Electric convertible control system and method for large electric convertible passenger car

Abstract

The invention discloses an electric convertible control system and method for a large electric convertible passenger car, the system comprises an environment monitoring module, a user interaction module, a safety control module and a driving execution module which are electrically connected with a central control unit, and the environment monitoring module is used for collecting vehicle state information and surrounding environment data; the user interaction module provides man-machine interaction and feeds back vehicle dynamic states through multi-module control; the safety control module monitors and guarantees operation safety, and the central control unit processes data collected by the environment monitoring module and controls the driving execution module to drive the open tent mechanism to be unfolded or folded according to an operation instruction sent by the user interaction module. The system integrates various functions of environment perception, dynamic driving force adjustment, multi-mode safety protection, user interaction and the like, and the problems that a traditional convertible is poor in sealing performance, has potential safety hazards in operation and the like when running at a high speed and in a complex environment are effectively solved.

Description

Technical Field

[0001] The invention belongs to the technical field of convertible buses, and in particular relates to an electric convertible control system for a large electric convertible bus, and also relates to an electric convertible control method for the large electric convertible bus. Background Art

[0002] In existing convertible car technologies, the convertible top control method is relatively simple, mostly relying on manual operation by the driver or relying on a single sensor for judgment. This results in the following drawbacks in actual use of convertible cars:

[0003] 1. Poor adaptability to dynamic environments: The system fails to comprehensively consider key parameters such as vehicle speed and wind pressure to adjust the convertible's driving force in real time. When the vehicle is traveling at high speed, the convertible's sealing state cannot be adjusted according to changes in wind pressure, which can easily lead to air leakage and water seepage, seriously affecting the comfort of the vehicle's interior environment.

[0004] 2. Insufficient safety redundancy: There is a lack of dynamic obstacle avoidance and emergency self-locking functions. During the process of unfolding the convertible, if it encounters sudden obstacles, such as suddenly flying foreign objects, it cannot respond in time, which can easily cause damage to the convertible's mechanical structure and shorten its service life.

[0005] 3. Low level of intelligence: User interaction methods are limited, and multi-terminal interactive functions such as voice and APP remote control cannot be realized; at the same time, the vehicle does not have a status self-check function, making it difficult for the driver to understand the working status of the convertible system in real time, increasing potential safety risks. Summary of the Invention

[0006] The purpose of the present invention is to provide an electric convertible control system and method for a large electric convertible passenger car, so as to solve the problems faced by traditional convertible cars when driving at high speeds and in complex environments, such as poor sealing and potential safety hazards in operation.

[0007] The technical solution adopted by the present invention is that the electric convertible control system of a large electric convertible passenger bus includes an environmental monitoring module, a user interaction module, a safety control module and a drive execution module, which are respectively electrically connected to a central control unit. The environmental monitoring module is used to collect vehicle status information and surrounding environment data; the user interaction module provides human-computer interaction and feedback on vehicle dynamics through multi-module control; the safety control module monitors and ensures operational safety; the central control unit processes the data collected by the environmental monitoring module and controls the drive execution module to drive the convertible mechanism to expand or close according to the operating instructions issued by the user interaction module, and the status information of the convertible mechanism is fed back to the user interaction module.

[0008] Furthermore, the above-mentioned environmental monitoring module includes:

[0009] Wind speed sensor, installed at the front of the roof, with a range of 0-30m / s and an accuracy of ±0.5m / s, used to measure the wind speed around the vehicle;

[0010] Rain sensor, with a resolution of 0.01mm / min, is installed on the inside of the front windshield near the rearview mirror to detect whether and how much rainfall is expected;

[0011] Temperature and humidity sensors are installed in the cockpit near the air-conditioning vents to monitor the temperature and humidity inside and outside the vehicle;

[0012] 360° surround-view cameras with a resolution of 1280×720@30fps are located in the front, back, left, right, top, and center of the vehicle, enabling all-round visual monitoring of the vehicle's surroundings.

[0013] The laser radar is installed in the center of the roof with a detection range of 0.1-50m and is used to detect obstacles.

[0014] Furthermore, the above-mentioned central control unit adopts an automotive-grade MCU core chip. The chip integrates multiple judgment logics and adopts a data fusion algorithm based on Kalman filtering to process data collected by multiple sensors. It has speed limit, window linkage and air pressure difference compensation functions. The system is set to allow convertible operation only when the vehicle speed is ≤30km / h. Before the convertible operation, the window is automatically controlled to drop to a safe height, and the air pressure difference inside and outside the cockpit is dynamically calculated according to the vehicle speed, and the corresponding driving force curve is matched.

[0015] Furthermore, the drive execution module uses dual permanent magnet synchronous motors in conjunction with a planetary gear reducer to support seamless switching between the main and standby motors. The dual permanent magnet synchronous motors have a rated power of 2.5kW and a peak torque of 120N·m. During the closing phase, the sealing strip pressure is dynamically adjusted by a hydraulic cylinder, and elastic memory alloy materials are used to enhance airtightness.

[0016] Furthermore, the above-mentioned safety control module includes an emergency braking and self-test system. When the environmental monitoring module detects an obstacle invading the path, it triggers the motor's reverse torque and activates the sound and light alarm; when it is started for the first time each day, it automatically detects the motor winding impedance, guide rail wear and sensor calibration status, and generates a health report that is pushed to the user end.

[0017] Furthermore, the above-mentioned user interaction module is multi-modally controlled through the in-vehicle touch screen, mobile phone APP and voice commands. The in-vehicle touch screen UI interface displays the convertible opening and closing progress in real time, the mobile phone APP supports remote appointment of opening and closing, and the voice commands are compatible with Chinese and English wake-up words; the convertible status is prompted through HUD projection.

[0018] The electric convertible top control method of a large electric convertible bus comprises the following steps:

[0019] Pre-action condition verification: After the system is powered on, the safety control module verifies the motor, sensors, and communication circuits. After the user triggers the open-top command, the system collects vehicle speed and environmental data. When the vehicle speed is ≤30 km / h, there is no rain or snow, the wind speed is <10 m / s, the temperature is between 20°C and 60°C, and there are no obstacles, the system proceeds to the next step.

[0020] Dynamic opening and closing control: During the deployment phase, the windows automatically drop 20cm, unlocking the convertible cover. The electromagnetic lock release time is ≤ 0.3s. The dual motors adjust their speed in stages, and the lidar scans the path in real time. When an obstacle is detected, the system pauses and alerts the user. During the closing phase, the hydraulic system dynamically increases pressure based on vehicle speed, activating the drainage channel after closing, with a slope of 3°.

[0021] Exception handling mechanism: When a motor is overloaded, the system switches to a backup motor and records the fault code. When communication is interrupted, the system enables local cache control logic. For different fault codes, the system provides fault descriptions, fault mode indications, possible causes, and solutions.

[0022] Furthermore, in the dual motor stage speed regulation, the initial low speed is 0.2m / s, the uniform speed stage is 0.5m / s, and the final deceleration is 0.1m / s; the hydraulic system is in the closing stage according to the sealing strip pressure formula P = kv 2 +b adjusts the pressure; where k = 0.05bar 2 / m 2 , b = 10 bar, v is the vehicle speed.

[0023] Compared with the prior art, the present invention has the following beneficial effects:

[0024] 1. Multi-sensor fusion decision-making: By fusing environmental data with vehicle status information, the system can dynamically determine the conditions for opening and closing the convertible top, significantly improving operational safety and reliability.

[0025] 2. Adaptive Sealing Technology: Automatically adjusts the hood closing pressure based on vehicle speed, effectively solving water seepage and air leakage problems caused by high-speed wind pressure and improving interior comfort.

[0026] 3. Redundant drive design: The combination of dual motors and manual emergency devices ensures that the system can work normally under various circumstances, thus enhancing the reliability of the system;

[0027] This system integrates multiple functions such as environmental perception, dynamic driving force adjustment, multi-modal safety protection and user interaction. It effectively solves the problems faced by traditional convertibles when driving at high speeds and in complex environments, such as poor sealing and safety hazards in operation. It is suitable for scenarios such as tourism, urban public transportation, etc., and provides innovative technical support for the development of large electric convertible buses, which is in line with the development trend of intelligent new energy vehicles. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 This is a system architecture diagram of the present invention;

[0029] Figure 2 This is a control logic flow chart of the present invention. DETAILED DESCRIPTION

[0030] The present invention will be further explained below with reference to the accompanying drawings to facilitate better understanding by those skilled in the art.

[0031] Example 1

[0032] like Figure 1 As shown, the electric convertible control system of a large electric convertible bus includes an environmental monitoring module, a user interaction module, a safety control module and a drive execution module, which are electrically connected to the central control unit respectively. The environmental monitoring module is used to collect vehicle status information and surrounding environment data; the user interaction module provides human-computer interaction and feedback on vehicle dynamics through multi-module control; the safety control module monitors and ensures operational safety. The central control unit processes the data collected by the environmental monitoring module and controls the drive execution module to drive the convertible mechanism to expand or close according to the operating instructions issued by the user interaction module. The status information of the convertible mechanism is fed back to the user interaction module.

[0033] The environmental monitoring module includes a wind speed sensor, a rain sensor, a temperature and humidity sensor, a 360-degree surround-view camera, and a lidar. The wind speed sensor, mounted on the front roof, has a range of 0-30 m / s and an accuracy of ±0.5 m / s, and is used to measure wind speed around the vehicle. The rain sensor, with a resolution of 0.01 mm / min, is mounted on the inside of the front windshield near the rearview mirror. It detects the presence and amount of rainfall and provides timely feedback to the system so that appropriate measures can be taken when it rains. The temperature and humidity sensor, with a range of -40°C to 85°C, is mounted in the cockpit near the air-conditioning vents to monitor the temperature and humidity inside and outside the vehicle. The 360-degree surround-view cameras, with a resolution of 1280×720 at 30 fps, are located in the center of the top, front, back, left, and right sides of the vehicle, providing all-round visual monitoring of the vehicle's surroundings. The lidar, mounted in the center of the roof, has a detection range of 0.1-50 m and is used to detect obstacles.

[0034] The central control unit utilizes an automotive-grade MCU (Infineon TC397) core chip, integrating multiple decision logics and employing a Kalman filter-based data fusion algorithm to process data collected by multiple sensors. This algorithm enables the system to generate real-time environmental risk levels, such as issuing a "strong wind warning" when wind speeds are excessive, and providing prompts when approaching obstacles are detected, improving the system's responsiveness to environmental changes. The system also features speed limiting, window linkage, and air pressure differential compensation. The system is configured to only allow the convertible top to operate at speeds ≤30 km / h. Before the top is lowered, the windows are automatically lowered to a safe height, such as 20 cm. The pressure differential between the interior and exterior of the cockpit is dynamically calculated based on vehicle speed and adapted to the corresponding driving force curve. For example, at a speed of 100 km / h, the hydraulic system pressure is increased to 180 bar to enhance the seal of the convertible top.

[0035] The drive execution module adopts a redundant drive design and hydraulic sealing mechanism. It uses dual permanent magnet synchronous motors with a planetary gear reducer to support seamless switching between the main and standby motors. The dual permanent magnet synchronous motors have a rated power of 2.5kW and a peak torque of 120N·m. During the closing phase, the sealing strip pressure is dynamically adjusted by a hydraulic cylinder, and elastic memory alloy materials (such as nickel-titanium alloy) are used to enhance airtightness.

[0036] The above-mentioned safety control module includes emergency braking and self-test systems. When the environmental monitoring module detects an obstacle invading the path, it triggers the motor's reverse torque and activates the sound and light alarm; during the first startup of each day, it automatically detects the motor winding impedance, guide rail wear and sensor calibration status, and generates a health report that is pushed to the user end.

[0037] Furthermore, the above-mentioned user interaction module is multi-modally controlled through the vehicle touch screen, mobile phone APP and voice commands. The vehicle touch screen UI interface displays the convertible opening and closing progress in real time, the mobile phone APP supports remote appointment of opening and closing, and the voice commands are compatible with Chinese and English wake-up words; the convertible status is prompted through HUD projection, such as "unfolding completed, sealing pressure normal".

[0038] The various sensors in the environmental monitoring module transmit collected data to the central control unit. After processing the data, the central control unit sends control instructions to the drive execution module and the safety control module. The drive execution module activates the convertible mechanism, while the safety control module monitors and ensures operational safety. The convertible mechanism's status information is fed back to the user interaction module, and user operation instructions are then transmitted back to the central control unit, forming a complete data interaction process.

[0039] Example 2

[0040] The electric convertible top control method of a large electric convertible bus comprises the following steps:

[0041] Step 1: Pre-action condition verification

[0042] (1) After the system is powered on, the self-test system of the safety control module checks the motor, sensor and communication circuit to ensure that the system is in normal working condition;

[0043] (2) After the user triggers the convertible command, the system collects vehicle speed and environmental data in real time. When the vehicle speed is ≤30km / h, there is no rain or snow, the wind speed is <10m / s, the temperature is within the range of 20℃~60℃ and there are no obstacles, the system proceeds to the next step.

[0044] Step 2: Dynamic opening and closing control

[0045] (1) During the deployment phase, the window automatically drops 20 cm, the convertible cover is unlocked, and the electromagnetic lock release time is ≤ 0.3 s. The dual motors adjust the speed in stages, starting at a low speed (0.2 m / s) to reduce the impact force during startup; then entering a uniform speed stage (0.5 m / s) to improve deployment efficiency; and decelerating at the end (0.1 m / s) to avoid excessive impact when fully deployed. During the deployment process, the laser radar scans the path in real time. Once an obstacle (such as a branch or drone) is detected, the action is immediately paused and the user is prompted.

[0046] (2) In the closing stage, the hydraulic system dynamically increases pressure according to the vehicle speed, and the sealing strip pressure formula P = kv 2 +b adjusts the pressure, where k = 0.05 bars 2 / m 2 , b = 10 bar, v is the vehicle speed. After closing, the drainage channel is activated, and the slope is designed to be 3° to ensure that rainwater can be smoothly directed to the water collection tank to prevent water accumulation.

[0047] Step 3: Exception handling mechanism

[0048] (1) Motor overload: When the motor is overloaded, the system automatically switches to the standby motor and records the fault code to facilitate subsequent maintenance;

[0049] (2) Communication interruption: If communication interruption occurs, the system activates the local cache control logic and formulates fault descriptions, fault mode indications, possible causes and solutions for different fault codes to ensure the normal operation of the basic functions of the convertible (such as emergency shutdown);

[0050] (3) Common faults and solutions: For different fault codes (such as SPN2025, SPN3088, etc.), detailed fault description, fault mode indication (FMI), possible causes and solutions are listed to facilitate maintenance personnel to quickly locate and solve the problem. The specific settings are as follows:

[0051]

[0052]

[0053] This system integrates multiple functions such as environmental perception, dynamic driving force adjustment, multimodal safety protection and user interaction, solving the automation, safety and sealing problems of large convertible buses in complex environments. It is suitable for scenarios such as tourism, urban public transportation, and is in line with the development trend of intelligent new energy vehicles.

[0054] The above-described embodiments are merely descriptions of preferred embodiments of the present invention and are not intended to limit the scope of the present invention. Any modifications and improvements made to the technical solution of the present invention by those skilled in the art without departing from the spirit and principles of the present invention shall fall within the scope of protection defined by the claims of the present invention.

Claims

1. The electric convertible control system of a large electric convertible bus is characterized by: It includes an environmental monitoring module, a user interaction module, a safety control module and a drive execution module that are electrically connected to the central control unit respectively. The environmental monitoring module is used to collect vehicle status information and surrounding environment data; the user interaction module provides human-computer interaction and feedback on vehicle dynamics through multi-module control; the safety control module monitors and ensures operational safety. The central control unit processes the data collected by the environmental monitoring module and controls the drive execution module to drive the convertible mechanism to expand or close according to the operating instructions issued by the user interaction module. The status information of the convertible mechanism is fed back to the user interaction module.

2. The electric convertible top control system for a large electric convertible bus according to claim 1, characterized in that: The environmental monitoring module includes: Wind speed sensor, installed at the front of the roof, with a range of 0-30m / s and an accuracy of ±0.5m / s, used to measure the wind speed around the vehicle; Rain sensor, with a resolution of 0.01mm / min, is installed on the inside of the front windshield near the rearview mirror to detect whether and how much rainfall is expected; Temperature and humidity sensors are installed in the cockpit near the air-conditioning vents to monitor the temperature and humidity inside and outside the vehicle; 360° surround-view cameras with a resolution of 1280×720@30fps are located in the front, back, left, right, top, and center of the vehicle, enabling all-round visual monitoring of the vehicle's surroundings. The laser radar is installed in the center of the roof with a detection range of 0.1-50m and is used to detect obstacles.

3. The electric convertible top control system for a large electric convertible bus according to claim 1, characterized in that: The central control unit adopts an automotive-grade MCU core chip, which integrates multiple judgment logics and adopts a data fusion algorithm based on Kalman filtering to process data collected by multiple sensors. It has speed limit, window linkage and air pressure difference compensation functions. The system is set to allow convertible operation only when the vehicle speed is ≤30km / h. Before the convertible operation, the window is automatically controlled to drop to a safe height, and the air pressure difference inside and outside the cockpit is dynamically calculated according to the vehicle speed, and the corresponding driving force curve is matched.

4. The electric convertible top control system for a large electric convertible bus according to claim 1, characterized in that: The drive execution module uses dual permanent magnet synchronous motors with a planetary gear reducer to support seamless switching between the main and standby motors. The dual permanent magnet synchronous motors have a rated power of 2.5kW and a peak torque of 120N·m. During the closing phase, the sealing strip pressure is dynamically adjusted by a hydraulic cylinder, and elastic memory alloy material is used to enhance airtightness.

5. The electric convertible top control system for a large electric convertible bus according to claim 1, characterized in that: The safety control module includes an emergency braking and self-test system. When the environmental monitoring module detects an obstacle intruding into the path, it triggers the motor's reverse torque and activates the sound and light alarm; when it is started for the first time each day, it automatically detects the motor winding impedance, guide rail wear and sensor calibration status, and generates a health report that is pushed to the user end.

6. The electric convertible top control system for a large electric convertible bus according to claim 1, characterized in that: The user interaction module is multi-modally controlled through the vehicle touch screen, mobile phone APP and voice commands. The vehicle touch screen UI interface displays the convertible opening and closing progress in real time, the mobile phone APP supports remote appointment opening and closing, and the voice commands are compatible with Chinese and English wake-up words; the convertible status is prompted through HUD projection.

7. The electric convertible top control method for a large electric convertible bus according to claim 1, characterized in that: The following steps are involved: Pre-action condition verification: After the system is powered on, the safety control module verifies the motor, sensors, and communication circuits. After the user triggers the open-top command, the system collects vehicle speed and environmental data. When the vehicle speed is ≤30 km / h, there is no rain or snow, the wind speed is <10 m / s, the temperature is between 20°C and 60°C, and there are no obstacles, the system proceeds to the next step. Dynamic opening and closing control: During the deployment phase, the window automatically drops 20cm, the convertible cover is unlocked, and the electromagnetic lock release time is ≤ 0.3s. The dual motors adjust their speed in stages, and the laser radar scans the path in real time. When an obstacle is detected, the action is paused and the user is notified. During the closing phase, the hydraulic system dynamically increases pressure according to vehicle speed, and after closing, the drainage channel is activated with a slope of 3°; Exception handling mechanism: When a motor is overloaded, the system switches to a backup motor and records the fault code. When communication is interrupted, the system enables local cache control logic. For different fault codes, the system provides fault descriptions, fault mode indications, possible causes, and solutions.

8. The electric convertible top control method for a large electric convertible bus according to claim 7, characterized in that: In the dual-motor staged speed regulation, the initial low speed is 0.2m / s, the uniform speed stage is 0.5m / s, and the final deceleration stage is 0.1m / s; During the closing phase, the hydraulic system adjusts the pressure according to the sealing strip pressure formula P=kv²+b; where k=0.05bars² / m², b=10bar, and v is the vehicle speed.

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