Vehicle-mounted distress system based on bluetooth communication and low-speed vehicle in field

Abstract

This invention provides a vehicle-mounted emergency call system based on Bluetooth communication and a low-speed vehicle for on-site use. The system includes a trigger module, a Bluetooth communication module, a control module, and an independent power supply module. The trigger module generates an SOS trigger signal in response to user actions or abnormal vehicle status information. The Bluetooth communication module is connected to the trigger module and establishes a Bluetooth wireless connection with the user's mobile terminal. The control module is connected to both the trigger module and the Bluetooth communication module and, upon receiving the SOS trigger signal, controls the Bluetooth communication module to initiate an emergency call via the mobile terminal. The independent power supply module is connected to the trigger module, Bluetooth communication module, and control module to continuously provide power to these components. This system eliminates the need for a 4G or 5G cellular communication module in the vehicle, relying instead on the mobile terminal's own cellular network capabilities to complete the emergency call, significantly reducing costs.

Description

Technical Field

[0001] This invention relates to the field of vehicle safety technology, and in particular to a vehicle-mounted emergency call system based on Bluetooth communication and a low-speed vehicle in the field. Background Technology

[0002] Currently, low-speed park shuttle buses, scenic area sightseeing vehicles, golf carts, and other low-speed vehicles are widely used in enclosed scenarios such as park tours, scenic area shuttles, and golf course commuting. With the gradual upgrading of vehicle safety and intelligent safety features, these low-speed vehicles are generally required to be equipped with an emergency SOS function. This allows for rapid external assistance in emergency scenarios such as vehicle malfunctions, abnormal vehicle posture, injuries to passengers, and unexpected accidents, greatly improving the operational safety and emergency rescue efficiency of vehicles within the park.

[0003] Existing conventional vehicle-mounted SOS emergency assistance solutions mainly rely on vehicle-mounted cellular communication modules (4G / 5G) or dedicated vehicle-mounted telephone systems to achieve emergency communication.

[0004] However, for low-end, low-speed vehicles such as park shuttles, sightseeing vehicles, and golf carts, the cost of the entire vehicle, assembly positioning, and bulk selling price are limited, and communication hardware configurations such as onboard 4G / 5G cellular communication modules, T-BOX remote terminals, and in-vehicle telephones are generally omitted. Therefore, traditional SOS technology solutions that rely on in-vehicle networks cannot be implemented in low-end, low-speed vehicles, resulting in common safety shortcomings such as the lack of effective emergency rescue methods, the inability to automatically call for help in accidents, and the inability to actively alarm when people are disabled.

[0005] Therefore, it is necessary to provide a novel vehicle-mounted emergency call system based on Bluetooth communication and a low-speed vehicle for on-site use to solve the aforementioned problems in the existing technology. Summary of the Invention

[0006] The purpose of this invention is to provide a vehicle-mounted emergency call system based on Bluetooth communication and a low-speed vehicle in the field, so as to solve the above-mentioned technical problems.

[0007] To achieve the above objectives, the Bluetooth-based vehicle emergency call system of the present invention is applied to low-speed vehicles within a parking lot, and includes: The trigger module is used to generate an SOS trigger signal in response to user actions or abnormal vehicle status information. A Bluetooth communication module, connected to the triggering module, is used to establish a Bluetooth wireless connection with the user's mobile terminal; The control module, connected to both the trigger module and the Bluetooth communication module, is used to control the Bluetooth communication module to initiate an emergency call via the mobile terminal after receiving the SOS trigger signal; and... An independent power supply module is connected to the trigger module, the Bluetooth communication module, and the control module respectively, and is used to continuously provide power to the trigger module, the Bluetooth communication module, and the control module.

[0008] Optionally, the Bluetooth-based vehicle emergency call system further includes a configuration module connected to the control module. The configuration module is used for users to enter at least one contact number and set a corresponding call priority for each contact number. After the control module receives the SOS trigger signal, the control module obtains the contact number from the configuration module and, according to the call priority, controls the Bluetooth communication module to dial the corresponding contact number through the mobile terminal to initiate an emergency call.

[0009] Optionally, the Bluetooth-based vehicle emergency call system further includes a timing module connected to the control module. The timing module has a pre-stored dialing time threshold. The timing module is used to record the dialing time when the control module controls the Bluetooth communication module to dial the corresponding contact number through the mobile terminal, and compares the dialing time with the dialing time threshold. If the dialing time exceeds the dialing time threshold, the control module controls the Bluetooth communication module to dial the contact number corresponding to the next call priority through the mobile terminal to re-initiate the emergency call.

[0010] Optionally, the vehicle-mounted emergency call system based on Bluetooth communication further includes a Bluetooth signal strength analysis module. The Bluetooth signal strength analysis module is connected to both the Bluetooth communication module and the control module. The Bluetooth communication module is also used to detect the Bluetooth signal strength between itself and the mobile terminal in real time. The Bluetooth signal strength analysis module has a pre-stored Bluetooth signal strength threshold, which is used to compare the Bluetooth signal strength with the Bluetooth signal strength threshold. When the Bluetooth signal strength is less than the Bluetooth signal strength threshold, an alert message is issued. When the control module receives the SOS trigger signal, the Bluetooth signal strength analysis module controls the Bluetooth communication module to disconnect the current Bluetooth wireless connection, scan for nearby mobile terminals and send Bluetooth connection requests. After the nearby mobile terminals confirm the connection, a new Bluetooth wireless connection is established.

[0011] Optionally, the vehicle emergency call system based on Bluetooth communication further includes a vehicle startup information acquisition module. The vehicle startup information acquisition module is connected to the Bluetooth communication module and is used to acquire the vehicle's startup status. If the vehicle is determined to be started, the Bluetooth communication module is driven to establish a Bluetooth wireless connection with a preset user's mobile terminal. If a Bluetooth wireless connection cannot be established with the preset user's mobile terminal, the Bluetooth communication module is controlled to scan for nearby mobile terminals and send a Bluetooth connection request. After the nearby mobile terminals confirm the connection, a Bluetooth wireless connection is established.

[0012] Optionally, the Bluetooth-based vehicle emergency system further includes a vehicle status acquisition module for acquiring vehicle status information. The status information includes at least one of vehicle component status information and vehicle attitude information. The vehicle component status information includes at least one of battery status information, motor status information, vehicle steering status information, and vehicle braking status information. The vehicle attitude information includes at least one of vehicle tilt information and vehicle emergency braking information.

[0013] Optionally, the Bluetooth-based vehicle emergency system further includes a vehicle status analysis module, which is connected to the trigger module and the vehicle status acquisition module. The vehicle status analysis module is used to analyze the vehicle's status information according to preset status information to determine whether to send the vehicle status abnormality information to the trigger module. When sending the vehicle status abnormality information to the trigger module, the module determines the type of the vehicle status abnormality information based on the vehicle's status information.

[0014] Optionally, the Bluetooth-based vehicle emergency call system further includes a cellular signal detection module, a cellular signal analysis module, and a cross-vehicle Bluetooth communication module. The cellular signal detection module is connected to the cellular signal analysis module, and both the cross-vehicle Bluetooth communication module and the cellular signal analysis module are connected to the control module. The cellular signal detection module is used to detect the cellular signal strength in its vicinity. The cellular signal analysis module has a pre-stored cellular signal strength threshold, which is used to compare the cellular signal strength with the cellular signal strength threshold. When the cellular signal strength is less than the cellular signal strength threshold, the control module controls the cross-vehicle Bluetooth communication module to establish a Bluetooth wireless connection with cross-vehicle Bluetooth communication modules in other vehicles, and controls the Bluetooth communication modules in other vehicles to initiate an emergency call through the connected mobile terminal via the control module in the other vehicles.

[0015] Optionally, the vehicle-mounted emergency call system based on Bluetooth communication further includes a power control module. The power control module is connected to both the independent power module and the vehicle power supply. The power control module is used to monitor the remaining power of the independent power module in real time. When the power of the independent power module is detected to be lower than a preset power threshold, the power control module controls the vehicle power supply to replenish the power of the independent power module, so that the independent power module remains powered.

[0016] The present invention also provides a low-speed vehicle for use in a field, including an on-board power supply and any of the above-mentioned on-board emergency call systems based on Bluetooth communication.

[0017] The beneficial effects of this invention are as follows: (1) The independent power supply module is completely independent of the vehicle's drive power supply and does not rely on the vehicle's power supply for power. It can independently and continuously provide working power to the trigger module, Bluetooth communication module and control module, and is not affected by the vehicle's drive power supply being switched on or off, faults, line damage, or the vehicle being powered off. Under extreme conditions such as vehicle shutdown, vehicle power failure, or main power failure caused by an accident, the entire emergency rescue system can still be guaranteed to standby and work normally, completely solving the technical defects of traditional vehicle-mounted SOS functions that rely on the vehicle's power supply and fail directly after an accident power failure, greatly improving the fault tolerance and adaptability of the emergency rescue function.

[0018] (2) The trigger module can respond to the driver's manual operation or abnormal vehicle status information, generate an SOS trigger signal, realize the dual trigger mode of manual active rescue and automatic rescue of vehicle abnormality, and cover a variety of emergency scenarios such as human distress, vehicle failure, and vehicle posture imbalance.

[0019] (3) The Bluetooth communication module can establish a Bluetooth wireless connection with the user's mobile terminal. There is no need for the vehicle to be equipped with a 4G or 5G cellular communication module or vehicle telephone equipment. Emergency calls can be made by relying on the cellular network capabilities of the mobile terminal itself, which greatly reduces the safety configuration cost of low-speed vehicles in the park such as low-speed park roaming vehicles, sightseeing vehicles, and golf carts. Attached Figure Description

[0020] Figure 1 This is a structural block diagram of a vehicle-mounted emergency call system based on Bluetooth communication in some embodiments of the present invention. Detailed Implementation

[0021] To make the objectives, technical solutions, and advantages of this invention clearer, the technical solutions in the embodiments of this invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this invention. All other embodiments obtained by those skilled in the art based on the embodiments of this invention without inventive effort are within the scope of protection of this invention. Unless otherwise defined, the technical or scientific terms used herein should have the ordinary meaning understood by those skilled in the art. The terms "comprising" and similar expressions used herein mean that the element or object preceding the word covers the element or object listed following the word and its equivalents, but do not exclude other elements or objects.

[0022] To address the problems existing in the prior art, embodiments of the present invention provide a low-speed vehicle for use within a venue, such as a low-speed park shuttle, scenic area sightseeing vehicle, or golf cart. This low-speed vehicle includes conventional structures such as an onboard power supply for the vehicle's power system. Existing similar low-speed vehicles for use within venues are generally not equipped with onboard cellular communication devices due to cost constraints, making it difficult to achieve automatic emergency assistance. The low-speed vehicle for use in this embodiment is equipped with an onboard emergency call system based on Bluetooth communication. It uses Bluetooth to cooperate with the mobile terminals of drivers and passengers to complete emergency calls, eliminating the need for an onboard network module and enabling functions such as proactive emergency calls and automatic emergency calls in case of vehicle malfunctions at a lower cost.

[0023] All low-speed vehicles in this application are equipped with a mature vehicle condition monitoring system, which includes conventional on-board monitoring modules such as BMS battery management detection unit, motor controller condition monitoring unit, steering angle and steering fault monitoring unit, braking condition fault monitoring unit, and IMU inertial attitude detection unit. Each module is a conventional technology in the field of low-speed electric vehicles.

[0024] The Battery Management System (BMS) is a standard monitoring unit for low-speed vehicles. It primarily uses voltage acquisition circuits, current sampling resistors, and temperature acquisition probes to collect parameters such as individual cell voltages, total voltage, charging and discharging currents, and battery temperature in real time. Internally, the BMS uses preset protection thresholds to determine whether the battery is experiencing faults such as overvoltage, undervoltage, overcurrent, high temperature, or abnormal leakage. When abnormal battery conditions are detected, corresponding battery status information is generated.

[0025] The motor controller status monitoring unit is integrated within the motor controller and is a core unit for vehicle power monitoring. It collects real-time operating parameters of the drive motor, such as three-phase current, motor speed, rotor position, and controller temperature, through Hall effect sampling circuits, phase current detection loops, and speed and position sensors. Based on these operating parameters, the motor controller determines whether faults such as motor stall, overload, phase loss, overheating, or drive abnormalities have occurred. Once a power system abnormality is detected, it immediately generates motor status information.

[0026] The steering angle and steering fault monitoring unit mainly consists of a steering angle sensor, a steering assist sampling circuit, and a signal processing unit. It collects signals such as steering wheel angle, steering return status, and steering assist current in real time to identify steering system faults such as steering sticking, steering failure, abnormal angle, and sensor malfunction. When the steering mechanism malfunctions, the steering angle and steering fault monitoring unit outputs vehicle steering status information.

[0027] The brake status fault monitoring unit relies on brake switch signals, brake pressure sensors, and brake pedal travel sensors to monitor the brake status. It identifies the brake pedal depressing status, brake circuit pressure changes, and brake switch on / off status in real time to determine whether the vehicle is experiencing conditions such as brake failure, brake sensor malfunction, or abnormal emergency braking. When abnormal braking or violent braking behavior is detected, it outputs the corresponding vehicle brake status information.

[0028] The IMU (Inertial Attitude Measurement Unit) consists of a three-axis accelerometer and a three-axis gyroscope, with some models integrating a magnetometer. It is typically installed at the center of the vehicle body to collect real-time dynamic attitude data and driving condition data. Vehicle tilt information and emergency braking information are accurately detected using this module.

[0029] The IMU (Inertial Attitude Detection Unit) collects the vehicle's roll and pitch angular velocities in real time using a gyroscope. Combined with the gravitational acceleration components collected by the accelerometer, the attitude calculation algorithm calculates the vehicle's real-time roll and pitch angles. It can accurately identify abnormal attitudes such as vehicle roll, pitching, and tilting imbalance. When the tilt angle or rate of change of tilt exceeds a preset safety threshold, it outputs vehicle tilt information.

[0030] The accelerometer of the IMU (Inertial Attitude Detection Unit) collects linear acceleration data of the vehicle's front and rear axes in real time. During normal driving, the vehicle's acceleration and deceleration fluctuate smoothly. When the vehicle undergoes emergency braking, it will generate instantaneous and large-amplitude negative acceleration. The module identifies this sudden acceleration signal and, in combination with a preset emergency braking judgment threshold, accurately captures the vehicle's emergency braking and violent deceleration conditions, and outputs the corresponding vehicle emergency braking information.

[0031] In some embodiments, reference is made to Figure 1 , Figure 1 The image shows low-speed vehicle 1 and low-speed vehicle 2 in the field, both of which are equipped with the same Bluetooth-based vehicle distress system.

[0032] In some embodiments, reference is made to Figure 1The Bluetooth-based vehicle emergency call system includes a trigger module, a Bluetooth communication module, a control module, and an independent power supply module. The trigger module generates an SOS trigger signal in response to user actions or abnormal vehicle status information. The Bluetooth communication module is connected to the trigger module and establishes a Bluetooth wireless connection with the user's mobile terminal. The control module is connected to both the trigger module and the Bluetooth communication module and, upon receiving the SOS trigger signal, controls the Bluetooth communication module to initiate an emergency call via the mobile terminal. The independent power supply module is connected to the trigger module, the Bluetooth communication module, and the control module to continuously provide power to these components.

[0033] In this application, the independent power module is completely independent of the vehicle's drive power supply and does not rely on the vehicle's power source for power. It can independently and continuously provide operating power to the trigger module, Bluetooth communication module, and control module, unaffected by the vehicle's drive power supply switching, failure, wiring damage, or vehicle power failure. Even under extreme conditions such as vehicle shutdown, vehicle power failure, or main power failure due to an accident, the entire emergency rescue system can still maintain normal standby and operation. This completely solves the technical defects of traditional vehicle-mounted SOS functions that rely on the vehicle's power source and fail directly after a power outage, greatly improving the fault tolerance and adaptability of the emergency rescue function.

[0034] The trigger module can respond to the driver's manual operation or abnormal vehicle status information, generate an SOS trigger signal, and realize dual triggering modes of manual distress and automatic distress in case of vehicle abnormality, covering a variety of emergency scenarios such as human distress, vehicle malfunction, and vehicle posture imbalance.

[0035] The Bluetooth communication module can establish a Bluetooth wireless connection with the user's mobile terminal, eliminating the need for the vehicle to be equipped with a 4G or 5G cellular communication module or a vehicle telephone. Emergency calls can be made by relying on the mobile terminal's own cellular network capabilities, which greatly reduces the safety configuration costs of low-speed park vehicles such as low-speed park roaming vehicles, sightseeing vehicles, and golf carts.

[0036] In some embodiments, the triggering module is a physical button or a touch screen button. The physical button can be located in a position in the driver's cab that is easy for the driver and passengers to touch, and the touch screen button is integrated into the vehicle touch display screen interface. The driver and passengers can output an SOS trigger signal by pressing the physical button or clicking the screen button to generate an SOS trigger signal.

[0037] In some embodiments, reference is made to Figure 1The Bluetooth-based vehicle emergency call system further includes a configuration module connected to the control module. The configuration module is used for users to input at least one contact number and set a corresponding call priority for each contact number. After the control module receives the SOS trigger signal, the control module obtains the contact number from the configuration module and, according to the call priority, controls the Bluetooth communication module to dial the corresponding contact number through the mobile terminal to initiate an emergency call and establish a call with the contact.

[0038] In some specific embodiments, the configuration module has a built-in data storage unit and parameter editing unit, supporting user-defined input, modification, and deletion of contact numbers. It also allows for flexible sorting and permission adjustment of the priority of input contact numbers; the higher the priority value, the higher the call order for the corresponding contact. The configuration module supports multi-level priority gradient division by default, distinguishing between primary emergency contacts, backup emergency contacts, and backup rescue contacts to adapt to different distress call needs. Simultaneously, the configuration module has data verification and storage protection functions, automatically identifying whether the input mobile phone number format is compliant, eliminating invalid and erroneous numbers, and persistently storing the input contact numbers and call priorities locally. Data is not lost after power failure or restart, eliminating the need for user reconfiguration. When an SOS distress call is triggered, the control module strictly executes the call logic according to the call priority order, prioritizing dialing the contact number with the highest call priority.

[0039] In some embodiments, reference is made to Figure 1 The Bluetooth-based vehicle emergency call system further includes a timing module connected to the control module. The timing module stores a dialing time threshold and records the dialing time when the control module controls the Bluetooth communication module to dial the corresponding contact number via the mobile terminal. The timing module compares the dialing time with the dialing time threshold. If the dialing time exceeds the threshold, the control module controls the Bluetooth communication module to dial the contact number corresponding to the next call priority via the mobile terminal to re-initiate the emergency call. The dialing time is defined as the duration from when the Bluetooth communication module controls the mobile terminal to initiate the dialing operation to the contact number until the call is established.

[0040] In some embodiments, the timing module is a system-embedded programmable timing unit adapted to the vehicle-mounted embedded control system architecture. It mainly comes in two deployment forms, selectable based on the system hardware solution. The first is a built-in software timing module, built upon the main control microcontroller and MCU embedded program of the control module. No additional independent hardware components are required. It accurately times the call using programmable timer functions and can flexibly customize dialing time thresholds such as 10s, 20s, and 30s, offering advantages such as low cost, high integration, and adjustable parameters. The second is an external independent hardware timing module, constructed using a vehicle-specific timing chip and high-precision timing circuit. It independently completes timing, time comparison, and signal feedback, offering higher timing accuracy, stronger resistance to vehicle voltage fluctuations and electromagnetic interference, and is suitable for high-precision emergency timing scenarios in complex vehicle electrical environments. This timing module synchronously monitors the emergency call dialing process throughout, collecting the dialing duration of each number in real time and continuously feeding back the timing comparison results to the control module. This provides accurate timing information for the system's logic of automatically switching priority contact numbers, ensuring the orderly and efficient execution of multi-level emergency call processes until the call is established.

[0041] In some embodiments, the dialing time threshold is 25s-35s. Specifically, the dialing time threshold is 25s, 27s, 30s, 33s, or 35s, or any value between any two of the aforementioned times.

[0042] In some embodiments, reference is made to Figure 1 The Bluetooth-based vehicle emergency call system further includes a Bluetooth signal strength analysis module, which is connected to both the Bluetooth communication module and the control module. The Bluetooth communication module is also used to detect the Bluetooth signal strength between itself and the mobile terminal in real time. The Bluetooth signal strength analysis module has a pre-stored Bluetooth signal strength threshold, which is used to compare the Bluetooth signal strength with the threshold. When the Bluetooth signal strength is less than the threshold, an alert message is issued. When the control module receives the SOS trigger signal, the Bluetooth signal strength analysis module controls the Bluetooth communication module to disconnect the current Bluetooth wireless connection, scan for nearby mobile terminals and send Bluetooth connection requests. After the nearby mobile terminals confirm the connection, a new Bluetooth wireless connection is established.

[0043] In some embodiments, the Bluetooth signal strength threshold is -78dBm to -82dBm. Specifically, the Bluetooth signal strength threshold is -78 dBm, -79 dBm, -80 dBm, -81 dBm, or -82 dBm, or any value between any two of the aforementioned values. This allows for precise adaptation to complex electromagnetic interference in vehicles, metal obstructions from the vehicle body, and spatial obstructions, effectively distinguishing between high-quality and weak Bluetooth communication links. When the Bluetooth signal strength is higher than the threshold, the Bluetooth link has a low packet loss rate and stable command transmission, reliably completing dialing control and voice communication interaction. When the Bluetooth signal strength drops below the threshold, Bluetooth data transmission latency increases, the packet loss rate rises significantly, SOS distress calls cannot be reliably made, and problems such as dialing failure and call interruption are highly likely. This avoids both frequent false alarms and unnecessary reconnections caused by setting the threshold too high, and prevents weak links from operating with defects due to setting the threshold too low. Under normal conditions, it can promptly alert users to degraded Bluetooth connection quality, thus mitigating the risk of SOS failure. In SOS emergency trigger scenarios, it can promptly determine that the current link is unavailable, proactively disconnect weak connections, and rescan and match mobile terminals with stronger signals to quickly rebuild a stable Bluetooth communication link. This greatly improves the dialing success rate and operational reliability of the vehicle emergency SOS system, ensuring the effective delivery of SOS information in emergency scenarios.

[0044] In some embodiments, reference is made to Figure 1 The vehicle emergency call system based on Bluetooth communication also includes a vehicle startup information acquisition module. The vehicle startup information acquisition module is connected to the Bluetooth communication module and is used to acquire the startup status of the vehicle. If the vehicle is determined to be started, the system drives the Bluetooth communication module to establish a Bluetooth wireless connection with the mobile terminal of a preset user. If a Bluetooth wireless connection cannot be established with the mobile terminal of the preset user, the system controls the Bluetooth communication module to scan for nearby mobile terminals and send a Bluetooth connection request. A Bluetooth wireless connection is established after the nearby mobile terminals confirm the connection.

[0045] By automatically triggering Bluetooth network connection upon recognizing the vehicle's startup status, the vehicle emergency call system achieves self-starting and proactive network connectivity upon power-on, requiring no manual user operation and demonstrating a high degree of intelligence. It prioritizes matching with preset users' mobile terminals, ensuring dedicated stability for daily connections. If a preset user's mobile terminal fails to connect, it automatically scans for and connects to nearby available mobile terminals, effectively resolving issues such as Bluetooth connection failure, signal loss, or device pairing failure after vehicle startup. This ensures that Bluetooth communication remains available throughout vehicle operation, providing a continuous and stable communication foundation for the reliable triggering of subsequent emergency SOS call functions.

[0046] In some embodiments, reference is made to Figure 1The Bluetooth-based vehicle emergency call system further includes a vehicle status acquisition module for acquiring vehicle status information. The status information includes at least one of vehicle component status information and vehicle attitude information. The vehicle component status information includes at least one of battery status information, motor status information, vehicle steering status information, and vehicle braking status information. The vehicle attitude information includes at least one of vehicle tilt information and vehicle emergency braking information.

[0047] In some embodiments, reference is made to Figure 1 The vehicle emergency call system based on Bluetooth communication also includes a vehicle status analysis module. The vehicle status analysis module is connected to the trigger module and the vehicle status acquisition module respectively. The vehicle status analysis module is used to analyze the vehicle status information according to preset status information to determine whether to send the vehicle status abnormality information to the trigger module. When sending the vehicle status abnormality information to the trigger module, the type of vehicle status abnormality information is determined according to the vehicle status information.

[0048] The vehicle status acquisition module is connected to conventional vehicle monitoring modules such as the BMS battery management detection unit, motor controller status monitoring unit, steering angle and steering fault monitoring unit, braking status fault monitoring unit, and IMU inertial attitude detection unit to acquire at least one of the following: battery status information, motor status information, vehicle steering status information, vehicle braking status information, vehicle tilt information, and vehicle emergency braking information.

[0049] By connecting to various onboard monitoring units, the system can comprehensively collect information on the operating status of vehicle components and the vehicle's attitude, enabling the detection of faults in key components such as the battery, motor, steering, and brakes, as well as dangerous conditions such as vehicle tilting and sudden braking. Based on multi-dimensional vehicle status data, the system can identify abnormal risk scenarios, providing a reliable basis for triggering SOS distress calls, avoiding unnecessary false triggers, and improving the intelligence and early warning accuracy of the onboard distress system.

[0050] It can determine the urgency level of an SOS distress call based on vehicle component status information and vehicle attitude information. For example, if the battery status information shows a low battery voltage, the SOS distress call is at the lowest urgency level; if the motor status information shows insufficient motor power, the SOS distress call is also at the lowest urgency level; if the vehicle tilt information shows a 30° tilt, the SOS distress call is at the medium urgency level; if the vehicle tilt information shows a 60° tilt, the SOS distress call is at the highest urgency level; and if the vehicle emergency braking information shows brake failure, the SOS distress call is at the highest urgency level.

[0051] In some embodiments, reference is made to Figure 1The Bluetooth-based vehicle emergency call system further includes a cellular signal detection module, a cellular signal analysis module, and a cross-vehicle Bluetooth communication module. The cellular signal detection module is connected to the cellular signal analysis module, and both the cross-vehicle Bluetooth communication module and the cellular signal analysis module are connected to the control module. The cellular signal detection module is used to detect the cellular signal strength in its vicinity. The cellular signal analysis module has a pre-stored cellular signal strength threshold, which is used to compare the cellular signal strength with the cellular signal strength threshold. When the cellular signal strength is less than the cellular signal strength threshold, the control module controls the cross-vehicle Bluetooth communication module to establish a Bluetooth wireless connection with cross-vehicle Bluetooth communication modules in other vehicles, and controls the Bluetooth communication modules in other vehicles to initiate an emergency call through the connected mobile terminal via the control module in the other vehicles.

[0052] The cellular signal detection module can detect the cellular signal strength of the vehicle's environment in real time, providing accurate data support for judging the system's network condition. The cellular signal analysis module compares and analyzes the real-time collected cellular signal strength through a built-in cellular signal strength threshold, accurately identifying severe communication scenarios such as weak cellular signals, network paralysis, and signal blind spots that prevent normal emergency calls. When it is determined that the local cellular signal does not meet the conditions for an emergency call, the cellular signal analysis module can actively trigger the cross-vehicle Bluetooth communication module to work, enabling the cross-vehicle Bluetooth communication module to actively search for and establish wireless Bluetooth communication connections with cross-vehicle Bluetooth communication modules in other nearby vehicles. Relying on the equipment resources of nearby normal vehicles, the emergency distress call is initiated on behalf of the vehicle through the control module, Bluetooth communication module, and its bound mobile terminal of the other vehicle. This invention, through the coordinated operation of a cellular signal detection module, a cellular signal analysis module, and a cross-vehicle Bluetooth communication module, overcomes the technical shortcomings of relying solely on the local cellular network and dialing via the mobile terminal. It effectively solves the problem of vehicles being unable to trigger SOS distress calls in certain scenarios with extremely poor cellular signal, greatly expands the applicable scenarios of the vehicle distress system, significantly improves the success rate and fault tolerance of vehicle emergency distress calls, and comprehensively ensures the reliability of distress calls under dangerous vehicle conditions.

[0053] In some embodiments, reference is made to Figure 1 The Bluetooth-based vehicle emergency call system also includes a power control module, which is connected to both the independent power module and the vehicle power supply. The power control module monitors the remaining power of the independent power module in real time. When the power of the independent power module is detected to be lower than a preset power threshold, the power control module controls the vehicle power supply to replenish the power of the independent power module, so that the independent power module remains powered.

[0054] The power control module can monitor the remaining power status of the independent power module in real time, enabling continuous data collection and accurate judgment of the remaining power. When the power control module detects that the remaining power of the independent power module is lower than a preset power threshold, it can actively control the vehicle power supply to replenish the power of the independent power module, ensuring that the independent power module always remains in an effective powered operating state. Through the coordinated operation of the power control module, the independent power module, and the vehicle power supply, the failure of the vehicle emergency system due to the independent power module running out of power can be avoided. This ensures that the vehicle emergency system still has a stable power supply capability under special conditions such as vehicle shutdown and power failure, effectively guaranteeing the 24 / 7 uninterrupted normal standby operation of the Bluetooth-based vehicle emergency system, significantly improving the overall system's operational stability and emergency rescue reliability.

[0055] While embodiments of the present invention have been described in detail above, it will be apparent to those skilled in the art that various modifications and variations can be made to these embodiments. However, it should be understood that such modifications and variations fall within the scope and spirit of the invention as set forth in the claims. Furthermore, the invention described herein may have other embodiments and can be implemented or carried out in various ways.

Claims

1. A vehicle-mounted emergency call system based on Bluetooth communication, applied to low-speed vehicles within a site, characterized in that, include: The trigger module is used to generate an SOS trigger signal in response to user actions or abnormal vehicle status information. A Bluetooth communication module, connected to the triggering module, is used to establish a Bluetooth wireless connection with the user's mobile terminal; The control module, connected to both the trigger module and the Bluetooth communication module, is used to control the Bluetooth communication module to initiate an emergency call via the mobile terminal after receiving the SOS trigger signal; and... An independent power supply module is connected to the trigger module, the Bluetooth communication module, and the control module respectively, and is used to continuously provide power to the trigger module, the Bluetooth communication module, and the control module.

2. The vehicle-mounted emergency call system based on Bluetooth communication according to claim 1, characterized in that, It also includes a configuration module, which is connected to the control module. The configuration module is used for users to enter at least one contact number and set a corresponding call priority for each contact number. After the control module receives the SOS trigger signal, the control module obtains the contact number from the configuration module and controls the Bluetooth communication module to dial the corresponding contact number through the mobile terminal to initiate an emergency call according to the call priority.

3. The vehicle-mounted emergency call system based on Bluetooth communication according to claim 2, characterized in that, It also includes a timing module, which is connected to the control module. The timing module has a pre-stored dialing time threshold. The timing module is used to record the dialing time when the control module controls the Bluetooth communication module to dial the corresponding contact number through the mobile terminal, and compares the dialing time with the dialing time threshold. If the dialing time exceeds the dialing time threshold, the control module controls the Bluetooth communication module to dial the contact number corresponding to the next call priority through the mobile terminal to re-initiate the emergency call.

4. The vehicle-mounted emergency call system based on Bluetooth communication according to claim 1, characterized in that, It also includes a Bluetooth signal strength analysis module, which is connected to both the Bluetooth communication module and the control module. The Bluetooth communication module is used to detect the Bluetooth signal strength between itself and the mobile terminal in real time. The Bluetooth signal strength analysis module has a pre-stored Bluetooth signal strength threshold, which is used to compare the Bluetooth signal strength with the threshold. When the Bluetooth signal strength is less than the threshold, an alert message is issued. When the control module receives the SOS trigger signal, the Bluetooth signal strength analysis module controls the Bluetooth communication module to disconnect the current Bluetooth wireless connection, scan for nearby mobile terminals and send Bluetooth connection requests. After the nearby mobile terminals confirm the connection, a new Bluetooth wireless connection is established.

5. The vehicle-mounted emergency call system based on Bluetooth communication according to claim 1, characterized in that, It also includes a vehicle startup information acquisition module, which is connected to the Bluetooth communication module and is used to acquire the vehicle's startup status. If the vehicle is determined to be started, the module drives the Bluetooth communication module to establish a Bluetooth wireless connection with a preset user's mobile terminal. If a Bluetooth wireless connection cannot be established with the preset user's mobile terminal, the module controls the Bluetooth communication module to scan for nearby mobile terminals and send Bluetooth connection requests. A Bluetooth wireless connection is established after the nearby mobile terminals confirm the connection.

6. The vehicle-mounted emergency call system based on Bluetooth communication according to claim 1, characterized in that, It also includes a vehicle status acquisition module for acquiring vehicle status information, which includes at least one of vehicle component status information and vehicle attitude information. The vehicle component status information includes at least one of battery status information, motor status information, vehicle steering status information, and vehicle braking status information. The vehicle attitude information includes at least one of vehicle tilt information and vehicle emergency braking information.

7. The vehicle-mounted emergency call system based on Bluetooth communication according to claim 6, characterized in that, It also includes a vehicle status analysis module, which is connected to the trigger module and the vehicle status acquisition module respectively. The vehicle status analysis module is used to analyze the vehicle status information according to preset status information to determine whether to send the vehicle status abnormal information to the trigger module. When sending the vehicle status abnormal information to the trigger module, the type of vehicle status abnormal information is determined according to the vehicle status information.

8. The vehicle-mounted emergency call system based on Bluetooth communication according to claim 1, characterized in that, It also includes a cellular signal detection module, a cellular signal analysis module, and a cross-vehicle Bluetooth communication module. The cellular signal detection module is connected to the cellular signal analysis module, and both the cross-vehicle Bluetooth communication module and the cellular signal analysis module are connected to the control module. The cellular signal detection module is used to detect the cellular signal strength in its vicinity. The cellular signal analysis module has a pre-stored cellular signal strength threshold, which is used to compare the cellular signal strength with the cellular signal strength threshold. When the cellular signal strength is less than the cellular signal strength threshold, the control module controls the cross-vehicle Bluetooth communication module to establish a Bluetooth wireless connection with cross-vehicle Bluetooth communication modules in other vehicles, and controls the Bluetooth communication modules in other vehicles to initiate an emergency call through the connected mobile terminal via the control module in the other vehicles.

9. The vehicle-mounted emergency call system based on Bluetooth communication according to claim 1, characterized in that, It also includes a power control module, which is connected to both the independent power module and the vehicle power supply. The power control module is used to monitor the remaining power of the independent power module in real time. When the power of the independent power module is detected to be lower than a preset power threshold, the power control module controls the vehicle power supply to replenish the power of the independent power module, so that the independent power module remains powered.

10. A low-speed vehicle for use within a venue, characterized in that, This includes vehicle power supplies and vehicle emergency call systems based on Bluetooth communication as described in any one of claims 1 to 9.

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