CN114291034B - Skirting control method and control system for electric tail door of automobile - Google Patents
Skirting control method and control system for electric tail door of automobile Download PDFInfo
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- CN114291034B CN114291034B CN202111675164.0A CN202111675164A CN114291034B CN 114291034 B CN114291034 B CN 114291034B CN 202111675164 A CN202111675164 A CN 202111675164A CN 114291034 B CN114291034 B CN 114291034B
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Abstract
The invention discloses a foot kick control method and a control system of an electric tail gate of an automobile, in particular to the technical field of automobile electronics, and the foot kick control method comprises the steps of a human body position sensing module, a projection device and a human foot action sensing module, wherein the human body position sensing module periodically acquires signals of the distance, the signal intensity and the azimuth angle between a human body and an automobile body under the control of a main control chip, and feeds back the signals to the main control chip; the human body position sensing module judges that the distance between the human body and the vehicle body is a first distance and a second distance; triggering the projection device to project light to the ground to form a sensing area when the first distance is over; triggering the human foot action sensing module to sense and control the human foot action in the periodically scanned sensing area by the main control chip when the distance is the second distance, and feeding back signals to the main control chip and the human body position sensing module; and the human body position sensing module judges that the human foot motion meets the requirement, the electric tail gate is opened, and if not, the human body position sensing module is in a standby state or a scanning state. Effectively avoid the misoperation of opening the electric tail gate.
Description
Technical Field
The application relates to the technical field of automobile electronics, in particular to a kick control method and a kick control system for an automobile electric tail gate.
Background
In recent years, with the popularization of automobiles and gradual improvement of the intelligent degree of automobiles, automobiles with higher configurations such as SUVs and sedans are sequentially provided with electric tail gate products and foot kicking products, and the electric opening and closing of the tail gate are realized in a foot kicking triggering mode, so that the comfort and brand value of users are greatly improved.
However, because the foot kicking products used by the automobile at present are basically arranged in the lower induction area of the automobile rear tail box, the risks of opening the rear tail box by false triggering of automobile washing and running water always exist, and each manufacturer needs to aim at the problem of false triggering to start the automobile rear door when designing the foot kicking products for the automobile, so that a plurality of tests are carried out and use limits are set, and the user experience is influenced.
The technical means adopted for solving the problem of false triggering and opening the rear trunk in the prior art comprises the steps of installing capacitive kicking induction in a reserved clamping groove of a rear bumper of an automobile, configuring two induction antennas or built-in antennas by the capacitive kicking induction, and identifying kicking actions by detecting capacitance changes around the antennas. However, the sensitivity and the installation position of the capacitive kick induction are required to be high, if the sensitivity of the capacitive kick induction is too high, the rear door is triggered to be opened by the conditions of car washing, raining and the like, and the problem of influence on the recognition of the kick is caused by the fact that the sensitivity of the capacitive kick induction is too low; moreover, the capacitive type foot kick induction antenna induction is adopted, and a special bracket is required to be designed for a vehicle type with no reserved clamping groove for the rear bumper of the vehicle, so that the cost expenditure is increased.
Disclosure of Invention
In view of this, the present application aims to provide a kick control method and a control system thereof for an electric tail gate of an automobile, so as to solve the technical problems of easy false triggering and opening of the rear tail gate of the automobile, poor kick induction, high kick system installation cost and the like.
In order to achieve the technical purpose, the application provides a kick control method of an electric tail gate of an automobile, which comprises the following steps:
a human body position sensing module is arranged, signals of the distance, the signal intensity and the azimuth angle between the human body and the vehicle body are regularly obtained under the control of a main control chip, and the signals are fed back to the main control chip;
the human body position sensing module judges that the distance between the human body and the vehicle body is a first distance and a second distance;
when the distance between the human body and the vehicle body is in a first distance, the human body position sensing module outputs a trigger signal to the projection device to trigger the projection device to project light to the ground to form a sensing area;
setting a human foot motion sensing module, when the distance between a human body and a vehicle body is in a second distance, outputting a trigger signal to the human foot motion sensing module by the human body position sensing module, triggering the human foot motion sensing module to sense and periodically scan human foot motions in the sensing area under the control of a main control chip, feeding back the signal to the main control chip and enabling the human body position sensing module to make human foot motion judgment;
and if the human body position sensing module judges that the human foot motion of the sensing area accords with the set motion, sending an instruction to the electric tail gate system to execute the operation of opening the electric tail gate, otherwise, the human body position sensing module is in a standby state or a scanning state.
Further, the human body position sensing module is provided with a transmitting antenna and at least two receiving antennas through an array, calculates and processes the obtained distance, signal intensity and azimuth angle between the human body and the vehicle body, and sends the processed data to the main control chip.
Further, the human foot motion sensing module is provided with a transmitting antenna and a receiving antenna through an array, and the human foot motion sensing module calculates and processes the obtained foot kick speed change rate, signal strength and azimuth angle of the human foot and sends processed data to the human body position sensing module and the main control chip.
Further, the human foot motion sensing module obtains the speed change rate of the foot kick of the human foot and feeds the speed change rate back to the human body position sensing module, and the human body position sensing module compares the speed change rate of the foot kick with set human foot motion data.
Further, the human body position sensing module judges that a first distance value between a human body and a vehicle body is 0.6m-2m.
Further, the human body position sensing module judges that a second distance value between the human body and the vehicle body is 0m-0.5m.
The application also provides a control system is played to foot of electronic tail-gate of car, include: the human body position sensing module, the projection device, the human foot motion sensing module and the main control chip;
the human body position sensing module is respectively connected with the projection device and the human foot motion sensing module;
the main control chip is in communication connection with the human body position sensing module and the human foot motion sensing module;
the human body position sensing module is used for acquiring signals of the distance, the signal intensity and the azimuth angle between a human body and a vehicle body, judging the distance between the human body and the vehicle body as a first distance and a second distance, and is provided with a trigger circuit connected with the electric tail gate system;
the human body position sensing module triggers the projection device to project light to the ground through the trigger circuit to form a sensing area;
the human body position sensing module triggers the human foot motion sensing module to sense human foot motion in the sensing area through a trigger circuit.
Further, the sensing area is a range for detecting human foot motions, the plane shape of the sensing area comprises a circle, a sector or a polygon, and the area of the sensing area is 50cm 2 -500cm 2 。
Further, the human body position sensing module, the human foot motion sensing module and the projection device are respectively arranged at the rear part of the vehicle body;
the human body position sensing module and the human foot motion sensing module are respectively provided with a transmitting antenna and a receiving antenna in an array mode, the transmitting antenna is arranged in the middle, and the receiving antennas are respectively arranged on two sides of the transmitting antenna.
Further, the human body position sensing module is a microwave chip or a millimeter wave chip, and the human foot motion sensing module is a microwave chip or a millimeter wave chip.
According to the technical scheme, the kick control method of the automobile electric tail gate provided by the application can periodically acquire signals of the distance, the signal intensity and the azimuth angle between a human body and a vehicle body by arranging the human body position sensing module under the control of the main control chip, and judge the distance between the human body and the vehicle body as a first distance and a second distance;
the projection device and the foot motion sensing module are further arranged, when a human body is at a first distance, the projection device is started to project a sensing area which is used for sensing the foot motion on the ground, the light projected by the projection device is more convenient for a user to identify the sensing area, the user can conveniently kick without blocking the foot, and meanwhile, the situation that the electric tail gate is opened by misoperation is reduced in a specific sensing area;
when the human body is at the second distance, the human foot motion sensing module is started, the human foot motion in the sensing area can be scanned periodically under the control of the main control chip, the recognition success rate is high, the requirement on the user foot kicking motion is low, and the main control chip and the human body position sensing module are fed back to make human foot motion judgment so as to determine whether to open the electric tail gate;
therefore, the distance judgment according to the human body position sensing module can realize long recognition distance, reduce the damage of the electric tail gate or other obstacles to the user, and effectively avoid the situation of opening the electric tail gate by mistake by mutually supporting and having interaction relationship in functions among the human body position sensing module, the projection device and the human foot action sensing module.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described below, it being obvious that the drawings in the following description are only some embodiments of the present application, and that other drawings may be obtained according to these drawings without inventive faculty for a person skilled in the art.
Fig. 1 is a block flow chart of a kick control method of an electric tail gate of an automobile according to an embodiment of the present application;
fig. 2 is a flowchart of a method for controlling kicking of an electric tail gate of an automobile according to an embodiment of the present application in actual operation;
fig. 3 is a schematic module connection diagram of a kick control system of an electric tail gate of an automobile according to an embodiment of the present application;
fig. 4 is a schematic layout diagram of a receiving antenna and a transmitting antenna provided in an embodiment of the present application;
fig. 5 is a schematic view of a kick provided in an embodiment of the present application.
In the figure:
10. a human body position sensing module; 101. a trigger circuit;
20. a projection device;
30. a human foot motion sensing module;
40. a main control chip;
50. a power module;
60. an electrically powered tailgate system.
Detailed Description
The following description of the embodiments of the present application will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are some, but not all, of the embodiments of the present application. All other embodiments, which can be made by one of ordinary skill in the art without undue burden from the embodiments of the present application, are within the scope of the embodiments of the present application.
In the description of the embodiments of the present application, it should be noted that, directions or positional relationships indicated by terms such as "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., are based on directions or positional relationships shown in the drawings, are merely for convenience of describing the embodiments of the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific direction, be configured and operated in the specific direction, and thus should not be construed as limiting the embodiments of the present application. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the embodiments of the present application, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, interchangeably connected, integrally connected, mechanically connected, electrically connected, directly connected, indirectly connected through an intermediary, or in communication between two elements. The specific meaning of the terms in the embodiments of the present application will be understood by those of ordinary skill in the art in a specific context.
The embodiment of the application discloses a kick control method and a kick control system for an electric tail gate of an automobile.
The automobile electric tail door is used for solving the problem that the existing automobile electric tail door is easy to open due to false triggering, and meanwhile the problem that the induction of the foot kick is insensitive and the installation cost of the foot kick is high is solved.
Fig. 1-2 are a block flow diagram and a flowchart of a kick control method of an electric tail gate of an automobile according to an embodiment of the present application.
According to the technical scheme, the distance between the human body and the vehicle body is planned and divided by setting the human body position sensing module 10 to judge the distance between the user and the vehicle body in the process of approaching the vehicle body, namely, the distance between the human body and the vehicle body is divided into a first distance and a second distance. The distance between the human body and the vehicle body in the embodiment may be the distance between the upper body of the human body and the vehicle body, or the distance between the lower body of the human body and the vehicle body, such as the distance between the leg and the vehicle body; preferably, the distance between the leg and the vehicle body is sensed by the human body position sensing module 10, so that the human body position sensing module 10 can sense and trigger the projection device 20 and the human foot motion sensing module 30 to perform corresponding motions for the legs at different distances.
The following description will be mainly made with reference to the human body position sensing module 10 sensing the distance between the leg and the vehicle body.
Specifically, the human body position sensing module 10 triggers and starts the projection device 20 when the leg is at the first distance, the human body position sensing module 10 triggers and starts the human foot motion sensing module 30 when the leg is at the second distance, then the human body position sensing module 10 feeds back the main control chip 40, and the human body position sensing module 10 triggers the electric tail gate system 60 to control and open the electric tail gate. The aim of opening the electric tail gate of the automobile by controlling the kicking is achieved step by step, and the main control chip 40 is used for controlling the induction and scanning regularly and continuously, so that the normal operation of the system is stabilized, the accidental opening of the electric tail gate is avoided, and the insensitivity of kicking induction is also avoided.
By combining the human body position sensing module 10, the projection device 20 and the human foot motion sensing module 30 to be installed on the same structural shell, the installation cost can be reduced; or the device and the module are installed separately, so that the convenience of installation of the device and the module is improved.
Referring to fig. 1, a block diagram of a flow step according to an embodiment of the present application is shown, where the method includes:
s1, setting a human body position sensing module 10, periodically acquiring signals of distance, signal intensity and azimuth angle between legs and a vehicle body under the control of a main control chip 40, and feeding back the signals to the main control chip 40;
s2, the human body position sensing module 10 judges that the distance between the leg and the vehicle body is a first distance and a second distance;
s3, setting a projection device 20, and when the distance between the leg and the vehicle body is in a first distance, outputting a trigger signal to the projection device 20 by the human body position sensing module 10, and triggering the projection device 20 to project light to the ground to form a sensing area;
s4, setting a human foot motion sensing module 30, when the distance between the leg and the vehicle body is at a second distance, outputting a trigger signal to the human foot motion sensing module 30 by the human body position sensing module 10, triggering the human foot motion in the sensing area to be sensed by the human foot motion sensing module 30 and periodically scanned under the control of the main control chip 40, and feeding back signals to the main control chip 40 and the human body position sensing module 10 to judge the human foot motion;
s5, if the human body position sensing module 10 judges that the human foot motion of the sensing area accords with the set motion, a command is sent to the electric tail gate system 60 to execute the operation of opening the electric tail gate, otherwise, the human body position sensing module 10 is in a standby state or a scanning state.
More specifically, the human body position sensing module 10, the projection device 20 and the human foot motion sensing module 30 of the present embodiment are powered by a power module 50 mounted on the vehicle body, the human body position sensing module 10 and the human foot motion sensing module 30 are respectively connected with the projection device 20 through hard wires, and the projection device 20 at least comprises a projection lamp (such as a high-brightness LED lamp bead). Accordingly, the human body position sensing module 10 controls the projection device 20 to be turned on and off in addition to sensing signals between the legs and the body.
The working principle of the projection lamp is that after the power module 50 (+12v) is powered on the projection lamp, the driving circuit lights the projection lamp according to the set current (LED constant current driving IC), and the projection lamp is turned off after the power module 50 is turned off, and the power module 50 is controlled to be turned on or off when the projection lamp is required to flash.
Referring to fig. 5, of course, the circuit of the projection lamp is a hardware circuit, and the human body position sensing module 10 can control the specific function to achieve the result, when the projection lamp projects light to the ground, a set logo image can be formed. The area size of the logo image is the size of the sensing range, and then a user steps on the logo image, or can kick the user above the logo image according to a set action, so that the user is limited to execute a specific action in a designated area. Therefore, the situation that the user opens the electric tail gate by mistake when walking at ordinary times or when the environment is disturbed is avoided.
The principle of the operation of the human body position sensing module 10 is that the human body position sensing module 10 is configured with a trigger circuit 101, that is, the human body position sensing module 10 is connected with the electric tail gate system 60 or the vehicle external handle switch through a trigger line, and in general, the connection between the human body position sensing module 10 and the electric tail gate system 60 or the vehicle external handle switch can be connected by using an IO mode or an LIN network communication. Accordingly, the human body position sensing module 10 can be started to enter a standby state or a scanning state after being powered by the power supply module 50, and is ready to scan a human body approaching the vehicle body.
When the human body position sensing module 10 scans that the legs enter the first distance, the human body position sensing module 10 starts the projection device 20 to project light on the designated ground, and a sensing area with logo images is displayed on the ground.
When the human body position sensing module 10 scans that the leg part enters the second distance, a user makes a foot kicking action on the sensing area according to the prompt, the human body position sensing module 10 starts the human foot action sensing module 30 to identify the foot kicking action in the sensing area of the logo image, then the human foot action sensing module 30 feeds back signals to the main control chip 40 and the human body position sensing module 10, when the human body position sensing module 10 judges that the foot kicking action accords with the set action, the human body position sensing module 10 sends an instruction to the electric tail gate system 60 to start the electric tail gate, and then the tail gate is closed after the leg part leaves the specified range distance; if the human body position sensing module 10 determines that the kick motion does not conform to the set motion, the human body position sensing module will continue waiting until the kick recognition time is over to enter the standby state.
The principle of the foot motion sensing module 30 is that the foot motion sensing module 30 is configured with a trigger circuit 101, that is, the foot motion sensing module 30 is connected with the main control chip 40 through a trigger line, after the foot motion sensing module 30 scans the foot motion, a signal is fed back to the human body position sensing module 10 and the main control chip 40, and then the human body position sensing module 10 judges the foot motion.
In this way, by arranging a human body position sensing module 10 and under the control of the main control chip 40, signals of the distance, the signal intensity and the azimuth angle between the leg and the vehicle body can be periodically obtained, and the distance between the leg and the vehicle body is judged to be a first distance and a second distance;
the projection device 20 and the human foot action sensing module 30 are further arranged, when the legs are at the first distance, the projection device 20 is started to project a sensing area for sensing human foot actions on the ground, the light projected by the projection device 20 is more convenient for a user to identify the sensing area, the user can conveniently kick without blocking the foot, and meanwhile, the situation that the electric tail gate is opened by misoperation is reduced in the specific sensing area;
when the legs are at the second distance, the human foot motion sensing module 30 is started, the human foot motion in the sensing area can be scanned periodically under the control of the main control chip 40, the recognition success rate is high, the requirement on the user foot kicking motion is low, and the main control chip 40 and the human body position sensing module 10 are fed back to make human foot motion judgment so as to determine whether to open the electric tail gate;
in this way, the distance of the human body position sensing module 10 can be judged, so that the recognition distance is far, the damage of the electric tail gate or other obstacles to the human body can be reduced, and the situation of opening the electric tail gate by mistake can be effectively avoided by mutually supporting and having an interaction relationship in functions among the human body position sensing module 10, the projection device 20 and the human foot motion sensing module 30.
Referring to fig. 4, the human body position sensing module 10 is connected to the main control chip 40 through serial ports, IIC, SPI, etc., and the human body position sensing module 10 has transmitting antennas and receiving antennas, specifically, when the transmitting antennas are set to one, the receiving antennas may be set to two or four, and when the transmitting antennas are set to two, the receiving antennas may be set to two or four, although other combinations are not excluded; wherein, the transmitting antenna is arranged among the plurality of receiving antennas to form an array arrangement relation. The human body position sensing module 10 sends out high-frequency wave lines through the transmitting antennas, data received through the plurality of receiving antennas are calculated, the angle of the legs is estimated through different calculation distances of signal intensities received by the receiving antennas arranged on two sides of the transmitting antennas and deviation of the receiving intensities, a curing program is arranged in the human body position sensing module 10 to calculate the data, so that the obtained distance between the legs and the vehicle body, the obtained signal intensity and the obtained azimuth angle are transmitted to the main control chip 40.
Because the human body position sensing module 10 of this embodiment can obtain the azimuth angle of the user, that is, can determine the specific position of the user standing in the middle or left or right of the rear of the vehicle, the projection device 20 is started to project light when the user approaches to the first distance from the rear of the vehicle. Therefore, when a user walks from the left direction to the right direction of the vehicle or walks from the right direction to the left direction of the rear of the vehicle, the user cannot kick the vehicle to identify, and the human body position sensing module identifies that the sensing area of the leg is the vertical right rear of the vehicle tail, so that the situation that the back door is opened by false triggering when the user walks outside the vehicle at will can be greatly avoided.
Referring to fig. 4, the human foot motion sensing module 30 is connected to the main control chip 40 through serial ports, IIC, SPI, etc., and the human foot motion sensing module 30 has a transmitting antenna and a receiving antenna, and in this embodiment, the transmitting antenna is preferably set to be one, and the corresponding receiving antenna is preferably set to be one, although other combinations are not excluded; the transmit antenna and the receive antenna may also form an array arrangement. The human body position sensing module 10 sends out high-frequency wave lines through a transmitting antenna, data received through a receiving antenna are calculated, the angle of a human foot is estimated through different calculation distances of signal intensity received by the receiving antenna and deviation of receiving intensity, the human foot refers to parts such as soles, a curing program is arranged in the human foot motion sensing module 30 to calculate the data, the obtained speed change rate, the signal intensity and the azimuth angle of the kicking of the human foot are calculated, and the processed data are sent to the human body position sensing module 10 and the main control chip 40.
The human foot motion sensing module 30 of this embodiment can also obtain the azimuth angle of the user, so as to set a smaller azimuth angle, so that the effect that the user can kick the automobile back door in the set sensing area can be achieved by the foot motion, the human foot motion sensing module recognizes that the sensing area of the human foot is the area of the automobile tail obliquely downwards close to the ground, that is, the projection light of the projection device is projected on the ground from the automobile tail obliquely downwards, and thus the situation that the user mistakenly triggers the back door to be opened can be greatly avoided. For the case of a user with a thin foot and a small change rate of the distance of the kicking action, the human foot action sensing module 30 mainly calculates the change rate of the distance scanned, so as to obtain data such as the kicking speed, the change rate of the distance of the kicking action and the like, and judge whether the kicking action accords with the set action range.
Preferably, the foot motion sensing module 30 obtains the foot kicking speed of the foot, the foot motion sensing module 30 feeds back the scanned information to the human body position sensing module 10, the human body position sensing module 10 compares the foot kicking speed change rate with the set foot motion data, and the automobile back door is selectively opened or closed according to the comparison result.
Preferably, the human body position sensing module 10 determines that the first distance between the leg and the vehicle body is 0.6m-2m, for example, when the user approaches from the rear of the vehicle to the range of 1.5m, the human body position sensing module 10 controls the projection device 20 to work, and the projection device 20 projects light to the ground to form a sensing area for the user to kick.
Preferably, the human body position sensing module 10 determines that the second distance between the leg and the body is 0m-0.5m, for example, when the user approaches the front of the sensing area by 0.3 m. The human body position sensing module 10 controls the human foot motion sensing module 30 to work, so that the human foot motion sensing module 30 scans and identifies human foot motions on a sensing area and feeds the human foot motions back to the human body position sensing module 10.
Fig. 3 is a schematic module connection diagram of a kick control system of an electric tail gate of an automobile according to an embodiment of the present application.
A kick control system for an automotive electric tailgate, comprising: the human body position sensing module 10, the projection device 20, the human foot motion sensing module 30 and the main control chip 40; the human body position sensing module 10 is respectively connected with the projection device 20 and the human foot motion sensing module 30; the main control chip 40 is in communication connection with the human body position sensing module 10 and the human foot motion sensing module 30; the human body position sensing module 10 is used for acquiring signals of distance, signal intensity and azimuth angle between the leg and the vehicle body, judging the distance between the leg and the vehicle body as a first distance and a second distance, and the human body position sensing module 10 is provided with a trigger circuit 101 connected with the electric tail gate system 60; the human body position sensing module 10 triggers the projection device 20 to project light to the ground through the trigger circuit 101 to form a sensing area; the human body position sensing module 10 triggers the human foot motion sensing module 30 to sense the human foot motion in the sensing area through the triggering circuit 101.
In this way, by arranging a human body position sensing module 10 and under the control of the main control chip 40, signals of the distance, the signal intensity and the azimuth angle between the leg and the vehicle body can be periodically obtained, and the distance between the leg and the vehicle body is judged to be a first distance and a second distance;
the projection device 20 and the human foot action sensing module 30 are further arranged, when the legs are at the first distance, the projection device 20 is started to project a sensing area for sensing human foot actions on the ground, the light projected by the projection device 20 is more convenient for a user to identify the sensing area, the user can conveniently kick without blocking the foot, and meanwhile, the situation that the electric tail gate is opened by misoperation is reduced in the specific sensing area;
when the legs are at the second distance, the human foot motion sensing module 30 is started, the human foot motion in the sensing area can be scanned periodically under the control of the main control chip 40, the recognition success rate is high, the requirement on the user foot kicking motion is low, and the main control chip 40 and the human body position sensing module 10 are fed back to make human foot motion judgment so as to determine whether to open the electric tail gate;
in this way, the distance of the human body position sensing module 10 can be judged, so that the recognition distance is far, the damage of the electric tail gate or other obstacles to the human body can be reduced, and the situation of opening the electric tail gate by mistake can be effectively avoided by mutually supporting and having an interaction relationship in functions among the human body position sensing module 10, the projection device 20 and the human foot motion sensing module 30.
Preferably, the sensing area projected by the projection device 20 is used as a range for detecting the motion of the human foot, and specifically, the planar shape of the sensing area includes a circle, a sector or a polygon. Aiming at the situation that the back door is opened by the false triggering of a user caused by overlarge area, the embodiment preferably ensures that the area of the sensing area is 50cm 2 -500cm 2 The sensing area is preferably set to be a circular area with the radius of 4cm, 5cm and 6cm according to the actual use condition. Therefore, the area of the sensing area is limited, and the situation that a user triggers to open the automobile back door when walking nearby the automobile can be effectively avoided.
Preferably, the human body position sensing module 10, the human foot motion sensing module 30 and the projection device 20 are respectively arranged at the rear part of the automobile body, and can be specifically arranged on the inner wall of a rear bumper at the rear part of the automobile; the human body position sensing module 10 and the human foot motion sensing module 30 are respectively arranged with a transmitting antenna and a receiving antenna in an array, the transmitting antenna is arranged in the middle, and the plurality of receiving antennas are respectively arranged at two sides of the transmitting antenna. By reasonably arranging the transmitting antenna and the receiving antenna, the human body position sensing module 10 can sense and scan the user in several dimensions of distance, signal intensity and azimuth angle. Therefore, the human body position identification effect with high efficiency and high quality is realized.
Preferably, the human body position sensing module 10 in this embodiment at least includes a microwave chip or a millimeter wave chip, and the human foot motion sensing module 30 includes a microwave chip or a millimeter wave chip, wherein the model of the microwave chip can be selected from TS24GTR12S. The used microwave chip and millimeter wave chip are respectively provided with the transmitting antenna and the receiving antenna, the transmitting antenna and the receiving antenna are arranged in an array mode, data such as distance, distance change, signal intensity deviation and the like are provided for the human body position sensing module 10 and the human foot motion sensing module 30, data calculation is conveniently carried out on human foot motions, and a more accurate judgment result is obtained.
The foregoing describes in detail the method and system for controlling the kick of the electric tail gate of the automobile provided by the present application, and for those skilled in the art, according to the ideas of the embodiments of the present application, the specific implementation and application range will be changed, so the content of the present application should not be construed as limiting the present application.
Claims (6)
1. A kick control method of an electric tail gate of an automobile, comprising:
a human body position sensing module is arranged, signals of the distance, the signal intensity and the azimuth angle between the human body and the vehicle body are regularly obtained under the control of a main control chip, and the signals are fed back to the main control chip;
the human body position sensing module judges that the distance between the human body and the vehicle body is a first distance and a second distance;
when the distance between the human body and the vehicle body is in a first distance, the human body position sensing module outputs a trigger signal to the projection device to trigger the projection device to project light to the ground to form a sensing area;
setting a human foot action induction module, when the distance between a human body and a vehicle body is at a second distance, outputting a trigger signal to the human foot action induction module by the human body position induction module, triggering the human foot action induction module to induct and periodically scan human foot actions in the induction area under the control of a main control chip, calculating and processing the obtained speed change rate, signal intensity and azimuth angle of the human foot kick by the human foot action induction module, feeding back processed data signals to the main control chip and the human body position induction module, and comparing the speed change rate of the human foot kick with set human foot action data by the human body position induction module to make human foot action judgment;
if the human body position sensing module judges that the human foot motion of the sensing area accords with the set motion, sending an instruction to the electric tail gate system to execute the operation of opening the electric tail gate, otherwise, the human body position sensing module is in a standby state or a scanning state;
the human body position sensing module is provided with a transmitting antenna and at least two receiving antennas through an array, calculates the acquired distance, signal strength and azimuth angle between the human body and the vehicle body, and sends the processed data to the main control chip;
the human foot motion sensing module is provided with a transmitting antenna and a receiving antenna through an array;
the human body position sensing module, the human foot motion sensing module and the projection device are respectively arranged at the rear part of the vehicle body; the transmitting antenna is arranged in the middle, and the plurality of receiving antennas are respectively arranged at two sides of the transmitting antenna.
2. The method for controlling the kicking of the electric tail gate of the automobile according to claim 1, wherein the human body position sensing module judges that the first distance between the human body and the automobile body is 0.6m-2m.
3. The method for controlling the kicking of the electric tail gate of the automobile according to claim 1, wherein the human body position sensing module judges that the second distance between the human body and the automobile body is 0m-0.5m.
4. A kick control system for an automotive electric tailgate, comprising: the human body position sensing module, the projection device, the human foot motion sensing module and the main control chip;
the human body position sensing module is respectively connected with the projection device and the human foot motion sensing module;
the main control chip is in communication connection with the human body position sensing module and the human foot motion sensing module;
the human body position sensing module is used for acquiring signals of the distance, the signal intensity and the azimuth angle between the human body and the vehicle body, calculating the distance between the human body and the vehicle body through the difference of the received signal intensities of the human body, and estimating the azimuth angle between the human body and the vehicle body through the deviation of the received signal intensities of the human body; the distance between the human body and the vehicle body is judged to be a first distance and a second distance, and the human body position sensing module is provided with a trigger circuit connected with the electric tail gate system;
the human body position sensing module triggers the projection device to project light to the ground through the trigger circuit to form a sensing area;
the human body position sensing module triggers the human foot motion sensing module to sense human foot motion in the sensing area through a trigger circuit;
the human foot action sensing module calculates and processes the obtained speed change rate, signal intensity and azimuth angle of the human foot kick, and sends processed data to the human body position sensing module and the main control chip;
the human foot action sensing module acquires the speed change rate of the foot kick of the human foot and feeds the speed change rate back to the human body position sensing module, and the human body position sensing module compares the speed change rate of the foot kick with set human foot action data;
the human body position sensing module calculates the acquired distance, signal intensity and azimuth angle between the human body and the vehicle body, and sends the processed data to the main control chip;
the human body position sensing module, the human foot motion sensing module and the projection device are respectively arranged at the rear part of the vehicle body;
the human body position sensing module and the human foot motion sensing module are respectively provided with a transmitting antenna and a receiving antenna in an array mode, the transmitting antenna is arranged in the middle, and the receiving antennas are respectively arranged on two sides of the transmitting antenna.
5. The kick control system of an electric tailgate of an automobile of claim 4, wherein the sensing area is a range of human foot motion detection, a planar shape of the sensing area includes a circle or a sector or a polygon, and an area of the sensing area is 50 cm-500 cm.
6. The kick control system of an electric tail gate of an automobile of claim 4, wherein the human body position sensing module is a microwave chip or a millimeter wave chip, and the human foot motion sensing module is a microwave chip or a millimeter wave chip.
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| CN115419345B (en) * | 2022-10-08 | 2024-06-07 | 奇瑞汽车股份有限公司 | Tail gate control method and vehicle |
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