Vehicle door opening early warning method and system and vehicle

Abstract

The invention discloses a vehicle door opening early warning method and system and a vehicle, and the method comprises the steps: a plurality of UWB signal detectors arranged on a vehicle body detect UWB echo signals at the rear side of the vehicle body in real time, and the UWB echo signals are UWB signals reflected by a standard UWB signal emitted by a UWB signal emitter when the standard UWB signal encounters an object; analyzing the UWB echo signal to obtain a detection signal; the detection signal comprises the distance between a moving object corresponding to the current UWB echo signal and the vehicle body and the movement direction; when it is detected that the vehicle door state of the vehicle body is changed from the locked state to the opened state, if the detection signal represents that a moving object approaches the vehicle body at present and the distance between the moving object and the vehicle body is smaller than a preset threshold value, warning information is output according to the detection signal. According to the method, the distance and the movement direction of the moving object and the vehicle body can be accurately judged, so that accidents caused by improper door opening are remarkably reduced, the driving safety is improved, and the power consumption and the cost are relatively low.

Description

Technical Field

[0001] The present invention relates to the technical field of vehicle safety warning, and in particular to a vehicle door opening warning method, system and vehicle. Background Art

[0002] With the popularization of modern transportation, car safety has received more and more attention. In daily life, when a vehicle stops and the driver or passenger opens the door to get out, they often ignore the situation behind them, which may cause a collision with moving objects approaching from behind (such as pedestrians, bicycles, motorcycles, etc.), causing accidents. For this reason, the vehicle door opening warning system came into being.

[0003] The vehicle door opening warning system mainly refers to the use of sensors to detect moving objects approaching on both sides and rear of the vehicle when the vehicle stops and is about to open the door, so as to prevent collision accidents when opening the door. At present, the door opening warning systems on the market mainly use camera recognition or corner millimeter wave radar technology to sense targets on the side and rear of the vehicle.

[0004] However, existing camera and millimeter-wave radar solutions have certain limitations. These solutions generally have problems such as high cost, high computing power consumption, and high power consumption, resulting in a low market penetration rate of the door opening warning function. This situation means that only some high-end models are equipped with this safety function, and it is difficult for mass consumers to experience the safety and convenience brought by technology. Summary of the invention

[0005] The object of the present invention is to provide a vehicle door opening warning method, system and vehicle which can effectively reduce power consumption and cost.

[0006] In order to achieve the above object, the present invention provides a vehicle door opening warning method, which comprises:

[0007] Based on a plurality of UWB signal detectors arranged on the vehicle body, a UWB echo signal at the rear side of the vehicle body is detected in real time, wherein the UWB echo signal is a UWB signal reflected back by a standard UWB signal emitted by a UWB signal transmitter when it hits an object;

[0008] Analyzing the UWB echo signal to obtain a detection signal;

[0009] The detection signal includes the distance between the moving object corresponding to the current UWB echo signal and the vehicle body and the moving direction;

[0010] When it is detected that the door state of the vehicle body changes from locked to open, if the detection signal represents that a moving object is currently approaching the vehicle body and the distance between the moving object and the vehicle body is less than a preset threshold, a warning message is output according to the detection signal.

[0011] Preferably, the UWB signal detectors are respectively arranged on both sides of the rear of the vehicle body.

[0012] Preferably, the moving object is a living being close to the vehicle body.

[0013] Preferably, the detection signal is generated by analyzing and identifying the tiny motion changes in the UWB echo signal to detect signal components related to the physiological activities of the living body.

[0014] Preferably, the target direction of the moving object causing the change of the UWB signal is determined by the change amount of a plurality of UWB echo signals;

[0015] Generate core detection results based on the UWB echo signal consistent with the target direction;

[0016] generating an auxiliary detection result based on the UWB echo signal deviating from the target direction;

[0017] By analyzing the auxiliary detection results, distinguishing and extracting environmental noise data, so as to obtain an estimate of background noise;

[0018] The core detection result is filtered based on the background noise to obtain the detection signal.

[0019] Preferably, the UWB signal transmitter is arranged on the vehicle body or in a signal base station near the outside of the vehicle body.

[0020] The present invention also provides a vehicle, comprising a vehicle body and a plurality of UWB signal detectors and a controller arranged on the vehicle body, wherein the controller works based on the vehicle door opening warning method according to any one of claims 1 to 6.

[0021] Preferably, it also includes a sound alarm electrically connected to the controller.

[0022] The present invention also provides a vehicle door opening warning system, which comprises:

[0023] one or more processors;

[0024] Memory;

[0025] and one or more programs, wherein the one or more programs are stored in the memory and are configured to be executed by the one or more processors, and the programs include instructions for executing the vehicle door opening warning method as described above.

[0026] The present invention also provides a computer-readable storage medium, which includes a computer program, and the computer program can be executed by a processor to implement the vehicle door opening warning method as described above.

[0027] Compared with the prior art, the vehicle door opening warning method provided by the above technical solution of the present invention uses a UWB signal detector to detect the UWB echo signal at the side and rear of the vehicle body, and generates a detection signal accordingly. When the user opens the door, if a dangerous situation is determined according to the detection signal, a warning signal is issued. It can be seen that the above method can accurately judge the distance and movement direction of the moving object and the vehicle body, thereby significantly reducing the occurrence of accidents caused by improper door opening and improving driving safety. Moreover, the UWB radar signal has higher measurement accuracy and lower hardware requirements. It does not require complex image processing algorithms, so it can reduce the computing power requirements of the processor, thereby effectively reducing power consumption, and is lower in cost than the traditional camera plus millimeter wave radar warning system. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 The figure is a flow chart of the vehicle door opening warning method in an embodiment of the present invention.

[0029] Figure 2 This is a reference diagram of the working status of the vehicle door opening warning method in an embodiment of the present invention. DETAILED DESCRIPTION

[0030] In order to explain the technical content, structural features, achieved objectives and effects of the present invention in detail, the following is a detailed description in conjunction with the implementation methods and the accompanying drawings.

[0031] This embodiment discloses a vehicle door opening warning method for warning of dangerous situations when the vehicle door is opened. For example, when the vehicle door is opened, if there is a pedestrian or bicycle approaching from the side and rear, then according to the warning method, when the door is unlocked, a warning signal can be given to remind the user to check the external situation of the vehicle before deciding whether to open the door, thereby improving the safety performance of the vehicle. Figure 1 The early warning method in this embodiment includes the following steps:

[0032] S1: Based on a number of UWB (ultra-wideband) signal detectors arranged on the vehicle body, the UWB echo signal at the rear side of the vehicle body is detected in real time. The UWB echo signal is a UWB signal reflected back by a standard UWB signal emitted by a UWB signal transmitter when it hits an object;

[0033] S2: Analyze the UWB echo signal to obtain a detection signal;

[0034] The detection signal includes the distance between the moving object and the vehicle body and the moving direction corresponding to the current UWB echo signal;

[0035] S3: When it is detected that the door state of the vehicle changes from locked to open, if the detection signal represents that a moving object is currently approaching the vehicle and the distance between the moving object and the vehicle is less than a preset threshold, a warning message is output according to the detection signal.

[0036] It should be noted that the UWB signal detector and the UWB signal transmitter constitute a UWB radar system. Unlike the traditional UWB ranging system, the UWB radar system does not require a UWB tag to be configured on the target object. Therefore, any object around the vehicle can be detected.

[0037] Specifically, a car, such as Figure 2 , a number of UWB signal detectors are installed on the vehicle body to monitor the environmental conditions behind the vehicle body in real time. Then, the execution process of the above warning method is as follows:

[0038] 1. UWB signal detection:

[0039] The UWB signal detector installed on the rear side of the vehicle body continuously receives the UWB echo signal.

[0040] For example, when a bicycle approaches a parked car from behind, the UWB signal detector will receive the UWB echo signal reflected back from the bicycle and the person on the bicycle.

[0041] 2. Signal analysis:

[0042] The received UWB echo signal is analyzed to obtain a detection signal, which includes the distance and movement direction between the current reflecting object (bicycle) and the vehicle body.

[0043] Assume that a bicycle is detected to be 5 meters away from the vehicle body and is approaching the vehicle body.

[0044] 3. Door status detection:

[0045] Real-time detection of the door status. When the door status changes from locked to open, further detection is triggered.

[0046] For example, when the driver is about to open the door to get out of the car, the door status changes to open.

[0047] 4. Early warning judgment and output:

[0048] The detection signal is checked, and if a moving object (bicycle) is detected approaching the vehicle body and the distance is less than a preset safety threshold (eg, 2 meters), a warning message is issued.

[0049] In this example, the bicycle is 5 meters away from the vehicle and is approaching. Assuming that the set warning threshold is 2 meters, the current detection signal shows that the bicycle is approaching but has not reached the warning threshold, so no warning is issued for the time being.

[0050] Continue monitoring, and if the bicycle continues to approach and enters the 2-meter range, the system will immediately issue a warning message, such as an alarm sounding in the car or a prompt on the rearview mirror display: "Attention: There is an object approaching."

[0051] It can be seen that the above-mentioned vehicle door opening warning method can accurately judge the distance and movement direction of the moving object and the vehicle body, thereby significantly reducing the occurrence of accidents caused by improper door opening and improving driving safety. Moreover, UWB radar signals have higher measurement accuracy and lower hardware requirements. They do not require complex image processing algorithms, so they can reduce the computing power requirements of the processor, thereby reducing power consumption. Moreover, compared with the traditional camera plus millimeter wave radar warning system, it is lower in cost.

[0052] Conventional vehicle door opening accidents usually collide with human bodies, bicycles or electric bicycles. For other vehicles where human bodies cannot be seen, collisions with vehicle doors rarely occur because they are more obvious on the rearview mirror. Therefore, the moving object corresponding to the UWB echo signal in this embodiment is a living body, which can not only warn pedestrians, bicycles and electric bicycles approaching the vehicle from behind, but also further reduce the amount of calculation of the UWB echo signal, and only need to detect the living body.

[0053] Furthermore, signal components related to physiological activities (such as breathing movements) of a living body are detected by analyzing and identifying minute motion changes in the UWB echo signal to generate a detection signal.

[0054] On the other hand, in order to improve the accuracy of UWB echo signal processing and avoid the influence of environmental noise data on it, the processing method of UWB echo signal is as follows:

[0055] 1. Determine the target direction of the moving object that causes the UWB signal change by the change amount of several UWB echo signals;

[0056] 2. Generate core detection results based on the UWB echo signal consistent with the target direction;

[0057] 3. Generate auxiliary detection results based on UWB echo signals that deviate from the target direction;

[0058] 4. By analyzing the auxiliary detection results, distinguish and extract the environmental noise data to obtain an estimate of the background noise;

[0059] 5. Filter the core detection results based on the background noise to obtain the detection signal.

[0060] In this embodiment, by estimating the background noise level and filtering the core detection data, noise interference can be effectively eliminated, thereby improving the accuracy of the detection signal, which not only reduces the false alarm rate, but also improves the reliability of the warning system, providing the driver with more timely and accurate collision warnings, enhancing vehicle safety performance, and reducing the risk of traffic accidents.

[0061] On the other hand, UWB signal detectors are respectively arranged on both sides of the rear of the vehicle body to detect the situation behind the left and right sides of the vehicle respectively.

[0062] On the other hand, the UWB signal transmitter is arranged on the vehicle body or in a signal base station near the outside of the vehicle body.

[0063] In another preferred embodiment of the present invention, a vehicle is disclosed, including a vehicle body and a plurality of UWB signal detectors and a controller arranged on the vehicle body, wherein the controller works based on the vehicle door opening warning method in the above embodiment.

[0064] On the other hand, the vehicle is also provided with a sound alarm electrically connected to the controller, through which the warning information is output.

[0065] The present invention also discloses a vehicle door opening warning system, which includes one or more processors, a memory and one or more programs, wherein the one or more programs are stored in the memory and are configured to be executed by the one or more processors, and the program includes instructions for executing the vehicle door opening warning method as described above. The processor can adopt a general central processing unit (CPU), a microprocessor, an application specific integrated circuit (ASIC), or one or more integrated circuits, which are used to execute relevant programs to realize the functions required to be executed by the module in the vehicle door opening warning system of the embodiment of the present application, or to execute the vehicle door opening warning method of the method embodiment of the present application.

[0066] The present invention also discloses a computer-readable storage medium, which includes a computer program, and the computer program can be executed by a processor to complete the vehicle door opening warning method as described above. The computer-readable storage medium can be any available medium that can be accessed by a computer or a data storage device such as a server or a data center that includes one or more available media integrated. The available medium can be a read-only memory (ROM), or a random access memory (RAM), or a magnetic medium, such as a floppy disk, a hard disk, a tape, a magnetic disk, or an optical medium, such as a digital versatile disc (DVD), or a semiconductor medium, such as a solid state disk (SSD), etc.

[0067] The present application also discloses a computer program product or a computer program, which includes a computer instruction stored in a computer-readable storage medium. A processor of an electronic device reads the computer instruction from the computer-readable storage medium, and the processor executes the computer instruction, so that the electronic device executes the above-mentioned vehicle door opening warning method.

[0068] The above disclosure is only the preferred embodiment of the present invention, which certainly cannot be used to limit the scope of rights of the present invention. Therefore, equivalent changes made according to the scope of the patent application of the present invention are still within the scope covered by the present invention.

Claims

1. A vehicle door opening warning method, characterized in that: include: Based on a plurality of UWB signal detectors arranged on the vehicle body, a UWB echo signal at the rear side of the vehicle body is detected in real time, wherein the UWB echo signal is a UWB signal reflected back by a standard UWB signal emitted by a UWB signal transmitter when it hits an object; Analyzing the UWB echo signal to obtain a detection signal; The detection signal includes the distance between the moving object corresponding to the current UWB echo signal and the vehicle body and the moving direction; When it is detected that the door state of the vehicle body changes from locked to open, if the detection signal represents that a moving object is currently approaching the vehicle body and the distance between the moving object and the vehicle body is less than a preset threshold, a warning message is output according to the detection signal.

2. The vehicle door opening warning method according to claim 1, characterized in that: The UWB signal detectors are respectively arranged on both sides of the rear of the vehicle body.

3. The vehicle door opening warning method according to claim 1, characterized in that: The moving object is a living being close to the vehicle body.

4. The vehicle door opening warning method according to claim 3, characterized in that: The detection signal is generated by analyzing and identifying the small motion changes in the UWB echo signal to detect the signal components related to the physiological activities of the living body.

5. The vehicle door opening warning method according to claim 1, characterized in that: The target direction of the moving object causing the change of the UWB signal is determined by the change of several UWB echo signals; Generate core detection results based on the UWB echo signal consistent with the target direction; generating an auxiliary detection result based on the UWB echo signal deviating from the target direction; By analyzing the auxiliary detection results, distinguishing and extracting environmental noise data, so as to obtain an estimate of background noise; The core detection result is filtered based on the background noise to obtain the detection signal.

6. The vehicle door opening warning method according to claim 1, characterized in that: The UWB signal transmitter is arranged on the vehicle body or in a signal base station near the outside of the vehicle body.

7. A vehicle, characterized in that: It comprises a vehicle body and a plurality of UWB signal detectors and a controller arranged on the vehicle body, wherein the controller works based on the vehicle door opening warning method according to any one of claims 1 to 6.

8. The vehicle according to claim 7, characterized in that Also included is a sound alarm electrically connected to the controller.

9. A vehicle door opening warning system, characterized in that: include: one or more processors; Memory; and one or more programs, wherein the one or more programs are stored in the memory and are configured to be executed by the one or more processors, the programs including instructions for executing the vehicle door opening warning method as described in any one of claims 1 to 6.

10. A computer-readable storage medium, characterized in that: It comprises a computer program which can be executed by a processor to complete the vehicle door opening warning method as described in any one of claims 1 to 6.

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