Vehicle child passenger safety protection system and method

Abstract

The invention relates to the technical field of vehicle safety systems, in particular to a vehicle child passenger safety protection system and method, and the system comprises a passenger monitoring module, a safety seat state detection module, a safety seat safety belt detection module, a vehicle body controller and a cabin controller; the passenger monitoring module collects in-vehicle vital sign data and in-vehicle image data, the safety seat state detection module detects the installation state of a safety seat, and the safety seat safety belt detection module detects the safety belt wearing state of the safety seat; the vehicle body controller obtains vehicle running state data and judges whether a safety seat is fixed or not; and the cabin controller identifies whether a child of 0-4 years old exists in the safety seat or not, judges whether the child is effectively restrained by the safety belt or not, and triggers a preset alarm instruction in a grading manner when conditions are met. The system can accurately monitor the installation state of the safety seat, the existence of the child and the wearing state of the safety belt and give an alarm in time, and the riding safety of the child is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of vehicle safety system, in particular to a vehicle child occupant safety protection system and method. BACKGROUND

[0002] As an important device for protecting infant and young children from harm during vehicle travel, the correct installation and use of child safety seat is of great significance to the safety of children's lives. In the prior art, vehicle safety monitoring systems mainly focus on driver state monitoring and vehicle driving parameter monitoring, and lack effective monitoring mechanisms for the use state of child safety seats in the vehicle. Although some child safety seats are equipped with basic installation indication functions, these functions are relatively simple and cannot form an effective linkage with the vehicle safety monitoring system, making it difficult to achieve comprehensive real-time monitoring of the child's riding state. Moreover, the environment in the vehicle is complex and variable, and other factors such as passenger activities and object placement interfere with the judgment of whether the child is using the safety seat correctly. At present, the installation and use state of the child safety seat is mainly confirmed by manual inspection, but the manual inspection method is highly subjective and prone to misjudgment and missed detection, which cannot ensure the accuracy and reliability of the detection of the installation and use state of the child safety seat. SUMMARY

[0003] Therefore, the purpose of the present application is to provide a vehicle child occupant safety protection system and method to solve at least one of the above technical problems.

[0004] In a first aspect, the present application provides a vehicle child occupant safety protection system, comprising an occupant monitoring module, a safety seat state detection module, a safety seat safety belt detection module, a vehicle body controller, and a cabin controller; the occupant monitoring module is used to collect in-vehicle vital sign data and in-vehicle image data and output them to the cabin controller; the safety seat state detection module is used to detect the installation state of the safety seat and output an installation state signal to the vehicle body controller; the safety seat safety belt detection module is used to detect the safety belt wearing state of the safety seat and output a wearing state signal to the cabin controller; the vehicle body controller is configured to: obtain vehicle operating state data; determine whether the safety seat is fixed based on the installation state signal and a preset installation state judgment threshold; and send the vehicle operating state data and the determination result of whether the safety seat is fixed to the cabin controller; the cabin controller is configured to: identify whether there is a child aged 0-4 years old in the safety seat based on the in-vehicle vital sign data and the in-vehicle image data, and determine whether the child is effectively restrained by the safety belt in combination with the wearing state signal and a preset wearing state judgment threshold; and when it is identified that there is a child aged 0-4 years old in the safety seat and the safety seat is not fixed or the child is not effectively restrained by the safety belt, trigger a preset warning instruction in combination with the vehicle operating state data.

[0005] In combination with the first aspect, in some optional embodiments, the occupant monitoring module comprises a millimeter wave radar and a visual sensor, the millimeter wave radar is configured to collect in-vehicle vital sign data and output to the cockpit controller, and the visual sensor is configured to collect in-vehicle image data and output to the cockpit controller.

[0006] In combination with the first aspect, in some optional embodiments, the safety seat state detection module comprises a pressure sensor, the pressure sensor is installed at a safety seat interface of the vehicle, the pressure sensor is configured to detect a connection pressure of the safety seat and the safety seat interface, and output a pressure detection signal to the vehicle body controller; the installation state signal comprises the pressure detection signal.

[0007] In combination with the first aspect, in some optional embodiments, the safety seat state detection module further comprises a Hall sensor, the Hall sensor is installed at the safety seat interface, the Hall sensor is configured to detect a locking state of the safety seat and the safety seat interface, and output a locking state signal to the vehicle body controller; the installation state signal further comprises the locking state signal.

[0008] In combination with the first aspect, in some optional embodiments, the safety seat belt detection module comprises a conductive fabric sensor, the conductive fabric sensor is installed at a seat belt buckle of the safety seat, the conductive fabric sensor is configured to detect a resistance change caused by closing of the seat belt buckle or stretching of the seat belt, and output a resistance detection signal to the cockpit controller; the wearing state signal comprises the resistance detection signal.

[0009] In combination with the first aspect, in some optional embodiments, the preset warning instruction triggered in stages comprises: when the vehicle is in a powered-off and unstarted state, and it is identified that there is a child aged 0-4 years old in the safety seat and the safety seat is not fixed, a pop-up window on the instrument panel is triggered to remind; when the vehicle has started and the driving speed is less than or equal to a preset speed, and it is identified that there is a child aged 0-4 years old in the safety seat and the safety seat is not fixed or the child is not effectively restrained by the seat belt, a warning icon on the instrument panel is triggered to flash and a prompt sound is triggered to be emitted by the vehicle audio; when the vehicle has started and it is identified that there is a child aged 0-4 years old in the safety seat, and any one of the following conditions is met, a vehicle speed limiting request is sent to the vehicle body controller: the vehicle driving distance is greater than or equal to a preset distance; the duration of the state that the safety seat is not fixed or the child is not effectively restrained by the seat belt is greater than or equal to a preset time.

[0010] In combination with the first aspect, in some optional embodiments, the preset warning instruction triggered in stages further comprises: when the vehicle has started and the driving speed is greater than the preset speed, and it is identified that there is a child aged 0-4 years old in the safety seat and the safety seat is not fixed or the child is not effectively restrained by the seat belt, the warning icon on the instrument panel is triggered to flash and the prompt sound is triggered to be emitted by the vehicle audio at an accelerated frequency.

[0011] In combination with the first aspect, in some optional embodiments, the cabin controller is further configured to: start timing when the safety seat is not fixed or the child is not effectively restrained by the safety belt, stop timing and clear when it is detected that the safety seat is fixed and the child is effectively restrained by the safety belt, so as to obtain the duration of the state that the safety seat is not fixed or the child is not effectively restrained by the safety belt, for the judgment of triggering the preset warning instruction in stages.

[0012] In combination with the first aspect, in some optional embodiments, a data storage module is further included, and the cabin controller is further configured to: store the triggering time and triggering type of the warning instruction, the vehicle running state data, and the data collected by the occupant monitoring module in the data storage module in association, to form a historical safety record.

[0013] In the second aspect, the application provides a vehicle child occupant safety protection method, which is implemented by the vehicle child occupant safety protection system in any one of the embodiments of the first aspect. The method comprises: collecting in-vehicle vital sign data, in-vehicle image data, a safety seat installation state signal, a safety seat belt wearing state signal, and vehicle running state data; identifying whether a 0-4-year-old child exists in the safety seat based on the in-vehicle vital sign data and the in-vehicle image data, judging whether the safety seat is fixed based on the installation state signal, and judging whether the child is effectively restrained by the safety belt based on the in-vehicle vital sign data, the in-vehicle image data, and the wearing state signal; and when it is identified that a 0-4-year-old child exists in the safety seat and the safety seat is not fixed or the child is not effectively restrained by the safety belt, triggering the preset warning instruction in stages in combination with the vehicle running state data.

[0014] Based on the above technical solutions, the vehicle child occupant safety protection system and method provided by the application utilize the data collected by the occupant monitoring, safety seat state detection, and safety seat belt detection modules, and the linkage of the vehicle body controller and the cabin controller, to realize the automatic monitoring of the safety seat installation state, the existence of a child, and the safety belt wearing state, effectively eliminating the subjective misjudgment and missed detection risk of manual inspection, and ensuring that abnormal conditions can be stably identified even in a complex in-vehicle environment. At the same time, the objective analysis based on the preset judgment threshold and the dynamic triggering of the warning instruction in combination with the vehicle running state data not only can timely remind the driver to correct problems such as the safety seat not being fixed or the child not being effectively restrained, but also avoids the defect that the monitoring function is isolated and cannot be linked in the prior art, thereby greatly reducing the risk of child riding accidents and providing comprehensive safety protection for 0-4-year-old infants. In summary, the vehicle child occupant safety protection system and method optimize the intelligent level of the vehicle safety system and improve the protection efficiency and response speed. BRIEF DESCRIPTION OF DRAWINGS

[0015] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following will briefly introduce the drawings needed to be used in the embodiments. It should be understood that the following drawings only show some of the embodiments of the present application, and therefore should not be considered as limiting the scope. For those skilled in the art, other related drawings can also be obtained without creative labor.

[0016] Figure 1 A structural block diagram of a vehicle child occupant safety protection system provided by the embodiments of the present application.

[0017] Figure 2 A vehicle child occupant safety protection method provided by the embodiments of the present application.

[0018] Reference signs: 100, vehicle child occupant safety protection system; 10, occupant monitoring module; 11, millimeter wave radar; 12, visual sensor; 20, safety seat state detection module; 21, pressure sensor; 22, Hall sensor; 30, safety seat safety belt detection module; 31, conductive fabric sensor; 40, vehicle body controller; 50, cabin controller. DETAILED DESCRIPTION

[0019] The specific embodiments of the present application will be described in detail below with reference to the accompanying drawings. Obviously, the described embodiments are only some of the embodiments of the present application, not all the embodiments. Based on the description of the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of the present application.

[0020] In the description of the present application, unless otherwise explicitly specified and limited, the terms "connection", "setting", "installation" and the like should be understood broadly, for example, "connection" can be fixed connection, can also be detachable connection, or integral connection; can be mechanical connection, can also be electrical connection; can be direct connection, can also be indirect connection through intermediate medium; can be internal communication of two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0021] The orientation or positional relationship indicated by the terms "upper", "lower", "left", "right", "front", "back", "center", "top", "bottom", "inner", "outer", "vertical", "horizontal", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like is based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship commonly used when the product of the application is used, and is only for the convenience of description and simplification of description, and therefore cannot be understood as indicating or implying that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0022] The terms "first", "second", "third", etc. are merely intended to distinguish similar elements, and do not indicate or imply relative importance or specific order, unless otherwise explicitly specified and limited.

[0023] The terms "comprise", "contain", "have" or any other variant thereof are intended to cover non-exclusive inclusion, so that the process, method, article or device including a series of elements not only includes those elements, but also includes other elements not explicitly listed, or further includes elements inherent to such process, method, article or device. Without more limitations, the element defined by the statement "comprising a" does not exclude the presence of other identical elements in the process, method, article or device comprising the element.

[0024] The term "a plurality of" means more than two (including two).

[0025] The term "and / or" is a description of the association relationship of the associated objects, which means that there can be three relationships, for example, A and / or B, which can represent the three cases of A alone, A and B together, and B alone.

[0026] The terms "one embodiment", "as an example", "in an embodiment" and the like describe that the specific features, structures, materials or characteristics described in connection with the embodiment or example can be included in at least one embodiment or example of the present application. The illustrative representation of such terms does not necessarily refer to the same embodiment, nor is it independent or alternative to other embodiments. In the case of no conflict, the embodiments in the present application and the features in the embodiments can be combined in a suitable manner.

[0027] Figure 1 A structural block diagram of a vehicle child occupant safety protection system provided by an embodiment of the present application is shown in FIG. 1, which shows that the present application provides a vehicle child occupant safety protection system, which comprises an occupant monitoring module, a safety seat state detection module, a safety seat safety belt detection module, a vehicle body controller and a cabin controller. The following will make specific description of each part. Figure 1

[0028] The occupant monitoring module is used to collect in-vehicle vital sign data and in-vehicle image data, and output to the cabin controller.

[0029] ​As an example, the occupant monitoring module includes a millimeter wave radar and a visual sensor. The millimeter wave radar is configured to collect in-vehicle vital sign data and output the in-vehicle vital sign data to the cabin controller, and the visual sensor is configured to collect in-vehicle image data and output the in-vehicle image data to the cabin controller. The millimeter wave radar can be installed on a roof of the vehicle or a back seat backrest, and the visual sensor can be installed on the roof of the vehicle and face a safety seat area.

[0030] The millimeter wave radar detects micro-motion characteristics and body contours of an in-vehicle target, and the purpose is to capture spatial coordinates of a child, and then the cabin controller determines whether the coordinates are within a preset physical boundary range of the safety seat. The visual sensor captures images of the safety seat area in real time, captures occupant characteristics and postures, and then the cabin controller analyzes whether the child's body is contained in the concave bearing structure of the safety seat by using image recognition technology. In this way, it can be determined whether a child aged 0-4 is present in the safety seat, while excluding adult, teenager and pet interference factors. It should be noted that the cabin controller is preconfigured with a multi-modal fusion perception algorithm and a biometric classifier, and the multi-modal fusion perception algorithm and the biometric classifier belong to the prior art, which will not be described here.

[0031] The safety seat state detection module is configured to detect an installation state of the safety seat and output an installation state signal to the body controller.

[0032] As an example, the safety seat state detection module includes a pressure sensor. The pressure sensor is installed at a safety seat interface of the vehicle, and the pressure sensor is configured to detect a connection pressure of the safety seat and the safety seat interface and output a pressure detection signal to the body controller. The installation state signal includes the pressure detection signal. The pressure sensor detects the connection pressure of the safety seat and the safety seat interface, and then the body controller compares the detected connection pressure with a preset installation state judgment threshold to determine whether the safety seat is preliminarily fixed. Specifically, when the connection pressure is greater than or equal to the installation state judgment threshold (e.g., 5kgf), it indicates that the safety seat is preliminarily fixed, and when the connection pressure is less than the installation state judgment threshold (e.g., 5kgf), it indicates that the safety seat is not preliminarily fixed.

[0033] Further, the safety seat state detection module further comprises a Hall sensor. The Hall sensor is installed at the safety seat interface, and the Hall sensor is configured to detect the locking state of the safety seat and the safety seat interface and output a locking state signal to the vehicle body controller; the installation state signal further comprises the locking state signal. Specifically, a magnetic member is arranged on a locking mechanism of the safety seat connected with the safety seat interface, the Hall sensor detects the magnetic field change of the magnetic member, and then the vehicle body controller determines whether the safety seat is locked according to the locking state signal output by the Hall sensor. Specifically, when the Hall sensor detects the magnetic field of the magnetic member, a low-level signal is output, indicating that the safety seat is locked; when the Hall sensor does not detect the magnetic field of the magnetic member, a high-level signal is output, indicating that the safety seat is not locked. Further, when the safety seat is preliminarily fixed and locked, it indicates that the safety seat is fixed; when the safety seat is not preliminarily fixed or not locked, it indicates that the safety seat is not fixed.

[0034] The safety seat safety belt detection module is configured to detect the safety belt wearing state of the safety seat and output a wearing state signal to the cabin controller.

[0035] As an example, the safety seat safety belt detection module comprises a conductive fabric sensor. The conductive fabric sensor is installed at the safety belt buckle of the safety seat, and the conductive fabric sensor is configured to detect the resistance change caused by the safety belt buckle closure or the safety belt stretching, and output a resistance detection signal to the cabin controller; the wearing state signal comprises the resistance detection signal. The conductive fabric sensor detects the resistance change caused by the safety belt buckle closure or the safety belt stretching, and then the cabin controller compares the detected resistance value with a preset wearing state judgment threshold to determine whether the safety belt is correctly worn. Specifically, when the resistance value is less than or equal to the wearing state judgment threshold (such as 100Ω), it indicates that the safety belt is correctly worn; when the resistance value is greater than the wearing state judgment threshold (such as 100Ω), it indicates that the safety belt is not worn or not correctly worn.

[0036] Further, the safety seat safety belt detection module further comprises a tension sensor. The tension sensor is installed inside the safety belt webbing, and is configured to detect the tension of the safety belt and output a tension detection signal to the cabin controller; the wearing state signal further comprises the tension detection signal. The tension sensor detects the tension of the safety belt webbing, and then the cabin controller compares the detected tension value with a preset tension threshold range to determine the tightness of the safety belt wearing. Specifically, when the tension value is within the tension threshold range (such as 20-80N), it indicates that the safety belt wearing is appropriate; when the tension value is less than the lower threshold, it indicates that the safety belt wearing is too loose; when the tension value is greater than the upper threshold, it indicates that the safety belt wearing is too tight.

[0037] The vehicle body controller is configured to: acquire vehicle running state data; judge whether the safety seat is fixed based on the installation state signal and a preset installation state judgment threshold; and send the vehicle running state data and the judgment result of whether the safety seat is fixed to the cabin controller. The vehicle running state data at least includes ignition switch state, engine state, driving speed and driving distance.

[0038] The cabin controller is configured to: identify whether a child of 0-4 years old exists in the safety seat based on the in-vehicle vital sign data and the in-vehicle image data, and judge whether the child is effectively restrained by the safety belt in combination with the wearing state signal and a preset wearing state judgment threshold; and when it is identified that the child of 0-4 years old exists in the safety seat, and the safety seat is not fixed or the child is not effectively restrained by the safety belt, trigger a preset warning instruction in combination with the vehicle running state data.

[0039] When the spatial coordinates of the child are within the preset physical boundary range of the safety seat, and the body of the child is contained in the concave bearing structure of the safety seat, and the safety belt is correctly worn, it indicates that the child is effectively restrained by the safety belt. When the spatial coordinates of the child are not within the preset physical boundary range of the safety seat, or the body of the child is not contained in the concave bearing structure of the safety seat, or the safety belt is not correctly worn, it indicates that the child is not effectively restrained by the safety belt.

[0040] In combination with the vehicle running state data, the preset warning instruction is triggered according to the following stages: Before the vehicle starts: when the vehicle is in a powered-off state and it is identified that the child of 0-4 years old exists in the safety seat and the safety seat is not fixed, a dashboard pop-up window is triggered to remind, for example, the dashboard pop-up window prompts the attention text “Please install and fix the child safety seat”. This is the initial warning.

[0041] When the vehicle has started and the driving speed is less than or equal to a preset speed (such as 20 km / h), and it is identified that the child of 0-4 years old exists in the safety seat and the safety seat is not fixed or the child is not effectively restrained by the safety belt, a dashboard flashing warning icon is triggered and a vehicle-mounted sound is triggered to emit a prompt sound. When the vehicle has started and the driving speed is greater than the preset speed (such as 20 km / h), and it is identified that the child of 0-4 years old exists in the safety seat and the safety seat is not fixed or the child is not effectively restrained by the safety belt, a dashboard flashing warning icon is triggered, and a vehicle-mounted sound is triggered to emit a prompt sound at an accelerated frequency, which is used to strengthen the warning effect. This is the upgraded warning.

[0042] Continuous violation: When the vehicle has started and the presence of a 0-4 year old child in the safety seat is identified, and any of the following conditions is met, send a vehicle speed limit request to the body controller: the vehicle has traveled a distance greater than or equal to a preset distance (e.g., 2 km); the duration of the state in which the safety seat is not fixed or the child is not effectively restrained by the safety belt is greater than or equal to a preset time (e.g., 3 minutes). This is an active intervention to reduce safety risks by sending a vehicle speed limit request to the body controller to limit driving speed.

[0043] Wherein, in order to obtain the duration of the state in which the safety seat is not fixed or the child is not effectively restrained by the safety belt, the cockpit controller is further configured to start timing when the safety seat is not fixed or the child is not effectively restrained by the safety belt, and stop timing and clear zero when the safety seat is fixed and the child is effectively restrained by the safety belt. After receiving the vehicle speed limit request, the body controller can control the engine output power or the brake system according to the preset speed limit strategy to limit the vehicle driving speed within a safe threshold range (e.g., 40 km / h) until the state in which the safety seat is fixed and the child is effectively restrained by the safety belt is confirmed.

[0044] In addition to the above parts, the vehicle child occupant safety protection system can further include a data storage module, and the cockpit controller is further configured to store the triggering time and type of the warning instruction, vehicle operating state data, and data collected by the occupant monitoring module in the data storage module to form a historical safety record. This can provide data support for subsequent safety analysis, accident tracing, and system optimization, and can also be used to generate a safety report for parents or guardians to view, improving children's awareness of safety when riding in a vehicle.

[0045] As shown in Figure 2 The embodiments of the present application also provide a vehicle child occupant safety protection method, which is implemented by the vehicle child occupant safety protection system described above. The method comprises: S101, collecting in-vehicle vital sign data, in-vehicle image data, safety seat installation state signals, safety seat belt wearing state signals, and vehicle operating state data; S102, based on the in-vehicle vital sign data and the in-vehicle image data, identifying whether a 0-4 year old child is present in the safety seat, based on the installation state signal, determining whether the safety seat is fixed, and based on the in-vehicle vital sign data, the in-vehicle image data, and the wearing state signal, determining whether the child is effectively restrained by the safety belt; S103, when a 0-4 year old child is identified in the safety seat, and the safety seat is not fixed or the child is not effectively restrained by the safety belt, triggering a preset warning instruction in combination with the vehicle operating state data.

[0046] In summary, the vehicle child occupant safety protection system and method provided by the embodiments of the present application collects data by using the occupant monitoring, safety seat state detection and safety seat safety belt detection modules, and realizes automatic monitoring of the safety seat installation state, child presence and safety belt wearing state in combination with the linkage of the vehicle body controller and the cabin controller, effectively eliminates the subjective misjudgment and missed detection risk of manual inspection, and ensures that abnormal conditions can also be stably identified under complex vehicle interior environments. At the same time, objective analysis is carried out based on a preset judgment threshold, and an alarm instruction is dynamically triggered in combination with vehicle running state data dynamic grading, which not only can timely remind the driver to correct problems such as the safety seat not being fixed or the child not being effectively restrained, but also avoids the defects of isolated monitoring function and inability to link in the prior art, thereby greatly reducing the risk of child riding accidents and providing comprehensive safety protection for 0-4 year old infants and young children. In summary, the vehicle child occupant safety protection system and method optimizes the intelligent level of the vehicle safety system and improves the protection efficiency and response speed.

[0047] The above merely illustrates the specific embodiments of the present application, but the protection scope of the present application is not limited thereto, and any person skilled in the art can easily think of various changes or replacements within the technical range disclosed by the present application, which should be covered within the protection scope of the present application.

Claims

1. A vehicle child occupant safety protection system, characterized by, The passenger monitoring module, the safety seat state detection module, the safety seat belt detection module, the vehicle body controller, and the cabin controller are included. The passenger monitoring module is configured to collect vehicle interior vital sign data and vehicle interior image data, and output the data to the cabin controller. The safety seat state detection module is configured to detect the installation state of the safety seat, and output an installation state signal to the vehicle body controller. The safety seat belt detection module is configured to detect the safety belt wearing state of the safety seat, and output a wearing state signal to the cabin controller. The vehicle body controller is configured to obtain vehicle operating state data. Based on the installation state signal and a preset installation state judgment threshold, it is determined whether the safety seat is fixed. The cabin controller is configured to identify whether a child aged 0-4 years old is present in the safety seat based on the vehicle interior vital sign data and the vehicle interior image data, and determine whether the child is effectively restrained by the safety belt in combination with the wearing state signal and a preset wearing state judgment threshold.

2. The vehicle child passenger safety system of claim 1, wherein, When a child aged 0-4 years old is identified to be present in the safety seat, and the safety seat is not fixed or the child is not effectively restrained by the safety belt, the vehicle operating state data is combined to trigger a preset warning instruction in stages.

3. The vehicle child passenger safety protection system of claim 1, wherein, The passenger monitoring module includes a millimeter wave radar and a visual sensor.

4. The vehicle child passenger safety protection system of claim 3, wherein, The safety seat state detection module includes a pressure sensor installed at a safety seat interface of the vehicle.

5. The vehicle child passenger safety protection system of claim 1, wherein, The safety seat state detection module also includes a Hall sensor installed at the safety seat interface.

6. The vehicle child passenger safety protection system of claim 1, wherein, The safety seat belt detection module includes a conductive fabric sensor installed at a safety belt buckle of the safety seat. The conductive fabric sensor detects resistance changes caused by the safety belt buckle closure or the safety belt stretching, and outputs a resistance detection signal to the cabin controller. The preset warning instruction triggered in stages includes: When the vehicle is in a powered-off and unstarted state, and a child aged 0-4 years old is identified to be present in the safety seat, and the safety seat is not fixed, a dashboard pop-up reminder is triggered. triggering a dashboard flashing warning icon and triggering a vehicle audio to emit a prompt sound when the vehicle has started and the driving speed is less than or equal to a preset speed, and it is identified that there is a child of 0-4 years old in the safety seat, and the safety seat is not fixed or the child is not effectively restrained by the safety belt; sending a vehicle speed limit request to the body controller when the vehicle has started and it is identified that there is a child of 0-4 years old in the safety seat, and any of the following conditions is met: the driving distance of the vehicle is greater than or equal to a preset distance; the duration of the state that the safety seat is not fixed or the child is not effectively restrained by the safety belt is greater than or equal to a preset time.

7. The vehicle child passenger safety protection system of claim 6, wherein, The hierarchical triggering of the preset warning instruction further comprises: triggering a dashboard flashing warning icon and triggering a vehicle audio to emit a prompt sound at an accelerated frequency when the vehicle has started and the driving speed is greater than a preset speed, and it is identified that there is a child of 0-4 years old in the safety seat, and the safety seat is not fixed or the child is not effectively restrained by the safety belt.

8. The vehicle child passenger safety protection system of claim 1, wherein, The cabin controller is further configured to start timing when the safety seat is not fixed or the child is not effectively restrained by the safety belt, and stop timing and clear zero when it is detected that the safety seat is fixed and the child is effectively restrained by the safety belt, to obtain the duration of the state that the safety seat is not fixed or the child is not effectively restrained by the safety belt, for the judgment of the hierarchical triggering of the preset warning instruction.

9. The vehicle child passenger safety protection system of claim 1, wherein, Further comprising a data storage module, the cabin controller is further configured to store the triggering time and triggering type of the warning instruction, the vehicle operating state data, and the data collected by the occupant monitoring module in the data storage module in association, to form a historical safety record.

10. A method of protecting a child occupant in a vehicle, characterized in that The method is implemented by the vehicle child occupant safety protection system according to any one of claims 1-9, and the method comprises: collecting in-vehicle vital sign data, in-vehicle image data, a safety seat installation state signal, a safety seat safety belt wearing state signal, and vehicle operating state data; identifying whether there is a child of 0-4 years old in the safety seat based on the in-vehicle vital sign data and the in-vehicle image data, judging whether the safety seat is fixed based on the installation state signal, and judging whether the child is effectively restrained by the safety belt based on the in-vehicle vital sign data, the in-vehicle image data, and the wearing state signal; when it is identified that there is a child of 0-4 years old in the safety seat, and the safety seat is not fixed or the child is not effectively restrained by the safety belt, triggering a preset warning instruction in a hierarchical manner in combination with the vehicle operating state data. triggering a dashboard flashing warning icon and triggering a vehicle audio to emit a prompt sound at an accelerated frequency when the vehicle has started and the driving speed is greater than a preset speed, and it is identified that there is a child of 0-4 years old in the safety seat, and the safety seat is not fixed or the child is not effectively restrained by the safety belt. The cabin controller is further configured to start timing when the safety seat is not fixed or the child is not effectively restrained by the safety belt, and stop timing and clear zero when it is detected that the safety seat is fixed and the child is effectively restrained by the safety belt, to obtain the duration of the state that the safety seat is not fixed or the child is not effectively restrained by the safety belt, for the judgment of the hierarchical triggering of the preset warning instruction. Further comprising a data storage module, the cabin controller is further configured to store the triggering time and triggering type of the warning instruction, the vehicle operating state data, and the data collected by the occupant monitoring module in the data storage module in association, to form a historical safety record. The method is implemented by the vehicle child occupant safety protection system according to any one of claims 1-9, and the method comprises: collecting in-vehicle vital sign data, in-vehicle image data, a safety seat installation state signal, a safety seat safety belt wearing state signal, and vehicle operating state data; identifying whether there is a child of 0-4 years old in the safety seat based on the in-vehicle vital sign data and the in-vehicle image data, judging whether the safety seat is fixed based on the installation state signal, and judging whether the child is effectively restrained by the safety belt based on the in-vehicle vital sign data, the in-vehicle image data, and the wearing state signal; when it is identified that there is a child of 0-4 years old in the safety seat, and the safety seat is not fixed or the child is not effectively restrained by the safety belt, triggering a preset warning instruction in a hierarchical manner in combination with the vehicle operating state data.

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