Vehicle overweight intelligent detection management method and system

Abstract

The invention discloses a vehicle overweight intelligent detection and management method, the method is applied to a vehicle overweight intelligent detection and management system, the system comprises a vehicle overweight intelligent detection and management device, and the method comprises the following steps: carrying out installation position test and parameter calibration on a pressure sensor and a vibration sensor; when the vehicle is loaded, equipment wakes up and detects the load; the equipment maintains communication with a vehicle ECU and realizes an anti-disassembly function; and pressure sensor abnormity detection processing. The method comprises the following steps: testing installation positions of a pressure sensor and a vibration sensor and calibrating parameters; when the vehicle is loaded, equipment wakes up and detects the load; the equipment maintains communication with a vehicle ECU and realizes an anti-disassembly function; according to the invention, the pressure sensor performs abnormal detection and processing, and the load detection and the vehicle locking technology are combined, so that the overload condition of the vehicle can be eradicated, the vehicle is in a reasonable load, the related maintenance work of a vehicle factory is reduced, the related after-sales expenditure of the vehicle factory is reduced, the vehicle is not overloaded, and the stability of the vehicle is improved.

Description

Technical Field

[0001] The present invention relates to the field of vehicle overweight management, and in particular to a vehicle overweight intelligent detection management method and system. Background Art

[0002] Vehicle overloading is an issue that cannot be ignored in today's society. Many accidents on the road are caused by vehicle overloading, and many trucks are seriously overloaded, causing the vehicles to operate in overload for a long time. Many parts of the vehicles are damaged during the warranty period and must be provided by the vehicle manufacturer for related maintenance services. Long-term overloading increases a lot of unnecessary after-sales repairs, indirectly damaging the interests of the vehicle manufacturers.

[0003] Because car owners only consider their own interests and ignore safety, vehicles are overloaded for a long time, which is prone to traffic accidents and causes some harm to society. Car manufacturers, based on their own interests, can install this equipment on relevant vehicles, calculate the vehicle load in real time through pressure sensors, and lock the vehicles if the load exceeds the limit. Once the load returns to normal, the relevant locking restrictions will be lifted immediately.

[0004] Since GPS-related technologies are now quite mature, car manufacturers can simultaneously set up a platform center to receive the time, location, and overloading status of the vehicle. When the device detects overloading and locks the vehicle, it will broadcast the current locking status at regular intervals and inform the driver. When it detects that the overloading situation has been lifted, the vehicle will automatically unlock immediately. The locking technology communicates through CAN and locks the vehicle through CAN, which is more convenient and safer than traditional oil-electric locking.

[0005] The device is equipped with a large-capacity rechargeable polymer lithium battery. Even without an external main power supply, the internal battery can still work for a long time. By adopting relevant sleep strategies, the internal battery can also work for a longer time. The vehicle condition can be monitored in real time through the vibration sensor. When the vehicle is loaded with goods and generates continuous vibrations, the device can be awakened through the vibration sensor. By installing this device, overloading can be controlled at the source, which improves safety while protecting the interests of the car manufacturer. Since the load weight is calculated by the pressure sensor, the pressure sensor is the core component. Whether the pressure value given by the pressure sensor is accurate is related to the installation position, so the car manufacturer needs to obtain the best installation position through relevant tests, and different models must undergo relevant tests. Summary of the invention

[0006] The present application provides a method and system for intelligent detection and management of vehicle overload, which is used to solve the technical problem in the prior art that vehicle overload cannot be monitored and managed in a timely manner.

[0007] In view of the above problems, the present application provides a vehicle overweight intelligent detection and management method and system.

[0008] The first aspect of the present application provides a vehicle overweight intelligent detection and management method, the method is applied to a vehicle overweight intelligent detection and management system, the system includes a vehicle overweight intelligent detection and management device, the method includes: vehicle overweight intelligent detection and management method, the method is applied to a vehicle overweight intelligent detection and management system, the system includes a vehicle overweight intelligent detection and management device, the method includes: performing installation position testing and parameter calibration of pressure sensors and vibration sensors; waking up the device and detecting the load when the vehicle is loaded; maintaining communication between the device and the vehicle ECU and realizing the anti-dismantling function; and abnormal detection and processing of the pressure sensor.

[0009] The second aspect of the present application provides a vehicle overweight intelligent detection and management system, which includes: a power module, used to connect to the vehicle power supply and store power to power all modules of the system; a CAN communication module, which locks the vehicle through CAN communication; a GPS module, used to send and receive positioning information; a GSM module, used to send SMS text messages, voice calls, and GPRS data transmission; a pressure sensor, used to monitor the vehicle bearing pressure; a vibration sensor, used to monitor vehicle vibration; a voice broadcast module, used to issue voice broadcasts; and an MCU main control, used to store programs.

[0010] The third aspect of the present application provides a vehicle overweight intelligent detection and management device, wherein the pressure sensor includes: a signal amplification circuit, used to amplify the weak electrical signal output by the sensing element to an appropriate range; a filtering circuit, used to remove the noise and interference signal output by the sensing element to obtain an electrical signal; a linearization circuit, used to convert the nonlinear electrical signal output by the sensing element into a linear electrical signal; and an MCU, used to continuously collect the electrical information and frequently optimize the calculation to obtain an accurate pressure value.

[0011] One or more technical solutions provided in this application have at least the following technical effects or advantages: The embodiments of the present application perform installation position tests and parameter calibration of pressure sensors and vibration sensors; the device wakes up and detects the load when the vehicle is loaded; the device maintains communication with the vehicle ECU and implements an anti-dismantling function; and processes abnormal pressure sensor detection, combining load detection with vehicle locking technology, so that the vehicle can prevent overloading and keep the vehicle at a reasonable load, thereby reducing the related maintenance work of the vehicle factory and the related after-sales expenses of the vehicle factory. In addition, the vehicle is not overloaded, the vehicle stability is improved, and the safety of the owner is more guaranteed.

[0012] The above description is only an overview of the technical solution of the present application. In order to more clearly understand the technical means of the present application, it can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are listed below. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0014] Figure 1 This is the system architecture diagram provided for this application. DETAILED DESCRIPTION

[0015] The present application provides a method and system for intelligent detection and management of vehicle overload, which is used to solve the technical problem in the prior art that vehicle overload cannot be monitored and managed in a timely manner.

[0016] In response to the above technical problems, the overall idea of ​​the technical solution provided by this application is as follows: The embodiments of the present application perform installation position tests and parameter calibration of pressure sensors and vibration sensors; the device wakes up and detects the load when the vehicle is loaded; the device maintains communication with the vehicle ECU and implements an anti-dismantling function; and processes abnormal pressure sensor detection, combining load detection with vehicle locking technology, so that the vehicle can prevent overloading and keep the vehicle at a reasonable load, thereby reducing the related maintenance work of the vehicle factory and the related after-sales expenses of the vehicle factory. In addition, the vehicle is not overloaded, the vehicle stability is improved, and the safety of the owner is more guaranteed.

[0017] After introducing the basic principles of the present application, the technical solutions in the present application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all of the embodiments of the present application. It should be understood that the present application is not limited to the example embodiments described here. Based on the embodiments of the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present application. It should also be noted that, for the convenience of description, only the parts related to the present application are shown in the accompanying drawings, rather than all of them. Embodiment 1

[0018] like Figure 1 As shown, the present application provides a vehicle overweight intelligent detection and management method, the method is applied to a vehicle overweight intelligent detection and management system, the system includes a vehicle overweight intelligent detection and management device, the method includes:

[0019] S100: Perform installation position test and parameter calibration of pressure sensor and vibration sensor; The installation position test of the pressure sensor and the vibration sensor is the basic preparatory work for the entire vehicle overweight intelligent detection and management method. By testing the installation position and calibrating the parameters of the pressure sensor and the vibration sensor, the accuracy of the subsequent vehicle load detection and the normal operation of the equipment wake-up function are ensured.

[0020] Step S100 in the method provided in the embodiment of the present application includes: S110: Perform pressure sensor installation position test, compare data errors, obtain the best installation position and install it; S120: measuring the values ​​of the pressure sensor in the empty vehicle state and the verified maximum load state of different vehicle models respectively, and calibrating and saving them; S130: Calibrate and save the appropriate vibration wake-up value of the vibration sensor.

[0021] The installation position of the pressure sensor directly affects its measurement accuracy. Different positions may lead to different pressure perception due to differences in vehicle structure and load distribution. By testing at multiple candidate positions and comparing the errors between the measured data and the actual load, the position that can make the pressure sensor output closest to the actual load data can be determined as the best installation position. Exemplarily, pressure sensors are first temporarily installed at the front, middle, rear and near the suspension system of the frame. In the empty vehicle state, the initial data of the sensors at each position are recorded, and then standard weights are loaded in turn to simulate different loads. After multiple tests and comparisons, it is found that the error at the middle of the frame is the smallest under different loads, and it is determined as the best installation position. Finally, the pressure sensor is permanently installed in the middle of the frame.

[0022] Different vehicle models have different structures, deadweights, and load capacities, so the pressure sensor values ​​need to be calibrated for each model. The pressure sensor value in the empty vehicle state can be used as a reference value to determine whether the vehicle is loaded and whether the load is abnormal; the value in the maximum load state is used to determine the limit of overload. Calibrate and save these values ​​so that the equipment can accurately determine the vehicle load during operation.

[0023] The vibration sensor is used to wake up the device during the loading process to prevent the device from running continuously and consuming power when the vehicle is not loaded or stationary. Calibrating the appropriate vibration wake-up value can ensure that the device is awakened only when the vehicle generates a certain intensity of vibration during loading operations, while avoiding false awakening due to other minor vibrations.

[0024] S200: When the vehicle is loaded, the device wakes up and detects the load; During the vehicle loading process, the device is awakened from sleep mode to detect the vehicle load and take corresponding measures when the vehicle is overloaded, thus achieving real-time monitoring and management of the vehicle load and ensuring vehicle driving safety and transportation specifications.

[0025] Step S200 in the method provided in the embodiment of the present application includes: S210: When the vehicle stops loading and the main power is disconnected, the device switches to the internal battery and enters a dormant state waiting for vibration wake-up; S220: The vehicle is vibrating when loading, and the device is awakened by the vibration sensor to enter normal operation and turn on the power of each module; S230: The MCU module reads the pressure sensor value in real time and compares it with the maximum load pressure data value calibrated at the factory. If the pressure sensor value is greater than the calibrated maximum load pressure value, it is determined to be overloaded; S240: The device packages the overload data such as the time location information and the pressure sensor value collected by the GPS module, and sends it to the vehicle factory platform via the GSM module in GPRS mode; S250: The device detects overload and starts CAN lock. It also continuously broadcasts the overload lock status by voice, informing the driver that the vehicle will be unlocked synchronously after the overload is removed.

[0026] When the vehicle stops loading and the main power is disconnected, the device needs to rely on the internal battery to maintain basic operation and enter a low-power sleep state to save power. At this time, the device's power management module will automatically detect the main power disconnection signal, trigger a switching action, and switch the power supply source from the vehicle's main power to the internal battery. At the same time, the device enters sleep mode. In addition to maintaining the minimum power supply to the vibration sensor to monitor the vibration signal, other non-essential modules stop running, waiting for the vibration sensor to detect the vibration generated by the vehicle loading and wake up the device.

[0027] The handling and placement of goods will cause the vehicle to vibrate. The vibration sensor can keenly sense this vibration and convert the vibration signal into an electrical signal and transmit it to the main control chip of the device. After receiving the vibration signal, the main control chip determines whether its intensity and frequency meet the preset wake-up conditions. If so, it is considered that the vehicle is loading and the equipment needs to enter normal working state. At this time, the main control chip will send instructions to the power management module to turn on the power of each module that was previously in a dormant state, preparing for subsequent load detection and data transmission.

[0028] As the core control module of the device, the MCU will read the pressure value data collected by the pressure sensor in real time at a certain frequency after the device enters the normal working state. The pressure sensor is installed in a specific position of the vehicle and can convert the pressure generated by the vehicle load into an electrical signal. The MCU converts the electrical signal into a digital pressure value through the built-in analog-to-digital converter (ADC). Then, the MCU compares the real-time pressure value obtained with the maximum load pressure data value calibrated when the vehicle leaves the factory. If the real-time pressure value exceeds the calibrated maximum load pressure value, according to the pre-set judgment logic, it can be determined that the vehicle is in an overloaded state.

[0029] When a vehicle is judged to be overloaded, the device needs to send the relevant overload information to the vehicle manufacturer platform in a timely manner so that the vehicle manufacturer can record, count and manage the overload situation. The device first obtains the current time and vehicle location information from the GPS module, which can accurately reflect the time and location of the overload event. At the same time, the current overload pressure value measured by the pressure sensor is obtained and these data are integrated into a data packet. Then, the device uses the GPRS (General Packet Radio Service) function of the GSM module to send the data packet to the pre-set vehicle manufacturer platform server address.

[0030] In order to prevent overloaded vehicles from continuing to drive and ensure road safety, the device will immediately activate the CAN lock mechanism after determining the overload, limiting some functions of the vehicle. At the same time, the voice broadcast module will send a voice prompt to the driver to inform him that the vehicle is in an overload lock state and relevant precautions. When the vehicle load returns to normal, that is, the pressure sensor value is less than or equal to the calibrated maximum load pressure value, the device will automatically release the lock restriction and restore the vehicle to normal operation.

[0031] S300: The device maintains communication with the vehicle ECU and implements the anti-tampering function; Step S300 in the method provided in the embodiment of the present application includes: S310: When the vehicle is in ignition state, the device maintains communication with the vehicle ECU through heartbeat data; S320: If the vehicle ECU cannot receive the heartbeat data sent by the device, it will automatically lock the vehicle and display the reason for locking the vehicle and the information for contacting the maintenance personnel of the vehicle factory on the vehicle display screen.

[0032] When the vehicle is ignited and the vehicle electrical system starts to be powered, it is critical for the device to establish a communication connection with the vehicle ECU. Heartbeat data is a periodically sent signal, similar to the signal sent by the device to the ECU, used to indicate that the device is operating normally and the connection is stable. By regularly sending and receiving heartbeat data, both parties can monitor the status of the communication link in real time to ensure the timeliness and accuracy of information exchange.

[0033] If the vehicle ECU does not receive the heartbeat data sent by the device within the preset time period, this indicates that the device may be faulty, removed, or the communication link is interrupted. In order to ensure vehicle safety and transportation specifications, the vehicle ECU will automatically start the vehicle lock program to limit some functions of the vehicle and prevent the vehicle from continuing to drive when the device is abnormal. At the same time, the vehicle display screen will show the clear reason for locking the vehicle and the contact information of the maintenance personnel of the depot, so that the driver can understand the situation in time and seek solutions.

[0034] S400: pressure sensor abnormality detection processing; The sub-steps included in this step ensure that the pressure sensor is always in normal working condition during vehicle operation, and promptly detect and handle possible abnormal situations of the pressure sensor, such as being unplugged or moved, to ensure the accuracy and reliability of vehicle load detection, and at the same time promptly feedback abnormal information to relevant personnel and systems for processing.

[0035] Step S400 in the method provided in the embodiment of the present application includes: S410: Setting a detection interval; S420: When the device is working, if no pressure sensor data is received within the detection interval, it is determined that the pressure sensor is unplugged, and a vehicle lock command is sent and relevant information is broadcasted by voice; S430: When the device detects that the pressure sensor value when the vehicle is empty is too different from the factory calibrated empty value, it is determined that the pressure sensor has been moved, and a vehicle lock command is sent and voice broadcast; S440: The device sends the abnormal status information of the pressure sensor via CAN, which is displayed synchronously on the instrument. At the same time, the abnormal information and the time and place of occurrence are sent to the platform via GPRS.

[0036] The detection interval is the time period used by the device to regularly check the pressure sensor data reception and the rationality of the value. Reasonable setting of the detection interval can detect abnormalities in a timely manner while avoiding unnecessary consumption of equipment resources due to excessively frequent detection. The interval time can be adjusted according to the vehicle operation characteristics and actual needs, generally in seconds, for example, set to 10 seconds. In each detection interval, the device will perform operations in sequence to determine whether the pressure sensor is working properly.

[0037] If the device does not receive data from the pressure sensor within the set detection interval, it sends a lock command to the vehicle's CAN bus. When the vehicle is in an empty state, the pressure value measured by the pressure sensor should be close to the empty pressure value calibrated when the vehicle leaves the factory. If the actual measured value differs too much from the calibrated value, this may be due to the movement of the installation position of the pressure sensor, resulting in inaccurate pressure data measured, which affects the judgment of the vehicle load. In order to ensure the accuracy of load detection, the device will determine that the position of the pressure sensor is abnormal in this case and take corresponding measures. Send a lock command to the CAN bus to restrict vehicle operation, and at the same time, use the voice broadcast module to inform the occupants of the abnormal position of the pressure sensor so that they can handle it in time.

[0038] When an abnormality is detected in the pressure sensor, in addition to locking the vehicle and voice broadcasting, the device also needs to promptly transmit the abnormal status information to the vehicle instrument system and the depot platform. The abnormal information is sent to the vehicle instrument through the CAN bus, so that the driver can intuitively see the sensor abnormality prompt on the dashboard and further understand the vehicle status. At the same time, the GPRS function of the GSM module is used to send the abnormal information to the depot platform, so that the depot management personnel can timely grasp the vehicle equipment status, conduct remote monitoring and subsequent processing arrangements. Embodiment 2

[0039] Based on the same inventive concept as the vehicle overweight intelligent detection management method in the aforementioned embodiment, the present application provides a vehicle overweight intelligent detection management system, wherein the vehicle overweight intelligent detection management system includes: The power module is used to connect to the vehicle power supply and store power to supply power to all modules of the system; CAN communication module, locks the vehicle through CAN communication; GPS module, used to send and receive positioning information; GSM module, used for sending SMS messages, voice calls, and GPRS data transmission; Pressure sensor, used to monitor vehicle bearing pressure; shock sensors, which monitor vehicle vibrations; Voice broadcast module, used to issue voice broadcast; The MCU main control is used to store programs. When the program is executed, the system executes the steps of the vehicle overweight intelligent detection and management method. Embodiment 3

[0040] Based on the same inventive concept as the vehicle overweight intelligent detection and management method in the aforementioned embodiment, the present application also provides a vehicle overweight intelligent detection and management device, wherein the pressure sensor comprises: The signal amplification circuit is used to amplify the weak electrical signal output by the sensing element to a suitable range; A filter circuit is used to remove noise and interference signals output by the sensing element to obtain an electrical signal; A linearization circuit, used for converting the nonlinear electrical signal output by the inductive element into a linear electrical signal; MCU is used to continuously collect the electrical information and frequently optimize the calculation to obtain the accurate pressure value.

[0041] Those skilled in the art will understand that the various digital numbers such as the first and second involved in this application are only for the convenience of description, and are not used to limit the scope of this application, nor do they indicate a sequence of precedence. "And / or" describes the association relationship of associated objects, indicating that three relationships may exist. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. The character " / " generally indicates that the objects associated with each other are in an "or" relationship. "At least one" refers to one or more. At least two refers to two or more. "At least one", "any one" or similar expressions refer to any combination of these items, including any combination of single items (individuals) or plural items (individuals). For example, at least one item (individual, kind) of a, b, or c can represent: a, b, c, ab, ac, bc, or abc, where a, b, c can be single or multiple.

[0042] In the above embodiments, all or part of the embodiments may be implemented by software, hardware, firmware, or any combination thereof. When implemented by software, all or part of the embodiments may be implemented in the form of a computer program product. The computer program product includes one or more computer instructions. When the computer program instructions are loaded and executed on a computer, the process or function described in the present application is generated in whole or in part. The computer may be a general-purpose computer, a special-purpose computer, a computer network, or other programmable device. The computer instructions The instructions may be stored in a computer-readable storage medium, or transmitted from one computer-readable storage medium to another computer-readable storage medium. For example, the computer instructions may be transmitted from one website, computer, server or data center to another website, computer, server or data center by wired (e.g., coaxial cable, optical fiber, digital subscriber line (DSL)) or wireless (e.g., infrared, wireless, microwave, etc.) means. The computer-readable storage medium may be any available medium that can be accessed by a computer or a data storage device such as a server or data center that includes one or more available media integrated therein. The available medium may be a magnetic medium (e.g., a floppy disk, a hard disk, a magnetic tape), an optical medium (e.g., a DVD), or a semiconductor medium (e.g., a solid state drive (SSD)).

[0043] The various illustrative logic units and circuits described in this application can be implemented or operated by a general-purpose processor, a digital signal processor, an application-specific integrated circuit (ASIC), a field programmable gate array (FPGA) or other programmable logic device, discrete gate or transistor logic, discrete hardware components, or any combination of the above. The general-purpose processor can be a microprocessor, and optionally, the general-purpose processor can also be any conventional processor, controller, microcontroller or state machine. The processor can also be implemented by a combination of computing devices, such as a digital signal processor and a microprocessor, a plurality of microprocessors, one or more microprocessors in conjunction with a digital signal processor core, or any other similar configuration.

[0044] The steps of the method or algorithm described in this application can be directly embedded in hardware, software units executed by a processor, or a combination of the two. The software unit can be stored in RAM memory, flash memory, ROM memory, EPROM memory, EEPROM memory, register, hard disk, removable disk, CD-ROM or any other form of storage medium in the art. Exemplarily, the storage medium can be connected to the processor so that the processor can read information from the storage medium and write information to the storage medium. Optionally, the storage medium can also be integrated into the processor. The processor and the storage medium can be arranged in an ASIC, and the ASIC can be arranged in a terminal. Optionally, the processor and the storage medium can also be arranged in different components in the terminal. These computer program instructions can also be loaded onto a computer or other programmable data processing device so that a series of operating steps are performed on the computer or other programmable device to produce a computer-implemented process, so that the instructions executed on the computer or other programmable device provide for implementing the process in the process. Figure 1 A process or multiple processes and / or boxes Figure 1 The steps for the functions specified in one or more boxes.

[0045] Although the present application has been described in conjunction with specific features and embodiments thereof, it is obvious that various modifications and combinations may be made thereto without departing from the spirit and scope of the present application. Accordingly, this specification and the accompanying drawings are merely exemplary illustrations of the present application and are deemed to have covered any and all modifications, variations, combinations or equivalents within the scope of the present application. Obviously, a person skilled in the art may make various modifications and variations to the present application without departing from the scope of the present application. Thus, if these modifications and variations of the present application fall within the scope of the present application and its equivalents, the present application is intended to include these modifications and variations.

Claims

1. A vehicle overweight intelligent detection and management method, characterized in that: The method is applied to a vehicle overweight intelligent detection and management system, the system includes a vehicle overweight intelligent detection and management device, and the method includes: Conduct installation position test and parameter calibration of pressure sensors and vibration sensors; When the vehicle is loaded, the device wakes up and detects the load; The device maintains communication with the vehicle ECU and realizes the anti-tampering function; Pressure sensor abnormality detection and processing.

2. The vehicle overweight intelligent detection and management method according to claim 1 is characterized in that: The installation position test and parameter calibration of the pressure sensor and the vibration sensor include: Test the installation position of the pressure sensor, compare the data error, obtain the best installation position and install it; Measure the values ​​of the pressure sensors of different vehicle models in the empty vehicle state and the verified maximum load state, and calibrate and save them; Calibrate the appropriate vibration wake-up value of the vibration sensor and save it.

3. The vehicle overweight intelligent detection and management method according to claim 1 is characterized in that: When the vehicle is loaded with cargo, the device wakes up and detects the load, including: When the vehicle stops loading and the main power is disconnected, the device switches to the internal battery and enters a dormant state waiting to be awakened by vibration; The vehicle is vibrating when loading, and the device wakes up through the vibration sensor to enter normal operation and turn on the power of each module; The MCU module reads the pressure sensor value in real time and compares it with the factory-calibrated maximum load pressure data value. If the pressure sensor value is greater than the calibrated maximum load pressure value, it is determined to be overloaded; The device packages the time location information and pressure sensor values ​​collected from the GPS module and other overload data, and sends them to the vehicle manufacturer platform via GPRS through the GSM module; When the device detects an overload, it activates the CAN lock and continuously announces the overload lock status by voice, informing the driver that the vehicle will be unlocked synchronously after the overload is removed.

4. The vehicle overweight intelligent detection and management method according to claim 1 is characterized in that: The device maintains communication with the vehicle ECU and implements anti-tampering functions, including: When the vehicle is in ignition state, the device maintains communication with the vehicle ECU through heartbeat data; If the vehicle ECU cannot receive the heartbeat data sent by the device, it will automatically lock the vehicle and display the reason for locking the vehicle and the information to contact the maintenance personnel of the vehicle manufacturer on the vehicle display screen.

5. The vehicle overweight intelligent detection and management method according to claim 1 is characterized in that: The pressure sensor abnormality detection process includes: Set the detection interval; When the device is working, if no pressure sensor data is received within the detection interval, it is determined that the pressure sensor is unplugged, and a lock command is sent and relevant information is broadcasted by voice; When the device detects that the pressure sensor value when the vehicle is empty is too different from the factory calibrated empty value, it determines that the pressure sensor has been moved, sends a vehicle lock command and announces it by voice; The equipment sends the abnormal status information of the pressure sensor via CAN, which is displayed synchronously on the instrument. At the same time, the abnormal information and the time and place of occurrence are sent to the platform via GPRS.

6. A vehicle overweight intelligent detection and management system, characterized in that: The system comprises: The power module is used to connect to the vehicle power supply and store power to supply power to all modules of the system; CAN communication module, locks the vehicle through CAN communication; GPS module, used to send and receive positioning information; GSM module, used for sending SMS messages, voice calls, and GPRS data transmission; Pressure sensor, used to monitor vehicle bearing pressure; shock sensors, which monitor vehicle vibrations; Voice broadcast module, used to issue voice broadcast; The MCU main control is used to store a program, and when the program is executed, the system executes the steps of the method as claimed in any one of claims 1 to 5.

7. The vehicle overweight intelligent detection and management system according to claim 6, characterized in that: The pressure sensor comprises: The signal amplification circuit is used to amplify the weak electrical signal output by the sensing element to a suitable range; A filter circuit is used to remove noise and interference signals output by the sensing element to obtain an electrical signal; A linearization circuit, used for converting the nonlinear electrical signal output by the inductive element into a linear electrical signal; MCU is used to continuously collect the electrical information and frequently optimize the calculation to obtain the accurate pressure value.

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