In-vehicle occupant monitoring device

Abstract

The utility model discloses a motor vehicle cabin inside living body monitoring device, include: flexible sensor array of flexible adhesion in the cabin wall surface of motor vehicle's cabin easily be touched by living things, for responding monitoring instruction and in real time monitoring and feedback monitoring electric signal when being triggered, control module is linked with the car machine system of motor vehicle and flexible sensor array, for sending monitoring instruction when motor vehicle is off and locks the car, and obtains the real feature of monitoring with the monitoring electric signal of flexible sensor array feedback using the living thing identification algorithm model of prestorage analysis and identification, compares the real feature with the living body biological characteristic of prearranging to judge whether the cabin exists living things, if judging exists living things, then sends early warning signal, and early warning module is linked with control module, for responding early warning signal and giving an alarm. This embodiment can effectively improve the detection accuracy of cabin inside living body.

Description

Technical Field

[0001] This utility model relates to the field of in-vehicle live body detection technology, and in particular to a live body monitoring device in the cabin of a motor vehicle. Background Technology

[0002] Motor vehicles are usually equipped with in-cabin liveness detection devices to monitor whether children or pets are left in the vehicle, in order to prevent accidents such as suffocation or heatstroke of children or pets in the confined cabin.

[0003] Existing in-vehicle liveness detection devices typically rely on cabin monitoring equipment such as cameras, ultrasonic radar, or millimeter-wave radar installed inside the vehicle cabin; or they use rigid sensors installed inside the cabin to achieve liveness detection. However, the above-mentioned cabin monitoring equipment has problems such as privacy leaks and detection blind spots, while traditional rigid sensors are difficult to conform to the complex curved surfaces inside the vehicle cabin and are not sensitive to slight pressure changes, resulting in insufficient accuracy in liveness detection. Utility Model Content

[0004] The technical problem to be solved by this utility model embodiment is to provide a live body monitoring device in the cabin of a motor vehicle, which can effectively improve the accuracy of live body monitoring in the cabin.

[0005] To solve the above-mentioned technical problems, the present invention provides the following technical solution: a liveness monitoring device for a motor vehicle cabin, comprising: A flexible sensor array is flexibly attached to the surface of the cabin wall of a motor vehicle that is easily touched by living things. It is used to perform real-time monitoring in response to monitoring commands and to feed back monitoring electrical signals when triggered. The control module, connected to the vehicle's infotainment system and the flexible sensor array, issues the monitoring command when the vehicle is turned off and locked. It then uses a pre-stored liveness detection algorithm model to analyze and identify the monitoring electrical signals fed back by the flexible sensor array to obtain the detected physical characteristics. These physical characteristics are compared with preset liveness biological characteristics to determine whether a living being exists in the cabin. If a living being is detected, a warning signal is issued. The early warning module, connected to the control module, is used to issue an alarm in response to the early warning signal.

[0006] Furthermore, the device also includes a signal processing module that is respectively connected to the flexible sensor array and the control module, the signal processing module comprising: A signal amplifier, connected to the flexible sensor array, is used to amplify the monitoring electrical signals transmitted from the flexible sensor array; and A signal filter, connected to both the signal amplifier and the control module, is used to filter the amplified monitoring electrical signal and output the filtered signal to the control module.

[0007] Furthermore, the device also includes a carbon dioxide sensor located in the cabin and connected to the control module. The physical characteristics include at least the actual breathing rate. The control module also receives the actual carbon dioxide concentration in the cabin monitored and output by the carbon dioxide sensor, first determines whether the actual breathing rate exceeds a preset frequency threshold, and if so, further determines whether the actual carbon dioxide concentration exceeds a first preset concentration threshold, and issues the warning signal when the actual carbon dioxide concentration exceeds the first preset concentration threshold.

[0008] Furthermore, the device also includes a temperature sensor located inside the cabin and connected to the control module. The control module is also externally connected to the vehicle's air conditioning system and / or window controller. The control module is also used to receive the actual temperature inside the cabin monitored and output by the temperature sensor, and after issuing the warning signal, analyze the dynamic changes of the actual carbon dioxide concentration and the actual temperature in real time. When the actual carbon dioxide concentration exceeds a second preset concentration threshold and / or the actual temperature exceeds a preset temperature threshold, the control module controls the air conditioning system to start and / or controls the window glass to move a predetermined distance to form a ventilation channel connecting the inside and outside of the cabin.

[0009] Furthermore, the control module is also connected to the vehicle's T... The BOX communication module is connected to the T when issuing a warning signal. The BOX communication module synchronously sends alert messages to pre-designated remote user terminals.

[0010] Furthermore, the device also includes: A CAN transceiver, connected to the control module and externally connected to the vehicle's body gateway, is used to enable communication between the control module and various functional modules of the vehicle via the body gateway.

[0011] Furthermore, the device also includes: The power management module is connected to the flexible sensor array, the control module, the early warning module, and the CAN transceiver, and is externally connected to the vehicle's power supply battery. It is used to convert the power supply voltage output by the power supply battery into a predetermined voltage to power the flexible sensor array, the control module, the early warning module, and the CAN transceiver.

[0012] Furthermore, the device also includes: The connector module is connected to the power management module and the CAN transceiver respectively, and is used to connect the vehicle gateway and the power supply battery.

[0013] Furthermore, the flexible sensor array is attached to the seat surface, the vehicle floor, and / or the inner wall of the vehicle compartment within the cabin.

[0014] Furthermore, the warning module is a sound alarm and / or a light alarm.

[0015] After adopting the above technical solution, the present invention has at least the following beneficial effects: When the motor vehicle is turned off and locked, the control module immediately issues a monitoring command to control the flexible sensor array to start working. Since the flexible sensor array can be flexibly attached to the surface of the cabin wall of the motor vehicle that is easily touched by living things, the detection accuracy of the slight movement of living things is very high. Furthermore, the control module uses a pre-stored living thing recognition algorithm model to analyze and identify the monitoring electrical signal to obtain the physical characteristics. Then, by comparing the physical characteristics with the preset living biological characteristics, it can quickly determine whether there are living things in the cabin. When it is determined that there are living things, an early warning signal is issued to control the early warning module to alarm, thereby realizing the effective monitoring of living things in the cabin. Attached Figure Description

[0016] Figure 1 This is a circuit block diagram of an optional embodiment of the in-vehicle liveness monitoring device of this utility model.

[0017] Figure 2 This is a circuit diagram of another optional embodiment of the in-vehicle liveness monitoring device of this utility model. Detailed Implementation

[0018] The present application will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be understood that the following illustrative embodiments and descriptions are only used to explain the present utility model and are not intended to limit the present utility model. Moreover, the embodiments and features in the embodiments of the present application can be combined with each other unless otherwise specified.

[0019] like Figure 1 As shown, an optional embodiment of this utility model provides a liveness detection device 1 for a motor vehicle cabin, comprising: A flexible sensor array 10 is flexibly attached to the surface of the cabin wall of a motor vehicle that is easily touched by living things. It is used to perform real-time monitoring in response to monitoring commands and to feed back monitoring electrical signals when triggered. Control module 12, connected to the vehicle's infotainment system 2 and the flexible sensor array 10, issues the monitoring command when the vehicle is turned off and locked. It uses a pre-stored liveness detection algorithm model to analyze and identify the monitoring electrical signals fed back by the flexible sensor array 10 to obtain the detected physical characteristics. It compares these physical characteristics with preset liveness biological characteristics to determine whether a living being exists in the cabin. If a living being is detected, a warning signal is issued. The early warning module 14 is connected to the control module 12 and is used to issue an alarm in response to the early warning signal.

[0020] In this embodiment of the invention, after the vehicle is turned off and locked, the control module 12 immediately issues a monitoring command to control the flexible sensor array 10 to start working. Since the flexible sensor array 10 can be flexibly attached to the surface of the cabin wall of the vehicle that is easily touched by living things, the detection accuracy of the slight movement of living things is very high. Furthermore, the control module 12 uses a pre-stored living thing recognition algorithm model to analyze and identify the monitoring electrical signal to obtain the physical characteristics. Then, by comparing the physical characteristics with the preset living biological characteristics, it can quickly determine whether there are living things in the cabin. When it is determined that there are living things, an early warning signal is issued to control the early warning module 14 to alarm, thereby realizing the effective monitoring of living things in the cabin.

[0021] In specific implementation, each flexible sensor constituting the flexible sensor array 10 can be a piezoresistive, capacitive, or piezoelectric sensor.

[0022] In one optional embodiment of this utility model, such as Figure 2 As shown, the device further includes a signal processing module 16 connected to the flexible sensor array 10 and the control module 12 respectively. The signal processing module 16 includes: Signal amplifier 161, connected to the flexible sensor array 10, is used to amplify the monitoring electrical signal transmitted from the flexible sensor array 10; and The signal filter 163 is connected to the signal amplifier and the control module 12 respectively, and is used to filter the amplified monitoring electrical signal and output the filtered signal to the control module 12.

[0023] In this embodiment, a signal processing module 16 is also provided, and the corresponding signal amplifier 161 and signal filter 163 amplify and filter the signal respectively. The processed monitoring signal can more accurately reflect the presence status of living things inside the vehicle.

[0024] In one optional embodiment of this utility model, such as Figure 2As shown, the device also includes a carbon dioxide sensor 3 located inside the cabin and connected to the control module 12. The physical characteristic includes at least the actual breathing frequency. The control module 12 also receives the actual carbon dioxide concentration in the cabin monitored and output by the carbon dioxide sensor, first determines whether the actual breathing frequency exceeds a preset frequency threshold (e.g., 0.5Hz), and if so, further determines whether the actual carbon dioxide concentration exceeds a first preset concentration threshold, and issues the warning signal when the actual carbon dioxide concentration exceeds the first preset concentration threshold. In this embodiment, when it is determined that the breathing frequency of an object exceeds the preset frequency threshold, the device further determines whether the carbon dioxide concentration in the cabin exceeds the first preset concentration threshold, thereby avoiding misjudgment and improving the accuracy of judgment.

[0025] In specific implementation, the carbon dioxide sensor 3 can be an existing component on the vehicle, or it can be added later if the original vehicle does not have it installed. The physical characteristics can also include heart rate and the regularity of activity. Since biological activity is not a perfect mechanical clock, there are slight variations in the interval between heartbeats, slight fluctuations in respiratory depth and frequency, and randomness in muscle activity. This results in the monitoring electrical signal having slight irregular fluctuations superimposed on the macroscopic cycle. The signal generated by a static object is usually a DC component that is close to a straight line or changes extremely slowly (due to ambient temperature drift), with almost no AC component. Therefore, by judging whether the monitoring electrical signal has a regularity, it can be determined whether the object is a living organism.

[0026] In practical implementation, it is understood that the liveness detection algorithm model is an existing algorithm model, which is currently used in fields such as smart homes and medical monitoring. Many related algorithms can be selected, such as those based on electrocardiogram (ECG) signals, classifiers based on SVM, decision trees, and KNN, and algorithms based on dynamic time warping (DTW). Of course, the control module 12, in conjunction with monitoring of carbon dioxide concentration and temperature within the cabin, can also employ the algorithm model described above. Therefore, the control module 12 of this embodiment can entirely utilize a data processing chip pre-installed with the aforementioned algorithm model.

[0027] In one optional embodiment of this utility model, such as Figure 2As shown, the device also includes a temperature sensor 4 located inside the cabin and connected to the control module 12. The control module 12 is also connected to the vehicle's air conditioning system 5 and / or window controller 6. The control module 12 is also used to receive the actual temperature inside the cabin monitored and output by the temperature sensor 4, and after issuing the warning signal, analyze the dynamic changes in the actual carbon dioxide concentration and the actual temperature in real time. When the actual carbon dioxide concentration exceeds a second preset concentration threshold and / or the actual temperature exceeds a preset temperature threshold, the control module 12 controls the air conditioning system to start and / or controls the window glass to move a predetermined distance to form a ventilation channel connecting the inside and outside of the cabin. In this embodiment, when it is determined that the carbon dioxide concentration or temperature inside the cabin is too high, the control module 12 can control the vehicle to turn on the air conditioning system 5 to actively circulate and cool the air, or control the window to move down a predetermined safe distance, thereby forming a ventilation channel to ensure the safety of living beings inside the cabin. In specific implementation, the temperature sensor 4 can be an existing component of the vehicle, or if it is not installed on the original vehicle, it can be added later.

[0028] In one optional embodiment of this utility model, such as Figure 2 As shown, the control module 12 is also connected to the T-shaped motor vehicle. The BOX communication module 7 is connected to the T when issuing a warning signal. The BOX communication module 7 synchronously sends warning information to the pre-designated remote user terminal 70. In this embodiment, when the control module 12 determines that a living person exists in the cockpit, it also sends a warning message via T. The BOX communication module 7 sends warning messages to a pre-designated remote user terminal 70 to remotely remind the user and improve safety. In specific implementations, the remote user terminal 70 can be a pre-bound personal device such as a driver's mobile phone or personal computer.

[0029] In one optional embodiment of this utility model, such as Figure 2 As shown, the device further includes: The CAN transceiver 17 is connected to the control module 12 and externally connected to the vehicle's body gateway 8, and is used to realize communication between the control module 12 and the various existing functional modules of the vehicle via the body gateway 8.

[0030] In this embodiment, a CAN transceiver 17 is also provided. The control module 12 can communicate with the vehicle gateway 8 through the CAN transceiver 17, thereby realizing indirect communication between the control module 12 and various functional modules of the vehicle and simplifying circuit connections. Figure 1 As shown, it can be understood that the functional modules may include the aforementioned air conditioning system 5, window controller 6, and T BOX communication module 7, etc.; Of course, when the carbon dioxide sensor 3 and the temperature sensor 4 are originally installed on the vehicle, the CAN transceiver 17 can also communicate with the carbon dioxide sensor 3 and the temperature sensor 4 through the vehicle gateway 8.

[0031] In one optional embodiment of this utility model, such as Figure 2 As shown, the device further includes: The power management module 18 is connected to the flexible sensor array 10, the control module 12, the early warning module 14 and the CAN transceiver 17 respectively, and is externally connected to the vehicle's power supply battery 9. It is used to convert the power supply voltage output by the power supply battery 9 into a predetermined voltage to power the flexible sensor array 10, the control module 12, the early warning module 14 and the CAN transceiver 17.

[0032] In this embodiment, since the operating voltages of the flexible sensor array 10, the control module 12, the early warning module 14, and the CAN transceiver 17 may differ (e.g., 5V or 3.3V), a power management module 18 is also configured to convert the supply voltage to a predetermined voltage before supplying power to the corresponding devices, ensuring the normal and stable operation of each device. In specific implementations, considering the actual situation of the vehicle, the power supply battery 9 can be the vehicle's main power supply battery or a backup power supply battery. Furthermore, the power management module 18 can be connected to both the vehicle's main power supply battery and the backup power supply battery simultaneously, thereby achieving redundant power supply and ensuring the stable, reliable, and long-lasting operation of the monitoring device.

[0033] Specifically, such as Figure 2 As shown, the signal processing module 16, control module 12 and early warning module 14 can be integrated into a data processing chip circuit B, which consists of a data processing chip (e.g., a single-chip microcomputer S32k312) and its peripheral circuits.

[0034] In one optional embodiment of this utility model, such as Figure 2 As shown, the device further includes: Connector module 19 is connected to the power management module 18 and the CAN transceiver 17 respectively and is used to connect the vehicle gateway 8 and the power supply battery 9 externally.

[0035] In this embodiment, a connector module 19 is also provided. The connector module 19 can be equipped with a power connector and a network connector to connect to the power supply battery 9 and the vehicle body gateway 8 respectively, thereby facilitating the connection between the device and the corresponding circuit of the motor vehicle.

[0036] In one optional embodiment of this invention, the flexible sensor array 10 is attached to the seat surface, vehicle floor, and / or interior wall of the cabin. In this embodiment, the seat surface (e.g., each seat surface in the rear seats), vehicle floor, and / or interior wall of the cabin are surfaces that children and pets can easily access. Placing the flexible sensor array 10 at these locations avoids missed detections.

[0037] In an optional embodiment of this utility model, the warning module 14 is a sound alarm and / or a light alarm. In this embodiment, the warning module 14 can use sound and / or light alarms to effectively alert people outside the vehicle that a living person has been left behind in the cabin. In specific implementations, the sound alarm and / or light alarm can also be existing alarms on the vehicle, such as vehicle horns, music systems, or vehicle warning lights.

[0038] The embodiments of the present invention have been described above with reference to the accompanying drawings. However, the present invention is not limited to the specific embodiments described above. The specific embodiments described above are merely illustrative and not restrictive. Those skilled in the art can make many other forms under the guidance of the present invention without departing from the spirit and scope of the claims. All of these forms are within the scope of protection of the present invention.

Claims

1. A liveness detection device for a motor vehicle cabin, characterized in that, The device includes: A flexible sensor array is flexibly attached to the surface of the cabin wall of a motor vehicle that is easily touched by living things. It is used to perform real-time monitoring in response to monitoring commands and to feed back monitoring electrical signals when triggered. The control module, connected to the vehicle's infotainment system and the flexible sensor array, issues the monitoring command when the vehicle is turned off and locked. It then uses a pre-stored liveness detection algorithm model to analyze and identify the monitoring electrical signals fed back by the flexible sensor array to obtain the detected physical characteristics. These physical characteristics are compared with preset liveness biological characteristics to determine whether a living being exists in the cabin. If a living being is detected, a warning signal is issued. The early warning module, connected to the control module, is used to issue an alarm in response to the early warning signal.

2. The in-vehicle liveness monitoring device as described in claim 1, characterized in that, The device further includes a signal processing module that is connected to the flexible sensor array and the control module respectively, and the signal processing module includes: A signal amplifier, connected to the flexible sensor array, is used to amplify the monitoring electrical signals transmitted from the flexible sensor array; and A signal filter, connected to both the signal amplifier and the control module, is used to filter the amplified monitoring electrical signal and output the filtered signal to the control module.

3. The in-vehicle liveness monitoring device as described in claim 1, characterized in that, The device also includes a carbon dioxide sensor located in the cabin and connected to the control module. The physical characteristics include at least the actual breathing rate. The control module also receives the actual carbon dioxide concentration in the cabin monitored and output by the carbon dioxide sensor, first determines whether the actual breathing rate exceeds a preset frequency threshold, and if so, further determines whether the actual carbon dioxide concentration exceeds a first preset concentration threshold, and issues the warning signal when the actual carbon dioxide concentration exceeds the first preset concentration threshold.

4. The in-vehicle liveness monitoring device as described in claim 3, characterized in that, The device also includes a temperature sensor located in the cabin and connected to the control module. The control module is also externally connected to the vehicle's air conditioning system and / or window controller. The control module is also used to receive the actual temperature inside the cabin monitored and output by the temperature sensor, and after issuing the warning signal, analyze the dynamic changes of the actual carbon dioxide concentration and the actual temperature in real time. When the actual carbon dioxide concentration exceeds a second preset concentration threshold and / or the actual temperature exceeds a preset temperature threshold, the control module controls the air conditioning system to start and / or controls the window glass to move a predetermined distance to form a ventilation channel connecting the inside and outside of the cabin.

5. The in-vehicle liveness monitoring device as described in claim 1, characterized in that, The control module is also connected to the vehicle's T The BOX communication module is connected to the T when issuing a warning signal. The BOX communication module synchronously sends alert messages to pre-designated remote user terminals.

6. The in-vehicle liveness monitoring device as described in claim 4 or 5, characterized in that, The device further includes: A CAN transceiver, connected to the control module and externally connected to the vehicle's body gateway, is used to enable communication between the control module and various functional modules of the vehicle via the body gateway.

7. The in-vehicle liveness monitoring device as described in claim 6, characterized in that, The device further includes: The power management module is connected to the flexible sensor array, the control module, the early warning module, and the CAN transceiver, and is externally connected to the vehicle's power supply battery. It is used to convert the power supply voltage output by the power supply battery into a predetermined voltage to power the flexible sensor array, the control module, the early warning module, and the CAN transceiver.

8. The in-vehicle liveness monitoring device as described in claim 7, characterized in that, The device further includes: The connector module is connected to the power management module and the CAN transceiver respectively, and is used to connect the vehicle gateway and the power supply battery.

9. The in-vehicle liveness monitoring device as described in claim 1, characterized in that, The flexible sensor array is attached to the seat surface, the vehicle floor, and / or the inner wall of the vehicle compartment within the cabin.

10. The in-vehicle liveness monitoring device as described in claim 1, characterized in that, The early warning module is a sound alarm and / or a light alarm.

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