An intelligent child safety seat integrated with multi-sensory anti-car sickness function and a control method thereof

Abstract

The present application relates to the field of automobile child safety seats, in particular to an intelligent child safety seat integrated with multi-sensory anti-car sickness function and a control method, comprising: a seat body; a physiological sensing module, completely integrated in the seat body, used for contactless collection of physiological signals of children; a vehicle state acquisition module, used for real-time acquisition of driving state information of the vehicle through an in-vehicle bus; a multi-sensory output module, used for providing composite stimulation containing only hearing, touch and smell; a control module, connected with the physiological sensing module, the vehicle state acquisition module and the multi-sensory output module respectively; the child safety seat and the control method constitute a complete closed-loop adaptive system from scene recognition, car sickness prediction, mode switching, strategy execution to effect monitoring, completely liberate the driver from the dangerous operation of adjusting the rear equipment in the driving process, greatly reduce the secondary distraction caused by operation, and fundamentally improve the driving safety.

Description

Technical Field

[0001] This invention relates to the field of car child safety seats, specifically an intelligent child safety seat and control method that integrates multi-sensory anti-motion sickness functions. Background Technology

[0002] With the increasing popularity of cars and child car seats, people have higher and higher demands for the functionality of child car seats. In particular, the demand for entertainment features in child car seats is becoming more prominent, as most children have some degree of aversion to being restrained or having their behavior restricted. Child car seats are the core device for ensuring children's safety while traveling in a car. To address issues such as crying and boredom during car rides, parents often install tablets in the back seat or use in-car entertainment screens to play animations to distract children. In addition, some high-end child seats on the market have begun to integrate simple music playback or vibration soothing functions, attempting to provide a certain degree of comfort for children when restrained (such as the anti-motion sickness and anti-spitting-up smart child safety seat and its usage method described in CN202610548041.7). However, the above-mentioned existing solutions still have the following significant drawbacks: First, while installing screens to display dynamic images is currently the most common way parents soothe their children, it actually becomes a major trigger for motion sickness. During vehicle movement, the moving images on the screen are not aligned with the direction of the inertial forces generated by the vehicle's actual acceleration, deceleration, and turning, further amplifying the visual-vestibular mismatch signal. Studies have confirmed that dynamic visual content can increase the incidence of motion sickness by more than 30%. Simultaneously, screen light reflected onto the windshield and side windows easily distracts the driver, and the sound from the speakers also constitutes auditory pollution in the cabin, creating a driving safety hazard. Secondly, while some child seat products with simple soothing functions (such as playing fixed music or single-frequency vibration) are aware of the negative impact of the screen, their functional design is too rudimentary: they only support manual button switching by parents, cannot sense the child's real-time physiological state, and cannot automatically adjust the output strategy according to the vehicle's driving scenario. In special environments such as sudden changes in light and dark in tunnels, sudden thunderstorms, or continuous howling sandstorms, fixed-mode music or vibration may actually aggravate a child's startle reflex and discomfort. Third, existing products lack the ability to systematically adapt to all driving scenarios. During high-speed cruising, it's necessary to help children develop anticipation of movement to reduce vestibular strain; during congested traffic, it's necessary to counteract the discomfort caused by frequent starts and stops; during tunnel passage, it's necessary to smoothly mitigate sudden environmental changes; when parked and leaving the vehicle unattended, remote monitoring and early warning are needed; during thunderstorms, it's necessary to shield children from sudden loud noises and stabilize their emotions; and during sandstorms, it's necessary to prioritize respiratory health and provide a sense of security through touch. The needs for soothing strategies in these scenarios are fundamentally different, but existing products cannot identify these scenarios or provide differentiated responses. Fourth, current technical solutions lack adaptive strategies for child seats in special weather scenarios such as thunderstorms and sandstorms. Sudden thunder during thunderstorms can easily trigger a child's startle reflex, while the mixture of sand and fragrance particles during sandstorms may induce allergies or respiratory irritation. These special scenarios place drastically different demands on the combination of multi-sensory outputs and the rules of contraindication, and existing products completely lack the awareness and ability to address these challenges. Summary of the Invention

[0003] The main objective of this invention is to provide an intelligent child safety seat and control method that integrates multi-sensory anti-motion sickness functions. This child safety seat and control method constitute a complete closed-loop adaptive system from scene recognition, motion sickness prediction, mode switching, strategy execution to effect monitoring. It completely frees the driver from the dangerous operation of adjusting rear-seat equipment while driving, greatly reduces secondary distraction caused by operation, and fundamentally improves driving safety.

[0004] To achieve the above objectives, the present invention adopts the following technical solution: A smart child safety seat integrating multi-sensory anti-motion sickness function includes: a seat body; a physiological sensing module, fully integrated into the seat body, for non-contact acquisition of the child's physiological signals, including at least heart rate and body movement signals; a vehicle status acquisition module, for real-time acquisition of vehicle driving status information via an in-vehicle bus; a multi-sensory output module, fully integrated into the seat body, for providing composite stimulation including only hearing, touch, and smell, and the seat body and multi-sensory output module do not have any image display screen; and a control module connected to the physiological sensing module, the vehicle status acquisition module, and the multi-sensory output module respectively. The control module is configured to: identify the current driving scenario based on driving status information, and determine whether the child is experiencing motion sickness precursors based on physiological signals; based on the identified driving scenario and the motion sickness precursor judgment result, automatically switch from multiple preset working modes, and control the multi-sensory output module to execute the auditory-tactile-olfactory composite strategy corresponding to the current mode; When motion sickness precursors are detected, the control module forcibly switches to the vestibular soothing mode with the highest interrupt priority, driving the multi-sensory output module to simultaneously output rhythmic white noise, 0.5-2Hz low-frequency wave-like vibration of the backrest area, and soothing fragrance, completing active vestibular intervention before the onset of nausea and vomiting symptoms, thus achieving early prevention of motion sickness precursor symptoms. The physiological sensing module includes a flexible fabric sensor embedded in the headrest, chest and abdomen padding of the five-point seat belt, and surface of the seat cushion, as well as a millimeter-wave bio-radar embedded in the center of the backrest. The flexible fabric sensor is used to collect the child's body movement amplitude and skin conductance, while the millimeter-wave bio-radar is used for non-contact monitoring of heart rate and respiratory rate. The two work together to achieve completely imperceptible four-dimensional physiological signal acquisition.

[0005] Furthermore, the criteria for judging motion sickness precursors are as follows: when the control module analyzes that the heart rate suddenly increases beyond the baseline value without external stimulation, breathing becomes shallow and rapid, skin conductance level increases significantly and body twisting amplitude increases, and any two or more of the above four indicators are met, it is judged as motion sickness precursors.

[0006] Furthermore, the vehicle status acquisition module acquires vehicle speed, steering angle, longitudinal / lateral acceleration, braking signal, GPS positioning information, light status, and door lock status in real time through the in-vehicle CAN bus interface. At the same time, the vehicle status acquisition module also independently connects to three types of environmental signals: windshield wiper working status, external light intensity sensor, and particulate matter concentration sensor. The vehicle status acquisition module has built-in multi-dimensional cross-validation scene recognition logic to accurately distinguish the following seven driving scenarios: highway cruising, congested crawling, tunnel passage, cornering, parking with people away, thunderstorm weather, and sandstorm weather.

[0007] Furthermore, the multi-sensory output module is integrated into the seat body by physical output channels; the physical output channels are auditory channels, tactile channels, and olfactory channels.

[0008] Furthermore, the auditory channel consists of ultra-near-field directional speakers integrated on both sides of the headrest, whose emitted sound waves form a private sound bubble that is clearly audible only near the child's ears; the tactile channel consists of a wide-frequency linear vibration motor array distributed inside the backrest and seat cushion, each motor being independently programmable and capable of synthesizing a rich tactile texture ranging from gentle touches to continuous wave-like vibrations, with the anti-dizziness core frequency range being 0.5-2Hz; the olfactory channel is composed of a multi-channel fragrance box and a ventilation component linked together, with the fragrance box pre-filled with anti-dizziness or soothing fragrance cores, and the ventilation component adjusting the airflow intensity and internal / external circulation mode according to instructions to directionally deliver fragrance particles to the child's face.

[0009] Furthermore, the precise correspondence between the preset driving scenarios and the multi-sensory composite strategy within the control module includes: in high-speed cruise mode, all visual dynamic content is disabled, and only immersive story audio is played through the directional speakers. At the same time, the vibration motor array is controlled to dynamically generate predictable, gentle tactile beats that are in sync with the vehicle's acceleration and deceleration based on real-time vehicle speed and acceleration, helping the child's vestibular system establish motor expectations; in congested crawling mode, the directional speakers are controlled to start a voice interactive game and guide deep abdominal breathing, the vibration motor array generates slow wave vibrations of 0.8-1.2Hz transmitted from the rear of the seat to the front to counteract start-stop discomfort, the multi-channel fragrance box releases anti-dizziness fragrance, and the ventilation components assist in delivery with low-speed airflow.

[0010] Furthermore, in tunnel driving mode, the ambient lighting is pre-adjusted to a very weak warm light based on GPS and light signals. The directional speakers switch to low-frequency soothing music and add a calming voiceover. The vibration units on both sides of the backrest alternately vibrate to simulate the feeling of branches and leaves brushing past, smoothly transforming sudden environmental changes into a game-like experience. In curve driving mode, the directional speakers play rhythmic white noise to maintain auditory environment stability, and the vibration motor array outputs progressive side vibration cues in the opposite direction to the vehicle's centrifugal force to help the child's vestibular system anticipate changes in lateral acceleration. At the same time, a low concentration of minty fragrance is released to maintain alertness. In parked and unattended mode, the directional speakers are controlled to play pre-recorded calming voices from parents in a loop, the vibration motor array provides low-frequency soothing touches, and the wireless communication module pushes real-time heart rate, respiratory rate, and in-vehicle temperature data to the parent's mobile phone. When abnormal vital signs or high temperature are detected, it automatically escalates to an emergency alarm.

[0011] Furthermore, in thunderstorm weather mode, the directional speaker plays low-frequency rain white noise with dynamic masking processing to cover up the external thunder, the vibration motor array outputs continuous cradle vibration at 0.8-1.5Hz, the soft ambient light strip is adjusted to the darkest warm yellow, and the multi-channel fragrance box releases lavender-like soothing fragrance. If a sudden increase in heart rate is detected, the vibration amplitude is temporarily increased and a soothing voice from a mother is added. In sandstorm weather mode, the control module first closes the external air intake of the ventilation component and pauses the fragrance release to protect the respiratory tract. The directional speaker increases the volume to play calming rhythm music or repetitive nursery rhymes to mask the howling sandstorm, the vibration motor array outputs a pressing hugging tactile sensation, and at the same time, it issues a pre-vibration prompt in advance during frequent braking to assist vestibular prediction.

[0012] Furthermore, the control module is also connected to a directional microphone array and a six-axis inertial unit inside the seat; the directional microphone array is used to pick up the child's voice and identify the voiceprint emotion characteristics, and the six-axis inertial unit is used to detect the changes in the angular velocity and acceleration of the seat body in real time, thereby calculating the displacement amplitude of the child's body. The above information serves as redundant basis for assisting in judging the child's state and mode switching, improving the robustness of system decision-making.

[0013] The present invention also provides a control method based on the above-mentioned intelligent child safety seat, comprising the following steps: S1. Through a physiological sensing module fully integrated into the seat body, physiological signals of children, including at least heart rate and body movement signals, are collected without contact. S2. The vehicle status acquisition module obtains vehicle driving status information in real time via the CAN bus interface, and simultaneously reads three types of environmental signals: windshield wipers, sunlight, and particulate matter concentration. S3. The control module integrates driving status information and environmental signals to identify the current driving scenario, and at the same time determines whether the child is showing signs of motion sickness based on physiological signals. S4. Based on the current driving scenario and the judgment results of motion sickness symptoms, the control module automatically switches from multiple preset working modes and controls the multi-sensory output module integrated in the seat to execute the corresponding auditory-tactile-olfactory composite strategy. No image display screen is enabled during the entire interaction process. S5. When motion sickness symptoms are detected, the system will forcibly switch to the vestibular soothing mode, driving the multi-sensory output module to simultaneously output rhythmic white noise, 0.5-2Hz low-frequency wave-like vibration in the backrest area, and soothing fragrance to actively intervene in the child's vestibular system. The entire process forms a closed-loop adaptive control of "perception-decision-execution", requiring no manual operation from the driver or parents.

[0014] The beneficial effects of this invention are as follows: The intelligent child safety seat and control method integrating multi-sensory anti-motion sickness function provided by this invention have the following technical features and advantages in practical use: 1. Completely eliminate image display screens, eradicating visual interference and motion sickness triggers at the source. This invention abandons the existing solution of adding tablets or rear-seat entertainment screens. The seat itself and all interactive interfaces do not have any image display devices such as LCD screens or projectors. This design brings three technological benefits: it completely eliminates the visual and vestibular sensory conflict caused by dynamic images during driving, physically eliminating the most important external trigger for motion sickness in children. Visual-vestibular mismatch is the core mechanism of motion sickness, especially in the high-incidence age group of 2-12 years old; eliminating the screen significantly reduces the incidence of motion sickness; it eliminates the interference of screen light reflection on the driver's attention and the auditory pollution of the cockpit caused by sound leakage, eradicating potential driving safety hazards caused by driver distraction; and it avoids the risk of vision damage to children caused by prolonged close-range eye use. 2. Multi-source heterogeneous perception fusion enables millisecond-level accurate identification of seven major driving scenarios. This invention acquires vehicle speed, acceleration, braking, steering angle, GPS, light, and door lock signals in real time through the CAN bus interface, and combines this with three independent environmental sensors—wiper status, light intensity, and particulate matter concentration—to form a dual-source perception path of "vehicle dynamics + environmental status." The control module has pre-built multi-dimensional cross-validation logic, which can accurately distinguish seven typical driving scenarios: highway cruising, congested crawling, tunnel passage, cornering, parking with pedestrians missing, thunderstorm weather, and sandstorm weather. Compared to existing single-discrimination methods that rely solely on vehicle speed, this invention achieves millisecond-level response to scene switching through multi-dimensional data fusion, effectively avoiding mode mismatch caused by misjudgment from a single sensor. 3. A multi-physiological parameter-based motion sickness precursor prediction and active intervention mechanism enables proactive prevention of motion sickness symptoms. This invention utilizes the seamless collaboration of a flexible fabric sensor and millimeter-wave bio-radar to collect four-dimensional physiological signals in children, including heart rate, respiratory rate, skin conductance, and body movement amplitude. The motion sickness prediction algorithm built into the control module uses a combination of factors—increased heart rate, sudden increase in skin conductance, shallow breathing, and abnormal agitation—as the basis for judgment. When two or more of these factors are met, a precursor warning is triggered. Compared to the passive approach of existing technologies that rely solely on parental observation or playing soothing content at fixed times, this invention significantly advances the intervention time to before motion sickness symptoms appear. Through the simultaneous output of rhythmic white noise, 0.5-2Hz low-frequency wave-like vibration, and soothing aromatherapy via three channels, proactive intervention is completed before vestibular system imbalance occurs, upgrading motion sickness prevention from post-event remediation to pre-event prevention. 4. A multi-sensory output architecture that integrates auditory, tactile, and olfactory modalities to achieve a fusion of entertainment and anti-motion sickness functions. This invention fully integrates ultra-near-field directional speakers, a wide-frequency vibration motor array, a multi-channel fragrance box, and ventilation components into the seat body. The three work together to form a screenless multi-sensory interactive terminal that does not rely on a screen. In different scenarios, the three modalities are dynamically output with different weight combinations: during high-speed cruising, directional audio is used as the main component to build an immersive story experience, supplemented by predictable tactile beats in sync with acceleration and deceleration; during congested crawling, tidal sounds guide abdominal breathing, wave vibrations counteract discomfort during starts and stops, and anti-motion sickness fragrances block nausea reflexes; during thunderstorms, rain sounds and white noise mask sudden thunder, cradle vibrations stabilize emotions, and lavender fragrances reduce sympathetic nerve excitability; during sandstorms, heart-calming music masks the howling sand, pressing vibrations simulate the tactile sensation of an embrace, and fragrances are paused to avoid allergies. This method of dynamically allocating multi-sensory weights according to the scenario upgrades the entertainment system, which was originally only used to soothe children, into an in-vehicle health terminal with both emotional soothing and vestibular intervention functions. 5. Sensors and actuators are fully integrated into the seat, forming a ready-to-use integrated smart terminal that extends off-vehicle monitoring functionality. All sensing and actuator devices in this invention are embedded within the child safety seat itself, requiring no external handheld devices or in-vehicle screens. The seat is fully calibrated at the factory, eliminating the need for additional pairing, attachment, or wiring after installation, significantly lowering the barrier to entry. Furthermore, the integrated design avoids the hazard of external devices becoming projectiles in a collision, meeting passive safety requirements. In addition, in parked-away mode, the system uses a wireless communication module to push real-time data on the child's heart rate, respiratory rate, and in-vehicle temperature to the parent's mobile phone. When abnormal vital signs or persistent, violent crying are detected, a high-level alarm is automatically escalated, extending the seat from a driving safety device to a child safety monitoring terminal in off-vehicle situations, filling the monitoring blind spot when parents temporarily leave the vehicle and the child remains inside. 6. Fully automated adaptive closed-loop control significantly reduces the risk of driver distraction. This invention comprises a complete closed-loop adaptive system, from scene recognition, motion sickness prediction, mode switching, strategy execution to effect monitoring, requiring no manual operation from the driver or parent throughout the process. When a scene change or a change in the child's physiological state is detected, the system automatically completes mode switching and multi-sensory output adjustment within milliseconds, and pushes status notifications to the parent's mobile phone via wireless communication module, greatly reducing secondary distractions caused by manual operation and fundamentally improving driving safety. Attached Figure Description

[0015] Figure 1 This is the main flowchart of the full-scene adaptive control method according to an embodiment of the present invention; Figure 2 This is a schematic diagram of the overall structure of the intelligent child safety seat according to an embodiment of the present invention; Figure 3 This is a diagram of a multi-source sensing architecture according to an embodiment of the present invention; Figure 4 This is a scene recognition architecture diagram according to an embodiment of the present invention; Figure 5 This is a decision execution architecture diagram according to an embodiment of the present invention; Explanation of reference numerals in the attached diagram: 1-Seat body; 2-Physiological sensing module; 21-Flexible fabric sensor; 22-Millimeter-wave bio-radar; 3-Vehicle status acquisition module; 31-CAN bus interface; 4-Control module; 5-Multi-sensory output module; 51-Ultra-near-field directional speaker; 52-Vibration motor array; 53-Multi-channel fragrance box; 54-Ventilation component; 6-Wireless communication module; 7-Soft light ambient light strip; 8-Directional microphone array; 9-Six-axis inertial unit; 10-Central processing unit. Detailed Implementation

[0016] Specific Embodiment 1: To enable those skilled in the art to better understand the technical solution of the present invention, the technical solution of the present invention will be clearly and completely described below in conjunction with embodiments. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention. It should be noted that: In the present invention, unless otherwise specified, all embodiments and preferred methods mentioned herein can be combined to form new technical solutions. In the present invention, unless otherwise specified, all technical features and preferred features mentioned herein can be combined to form new technical solutions. The "scope" disclosed in the present invention can be in the form of a lower limit and an upper limit, and can be one or more lower limits and one or more upper limits, respectively. Unless otherwise stated, the technical and scientific terms used herein have the same meaning as those skilled in the art.

[0017] As per the instruction manual Figure 1 Instruction manual attached Figure 2 As shown, the core of this embodiment lies in an intelligent child safety seat and control method integrating multi-sensory anti-motion sickness function. The seat body 1 is a fully integrated screenless intelligent terminal, with all sensing and execution components embedded within the seat structure, independent of any external handheld device or in-vehicle screen. Specifically, the invention includes: a seat body 1; a physiological sensing module 2, fully integrated within the seat body 1, for non-contact acquisition of the child's physiological signals, including at least heart rate and body movement signals; a vehicle status acquisition module 3, for real-time acquisition of vehicle driving status information via the in-vehicle bus; a multi-sensory output module 5, fully integrated within the seat body 1, for providing composite stimulation including only auditory, tactile, and olfactory senses, without any image display screen on the seat body 1 or the multi-sensory output module 5; and a control module 4, connected to the physiological sensing module 2, the vehicle status acquisition module 3, and the multi-sensory output module 5 respectively. The control module 4 is configured to: identify the current driving scenario based on driving status information, and determine whether the child has signs of motion sickness based on physiological signals; based on the identified driving scenario and the judgment result of signs of motion sickness, automatically switch from multiple preset working modes, and control the multi-sensory output module 5 to execute the auditory-tactile-olfactory composite strategy corresponding to the current mode. When motion sickness symptoms are detected, the control module 4 forcibly switches to the vestibular soothing mode with the highest interrupt priority, driving the multi-sensory output module 5 to simultaneously output rhythmic white noise, 0.5-2Hz low-frequency wave-like vibration in the backrest area, and soothing fragrance. This completes active vestibular intervention before the onset of nausea and vomiting symptoms, thus achieving early prevention of motion sickness symptoms.

[0018] Specifically, as per the instruction manual Figure 2 As shown, the core control unit of the intelligent child safety seat of the present invention is an embedded central processing unit 10, which is located inside the seat base. This central processing unit 10 constitutes the computing core of the control module 4, reading real-time vehicle driving data through the in-vehicle CAN bus interface 31. It is also connected to the physiological sensing module 2, multi-sensory output module 5, wireless communication module 6, soft ambient lighting strip 7, directional microphone array 8, and six-axis inertial unit 9 integrated within the seat, forming a closed-loop system for perception, decision-making, and execution. The entire seat and all interactive interfaces do not have any image display devices such as LCD screens or projectors, physically eliminating visual stimuli that could trigger motion sickness.

[0019] At the physiological perception level, the physiological sensing module 2 is composed of a flexible fabric sensor 21 and a millimeter-wave bio-radar 22 working together. The flexible fabric sensor 21 is woven into the headrest lining, the chest and abdomen padding of the five-point seat belt, and the surface of the seat cushion, allowing it to directly conform to the child's body and acquire body movement amplitude and skin electrical activity. The millimeter-wave bio-radar 22 is embedded in the center of the backrest in a multi-transmitter array, allowing it to penetrate clothing and monitor the child's heart rate and respiratory rate imperceptibly. These devices do not require direct conductive contact with the child's skin during operation, achieving completely imperceptible physiological data acquisition. When the central processing unit 10 analyzes and detects a sudden increase in heart rate exceeding 15% of the baseline value without external stimulation, shallow and rapid breathing, and a significant increase in skin electrical activity, accompanied by an increase in abnormal body twisting amplitude, it is determined to be a pre-motion sickness symptom.

[0020] At the vehicle status perception level, the vehicle status acquisition module 3 directly reads vehicle speed, longitudinal / lateral acceleration, brake pedal status, steering wheel angle, GPS positioning information, and headlight and door lock status from the CAN bus interface 31. Simultaneously, this module also independently receives analog signals from the windshield wiper operating status, external light intensity sensor, and particulate matter concentration sensor. The central processing unit 10 has pre-installed multi-dimensional scene recognition logic: when the vehicle speed is continuously higher than 80km / h and the longitudinal acceleration change rate is less than the threshold, it is "high-speed cruising"; when the vehicle speed is in the range of 0-15km / h and exhibits high-frequency start-stop characteristics, it is "congested crawling"; when the GPS positioning shows that the vehicle has entered a tunnel and the external light intensity drops suddenly, combined with the automatic turn-on of the headlights, it is determined to be "tunnel passage"; when the steering wheel angle is continuously greater than the predetermined angle and the lateral acceleration exceeds the threshold, it is determined to be "driving on a curve"; when the vehicle speed is detected to be zero, the transmission is in P gear, the driver's side door lock is open, and the seat pressure sensor still detects that the child is in place, it is determined to be "parked without a person"; when the windshield wipers are swinging continuously at high speed and the light sensor value drops suddenly, it is determined to be "thunderstorm weather"; when the particulate matter concentration sensor value rises suddenly and the GPS positioning is in a dry and windy geographical area, it is determined to be "sandstorm weather".

[0021] At the output execution level, the multi-sensory output module 5 integrates multiple physical output channels. The auditory channel consists of ultra-near-field directional speakers 51 integrated on both sides of the headrest. The sound waves emitted by these speakers form a private sound bubble that is clearly audible only within 30cm of the child's ear, with minimal auditory interference to the driver and other passengers in the vehicle. The tactile channel consists of a wide-frequency linear vibration motor array 52 distributed in a matrix pattern inside the backrest and seat cushion. Each motor can be independently programmed and controlled, capable of synthesizing rich tactile textures ranging from gentle touches to continuous 0.52Hz wave-like vibrations. The olfactory channel consists of a multi-channel fragrance box 53 linked with a ventilation component 54. The multi-channel fragrance box 53 is pre-filled with certified anti-drowsiness or soothing safe fragrance cores such as ginger, mint, and lavender. The ventilation component 54 can adjust the airflow intensity and internal / external circulation mode according to instructions, directionally delivering fragrance particles to the child's facial area through micropores in the seat cushion and backrest. In addition, a soft ambient light strip 7 is provided on the outer side of the chair back, which is used only for weak ambient lighting in tunnel or nighttime scenes. Its brightness and color temperature are adjustable, but it is never used to display any dynamic images or video content.

[0022] Specific execution in high-speed cruise mode: When the central processor 10 determines that the vehicle is in high-speed cruise mode based on the CAN signal, it immediately triggers the "immersive haptic theater" mode. At this time, directional speakers play preset adventure stories or science audio; simultaneously, the vibration motor array 52 dynamically generates gentle tactile beats at the same frequency as the vehicle speed and acceleration data (for example, the vibration frequency smoothly rises from 1Hz to 1.5Hz during acceleration and decreases synchronously during deceleration), helping the child's vestibular system to anticipate changes in vehicle movement in advance. In this mode, the soft ambient light strip 7 remains off, and the multi-channel fragrance box 53 can selectively activate refreshing fragrances according to the season or parental preferences, but the overall output is primarily auditory, with tactile feedback as a supplement, and any visual dynamic content is strictly prohibited throughout.

[0023] Specific execution under congested crawling mode: When the system detects that the vehicle is in a crawling state with frequent starts and stops, it immediately switches to the "Wave Breathing" anti-motion sickness mode. A directional speaker plays a guiding voice simulating tidal sounds, instructing the child to perform deep abdominal breathing with a 4-7-8 rhythm (inhale for 4 seconds, hold your breath for 7 seconds, exhale for 8 seconds); the vibration motor array 52 is sequentially excited from the back of the seat to the front, generating a slow wave vibration of 0.8-1.2Hz that simulates the feeling of being pushed back by ocean waves, thus counteracting the uncomfortable illusion of forward and backward swaying caused by starting and stopping; simultaneously, the multi-channel fragrance box 53 automatically releases proven ginger or mint-based anti-motion sickness fragrances, and the ventilation component 54 delivers the fragrance airflow to the child's face with a low-speed breeze. If the system continues to detect increased physical movement in the child, it will automatically increase the volume of the voice interaction and amplify the amplitude of the wave vibrations to divert attention.

[0024] Specific execution in tunnel passage mode: When GPS positioning shows a distance of 200 meters from the tunnel entrance and the external light sensor readings begin to decrease, the system initiates a transition strategy in advance. The soft ambient lighting strip 7 gradually switches to an extremely weak warm yellow light (illuminance below 5 lux) to avoid startle reflexes caused by sudden darkness; the directional speakers seamlessly switch to low-frequency, soothing soft music, superimposed with a calming voiceover saying "Entering the Magic Forest Tunnel"; the vibration motor array 52 on both sides of the backrest outputs gentle pulses alternately from left to right, simulating the tactile sensation of branches brushing against the vehicle body. When exiting the tunnel, the system gradually returns to the state before entry in reverse order, ensuring that the sudden change in environment is smoothly resolved.

[0025] The specific execution of the cornering driving mode is as follows: When the central processing unit 10 determines that the vehicle is in a cornering state based on the steering wheel angle signal continuously exceeding a predetermined angle and the lateral acceleration exceeding a threshold, the system activates the cornering assistance and soothing strategy: directional speakers play rhythmic white noise (frequency concentrated between 200-1000Hz, volume stable at 45dB) to maintain the continuity and stability of the auditory environment and avoid additional vestibular interference caused by changes in music melody; the vibration motor array 52 outputs a progressive side vibration cues opposite to the direction of the vehicle's centrifugal force based on the real-time lateral acceleration direction and magnitude. When the vehicle turns right, the left side vibration unit of the backrest is excited first, with the vibration amplitude gradually increasing, and then the right side unit responds in the same mode, forming a progressive side vibration wave from the opposite side of the turning direction to the same side, allowing the child's vestibular system to anticipate the changing trend of lateral acceleration through somatosensory perception; at the same time, the multi-channel fragrance box 53 releases a low concentration of mint-scented fragrance (concentration of 50% of the normal release amount), which is delivered to the child's face through a micro-airflow via the ventilation component 54 to maintain a moderate level of alertness without causing stimulation. In this mode, the soft ambient light strip 7 maintains the current lighting status without introducing any additional visual changes.

[0026] The specific execution of the "Away From Home" monitoring mode is as follows: When the central processing unit 10 detects that the vehicle speed is zero, the car is in Park (P) gear, the driver's side door is open, and the seat pressure sensor still indicates that the child is in place, the system immediately activates the "Away From Home" monitoring mode. A directional speaker plays a pre-recorded reassuring message from the parent (such as "Don't be afraid, baby, Mommy will be right back") at a low volume in a loop; the vibration motor array 52 provides continuous low-frequency soothing touches (approximately 0.5Hz). Simultaneously, the wireless communication module 6 pushes the child's current heart rate, respiratory rate, and in-car temperature data to the parent's mobile app in real time via built-in 5G communication. If the heart rate exceeds 180 beats / min, the respiratory rate falls below 10 breaths / min, or the in-car temperature exceeds 35°C, the system automatically escalates the push to a high-frequency emergency alarm and dials the preset emergency contact number, maximizing the coverage of blind spots in off-vehicle monitoring.

[0027] Motion Sickness Precursor Active Intervention Mode (Highest Priority): In any driving mode, if the central processing unit 10 detects two or more of the following four indicators—sudden increase in heart rate, sudden increase in skin conductance, shallow breathing, and abnormal agitation—it determines that motion sickness precursor has occurred. At this time, the system forcibly pauses the current entertainment content or voice interaction with the highest interrupt priority and seamlessly switches to the "Vestibular Soothing Mode." In this mode, directional speakers emit rhythmic pink noise (frequency mainly distributed at 50500Hz, volume stable at 4050dB); the vibration motor array 52 precisely generates a low-frequency wave-like vibration of 0.52Hz, and the vibration wave is transmitted from the seat cushion to the backrest from bottom to top, simulating the soothing rocking of a cradle; at the same time, the multi-channel fragrance box 53 releases a compound fragrance of peppermint and lavender, and the ventilation component 54 delivers it to the area around the child's nasal cavity with a gentle airflow. The three functions output synchronously and continuously for at least 3 minutes until the physiological indicators return to baseline levels, thereby completing active vestibular intervention before the onset of obvious symptoms such as nausea and vomiting, and achieving early prevention of motion sickness symptoms.

[0028] Specific execution in thunderstorm weather scenarios: When the system identifies thunderstorm weather based on continuous high-speed operation of the windshield wipers, a sudden drop in external light, and rainfall signals on the CAN bus, it automatically switches to "sleep cabin" mode. A directional speaker plays low-frequency rain-sound white noise with dynamic masking to mask the sharp sounds of sudden thunder; the vibration motor array 52 outputs continuous, gentle cradle-like vibrations at 0.8-1.5Hz, simulating the sensation of being rocked to sleep while walking; the soft ambient light strip 7 is adjusted to its darkest warm yellow (below 2 lux) to avoid the sudden changes in light and dark caused by lightning; simultaneously, the multi-channel fragrance box 53 releases certified lavender or chamomile-based soothing fragrances, which are blown towards the child's face at a very low speed through the ventilation component 54. If the millimeter-wave bio-radar 22 detects a panic reaction with a sharp increase in heart rate, the system temporarily increases the low-frequency vibration amplitude by 20% and superimposes a 3-second "mom gently humming" audio clip until the child's heart rate returns to stable.

[0029] Specific implementation in sandstorm weather scenarios: When the system detects a sudden increase in the external particulate matter concentration sensor reading (PM2.5 > 150 μg / m³), 3When the windshield wipers are in low-speed intermittent mode and the GPS location indicates a dry and windy area, the system identifies it as sandstorm weather. To prioritize children's respiratory health, the central processing unit 10 first issues an instruction to close the external air intake of the ventilation component 54, switch to full internal air circulation mode, and pause all fragrance release from the multi-channel fragrance box 53 (to avoid fragrance particles mixing with sand and dust, causing allergies or respiratory irritation). At the same time, to mask the continuous low-frequency noise of the howling sand outside the vehicle, the directional speakers moderately increase the volume to 55dB, playing steady-beat music with a clear rhythm or repetitive nursery rhymes; the vibration motor array 52 outputs deep and slow pressing vibrations (frequency about 1Hz, large amplitude), simulating the tactile sense of security of being hugged and patted on the back. If visibility is low due to sandstorms and the vehicle brakes frequently, the system will simultaneously activate braking prediction assistance—0.5 seconds before each braking event, a brief pre-vibration prompt is output through the backrest vibration motor array 52 to help the child's vestibular system anticipate longitudinal deceleration. In this scenario, the wireless communication module 6 will also proactively send a friendly reminder to the parent's mobile phone: "There is a lot of sand and dust outside; the internal circulation has been automatically switched and the fragrance has been paused." The above describes and illustrates the basic principles, main features, and advantages of this invention. Those skilled in the art should understand that this invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this invention. Various changes and modifications can be made to this invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the invention as claimed.

Claims

1. A smart child safety seat integrating multi-sensory anti-motion sickness function, characterized in that, include: Seat body (1); Physiological sensing module (2), fully integrated into the seat body (1), for non-contact collection of children's physiological signals, the physiological signals including at least heart rate and body movement signals; The vehicle status acquisition module (3) is used to acquire the vehicle's driving status information in real time through the in-vehicle bus; the multi-sensory output module (5) is fully integrated into the seat body (1) and is used to provide composite stimulation containing only hearing, touch and smell, and the seat body (1) and the multi-sensory output module (5) are not equipped with any image display screen; the control module (4) is connected to the physiological sensing module (2), the vehicle status acquisition module (3) and the multi-sensory output module (5) respectively. The control module (4) is configured to: identify the current driving scenario based on driving status information, and determine whether the child is showing signs of motion sickness based on physiological signals; Based on the identified driving scenario and motion sickness warning results, it automatically switches between multiple preset working modes and controls the multi-sensory output module (5) to execute the auditory-touch-olfactory composite strategy corresponding to the current mode. When motion sickness precursors are detected, the control module (4) forcibly switches to the vestibular soothing mode with the highest interrupt priority, and drives the multi-sensory output module (5) to output rhythmic white noise, 0.5-2Hz low-frequency wave vibration of the backrest area and soothing fragrance simultaneously, so as to complete active vestibular intervention before the onset of nausea and vomiting symptoms and achieve the prevention of motion sickness precursor symptoms in advance. The physiological sensing module (2) includes a flexible fabric sensor (21) embedded in the headrest, chest and abdomen padding of the five-point seat belt and the surface of the seat cushion, and a millimeter-wave bio-radar (22) embedded in the center of the backrest; the flexible fabric sensor (21) is used to collect the child's body movement amplitude and skin conductance, and the millimeter-wave bio-radar (22) is used to monitor the heart rate and respiratory rate in a non-contact manner. The two work together to achieve completely imperceptible four-dimensional physiological signal collection.

2. The intelligent child safety seat with integrated multi-sensory anti-motion sickness function according to claim 1, characterized in that, The criteria for judging motion sickness precursors are as follows: when the control module (4) analyzes that the heart rate suddenly increases beyond the baseline value without external stimulation, breathing becomes shallow and rapid, skin conductance level increases significantly and body twisting amplitude increases, and any two or more of the above four indicators are met, it is judged as motion sickness precursors.

3. The intelligent child safety seat with integrated multi-sensory anti-motion sickness function according to claim 2, characterized in that, The vehicle status acquisition module (3) acquires vehicle speed, steering angle, longitudinal / lateral acceleration, braking signal, GPS positioning information, light status and door lock status in real time through the in-vehicle CAN bus interface (31). At the same time, the vehicle status acquisition module (3) also independently connects to three types of environmental signals: windshield wiper working status, external light intensity sensor and particulate matter concentration sensor. The vehicle status acquisition module (3) has built-in multi-dimensional cross-validation scene recognition logic to accurately distinguish the following seven driving scenarios: high-speed cruising, congested crawling, tunnel passage, curve driving, parking with people away, thunderstorm weather and sandstorm weather.

4. The intelligent child safety seat with integrated multi-sensory anti-motion sickness function according to claim 1, characterized in that, The multi-sensory output module (5) is integrated into the seat body (1) by physical output channels; the physical output channels are the auditory channel, the tactile channel and the olfactory channel.

5. A smart child safety seat integrating multi-sensory anti-motion sickness function according to claim 4, characterized in that, The auditory channel is an ultra-near-field directional speaker (51) integrated on both sides of the headrest, whose sound waves form a private sound bubble that can be clearly heard only near the child's ears; the tactile channel is a wide-frequency linear vibration motor array (52) distributed inside the backrest and seat cushion, each motor can be independently programmed, and can synthesize a rich tactile texture from gentle touch to continuous wave-like vibration, wherein the anti-dizziness core frequency range is 0.5-2Hz; the olfactory channel is composed of a multi-channel fragrance box (53) and a ventilation component (54) linked together, the fragrance box is pre-filled with an anti-dizziness or soothing fragrance core, and the ventilation component (54) adjusts the airflow intensity and internal and external circulation mode according to the instructions to deliver fragrance particles to the child's face.

6. A smart child safety seat integrating multi-sensory anti-motion sickness function according to claim 5, characterized in that, The precise correspondence between the preset driving scenarios and multi-sensory composite strategies in the control module (4) includes: in high-speed cruise mode, all visual dynamic content is disabled, and only the directional speaker is controlled to play immersive story audio. At the same time, the vibration motor array (52) is controlled to dynamically generate predictable gentle tactile beats that are in sync with the vehicle's acceleration and deceleration based on the real-time vehicle speed and acceleration, helping the child's vestibular system to establish motor expectations; in congested crawl mode, the directional speaker is controlled to start a voice interactive game and guide deep abdominal breathing. The vibration motor array (52) generates a slow wave vibration of 0.8-1.2Hz transmitted from the back of the seat to the front to counteract the discomfort of starting and stopping. The multi-channel fragrance box (53) releases anti-dizziness fragrance, and the ventilation component (54) assists in delivery with low-speed airflow.

7. A smart child safety seat integrating multi-sensory anti-motion sickness function according to claim 6, characterized in that, In tunnel driving mode, the ambient light strip (7) is pre-adjusted to a very weak warm light based on GPS and light signals. The directional speaker switches to low-frequency soothing music and superimposed with a calming voice narration. The vibration units on both sides of the backrest alternately vibrate to simulate the feeling of branches and leaves brushing past, smoothly transforming sudden environmental changes into a game experience. In curve driving mode, the directional speaker plays rhythmic white noise to maintain the stability of the auditory environment. The vibration motor array (52) outputs a progressive side vibration prompt that is opposite to the direction of the vehicle's centrifugal force, helping the child's vestibular system to predict changes in lateral acceleration. At the same time, it releases a low-concentration mint fragrance to maintain alertness. In parking and leaving mode, the directional speaker is controlled to play the parent's pre-recorded calming voice in a loop. The vibration motor array (52) provides low-frequency soothing touches. At the same time, the wireless communication module (6) pushes the child's real-time heart rate, respiratory rate and in-vehicle temperature data to the parent's mobile phone. When abnormal vital signs or high temperature are detected, it automatically upgrades to an emergency alarm.

8. A smart child safety seat integrating multi-sensory anti-motion sickness function according to claim 7, characterized in that, In thunderstorm weather mode, the directional speaker plays low-frequency rain white noise with dynamic masking to cover up the thunder outside. The vibration motor array (52) outputs 0.8-1.5Hz continuous cradle vibration. The soft light ambient light strip (7) is adjusted to the darkest warm yellow. The multi-channel fragrance box (53) releases lavender-like soothing fragrance. If a sudden increase in heart rate is detected, the vibration amplitude is temporarily increased and a mother's voice is superimposed to soothe the heart. In sandstorm weather mode, the control module (4) first closes the external circulation air inlet of the ventilation component (54) and pauses the fragrance release to protect the respiratory tract. The directional speaker increases the volume to play calming rhythm music or repetitive nursery rhymes to cover up the howling sandstorm. The vibration motor array (52) outputs a pressing hugging tactile sensation. At the same time, it issues a pre-vibration prompt in advance to assist the vestibular prediction when frequent braking occurs.

9. A smart child safety seat integrating multi-sensory anti-motion sickness function according to claim 8, characterized in that, The control module (4) is also connected to a directional microphone array (8) and a six-axis inertial unit (9) inside the seat. The directional microphone array (8) is used to pick up the child's voice and identify the voiceprint emotion characteristics. The six-axis inertial unit (9) is used to detect the changes in the angular velocity and acceleration of the seat body (1) in real time, and then calculate the displacement amplitude of the child's body. The above information serves as a redundant basis for assisting in judging the child's state and mode switching, thereby improving the robustness of the system decision.

10. A control method for an intelligent child safety seat integrating multi-sensory anti-motion sickness function as described in any one of claims 1 to 9, characterized in that, Includes the following steps: S1. Physiological signals of the child, including at least heart rate and body movement signals, are collected without contact through the physiological sensing module (2) that is fully integrated into the seat body (1). S2. The vehicle driving status information is obtained in real time through the vehicle status acquisition module (3) via the CAN bus interface (31), and the three types of environmental signals, namely wiper, light and particulate matter concentration, are read synchronously. S3, the control module (4) identifies the current driving scene by fusing driving status information and environmental signals, and at the same time judges whether the child has signs of motion sickness based on physiological signals; S4. The control module (4) automatically switches from multiple preset working modes based on the current driving scenario and the judgment result of motion sickness precursors, and controls the multi-sensory output module (5) integrated in the seat to execute the corresponding auditory-touch-olfactory composite strategy. No image display screen is enabled during the entire interaction process. S5. When motion sickness symptoms are detected, the system is forcibly switched to the vestibular soothing mode, and the multi-sensory output module (5) is driven to output rhythmic white noise, 0.5-2Hz low-frequency wave vibration in the backrest area and soothing fragrance to actively intervene in the child's vestibular system. The entire process forms a closed-loop adaptive control of "perception-decision-execution", and no manual operation is required from the driver or parents.

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