Emergency door opening system of automobile

Abstract

The invention discloses an automobile emergency door opening system which comprises a voltage detection circuit module, a standby battery management circuit module, an MCU microprocessor module, an immersion detection module, an actuator module and a communication circuit module. The soaking detection module is used for detecting whether a vehicle door is soaked, two electrodes are installed on the left and right positions of a door handle in a vehicle body, and whether the vehicle body is soaked is judged by detecting capacitance between the two electrodes; when it is detected that the vehicle body is soaked in water, the MCU microprocessor module can obtain vehicle body posture information, vehicle speed information and rotating speed information, and if the vehicle body information is in a forward gear, the vehicle speed and the rotating speed at the last moment are all normal running speeds; when a forward gear is suddenly changed at the current moment, the vehicle speed is 0, the rotating speed is 0 and the vehicle body posture information is abnormal, an alarm emergency door opening system of the actuator module is immediately started to quickly and forcefully push a vehicle door open; the door can be automatically opened when the vehicle body detects an accident, and the survival rate of accident personnel can be greatly increased.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of automobiles, in particular to an automobile emergency door opening system. BACKGROUND

[0002] In a serious traffic accident, the battery power supply system is short-circuited, power is cut off, and the vehicle body is immersed in water (the vehicle falls into the river), so that the entire vehicle power supply system will be paralyzed. The vehicle door and the vehicle window, which are dependent on the power supply system for movement, will fail as an important escape and rescue passage, making it difficult for personnel to escape or be rescued. Therefore, an automobile emergency door opening system is urgently needed, which can automatically open the door when the vehicle body detects an accident, greatly improving the survival rate of personnel in an accident, especially in the case of a vehicle falling into a river due to an accident and the vehicle body colliding and catching fire. SUMMARY

[0003] In view of the problems in the prior art, the present application provides an automobile emergency door opening system, which can automatically open the door when the vehicle body detects an accident, greatly improving the survival rate of personnel in an accident, especially in the case of a vehicle falling into a river due to an accident and the vehicle body colliding and catching fire.

[0004] The technical solution of the present application is: an automobile emergency door opening system, comprising a voltage detection circuit module, a backup battery management circuit module, an MCU microprocessor module, a water immersion detection module, an actuator module and a communication circuit module.

[0005] The voltage detection circuit module is used to detect the voltage of the vehicle body battery.

[0006] The backup battery management circuit module is used to collect the backup battery voltage, temperature and charge and discharge current, and to charge the backup battery in real time to prevent overcharging and overdischarging.

[0007] The communication circuit module is used to handshake with the vehicle body controller and obtain the vehicle body gear information, engine speed information and vehicle speed information.

[0008] The water immersion detection module is used for detecting whether the door position is immersed in water. Two electrodes are installed at the left and right positions of the inner handle of the vehicle body. Whether the vehicle body is immersed in water is determined by detecting the capacitance between the two electrodes. Under normal circumstances, the air between the two electrodes has a low dielectric constant, and the electrode capacitance detected is very small. When the vehicle body is immersed in water and submerged to half of the door, the medium between the electrodes changes from air to water, and the dielectric constant of water is much larger than that of air, so the detected capacitance is very large. When the capacitance between the two electrodes is greater than 10 pF (very large, generally 10-20 pF, related to the area and distance of the detection electrode and the dielectric constant of water), it indicates that the vehicle body is immersed in water. The MCU microprocessor module obtains the vehicle body posture information, vehicle speed information and rotation speed information. If the vehicle body information at the last moment is forward gear, the vehicle speed and rotation speed are normal driving speed, and the vehicle body posture information (the car crashes into the circuit bridge and falls into the river) suddenly becomes forward gear, the vehicle speed is 0 (the engine stalls due to water immersion), the rotation speed is 0 (the engine stalls due to water immersion), and the vehicle body posture information (the car crashes into the circuit bridge and falls into the river) is abnormal, the alarm emergency door opening system of the actuator module will be immediately started to quickly and powerfully push the door open.

[0009] The actuator module is used for opening the door when an emergency situation occurs.

[0010] Further, the actuator module is a mechanical energy storage electric actuator. When the vehicle is powered on, the DC motor drives the gear reduction system to wind the spring, converting electrical energy into mechanical energy and locking it through an electronic switch. When an emergency situation occurs and the door needs to be opened, the MCU microprocessor module will unlock the spring through the electronic switch, releasing the mechanical energy of the spring to open the door.

[0011] Further, the actuator module is a pneumatic energy storage electric actuator. When the vehicle is powered on, the electric compressor compresses air into a high-pressure cylinder and locks it through an electronic valve. When an emergency situation occurs and the door needs to be opened, the microprocessor MCU will open the electronic valve to convert the high-pressure air in the cylinder into mechanical energy through mechanical transmission to open the door.

[0012] The greatest advantage of the device is that in the event of an accident, the vehicle system may lose power, and the actuator can ensure effective opening of the door in the event of system power loss.

[0013] Further, it also includes a speed detection module that uses a hardware circuit to measure vehicle speed information as a complement to the communication circuit module for obtaining vehicle body information. When the vehicle speed suddenly drops to 0, accompanied by a negative acceleration that causes the vehicle speed to drop to 0, the alarm emergency door opening system of the actuator module will be triggered.

[0014] Furthermore, it also includes a gyroscope sensor module, which is used to collect vehicle attitude and acceleration information. When any of the following states occur: first, abnormal acceleration is detected within a threshold time and the vehicle speed suddenly drops to 0 km / h; second, the vehicle body overturns and exhibits an abnormal vehicle attitude angle; third, multiple abnormal accelerations or multiple abnormal vehicle attitude angles occur consecutively; after combining the vehicle speed and vehicle attitude information, when the vehicle speed is 0 and the vehicle attitude no longer changes, the alarm emergency door opening system of the actuator module is activated to open the door.

[0015] Furthermore, when the voltage detection circuit module detects that the vehicle battery is low on power, it will notify the vehicle controller via the communication circuit module that the vehicle battery needs to be replaced or the circuit needs to be repaired, and at the same time disable the backup battery charging function.

[0016] Furthermore, when the backup battery management circuit module detects an abnormal low battery level in both the vehicle battery and the backup battery, the MCU microprocessor module will send a message to the vehicle controller via the communication circuit module requesting charging, and simultaneously disable the alarm emergency door opening system of the actuator module.

[0017] The beneficial effects of this invention are: it provides an emergency door opening system for automobiles that can automatically open the door when an accident is detected on the vehicle body, which can greatly improve the survival rate of accident victims, especially in cases where the car falls into a river due to an accident and the vehicle body catches fire before it can accurately and quickly open the door. Attached Figure Description

[0018] Figure 1 A system block diagram for an emergency door opening system in a car. Detailed Implementation

[0019] The present invention will now be further described with reference to the accompanying drawings.

[0020] like Figure 1 The car emergency door opening system shown consists of eight main components: a voltage detection circuit module, a backup battery management circuit module, an MCU microprocessor module, a water immersion detection module, a gyroscope (IMU) sensor module, an actuator, a speed detection module, and a communication circuit module.

[0021] The MCU microprocessor module is responsible for data acquisition, judgment, and the release of actions.

[0022] Voltage detection circuit module, mainly responsible for detecting the voltage of the vehicle body battery, when the vehicle body voltage is powered off, the MCU will record this event. Voltage acquisition is only used to judge whether the vehicle body battery is powered on or not, which affects the management of the backup battery charging, and does not directly trigger the emergency door opening action. When the vehicle body battery is out of power, it will inform the vehicle controller through the communication circuit that the battery needs to be replaced or the circuit needs to be repaired, and the backup battery charging function is disabled.

[0023] Backup battery management circuit module, which collects backup battery voltage, temperature, charging and discharging current. This part mainly provides power supply for MCU to release actuator after the whole vehicle system is powered off. Combined with voltage acquisition data and battery voltage, temperature, charging and discharging current, the backup battery is charged in real time to prevent overcharging and overdischarging. The circuit does not directly trigger the emergency door opening action. When the car battery is out of power and the backup battery is out of power, the MCU will send a charge request to the vehicle controller through the communication circuit and alarm the emergency door opening system function is limited.

[0024] Communication circuit module, mainly responsible for handshake with the vehicle controller and obtaining vehicle gear information, engine speed information and vehicle speed information. Normal situation: the communication circuit will actively send a handshake signal to the vehicle controller every 1S and obtain gear information, engine speed and vehicle speed information every 1S. The vehicle controller can handshake every 1S, and the obtained gear, speed and speed signals are logically matched (such as forward gear, engine speed 2500 revolutions / second, vehicle speed 60 kilometers / hour). The system is normal. Abnormal situation: communication with the vehicle controller is lost (cannot obtain the handshake signal and other information of the vehicle controller) or abnormal (the vehicle controller replies the handshake signal beyond the time limit, the reply interval is 1S, the actual reply is obviously longer than 1S, 2S or even longer); logic mismatch: such as car parking idle state, the obtained gear is reverse gear, and the engine speed is abnormal (such as 200 revolutions / second or 10000 revolutions / second), which will be recorded as an abnormal event of the vehicle controller, but will not start the emergency door opening system.

[0025] Speed detection module, which detects vehicle speed information in real time. When the detected vehicle speed suddenly drops to 0, it will be recorded by the system. Unlike the communication circuit module that obtains vehicle information, this circuit directly measures vehicle speed information as a complement to the communication circuit to prevent communication data loss and obtain vehicle speed information failure, and increase the reliability of data acquisition. For example, the car crashes into a roadside tree due to operation error on a flat road, which will cause the vehicle speed to drop to 0, accompanied by a negative acceleration that causes the vehicle speed to drop to 0. At this time, the alarm emergency door opening system of the actuator module will be triggered.

[0026] Actuator module, no data acquisition, execute door opening components.

[0027] Gyroscope (IMU) sensor module, the main function of the sensor to detect vehicle acceleration, attitude information. Vehicle collision will produce an abnormal acceleration (such as: highway speed 120 km / h, severe collision in 5 seconds or even 2 seconds to detect -20 m / s², -50 m / s² and the vehicle speed dropped to 0 km / h), and the vehicle body overturning (vehicle body horizontal angle from 0 degrees to 90 degrees, vertical angle from 0 degrees to 45 degrees (non-normal state of vehicle attitude angle), or multiple mutations (vehicle accident vehicle rollover) when the vehicle body attitude as an important event recorded, as the trigger condition to start the emergency door, after the vehicle speed and vehicle body attitude information to be stable (severe collision after the vehicle speed is 0, the vehicle body attitude no longer change (vehicle body no longer rolling)) to start the actuator to open the door for self-help and external rescue personnel to provide conditions. If the state of the severe collision is unstable (the vehicle body continues to roll, the vehicle speed is not 0), the actuator will not work, to prevent the vehicle occupants from being thrown out and causing secondary injury.

[0028] Water detection module, detect whether the door is immersed in water. The working principle is to detect the capacitance between the two electrodes to determine whether the vehicle body is immersed in water; the electrode is installed on the inside door handle left and right position, under normal circumstances, the electrode between the two electrodes is air, the dielectric constant is relatively low, the electrode capacitance is very small. When the vehicle body is immersed and submerged to half the door, the medium between the electrodes changes from air to water, and the dielectric constant of water is much larger than that of air, and the detected capacitance is very large. When detecting water immersion, the MCU microprocessor will obtain the vehicle body attitude information, vehicle speed information, and rotation speed information, if the previous time (half a minute ago vehicle information: forward gear, speed 80 km / h, rotation speed 2800 rpm) suddenly changes to forward gear, speed 0 (engine water cooling engine), rotation speed 0 (engine water cooling engine), vehicle body attitude information (vehicle crash bridge and fall into the river) abnormal will start the actuator to quickly and forcefully push the door open, to prevent the vehicle from falling into the water after the vehicle body inside and outside pressure is inconsistent, and the vehicle occupants cannot open the door to miss the best escape opportunity.

[0029] Water detection module mainly detects the sudden accident of the vehicle falling into the river, sea, and triggers the detection amount. When the vehicle body attitude, vehicle speed, engine rotation speed and vehicle body immersion are abnormal, the actuator will directly trigger the door opening. The only difference between the accident on land and the accident in the water is that the detection will immediately trigger the actuator to open the door. The accident on land needs to wait for the vehicle body to be stable before opening the door. The accident on land considers that opening the door when the state is unstable will cause the vehicle occupants to be thrown out and cause secondary injury.

[0030] Voltage detection circuit module: this part mainly has resistance voltage dividing circuit and filter circuit to microprocessor, which converts battery voltage into digital quantity that microprocessor can recognize. The circuit interface has only one voltage signal to microprocessor AD (analog-digital) conversion interface interconnection.

[0031] Speed detection module: this circuit mainly has current limiting and waveform shaping circuit to convert vehicle speed signal into square wave frequency signal that microprocessor can recognize to microprocessor interrupt function interface interconnection, which calculates input frequency value by recording interrupt times to calculate vehicle speed signal.

[0032] Backup battery management circuit module: this circuit mainly has constant voltage and constant current collection to charge backup battery, and enables control signal to control whether to charge battery. At the same time, through the voltage dividing circuit and the dummy load, the battery state is monitored. When the battery needs to be charged, the voltage of the body battery is detected. If the body voltage is normal and the backup battery is depleted, the enable signal is started to charge the battery, and the battery temperature is detected to control the charging current. When the body battery is depleted or offline, the communication circuit sends a message to the vehicle controller to inform the user to repair, and the emergency door opening system function is limited. This part has the following interfaces interconnected with the microprocessor: general input and output interface to control the start and stop of the charging circuit, five AD (analog-digital) conversion interfaces to monitor the charging voltage, charging current, battery temperature, discharge current and backup battery status (with dummy load voltage).

[0033] Communication circuit module: it converts microprocessor (MCU) single-ended signal into CAN (control area network) signal with stronger anti-interference ability, which is an emergency door opening system and vehicle controller information communication interaction channel. This part has CANTX (controller area network transmission signal) and CANRX (controller area network receiving signal) interfaces interconnected with the microprocessor.

[0034] Actuator module: mechanical energy storage electric actuator, which has a DC motor, a gear reduction system and a spring device. When the vehicle is powered, the DC motor will start to drive the gear reduction system to wind the spring and store the electrical energy as mechanical energy. When an emergency situation occurs and the door needs to be opened, the mechanical energy of the spring will be released to open the door. Or a pneumatic energy storage electric actuator, which will start the electric compressor to compress air into a high-pressure cylinder when the vehicle is powered and lock it through an electronic valve. When an emergency situation occurs and the door needs to be opened, the microprocessor MCU will open the electronic valve to convert the high-pressure air in the cylinder into mechanical energy through mechanical transmission to open the door. The biggest advantage of this device is that in the event of a vehicle accident, the vehicle system may lose power, and this actuator can ensure effective opening of the door once in the event of system power failure. This part has PWM (pulse width modulation) interface, AD (analog-digital) conversion interface to detect motor current, and general input and output interface to control motor direction interconnected with microprocessor control interface.

[0035] IMU sensor module: this part is interconnected with the microprocessor IIC (integrated circuit bus) interface, the microprocessor configures sensor parameters through the interface, reads the vehicle body information.

[0036] Water immersion detection circuit module: this part is interconnected with the microprocessor IIC (integrated circuit bus) interface, the microprocessor configures sensor parameters through the interface, reads the electrode capacitance size to determine whether the vehicle body is immersed.

[0037] The above only describes the preferred embodiments of the present application, and it should be noted that for those skilled in the art, without departing from the principles of the present application, a number of improvements and refinements can be made, which should be considered as the protection scope of the present application.

Claims

1. An emergency door opening system for automobiles, characterized in that: It includes a voltage detection circuit module, a backup battery management circuit module, an MCU microprocessor module, a water immersion detection module, an actuator module, and a communication circuit module; The voltage detection circuit module is used to detect the voltage of the vehicle battery. The backup battery management circuit module is used to collect backup battery voltage, temperature and charging / discharging current, and to charge the backup battery in real time to prevent overcharging and over-discharging. The communication circuit module is used to shake hands with the body controller and obtain body gear information, engine speed information and vehicle speed information; The water immersion detection module is used to detect whether the door is flooded. Two electrodes are installed on the left and right sides of the door handle inside the vehicle body. The capacitance between the two electrodes is used to determine whether the vehicle body is flooded. When the capacitance between the two electrodes is greater than 10 pF, it means that the vehicle body is flooded. The MCU microprocessor module will obtain the vehicle body posture information, vehicle speed information, and rotation speed information. If the vehicle body information was in forward gear at the previous moment, and the vehicle speed and rotation speed were normal driving speeds, and at the current moment it suddenly changed to forward gear, the vehicle speed was 0, the rotation speed was 0, and the vehicle body posture information was abnormal, the actuator module's alarm emergency door opening system will be activated immediately to quickly and forcefully push the door open. The actuator module is used to open the door when an emergency requires the MCU microprocessor module to control the actuator module to do so.

2. The vehicle emergency door opening system according to claim 1, characterized in that: The actuator module is a mechanical energy storage electronic control actuator. When the vehicle body is powered on, it will start a DC motor to drive the gear reduction system to wind up the spring, convert electrical energy into mechanical energy, store it, and lock it with an electronic switch. When an emergency requires opening the door, the MCU microprocessor module will unlock the spring through the electronic switch, release the mechanical energy of the spring, and open the door.

3. The vehicle emergency door opening system according to claim 1, characterized in that: The actuator module is a pneumatic energy storage electronic control actuator. When the vehicle body is powered on, it will start the electric compressor to compress air into the high-pressure gas cylinder and lock it through the electronic valve. When an emergency requires opening the door, the microprocessor MCU will open the electronic valve and convert the high-pressure air in the gas cylinder into mechanical energy to open the door through mechanical transmission.

4. The vehicle emergency door opening system according to claim 1, characterized in that: It also includes a speed detection module, which uses hardware circuitry to measure vehicle speed information, serving as a complement to the communication circuit module in acquiring vehicle information. When the vehicle speed suddenly drops to 0, accompanied by the detection of a negative acceleration metric that causes the vehicle speed to drop to 0, the actuator module's alarm emergency door opening system will be triggered.

5. The vehicle emergency door opening system according to claim 1, characterized in that: It also includes a gyroscope sensor module, which is used to collect vehicle attitude and acceleration information. When any of the following states occur: First, abnormal acceleration is detected within a threshold time and the vehicle speed drops suddenly to 0 km / h; Second, the vehicle body overturns and exhibits an abnormal vehicle attitude angle; Third, multiple abnormal accelerations or multiple abnormal vehicle attitude angles occur consecutively; After combining the vehicle speed and vehicle attitude information, when the vehicle speed is 0 and the vehicle attitude no longer changes, the alarm emergency door opening system of the actuator module is activated to open the door.

6. The vehicle emergency door opening system according to claim 1, characterized in that: When the voltage detection circuit module detects that the vehicle battery is low on power, it will notify the vehicle controller via the communication circuit module that the vehicle battery needs to be replaced or the circuit needs to be repaired, and at the same time disable the backup battery charging function.

7. The vehicle emergency door opening system according to claim 1, characterized in that: When the backup battery management circuit module detects an abnormal low battery level in both the vehicle battery and the backup battery, the MCU microprocessor module will send a message to the vehicle controller via the communication circuit module requesting charging, and at the same time disable the alarm emergency door opening system of the actuator module.

Images