Anti-pinch control method of automobile back door, automobile back door control system and automobile

Abstract

The invention provides an anti-pinch control method of an automobile back door, an automobile back door control system and an automobile. The anti-pinch control method for the automobile back door comprises the steps that the current state of the back door is obtained, and when the back door is in an open state, infrared thermal imaging detection on a door frame area of a trunk is started; and whether a heat source object exists in the door frame area range or not is judged based on the infrared thermal imaging detection condition, and the back door is controlled to execute the closing action only when the heat source object does not exist in the door frame area range. According to the anti-pinch control method for the automobile back door, infrared thermal imaging detection is conducted on the area range surrounded by the door frame of the trunk, the back door is forbidden to execute the closing action under the condition that people exist, and therefore the risk that the back door of the trunk pinches or collides with human body parts in the closing process can be effectively reduced.

Description

Technical Field

[0001] The present invention relates to the field of automobile safety technology, and in particular to an anti-pinch control method for an automobile back door. In addition, the present invention also relates to an automobile back door control system and an automobile. Background Art

[0002] The trunk of a car is located at the rear of the car, and most of them are electric, forming a storage space with the back door for storing and retrieving items, which is convenient for passengers to travel. The back door is usually opened and closed by a pneumatic lift rod; if a passenger is storing or retrieving items in the trunk, and the driver thinks that the passenger has finished storing, then the driver controls to close the back door. At this time, when the back door is closed, the driver does not notice the passenger who has put his hand into the trunk and forces it to close, which can easily pinch the passenger's hand, and the passenger can easily hit the descending back door when raising his head, causing personal injury. In addition, the existing back door anti-pinch system only takes remedial measures when the passenger's hand or head has been pinched or hit, which is very unfriendly to passengers.

[0003] In order to solve the above problems, some existing technologies are based on electric back doors. By using a Hall sensor to detect the change in the rotation speed of the back door drive motor shaft when closing, when the back door is blocked and the motor shaft speed changes, the back door shaft is immediately reversed to protect the safety of personnel. Some technologies arrange anti-pinch rubber strips around the door frame of the back box, and there are electronic components inside the anti-pinch rubber strips. When the back door pinches the hand of the passenger, the electronic components in the anti-pinch rubber strips are triggered to immediately reverse the back door shaft, thereby protecting the safety of personnel.

[0004] Although the various anti-pinch solutions mentioned above can play a certain anti-pinch function, they also have their own shortcomings. Although the Hall sensor can detect the change in speed when the tailgate shaft is closed, when the tailgate shaft speed changes, it has already hit a part of the human body, or the hand has been pinched before remediation, or the tailgate has dropped to a certain height, and the passenger is very likely to hit the head when looking up; therefore, it is still very unfriendly to the passengers. The method of arranging anti-pinch rubber strips around the tailgate door frame can immediately reverse the tailgate shaft when the tailgate pinches the passenger's hand. However, similar to the case of the Hall sensor, the hand or head will still be pinched or hit. Therefore, the above-mentioned existing methods all have the problem of being unfriendly to passengers. Summary of the invention

[0005] In view of this, the present invention aims to provide an anti-pinch control method for a car back door, so as to reduce the risk of the back door of the trunk pinching or bumping against parts of the human body during the closing process.

[0006] To achieve the above object, the technical solution of the present invention is achieved as follows:

[0007] A method for controlling the pinching prevention of a car back door, comprising:

[0008] Acquiring the current state of the back door, and when the back door is in the open state, starting infrared thermal imaging detection of the door frame area of ​​the trunk;

[0009] Based on the infrared thermal imaging detection, it is determined whether there is a heat source object within the door frame area, and only when there is no heat source object within the door frame area, the back door is controlled to execute a closing action.

[0010] Furthermore, it also includes an audible and visual warning, which is issued when the following conditions are met:

[0011] The control unit of the back door receives a command to close the back door;

[0012] There is a heat source object within the door frame area.

[0013] Furthermore, it also includes: when the back door is in an open state, the image information of the infrared thermal imaging is displayed on a display device in the cab at the same time.

[0014] Furthermore, during infrared thermal imaging, the middle position of the top frame of the door frame is used as the camera point, and the camera is taken toward the bottom of the door frame.

[0015] Compared with the prior art, the present invention has the following advantages:

[0016] The anti-pinch control method of the automobile tailgate of the present invention performs infrared thermal imaging detection on the area surrounded by the door frame of the trunk. When human tissues such as arms and heads enter the area (because human tissues are heat source objects), a clear image can be formed on the infrared thermal imaging. The existing image analysis technology can be used to accurately determine whether there are people in the area of ​​the door frame, and then the tailgate is prohibited from closing if there are people, thereby effectively reducing the risk of the trunk tailgate pinching or bumping into human parts during the closing process.

[0017] In addition, when the tailgate receives a closing command but there is someone in the door frame area, the tailgate needs to be prohibited from closing. In this case, sound and light warnings can be issued to prompt the operator who is closing the tailgate to understand the reason why the tailgate cannot be closed, and to remind people to leave the door frame in time in areas that are easily pinched or hit by the tailgate, which is conducive to the smooth closing of the tailgate.

[0018] Another object of the present invention is to provide a car back door control system, comprising a back door, a driving unit for driving the back door to open and close, and a control unit for controlling the action of the driving unit;

[0019] The automobile tailgate control system further comprises an infrared camera connected to the control unit, the infrared camera being used to perform infrared thermal imaging of the door frame area of ​​the trunk; the control unit determines whether there is a heat source object within the door frame area based on the infrared thermal imaging information of the infrared camera, so as to determine whether to control the tailgate (1) to execute a closing action.

[0020] Furthermore, the infrared camera is disposed in the middle of the top frame of the door frame and is arranged toward the bottom of the door frame.

[0021] Furthermore, the automobile back door control system also includes a buzzer connected to the control unit.

[0022] Furthermore, the buzzer is integrated on the infrared camera.

[0023] Furthermore, the driving unit adopts a pneumatic strut, and the pneumatic strut includes a left pneumatic strut arranged between a left side frame of the door frame and the tailgate, and a right pneumatic strut arranged between a right side frame of the door frame and the tailgate.

[0024] The automobile tailgate control system of the present invention has the technical advantages possessed by the above-mentioned automobile tailgate anti-pinch control method.

[0025] At the same time, an infrared camera is used for infrared thermal imaging, and the vehicle-mounted control system or a separately configured controller is used as a control unit. Based on the existing mature image analysis and processing methods, it can accurately determine whether there are heat source objects such as human tissue within the door frame area, and then use it as a logic signal to prohibit closing of the back door. When there is an external command to control the closing of the back door input to the control unit, but the logic signal to prohibit closing exists in the control unit, the back door closing command may not be responded to, so as to prohibit the back door from executing the closing action, thereby realizing the anti-pinch function of the back door well and effectively reducing the risk of human body parts being pinched or bumped during the closing process of the back door.

[0026] In addition, the present invention also proposes a car, wherein the car is provided with the car back door control system of the present invention, and / or the car back door adopts the car back door anti-pinch control method of the present invention. The car of the present invention has the technical advantages possessed by the above-mentioned car back door control system. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] The accompanying drawings, which constitute part of the present invention, are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention. The directional terms such as front and back, up and down, etc. involved therein are only used to indicate relative positional relationships and do not constitute improper limitations on the present invention. In the accompanying drawings:

[0028] Figure 1 This is a schematic diagram of the overall control logic of the anti-pinch control method for the rear door of an automobile according to the first embodiment of the present invention;

[0029] Figure 2 This is a schematic diagram of the three-dimensional structure of the automobile back door according to the first embodiment of the present invention;

[0030] Figure 3 It is a front view of the automobile back door according to the second embodiment of the present invention;

[0031] Figure 4 It is a side view of the automobile tailgate described in the second embodiment of the present invention.

[0032] Description of reference numerals:

[0033] 1. Tailgate; 10. Pneumatic strut; 101. Left pneumatic strut; 102. Right pneumatic strut;

[0034] 2. Top cover;

[0035] 3. Trunk; 30. Door frame; 300. Top frame; 301. Left side frame; 302. Right side frame;

[0036] 4. Infrared camera; 5. Buzzer; 60. Off button. DETAILED DESCRIPTION

[0037] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments may be combined with each other.

[0038] In the description of the present invention, it should be stated that if there are terms indicating orientation or positional relationship such as "up, down, left, right, front, back, inside, outside", etc., they are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed or operated in a specific orientation, and therefore cannot be understood as limiting the present invention. Taking the automobile described in the present invention as an example, the orientation words such as "up, down, left, right, front, back" used in the embodiments are defined based on the up and down direction (also known as the height direction), the left and right direction (also known as the width direction) and the front and back direction (also known as the length direction) of the vehicle. Specifically, as shown in the drawings, the X direction is the front and back direction of the vehicle, wherein the side to which the arrow points is "front", and the opposite is "back". The Y direction is the left and right direction of the vehicle, wherein the side to which the arrow points is "left", and the opposite is "right". The Z direction is the up and down direction of the vehicle, wherein the side to which the arrow points is "up", and the opposite is "down". “Inside” and “outside” are defined based on the contour of the corresponding components. For example, “inside” and “outside” are defined based on the contour of a vehicle, with the side of the vehicle contour close to the middle of the vehicle being “inside” and the opposite being the case being “outside”.

[0039] In addition, in the description of the present invention, unless otherwise clearly defined, the terms "installed", "connected", "connection", and "connector" should be understood in a broad sense. For example, the connection can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, an indirect connection through an intermediate medium, or a connection between two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood in combination with specific circumstances.

[0040] The present invention will be described in detail below with reference to the accompanying drawings and in conjunction with embodiments.

[0041] Embodiment 1

[0042] This embodiment relates to an anti-pinch control method for a car back door, which can reduce the risk of the back door 1 of the trunk 3 pinching or bumping against human body parts during the closing process; an exemplary overall control logic is as follows: Figure 1 shown.

[0043] In general, the anti-pinch control method of the car back door includes:

[0044] Acquire the current state of the back door 1, and when the back door 1 is in the open state, start infrared thermal imaging detection of the door frame 30 area of ​​the trunk 3;

[0045] Based on the infrared thermal imaging detection, it is determined whether there is a heat source object within the door frame 30 area, and only when there is no heat source object within the door frame 30 area, the tailgate 1 is controlled to execute the closing action.

[0046] Specifically, combined Figure 2 As shown, when the back door 1 is in an open state, when the back door control unit is manipulated and the control unit receives an instruction to close the back door 1, the back door 1 will be driven to close under normal circumstances (i.e., there is no heat source such as human tissue in the area of ​​the door frame 30). However, when the infrared thermal imaging detects that there is a heat source in the area of ​​the door frame 30, the back door 1 is prohibited from closing. The back door control unit can be a closing button 60 located in the cab or on the back door 1, or an operation button set on the vehicle control screen.

[0047] In addition, the anti-pinch control method of this embodiment also includes sound and light warning measures. Specifically, when the control unit of the back door 1 receives a closing command, but at this moment there is a heat source object in the area of ​​the door frame 30 and the back door 1 cannot be closed, a sound and light warning is issued at the rear of the vehicle. When the back door 1 receives a closing command, but at this moment there is someone in the area of ​​the door frame 30, it is necessary to prohibit the back door 1 from executing the closing action; in this case, by issuing a sound and light warning, the operator who closes the back door 1 can be prompted to understand the reason why the back door 1 cannot be closed, and can remind people to leave the area of ​​the door frame 30 that is easily pinched or touched by the back door 1 in time, which is conducive to the smooth execution of the closing action of the back door 1.

[0048] At the same time, the following link can also be set in the above anti-pinch control method: when the back door 1 is in the open state, the image information of the infrared thermal imaging is displayed on the display device in the cab. By timely presenting the thermal infrared image of the door frame 30 on the display device such as the vehicle display screen and the central control screen, it is convenient for the driver to observe and understand the situation of the trunk 3 from the cab, and thereby grasp the timing of controlling the closing of the back door 1 appropriately.

[0049] There are of course many ways to obtain the above-mentioned infrared thermal imaging, for example, an infrared camera 4 can be set on the door frame 30. There are many options for the setting orientation of the infrared camera 4. Preferably, the middle position of the top frame 300 of the door frame 30 is used as the shooting point, and the infrared camera 4 is arranged toward the bottom of the door frame 30 for shooting. The infrared camera 4 and other equipment used for infrared thermal imaging are installed in the middle position of the top frame 300 of the door frame 30 and arranged toward the bottom of the door frame 30, which has a good camera field of view, is conducive to comprehensive monitoring of the presence of personnel in the door frame 30 area, thereby improving the anti-pinch performance of the anti-pinch control method.

[0050] To sum up, the anti-pinch control method of the car tailgate of this embodiment performs infrared thermal imaging detection on the area surrounded by the door frame 30 of the trunk 3. When human tissues such as arms and heads enter the area (because human tissues are heat source objects), a clear image can be formed on the infrared thermal imaging. The existing image analysis technology can be used to accurately determine whether there are people in the area of ​​the door frame 30, and then the tailgate 1 is prohibited from executing the closing action when there are people, thereby effectively reducing the risk of the tailgate 1 of the trunk 3 pinching or bumping into human parts during the closing process.

[0051] Embodiment 2

[0052] The present embodiment relates to a car back door control system, comprising a back door 1, a driving unit for driving the back door 1 to open and close, and a control unit for controlling the action of the driving unit; an exemplary structure of the back door 1 is as follows Figure 3 and Figure 4 shown.

[0053] The car back door control system also includes an infrared camera 4 connected to the control unit, and the infrared camera 4 is used to perform infrared thermal imaging of the door frame 30 area of ​​the trunk 3; the control unit determines whether there is a heat source object within the door frame 30 area according to the infrared thermal imaging information of the infrared camera 4, so as to determine whether to control the back door 1 to execute the closing action. When there is no heat source object within the door frame 30 area, the back door 1 is controlled to execute the closing action; when there is a heat source object within the door frame 30 area, no instruction to control the back door 1 to close is issued.

[0054] Combination Figure 2 As shown in , the door frame 30 of the trunk 3 of this embodiment is formed at the rear of the car, and the door frame 30 includes a top frame 300 located at the rear end of the top cover 2 of the car, a left side frame 301 located at the rear of the left side wall of the car, and a right side frame 302 located at the rear of the right side wall of the car. Preferably, the above-mentioned infrared camera 4 is arranged in the middle of the top frame 300 of the door frame 30 and arranged toward the bottom of the door frame 30. As in the first embodiment, the infrared camera 4 is installed in the middle of the top frame 300 of the door frame 30 and arranged toward the bottom of the door frame 30, which has a good camera field of view and can fully monitor the presence of people in the door frame 30 area, which is conducive to improving the detection effect of the infrared camera 4 and making the anti-pinch performance of the back door 1 more prominent.

[0055] The infrared camera 4 is used for infrared thermal imaging, and the vehicle-mounted control system or a separately configured controller is used as a control unit. Based on the existing mature image analysis and processing methods, it can accurately determine whether there is a heat source object such as human tissue within the door frame 30 area, and then use it as a logic signal for prohibiting the closing of the back door 1. When there is an external command input to control the closing of the back door 1 and the logic signal for prohibiting the closing exists in the control unit, the back door 1 closing command may not be responded to, so as to prohibit the back door 1 from executing the closing action, thereby realizing the anti-pinch function of the back door 1 well and effectively reducing the risk of human body parts being pinched or bumped during the closing process of the back door 1.

[0056] In addition, the car back door control system of this embodiment also includes a buzzer 5 connected to the control unit, and the buzzer 5 is used to emit a warning sound when the control unit receives an instruction to close the back door 1 and determines that there is a heat source object within the door frame 30 area. Preferably, the buzzer 5 of this embodiment is integrated with the infrared camera 4. The use of the buzzer 5 to emit a sound warning is convenient for people who lower their heads to take items from the trunk 3 or put items in the trunk 3 to promptly discover the dangerous situation they are in; and the buzzer 5 has the advantages of stable performance and relatively low purchase cost. And the integration of the buzzer 5 with the infrared camera 4 is convenient for the unified arrangement and installation of the two components.

[0057] Of course, the driving unit can be a motor drive or a pneumatic drive. In this embodiment, the driving unit is a pneumatic strut 10. Specifically, the pneumatic strut 10 of this embodiment includes a left pneumatic strut 101 disposed between the left side frame 301 of the door frame 30 and the back door 1, and a right pneumatic strut 102 disposed between the right side frame 302 of the door frame 30 and the back door 1.

[0058] The pneumatic strut 10 is used as a driving component, which has the characteristics of stable driving performance and good supporting effect on the back door 1 in the open state. At the same time, a pneumatic strut 10 is respectively arranged on the left side surrounding frame 301 and the right side surrounding frame 302 of the door frame 30, and the back door 1 is supported and driven from both the left and right sides, which is more conducive to the force balance of the back door 1 and improves the stability of the opening and closing action of the back door 1.

[0059] Based on the above settings, when the passenger has stored or retrieved items in the trunk 3 and closed the back door 1, he presses the closing button 60, and the infrared camera 4 will scan whether there are heat source objects such as human body parts in the door frame 30 area between the trunk 3 and the back door 1. When a heat source object is detected, a signal is sent to the control unit, and the control unit will control the buzzer 5 to start ringing to warn the passengers and the driver, and cut off the work of the left gas strut 101 and the right gas strut 102, so that the back door 1 cannot be lowered and closed. At the same time, the image content captured by the infrared camera 4 can also be displayed on the vehicle display screen, which is convenient for the driver to observe the situation of the trunk 3; until the passenger leaves the dangerous area near the door frame 30, the infrared camera 4 no longer detects the heat source object, and the control unit normally controls the driving action of the left gas strut 101 and the right gas strut 102, so that the back door 1 is successfully closed.

[0060] Embodiment 3

[0061] The present embodiment relates to a car, which is provided with the car tailgate control system provided in the second embodiment; or, the tailgate 1 of the car adopts the car tailgate anti-pinch control method provided in the first embodiment; or, the car is not only provided with the above-mentioned car tailgate control system, but also the closing action of the tailgate 1 of the car is controlled by the above-mentioned car tailgate anti-pinch control method.

[0062] By installing an infrared camera 4 and a buzzer 5 on the top of the door frame 30 of the trunk 3 of the automobile, when the passenger presses the closing button 60, if a part of the human body is within the door frame 30 area between the trunk 3 and the back door 1, the infrared camera 4 can not only emit a warning sound, but also prohibit the back door 1 from executing the closing action to prevent the arm from being caught or the passenger from bumping his head when raising his head. At the same time, the image content captured by the infrared camera 4 can also be displayed on the vehicle display screen, which is convenient for the driver to observe the situation of the trunk 3. In this way, not only the protection performance of the passengers is improved, but also the passengers' recognition of the automobile product is improved.

[0063] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A method for controlling the pinching of a car's rear door, characterized in that include: Acquiring the current state of the back door (1), and when the back door (1) is in the open state, starting infrared thermal imaging detection of the door frame (30) area of ​​the trunk (3); Based on the infrared thermal imaging detection, it is determined whether there is a heat source object within the area of ​​the door frame (30), and only when there is no heat source object within the area of ​​the door frame (30), the back door (1) is controlled to execute a closing action.

2. The anti-pinch control method for the automobile back door according to claim 1, characterized in that: It also includes an audible and visual warning, which is issued when the following conditions are met: The control unit of the back door (1) receives an instruction to close the back door (1); There is a heat source object within the door frame (30) area.

3. The anti-pinch control method for a car back door according to claim 1, characterized in that: Also includes: When the back door (1) is in an open state, the infrared thermal imaging image information is simultaneously displayed on a display device in the cab.

4. The anti-pinch control method for a car back door according to any one of claims 1 to 3, characterized in that: During infrared thermal imaging, the middle position of the top frame (300) of the door frame (30) is used as the imaging point, and imaging is performed toward the bottom of the door frame (30).

5. A car back door control system, comprising a back door (1), a driving unit for driving the back door (1) to open and close, and a control unit for controlling the action of the driving unit; characterized in that: The automobile back door control system further comprises an infrared camera (4) connected to the control unit, wherein the infrared camera (4) is used to perform infrared thermal imaging of a door frame (30) area of ​​the trunk (3); The control unit determines whether there is a heat source object within the area of ​​the door frame (30) based on the infrared thermal imaging information of the infrared camera (4), so as to determine whether to control the back door (1) to execute a closing action.

6. The automobile back door control system according to claim 5, characterized in that: The infrared camera (4) is disposed in the middle of the top frame (300) of the door frame (30) and is arranged toward the bottom of the door frame (30).

7. The automobile back door control system according to claim 6, characterized in that: The automobile back door control system further comprises a buzzer (5) connected to the control unit.

8. The automobile back door control system according to claim 7, characterized in that: The buzzer (5) is integrated on the infrared camera (4).

9. The automobile back door control system according to claim 5, characterized in that: The driving unit adopts a pneumatic strut (10), and the pneumatic strut (10) comprises a left pneumatic strut (101) arranged between a left side surrounding frame (301) of the door frame (30) and the tailgate (1), and a right pneumatic strut (102) arranged between a right side surrounding frame (302) of the door frame (30) and the tailgate (1).

10. An automobile, characterized in that: The automobile is provided with the automobile tailgate control system according to any one of claims 5 to 9, and / or the automobile tailgate (1) adopts the automobile tailgate anti-pinch control method according to any one of claims 1 to 4.

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