Carsickness protection system and intelligent seat

Abstract

The invention relates to a carsickness protection system and an intelligent seat. The system comprises a physiological monitoring module, a thermal environment management module and an intelligent decision module, the thermal environment management module comprises a plurality of fans embedded in a seat cushion, a thermosensitive heating pad laid on the surface of a seat and a porous sleeve structure integrated in a safety belt. Wherein the physiological monitoring module is used for monitoring physiological data of passengers in real time; the intelligent decision-making module is used for judging the motion sickness level of the passenger according to the physiological data and generating a corresponding control instruction according to the motion sickness level; the control instruction comprises a steering mode and a rotating speed grade of the fan, a power gear of the thermosensitive heating pad and a set temperature of the porous sleeve structure; and the thermal environment management module is used for controlling the fan, the thermosensitive heating pad and the porous sleeve structure to operate according to the control instruction. According to the scheme, the carsickness state of the passenger can be monitored, meanwhile, the temperature of the automobile seat is adjusted and controlled according to the carsickness state of the passenger, the carsickness state is relieved, and the riding experience of the passenger is improved.

Description

Technical Field

[0001] The present application relates to the field of vehicle technology, and in particular to a motion sickness protection system and a smart seat. Background Art

[0002] With the continuous development of the automotive industry, people's demand for car seat comfort is increasing. Traditional ventilated seats typically use built-in fans and ventilation systems to provide ventilation in the back cover area, circulating air to the seat back to help maintain passenger comfort. When combined with seat heating, these seats can cool or warm passengers in hot or cold weather and during long rides, providing a more comfortable riding experience.

[0003] Motion sickness is a common problem during transportation, seriously affecting passenger comfort and the overall ride experience. Related technologies employ sensors and motion sickness detection integrated modules installed on seat covers to capture the passenger's physical characteristics. Based on this information, a motion sickness model is constructed to categorize the passenger's motion sickness. However, remedies for motion sickness primarily rely on medications and patches, which require prior preparation, are time-consuming, and have limited effectiveness.

[0004] In summary, there has not yet been a technical solution in the relevant technology that can simultaneously take into account the temperature control of the car seat and the monitoring of the passenger's motion sickness status and effectively alleviate the motion sickness condition. Summary of the Invention

[0005] In order to solve or partially solve the problems existing in the related art, the present application provides a motion sickness protection system and a smart seat, which can monitor the motion sickness status of the passenger while adjusting the temperature of the car seat according to the passenger's motion sickness status, thereby alleviating the motion sickness and improving the passenger's riding experience.

[0006] In a first aspect, the present application provides a motion sickness protection system, the system comprising a physiological monitoring module, a thermal environment management module, and an intelligent decision-making module; the thermal environment management module comprises: multiple fans embedded in the seat cushion, a thermosensitive heating pad laid on the seat surface, and a porous sleeve structure integrated into the seat belt; wherein: The physiological monitoring module is used to monitor the physiological data of the occupant in real time; The intelligent decision-making module is used to determine the occupant's motion sickness level based on the physiological data and generate corresponding control instructions based on the motion sickness level; the control instructions include a steering mode and a speed level of the fan, a power level of the thermal heating pad, and a set temperature of the porous sleeve structure; The thermal environment management module is used to control the fan, the thermosensitive heating pad and the porous sleeve structure to operate according to the control instructions.

[0007] In one embodiment, the physiological data includes heart rate data, low-frequency power density values ​​and high-frequency power density values, respiratory rate, and chest micro-vibration amplitude; the physiological monitoring module includes a flexible piezoelectric film sensor disposed in the ischial region of the seat cushion and a multi-channel pressure sensor array disposed in the thoracic region of the backrest; The flexible piezoelectric film sensor is used to collect the passenger's heart rate data in real time and calculate the low-frequency power density value and the high-frequency power density value; The multi-channel pressure sensor array is used to monitor the breathing frequency and chest micro-vibration amplitude of the occupant.

[0008] In one embodiment, the intelligent decision-making module includes a processor and a memory, wherein the memory stores a motion sickness grading model and a dynamic thermal comfort map; The processor is used to determine the occupant's motion sickness level based on the motion sickness grading model and the heart rate data, the low-frequency power density value, the high-frequency power density value, and the breathing rate; query the dynamic thermal comfort map according to the motion sickness level, and generate a control instruction corresponding to the motion sickness level.

[0009] In one embodiment, the system further comprises a timing module; The timing module is used to start recording time when the flexible piezoelectric film sensor and the multi-channel pressure sensor array generate the physiological data; The multi-channel pressure sensor array is further used to generate a pressure range; The processor is further configured to obtain the pressure range and the corresponding duration, and generate a sitting posture misalignment signal if the pressure range is smaller than a pressure threshold and the duration is greater than a time threshold.

[0010] In one embodiment, the memory further stores a standard sitting posture diagram; The processor is also used to, after generating a sitting posture misalignment signal, determine a difference interval based on the standard sitting posture diagram and the pressure range if the heart rate data is within a preset range, and control the fan to adjust the wind speed so that the fan acts on the occupant's buttocks position within the difference interval.

[0011] In one embodiment, the system further comprises a user interaction module, wherein the user interaction module comprises a speech recognition unit and a mobile terminal communication interface; The voice recognition unit is configured to respond to the occupant's voice command and override the control command generated by the intelligent decision module; The mobile terminal communication interface is used to upload motion sickness historical data and receive optimized control parameters to optimize the motion sickness grading model.

[0012] In one embodiment, the system further includes a temperature detection module, which is used to detect the ambient temperature inside and outside the vehicle; the porous sleeve structure is connected to the vehicle air conditioning system through a flexible channel, and the flexible channel is provided with a switch; The intelligent decision-making module is also used to turn on the switch if the temperature outside the vehicle is higher than a preset threshold; and turn off the switch if the difference between the temperature inside the vehicle and the temperature set by the vehicle air conditioner is within a preset range.

[0013] In one embodiment, the thickness of the flexible piezoelectric film sensor is less than or equal to 5 mm, the surface of the flexible piezoelectric film sensor is covered with a breathable and non-slip fabric layer, and is connected to the analog signal input port of the intelligent decision-making module through a shielded wire.

[0014] In one embodiment, the multi-channel pressure sensor array is composed of at least three rectangular sensing units arranged in a triangle, the length of the sensing unit is greater than or equal to 5 cm, the width is greater than or equal to 2 cm, and the distance between adjacent sensing units is less than or equal to 3 cm.

[0015] A second aspect of the present application provides a smart seat comprising the motion sickness protection system as described in any one of the above items.

[0016] The technical solution provided by this application may include the following beneficial results: it can monitor the motion sickness state of passengers while adjusting the temperature of car seats according to the motion sickness state of passengers, alleviate motion sickness, and improve the passenger's riding experience.

[0017] The technical solution of this application, through the provision of flexible piezoelectric film sensors and a multi-channel pressure sensor array, achieves comprehensive real-time monitoring of physiological information such as the occupant's heart rate variability spectrum, respiratory rate, and chest micro-vibration amplitude, overcoming the shortcomings of existing seat systems in their ability to monitor occupant physiological information. The flexible piezoelectric film sensors, less than 5 mm thick and covered with a breathable, non-slip fabric layer, improve measurement accuracy and comfort, addressing the poor comfort of traditional sensors. The multi-channel pressure sensor array, consisting of at least three rectangular sensing units arranged in a triangle, achieves comprehensive pressure distribution monitoring of the occupant's chest, improving both comprehensiveness and accuracy of the measurement. Based on the motion sickness grading model, the real-time calculation of low-frequency power density values ​​and high-frequency power density values ​​can accurately identify the occupant's motion sickness level, overcoming the subjectivity and limitations of traditional manual judgment of motion sickness; by switching between the forward air supply mode and the reverse air suction mode of the brushless DC fan, and adopting the pulse oscillation working mode, precise adjustment of the seat thermal environment is achieved, meeting the thermal comfort needs of occupants in different motion sickness states; through the setting of the intelligent decision-making unit, the PTC heating pad can be forcibly disabled when the motion sickness level reaches level two or above, and through the connection with the vehicle air-conditioning system through the porous sleeve structure, all-round comfort management of the occupants is achieved, effectively alleviating motion sickness symptoms.

[0018] The technical solution of the present application determines the seat's pressure range using pressure signals generated by a multi-channel pressure sensor array. Specifically, when a person sits on the seat, pressure is transmitted to the multi-channel pressure sensor array, generating an electrical signal. By collecting the locations of the signal generation, the pressure location can be determined, thereby mapping the passenger's approximate sitting position. Generally speaking, the pressure areas that can be identified in a normal sitting posture are the buttocks and thighs. If the pressure signal feedback from the pressure sensor is missing from a certain area (for example, when the legs are crossed), the pressure range is determined to be less than a pressure threshold. (Specifically, the area ratio of the buttocks and legs can be determined based on the position contour information of the pressure sensor signal returned in the normal sitting posture, and a numerical range of the ratio can be set to determine whether the legs are in contact with the seat cushion. Alternatively, the pressure contour can be analyzed. If the contour of the buttocks or one leg is missing, the pressure range is determined to be less than the pressure threshold.) If the duration of the action exceeds the time threshold, that is, the action is maintained for a long time, if the passenger is asleep or in a state of motion sickness, maintaining a posture similar to crossing the legs for a long time can easily cause leg soreness and affect blood supply, making the motion sickness more and more severe. Therefore, when an improper sitting posture is detected, a reminder can be issued.

[0019] The technical solution of the present application can perform interactive operations according to the voice commands of the passengers, and at the same time realize the uploading of motion sickness historical data and the reception of optimization parameters, thereby improving the intelligence level and practicality of the system and meeting the needs of efficient and non-invasive health management.

[0020] The technical solution of this application can intelligently shut down the ventilation of the porous sleeve, opening it when passengers need to be cooled quickly and closing it when not. This can maximize the cooling efficiency and actively shut down the switch when the ambient temperature drops to prevent passengers from experiencing discomfort.

[0021] It should be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The above and other objects, features and advantages of the present application will become more apparent by describing in more detail exemplary embodiments of the present application in conjunction with the accompanying drawings, wherein the same reference numerals generally represent the same components in the exemplary embodiments of the present application.

[0023] Figure 1 is a structural diagram of a motion sickness protection system shown in an embodiment of the present application; Figure 2 is a flow chart of a motion sickness protection method according to an embodiment of the present application; Figure 3 It is a structural diagram of the smart seat shown in an embodiment of the present application. DETAILED DESCRIPTION

[0024] The following describes embodiments of the present application in more detail with reference to the accompanying drawings. Although the accompanying drawings illustrate embodiments of the present application, it should be understood that the present application can be implemented in various forms and should not be limited by the embodiments described herein. Rather, these embodiments are provided to make the present application more thorough and complete, and to fully convey the scope of the present application to those skilled in the art.

[0025] The terms used in this application are for the purpose of describing specific embodiments only and are not intended to limit this application. As used in this application and the appended claims, the singular forms "a," "an," "the," and "the" are intended to include the plural forms, unless the context clearly indicates otherwise. It should also be understood that the term "and / or" as used herein refers to and encompasses any and all possible combinations of one or more of the associated listed items.

[0026] It should be understood that although the terms "first", "second", "third", etc. may be used in this application to describe various information, this information should not be limited to these terms. These terms are only used to distinguish information of the same type from each other. For example, without departing from the scope of this application, the first information may also be referred to as the second information, and similarly, the second information may also be referred to as the first information. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0027] There has not yet been a technical solution in the relevant technology that can simultaneously take into account the temperature control of the car seat and the monitoring of the passenger's motion sickness status and effectively alleviate the motion sickness condition.

[0028] In response to the above problems, the embodiments of the present application provide a motion sickness protection system and a smart seat, which can monitor the passenger's motion sickness state while adjusting the temperature of the car seat according to the passenger's motion sickness state, thereby alleviating the motion sickness and improving the passenger's riding experience.

[0029] The technical solutions of the embodiments of the present application are described in detail below with reference to the accompanying drawings.

[0030] Figure 1 Schematic diagram of the structure of the motion sickness protection system shown in an embodiment of the present application.

[0031] See also Figure 1 The motion sickness protection system 100 includes a physiological monitoring module 110, a thermal environment management module 120, and an intelligent decision-making module 130. The thermal environment management module 120 includes: multiple fans 121 embedded in the seat cushion, a thermosensitive heating pad 122 laid on the seat surface, and a porous sleeve structure 123 integrated into the seat belt; wherein: The physiological monitoring module 110 is used to monitor the physiological data of the occupant in real time; The intelligent decision module 130 is used to determine the occupant's motion sickness level based on physiological data and generate corresponding control instructions based on the motion sickness level; the control instructions include the steering mode and speed level of the fan 121, the power level of the thermal heating pad 122, and the set temperature of the porous sleeve structure 123; The thermal environment management module 120 is used to control the fan 121, the thermosensitive heating pad 122 and the porous sleeve structure 123 to operate according to the control instructions.

[0032] In order to monitor the motion sickness of passengers in real time, alleviate the motion sickness of passengers, and improve the passenger riding experience, an embodiment of the present application provides a motion sickness protection system 100, which includes a physiological monitoring module 110, a thermal environment management module 120, and an intelligent decision-making module 130.

[0033] The physiological monitoring module 110 can monitor the physiological data of the occupant in real time and send the physiological data to the intelligent decision-making module 130 .

[0034] The intelligent decision-making module 130 can determine the occupant's motion sickness level based on the physiological data sent by the physiological monitoring module 110, generate corresponding control instructions based on the motion sickness level, and send the control instructions to the thermal environment management module 120.

[0035] The thermal environment management module 120 includes multiple fans 121 embedded in the seat cushion, a thermosensitive heating pad 122 laid on the seat surface, and a porous sleeve structure 123 integrated into the seat belt. The control instructions include the steering mode and speed level of the fans 121, the power level of the thermosensitive heating pad 122, and the set temperature of the porous sleeve structure 123. In one example, the number of fans 121 can be set to four, respectively, located on the front and rear sides of the seat cushion. Four independent brushless motors are used to control the fans 121. The fans 121 are powered by a 12V DC voltage, have a rated power of 5W, and a maximum air volume of 0.3 cubic meters per minute. The fans 121 have a forward air supply mode and a reverse air suction mode. The maximum air volume in the reverse air suction mode is 1.5 times that of the forward air supply mode, reaching 0.45 cubic meters per minute. The fan in the seat cushion area supports a pulse oscillation working mode, which is defined as the fan 121 operating in a cycle of 3 seconds on and 1 second off. This working mode can effectively reduce the occupants' adaptability to airflow and improve the thermal comfort perception effect.

[0036] The thermal heating pad 122 is made of a PTC (Positive Temperature Coefficient) material, whose resistance increases with increasing temperature. Applied to the seat surface, the thermal heating pad 122 can consist of one or more pads, enabling temperature adjustments to be applied to different areas of the backrest. This solution employs unified regulation, maintaining the same backrest temperature. The various temperatures on the dynamic thermal comfort map correspond to the various settings of the thermal heating pad 122. The temperature on the dynamic thermal comfort map is the temperature that best alleviates motion sickness symptoms. The thermal heating pad 122 is constructed from a composite of carbon fiber heating wire and polyamide material, with a thickness of 2 mm. It has a power density of 500 W / m², a maximum surface temperature limit of below 45°C, and three power adjustment levels. If the intelligent decision-making module 130 determines that the occupant's motion sickness level reaches level 2 or above, the thermal heating pad 122 is forcibly disabled and remains disabled until the motion sickness level drops below level 1. This design effectively prevents motion sickness from being exacerbated by thermal discomfort.

[0037] The porous sleeve structure 123 inside the seat belt is made of aluminum alloy, with a wall thickness of 0.8 mm, an inner diameter of 12 mm, a pore diameter of 0.5 mm, and a pore density of 25 per square centimeter, evenly distributed in the seat belt area near the occupant's neck and chest. The inner wall of the porous sleeve is coated with a thermally conductive silicone layer with a thickness of 0.3 mm and a thermal conductivity coefficient of 1.5 W / (m·K). The porous sleeve structure 123 is connected to the vehicle's air conditioning system through a flexible air duct with a diameter of 15 mm. The flexible air duct is made of polyurethane, has a smooth inner wall, and a flow resistance coefficient of less than 0.05. The seat belt air supply temperature setting range is 3 to 5 degrees Celsius lower than the vehicle's air conditioning setting temperature, and is precisely controlled by an independent temperature sensor and electronically controlled valve.

[0038] The motion sickness protection system provided in the embodiment of the present application can monitor the motion sickness state of the passenger while adjusting the temperature of the car seat according to the passenger's motion sickness state, thereby alleviating the motion sickness condition and improving the passenger's riding experience.

[0039] In an optional embodiment of the present application, the physiological data includes heart rate data, low-frequency power density values ​​and high-frequency power density values, respiratory rate, and chest micro-vibration amplitude; the physiological monitoring module 110 includes a flexible piezoelectric film sensor 111 disposed in the ischial region of the seat cushion and a multi-channel pressure sensor array 112 disposed in the thoracic vertebra region of the backrest; The flexible piezoelectric film sensor 111 is used to collect the occupant's heart rate data in real time and calculate the low-frequency power density value and the high-frequency power density value; The multi-channel pressure sensor array 112 is used to monitor the occupant's breathing rate and chest micro-vibration amplitude.

[0040] Physiological data includes heart rate, low-frequency power density (LF) and high-frequency power density (HF), respiratory rate, and chest micro-vibration amplitude. The physiological monitoring module 110 includes a flexible piezoelectric film sensor 111 located in the ischial region of the seat cushion and a multi-channel pressure sensor array 112 located in the thoracic spine region of the backrest.

[0041] In an optional embodiment of the present application, the thickness of the flexible piezoelectric film sensor 111 is less than or equal to 5 mm, the surface of the flexible piezoelectric film sensor 111 is covered with a breathable and non-slip fabric layer, and is connected to the analog signal input port of the intelligent decision-making module 130 through a shielded wire.

[0042] The flexible piezoelectric film sensor 111 is made of polyvinylidene fluoride (PVDF) material with a thickness of less than or equal to 5 mm, for example, 3 mm. The surface is covered with a breathable and non-slip fabric layer. The fabric layer is made of a blend of polyester fiber and polyurethane fiber, and has good air permeability and non-slip properties. The flexible piezoelectric film sensor 111 is connected to the analog signal input port of the intelligent decision-making module 130 through a double-layer shielded wire. The shielded wire adopts a copper core cable with an aluminum foil shielding layer and a braided shielding layer structure to effectively suppress external electromagnetic interference. The flexible piezoelectric film sensor 111 is configured to collect the heart rate data of the occupant in real time, such as the heart rate variability spectrum signal, with a sampling frequency of 200 Hz, and calculate the low-frequency power density value (0.04-0.15 Hz frequency band) and the high-frequency power density value (0.15-0.4 Hz frequency band) through the fast Fourier transform algorithm.

[0043] In an optional embodiment of the present application, the multi-channel pressure sensor array 112 is composed of at least three rectangular sensing units arranged in a triangle, the length of the sensing unit is greater than or equal to 5 cm, the width is greater than or equal to 2 cm, and the distance between adjacent sensing units is less than or equal to 3 cm.

[0044] Multi-channel pressure sensor array 112 consists of three rectangular sensing units arranged in a triangular pattern. Each sensing unit is 5 cm or longer, 2 cm or wider, and 3 cm or shorter between adjacent sensing units. In one example, each sensing unit is 6 cm long, 2.5 cm wide, and 2.5 cm apart. Each sensing unit incorporates 16 miniature piezoresistive sensor elements with a sensitivity of 0.5 mV / kPa and a range of 0-10 kPa. Multi-channel pressure sensor array 112 is configured to monitor the occupant's respiratory rate and chest micro-vibration amplitude. By detecting periodic pressure changes in the chest region, it accurately measures respiratory rate with a resolution of ±1 breath / minute.

[0045] In an optional embodiment of the present application, the intelligent decision module 130 includes a processor 131 and a memory 132 , and the memory 132 stores a motion sickness grading model and a dynamic thermal comfort map; The processor 131 is used to determine the occupant's motion sickness level based on the motion sickness grading model and heart rate data, low-frequency power density value, high-frequency power density value, and breathing rate; query the dynamic thermal comfort map according to the motion sickness level, and generate control instructions corresponding to the motion sickness level.

[0046] Intelligent decision-making module 130 includes a processor 131 and memory 132. Processor 131 uses a quad-core processor with a main frequency of 1.5 GHz, equipped with 4GB of LPDDR4 memory and 64GB of eMMC storage. Memory 132 stores a motion sickness grading model and a dynamic thermal comfort map. The motion sickness grading model establishes a four-level motion sickness assessment system based on physiological data: Level 0 (normal state), Level 1, Level 2, and Level 3. Levels 0 and 1 are collectively referred to as Level 1 motion sickness, Level 2 as Level 2, and Level 3 as Level 3. Table 1 below shows the triggering conditions for each level of motion sickness. Level 2 motion sickness is triggered when at least three of the following four conditions are met simultaneously: a sustained increase of more than 10% in the heart rate range of 60 to 100 beats per minute, a sustained increase in the respiratory rate range of 16 to 20 beats per minute, a sustained increase in the low-frequency power density range of 40 to 80 standard units, and a sustained decrease in the high-frequency power density range of 10 to 50 standard units.

[0047] Table 1 Trigger conditions for various levels of motion sickness

[0048] The dynamic thermal comfort map is a multidimensional parameter mapping table. Table 2 shows the input parameter dimensions for the dynamic thermal comfort map, associating factors such as motion sickness level, ambient temperature, vehicle speed, and occupant size (input by the occupant via the vehicle computer) with thermal comfort control parameters. Table 3 shows a mapping table between motion sickness level and thermal environment management module parameters. Based on the occupant's physiological data, a predicted mean vote value (PMV) is calculated. The dynamic thermal comfort map sets the target range for the PMV corresponding to the second-level motion sickness state to -1.0 to -1.5. It also implements the following control parameter combinations: the seat cushion fan is set to a third speed level in reverse suction mode, the backrest fan is set to a first speed level in forward air supply mode, the heating pad is disabled, and the seatbelt air supply temperature is set to 16°C.

[0049] Parameter linkage rules: 1. Temperature linkage: Low temperature environment (-10℃~15℃): The power of all levels of thermal sensitive heating pads 122 is increased by 1 level (except level 2 / 3); High temperature environment (26℃~45℃): The air supply temperature of the porous sleeve structure 123 of the seat belt is reduced by an additional 2℃, and the fan speed is increased by 1 level; 2. Vehicle speed linkage adjustment strategy: >80km / h disables backrest fan pulse oscillation (to avoid airflow disturbance); 0-30km / h seat cushion fan 121 starts intermittent mode (runs for 2 minutes and rests for 30 seconds to reduce noise); 3. Body type differentiation linkage: S type: wind speed is reduced by 1 level (to avoid overcooling); L type: the power of the thermal heating pad 122 is increased by 1 level, and the air supply temperature of the porous sleeve structure 123 of the seat belt is increased by 2°C.

[0050] 4. Long-term motion sickness enhancement (duration > 10 minutes) linkage: Activate the "soothing mode" (low-frequency vibration) of the seat massage module (if equipped).

[0051] Table 2 Input parameter dimensions of dynamic thermal comfort map

[0052] Table 3 Treatment methods for different levels of motion sickness

[0053] The processor 131 receives occupant physiological data and determines the occupant's motion sickness level based on a motion sickness grading model, heart rate data, low-frequency power density values, high-frequency power density values, and respiratory rate. The sampling frequency is 10 Hz, and signal preprocessing includes 50 Hz power frequency filtering and 0.5-40 Hz bandpass filtering. Based on the motion sickness level, the processor queries a dynamic thermal comfort map and generates control instructions corresponding to the motion sickness level. These control instructions include the direction and speed level of the fan 121, the power level of the thermal heating pad 122, and the set temperature of the porous casing structure 123. These control instructions are transmitted to the execution units (fan 121, thermal heating pad 122, and porous casing structure 123) of each thermal environment management module 120 via the CAN (Controller Area Network) bus, with a refresh rate of 1 Hz. In the CAN protocol, data is transmitted in the form of "messages," each of which contains a unique identifier (ID). The execution units pre-configure filters to only receive messages with identifiers relevant to them. For example, in automotive electronics systems, door control units only receive commands with identifiers related to door control and do not process messages related to engine control, ensuring that commands reach the appropriate execution unit accurately. The CAN bus utilizes a non-destructive arbitration mechanism, allowing multiple master nodes to transmit data simultaneously. This arbitration process is based on identifier priority. When multiple nodes transmit messages simultaneously, messages with higher-priority identifiers gain bus control, while lower-priority nodes automatically stop transmitting to yield to the higher-priority node. This ensures that urgent or high-priority control commands are transmitted quickly and accurately, without being delayed or lost due to bus contention. The CAN bus protocol also specifies error detection methods such as cyclic redundancy checks (CRCs). The sending node calculates a checksum and includes it in the data frame. The receiving node verifies the data integrity using the CRC. If an error is detected, it requests a retransmission to ensure the accuracy of the transmitted data. CAN transceivers also typically include logic circuitry for synchronization of received data and error detection, enabling appropriate actions such as error reporting.

[0054] The embodiment of the present application realizes comprehensive real-time monitoring of physiological information such as the heart rate variability spectrum, respiratory rate and chest micro-vibration amplitude of the occupant through the arrangement of flexible piezoelectric film sensors and multi-channel pressure sensor arrays, overcoming the deficiency of the existing seat system in the ability to monitor the physiological information of the occupant; the flexible piezoelectric film sensor with a thickness of less than 5 mm and the surface covered with a breathable and non-slip fabric layer improves the accuracy and comfort of the measurement and solves the problem of poor comfort of traditional sensors; the multi-channel pressure sensor array is composed of at least three rectangular sensor units arranged in a triangle, which realizes comprehensive pressure distribution monitoring of the occupant's chest and improves the comprehensiveness and accuracy of the measurement; based on The motion sickness grading model can accurately identify the level of motion sickness of the occupants by calculating the low-frequency power density value and the high-frequency power density value in real time, overcoming the subjectivity and limitations of traditional manual judgment of motion sickness. By switching between the forward air supply mode and the reverse air suction mode of the brushless DC fan, and adopting the pulse oscillation working mode, it achieves precise adjustment of the seat thermal environment and meets the thermal comfort needs of occupants in different motion sickness states. Through the setting of the intelligent decision-making unit, the PTC heating pad can be forcibly disabled when the motion sickness level reaches level two or above, and is connected to the vehicle air-conditioning system through a porous sleeve structure, realizing all-round comfort management of the occupants and effectively alleviating motion sickness symptoms.

[0055] In an optional embodiment of the present application, the motion sickness protection system 100 further includes a timing module; The timing module is used to start recording time when the flexible piezoelectric film sensor 111 and the multi-channel pressure sensor array 112 generate physiological data; The multi-channel pressure sensor array 112 is also used to generate a pressure range; The processor 131 is further configured to obtain a pressure range and a corresponding duration. If the pressure range is smaller than a pressure threshold and the duration is greater than a time threshold, a sitting posture misalignment signal is generated.

[0056] When the flexible piezoelectric film sensor 111 and the multi-channel pressure sensor array 112 generate physiological data, the timing module starts recording time and sends it to the processor 131. The multi-channel pressure sensor array 112 generates the pressure range of the occupant on the seat and sends it to the processor 131. The processor 131 receives the pressure range and duration. If the pressure range is less than the pressure threshold and the duration is higher than the time threshold, a sitting posture misalignment signal is generated.

[0057] In the embodiments of the present application, the seat's pressure range is determined using pressure signals generated by a multi-channel pressure sensor array. Specifically, when a person sits on the seat, pressure is transmitted to the multi-channel pressure sensor array, generating an electrical signal. By collecting the locations of the signal generation locations, the pressure location can be determined, thereby mapping the passenger's approximate sitting position. Generally speaking, the pressure areas that can be identified in a normal sitting position are the buttocks and thighs. If the pressure signal feedback from the pressure sensor is missing from a certain area (for example, when the legs are crossed), the pressure range is determined to be less than a pressure threshold. (Specifically, the area ratio of the buttocks and thighs can be determined based on the positional contour information of the pressure sensor signals in the normal sitting position. A numerical range for the ratio can be set to determine whether both legs are in contact with the seat cushion. Alternatively, the pressure contour can be analyzed. If the contour of the buttocks or one leg is missing, the pressure range is determined to be less than the pressure threshold.) If the duration of the action exceeds the time threshold, i.e., the action is maintained for an extended period, if the passenger is asleep or experiencing motion sickness, maintaining a posture similar to crossing the legs for an extended period can easily cause leg soreness and affect blood supply, leading to increasingly severe motion sickness. Therefore, when an improper sitting posture is detected, a reminder can be issued.

[0058] In an optional embodiment of the present application, the memory 132 further stores a standard sitting posture diagram; The processor 131 is also used to, after generating a sitting posture misalignment signal, determine a difference interval based on the standard sitting posture diagram and the pressure range if the heart rate data is within a preset range, and control the fan 121 to adjust the wind speed so that the fan 121 acts on the occupant's buttocks position within the difference interval.

[0059] The memory 132 also stores a standard sitting posture diagram. After generating a sitting posture misalignment signal, if the signal characteristics obtained by the flexible piezoelectric film sensor 111 show that the passenger's heart rate is within a normal range, the processor 131 obtains the standard sitting posture diagram pre-stored in the memory 132, and compares the standard sitting posture diagram with the current pressure range of the multi-channel pressure sensor array 112, marking the difference interval and the overlapping interval; locates the center of the seat, and reciprocally controls the brushless DC fan 121 in the difference interval from near to far, and pulse-oscillates the hip position of the occupant in the difference area by adjusting the wind speed.

[0060] The embodiment of the present application uses pulse oscillation to impact the buttocks. While blowing air, it generates a slight impact force that acts on the passenger's buttocks, causing a slight numbness. The specific impact site is the buttocks on the side lacking a pressure signal. For example, the source of the pressure signal can be divided into the left buttocks, left leg, right buttocks, and right leg. If the left leg signal is missing, the left buttocks will be impacted. If the right leg signal is missing, the right buttocks will be impacted. The resulting numbness will cause the passenger to unconsciously change their posture. For example, a passenger who is soundly asleep will experience a slight itching sensation on their buttocks after the numbness impact. This sensation will not affect the passenger's sleep state at this time, but due to the presence of this sensation, the body will subconsciously move. For example, if a passenger who has crossed their legs for a long time and is soundly asleep will, under this stimulation, move their legs to resist the itching sensation, thereby achieving the purpose of changing posture. That is, the fan of this solution can also improve the passenger's sitting posture, thereby further reducing the factors that affect passengers' motion sickness.

[0061] In an optional embodiment of the present application, the motion sickness protection system 100 further includes a user interaction module 140 , which includes a speech recognition unit 141 and a mobile terminal communication interface 142 ; The voice recognition unit 141 is configured to respond to the occupant's voice commands and override the control commands generated by the intelligent decision module 130; The mobile terminal communication interface 142 is used to upload motion sickness history data and receive optimized control parameters to optimize the motion sickness grading model.

[0062] The voice recognition unit 141, comprised of a microphone array and a digital signal processor, supports far-field voice recognition, with a pickup range of up to 2 meters and a recognition accuracy exceeding 95%. The unit is configured to respond to occupant voice commands and override control commands generated by the intelligent decision-making module 130. When the unit receives a command containing keywords such as "dizzy," "uncomfortable," or "motion sickness," it immediately executes the control strategy for the second-level motion sickness state and maintains this strategy for at least 10 minutes.

[0063] Mobile terminal communication interface 142 utilizes dual-mode Bluetooth 5.0 and Wi-Fi (Wireless Fidelity) communication modules, supporting data exchange with smartphone applications for uploading historical motion sickness data and receiving optimized control parameters. The mobile terminal application records the time, location, duration, and severity of occupant motion sickness episodes and, combined with vehicle driving conditions and environmental data, optimizes personalized motion sickness prevention strategies using cloud-based algorithms.

[0064] The embodiment of the present application can perform interactive operations based on the voice commands of the passengers, and at the same time realize the uploading of motion sickness historical data and the reception of optimization parameters, thereby improving the intelligence level and practicality of the system and meeting the needs of efficient and non-invasive health management.

[0065] In an optional embodiment of the present application, the motion sickness protection system 100 further includes a temperature detection module, which is used to detect the ambient temperature inside and outside the vehicle; the porous sleeve structure is connected to the vehicle air conditioning system through a flexible channel, and the flexible channel is provided with a switch; The intelligent decision module 130 is also used to turn on the switch if the outside temperature is higher than a preset threshold; and to turn off the switch if the difference between the inside temperature and the temperature set by the vehicle air conditioner is within a preset range.

[0066] The motion sickness protection system 100 is also equipped with a temperature detection module, which can be used to detect the ambient temperature inside and outside the vehicle. The porous sleeve structure 123 is connected to the vehicle's onboard air conditioning system through a flexible channel, and the flexible channel is provided with a switch.

[0067] The intelligent decision module 130 can also obtain the ambient temperature detected by the temperature detection module. If the temperature outside the vehicle is higher than a preset threshold, the switch provided between the porous sleeve structure 123 and the vehicle air conditioning system via the flexible air duct is turned on. If the difference between the temperature inside the vehicle and the temperature set by the vehicle air conditioning is within the threshold range, the switch provided between the porous sleeve structure 123 and the vehicle air conditioning system via the flexible air duct is turned off. The embodiment of the present application can intelligently shut down the ventilation of the porous sleeve, turning it on when the passenger needs to be cooled quickly and closing it when not needed. It can maximize the cooling efficiency and actively turn off the switch after the ambient temperature drops to prevent passengers from having uncomfortable reactions.

[0068] like Figure 2 , which is a flow chart of the motion sickness protection system 100 executing the motion sickness protection method.

[0069] Step 210, inputting the collected physiological data; Step 220, calculating the PMV value based on the physiological data to determine the motion sickness level; Step 230, querying the PMV value, if the PMV value is within the target range of -0.5 to +0.5, determining that the motion sickness level is 0; Step 240 , querying the PMV value, and if the PMV value is within the target range of -0.8 to -1.0, determining that the motion sickness level is 1; Step 250 , querying the PMV value, and if the PMV value is within the target range of -1.0 to -1.5, determining that the motion sickness level is 2; Step 260, querying the PMV value, if the PMV value is within the target range of -1.5 to -2.5, determining that the motion sickness level is 3; Step 270 , generating basic control instructions based on the temperature linkage rule / occupant body type differentiation linkage rule and the motion sickness level; Step 280 , superimposing a vehicle speed linkage adjustment rule on the basis of the basic control instruction; Step 290, superimposing long-term motion sickness enhancement linkage rules; Step 2010: Generate a final control instruction and send it to the execution unit.

[0070] The embodiment of the present application realizes comprehensive real-time monitoring of physiological information such as the heart rate variability spectrum, respiratory rate and chest micro-vibration amplitude of the occupants through the setting of flexible piezoelectric film sensors and multi-channel pressure sensor arrays, overcoming the deficiency of related seat systems in lacking the ability to monitor the physiological information of the occupants; a flexible piezoelectric film sensor with a thickness of less than 5 mm and a breathable and non-slip fabric layer on the surface is used to improve the accuracy and comfort of the measurement and solve the problem of poor comfort of traditional sensors; the multi-channel pressure sensor array is composed of at least three rectangular sensor units arranged in a triangle, which realizes comprehensive pressure distribution monitoring of the occupants' chests and improves the comprehensiveness and accuracy of the measurement; based on the motion sickness grading model, the low-frequency power density value and the high-frequency power density value are calculated in real time, and the motion sickness state level of the occupants can be accurately identified to overcome the problem. It overcomes the subjectivity and limitations of traditional manual judgment of motion sickness; through the switching of the brushless DC fan's forward air supply mode and reverse air suction mode, and the adoption of a pulse oscillation working mode, it achieves precise adjustment of the seat's thermal environment, meeting the thermal comfort needs of occupants in different motion sickness states; through the setting of an intelligent decision-making unit, the thermal heating pad can be forcibly disabled when the motion sickness level reaches level two or above, and is connected to the vehicle's air-conditioning system through a porous sleeve structure, achieving all-round comfort management for the occupants and effectively alleviating motion sickness symptoms; the system also has a voice recognition unit and a mobile terminal communication interface function, which can interact according to the occupants' voice commands, while realizing the uploading of motion sickness historical data and the reception of optimization parameters, thereby improving the intelligence and practicality of the system and meeting the needs of efficient and non-sensitive health management.

[0071] Figure 3 It is a structural diagram of the smart seat shown in an embodiment of the present application.

[0072] See also Figure 3 The smart seat 300 includes a motion sickness protection system 100, which includes a physiological monitoring module 110, a thermal environment management module 120, and an intelligent decision-making module 130. The thermal environment management module 120 includes: multiple fans 121 embedded in the seat cushion, a thermosensitive heating pad 122 laid on the seat surface, and a porous sleeve structure 123 integrated into the seat belt; wherein: The physiological monitoring module 110 is used to monitor the physiological data of the occupant in real time; The intelligent decision module 130 is used to determine the occupant's motion sickness level based on physiological data and generate corresponding control instructions based on the motion sickness level; the control instructions include the steering mode and speed level of the fan 121, the power level of the thermal heating pad 122, and the set temperature of the porous sleeve structure 123; The thermal environment management module 120 is used to control the fan 121, the thermosensitive heating pad 122 and the porous sleeve structure 123 to operate according to the control instructions.

[0073] In order to monitor the motion sickness of passengers in real time, alleviate the motion sickness of passengers, and improve the passenger riding experience, an embodiment of the present application provides a motion sickness protection system 100, which includes a physiological monitoring module 110, a thermal environment management module 120, and an intelligent decision-making module 130.

[0074] The physiological monitoring module 110 can monitor the physiological data of the occupant in real time and send the physiological data to the intelligent decision-making module 130 .

[0075] The intelligent decision-making module 130 can determine the occupant's motion sickness level based on the physiological data sent by the physiological monitoring module 110, generate corresponding control instructions based on the motion sickness level, and send the control instructions to the thermal environment management module 120.

[0076] The thermal environment management module 120 includes multiple fans 121 embedded in the seat cushion, a thermosensitive heating pad 122 laid on the seat surface, and a porous sleeve structure 123 integrated into the seat belt. The control instructions include the steering mode and speed level of the fans 121, the power level of the thermosensitive heating pad 122, and the set temperature of the porous sleeve structure 123. In one example, the number of fans 121 can be set to four, respectively, located on the front and rear sides of the seat cushion. Four independent brushless motors are used to control the fans 121. The fans 121 are powered by a 12V DC voltage, have a rated power of 5W, and a maximum air volume of 0.3 cubic meters per minute. The fans 121 have a forward air supply mode and a reverse air suction mode. The maximum air volume in the reverse air suction mode is 1.5 times that of the forward air supply mode, reaching 0.45 cubic meters per minute. The fan in the seat cushion area supports pulse oscillation working mode, and the fan 121 is set to operate in a cycle of 3 seconds on and 1 second off. This working mode can effectively reduce the occupants' adaptability to airflow and improve the thermal comfort perception effect.

[0077] The thermal heating pad 122 is made of a PTC material, whose resistance increases with increasing temperature. It is applied to the seat surface and can consist of one or more pads, enabling different temperature adjustments for different areas of the backrest. This solution employs a unified setting, regulating the backrest temperature to a uniform setting. The different temperatures on the dynamic thermal comfort map correspond to the various settings of the thermal heating pad 122. The temperature on the dynamic thermal comfort map is the temperature that best relieves motion sickness symptoms. The thermal heating pad 122 is constructed from a composite of carbon fiber heating wire and polyamide material, with a thickness of 2 mm. It has a power density of 500 W / m², a maximum surface temperature limit of below 45°C, and three power adjustment levels. The thermal heating pad 122 is forcibly disabled if the intelligent decision module 130 determines the occupant's motion sickness level reaches level 2 or above, and remains disabled until the motion sickness level drops below level 1. This design effectively prevents motion sickness from exacerbating the discomfort caused by the thermal environment.

[0078] The porous sleeve structure 123 inside the seat belt is made of aluminum alloy, with a wall thickness of 0.8 mm, an inner diameter of 12 mm, a pore diameter of 0.5 mm, and a pore density of 25 per square centimeter, evenly distributed in the seat belt area near the occupant's neck and chest. The inner wall of the porous sleeve is coated with a thermally conductive silicone layer with a thickness of 0.3 mm and a thermal conductivity coefficient of 1.5 W / (m·K). The porous sleeve structure 123 is connected to the vehicle's air conditioning system through a flexible air duct with a diameter of 15 mm. The flexible air duct is made of polyurethane, has a smooth inner wall, and a flow resistance coefficient of less than 0.05. The seat belt air supply temperature setting range is 3 to 5 degrees Celsius lower than the vehicle's air conditioning setting temperature, and is precisely controlled by an independent temperature sensor and electronically controlled valve.

[0079] The smart seat provided in the embodiment of the present application can monitor the passenger's motion sickness state while adjusting the temperature of the car seat according to the passenger's motion sickness state, thereby alleviating the motion sickness condition and improving the passenger's riding experience.

[0080] Regarding the device in the above embodiment, the specific manner in which each module performs operations has been described in detail in the embodiment of the motion sickness protection system, and will not be elaborated again here.

[0081] The above are only embodiments of the present invention. The invention is not limited to the fields involved in this implementation case. Common knowledge such as the known specific structures and characteristics in the scheme is not described in detail here. Ordinary technicians in the relevant field are aware of all common technical knowledge in the technical field to which the invention belongs before the application date or priority date, can obtain all existing technologies in the field, and have the ability to apply conventional experimental means before that date. Ordinary technicians in the relevant field can improve and implement this scheme in combination with their own abilities under the inspiration given by this application. Some typical known structures or known methods should not become obstacles for ordinary technicians in the relevant field to implement this application. It should be pointed out that for those skilled in the art, without departing from the structure of the present invention, several variations and improvements can be made, which should also be regarded as the scope of protection of the present invention. These will not affect the effect of the implementation of the present invention and the practicality of the patent. The scope of protection required by this application shall be based on the content of its claims, and the specific implementation methods and other records in the specification can be used to interpret the content of the claims.

[0082] In addition, the method according to the present application may also be implemented as a computer program or a computer program product, which includes computer program code instructions for executing some or all of the steps in the above method of the present application.

[0083] Alternatively, the present application can also be implemented as a computer-readable storage medium (or non-transitory machine-readable storage medium or machine-readable storage medium), which stores executable code (or computer program or computer instruction code) and, when executed by a processor of an electronic device (or server, etc.), enables the processor to perform part or all of the steps of the above-mentioned method according to the present application.

[0084] The present application also provides a computer program product, which includes computer instructions, and when the computer instructions are executed by a processor, the method described above is implemented.

[0085] The embodiments of the present application have been described above. The above description is exemplary, not exhaustive, and is not limited to the disclosed embodiments. Many modifications and variations will be apparent to those skilled in the art without departing from the scope and spirit of the described embodiments. The terminology used herein is selected to best explain the principles of the embodiments, their practical applications, or improvements to the technology in the market, or to enable other persons skilled in the art to understand the embodiments disclosed herein.

Claims

1. A motion sickness protection system, characterized in that: The system includes a physiological monitoring module, a thermal environment management module, and an intelligent decision-making module; the thermal environment management module includes: multiple fans embedded in the seat cushion, a thermosensitive heating pad laid on the seat surface, and a porous sleeve structure integrated into the seat belt; wherein: The physiological monitoring module is used to monitor the physiological data of the occupant in real time; The intelligent decision-making module is used to determine the occupant's motion sickness level based on the physiological data and generate corresponding control instructions based on the motion sickness level; the control instructions include a steering mode and a speed level of the fan, a power level of the thermal heating pad, and a set temperature of the porous sleeve structure; The thermal environment management module is used to control the fan, the thermosensitive heating pad and the porous sleeve structure to operate according to the control instructions.

2. The motion sickness protection system according to claim 1, characterized in that: The physiological data includes heart rate data, low-frequency power density values ​​and high-frequency power density values, respiratory rate, and chest micro-vibration amplitude; the physiological monitoring module includes a flexible piezoelectric film sensor disposed in the ischial region of the seat cushion and a multi-channel pressure sensor array disposed in the thoracic vertebra region of the backrest; The flexible piezoelectric film sensor is used to collect the passenger's heart rate data in real time and calculate the low-frequency power density value and the high-frequency power density value; The multi-channel pressure sensor array is used to monitor the breathing frequency and chest micro-vibration amplitude of the occupant.

3. The motion sickness protection system according to claim 2, characterized in that: The intelligent decision-making module includes a processor and a memory, wherein the memory stores a motion sickness grading model and a dynamic thermal comfort map; The processor is used to determine the occupant's motion sickness level based on the motion sickness grading model and the heart rate data, the low-frequency power density value, the high-frequency power density value, and the breathing rate; query the dynamic thermal comfort map according to the motion sickness level, and generate a control instruction corresponding to the motion sickness level.

4. The motion sickness protection system according to claim 3, characterized in that: The system also includes a timing module; The timing module is used to start recording time when the flexible piezoelectric film sensor and the multi-channel pressure sensor array generate the physiological data; The multi-channel pressure sensor array is further used to generate a pressure range; The processor is further configured to obtain the pressure range and the corresponding duration, and generate a sitting posture misalignment signal if the pressure range is smaller than a pressure threshold and the duration is greater than a time threshold.

5. The motion sickness protection system according to claim 4, characterized in that: The memory also stores a standard sitting posture diagram; The processor is also used to, after generating a sitting posture misalignment signal, determine a difference interval based on the standard sitting posture diagram and the pressure range if the heart rate data is within a preset range, and control the fan to adjust the wind speed so that the fan acts on the occupant's buttocks position within the difference interval.

6. The motion sickness protection system according to claim 3, characterized in that: The system further comprises a user interaction module, wherein the user interaction module comprises a speech recognition unit and a mobile terminal communication interface; The voice recognition unit is configured to respond to the occupant's voice command and override the control command generated by the intelligent decision module; The mobile terminal communication interface is used to upload motion sickness historical data and receive optimized control parameters to optimize the motion sickness grading model.

7. The motion sickness protection system according to claim 1, characterized in that The system also includes a temperature detection module, which is used to detect the ambient temperature inside and outside the vehicle; the porous sleeve structure is connected to the vehicle air conditioning system through a flexible channel, and the flexible channel is provided with a switch; The intelligent decision-making module is also used to turn on the switch if the temperature outside the vehicle is higher than a preset threshold; and turn off the switch if the difference between the temperature inside the vehicle and the temperature set by the vehicle air conditioner is within a preset range.

8. The motion sickness protection system according to claim 2, characterized in that: The thickness of the flexible piezoelectric film sensor is less than or equal to 5 mm. The surface of the flexible piezoelectric film sensor is covered with a breathable and non-slip fabric layer, and is connected to the analog signal input port of the intelligent decision-making module through a shielded wire.

9. The motion sickness protection system according to claim 2, characterized in that: The multi-channel pressure sensor array is composed of at least three rectangular sensing units arranged in a triangle. The length of the sensing unit is greater than or equal to 5 cm, the width is greater than or equal to 2 cm, and the distance between adjacent sensing units is less than or equal to 3 cm.

10. A smart chair, characterized in that: The motion sickness protection system comprises the motion sickness protection system according to any one of claims 1 to 9.

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