Liveness detection method, automotive domain controller, and automobile

Abstract

The application discloses a living body detection method, an automobile domain controller and an automobile. The detection radar is arranged on a rotatable ceiling screen, the detection area of the detection radar is changed through the rotation of the ceiling screen, the entire in-vehicle space of the automobile can be detected by the single detection radar, and the cost of living body detection of the automobile is reduced. When the automobile is in a power-off and locking state, the detection radar is first controlled to perform preliminary living body detection on the automobile. When the preliminary detection result is that there is a living body feature, the position interval of the living body feature is determined according to the current rotation angle of the ceiling screen, the ceiling screen is then controlled to rotate to a preset angle at which the detection accuracy of the detection radar is best, the detection radar is controlled to perform deep living body detection on the position interval, and a first alarm signal is output when the deep detection result is also that there is a living body feature. Therefore, the accuracy of living body detection of the automobile can be effectively improved, it can be accurately judged whether there is still a person inside the automobile after the automobile is powered off and locked, and the safety of the automobile in the power-off and locking state can be improved.

Description

Technical Field

[0001] The present application relates to the technical field of automobile liveness detection, and in particular to a liveness detection method, an automobile domain controller, and an automobile. Background Art

[0002] In recent years, incidents of children being left behind in cars, endangering their safety, have become commonplace. Currently, liveness detection radars are installed inside cars to detect liveness after the vehicle is locked and unlocked. However, liveness detection radars have a limited detection range, covering only certain areas. Therefore, multiple radars are required to detect liveness in all areas of the car, resulting in higher vehicle costs. Summary of the Invention

[0003] In view of this, the present application provides a liveness detection method, a vehicle domain controller, and a vehicle, which are used to reduce the cost of liveness detection in a vehicle. The technical solution of the present application is as follows:

[0004] According to a first aspect of the present application, there is provided a liveness detection method for an automobile, wherein a rotatable ceiling screen is provided on the inner top of the automobile, and a detection radar is provided on the ceiling screen. The liveness detection method comprises: when the automobile is in a state of electrically locking the automobile, controlling the detection radar to perform a preliminary liveness detection on the automobile; in response to the preliminary detection result indicating the presence of liveness features in the automobile, determining a position interval of the liveness features according to the current rotation angle of the ceiling screen; controlling the ceiling screen to rotate to a preset angle according to the position interval; wherein, when the ceiling screen is at the preset angle, the detection radar has the best liveness detection accuracy for the position interval; in response to the ceiling screen rotating to the preset angle, controlling the detection radar to perform a deep liveness detection on the position interval; and outputting a first alarm signal when the depth detection result indicates the presence of liveness features in the automobile.

[0005] In one embodiment of the present application, the liveness detection method further includes: when the preliminary detection result or the depth detection result is that there is no liveness feature in the car, controlling the ceiling screen to rotate from the current rotation angle in a preset angle step; in response to the ceiling screen completing the rotation in the preset angle step, controlling the detection radar again to perform preliminary liveness detection on the car until the ceiling screen rotates from a closed state to a fully open state or the depth detection result is that there is a liveness feature in the car.

[0006] In one embodiment of the present application, when the ceiling screen rotates from a closed state to a fully open state, the detection range of the detection radar moves from the rear area of ​​the car to the front area of ​​the car.

[0007] In one embodiment of the present application, the liveness detection method further includes: when the preliminary detection result indicates that liveness features exist in the car, outputting a second alarm signal; wherein the second alarm signal is different from the first alarm signal.

[0008] In one embodiment of the present application, the first alarm signal is used to be sent to a mobile terminal paired with the car, so that the mobile terminal generates an alarm message according to the first alarm signal; the second alarm signal is used to control the lighting system of the car to flash an alarm and / or control the buzzer of the car to sound an alarm.

[0009] In one embodiment of the present application, the living body detection method further includes: consulting a correspondence table between the detection range of the detection radar and the rotation angle of the ceiling screen; and determining the preset angle according to the position range currently detected by the detection radar.

[0010] A second aspect of the present application provides an automobile domain controller, comprising: a memory for storing a computer program; and a processor for implementing the above-mentioned liveness detection method when executing the computer program.

[0011] According to a third aspect of the present application, there is provided an automobile, comprising a ceiling screen and an automobile domain controller, wherein the ceiling screen is rotatably disposed on an inner top portion of the automobile, a detection radar is disposed on the ceiling screen, and the automobile domain controller is communicatively connected to the ceiling screen and the detection radar; the automobile domain controller is configured to: when the automobile is in a power-locking state, send a first detection instruction to the detection radar, so that the detection radar performs preliminary liveness detection on the automobile according to the first detection instruction; receive a preliminary detection signal output by the detection radar; when the preliminary detection signal indicates the presence of liveness features and the ceiling screen is rotated to a preset angle, send a second detection instruction to the detection radar, so that the detection radar performs deep liveness detection on the automobile according to the second detection instruction; wherein, when the ceiling screen is at the preset angle, the detection radar has the best liveness detection accuracy for the position interval corresponding to the preset angle; receive a depth detection signal output by the detection radar, and output a first alarm signal when the depth detection signal indicates the presence of liveness features in the automobile.

[0012] In one embodiment of the present application, the ceiling screen is communicatively connected to the detection radar, and the ceiling screen is used to: receive the preliminary detection signal; when the preliminary detection signal indicates the presence of living features, rotate to the preset angle; when rotated to the preset angle, send an indication signal to the vehicle domain controller; the indication signal indicates that the ceiling screen has been rotated to the preset angle; when the preliminary detection signal indicates that there are no living features in the car, the ceiling screen rotates from the current rotation angle in preset angle steps.

[0013] In one embodiment of the present application, the car also includes an on-board T-BOX, which is communicatively connected to the car domain controller. The on-board T-BOX is used to receive the first alarm signal and send the first alarm signal to a mobile terminal paired with the car, so that the mobile terminal generates alarm information according to the first alarm signal.

[0014] In the liveness detection method, automobile domain controller, and automobile of the present application, by setting the detection radar on a rotatable ceiling screen, the detection area of ​​the detection radar can be changed by rotating the ceiling screen, so that a single detection radar can detect the entire interior space of the car, thereby reducing the cost of liveness detection for the car. When the car is in the state of being electrically locked, the detection radar is first controlled to perform a preliminary liveness detection on the car. When the preliminary detection result shows that there are liveness features, the position interval of the liveness features is determined according to the current rotation angle of the ceiling screen. Then, the ceiling screen is controlled to rotate to a preset angle with the best detection accuracy of the detection radar, and the detection radar is controlled to perform a deep liveness detection on the position interval. When the deep detection result also shows that there are liveness features, a first alarm signal is output to remind the owner of the safety of the people in the car. In this way, the accuracy of the car's liveness detection can be effectively improved, and it can be accurately determined whether there are still people inside the car after the car is electrically locked, thereby improving the safety of the car when it is electrically locked. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 Schematic diagram of the process of liveness detection provided in the embodiment of the present application.

[0016] Figure 2 This is a partial flow chart of a liveness detection method provided in another embodiment of the present application.

[0017] Figure 3 It is the detection area of ​​the detection radar when the ceiling screen in the embodiment of the present application is at a partial rotation angle.

[0018] Figure 4 This is a partial flow chart of a liveness detection method provided in another embodiment of the present application.

[0019] Figure 5 This is a module diagram of the automotive domain controller provided in an embodiment of the present application.

[0020] Figure 6 It is a module schematic diagram of the automobile provided in an embodiment of the present application.

[0021] Figure 7 It is a structural diagram of the ceiling screen and detection radar provided in an embodiment of the present application.

[0022] Figure 8 This is a module schematic diagram of a car provided in another embodiment of the present application. DETAILED DESCRIPTION

[0023] It should be noted that, in the embodiments of the present application, "at least one" refers to one or more, and "more than one" refers to two or more than two. "And / or" describes the association relationship of associated objects, indicating that three relationships may exist. For example, A and / or B can mean: A exists alone, A and B exist at the same time, and B exists alone, where A and B can be singular or plural. The terms "first", "second", "third", "fourth", etc. (if any) in the specification, claims and drawings of this application are used to distinguish similar objects, rather than to describe a specific order or sequence.

[0024] It should also be noted that the method disclosed in the embodiments of the present application or the method shown in the flowchart includes one or more steps for implementing the method. Without departing from the scope of the claims, the execution order of multiple steps can be interchanged with each other, and some steps can also be deleted.

[0025] Please refer to Figure 1 , Figure 1 This is a flow chart of a liveness detection method provided in an embodiment of the present application. It is understood that the liveness detection method can be applied to a car, wherein a rotatable ceiling screen is provided on the top of the car interior, and a detection radar is provided on the ceiling screen. The liveness detection method can be executed by the car's controller, or can be executed jointly by multiple controllers in the car, or by a car controller and the ceiling screen. Examples of the car's controller include a car domain controller, a body controller, and the like.

[0026] like Figure 1 As shown, the liveness detection method may include:

[0027] Step S100: When the vehicle is in the power-locking state, the detection radar is controlled to perform preliminary liveness detection on the vehicle.

[0028] Among them, when the car is in the electric lock state, the car domain controller, ceiling screen and detection radar are all in a light sleep state. When the car domain controller enters the light sleep state, it sends a detection command to the detection radar, so that the detection radar sends out a detection wave according to the detection command, and realizes preliminary liveness detection of the car based on the detection wave reflected back to the detection radar.

[0029] Step S200: In response to the preliminary detection result indicating that a living feature exists in the car, a position interval of the living feature is determined according to the current rotation angle of the ceiling screen.

[0030] When the preliminary detection result shows that there are living features in the car, the location range of the living features can be determined based on the current rotation angle of the ceiling screen, the detection range of the detection radar itself, and the detection wave reflected back to the detection radar.

[0031] Step S300: Control the ceiling screen to rotate to a preset angle according to the position range.

[0032] Specifically, the detection radar achieves optimal liveness detection accuracy within a position range when the ceiling screen is at a preset angle. It is understood that a corresponding relationship table can be maintained between the position ranges detected by the detection radar and the rotation angles of the ceiling screen. Each position range has a corresponding rotation angle that optimizes the detection radar's detection accuracy within that position range. Thus, after determining the position range, the preset angle for optimal detection accuracy can be determined based on the corresponding relationship table, and the ceiling screen can be rotated to the preset angle.

[0033] Step S400: In response to the ceiling screen rotating to a preset angle, the detection radar is controlled to perform deep liveness detection on the position interval.

[0034] During the initial liveness detection, the detection radar may not have the best detection accuracy for the location interval where the liveness features are located. Therefore, when confirming the location interval of the liveness features, the ceiling screen is rotated to the preset angle corresponding to the location interval, and the detection radar is controlled again to perform deep liveness detection on the location interval. The location interval is then tested again with better pop-up accuracy to further confirm whether there are liveness features in the location interval.

[0035] Step S500: When the depth detection result indicates that there are living features in the car, a first alarm signal is output.

[0036] When the depth detection result also shows that there are living features, the first alarm signal is output to remind people outside the car or the car owner that there are people in the car, and to pay attention to unlocking the car, thereby preventing people from being forgotten in the car and improving car safety.

[0037] In an embodiment of the present application, by arranging the detection radar on a rotatable ceiling screen, the detection area of ​​the detection radar can be changed by rotating the ceiling screen, so that a single detection radar can detect the entire interior space of the car, thereby reducing the cost of performing liveness detection on the car. When the car is in the state of being electrically locked, the detection radar is first controlled to perform a preliminary liveness detection on the car. When the preliminary detection result shows that there are liveness features, the location interval of the liveness features is determined according to the current rotation angle of the ceiling screen. Then, the ceiling screen is controlled to rotate to a preset angle with the best detection accuracy of the detection radar, and the detection radar is controlled to perform a deep liveness detection on the location interval. When the deep detection result also shows that there are liveness features, a first alarm signal is output to remind the owner of the safety of the people in the car. In this way, the accuracy of the car's liveness detection can be effectively improved, and it can be accurately determined whether there are still people inside the car after the car is electrically locked, thereby improving the safety of the car being electrically locked.

[0038] In some embodiments, as Figure 2As shown, the liveness detection method further includes:

[0039] Step S600: When the preliminary detection result or the depth detection result indicates that there is no living feature in the car, the ceiling screen is controlled to rotate from the current rotation angle to a preset angle step.

[0040] The preset angle step can be predetermined based on the rotatable range of the ceiling screen and the detection range of the detection radar. After the ceiling screen rotates by the preset angle step, the current detection range of the detection radar and the detection range before the rotation may partially overlap.

[0041] Step S700: In response to the ceiling screen completing the rotation in steps of a preset angle, the detection radar is controlled again to perform preliminary liveness detection on the car until the ceiling screen rotates from a closed state to a fully open state or the depth detection result indicates that there are live features in the car.

[0042] The preliminary detection result is that there are no living features in the car, which means that there are no living features in the area detected by the detection radar at this time. Therefore, the ceiling screen is controlled to rotate at a preset angle step. After the rotation, the detection area of ​​the detection radar changes, and then the detection radar performs a preliminary liveness detection on the new location area. If the preliminary detection result is still that there are no living features, it continues to rotate at the preset angle step and performs a preliminary liveness detection on the new location area again. If the preliminary detection result is that there is no living body each time, the ceiling screen can be rotated from the closed state to the fully open state to complete the liveness detection of each area in the car. If the preliminary detection result is that there is a living body, execute steps S200-S500. If the depth detection result is that there is no living body, it is also rotated at the preset angle step to perform liveness detection on the new area. If the depth liveness detection result is that there is a living body, a first alarm signal is issued and the liveness detection of the car is stopped.

[0043] See also Figure 3 , Figure 3 The figure shows the detection area of ​​the radar when the ceiling screen is rotated at a certain angle in the embodiment of the present application. Figure 3 For example, when the car is in the power-off unlocking state, the ceiling screen is first in the off state, and the detection area of ​​the detection radar is Figure 3In area L0, the detection radar performs preliminary liveness detection on area L0. If liveness signatures are detected in area L0, the location interval of the liveness signatures is determined. The ceiling screen rotates to a preset angle corresponding to the location interval, and the detection radar performs depth liveness detection on the location interval. If the depth detection result still indicates liveness signatures, a first alarm signal is output. If no liveness signatures are detected in area L0, or if the depth detection result indicates no liveness signatures, the ceiling screen rotates to the next position in preset angular steps. The detection radar's detection area now becomes area L1 (not shown). The detection radar performs preliminary liveness detection and / or depth liveness detection on area L1. If the preliminary detection result or depth detection result corresponding to area L1 indicates no liveness signatures, the ceiling screen continues to rotate to the next position in preset angular steps, causing the detection radar to perform preliminary liveness detection and depth liveness detection on the next detection area. If no liveness signatures are detected in each area, the process repeats until the ceiling screen is fully rotated. When the ceiling screen is fully rotated, the detection radar's detection area becomes area Ln.

[0044] It can be understood that when the ceiling screen rotates from the closed state to the fully open state, the detection radar's detection range moves from the rear area of ​​the car to the front area of ​​the car. In this way, the detection radar can detect the front area of ​​the car from the rear area of ​​the car, achieving complete liveness detection of the car.

[0045] Of course, in some other embodiments, during the process of the ceiling screen rotating from the closed state to the fully open state, the detection range of the detection radar can also move from the front area of ​​the car to the rear area of ​​the car.

[0046] In some embodiments, the liveness detection method may further include: when the preliminary detection result indicates that there are liveness features in the vehicle, outputting a second alarm signal, wherein the second alarm signal is different from the first alarm signal.

[0047] It can be understood that the first alarm signal is used to be sent to the mobile terminal paired with the car, so that the mobile terminal generates an alarm message according to the first alarm signal. The second alarm signal is used to control the car's external lighting system (such as the turn signal) to flash an alarm and / or control the car's buzzer to sound an alarm. That is, when the detection radar detects the presence of a live feature in the car during the preliminary liveness detection, it controls the car's turn signal to flash or the buzzer to sound an alarm, which can remind the car owner or other people nearby who have not gone far that there is a live feature in the car and to pay attention to safety. When the presence of a live feature in the car is detected during the deep liveness detection, the first alarm signal is output to the mobile terminal associated with the car to remind the user of the mobile terminal that there is a live feature in the car and to pay attention to unlocking the car.

[0048] In some embodiments, as Figure 4As shown, the liveness detection method may further include:

[0049] Step S800: Look up the corresponding relationship table between the detection range of the detection radar and the rotation angle of the ceiling screen.

[0050] It is understood that the correspondence table can be generated during the vehicle testing phase by continuously adjusting the rotation angle of the ceiling screen. This will detect the different rotation angles of the ceiling screen when the detection radar detects a certain position. The intensity of the detection wave generated by the detection radar at each rotation angle will be measured, and the rotation angle at which the detection wave intensity is strongest at that position will be recorded. After recording that position, the ceiling screen will be adjusted to a larger rotation angle, thereby changing the detection radar's detection position. The rotation angle at which the detection wave intensity is strongest at that position will be recorded again. This complete correspondence table will be generated for each rotation of the ceiling screen from a closed position to a fully open position. Specifically, during pre-shipment testing, the rotation angle of the ceiling screen can be adjusted to enable the detection radar to detect, for example, the left rear seat. By adjusting the position of the detection radar, the radar will emit a detection wave after each adjustment, and the magnitude of the reflected energy wave will be measured. The reflected energy wave at each position where the detection radar can detect the left rear seat will be recorded, and the corresponding ceiling screen rotation angle at which the reflected energy wave is strongest will be used as the preset angle for the left rear seat, which will be recorded in the correspondence table. This same method can be used to obtain corresponding preset angles for other spaces in the vehicle and record them in the correspondence table.

[0051] Step S900: Determine a preset angle according to the position interval currently detected by the detection radar.

[0052] According to the correspondence table and the position interval, the ceiling screen angle corresponding to the best detection accuracy of the detection radar in the position interval can be confirmed, and then the preset angle can be determined.

[0053] Specifically, if the reflected energy wave of the detection radar is Q, Q=a log10(R)+b, where R=Tn c, where a, b, and c are proportional parameters, Tn is the motion trajectory of the ceiling screen, and R is the target distance from the detection radar to the target position. The reflected energy wave Q is inversely proportional to the target distance R. The smaller the target distance R, the larger the reflected energy wave Q and the more accurate the detection accuracy.

[0054] Of course, in some embodiments, during the actual liveness detection process of a car, the ceiling screen can be rotated and fine-tuned with an angle step that is smaller than the preset angle step each time a deep liveness detection is performed. Each fine-tuning obtains a reflected energy wave. After multiple fine-tunings, the maximum corresponding rotation angle of the reflected energy wave is obtained, and the correspondence table is updated with the rotation angle.

[0055] See also Figure 5The embodiment of the present application further provides a vehicle domain controller 10, comprising a memory 110 and a processor 120. The memory 110 is used to store computer programs. The processor 120 is used to implement the above-mentioned liveness detection method when executing the computer programs.

[0056] See also Figure 6 The embodiment of the present application also provides a car 100, including a car domain controller 10 and a ceiling screen 20. The ceiling screen 20 is rotatably arranged on the inner top of the car 100. A detection radar 30 is arranged on the ceiling screen 20. The car domain controller 10 is communicatively connected with the ceiling screen 20 and the detection radar 30.

[0057] When the vehicle 100 is in the power-down state, the vehicle domain controller 10 sends a first detection command to the detection radar 30, instructing the detection radar 30 to perform a preliminary liveness detection on the vehicle 100 according to the first detection command. After performing the preliminary liveness detection, the detection radar 30 outputs a preliminary detection signal based on the received reflected energy wave. The vehicle domain controller 10 receives the preliminary detection signal output by the detection radar 30.

[0058] When the preliminary detection signal indicates the presence of liveness and the ceiling screen 20 is rotated to a preset angle, the vehicle domain controller 10 sends a second detection command to the detection radar 30, instructing it to perform deep liveness detection on the vehicle 100 according to the second detection command. The detection radar 30 achieves optimal liveness detection accuracy within the location range when the ceiling screen 20 is at the preset angle. After performing deep liveness detection, the detection radar 30 also outputs a depth detection signal based on the received reflected energy waves.

[0059] The vehicle domain controller 10 receives the depth detection signal output by the detection radar 30 and outputs a first alarm signal when the depth detection signal indicates that there is a living feature in the vehicle 100 .

[0060] See also Figure 7 , Figure 7 FIG. 2 shows a schematic diagram of the structure of the ceiling screen 20 and the detection radar 30 provided in an embodiment of the present application. Figure 7 As shown, the detection radar 30 is embedded in the back shell 21 of the ceiling screen 20. Specifically, the detection radar 30 is embedded on the central axis of the back shell 21 of the ceiling screen 20. For example, the back shell 21 of the ceiling screen 20 is provided with a groove 210, and the detection radar 30 is embedded in the groove 210.

[0061] Of course, in some other embodiments, the detection radar 30 can also be installed at other positions of the ceiling screen 20, for example, on both sides of the back shell 21 of the ceiling screen 20, the top / bottom of the screen, etc. The embodiment of the present application does not limit this. As long as it is set on the ceiling screen 20, its detection area can be changed as the ceiling screen 20 rotates.

[0062] In some embodiments, the ceiling screen 20 is communicatively connected to the detection radar 30, and the ceiling screen 20 is used to receive a preliminary detection signal. When the preliminary detection signal indicates the presence of a living feature, the ceiling screen 20 rotates to a preset angle. When the ceiling screen 20 rotates to the preset angle, the ceiling screen 20 sends an indication signal to the vehicle domain controller 10. The indication signal indicates that the ceiling screen 20 has rotated to the preset angle. When the preliminary detection signal indicates that there is no living feature in the vehicle 100, the ceiling screen 20 rotates from the current rotation angle in a preset angle step. In this way, the rotation of the ceiling screen 20 is achieved.

[0063] Of course, in some other embodiments, only the preliminary detection signal may be sent to the vehicle domain controller 10 , and the vehicle domain controller 10 controls the rotation of the ceiling screen 20 according to the preliminary detection signal.

[0064] like Figure 8 As shown, the vehicle 100 may further include an onboard T-BOX 40, which is communicatively connected to the vehicle domain controller 10. The onboard T-BOX 40 is configured to receive a first alarm signal and transmit the first alarm signal to a mobile terminal 200 paired with the vehicle 100, so that the mobile terminal 200 generates an alarm message based on the first alarm signal. Transmitting the first alarm signal to the mobile terminal 200 via the onboard T-BOX 40 allows the user to promptly learn of the presence of living body features within the vehicle 100, thereby improving safety.

[0065] An embodiment of the present application further provides a computer storage medium storing a computer program. When the computer program is executed by the vehicle domain controller 10, the vehicle domain controller 10 executes the above-mentioned liveness detection method.

[0066] In the above embodiments, all or part of the embodiments can be implemented using software, hardware, firmware, or any combination thereof. When implemented using software, all or part of the embodiments can be implemented in the form of a computer program product. A computer program product includes one or more computer instructions. When the computer program instructions are loaded and executed on a computer, all or part of the processes or functions according to the embodiments of the present application are generated. The computer can be a general-purpose computer, a special-purpose computer, a computer network, or other programmable device. The computer instructions can be stored in a computer storage medium or transmitted via a computer storage medium. The computer instructions can be transmitted from one website, computer, server, or data center to another website, computer, server, or data center via wired (e.g., coaxial cable, optical fiber, digital subscriber line (DSL)) or wireless (e.g., infrared, wireless, microwave, etc.) means. The computer storage medium can be any available medium that can be accessed by a computer or a data storage device such as a server or data center that integrates one or more available media. Available media may be magnetic media (eg, floppy disks, hard disks, tapes), optical media (eg, digital versatile discs (DVDs)), or semiconductor media (eg, solid state disks (SSDs)).

[0067] Those skilled in the art will appreciate that all or part of the processes in the above-described method embodiments can be implemented by instructing the relevant hardware through a computer program. The program can be stored in a computer-readable storage medium. When executed, the program can include the processes of the above-described method embodiments. The aforementioned storage medium includes various media capable of storing program code, such as ROM, RAM, magnetic disks, or optical disks. The technical features of this embodiment and the implementation scheme can be combined in any manner unless they conflict.

[0068] The above embodiments are merely preferred embodiments of the present application and are not intended to limit the scope of the present application. Without departing from the design spirit of the present application, various modifications and improvements made to the technical solutions of the present application by ordinary technicians in this field should fall within the scope of protection determined by the claims of the present application.

Claims

1. A method for detecting a living body, applied to a car, wherein a rotatable ceiling screen is provided on the top of the car, characterized in that: The ceiling screen is provided with a detection radar, and the living body detection method includes: When the vehicle is in the electric lock state, controlling the detection radar to perform preliminary liveness detection on the vehicle; In response to a preliminary detection result indicating that a living feature exists in the vehicle, determining a position interval of the living feature according to a current rotation angle of the ceiling screen; The ceiling screen is controlled to rotate to a preset angle according to the position interval; wherein the detection radar has the best accuracy in detecting living bodies in the position interval when the ceiling screen is at the preset angle; In response to the ceiling screen rotating to the preset angle, controlling the detection radar to perform deep living body detection in the position interval; When the depth detection result indicates that there are living features in the car, a first alarm signal is output.

2. The method for detecting living body according to claim 1, wherein: Also includes: When the preliminary detection result or the depth detection result indicates that there is no living feature in the car, controlling the ceiling screen to rotate from the current rotation angle to a preset angle step size; In response to the ceiling screen completing the rotation in the preset angle step, the detection radar is controlled again to perform preliminary liveness detection on the car until the ceiling screen rotates from a closed state to a fully open state or the depth detection result indicates that there are live features in the car.

3. The living body detection method according to claim 2, wherein: During the process of the ceiling screen rotating from the closed state to the fully open state, the detection range of the detection radar moves from the rear area of ​​the car to the front area of ​​the car.

4. The living body detection method according to any one of claims 1 to 3, characterized in that: Also includes: When the preliminary detection result indicates that there are living features in the car, a second alarm signal is output; wherein the second alarm signal is different from the first alarm signal.

5. The living body detection method according to claim 4, wherein: The first alarm signal is used to be sent to a mobile terminal paired with the car, so that the mobile terminal generates an alarm message according to the first alarm signal; the second alarm signal is used to control the car's lighting system to flash an alarm and / or control the car's buzzer to sound an alarm.

6. The living body detection method according to claim 1, wherein: Also includes: Consulting a table of correspondence between the detection range of the detection radar and the rotation angle of the ceiling screen; The preset angle is determined according to the position interval currently detected by the detection radar.

7. An automotive domain controller, characterized in that: include: memory for storing computer programs; A processor, configured to implement the liveness detection method according to any one of claims 1 to 6 when executing the computer program.

8. An automobile, characterized in that: The system comprises a ceiling screen and a vehicle domain controller. The ceiling screen is rotatably arranged on the inner top of the vehicle. A detection radar is arranged on the ceiling screen. The vehicle domain controller is communicatively connected with the ceiling screen and the detection radar. The vehicle domain controller is used to: When the vehicle is in a power-locked state, sending a first detection instruction to the detection radar, so that the detection radar performs preliminary liveness detection on the vehicle according to the first detection instruction; receiving a preliminary detection signal output by the detection radar; When the preliminary detection signal indicates the presence of a live feature and the ceiling screen is rotated to a preset angle, a second detection instruction is sent to the detection radar, so that the detection radar performs deep liveness detection on the vehicle according to the second detection instruction; wherein, when the ceiling screen is at the preset angle, the detection radar has the best liveness detection accuracy in the position interval corresponding to the preset angle; The device receives a depth detection signal output by the detection radar, and outputs a first alarm signal when the depth detection signal indicates that there is a living feature in the car.

9. The automobile according to claim 8, wherein: The ceiling screen is communicatively connected to the detection radar, and the ceiling screen is used to: receiving the preliminary detection signal; When the preliminary detection signal indicates the presence of a living feature, rotating to the preset angle; When the screen is rotated to the preset angle, an indication signal is sent to the vehicle domain controller; the indication signal indicates that the ceiling screen has been rotated to the preset angle; When the preliminary detection signal indicates that there is no living feature in the car, the ceiling screen rotates from the current rotation angle to a preset angle step.

10. The automobile according to claim 8 or 9, characterized in that: It also includes a vehicle-mounted T-BOX, which is communicatively connected to the vehicle domain controller. The vehicle-mounted T-BOX is used to receive the first alarm signal and send the first alarm signal to a mobile terminal paired with the vehicle, so that the mobile terminal generates alarm information according to the first alarm signal.

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