Child abandoned detection method, system, vehicle-mounted equipment, child seat and storage medium

Abstract

The embodiment of the present invention proposes a child abandonment detection method, system, vehicle-mounted equipment, child seat and storage medium, which belongs to the field of vehicle technology. The method includes: sending a wifi signal to the wifi module on the child seat to instruct the wifi module to return the channel status information of the wifi signal; obtaining the passenger status information of the child seat according to the channel status information sent by the wifi module; obtaining the detection value sent by the wifi module, and judging whether there is a child in the vehicle according to the detection value and the passenger status information; if there is a child, the vehicle-mounted equipment determines that a child has been abandoned when detecting that the vehicle is in a locked state or an ignition-off state, and controls the vehicle to initiate a child abandonment alarm. Whether a child has been abandoned in the vehicle can be detected without the aid of external detection equipment such as microwave radar and camera, and interference errors are reduced, thereby improving the accuracy and reliability of child abandonment detection and reducing detection costs.

Description

Technical Field

[0001] The present invention relates to the field of vehicle technology, and in particular to a child abandonment detection method, system, vehicle-mounted equipment, child seat and storage medium. Background Art

[0002] At present, in order to reduce the risk of children being left behind, direct sensing mode and indirect sensing mode are usually used for child abandonment detection and alarm. Among them, the direct sensing mode uses sensors such as microwave radars and cameras deployed in the car to detect the physiological characteristics (such as breathing, heartbeat) or behavioral activity characteristics of children to determine whether the child is in the car. The indirect sensing mode uses accessories outside the car to detect whether there are children in the car. However, both methods have the problem of not being able to take into account the reliability and cost of child abandonment detection. Summary of the invention

[0003] In view of this, an object of the present invention is to provide a child abandonment detection method, system, vehicle-mounted equipment, child seat and storage medium, which can reduce the detection cost while ensuring the reliability of child abandonment detection.

[0004] In order to achieve the above purpose, the technical solution adopted by the embodiment of the present invention is as follows:

[0005] In a first aspect, an embodiment of the present invention provides a method for detecting a child left behind, which is applied to an on-board device of a vehicle, wherein the on-board device is communicatively connected to a WiFi module on a child seat of the vehicle via WiFi, and the WiFi module is communicatively connected to a detection device on the child seat, and the method comprises:

[0006] Sending a wifi signal to the wifi module; wherein the wifi signal is used to instruct the wifi module to return channel status information of the wifi signal;

[0007] receiving the channel status information sent by the wifi module, and obtaining the passenger status information of the child seat according to the channel status information;

[0008] Obtaining the detection value sent by the wifi module, and judging whether there is a child in the vehicle according to the detection value and the passenger status information; wherein the detection value is the detection data of the current use of the child seat and / or the detection data of the non-child seat area by the detection device;

[0009] If yes, when it is detected that the vehicle is in a locked state or an engine-off state, it is determined that a child is left behind, and the vehicle is controlled to initiate a child-left-behind alarm.

[0010] Optionally, the step of obtaining the passenger status information of the child seat according to the channel status information includes:

[0011] The channel state information is processed using a pre-trained discriminant model to obtain the passenger state information of the child seat; wherein the passenger state information includes no passengers, stationary passengers and moving passengers; the discriminant model is obtained by training an initial classification model based on sample pairs of various riding scenarios of child seats in a vehicle, and each of the sample pairs includes the passenger state information and channel state information of the child seat.

[0012] Optionally, before the step of sending a WiFi signal to the WiFi module, the method further includes:

[0013] Obtain sample pairs of multiple seating scenarios of child seats in a vehicle;

[0014] All sample pairs are divided into a training set, a validation set and a test set, and an initial classification model is trained based on the training set, the validation set and the test set to obtain a discriminant model.

[0015] Optionally, when the detection value is a pressure value, the step of determining whether there is a child in the vehicle according to the detection value and the passenger status information includes:

[0016] Determine whether the detection value is within a preset child pressure range; wherein the child pressure range represents a floating relationship between a scene in which there is a child on the child seat and a pressure value of the detection device;

[0017] If so, it is determined that there is a child in the child seat, and when the passenger state information indicates that there is only a single passenger in motion, it is determined that there is a child in the vehicle.

[0018] Optionally, the step of determining whether there is a child in the vehicle according to the detection value and the passenger status information includes:

[0019] determining whether the detection value indicates that the child seat is used;

[0020] If so, then when the passenger status information indicates that there is only a single passenger in motion, it is determined that there is a child in the vehicle.

[0021] Optionally, the step of determining whether there is a child in the vehicle according to the detection value and the passenger status information includes:

[0022] When the detection value indicates that there is no passenger in the non-child seat area, the detection value indicates that the child seat is used, and the passenger status information shows that there is only a single passenger in motion, it is determined that there are only children in the vehicle.

[0023] Optionally, the step of initiating a child left behind alarm includes:

[0024] Controlling the lamps and speakers of the vehicle to operate so as to initiate an audible and visual alarm;

[0025] Alternatively, a pre-stored mobile terminal number of the vehicle owner is obtained, and a child-left-behind warning is initiated to the mobile terminal corresponding to the mobile terminal number.

[0026] Optionally, after the step of initiating a child left behind alarm, the method further comprises:

[0027] Real-time statistics of the alarm duration are collected, and when the alarm duration is longer than a preset safety duration, detection is performed to determine whether the current state of the vehicle satisfies the child-left-behind release requirement;

[0028] If not, an alarm is triggered, and the vehicle is controlled to lower the windows, turn on ventilation or air conditioning.

[0029] In a second aspect, an embodiment of the present invention provides a method for detecting a child left behind, which is applied to an on-board device of a vehicle, wherein the on-board device is communicatively connected to a WiFi module on a child seat of the vehicle via WiFi, and the WiFi module is communicatively connected to a detection device on the child seat, and the method comprises:

[0030] Sending a wifi signal to the wifi module; wherein the wifi signal is used to instruct the wifi module to return the passenger status information of the child seat obtained from the channel status information of the wifi signal;

[0031] Receiving the passenger status information of the child seat sent by the wifi module;

[0032] Obtaining the detection value sent by the wifi module, and judging whether there is a child in the vehicle according to the detection value and the passenger status information; wherein the detection value is the detection data of the current use of the child seat and / or the detection data of the non-child seat area by the detection device;

[0033] If yes, when it is detected that the vehicle is in a locked state or an engine-off state, it is determined that a child is left behind, and the vehicle is controlled to initiate a child-left-behind alarm.

[0034] In a third aspect, an embodiment of the present invention provides a child abandonment detection method, which is applied to a wifi module, wherein the wifi module is arranged on a child seat of a vehicle, wherein the child seat comprises a detection device and a wifi module, wherein the wifi module is communicatively connected to an on-board device of the vehicle via wifi, and the wifi module is communicatively connected to the detection device, wherein the method comprises:

[0035] When receiving a wifi signal sent by the vehicle-mounted device, detecting the wifi signal to obtain channel state information, and sending the channel state information to the vehicle-mounted device; or obtaining passenger state information of the child seat according to the channel state information, and sending the passenger state information to the vehicle-mounted device;

[0036] The detection value detected by the detection device is obtained, and the detection value is sent to the vehicle-mounted device to instruct the vehicle-mounted device to implement the child abandonment detection method as described in any one of the first aspect or the second aspect.

[0037] In a fourth aspect, an embodiment of the present invention provides a vehicle-mounted device, comprising a processor and a memory, wherein the memory stores machine executable instructions that can be executed by the processor, and the processor can execute the machine executable instructions to implement a child abandonment detection method as described in either the first aspect or the second aspect.

[0038] In the fifth aspect, an embodiment of the present invention provides a child seat, comprising a seat body, and a wifi module and a detection device arranged on the seat body, wherein the wifi module is communicatively connected to a vehicle-mounted device via wifi, and the wifi module is communicatively connected to the detection device, and the wifi module implements the child abandonment detection method as described in the third aspect.

[0039] In a sixth aspect, an embodiment of the present invention provides a child abandoned detection system, comprising the vehicle-mounted device as described in the fourth aspect, and the child seat as described in the fifth aspect.

[0040] In a seventh aspect, an embodiment of the present invention provides a storage medium having a computer program stored thereon, wherein when the computer program is executed by a processor, the child abandonment detection method as described in any one of the first aspect, the second aspect or the third aspect is implemented.

[0041] The child abandonment detection method, system, vehicle-mounted device, child seat and storage medium provided by the embodiment of the present invention include: when the vehicle-mounted device detects that the vehicle is in the off state, a wifi signal is sent to the wifi module on the child seat to instruct the wifi module to return the channel state information of the wifi signal; the vehicle-mounted device receives the channel state information sent by the wifi module, and obtains the passenger state information of the child seat according to the channel state information; the vehicle-mounted device obtains the detection value sent by the wifi module, and judges whether there is a child in the vehicle according to the detection value and the passenger state information; if so, the vehicle-mounted device determines that a child is abandoned when it detects that the vehicle is in the locked state or the off state, and controls the vehicle to initiate a child abandonment alarm. In this way, without the help of external detection equipment such as microwave radar and camera, it is possible to detect whether a child is abandoned in the vehicle and issue an alarm in time by relying only on the vehicle-mounted equipment inherent in the vehicle and the wifi module and detection equipment inherent in the child seat, which greatly reduces the cost of child abandonment detection.

[0042] At the same time, child abandonment identification is performed based on the channel status information of the WiFi signal sent between the WiFi module and the vehicle-mounted equipment, the vehicle locking state and the pressure on the child seat. The channel status information, vehicle locking and engine shutdown status and detection values ​​are not affected by object obstruction, viewing angle, etc., which greatly reduces or even eliminates interference errors, thereby improving the accuracy and reliability of child abandonment detection.

[0043] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, preferred embodiments are given below and described in detail with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0044] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments are briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without creative work.

[0045] Figure 1 One of the structural schematic diagrams of the child abandonment detection system provided by the embodiment of the present invention is shown.

[0046] Figure 2 The second structural schematic diagram of the child abandonment detection system provided by the embodiment of the present invention is shown.

[0047] Figure 3 A schematic structural diagram of an electronic device provided by an embodiment of the present invention is shown.

[0048] Figure 4One of the flow charts of the child abandonment detection method provided in the embodiment of the present invention is shown.

[0049] Figure 5 The second flowchart of the child abandonment detection method provided in the embodiment of the present invention is shown.

[0050] Figure 6 Shows Figure 4 One of the flowchart diagrams of some sub-steps of step S15.

[0051] Figure 7 Shows Figure 4 FIG. 2 is a flow chart of some sub-steps of step S15.

[0052] Figure 8 FIG3 shows a third flow chart of the method for detecting child abandonment provided in an embodiment of the present invention.

[0053] Fig. 9 FIG4 shows a fourth flow chart of the child abandonment detection method provided in an embodiment of the present invention.

[0054] Fig.10 FIG5 shows a fifth flow chart of the child abandonment detection method provided in an embodiment of the present invention.

[0055] Fig.11 The figure shows a schematic structural diagram of a child-left-behind detection device provided by an embodiment of the present invention.

[0056] Explanation of the accompanying drawings: 1000-child abandoned detection system; 10-vehicle; 20-vehicle-mounted equipment; 30-child seat; 310-detection equipment; 320-wifi module; 40-electronic device; 410-memory; 420-processor; 430-communication module; 50-child abandoned detection device; 510-transmitting module; 520-receiving module; 530-discrimination module; 540-alarm module. DETAILED DESCRIPTION

[0057] The following will be combined with the accompanying drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings here can be arranged and designed in various different configurations.

[0058] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention claimed for protection, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without making creative work are within the scope of protection of the present invention.

[0059] It should be noted that relational terms such as "first" and "second" are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0060] The child abandonment detection method provided by the embodiment of the present invention can be applied to Figure 1 and Figure 2 In the illustrated child abandonment detection system 1000 , the child abandonment detection system 1000 may include a vehicle 10 , a vehicle-mounted device 20 disposed on the vehicle 10 , and a child seat 30 .

[0061] The vehicle 10 includes functional systems such as an air conditioning system, a speaker, and a lighting system. The child seat 30 includes a detection device 310 and a WiFi module 320. The vehicle-mounted device 20 can be connected to the functional systems of the vehicle 10 through a CAN bus. The vehicle-mounted device 20 can include one or more WiFi antennas to communicate with the WiFi module 320 through WiFi. The detection device 310 is electrically connected to the WiFi module 320.

[0062] The detection device may be, but is not limited to, any of low-cost detection devices such as photoelectric switches, micro switches, proximity switches, pressure sensors, and infrared detectors. It should be noted that since the detection device is set on the child seat, the influence of the child seat being blocked or disturbed is eliminated.

[0063] Please refer to Figure 3 , is a block diagram of the electronic device 40, which can be Figure 1 The structure of the wifi module 320 or the vehicle-mounted device 20. The electronic device 40 includes a memory 410, a processor 420 and a communication module 430. The memory 410, the processor 420 and the communication module 430 are electrically connected to each other directly or indirectly to achieve data transmission or interaction. For example, these components can be electrically connected to each other through one or more communication buses or signal lines.

[0064] The memory 410 is used to store programs or data. The memory 410 may be, but is not limited to, a random access memory 410 (RAM), a read only memory 410 (ROM), a programmable read-only memory 410 (PROM), an erasable programmable read-only memory 410 (EPROM), an electrically erasable read-only memory 410 (ElectricErasable Programmable Read-Only Memory 410 (EEPROM), etc.

[0065] The processor 420 is used to read / write data or programs stored in the memory 410 and execute corresponding functions.

[0066] The communication module 430 is used to establish a communication connection between the electronic device 40 and other communication terminals through the network, and to send and receive data through the network.

[0067] It should be understood that Figure 3 The structure shown is only a schematic diagram of the structure of the electronic device 40. The vehicle electronic device 40 may also include Figure 3 More or fewer components as shown, or with Figure 3 Different configurations are shown. Figure 3 Each component shown in the figure can be implemented by hardware, software or a combination thereof.

[0068] Please refer to Figure 4 , provides a method for detecting child abandonment, comprising the following steps. In this embodiment, Figure 1 The vehicle-mounted device 20 is the execution subject of the following steps.

[0069] S11, sending a WiFi signal to the WiFi module.

[0070] The wifi signal is used to instruct the wifi module to return channel status information of the wifi signal.

[0071] S13, receiving the channel status information sent by the wifi module, and obtaining the passenger status information of the child seat according to the channel status information.

[0072] S15, obtaining the detection value sent by the wifi module, and judging whether there is a child in the vehicle according to the detection value and the passenger status information.

[0073] The detection value is detection data of the current use of the child seat by the detection device and / or detection data of the non-child seat area. The non-child seat area refers to the area in the vehicle space except the space where the child seat is located.

[0074] S17, if yes, when it is detected that the vehicle is in a locked state or an ignition-off state, it is determined that a child is left behind, and the vehicle is controlled to initiate a child left behind alarm.

[0075] For example, when the vehicle-mounted device 20 detects that the vehicle 10 enters the ignition-off state, the vehicle-mounted device 20 sends a WiFi signal. After the WiFi module 320 on the child seat 30 receives the WiFi signal, it detects the WiFi signal to obtain the channel status information of the communication channel, and sends the channel status information to the vehicle-mounted device 20.

[0076] It should be noted that when the wifi module 320 receives the wifi signal, it can control the detection device 310 on the child seat 30 to perform detection, obtain the detection value, and send the detection value and the channel status information to the vehicle-mounted device 20. Alternatively, the detection device 310 on the child seat 30 can detect the current use of the child seat 30 and / or the non-child seat area in real time to obtain the detection value (i.e., detection data). When the wifi module 320 receives the wifi signal, the wifi module 320 can extract the latest detection value currently detected by the detection device 310, and send the detection value and the channel status information to the vehicle-mounted device 20.

[0077] After the vehicle-mounted device 20 receives the channel status information returned by the wifi module 320, it obtains the passenger status information of the child seat 30 based on the channel status information, wherein the passenger status information may include the presence or absence of a carrier and the motion state of the carrier, and the motion state includes motion and stillness. The vehicle-mounted device 20 determines whether there is a child in the vehicle 10 based on the passenger status information and the received detection value. If so, it detects whether the vehicle 10 is in a locked state. When the vehicle 10 is in a locked state or an ignition-off state, it determines that a child has been left behind in the vehicle 10, controls the vehicle 10 to initiate a child left behind alarm, and promptly reminds the owner, rescuers, and pedestrians near the vehicle 10.

[0078] When the detection device 310 detects the situation in the non-child seat area, since the detection device 310 itself is a part of the child seat, it is not affected by shielding objects and obstacles. And when the detection device 310 detects the non-child seat area, if there are shielding objects or obstacles, the shielding objects or obstacles are the detection targets, which means that there are passengers in the non-child seat area, so it is not affected by shielding objects or obstacles. Even if it is interfered, with the help of the passenger status information obtained from the channel status information, the influence of some interference can still be eliminated.

[0079] In the existing child abandonment detection methods, microwave radars, cameras, infrared detection equipment, temperature sensors and other sensors are installed in the car to detect the child's breathing, temperature, mentality or behavior activities to determine whether the child is left in the car. Or accessories outside the vehicle, such as cameras and servers in the parking lot, are used to determine whether the child is left in the car. These two methods are costly, and when the line of sight of the detection equipment is blocked, it is difficult to detect, and there is a problem of low detection accuracy.

[0080] In addition, there is an existing method that builds a wireless local area network between the child seat, mobile phone and computer equipment (i.e., server, computer or car host), and identifies whether there is a living body in the child seat through the covariance of the subcarrier of the wireless signal sent between the child seat and the mobile phone, so as to remind the child to forget through the computer equipment. This method is difficult to implement once it is separated from the mobile phone and wireless local area network, and the wireless local area network, mobile phone and computer are expensive.

[0081] The child abandonment detection method provided in the embodiment of the present invention, through the above S11 to S17, does not require the use of mobile terminals such as mobile phones, wireless local area networks and other detection equipment, but only relies on the vehicle's inherent on-board equipment and the child seat's inherent wifi module and detection equipment to detect whether a child is abandoned. The cost of the wifi module and the detection equipment are low, which greatly reduces the cost of child abandonment detection.

[0082] In addition, the identification of children left behind is performed based on the channel status information of the WiFi signal sent between the WiFi module and the vehicle-mounted equipment, the vehicle lock and the pressure borne by the child seat. The channel status information, the vehicle lock status and the detection values ​​borne by the child seat are not affected by object occlusion, viewing angle, etc., which greatly reduces or even eliminates the interference error. Moreover, by detecting the child seat with the detection equipment, the influence of living things around the child seat can be eliminated, further reducing interference. Thus, the accuracy and reliability of child left behind detection are greatly improved.

[0083] In S13, the method of obtaining the passenger status information of the child seat can be flexibly set. For example, it can be obtained by identifying the channel status according to preset rules, or it can be obtained by identifying it using a machine learning model, which is not limited here.

[0084] The channel state information of the wifi signal generates a characteristic fingerprint in the frequency domain, that is, information such as the phase and signal strength of each subcarrier of the wifi signal. In the riding scenarios such as when there are children, static objects, and no passengers in the child seat, the transmission path and attenuation of the wifi signal will change, resulting in differences in the channel state information. Therefore, based on the channel state information received twice adjacently (i.e., the channel state information of the two adjacent wifi signals), the characteristic information such as the covariance, attenuation difference, phase difference, and time difference between the subcarriers of the wifi signal can be calculated, and then when any of the characteristic information meets the live body threshold, it is determined that there are moving passengers (i.e., live bodies) around the child seat, and the number of moving passengers can be determined.

[0085] Alternatively, based on the channel state information received in the previous adjacent time period of the current moment, characteristic graphs such as the attenuation fluctuation graph and the phase fluctuation graph of each subcarrier are drawn, and the characteristic graphs are input into a preset discrimination model to obtain the passenger state information output by the discrimination model.

[0086] It is also possible to pre-select and set the vehicle in a variety of riding scenarios (such as no passengers, stationary passengers, moving passengers and the number of passengers, etc.), calibrate the changes in the wifi signal between the vehicle-mounted device and the wifi module, obtain the fluctuation calibration features corresponding to each riding scenario (such as phase increase and decrease, attenuation increase and decrease, etc.), and store each fluctuation calibration feature and the riding scenario corresponding to the fluctuation calibration feature in a corresponding relationship. Thus, in S13, the fluctuation features of each subcarrier of the wifi signal between the vehicle-mounted device and the wifi module can be obtained based on the channel state information of the wifi signal received continuously for multiple times, and the fluctuation features can be matched with the pre-stored fluctuation calibration features, and the riding scenario corresponding to the successfully matched fluctuation calibration feature can be used as the passenger state information of the child seat.

[0087] In order to make the obtained passenger status information include rich information such as no passengers, stationary passengers, moving passengers and the number of passengers, and improve the accuracy of child left behind detection, the concept of machine learning is introduced. In S13, the channel state information can be processed using a pre-trained discriminant model to obtain the passenger state information of the child seat. The discriminant model is obtained by training the initial classification model based on sample pairs of various riding scenarios of child seats in the vehicle, and each sample pair includes the passenger state information and channel state information of the child seat.

[0088] The riding scenarios include a child seat with no carrier, a child seat with a stationary carrier, a child seat with a live carrier and no other living things in the car, and a child seat with a live carrier and other living things in the car. When obtaining sample pairs, the riding scenarios in the car can be configured under different riding scenarios, and after controlling the on-board equipment to initiate a WiFi signal to the WiFi module on the child seat, the channel state information of the WiFi channel detected by the WiFi module is obtained, and the channel state information is labeled with the passenger state information according to the riding scenario corresponding to the channel state information. In this way, multiple sample pairs are obtained. Please refer to Figure 5 The child left-behind detection method provided by the embodiment of the present invention further comprises the following steps: The discrimination model is obtained by training through the following steps.

[0089] S21, obtaining sample pairs of various seating scenarios of child seats in a vehicle.

[0090] S23, dividing all sample pairs into a training set, a validation set and a test set, and training the initial classification model based on the training set, the validation set and the test set to obtain a discriminant model.

[0091] The initial classification model may be any neural network model, and the initial classification model at least includes a feature extraction layer and a classification layer, which is not limited here.

[0092] In S21, the riding scenes in the car are configured under different riding scenes, and after controlling the vehicle-mounted device 20 to initiate a WiFi signal to the WiFi module 320 on the child seat 30, the channel state information of the WiFi channel detected by the WiFi module 320 is obtained, and the channel state information is subjected to data preprocessing such as denoising, phase calibration, and feature extraction. The preprocessed channel state information (which may also be feature information) is labeled to obtain sample pairs, wherein the labels of some sample pairs may be empty.

[0093] It should be noted that WiFi opens channel state information (CSI). Therefore, WiFi usually includes dozens, hundreds or even more subcarriers, and the channel state includes information such as the phase and signal strength of each subcarrier.

[0094] In S23, the sample pairs with empty labels are used as test sets, and the sample pairs with labels are divided into training sets and validation sets. Then, based on the training set, validation set and test set, the initial classification model is trained using algorithms such as Support Vector Regression (SVR) or K-Nearest Neighbors (KNN) to obtain a mature discriminant model.

[0095] Through the above S21 to S23, the discriminant model obtained can obtain the passenger status information of the child seat according to the input channel status information.

[0096] When the detection device 310 is a pressure sensor, the detection value is the pressure value of the child seat, that is, only the use condition (pressure) of the child seat is detected, please refer to Figure 6 , S15 may include the following steps.

[0097] S151A, determine whether the pressure value is within the preset child pressure range. If yes, execute step S152A, if not, execute S153A. Determine that no child is left behind.

[0098] The child pressure range represents the floating relationship between a scene with a child in the child seat and the pressure value detected by the detection device.

[0099] S152A, determining that there is a child in the child seat, and when the passenger status information indicates that there is only a single moving passenger, determining that there is a child in the vehicle.

[0100] S153A, it was determined that no children were left.

[0101] It should be understood that a moving passenger is an active, non-stationary passenger, and can also be understood as a living body. In S152A, the situations in which it is determined that there is a child in the vehicle include: (1) there is a child, and there may be other passengers; (2) there is only a child.

[0102] Through the above S151A to S153A, the presence of a child in the vehicle is determined only when it is determined that there is a child in the child seat and the passenger status information indicates that there is only a single moving passenger. Thus, by combining the detection on the child seat, the error or wrong judgment of the passenger status information caused by the moving object (i.e., living body) close to the child seat affecting the channel status information is eliminated, thereby greatly improving the accuracy of determining whether there is a child in the vehicle, which in turn helps to improve the accuracy of child abandonment detection.

[0103] When the detection device 310 is a device for detecting the use of the child seat, such as a micro switch, a photoelectric switch, or a proximity switch (also only detecting the use of the child seat (pressure)), the detection value is an electrical signal, and when the detection value is a high level, it indicates that the child seat is not in use, and when the detection value is a low level, it indicates that the child seat is in use. Figure 7 , S15 may include the following steps.

[0104] S151B, determining whether the detection value indicates that the child seat is used, if yes, executing S152B, if no, executing S153B.

[0105] S152B: When the passenger status information indicates that there is only a single moving passenger, determine that there is a child in the vehicle.

[0106] S153B, determined that no children were left.

[0107] In S152B, the situations in which it is determined that there is a child in the vehicle include: (1) there is a child and there may be other passengers; (2) there is only a child.

[0108] Through the above S151B to S153B, the presence of a child in the vehicle is determined only when it is determined that the child seat is in use and the passenger status information indicates that there is only a single moving passenger. Thus, by combining the detection of the use of the child seat, the error or wrong judgment of the passenger status information caused by the moving passenger (i.e., living person) close to the child seat affecting the channel status information is eliminated, thereby greatly improving the accuracy of determining whether there is a child in the vehicle, which in turn helps to improve the accuracy of child abandonment detection.

[0109] When the detection device 310 includes a photoelectric switch or infrared detector with a light beam outlet facing the surroundings of the child seat and a pressure sensor, a micro switch, a photoelectric switch, a proximity switch and other devices for detecting the use of the child seat, the detection values ​​include detection values ​​outside the seat and detection values ​​inside the seat.

[0110] Furthermore, the detection value outside the seat is an electrical signal. When the detection value outside the seat is a high level, it indicates that there are no passengers in the non-child area of ​​the vehicle. When the detection value outside the seat is a low level, it indicates that there are passengers in the non-child area of ​​the vehicle. In the case where the detection value inside the seat is a pressure value, when the pressure value is within the preset child pressure range, it indicates that the child seat is in use. In the case where the detection value inside the seat is an electrical signal emitted by a device such as a micro switch, a photoelectric switch, and a proximity switch, when the detection value inside the seat is a low level, it indicates that the child area of ​​the vehicle is in use. When the detection value inside the seat is a high level, it indicates that the child seat of the vehicle is not in use. At this time, in S15, it can be determined that there are only children in the vehicle when the detection value indicates that there are no passengers in the non-child seat area, the detection value indicates that the child seat is in use, and the passenger status information indicates that there is only a single moving passenger.

[0111] At this time, the detection device 310 can be set in an unobstructed area such as the top of the child seat. The process of controlling the vehicle to initiate a child left behind warning in S17 can be flexibly set, for example, it can be controlling the vehicle to sound an alarm, it can also be controlling the vehicle to light an alarm, or it can be controlling the vehicle to warn the owner, which is not limited here.

[0112] In order to make timely and targeted alarms to help rescue abandoned children in time and reduce safety hazards, when the on-board equipment in S17 determines that a child is left behind in the vehicle, it can control the vehicle's lights and speakers to work to initiate an audible and visual alarm.

[0113] The lamps are any of front and rear position lamps, clearance lamps, side marker lamps, etc. in the lighting system of the vehicle 10 .

[0114] Alternatively, the vehicle-mounted device may pre-store the mobile terminal number (i.e., mobile phone number, WeChat ID, or other social account) of the vehicle owner (i.e., the vehicle owner and the owner's relatives). When it is determined that a child is left behind in the vehicle, the vehicle-mounted device obtains or retrieves the pre-stored mobile terminal number of the vehicle owner and initiates a child-left-behind warning to the mobile terminal corresponding to the mobile terminal number. The forms of initiating a child-left-behind warning include, but are not limited to: calls, text messages, and prompt information of social account, etc.

[0115] To further reduce the safety risks left behind by children and eliminate potential safety hazards, please refer to Figure 8 The child abandonment detection method provided in the embodiment of the present invention may further include S18 and S19, where S18 is executed after S17.

[0116] S18, real-time statistics of the alarm duration, and when the alarm duration is longer than the preset safety duration, detection of whether the current state of the vehicle satisfies the child left behind release.

[0117] S19, if not, an alarm is triggered, and the vehicle is controlled to lower the windows, turn on ventilation or air conditioning.

[0118] Among them, the safety time can represent the corresponding relationship between the life safety in the car and the time the child is left behind. The life safety in the car can be understood as the safety caused by factors affecting life safety such as the remaining oxygen content and temperature value in the car. When the alarm time is greater than the safety time, it indicates that the children in the car have begun to enter a safety risk period.

[0119] In S18, the method of detecting whether the current state of the vehicle satisfies the child left behind release can be flexibly set. For example, when it is detected that the vehicle door is reopened, it is determined that the child left behind release is satisfied. Alternatively, steps S11 to S17 can be re-executed to determine whether the child is still left behind. If not, the child left behind release is determined. This is not limited here.

[0120] The alarm in S19 refers to an alarm to an alarm receiving terminal of a relevant department (such as the police, fire department, etc.). Lowering the window, turning on the ventilation or air conditioning includes: (1) lowering the window; (2) turning on the ventilation or air conditioning, and different control strategies can be set according to different actual applications or needs. Lowering the window, turning on the ventilation or air conditioning is only an example and is not limited here.

[0121] In order to improve the accuracy of child abandonment detection, it is also possible to identify whether there is a child sitting in the child seat 30 by combining the detection value borne by the child seat 30 and the channel state information of the Wi-Fi communication channel between the vehicle-mounted device 20 and the Wi-Fi module 320 on the child seat 30. Based on this, the child abandonment detection method may include the following steps.

[0122] S10, when it is detected that the vehicle enters the ignition-off state, a wifi signal is sent to the wifi module, wherein the wifi signal is used to instruct the wifi module to return the channel state information of the wifi signal and the detection value of the detection device.

[0123] S12, receiving the channel status information and detection value sent by the wifi module, using the channel status information and detection value as input of a preset child recognition model, and obtaining the child passenger status information through processing by the child recognition model.

[0124] S14, when the child passenger status information indicates that there is only a child in the vehicle, if the vehicle is in a locked state, it is determined that a child is left behind, and the vehicle is controlled to initiate a child left behind alarm.

[0125] After S10 is executed, the wifi module 320 of the child seat 30 receives the wifi signal, obtains the channel state information of the wifi signal, and sends a detection instruction to the detection device 310 of the child seat 30 to obtain the detection value currently detected by the detection device 310. Then, the wifi module 320 sends the channel state information and the detection value to the vehicle-mounted device 20.

[0126] After receiving the channel state information and the detection value, the vehicle-mounted device 20 inputs the channel state information and the detection value into a pre-trained child recognition model to obtain the child passenger state information in the vehicle.

[0127] Among them, after the riding scenes in the car are configured in different riding scenes, the channel state information and the detection value of the child seat 30 in each riding scene are obtained, the channel state information and the child seat 30 are used as data groups, and labels are set for the data groups according to the riding scenes to obtain sample pairs, and then based on the obtained multiple sample pairs, the initial recognition model is trained to obtain a child recognition model.

[0128] Through the above steps, the child recognition model is trained with samples containing channel state information and detection values ​​to obtain the child passenger state information of the vehicle, so that the input data of the child recognition model contains more data information (that is, more characteristic information of the riding scene), thereby making the passenger state information more accurate, improving the reliability and accuracy of the child passenger state information, and thus helping to improve the accuracy of child abandonment detection.

[0129] Based on the same inventive concept as the above-mentioned child left-behind detection method, Fig. 9 , and also provides a method for detecting child abandonment, comprising the following steps, the execution subject of the following steps is Figure 1 The vehicle-mounted device 20.

[0130] S31, sending a WiFi signal to the WiFi module.

[0131] The wifi signal is used to instruct the wifi module to return the passenger status information of the child seat obtained from the channel status information of the wifi signal.

[0132] S33, receiving the passenger status information of the child seat sent by the wifi module.

[0133] S35, obtaining the detection value sent by the wifi module, and judging whether there is a child in the vehicle according to the detection value and the passenger status information.

[0134] The detection value is detection data of the current use of the child seat by the detection device and / or detection data of the non-child seat area.

[0135] S37, if yes, when it is detected that the vehicle is in a locked state or an ignition-off state, it is determined that a child is left behind, and the vehicle is controlled to initiate a child left behind alarm.

[0136] After executing S31, the wifi model receives the wifi signal. At this time, the wifi model obtains the channel state information of the wifi signal and inputs the channel state information into the preset discrimination model. The discrimination model processes the signal state information to obtain the corresponding passenger state information of the child seat 30. At the same time, the wifi module 320 controls the detection device 310 to perform detection and obtain the current detection value. Then, the passenger state information and the detection value are returned to the vehicle-mounted device 20 together.

[0137] The specific implementation and effect of S35 refer to the specific implementation and effect of S15 above, and the specific implementation and effect of S37 refer to the specific implementation and effect of S17 above, which will not be repeated here.

[0138] Please refer to Fig.10 , a method for detecting child abandonment is also provided, comprising the following steps. In this embodiment, the execution subject of the following steps is Figure 1 The wifi module 320 in it.

[0139] S41, when receiving a Wi-Fi signal sent by the vehicle-mounted device, the Wi-Fi signal is detected to obtain channel state information, and the channel state information is sent to the vehicle-mounted device.

[0140] Among them, the wifi signal is sent by the vehicle-mounted equipment when it detects that the vehicle is in the off state.

[0141] S43, obtaining the passenger status information of the child seat according to the channel status information, and sending the passenger status information to the vehicle-mounted device.

[0142] S45, acquiring the detection value detected by the detection device, and sending the detection value to the vehicle-mounted device to instruct the vehicle-mounted device to implement the child abandonment detection method in which the execution subject is the vehicle-mounted device as described above.

[0143] Among them, S41 and S43 are parallel solutions, and either one can be executed. It should be noted that the process of obtaining the passenger status information of the child seat according to the channel status information in S43 can be: inputting the channel status information into a preset discrimination model, and the discrimination model processes the signal state information to obtain the corresponding passenger status information of the child seat.

[0144] The process of obtaining the discriminant model refers to the process from S21 to S23 above, which will not be repeated here.

[0145] Through the above S41 to S45, when the WiFi module 320 receives the WiFi signal sent by the vehicle-mounted device 20, it immediately obtains the channel status information and the detection value of the child seat 30, and sends the child seat 30 and the channel status information or the passenger status information of the child seat 30 corresponding to the channel status information to the vehicle-mounted device 20, so that the vehicle-mounted device 20 can detect whether there is a child left in the vehicle 10.

[0146] In this way, there is no need to use external detection equipment such as microwave radar and camera. Only relying on the vehicle's inherent onboard equipment and the child seat's inherent wifi module and detection equipment can detect whether a child is left behind in the vehicle and issue an alarm in time, greatly reducing the cost of child left behind detection. The channel status information, vehicle lock status and the detection values ​​of the child seat are not affected by object occlusion, viewing angle, etc., which greatly reduces or even eliminates interference errors, thereby improving the accuracy and reliability of child left behind detection.

[0147] Please refer to Fig.11 The embodiment of the present invention provides a child left behind detection device 50, which is applied to Figure 1 In the vehicle-mounted device 20 , the child abandonment detection device 50 includes a sending module 510 , a receiving module 520 , a determining module 530 and an alarm module 540 .

[0148] The sending module 510 is used to send a WiFi signal to the WiFi module, wherein the WiFi signal is used to instruct the WiFi module to return channel status information of the WiFi signal.

[0149] The receiving module 520 is used to receive the channel status information sent by the wifi module 320, and obtain the passenger status information of the child seat according to the channel status information.

[0150] The determination module 530 is used to obtain the detection value sent by the wifi module, and determine whether there is a child in the vehicle according to the detection value and the passenger status information. The detection value is the detection data of the current use of the child seat by the detection device and / or the detection data of the non-child seat area. The non-child seat area refers to the area in the vehicle space except the space where the child seat is located.

[0151] The alarm module 540 is used to determine that a child is left behind when it is detected that the vehicle is in a locked state or an ignition-off state, and control the vehicle to initiate a child-left-behind alarm.

[0152] The child left-behind detection device 50 may also include a model acquisition module for acquiring sample pairs of various riding scenarios of the child seat 30 in the vehicle 10, dividing all sample pairs into a training set, a verification set and a test set, and training an initial classification model based on the training set, the verification set and the test set to obtain a discriminant model.

[0153] The above-mentioned child-left-behind detection device 50, through the synergistic effect of the sending module 510, the receiving module 520, the distinguishing module 530 and the alarm module 540, performs child-left-behind identification based on the channel state information of the wifi signal sent between the wifi module and the vehicle-mounted equipment, the vehicle lock and the detection value. The channel state information, the vehicle lock state and the detection value are not affected by the obstruction of objects, the viewing angle, etc., which greatly reduces or even eliminates the interference error, thereby improving the accuracy and reliability of child-left-behind detection. At the same time, without the use of external detection equipment such as microwave radars and cameras, it can detect whether a child has been left behind in the vehicle and issue an alarm in a timely manner by relying only on the vehicle's inherent vehicle-mounted equipment and the wifi module and detection equipment inherent in the child seat, which greatly reduces the cost of child-left-behind detection.

[0154] In addition, the specific implementation of the receiving module 520 can also be adjusted as follows: the receiving module 520 is used to receive the passenger status information of the child seat sent by the wifi module.

[0155] At this time, when the wifi model receives the wifi signal sent by the vehicle-mounted device 20, it obtains the channel state information of the wifi signal, and obtains the passenger state information of the child seat 30 based on the channel state information. The specific implementation and effect of the wifi module 320 obtaining the passenger state information of the child seat 30 can be seen in the description of S43 above, which will not be repeated here.

[0156] The embodiment of the present invention further provides a child left behind detection device 50, which is applied to Figure 1 The wifi module 320 of the child seat 30, the child abandoned detection device 50 includes a first transceiver module and a second transceiver module.

[0157] The first transceiver module is used to detect the WiFi signal when receiving the WiFi signal sent by the vehicle-mounted device 20, obtain channel state information, and send the channel state information to the vehicle-mounted device 20.

[0158] Alternatively, the first transceiver module is used to obtain the passenger status information of the child seat 30 according to the channel status information, and send the passenger status information to the vehicle-mounted device 20 .

[0159] The second transceiver module is used to obtain the detection value detected by the detection device 310 and send the detection value to the vehicle-mounted device 20 to instruct the vehicle-mounted device 20 to implement the child abandonment detection method in which the execution subject is the vehicle-mounted device 20 as described above.

[0160] For the specific implementation and effect of the child abandonment detection device 50, please refer to the description of the implementation of the child abandonment detection method in the above text, such as, for the specific implementation and effect of the sending module 510, please refer to the description of S11 in the above text, for the specific implementation and effect of the receiving module 520, please refer to the description of S13 or S33 and its related sub-steps in the above text, for the specific implementation and effect of the determination module 530, please refer to the description of S15 and related sub-steps in the above text, for the specific implementation and effect of the alarm module 540, please refer to the description of S17 and related sub-steps in the above text, for the specific implementation and effect of the model acquisition module, please refer to the description of S21 to S23 in the above text, for the specific implementation and effect of the first transceiver module, please refer to the description of S41 or S43 in the above text, for the specific implementation and effect of the second transceiver module, please refer to the description of S45 in the above text, and no further details will be given here.

[0161] Each module in the child-left-behind detection device 50 can be implemented in whole or in part by software, hardware, or a combination thereof. Figure 3 The processor 420 in the electronic device 40 may also be stored in the memory 410 of the electronic device 40 in the form of software, so that the processor 420 can call and execute the operations corresponding to the above modules. At the same time, the data and program codes required to execute the above modules may be stored in the memory 410.

[0162] An embodiment of the present invention also provides a vehicle-mounted device 20, including a processor 420 and a memory 410, wherein the memory 410 stores machine executable instructions that can be executed by the processor 420, and the processor 420 can execute the machine executable instructions to implement the child abandonment detection method proposed above, in which the execution subject is the vehicle-mounted device 20.

[0163] An embodiment of the present invention also provides a child seat 30, including a seat body, and a wifi module 320 and a detection device 310 arranged on the seat body, the wifi module 320 is communicatively connected to the vehicle-mounted device 20 of the vehicle 10 via wifi, the wifi module 320 is communicatively connected to the detection device 310, and the wifi module 320 implements the child abandonment detection method proposed above, in which the execution subject is the wifi module 320.

[0164] The embodiment of the present invention also provides a child abandonment detection system 1000 , comprising the vehicle-mounted device 20 and the child seat 30 as provided above.

[0165] The embodiment of the present invention also provides a storage medium on which a computer program is stored. When the computer program is executed by the processor 420, any one of the child abandonment detection methods described above is implemented.

[0166] In summary, the child abandoned detection method, system, vehicle-mounted device 20, child seat 30 and storage medium provided by the embodiments of the present invention have the following effects: (1) a child abandoned detection system 1000 consisting of a child safety seat with WiFi communication and a vehicle 10 with WiFi communication is established without introducing other detection equipment, which greatly reduces the cost; (2) the presence or absence of a carrier is determined by the entry and exit of the child safety seat (realized by detection value), the child is determined by the structural characteristics of the child safety seat, and the channel state information of the WiFi signal is used to identify the behavioral characteristics to identify the living body (and the moving carrier), thereby reducing or even eliminating interference errors and improving the accuracy and reliability of child abandoned detection.

[0167] In several embodiments provided in the present application, it should be understood that the disclosed devices and methods can also be implemented in other ways. The device embodiments described above are merely schematic. For example, the flowcharts and block diagrams in the accompanying drawings show the possible architecture, functions and operations of the devices, methods and computer program products according to multiple embodiments of the present invention. In this regard, each box in the flowchart or block diagram can represent a module, a program segment or a part of a code, and the module, a program segment or a part of a code contains one or more executable instructions for implementing the specified logical function. It should also be noted that in some alternative implementations, the functions marked in the box can also occur in a different order from the order marked in the accompanying drawings. For example, two consecutive boxes can actually be executed substantially in parallel, and they can sometimes be executed in the opposite order, depending on the functions involved. It should also be noted that each box in the block diagram and / or flowchart, and the combination of boxes in the block diagram and / or flowchart can be implemented with a dedicated hardware-based system that performs a specified function or action, or can be implemented with a combination of dedicated hardware and computer instructions.

[0168] In addition, the functional modules in the various embodiments of the present invention may be integrated together to form an independent part, or each module may exist independently, or two or more modules may be integrated to form an independent part.

[0169] If the functions are implemented in the form of software function modules and sold or used as independent products, they can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present invention, or the part that contributes to the prior art or the part of the technical solution, can be embodied in the form of a software product. The computer software product is stored in a storage medium, including several instructions for enabling a computer device (which can be a personal computer, a server, or a network device, etc.) to perform all or part of the steps of the methods described in each embodiment of the present invention. The aforementioned storage medium includes: various media that can store program codes, such as a USB flash drive, a mobile hard disk, a read-only memory 410 (ROM), a random access memory 410 (RAM), a magnetic disk or an optical disk.

[0170] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A method for detecting child abandonment, characterized in that: An on-board device applied to a vehicle, wherein the on-board device is communicatively connected to a wifi module on a child seat of the vehicle via wifi, and the wifi module is communicatively connected to a detection device on the child seat, and the method comprises: Sending a wifi signal to the wifi module; wherein the wifi signal is used to instruct the wifi module to return channel status information of the wifi signal; receiving the channel status information sent by the wifi module, and obtaining the passenger status information of the child seat according to the channel status information; Obtaining the detection value sent by the wifi module, and judging whether there is a child in the vehicle according to the detection value and the passenger status information; wherein the detection value is the detection data of the current use of the child seat and / or the detection data of the non-child seat area by the detection device; If yes, when it is detected that the vehicle is in a locked state or an engine-off state, it is determined that a child is left behind, and the vehicle is controlled to initiate a child left behind alarm; The step of obtaining the passenger status information of the child seat according to the channel status information comprises: The channel state information is processed using a pre-trained discriminant model to obtain the passenger state information of the child seat; wherein the passenger state information includes no passengers, stationary passengers and moving passengers; the discriminant model is obtained by training an initial classification model based on sample pairs of various riding scenarios of child seats in a vehicle, and each of the sample pairs includes the passenger state information and channel state information of the child seat.

2. The method for detecting child abandonment according to claim 1, characterized in that: Before the step of sending a WiFi signal to the WiFi module, the method further includes: Obtain sample pairs of multiple seating scenarios of child seats in a vehicle; All sample pairs are divided into a training set, a validation set and a test set, and an initial classification model is trained based on the training set, the validation set and the test set to obtain a discriminant model.

3. The method for detecting child abandonment according to claim 1, characterized in that: When the detection value is a pressure value, the step of determining whether there is a child in the vehicle according to the detection value and the passenger status information includes: Determine whether the detected value is within a preset child pressure range; wherein the child pressure range represents a floating relationship between a scene in which there is a child on the child seat and the pressure value detected by the detection device; If so, it is determined that there is a child in the child seat, and when the passenger state information indicates that there is only a single passenger in motion, it is determined that there is a child in the vehicle.

4. The method for detecting child abandonment according to claim 1, characterized in that: The step of determining whether there is a child in the vehicle according to the detection value and the passenger status information comprises: determining whether the detection value indicates that the child seat is used; If so, then when the passenger status information indicates that there is only a single passenger in motion, it is determined that there is a child in the vehicle.

5. The method for detecting child abandonment according to claim 1, characterized in that: The step of determining whether there is a child in the vehicle according to the detection value and the passenger status information comprises: When the detection value indicates that there is no passenger in the non-child seat area, the detection value indicates that the child seat is used, and the passenger status information shows that there is only a single passenger in motion, it is determined that there are only children in the vehicle.

6. The method for detecting child abandonment according to any one of claims 1 to 5, characterized in that: The step of initiating a child left behind alert includes: Controlling the lamps and speakers of the vehicle to operate so as to initiate an audible and visual alarm; Alternatively, a pre-stored mobile terminal number of the vehicle owner is obtained, and a child-left-behind warning is initiated to the mobile terminal corresponding to the mobile terminal number.

7. The method for detecting child abandonment according to claim 6, characterized in that: After the step of initiating a child left behind alarm, the method further includes: Real-time statistics of the alarm duration are collected, and when the alarm duration is longer than a preset safety duration, detection is performed to determine whether the current state of the vehicle satisfies the child-left-behind release requirement; If not, an alarm is triggered, and the vehicle is controlled to lower the windows, turn on ventilation or air conditioning.

8. A method for detecting child abandonment, characterized in that: The vehicle-mounted device is applied to a vehicle, the vehicle-mounted device is connected to a wifi module on a child seat of the vehicle via wifi, the wifi module is connected to a detection device on the child seat via wifi, and the method includes: Sending a wifi signal to the wifi module; wherein the wifi signal is used to instruct the wifi module to return the passenger status information of the child seat obtained from the channel status information of the wifi signal; Receiving the passenger status information of the child seat sent by the wifi module; Obtaining the detection value sent by the wifi module, and judging whether there is a child in the vehicle according to the detection value and the passenger status information; wherein the detection value is the detection data of the current use of the child seat and / or the detection data of the non-child seat area by the detection device; If yes, when it is detected that the vehicle is in a locked state or an engine-off state, it is determined that a child is left behind, and the vehicle is controlled to initiate a child left behind alarm; The wifi module uses a pre-trained discriminant model to process the channel state information to obtain the passenger state information of the child seat; wherein the passenger state information includes no passengers, stationary passengers and moving passengers; the discriminant model is obtained by training an initial classification model based on sample pairs of various riding scenarios of child seats in the vehicle, and each of the sample pairs includes the passenger state information and channel state information of the child seat.

9. A method for detecting child abandonment, characterized in that: Applied to a wifi module, the wifi module is arranged on a child seat of a vehicle, the child seat comprises a detection device and a wifi module, the wifi module is communicatively connected with an onboard device of the vehicle via wifi, the wifi module is communicatively connected with the detection device, and the method comprises: When receiving a wifi signal sent by the vehicle-mounted device, detecting the wifi signal to obtain channel state information, and sending the channel state information to the vehicle-mounted device; or obtaining passenger state information of the child seat according to the channel state information, and sending the passenger state information to the vehicle-mounted device; Acquire the detection value detected by the detection device, and send the detection value to the vehicle-mounted device to instruct the vehicle-mounted device to implement the child abandonment detection method according to any one of claims 1 to 8; The step of obtaining the passenger status information of the child seat according to the channel status information comprises: The channel state information is processed using a pre-trained discriminant model to obtain the passenger state information of the child seat; wherein the passenger state information includes no passengers, stationary passengers and moving passengers; the discriminant model is obtained by training an initial classification model based on sample pairs of various riding scenarios of child seats in a vehicle, and each of the sample pairs includes the passenger state information and channel state information of the child seat.

10. A vehicle-mounted device, characterized in that: The invention comprises a processor and a memory, wherein the memory stores machine executable instructions that can be executed by the processor, and the processor can execute the machine executable instructions to implement the child-left-behind detection method according to any one of claims 1 to 8.

11. A child seat, characterized in that: It includes a seat body, and a wifi module and a detection device arranged on the seat body, the wifi module is communicatively connected to the vehicle's onboard equipment via wifi, the wifi module is communicatively connected to the detection device, and the wifi module implements the child abandonment detection method as described in claim 9.

12. A child left behind detection system, characterized in that: It comprises the vehicle-mounted device as claimed in claim 10, and the child seat as claimed in claim 11.

13. A storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by a processor, the child-left-behind detection method according to any one of claims 1 to 9 is implemented.

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