Vehicle monitoring system based on UWB signal and vehicle

Abstract

The invention discloses a vehicle monitoring system based on a UWB signal and a vehicle, and the system comprises at least one UWB signal detector which is disposed on a vehicle body and is used for transmitting and receiving a UWB radio frequency signal; the UWB signal processor is used for analyzing the received UWB radio-frequency signal so as to obtain monitoring data reflecting the condition of the target object; the vehicle video monitoring system comprises at least one video recording system; and the system controller is in communication connection with the UWB signal processor and the video recording system, and the system controller is used for generating a control signal according to the monitoring data so as to control the video recording system to be in a working or dormant state. The vehicle monitoring system can automatically control the starting or dormancy of the video recording system according to the condition of the target object around the vehicle, the power consumption of the system can be greatly reduced, the cruising ability of the vehicle is improved, meanwhile, it is ensured that key image information can be captured at a key moment, and organic combination of high efficiency, intelligence and practicability is achieved.

Description

Technical Field

[0001] The present invention relates to the field of vehicle-mounted monitoring technology, and in particular to a vehicle monitoring system and a vehicle based on UWB signals. Background Art

[0002] With the continuous development of automobile safety and monitoring technology, vehicle-mounted video monitoring systems have gradually been applied to the automotive field. Its core function is to record the surrounding conditions of the vehicle through the video system (including cameras and recorders) arranged on the vehicle body. These devices are usually kept on continuously so that when the vehicle collides, scratches or is stolen, it can capture and save the surrounding image data in time to assist in event tracking. However, the continuous operation of the video system will result in higher power consumption. For fuel vehicles, this power consumption level may significantly affect fuel consumption; for electric vehicles, it will also seriously shorten the driving range. In addition, since the monitoring system needs to record continuously, even when no abnormal situation occurs, a large amount of invalid monitoring data will still be generated, wasting storage space and bandwidth resources. Summary of the invention

[0003] The purpose of the present invention is to provide a low-power, high-efficiency vehicle monitoring system based on UWB signals and a vehicle.

[0004] In order to achieve the above object, the present invention provides a vehicle monitoring system based on UWB signals, which includes:

[0005] At least one UWB signal detector, which is arranged on the vehicle body and is used to transmit and receive UWB radio frequency signals;

[0006] A UWB signal processor analyzes the received UWB radio frequency signal to obtain monitoring data reflecting the status of the target object;

[0007] A vehicle video surveillance system, including at least one video recording system;

[0008] A system controller is communicatively connected with the UWB signal processor and the video recording system, and is used for generating a control signal according to the monitoring data to control the video recording system to be in a working state or a dormant state.

[0009] Preferably, the monitoring data at least includes data reflecting the distance between the target object and the vehicle body and the state of the target object.

[0010] Preferably, when the video recording system is in working state, the video recording system captures and saves the images around the vehicle body; when the video recording system is in dormant state, the power supply channel of the video recording system is disconnected.

[0011] Preferably, when the target object enters the first warning area, if the target object stays in the first warning area for longer than a first time threshold, the control signal instructs the video recording system to start, so that the video recording system is in a working state; in the first warning area, the distance between the target object and the vehicle body is less than or equal to a first distance threshold.

[0012] Preferably, when the target object stays in the first warning area for a period exceeding a second time threshold and the distance between the target object and the vehicle body remains unchanged, the control signal instructs the video recording system to shut down, so that the video recording system is in a dormant state; the second time threshold is greater than the first time threshold.

[0013] Preferably, there are at least five UWB signal transmitters.

[0014] Preferably, a plurality of the UWB signal detectors are respectively arranged around the vehicle body.

[0015] Preferably, the UWB signal detector may be arranged inside or outside the vehicle body.

[0016] Preferably, the system controller generates the control signal based on at least two sets of monitoring data generated previously.

[0017] The present invention also provides a vehicle, which comprises a vehicle body and the above-mentioned vehicle monitoring system arranged on the vehicle body.

[0018] Compared with the prior art, the vehicle monitoring system provided by the above technical solution of the present invention includes a UWB signal detector arranged on a vehicle body, through which a UWB radio frequency signal is transmitted and received in real time, and monitoring data of the detected target state is obtained by processing the received UWB radio frequency signal reflected by the target object, and a corresponding control signal is generated based on the monitoring data to control the working state of the video recording system, so that the video recording system on the vehicle can be adaptively started or dormant according to the state of nearby targets, that is, when the target object has no effect on the vehicle, the video recording system can be turned off, and when the target object may have an effect on the vehicle, the video recording system is automatically started; it can be seen that the above vehicle monitoring system can greatly reduce system power consumption and improve vehicle endurance, while ensuring that key image information can be captured at critical moments, thereby realizing an organic combination of high efficiency, intelligence and practicality. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 FIG. 4 is a schematic diagram of a vehicle with a vehicle monitoring system according to an embodiment of the present invention.

[0020] Figure 2 Schematic diagram of the vehicle monitoring system in an embodiment of the present invention. DETAILED DESCRIPTION

[0021] 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.

[0022] This embodiment discloses a vehicle monitoring system based on UWB signals, which is used to dynamically monitor the surrounding conditions of the vehicle. Figure 1 and Figure 2 The vehicle monitoring system includes at least one UWB signal detector 1, a UWB signal processor 2, a vehicle video monitoring system and a system controller 3.

[0023] The UWB signal detector 1 is arranged on the vehicle body. The UWB signal detector 1 is a radar sensor for transmitting and receiving UWB radio frequency signals. When the UWB radio frequency signal emitted by the UWB signal detector 1 is projected onto the target object around the vehicle body, an echo signal is returned and received by the UWB signal detector 1.

[0024] The UWB signal processor 2 analyzes the received UWB radio frequency signal (ie, the echo signal) to obtain monitoring data reflecting the status of the target object.

[0025] The vehicle video monitoring system includes at least one video recording system 4 arranged in the vehicle body, and the video recording system 4 is used to capture images around the vehicle body through a camera and store the captured images.

[0026] The system controller 3 is in communication connection with the UWB signal processor 2 and the video recording system 4 . The system controller 3 is used to generate a control signal according to the monitoring data to control the video recording system 4 to be in a working state or a dormant state.

[0027] Specifically, when the video recording system 4 is in working state, the video recording system 4 captures and saves the images around the vehicle body. When the video recording system 4 is in dormant state, the power channel can be kept connected, consuming very low power, or the power channel of the video recording system 4 can be disconnected.

[0028] Based on the above vehicle monitoring system, when the UWB signal detector 1 does not detect any abnormality, the video recording system 4 remains dormant, which significantly reduces power consumption. Once an abnormal approach is detected, the video recording system 4 can be started in real time to ensure that key images can be captured at critical moments, reduce unnecessary recordings, save storage space, and improve monitoring efficiency. For electric vehicles, the endurance is greatly improved, and for fuel vehicles, the battery burden is reduced, providing real-time and effective monitoring.

[0029] On the other hand, the monitoring data at least includes data reflecting the distance between the target object and the vehicle body and the state of the target object. Specifically, the state of the target object includes the motion state of the target object, for example, the target object is in a stationary state or a moving state. When in a moving state, the monitoring data includes the moving speed and direction relative to the vehicle body. In addition, the state of the target object may also include the category of the target object, such as pedestrians, vehicles, animals, etc.

[0030] It should be noted that, for the UWB signal detector 1, the following different analysis methods can be used to obtain monitoring data.

[0031] Analysis method 1 is as follows:

[0032] When analyzing the changes in the received UWB RF signal, the received UWB RF signal can be decomposed into multiple channel signals due to its wideband characteristics. Different targets have different reflection and absorption characteristics for UWB RF signals, and these differences will be reflected in the signals of each channel.

[0033] In order to accurately distinguish the type of moving objects, the following methods can be used:

[0034] 1. Establish a channel feature database: By measuring and analyzing the UWB RF signal responses of various known targets, a corresponding channel feature database is established. These features include but are not limited to signal reflection intensity, attenuation, multipath effect, etc.

[0035] 2. Target classification: For mechanical moving objects, such as remote-controlled cars, their surface material and shape may cause obvious reflection peaks on certain specific channels. This is because their surfaces tend to reflect UWB RF signals at specific angles.

[0036] For a moving human body, due to its unique biological characteristics, such as water content and non-uniformity of muscle tissue, it will cause greater signal attenuation on specific channels of UWB RF signals, which is different from the signal characteristics generated by mechanical objects.

[0037] 3. Signal processing and analysis: By comparing the real-time received UWB RF signal with the channel characteristics in the database, the type of moving object can be identified. For example, if a strong reflected signal is detected on some channels, while the signal attenuation is significant on other channels, this may indicate that the target is a moving mechanical object.

[0038] 4. Multi-parameter comprehensive judgment: In addition to channel characteristics, other parameters can also be combined, such as the multipath components of the signal, arrival time difference, signal phase and other information, for more accurate target identification.

[0039] Through this comprehensive analysis method, the type of moving objects can be accurately identified, thereby improving the recognition ability and practicality of vehicle-mounted monitoring.

[0040] The second analysis method is as follows:

[0041] The target's movement characteristics can be analyzed by monitoring the continuous changes of the UWB radio frequency signal. Since the movement of the target will cause the returned UWB radio frequency signal to fluctuate accordingly over time, these continuous signal changes can be used to infer the target's movement characteristics. The specific analysis steps are as follows:

[0042] 1. Signal timing analysis: collect a series of UWB RF signals received in a continuous time and analyze their changing trends over time;

[0043] 2. Mobile feature extraction. The movement of the target will cause the following changes in the UWB RF signal:

[0044] Phase change of the signal: The movement of the target will cause the phase of the signal to change. By monitoring these phase changes, the movement trajectory of the target can be inferred;

[0045] Changes in multipath effects: Moving objects will cause changes in the multipath components of the signal. These changes reflect the position and speed of the object relative to the UWB signal detector 1.

[0046] Signal strength fluctuation: Changes in the target’s volume and movement speed will affect the signal’s reflection intensity and attenuation rate.

[0047] 3. Mobile parameter estimation:

[0048] Volume estimation: The volume of the target object can be estimated based on the reflection intensity and multipath effect of the received UWB radio frequency signal.

[0049] Speed ​​calculation: By analyzing the phase change of the received UWB RF signal and the moving speed of the multipath component, the moving speed of the target object can be calculated.

[0050] 4. Dynamic model establishment: Combined with the volume and speed information of the target, a dynamic model of the target can be established to further analyze the target's movement trajectory and possible movement intentions.

[0051] This analysis method can not only identify the target's movement characteristics, such as volume and speed, but also provide a deeper understanding of the target's dynamic behavior, thereby providing more accurate target tracking and evaluation capabilities for vehicle-mounted monitoring.

[0052] On the other hand, in order to avoid false triggering caused by occasional interference signals, the system controller 3 generates a control signal based on at least two sets of monitoring data generated before and after. Specifically, the current monitoring data and another monitoring data of the adjacent previous cycle in the time series are taken, and the two monitoring data are averaged, and the control signal is generated according to the average calculation result.

[0053] On the other hand, when the target enters the preset first warning area Q, if the target's stay time in the first warning area Q exceeds the first time threshold, the control signal instructs the video recording system 4 to start, so that the video recording system 4 is in a working state; in the first warning area Q, the distance between the target and the vehicle body is less than or equal to the first distance threshold.

[0054] In this embodiment, in the first warning area Q, the distance between the target object and the vehicle body is less than or equal to the first distance threshold, for example, the first distance threshold is 10 meters, and the first time threshold is 5 seconds. Then, when the target object (such as a humanoid creature) is detected to enter the range of 10 meters of the vehicle body and stays for more than 5 seconds, the recording system 4 is activated.

[0055] Furthermore, when the target object stays in the first warning area Q for a period exceeding the second time threshold and the distance between the target object and the vehicle body remains unchanged, the control signal instructs the video recording system 4 to shut down, so that the video recording system 4 is in a dormant state; the second time threshold is greater than the first time threshold. Specifically, when the first time threshold is 5s, the second time threshold can be set to 60s. In this embodiment, when the target object stays in the first warning area Q for a long time and does not move, it is highly unlikely to affect the vehicle. Therefore, there is no need to keep the video recording system 4 in a working state for a long time to achieve the purpose of saving power.

[0056] On the other hand, there are at least five UWB signal transmitters. Moreover, in order to achieve an ideal all-round monitoring effect, a number of UWB signal detectors 1 are respectively arranged around the vehicle body. Figure 1 The five UWB signal transmitters are respectively arranged one on each side of the front of the vehicle, one on each side of the rear of the vehicle, and one in the middle of the roof.

[0057] On the other hand, the UWB signal detector 1 can be arranged inside or outside the vehicle body.

[0058] In another preferred embodiment of the present invention, a vehicle is also disclosed. The vehicle includes a vehicle body and a vehicle monitoring system as described in the above embodiment and arranged on the vehicle body.

[0059] 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 monitoring system based on UWB signals, characterized in that: include: At least one UWB signal detector, which is arranged on the vehicle body and is used to transmit and receive UWB radio frequency signals; A UWB signal processor analyzes the received UWB radio frequency signal to obtain monitoring data reflecting the status of the target object; A vehicle video surveillance system, including at least one video recording system; A system controller is communicatively connected with the UWB signal processor and the video recording system, and is used for generating a control signal according to the monitoring data to control the video recording system to be in a working state or a dormant state.

2. The vehicle monitoring system according to claim 1, characterized in that: The monitoring data at least includes data reflecting the distance between the target object and the vehicle body and the state of the target object.

3. The vehicle monitoring system according to claim 1, characterized in that: When the video recording system is in working state, the video recording system captures and saves the images around the vehicle body; when the video recording system is in dormant state, the power supply channel of the video recording system is disconnected.

4. The vehicle monitoring system according to claim 2, characterized in that: When the target object enters the first warning area, if the target object stays in the first warning area for longer than a first time threshold, the control signal instructs the video recording system to start, so that the video recording system is in a working state; in the first warning area, the distance between the target object and the vehicle body is less than or equal to a first distance threshold.

5. The vehicle monitoring system according to claim 4, characterized in that: When the target object stays in the first warning area for a period exceeding a second time threshold and the distance between the target object and the vehicle body remains unchanged, the control signal instructs the video recording system to shut down, so that the video recording system is in a dormant state; the second time threshold is greater than the first time threshold.

6. The vehicle monitoring system according to claim 1, characterized in that: The number of the UWB signal transmitters is at least five.

7. The vehicle monitoring system according to claim 6, characterized in that: A plurality of UWB signal detectors are respectively arranged around the vehicle body.

8. The vehicle monitoring system according to claim 1, characterized in that: The UWB signal detector may be arranged inside or outside the vehicle body.

9. The vehicle monitoring system according to claim 1, characterized in that: The system controller generates the control signal based on at least two sets of monitoring data generated successively.

10. A vehicle, characterized in that: The vehicle comprises a vehicle body and a vehicle monitoring system as claimed in any one of claims 1 to 8 arranged on the vehicle body.

Images