle-mounted terminal device according to claim 8, characterized in that: It also includes a mechanical anti-disassembly button, which is connected to the controller and is used to assist in determining whether the ETC device has been disassembled.

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