Vehicle door control system and control method

Abstract

The invention provides a vehicle door control system and method, and the system comprises a vehicle door controller, infrared emitters, infrared receivers and a combined pressure rod, and a plurality of infrared emitters are arranged on the circle, used for making contact with a sealing rubber strip of a vehicle door frame, of a vehicle door. A plurality of infrared receivers are arranged at a sealing rubber strip of the vehicle door frame, and the infrared emitters are in one-to-one correspondence with the infrared receivers; the outer end of the combined pressure rod is rotationally connected with the lower portion of the vehicle door, and the inner end of the combined pressure rod is rotationally connected with the lower portion of the vehicle door frame. The infrared emitter, the infrared receiver and the combined pressure rod are electrically connected with the vehicle door controller respectively; the vehicle door controller controls the combined pressure rod to move correspondingly according to information provided by the infrared receiver. The anti-pinch effect can be well achieved, the car door position can be locked in time to avoid danger when danger occurs during door opening, and after a car collides, the car door can be actively pushed to be opened so that people can escape.

Description

Technical Field

[0001] This invention belongs to the field of vehicle control technology, specifically relating to a door control system and control method. Background Technology

[0002] Currently, anti-pinch systems for car doors are generally only used in vehicles with automatic doors. Moreover, their anti-pinch method generally uses a Hall effect motor to drive the door. The Hall effect sensor detects the motor speed and sends the speed signal to the door control system. When the door gets caught in an obstacle during closing, the motor speed will drop due to the resistance torque. When the speed drops to a set threshold, the door control system determines that an obstacle has been caught, controls the motor to reverse, and reopens the door at a certain angle, thereby preventing injury to people.

[0003] However, it has the following drawbacks: its Hall sensor itself has a certain degree of error, and when it pinches a small, soft obstacle, such as an infant's finger, the obstacle is unlikely to provide sufficient resistance torque to the motor, failing to reduce the motor speed to the set threshold, thus failing to produce an anti-pinch effect and causing injury; if the obstacle is pinched at the door hinge, due to the proximity of the obstacle to the hinge and the short lever arm, the resistance torque provided to the motor after pinching a person's hand or other body part will be relatively small, failing to reduce the motor speed to the set threshold, thus preventing the system from triggering the anti-pinch function and creating a risk of injury; its anti-pinch system relies on a Hall motor, and since it is not an automatic door vehicle, the door opening and closing relies on manual operation, and the door lacks an anti-pinch function, easily causing the risk of injury; the commonly available electric suction doors, when the door is automatically closed... Before the door closes, an anti-pinch detection is performed. However, during the automatic closing process, the door control system stops performing the anti-pinch detection. If a person accidentally puts their hand into the gap in the door at this time, they will be pinched. If there are obstacles, pedestrians, or other vehicles nearby on the outside of the door, or if the vehicle is not completely stopped, and if the occupants open the door due to poor safety awareness, it can easily cause the door to be damaged, the door to scrape against pedestrians or vehicles, or passengers to fall out of the unstoppable car. Mechanical door opening limiters are generally integrated at the door hinges. These mechanical door opening limiters are easily affected by lane slope and wind, and cannot effectively limit the opening. Moreover, the limiting angle is not adjustable. After a collision, the door lock control system can generally unlock automatically. However, if the door is deformed by the impact and cannot be opened after unlocking, the occupants will be unable to escape.

[0004] Therefore, how to design a door control system and control method that can achieve a better anti-pinch effect and better meet the usage requirements has become a technical problem that urgently needs to be solved by those skilled in the art. Summary of the Invention

[0005] The purpose of this invention is to provide a vehicle door control system and control method to solve the above-mentioned technical problems in the prior art.

[0006] To achieve the above objectives, the present invention provides the following technical solution:

[0007] A vehicle door control system includes a door controller, an infrared transmitter, an infrared receiver, and a combined pressure rod. Multiple infrared transmitters are arranged around a perimeter of the door for contact with a sealing strip on the door frame, and multiple infrared receivers are arranged on the sealing strip of the door frame, with each infrared transmitter corresponding to a specific infrared receiver. The outer end of the combined pressure rod is rotatably connected to the lower part of the door, and the inner end of the combined pressure rod is rotatably connected to the lower part of the door frame. The infrared transmitter, the infrared receiver, and the combined pressure rod are electrically connected to the door controller. The door controller controls the combined pressure rod to perform corresponding movements based on information provided by the infrared receiver.

[0008] Preferably, the infrared emitter emits infrared rays in a wide-angle fan shape parallel to the ground.

[0009] Preferably, the lower part of the door is provided with an external mounting bracket, the lower part of the door frame is provided with an internal mounting bracket, the outer end of the combined pressure rod is rotatably connected to the external mounting bracket, and the inner end of the combined pressure rod is rotatably connected to the internal mounting bracket.

[0010] Preferably, the combined pressure rod includes a gas cylinder, with a gas channel and a liquid channel hole on the left side of the gas cylinder. The gas channel is connected to the inner cavity of the gas cylinder. A gas piston is slidably disposed in the lower part of the gas cylinder, and an external mounting support rod for rotatable connection with an external mounting bracket is connected to the lower side of the gas piston. An internal mounting support rod for rotatable connection with an internal mounting bracket is disposed at the upper end of the gas cylinder. A liquid cylinder is disposed in the upper part of the gas cylinder, with the upper end of the liquid cylinder being integral with the gas cylinder. The lower end of the liquid cylinder is connected to the gas cylinder, and a liquid piston is slidably disposed in the lower end of the liquid cylinder. The liquid piston is connected to a connecting rod... The rod is connected to the pneumatic piston, and the hydraulic piston, pneumatic piston, connecting rod, liquid cylinder, and gas cylinder are all coaxial. A liquid channel communicating with the inner cavity of the liquid cylinder is provided on the left side, and the liquid channel extends out of the liquid channel hole. A displacement sensor for detecting the piston's movement stroke is provided on the lower side of the pneumatic piston. The gas channel is connected to the gas storage tank through a cylinder solenoid valve, and the liquid channel is connected to the liquid storage tank through a liquid cylinder solenoid valve and a hydraulic pump. The hydraulic pump, the displacement sensor, the pneumatic cylinder solenoid valve, and the liquid cylinder solenoid valve are all electrically connected to the door controller.

[0011] Preferably, a sealing ring is provided between the liquid channel and the liquid channel hole.

[0012] A control method based on the above-described door control system, comprising:

[0013] When any infrared receiver fails to receive infrared light, the door controller determines that there is an obstacle between the door and the door frame, and uses a combined pressure rod to keep the door stationary to prevent it from being trapped.

[0014] Preferably, it further includes: when a person manually controls the opening and closing of the car door, the displacement sensor outputs the position information of the air piston to the car door controller. The car door controller uses this position information to calculate the opening angle of the car door. When the car door is opened or closed to the set door limit angle, the car door controller controls the cylinder solenoid valve to close, so that air cannot enter or exit the gas passage, which increases the movement resistance of the air piston. The resistance is transmitted to the car door through the external mounting rod and external mounting bracket, which has a limiting effect on the car door. However, since air can be compressed, the car door will not be completely stuck. As the person continues to forcefully open and close the car door, when the position information of the air piston output by the displacement sensor exceeds the door limit angle, the car door controller controls the cylinder solenoid valve to open, so that air can re-enter and exit the gas passage. The movement resistance of the air piston decreases, the door limiting effect disappears, and the car door can be opened or closed normally.

[0015] Preferably, it also includes: a door controller that collects information about the vehicle's surroundings provided by ultrasonic radar and millimeter-wave radar on the vehicle, and when the door is near a static object, controls the hydraulic cylinder solenoid valve to limit the door opening angle based on the distance between the vehicle and the static object, so as to avoid a collision.

[0016] Preferably, it further includes: when a pedestrian or vehicle is detected passing by at close range outside the door, the door controller closes the hydraulic cylinder solenoid valve to prevent the door from opening and avoid danger; after the vehicle or pedestrian leaves, the hydraulic cylinder solenoid valve is opened again so that the door can resume normal opening and closing; when the vehicle has not come to a complete stop, i.e., the vehicle speed is not 0, the hydraulic cylinder solenoid valve is closed to prevent the door from opening and avoid danger.

[0017] Preferably, it further includes: after a vehicle collision and the door locks automatically unlock, the door controller controls the hydraulic pump to work, pumping hydraulic oil into the liquid cylinder to actively open the door.

[0018] The beneficial effects of this invention are as follows:

[0019] The door control system and control method of the present invention can effectively achieve the anti-pinch effect. When there is a danger in opening the door, it can lock the door position in time to avoid danger. After a vehicle collision, it can actively open the door to allow people to escape, thus better meeting the usage requirements. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments will be briefly described below, and the specific embodiments of the present invention will be further described in detail with reference to the drawings, wherein...

[0021] Figure 1 A schematic diagram showing the arrangement of the infrared transmitter and infrared receiver provided in an embodiment of the present invention;

[0022] Figure 2 This is a schematic diagram of the combined pressure bar during installation according to an embodiment of the present invention;

[0023] Figure 3 A schematic diagram of the combined pressure bar provided in an embodiment of the present invention;

[0024] Figure 4 This is a schematic diagram of the internal structure of the combined pressure bar provided in an embodiment of the present invention;

[0025] Figure 5 A schematic diagram of the external piping connection of the combined pressure bar provided in an embodiment of the present invention;

[0026] Figure 6 The control principle diagram of the door control system provided in the embodiment of the present invention.

[0027] Marked in the attached diagram:

[0028] 11. Infrared transmitter; 12. Infrared receiver;

[0029] 21. Combined pressure rod; 22. External mounting rod; 23. Internal mounting rod.

[0030] 24. Gas passage; 25. Liquid passage; 26. Gas cylinder; 261. Gas piston.

[0031] 27. Liquid cylinder; 271. Liquid piston; 28. Connecting rod; 29. ​​Displacement sensor.

[0032] 291. Hydraulic cylinder solenoid valve; 292. Hydraulic pump; 293. Liquid storage tank.

[0033] 294. Cylinder solenoid valve; 295. Air tank;

[0034] 31. External mounting bracket; 32. Internal mounting bracket; 33. Screw; 34. Fixing pin. Detailed Implementation

[0035] Various exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. It should be noted that, unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps set forth in these embodiments do not limit the scope of the invention.

[0036] The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit the invention or its application or use.

[0037] Techniques, methods, and equipment known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and equipment should be considered part of the specification.

[0038] In all the examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values.

[0039] like Figures 1 to 6 As shown, this embodiment of the invention provides a vehicle door control system, which includes a door controller, an infrared transmitter 11, an infrared receiver 12, and a combined pressure rod 21. Multiple infrared transmitters are arranged around a ring on the door for contact with the sealing strip of the door frame, and multiple infrared receivers are arranged at the sealing strip of the door frame, with each infrared transmitter corresponding to a specific infrared receiver. The outer end of the combined pressure rod is rotatably connected to the lower part of the door, and the inner end of the combined pressure rod is rotatably connected to the lower part of the door frame. The infrared transmitter 11, the infrared receiver 12, and the combined pressure rod are electrically connected to the door controller. The door controller controls the combined pressure rod 21 to perform corresponding movements based on information provided by the infrared receivers.

[0040] Furthermore, the infrared emitter emits infrared light in a wide-angle fan shape parallel to the ground. Using this design, each infrared receiver receives the infrared light emitted by its corresponding emitter, creating a tight light curtain between the door and the door frame, enabling rapid, blind-spot-free obstacle detection. It is understood that since each infrared emitter emits infrared light in a wide-angle fan shape parallel to the ground, the corresponding infrared receiver should always receive infrared light during the door's opening and closing process. Because it uses infrared recognition, regardless of how soft the obstacle is or how close it is to the door hinge, the door controller can quickly identify it and use a pressure rod to keep the door stationary, effectively preventing pinching.

[0041] Specifically, an external mounting bracket 31 is provided at the lower part of the door, and an internal mounting bracket 32 ​​is provided at the lower part of the door frame. The outer end of the combined pressure rod is rotatably connected to the external mounting bracket, and the inner end of the combined pressure rod is rotatably connected to the internal mounting bracket. At this time, the door and the external mounting bracket, as well as the door frame and the internal mounting bracket, can be detachably connected by screws 33.

[0042] Further, the combined pressure rod includes a gas cylinder 26. A gas channel 24 and a liquid channel hole are provided on the left side of the gas cylinder 26. The gas channel is connected to the inner cavity of the gas cylinder. A gas piston 261 is slidably disposed in the lower part of the gas cylinder. An external mounting support rod 22 for rotatable connection with an external mounting bracket is connected to the lower side of the gas piston. An internal mounting support rod 23 for rotatable connection with an internal mounting bracket is provided at the upper end of the gas cylinder. A liquid cylinder 27 is disposed in the upper part of the gas cylinder. The upper end of the liquid cylinder is integral with the gas cylinder, and the lower end of the liquid cylinder is connected to the gas cylinder. A liquid piston 271 is slidably disposed in the lower end of the liquid cylinder. The liquid piston is connected to the gas cylinder via a connecting rod 28. The air piston, hydraulic piston, connecting rod, liquid cylinder, gas cylinder, and two mounting supports are all coaxial. A liquid channel 25 communicating with the inner cavity of the liquid cylinder is provided on the left side, with the liquid channel extending out of the liquid channel hole. A displacement sensor for detecting the piston's stroke is provided on the lower side of the air piston. The gas channel is connected to an air tank 295 via a cylinder solenoid valve 294, and the liquid channel is connected to a liquid tank 293 via a liquid cylinder solenoid valve 291 and a hydraulic pump 292. The hydraulic pump, displacement sensor 29, cylinder solenoid valve, and liquid cylinder solenoid valve 291 are electrically connected to the door controller. With this design, when the door opens or closes, the air piston moves within the gas cylinder under the drive of the external mounting supports, and synchronously moves the liquid piston via the connecting rod 28. Air in the gas cylinder enters and exits through the gas channel as the air piston moves, while hydraulic oil in the liquid cylinder enters and exits through the liquid channel.

[0043] Specifically, a sealing ring is provided between the liquid channel and the liquid channel hole to ensure the airtightness of the gas cylinder and prevent air leakage. The gas cylinder can be cylindrical; the inner mounting rod and the inner mounting bracket, as well as the outer mounting rod and the outer mounting bracket, can be rotatably connected by fixing pins 34 to ensure that the door can open and close normally; a limit stop is provided at the lower end of the gas cylinder to prevent the gas piston from dislodging from the gas cylinder due to excessive stroke. The length of the connecting rod is consistent with the stroke of the liquid piston, and the stroke ranges of the gas piston and the liquid piston are consistent.

[0044] This invention also provides a control method based on the above-described vehicle door control system, comprising:

[0045] When any infrared receiver fails to receive infrared light, the door controller determines that an obstacle exists between the door and the door frame. It then uses a combined pressure rod to keep the door stationary, preventing it from being pinched. Specifically, the infrared light curtain provides comprehensive obstacle detection with rapid response. Upon detecting an obstacle between the door and the door frame, the infrared receiver quickly transmits a signal to the door controller. The door controller immediately closes the hydraulic cylinder solenoid valve. Since liquid is incompressible, hydraulic oil cannot enter or exit the liquid channel, causing the hydraulic piston to quickly stop moving. Through the action of the connecting rod, the pneumatic piston also stops moving, and all mounting supports also stop moving, thus fixing the door position and preventing further opening and closing, achieving rapid and effective anti-pinch protection.

[0046] Furthermore, the control method also includes: when a person manually controls the opening and closing of the car door, the displacement sensor outputs the position information of the air piston to the door controller. The door controller uses this position information to calculate the door opening angle. When the door opens or closes to the set door limit angle, the door controller controls the cylinder solenoid valve to close, preventing air from entering or exiting the gas passage. This increases the resistance to the movement of the air piston, which is transmitted to the door through the external mounting rod and bracket, thus limiting the door's movement. However, since air can be compressed, the door will not completely lock up. As the person continues to forcefully open and close the door, when the position information of the air piston output by the displacement sensor exceeds the door limit angle, the door controller controls the cylinder solenoid valve to open, allowing air to re-enter and exit the gas passage. The resistance to the movement of the air piston decreases, the door limit effect disappears, and the door can be opened or closed normally. It is understood that both the hydraulic cylinder solenoid valve and the pneumatic cylinder solenoid valve are normally open.

[0047] Specifically, vehicle users can freely configure the door limit angle, and the door controller limits the door at different angles based on the user-configured angle. This solution ensures that the door limit will not fail due to lane slope, wind, or other factors. As the door passes the limit angle, the resistance to opening and closing the door gradually increases and then decreases again, resulting in a good door limit feel and flexible, adjustable limit angle.

[0048] Furthermore, to enable functions such as automatic parking and reversing assistance, vehicles are equipped with a ring of ultrasonic radar around their bodies, which can identify information about obstacles near the vehicle. To enable functions such as blind spot monitoring, millimeter-wave radar is installed on both sides of the vehicle body, which can identify information about pedestrians and vehicles on both sides of the vehicle. The control method also includes: the door controller collects information about the vehicle's surroundings provided by the ultrasonic radar and millimeter-wave radar on the vehicle. When the door is close to a wall or other static object, the controller limits the door opening angle by controlling the hydraulic cylinder solenoid valve according to the distance between the vehicle and the static object, so as to prevent the door from hitting the wall and damaging it or other vehicles.

[0049] Preferably, the control method further includes: when a pedestrian or vehicle is detected passing by at close range outside the door, the door controller closes the hydraulic cylinder solenoid valve to prevent the door from opening and avoid danger; after the vehicle or pedestrian leaves, the hydraulic cylinder solenoid valve is opened again so that the door can resume normal opening and closing; when the vehicle has not come to a complete stop, i.e., the vehicle speed is not 0, the hydraulic cylinder solenoid valve is closed to prevent the door from opening and avoid danger.

[0050] Specifically, the control method also includes: after a vehicle collision and the door locks are automatically unlocked, the door controller controls the hydraulic pump to work, pumping hydraulic oil into the liquid cylinder to actively push open the door, thereby helping the people inside the vehicle to open the door and escape when the door is deformed, or facilitating people outside to open the door and carry out rescue when the people inside the vehicle are unconscious.

[0051] This invention utilizes an infrared transmitter mounted on the car door and an infrared receiver on the door frame to form an infrared light curtain between the door and the door frame, enabling rapid and comprehensive obstacle detection and effectively preventing pinching. A gas cylinder with a built-in liquid cylinder within the pressure rod, with the gas piston and liquid piston working in tandem, ensures normal door opening and closing while locking the door position when needed, effectively preventing pinching. It also features an adjustable door limit angle; the opening and closing resistance changes from low to high and then back to low as the door passes the limit angle, resulting in a smooth opening and closing feel. Through the cooperation of millimeter-wave radar, ultrasonic radar, and the door control system, it effectively prevents collisions with obstacles when opening the door and the risk of passengers exiting before the vehicle has come to a complete stop, improving safety. In case of danger when opening the door, it can lock the door position in time to avoid danger. After a vehicle collision, it can actively open the door to facilitate escape.

[0052] While specific embodiments of the invention have been described in detail by way of examples, those skilled in the art should understand that the examples are for illustrative purposes only and not intended to limit the scope of the invention. Those skilled in the art should understand that modifications can be made to the above embodiments without departing from the scope and spirit of the invention. The scope of the invention is defined by the appended claims.

Claims

1. A vehicle door control system characterized by comprising: It includes a vehicle door controller, an infrared emitter, an infrared receiver, a joint pressure rod, a plurality of infrared emitters are arranged on a ring of the vehicle door for contacting the sealing rubber strip of the vehicle door frame, a plurality of infrared receivers are arranged on the sealing rubber strip of the vehicle door frame, each infrared emitter corresponds to each infrared receiver; the outer end of the joint pressure rod is rotatably connected with the lower part of the vehicle door, and the inner end of the joint pressure rod is rotatably connected with the lower part of the vehicle door frame; the infrared emitter, the infrared receiver and the joint pressure rod are electrically connected with the vehicle door controller respectively; the vehicle door controller controls the joint pressure rod to move according to the information provided by the infrared receiver.

2. The vehicle door control system according to claim 1, characterized by, The infrared emitter emits infrared rays in a fan-shaped wide angle parallel to the ground.

3. The vehicle door control system according to claim 1, characterized by, The lower part of the vehicle door is provided with an outer mounting bracket, the lower part of the vehicle door frame is provided with an inner mounting bracket, the outer end of the joint pressure rod is rotatably connected with the outer mounting bracket, and the inner end of the joint pressure rod is rotatably connected with the inner mounting bracket.

4. The vehicle door control system according to claim 3, characterized by, The joint pressure rod comprises a gas cylinder, a gas passage and a liquid passage hole are arranged on the left side of the gas cylinder, the gas passage is in communication with the inner cavity of the gas cylinder, a gas piston is slidably arranged in the lower part of the gas cylinder, an outer mounting rod for rotatably connecting with the outer mounting bracket is connected to the lower side of the gas piston, an inner mounting rod for rotatably connecting with the inner mounting bracket is arranged on the upper end of the gas cylinder; a liquid cylinder is arranged in the upper part of the gas cylinder, the upper end of the liquid cylinder is integrated with the gas cylinder, the lower end of the liquid cylinder is in communication with the gas cylinder, a liquid piston is slidably arranged in the lower end of the liquid cylinder, the liquid piston is connected with the gas piston through a connecting rod, the liquid piston, the gas piston, the connecting rod, the liquid cylinder and the gas cylinder are coaxial; a liquid passage in communication with the inner cavity of the liquid cylinder is arranged on the left side of the liquid cylinder, and the liquid passage passes through the liquid passage hole; a displacement sensor for detecting the moving stroke of the piston is arranged on the lower side of the gas piston; the gas passage is connected with a gas storage tank through a gas cylinder electromagnetic valve, and the liquid passage is connected with a liquid storage tank through a liquid cylinder electromagnetic valve and a hydraulic pump; the hydraulic pump, the displacement sensor, the gas cylinder electromagnetic valve and the liquid cylinder electromagnetic valve are electrically connected with the vehicle door controller respectively.

5. The vehicle door control system according to claim 4, characterized by, A sealing ring is arranged between the liquid passage and the liquid passage hole.

6. A control method of a vehicle door control system according to claim 1, characterized by, It comprises: When any infrared receiver does not receive infrared rays, the vehicle door controller determines that there is an obstacle between the vehicle door and the vehicle door frame, and controls the vehicle door to keep still through the joint pressure rod to prevent being clamped.

7. The control method according to claim 6, characterized by It further comprises: When the person manually controls the opening and closing of the door, the displacement sensor outputs the position information of the air piston to the door controller, and the door controller calculates the opening angle of the door using the position information. When the door is opened or closed to the set door limit angle, the door controller controls the air cylinder solenoid valve to close, air cannot enter or exit the air passage, so that the moving resistance of the air piston becomes larger, and the resistance is transmitted to the door through the outer mounting support and the outer mounting bracket. Limiting effect on the door, but because the air can be compressed, the door will not be completely stuck, with the person continues to open and close the door, when the displacement sensor output air piston position information beyond the door limit angle, the door controller controls the air cylinder solenoid valve to open, air can re-enter or exit the air passage, the moving resistance of the air piston decreases, the door limiting effect disappears, and the door can be normally opened or closed.

8. The control method according to claim 6, characterized by, It also includes: the door controller collects the information around the vehicle provided by the ultrasonic radar and millimeter wave radar on the vehicle, when the door is close to a static object, according to the distance between the vehicle and the static object, by controlling the liquid cylinder solenoid valve, limiting the opening angle of the door, to avoid collision.

9. The control method according to claim 8, characterized by, It also includes: when detecting that there is a close-range pedestrian or vehicle passing by the outside of the door, the door controller closes the liquid cylinder solenoid valve to prohibit the opening of the door to avoid danger, and opens the liquid cylinder solenoid valve after the vehicle or pedestrian leaves to restore the normal opening and closing of the door; when the vehicle is not stable and the speed is not 0, close the liquid cylinder solenoid valve to prohibit the opening of the door to avoid danger.

10. The control method according to claim 6, characterized by It also includes: when the vehicle collides and the door lock is automatically unlocked, the door controller controls the hydraulic pump to work to pump hydraulic oil into the liquid cylinder to actively open the door.

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