Active adjustment method for seat size

Abstract

The present invention discloses a method for actively adjusting the size of a seat. The seat includes an adjustable seat plate, backrest, lumbar support, and neck support. The seat collects pressure signals from pressure sensors arranged on the seat surface corresponding to various parts of the human body through a pressure sensing system. The pressure signals are identified, extracted, and analyzed by a seat sensing control system to match different comfortable seat sizes for different body types. Different adjustment steps are adopted in different sitting posture modes to achieve the goal of actively adjusting the support performance size of the seat to a comfortable seat size. The present invention utilizes multiple pressure algorithms to analyze the pressure distribution and change characteristics of multiple groups of collected pressure signals to identify the body type, sitting posture, and change trend of the occupant, actively adjust the seat size for comfort, and increase the comfort of the occupant. This not only avoids the complexity of sensing channels and multi-dimensional information fusion caused by multiple types of sensors, but also reduces the cost of sensor use and computing time.

Description

Technical Field

[0001] The present invention relates to the field of seat adjustment, and in particular to a method for actively adjusting seat size. Background Art

[0002] Prior art 1:

[0003] The existing Chinese invention patent number CN110843613A discloses a method for automatic seat adjustment based on ergonomics. The method provides a reasonable seat size for the driver's seat and for drivers of different heights and weights, as well as an automatic adjustment method, such as placing a hand on the end of the armrest to activate automatic adjustment; judging the distance between the driver and the steering wheel based on the distance sensor and adjusting the seat forward and backward; judging the position of the driver's eyes based on the camera and adjusting the seat height; and adjusting the seat back angle based on the force applied to the seat cushion and backrest. The defects of the existing technology are: 1. This technology requires a person to place a hand on the end of the armrest as a "command" to activate the automatic adjustment of the seat. 2. This technology provides initial comfort and cannot provide dynamic comfort as the riding time or riding status changes.

[0004] Prior art 2:

[0005] Existing Chinese invention patent number CN109367440B discloses a seat adjustment method and device, which uses a camera to capture a video image of the seat; separately captures the pressure on the headrest, backrest, and seat cushion; and when the seat cushion pressure exceeds a set value, determines through image recognition that someone is present, initiates seat adjustment. The backrest angle adjustment includes: when the headrest pressure exceeds a set value, the backrest rotates in a reclining direction; when both the headrest pressure and backrest pressure are zero and the person is not in a forward leaning position, the backrest rotates in a forward leaning direction; and seat translation adjustment: when the video image identifies that the person in the seat is in a reclining position and the backrest pressure is greater than a set value, the seat moves backward a set distance; when the video image identifies that the person in the seat is in a forward leaning position and the backrest pressure is zero, the seat translation adjustment mechanism moves forward a set distance, and the above operations are repeated to achieve intelligent seat adjustment. The second prior art has the following drawbacks: 1. It requires two sensing devices, a camera and a pressure sensor, to sense behavior, increasing the cost of the device. 2. Judgment based solely on behavior, lacking logical judgment of behavioral intent, can easily lead to misadjustment. Summary of the Invention

[0006] In order to overcome the above technical problems, the purpose of the present invention is to provide a method for actively adjusting seat size, which is based on a seat that actively matches the seat adjustment needs of passengers of different body shapes and the seat adjustment needs during use. The seat automatically adjusts to a comfortable seat size to meet the comfort needs of the passengers.

[0007] The present invention provides the following technical solutions:

[0008] A method for actively adjusting the size of a seat, wherein the seat comprises an adjustable seat plate and a backrest, wherein the backrest is provided with an adjustable lumbar support and a neck support at the waist and neck, respectively, and wherein the method further comprises:

[0009] A pressure sensing system for collecting real-time pressure values of a human body at different body positions on the seat, comprising a plurality of pressure sensors arranged on the seat surface at different body positions;

[0010] A seat sensing control system for sensing, analyzing, and mapping pressure signals and controlling a motor to adjust seat dimensions; the seat sensing control system further includes a pressure analysis module, a mapping model, and the motor control module electrically connected in sequence, and the pressure sensor is electrically connected to the pressure analysis module;

[0011] an adjustment system, configured to adjust the dimensions of different parts of the seat according to a motor control signal received from the motor control module, the adjustment system being electrically connected to the motor control module;

[0012] Based on the seat, the method for actively adjusting its size includes the following steps:

[0013] S1: receiving real-time pressure values and identifying seat surface pressure distribution characteristics, including the amplitude and frequency of pressure changes, through the pressure analysis module, determining a sitting posture mode and determining a comfortable pressure distribution target;

[0014] S2: The comfortable pressure distribution target is converted into the comfortable seat size through the mapping model to obtain the comfortable seat size; the mapping model stores the comfortable pressure distribution target and the corresponding comfortable seat size according to the sitting posture mode classification

[0015] S3: transmitting the comfortable seat size to the motor control module, the motor control module obtaining the current seat size, comparing the comfortable seat size with the current seat size, and calculating voltage signals corresponding to different parts of the seat that achieve the comfortable seat size;

[0016] S4: The motor control module transmits voltage signals of different parts to the adjustment system, and the adjustment system adjusts the support performance size of the seat to a comfortable seat size;

[0017] The sitting posture modes include initial seat support performance and size adjustment to provide comfort during the first ride, timed seat adjustment as the ride progresses, active seat adjustment to accommodate local body discomfort during the ride, and active seat adjustment to accommodate general body discomfort during the ride, which correspond to the first adjustment mode, the second adjustment mode, the third adjustment mode, and the fourth adjustment mode. The pressure analysis module determines whether the sitting posture mode is in the first, second, third, or fourth adjustment mode based on the pressure information collected by the pressure sensors at different locations.

[0018] When the seat is powered on, it automatically enters the first adjustment mode;

[0019] Every 30 seconds thereafter, the pressure analysis module uses the pressure algorithm D to determine whether local discomfort occurs. If so, the system enters the third adjustment mode.

[0020] Every 2 minutes, the pressure analysis module uses the pressure algorithm H to determine whether systemic discomfort occurs. If so, the fourth adjustment mode is entered;

[0021] Every 30 minutes, the pressure analysis module uses the pressure algorithm D to determine whether the whole body is comfortable within 30 minutes. If so, the second adjustment mode is entered;

[0022] calculating comfortable pressure distribution targets respectively through the first, second, third and fourth adjustment modes, and adjusting the support performance size of the seat to a comfortable seat size according to the comfortable pressure distribution targets;

[0023] The pressure algorithm D compares the pressure value of a certain pressure sensor within 30 seconds and the change amplitude is more than 20% and the change frequency is more than 3 times. It is determined that the pressure change part is uncomfortable, otherwise it is not uncomfortable.

[0024] The pressure algorithm H compares multiple pressure sensors of the seat and determines that if the pressure value changes by more than 20% and the frequency of change is more than 3 times within 2 minutes, it will be judged that the whole body is uncomfortable; and based on the pressure change amplitude of different parts, the part with the largest pressure change is selected.

[0025] According to some embodiments, the active adjustment method when the pressure analysis module determines that the sitting posture mode is the first adjustment mode is to perform the following steps in sequence:

[0026] Step S1-1: using the pressure algorithm A and the pressure algorithm B of the pressure analysis module, identifying the passenger's body shape and the corresponding comfortable static pressure distribution, wherein the comfortable pressure distribution target is the comfortable static pressure distribution;

[0027] Steps S2, S3 and S4: the seat support performance size is adjusted to a comfortable seat size, and the first adjustment mode ends;

[0028] The pressure algorithm A is a neural network model that predicts the body shape of the occupant using the pressure values collected by the multiple pressure sensors, and in which the body shape characteristics of the occupant are identified using the static pressure distribution in the sitting state;

[0029] Pressure algorithm B is the comfortable static pressure distribution corresponding to different body shape characteristics. Different body shape parameters are input through pressure algorithm A to obtain the corresponding comfortable static pressure distribution.

[0030] According to some embodiments,

[0031] The active adjustment method when the pressure analysis module determines that the sitting posture mode is the second adjustment mode is to perform the following steps in sequence:

[0032] Step S1-2, using the pressure algorithm E of the pressure analysis module, starting the next pressure distribution target in the time series to predict the comfortable pressure distribution of the occupant;

[0033] Steps S2, S3 and S4: the seat support performance size is adjusted to a comfortable seat size, and the second adjustment mode ends;

[0034] The pressure algorithm E is a preset comfortable chair pressure value for passengers of different body types in a time series with 30 minutes as a node.

[0035] According to some embodiments,

[0036] The active adjustment method when the pressure analysis module determines that the sitting posture mode is the third adjustment mode is to perform the following steps in sequence:

[0037] Step S1-3, obtaining a comfortable pressure distribution target for the uncomfortable human body part through the pressure algorithm F of the pressure analysis module;

[0038] Steps S2, S3, and S4;

[0039] Step S5: Within 2 minutes after the local pressure is adjusted, the pressure analysis module's pressure algorithm D is used to determine whether the current sitting posture is uncomfortable. If so, the pressure analysis module's pressure algorithm G is used to predict the target pressure distribution for the local seat adjustment again, and the process returns to step S2. If not, the seat is adjusted to a comfortable seat size, and the third adjustment mode ends.

[0040] wherein the pressure algorithm F selects the human body part with the largest pressure variation amplitude to obtain the target pressure distribution of the uncomfortable human body part, which is selected from the pressure algorithm F1 or the pressure algorithm F2;

[0041] The pressure algorithm F1 identifies the amplitude of pressure value changes. When the amplitude of pressure value changes is between 20% and 40%, if the pressure value of the body part has been at the upper end of the comfortable pressure distribution range of the corresponding body part of the occupant over the past 30 minutes, that is, in the lower 50% of the comfortable pressure value interval percentage, then the body part is determined to be trending towards a low pressure value, that is, the current pressure interval percentage - 25%; if the pressure value of the body part has been at the lower end of the comfortable pressure distribution range of the corresponding body part of the occupant over the past 30 minutes, that is, in the upper 50% of the comfortable pressure interval percentage, then the body part is determined to be trending towards a high pressure value, that is, the current pressure interval percentage + 25%;

[0042] The pressure algorithm F2 identifies the amplitude of pressure value changes. When the amplitude of pressure value change is greater than 40%, if the pressure value of the body part has been at the high end of the comfortable pressure distribution range of the corresponding body part of the occupant over the past 30 minutes, that is, in the bottom 50% of the comfortable pressure value interval percentage, then the body part is determined to be trending towards a low pressure value, that is, the current pressure value interval percentage -50%; if the pressure value of the body part has been at the low end of the comfortable pressure distribution range of the corresponding body part of the occupant over the past 30 minutes, that is, in the top 50% of the comfortable pressure value interval percentage, then the body part is determined to be trending towards a high pressure value, that is, the current pressure value interval percentage +50%;

[0043] The pressure algorithm G: If the current body pressure distribution is at the high value of the comfortable pressure distribution range, that is, the bottom 25% of the comfortable pressure value range, then the pressure value of the body part is planned to be reduced by 25% of the percentage every 2 minutes until it cannot be reduced by 25% again. The pressure value is increased to 100% of the comfortable pressure range percentage and then reduced by 25% of the percentage until it reaches 1% of the percentage.

[0044] According to some embodiments,

[0045] The active adjustment method when the pressure analysis module determines that the sitting posture mode is the fourth adjustment mode is to perform the following steps in sequence:

[0046] Step S1-4, analyzing the location with the largest pressure variation, and obtaining a target pressure distribution for the location with the largest pressure variation using the pressure algorithm F of the pressure analysis module, wherein the target comfortable pressure distribution is the target pressure distribution for the location with the largest pressure variation;

[0047] Step S2;

[0048] Step S2-1: Based on the comfortable seat size of the part with the largest pressure variation, the seat size of other parts is obtained by using the pressure algorithm I of the pressure analysis module;

[0049] Steps S3 and S4;

[0050] S6: Within 2 minutes after the seat support performance size is adjusted, the pressure analysis module uses the pressure algorithm D to determine whether the current sitting posture is uncomfortable. If so, S7 is executed; if not, the seat support size is adjusted to the final comfortable seat size, and the fourth adjustment mode ends.

[0051] S7: Determine the target pressure distribution for re-adjustment of the seat part with the largest pressure change amplitude through the pressure algorithm G of the pressure analysis module, execute steps S2, S3, and S4 in sequence, and return to S6.

[0052] The pressure algorithm I includes a correlation function of the support performance dimensions of the plurality of seats, and the support performance dimensions of the remaining seats are obtained by using the correlation function according to the comfortable seat dimension at the location with the largest pressure variation.

[0053] The pressure algorithm G: If the current body pressure distribution is at the high value of the comfortable pressure distribution range, that is, the bottom 25% of the comfortable pressure value range, then the pressure value of the body part is planned to be reduced by 25% of the percentage every 2 minutes until it cannot be reduced by 25% again. The pressure value is increased to 100% of the comfortable pressure range percentage and then reduced by 25% of the percentage until it reaches 1% of the percentage.

[0054] According to some embodiments, the pressure sensors are symmetrically arranged on the neck, back of the shoulder blades, waist, ischial tuberosity and thigh root of the seat.

[0055] According to some embodiments, the adjustment system can adjust the supporting performance dimensions of multiple seats, which includes a seat height adjustment system, a seat plate inclination adjustment system, a backrest inclination adjustment system, a lumbar support thickness adjustment system, a lumbar support height adjustment system, a neck support thickness adjustment system and a neck support height adjustment system, which respectively adjust the seat height, seat plate inclination, backrest inclination, lumbar support thickness, lumbar support height, neck support thickness and neck support height.

[0056] Compared with the prior art, the present invention has the following beneficial effects:

[0057] (1) The present invention monitors the sitting pressure through multiple symmetrically distributed pressure sensors, and analyzes multiple groups of corresponding pressure distribution and change characteristics through a pressure analysis module to identify the passenger's body shape, sitting posture and change trend, and actively adjusts the seat size for comfort through the cooperation of the motor control module and the servo motor. This not only avoids the complexity of the sensing channel and multi-dimensional information fusion caused by multiple types of sensors, reduces the sensor usage cost and coupling calculation time, but also predicts the passenger's intention to change the sitting posture, and actively adjusts without the passenger issuing instructions, thereby increasing the passenger's comfort.

[0058] The static pressure distribution in the sitting position is used to identify the passenger's body shape, and the corresponding comfortable seat size is provided based on the body shape. The seat is automatically adjusted to a comfortable seat size, which reduces the need for the passenger to actively input body dimensions and the number of steps for users to adjust the seat size independently.

[0059] (2) The present invention provides automatic adjustment performance of the seat in the time dimension. According to the temporal change pattern of the pressure value, for example, the preset support performance size is adjusted once every 30 minutes to match the changing comfort needs, thereby reducing the passengers' conscious and multiple manual operations during long-term riding, and avoiding the aggravation of discomfort caused by untimely manual adjustment.

[0060] (3) The present invention formulates the seat adjustment range based on the pressure change range. For example, in the first gear, if the pressure value changes by ±20-40%, a corresponding 25% pressure increase or decrease adjustment is performed; in the second gear, if the pressure value changes by more than ±40%, a pressure increase or decrease adjustment of more than 50% is performed. Through precise graded adjustment, the seat adjustment intention of the passenger can be more accurately adapted.

[0061] (4) The present invention provides a cyclic adjustment method when automatic adjustment fails. For example, if the same part or the whole seat experiences discomfort again within 2 minutes after the seat is adjusted, the pressure value will be continuously increased or decreased by 25% of the comfortable pressure range, and the change will be repeated in a cyclic manner, so that the passenger can freely choose a relatively comfortable parameter within the comfort range.

[0062] (5) When performing full-body adjustments of multiple seat support performance dimensions, the present invention adjusts the seat dimensions corresponding to the body part with the largest pressure change. The remaining support performance dimensions are automatically calculated based on a correlation model of the remaining seat support performance dimensions to achieve the best overall comfort. Therefore, when performing full-body discomfort intervention, the best overall support performance dimensions are always provided. BRIEF DESCRIPTION OF THE DRAWINGS

[0063] Figure 1 This is a diagram illustrating seat adjustment dimensions according to an embodiment of the present invention.

[0064] Figure 2 for Figure 1 Schematic diagram of the corresponding regulation system.

[0065] Figure 3 FIG. 1 is a schematic diagram of the distribution of pressure sensors of a seat according to an embodiment of the present invention.

[0066] Figure 4 Schematic diagram of the control principle of the seat of the present invention.

[0067] Figure 5The present invention provides a comfortable seat adjustment index corresponding to the local pressure of the human body in an embodiment of a mapping model in the first adjustment mode.

[0068] Figure 6 This is a flow chart of the overall seat adjustment of the present invention.

[0069] Figure 7 This is a flow chart of the first adjustment mode of the present invention.

[0070] Figure 8 This is a flow chart of the second adjustment mode of the present invention.

[0071] Figure 9 This is a flow chart of the third adjustment mode of the present invention.

[0072] Figure 10 This is a flow chart of the fourth adjustment mode of the present invention. DETAILED DESCRIPTION

[0073] The present invention is described in detail below with reference to the embodiments and accompanying drawings. However, it should be understood that the embodiments and accompanying drawings are merely exemplary descriptions of the present invention and do not constitute any limitation on the scope of protection of the present invention. All reasonable variations and combinations within the scope of the inventive concept of the present invention fall within the scope of protection of the present invention.

[0074] The present invention provides an active seat size adjustment method that provides a comfortable riding experience for passengers by actively adjusting the seat's support dimensions, including seat height, seat pan inclination, backrest inclination, lumbar support height, lumbar support thickness, neck support height, and neck support thickness. This active adjustment method uses a pressure sensor to collect pressure signals, identify the passenger's body shape and sitting posture, and then automatically adjust the seat's support dimensions to match the passenger's body shape and sitting posture, proactively providing a comfortable seat size. The pressure sensor collects pressure signals and uses a seat sensing control system to identify the pressure distribution and changes on the seat surface, determine the trajectory and intention of the passenger's sitting posture changes, and then automatically adjust the seat's support dimensions to match the changing seat size requirements.

[0075] The present invention will be further described below with reference to the accompanying drawings.

[0076] like Figure 1 The support performance index of the seat includes the following 7 size indexes: seat height D_H, seat plate inclination

[0077] and neck support height D_N_2. Figure 2Adjustment of these seven dimensions is accomplished by seven adjustment systems: seat height adjustment, seat pan tilt adjustment, backrest tilt adjustment, lumbar support thickness adjustment, lumbar support height adjustment, neck support thickness adjustment, and neck support height adjustment. Each adjustment system includes a servo motor. These seven servo motors are electrically connected to a motor control module, which controls their forward and reverse rotation and rotation amount by inputting different voltage signals to each of the seven servo motors, thereby flexibly adjusting the corresponding seven dimensions of the seat.

[0078] The seat is equipped with a pressure sensing system, specifically, multiple pressure sensors are set at different parts of the seat, such as Figure 3 As shown in the figure, the black dots are pressure sensors. From top to bottom, there are 10 symmetrical pressure sensors on the seat surface at five locations: the neck, back of the shoulder blades, waist, ischial tuberosity, and thigh root. These pressure sensors collect pressure values at different parts of the human body during different sitting postures to analyze the user's body shape and sitting comfort. For example, if you need to understand the user's body shape, you can use the collected pressure values to analyze the static pressure distribution; if you need to understand the user's local movement, you can use the collected local pressure values to analyze local pressure changes; if you need to understand the user's whole-body movement, you can use the collected whole-body pressure changes to analyze whole-body pressure changes.

[0079] like Figure 4 The 10 pressure sensors on the seat are electrically connected to the seat sensing control system. The control process of the seat sensing control system includes a pressure analysis module, a mapping model, and the motor control module described above, which are electrically connected in sequence. The pressure analysis module uses different algorithms to calculate the real-time pressure data according to different pressure control targets, obtains a pressure distribution value, and inputs the pressure distribution value into the mapping model to obtain the corresponding comfortable seat support performance dimension value. The seat support performance dimension is input into the motor control module. The motor control module uses the seven dimensional indicators of the seat to determine the comfortable seat size and performs control adjustments based on the comfortable seat size. During specific adjustments, the motor control module determines the current seat size based on its stored historical records, calculates the adjustment amount in the positive or negative direction between the current seat size and the comfortable seat size, controls the output voltage according to the adjustment amount, and transmits the output voltage to the corresponding motor, which drives the adjustment of the seat size to the comfortable seat size.

[0080] When the passenger sits on the seat for the first time, he / she should adjust his / her sitting posture to ensure that the body is in full contact with the seat;

[0081] The active adjustment method of the seat size includes the following steps:

[0082] S1: receiving real-time pressure values and identifying seat surface pressure distribution characteristics, including the amplitude and frequency of pressure changes, through the pressure analysis module, determining a sitting posture mode and determining a comfortable pressure distribution target;

[0083] S2: The comfortable pressure distribution target is converted into the comfortable seat size through the mapping model to obtain the comfortable seat size; the mapping model stores the comfortable pressure distribution target and the corresponding comfortable seat size according to the sitting posture mode classification

[0084] S3: transmitting the comfortable seat size to the motor control module, the motor control module obtaining the current seat size, comparing the comfortable seat size with the current seat size, and calculating voltage signals corresponding to different parts of the seat that achieve the comfortable seat size;

[0085] S4: The motor control module transmits voltage signals of different parts to the adjustment system, and the adjustment system adjusts the support performance size of the seat to a comfortable seat size;

[0086] Ten symmetrical pressure sensors monitor sitting pressure, and the pressure analysis module's pressure algorithm calculates the occupant's body shape, sitting posture, and any changes. This algorithm then generates a target comfortable pressure distribution stored in a mapping model. This eliminates the complexity of sensing channels and multi-dimensional information fusion caused by multiple sensor types, reducing sensor costs and computation time.

[0087] The sitting modes include initial seat support performance size adjustment to provide comfort during the first ride, timed seat adjustment as the ride time increases, active seat adjustment for local body discomfort during the ride, and active seat adjustment for whole-body discomfort during the ride. They are named the first adjustment mode, the second adjustment mode, the third adjustment mode, and the fourth adjustment mode respectively. Different adjustment modes use different pressure algorithms and adjustment steps.

[0088] like Figure 6 When a passenger sits on the seat and the seat is powered on, it automatically enters the first adjustment mode;

[0089] Every 30 seconds thereafter, the pressure analysis module uses the pressure algorithm D to determine whether local discomfort occurs. If so, the system enters the third adjustment mode.

[0090] Every 2 minutes, the pressure analysis module uses the pressure algorithm H to determine whether systemic discomfort occurs. If so, the fourth adjustment mode is entered;

[0091] Every 30 minutes, the pressure analysis module uses the pressure algorithm D to determine whether the whole body is comfortable within 30 minutes. If so, the second adjustment mode is entered;

[0092] calculating comfortable pressure distribution targets respectively through the first, second, third and fourth adjustment modes, and adjusting the support performance size of the seat to a comfortable seat size according to the comfortable pressure distribution targets;

[0093] The pressure analysis module includes pressure algorithms A, B, D, E, F, G, H and I. The pressure analysis module judges through pressure algorithms D and H to enter different adjustment modes.

[0094] Pressure algorithm A is a neural network model that uses 10 pressure values to predict the passenger's body shape. In this neural network model, the passenger's body shape characteristics are identified through the static pressure distribution in the sitting state, and the relevant passenger's body shape parameters are obtained.

[0095] Pressure algorithm B is used to obtain the comfortable static pressure distribution corresponding to the body shape from pressure algorithm A. It obtains the corresponding comfortable static pressure distribution by inputting the body shape parameters calculated by pressure algorithm A.

[0096] Pressure algorithm D compares the pressure value of a certain pressure sensor. If the pressure value changes by more than 20% and the frequency of change is more than 3 times within 30 seconds, it is judged as discomfort at the pressure change location. Otherwise, it is not uncomfortable.

[0097] Pressure algorithm E is a preset comfortable pressure distribution for passengers of different body types in a time series with 30-minute nodes.

[0098] The pressure algorithm F identifies the magnitude of the change in the pressure value and is selected from the pressure algorithm F1 or the pressure algorithm F2.

[0099] Pressure algorithm F1 is a method for identifying the amplitude of pressure value changes. When the amplitude of pressure value change is between 20% and 40%, if the pressure value of this part is at the high end of the comfortable pressure distribution range of the corresponding part of the occupant in the past 30 minutes, that is, the last 50% of the comfortable pressure value interval percentage, then it is determined that the body part tends to a low pressure value, that is, the current pressure interval percentage -25%; if the pressure value of this part is at the low end of the comfortable pressure distribution range of the corresponding part of the occupant in the past 30 minutes, that is, the first 50% of the comfortable pressure interval percentage, then it is determined that the body part tends to a high pressure value, that is, the current pressure interval percentage +25%.

[0100] Pressure algorithm F2 is another method for identifying the amplitude of pressure value changes. When the amplitude of pressure value change is greater than 40%, if the pressure value of this part in the past 30 minutes is at the high value of the comfortable pressure distribution range of the corresponding part of the occupant, that is, the last 50% of the comfortable pressure value interval percentage, then it is determined that the body part tends to a low pressure value, that is, the current pressure interval percentage -50%; if the pressure value of this part in the past 30 minutes is at the low value of the comfortable pressure distribution range of the corresponding part of the occupant, that is, the first 50% of the comfortable pressure value interval percentage, then it is determined that the body part tends to a high pressure value, that is, the current pressure value interval percentage +50%.

[0101] Pressure algorithm G is that if the current body pressure distribution is at the high value of the comfortable pressure distribution range, that is, the last 25% of the comfortable pressure value range, then the pressure value of the body part is planned to be reduced by 25% of the percentage every 2 minutes until it cannot be reduced by 25% again. The pressure value is increased to 100% of the comfortable pressure range percentage and then reduced by 25% of the percentage until it reaches 1% of the percentage.

[0102] Pressure algorithm H compares all the pressure sensors in the seat and determines that if the pressure value changes by more than 20% and the frequency of change is more than 3 times within 2 minutes, the whole body is judged to be uncomfortable; and based on the pressure change amplitude of different parts, the part with the largest pressure change is selected.

[0103] Pressure Algorithm I includes seven correlation functions for seat support performance dimensions. Once some seat support performance dimensions are known, the remaining unknown seat support performance dimensions can be calculated using these correlation functions.

[0104] A mapping function is created between the pressure distribution value in the mapping model and the comfort seat support performance size. The pressure distribution value is input to obtain the corresponding seat support performance size. The corresponding comfort seat size is obtained through the mapping model and input into the motor control module to adjust the seat size.

[0105] The seat sensing control system automatically identifies, analyzes and controls the servo motors corresponding to each part, reducing the number of steps for passengers to actively input body dimensions and the number of steps for users to independently adjust seat dimensions. The seat adapts to the passenger's body shape and is more convenient to use.

[0106] Example 1

[0107] like Figure 7 When a passenger sits on the seat provided by the present invention for the first time, he or she adjusts the sitting posture to ensure that the body is in full contact with the seat. The system is powered on and automatically performs the following first adjustment mode steps in sequence:

[0108] 1) Ten pressure sensors record their respective pressure values and upload them to the pressure analysis module in the seat sensing control system.

[0109] 2) Through pressure algorithm A and pressure algorithm B, the passenger's body shape and corresponding comfortable static pressure distribution are identified.

[0110] 3) The seven seat support performance dimensions that achieve the target static pressure distribution are calculated through the mapping module between pressure distribution and comfortable seat dimensions, and the seven seat support performance target dimensions are sent to the motor control module.

[0111] 4) Recording the initial seat support performance dimensions and the adjusted new seat support performance dimensions through the motor control module, calculating the difference between the seven seat support performance target dimensions and the current dimensions, and determining the positive or negative adjustment amount for the seven seat support performance dimensions.

[0112] 5) Through the signal output function of the motor control module, the voltage signal is used to control the rotation of the corresponding servo motor, and the voltage information required to increase or decrease the performance dimensions of the seven seat supports is calculated and transmitted to the servo motor.

[0113] 6) The seven seat adjustment servo motors automatically adjust to the comfortable initial seat size that best matches the static pressure of the occupant based on the voltage signal.

[0114] Example 2

[0115] like Figure 8 The second adjustment mode is a timed adjustment of the seat as the ride time increases. When this mode is executed, the first adjustment mode has already been automatically adjusted, and the seat has been automatically adjusted to the initial size of the comfortable seat, so that the occupant maintains a relatively stable sitting posture. The specific implementation of this adjustment method is as follows:

[0116] 1) After the seat automatically adjusts to a comfortable initial size, the occupant maintains a relatively stable sitting posture. The pressure sensors begin to continuously obtain pressure values from each pressure sensor and upload the data to the pressure analysis module.

[0117] 2) The pressure analysis module uses pressure algorithm D to analyze the pressure values within 30 minutes. If there is no pressure value change of more than 20% and the frequency of change reaches more than 3 times in any consecutive 30 seconds, it is determined that the current sitting posture is not uncomfortable.

[0118] 3) If there is no discomfort in the current sitting posture for 30 consecutive minutes, the next pressure distribution target in the time series is started according to the pressure algorithm E.

[0119] 4) The pressure distribution and comfort seat size mapping module calculates the seven seat support performance dimensions that achieve the pressure distribution target, and sends the seven seat support performance target dimensions to the motor control module.

[0120] 5) The motor control module calculates the difference between the target dimensions of the seven seat support performances and the current dimensions, and determines the amount of adjustment in the positive or negative direction for the seven seat support performance dimensions.

[0121] 6) The signal output function of the motor control module calculates the voltage information required for the forward or reverse adjustment of the seven seat support performance dimensions, and transmits the voltage signals to the servo motors respectively.

[0122] 7) Seven servo motors automatically adjust to the seat size that meets the passenger's current seat pressure distribution requirements based on the voltage signal.

[0123] Example 3

[0124] like Figure 9 The third adjustment mode is to actively adjust the seat to accommodate local discomfort during riding. In this mode, the seat has been automatically adjusted to its initial size for comfort after the first adjustment mode. The specific implementation of this adjustment method includes the following steps:

[0125] 1) After the seat is automatically adjusted to a comfortable initial size, the passenger feels discomfort in a certain part of the body and produces local body movement. The pressure sensor records the pressure change data generated by the local body movement and uploads the data to the pressure analysis module.

[0126] 2) Based on pressure algorithm D, analyze whether there is a pressure value change of more than 20% and a frequency of more than 3 times in a certain pressure sensor within 30 seconds. If so, it is determined that the body part corresponding to the pressure sensor is uncomfortable.

[0127] 3) According to the pressure algorithm F1 or the pressure algorithm F2, the target pressure distribution of the uncomfortable human body part is obtained.

[0128] 4) The mapping module calculates the corresponding seat index and its size to achieve the target pressure value of a certain human body part, such as Figure 5 As shown, the corresponding seat index size is sent to the motor control module.

[0129] 5) The motor control module calculates the difference between the target seat size and the current seat size and determines the positive or negative adjustment amount of the seat size.

[0130] 6) Through the signal output function of the motor control module, the rotation of the servo motor is controlled by the voltage signal, the voltage information required for the forward or reverse adjustment of the target seat size is calculated, and the voltage signal is transmitted to the corresponding servo motor.

[0131] 7) The servo motor corresponding to the uncomfortable part of the body automatically adjusts to the target size based on the voltage signal to achieve the target pressure of the local part of the body.

[0132] 8) Within 2 minutes after the local pressure is adjusted, according to pressure algorithm D, if the pressure value of the local pressure sensor changes by more than 20% within 30 seconds again, and the frequency of change is more than 3 times, the human body part will be judged as uncomfortable again, and the adjustment will be invalid and need to be adjusted again. If there is no discomfort, it has been adjusted to a comfortable seat size.

[0133] 9) According to the pressure algorithm G, the target pressure for re-adjustment of the seat part is determined.

[0134] 10) The pressure distribution and comfortable seat size mapping module calculates the corresponding seat size to achieve the target pressure value of the human body part, and sends it to the motor control system for seat adjustment, and returns to step 8.

[0135] Example 4

[0136] like Figure 10 The fourth adjustment mode is to actively adjust the seat to avoid general discomfort during riding. When executing this mode, the seat has already been adjusted in the first adjustment mode and has automatically adjusted to its initial size for comfort. The specific implementation of this adjustment method includes the following steps:

[0137] 1) After the seat is automatically adjusted to a comfortable initial size, the occupant feels discomfort in multiple body parts and generates multiple body movements. The pressure sensor records the pressure change data generated by the multiple body movements and uploads the data to the pressure analysis module.

[0138] 2) Based on the pressure algorithm H, if yes, it is determined that the whole body is uncomfortable and all seat support performance and size adjustments need to be made.

[0139] 3) Screening the part of the human body with the largest pressure variation, and determining the target pressure distribution of the part with the largest pressure variation according to the pressure algorithm F1 or the pressure algorithm F2.

[0140] 4) The target pressure distribution at the location with the largest pressure variation is calculated through the mapping module, corresponding to the seat index and its size.

[0141] 5) Based on pressure algorithm I, calculate the remaining seat support performance dimensions and send the 7 seat support performance dimensions to the motor control module.

[0142] 6) The motor control module calculates the difference between the target dimensions of the seven seat support performances and the current dimensions, and determines the amount of adjustment in the positive or negative direction for the seven seat support performance dimensions.

[0143] 7) The motor control module calculates the voltage information required for the forward or reverse adjustment of the seven seat support performance dimensions through its signal output function, and transmits the voltage signals to the servo motors in each seat part.

[0144] 8) Seven servo motors automatically adjust to the seat size that meets the passenger's current seat pressure distribution requirements based on the voltage signal.

[0145] 9) Within 2 minutes after all 7 seat support performance dimensions are adjusted, according to pressure algorithm D, if any part of the pressure change is uncomfortable, it needs to be adjusted again. If there is no discomfort, the seat has been adjusted to a comfortable size.

[0146] 10) Screen the body part with the largest pressure change amplitude, and determine the target pressure value for re-adjustment of the seat part with the largest pressure change amplitude based on the pressure algorithm G.

[0147] 11) The pressure distribution and comfortable seat size mapping module calculates the corresponding seat size to achieve the target pressure value of the human body part, and sends it to the motor control system for seat adjustment. After the adjustment is completed, return to step 9).

[0148] The above embodiments are merely preferred embodiments of the present invention, and the scope of protection of the present invention is not limited to the above embodiments. All technical solutions that fall within the scope of protection of the present invention are within the scope of protection of the present invention. It should be noted that improvements and modifications that can be made by a person skilled in the art without departing from the principles of the present invention are also considered to be within the scope of protection of the present invention.

Claims

1. A method for actively adjusting the size of a seat, wherein the seat comprises an adjustable seat plate and a backrest, wherein the backrest is provided with an adjustable waist support and a neck support at the waist and neck, respectively, wherein: Also includes: A pressure sensing system for collecting real-time pressure values of a human body at different body positions on the seat, comprising a plurality of pressure sensors arranged on the seat surface at different body positions; A seat sensing control system for sensing, analyzing, and mapping pressure signals and controlling a motor to adjust seat dimensions; the seat sensing control system further includes a pressure analysis module, a mapping model, and the motor control module electrically connected in sequence, and the pressure sensor is electrically connected to the pressure analysis module; an adjustment system, configured to adjust the dimensions of different parts of the seat according to a motor control signal received from the motor control module, the adjustment system being electrically connected to the motor control module; Based on the seat, the method for actively adjusting its size includes the following steps: S1: receiving real-time pressure values and identifying seat surface pressure distribution characteristics, including the amplitude and frequency of pressure changes, through the pressure analysis module, determining a sitting posture mode and determining a comfortable pressure distribution target; S2: The comfortable pressure distribution target is converted into the comfortable seat size through the mapping model to obtain the comfortable seat size; the mapping model stores the comfortable pressure distribution target and the corresponding comfortable seat size according to the sitting posture mode classification S3: transmitting the comfortable seat size to the motor control module, the motor control module obtaining the current seat size, comparing the comfortable seat size with the current seat size, and calculating voltage signals corresponding to different parts of the seat that achieve the comfortable seat size; S4: The motor control module transmits voltage signals of different parts to the adjustment system, and the adjustment system adjusts the support performance size of the seat to a comfortable seat size; The sitting posture modes include initial seat support performance and size adjustment to provide comfort during the first ride, timed seat adjustment as the ride progresses, active seat adjustment to accommodate local body discomfort during the ride, and active seat adjustment to accommodate general body discomfort during the ride, which correspond to the first adjustment mode, the second adjustment mode, the third adjustment mode, and the fourth adjustment mode. The pressure analysis module determines whether the sitting posture mode is in the first, second, third, or fourth adjustment mode based on the pressure information collected by the pressure sensors at different locations. When the seat is powered on, it automatically enters the first adjustment mode; Every 30 seconds thereafter, the pressure analysis module uses the pressure algorithm D to determine whether local discomfort occurs. If so, the system enters the third adjustment mode. Every 2 minutes, the pressure analysis module uses the pressure algorithm H to determine whether systemic discomfort occurs. If so, the fourth adjustment mode is entered; Every 30 minutes, the pressure analysis module uses the pressure algorithm D to determine whether the whole body is comfortable within 30 minutes. If so, the second adjustment mode is entered; calculating comfortable pressure distribution targets respectively through the first, second, third and fourth adjustment modes, and adjusting the support performance size of the seat to a comfortable seat size according to the comfortable pressure distribution targets; The pressure algorithm D compares the pressure value of a certain pressure sensor within 30 seconds and the change amplitude is more than 20% and the change frequency is more than 3 times. It is determined that the pressure change part is uncomfortable, otherwise it is not uncomfortable. The pressure algorithm H compares the pressure values of multiple pressure sensors of the seat and determines systemic discomfort if the pressure value changes by more than 20% and the frequency of changes is more than 3 times within 2 minutes; and selects the part with the largest pressure change based on the pressure change amplitude of different parts; The active adjustment method when the pressure analysis module determines that the sitting posture mode is the first adjustment mode is to perform the following steps in sequence: Step S1-1: using the pressure algorithm A and the pressure algorithm B of the pressure analysis module, identifying the passenger's body shape and the corresponding comfortable static pressure distribution, wherein the comfortable pressure distribution target is the comfortable static pressure distribution; Steps S2, S3 and S4: the seat support performance size is adjusted to a comfortable seat size, and the first adjustment mode ends; The pressure algorithm A is a neural network model that predicts the body shape of the occupant using the pressure values collected by the multiple pressure sensors, and in which the body shape characteristics of the occupant are identified using the static pressure distribution in the sitting state; Pressure algorithm B is the comfortable static pressure distribution corresponding to different body shape characteristics. Different body shape parameters are input through pressure algorithm A to obtain the corresponding comfortable static pressure distribution; The active adjustment method when the pressure analysis module determines that the sitting posture mode is the second adjustment mode is to perform the following steps in sequence: Step S1-2: Using the pressure algorithm E of the pressure analysis module, the next pressure distribution target in the time series is activated to predict the comfortable pressure distribution of the occupant; Steps S2, S3 and S4: the seat support performance size is adjusted to a comfortable seat size, and the second adjustment mode ends; The pressure algorithm E is based on the preset comfortable chair pressure values for passengers of different body types in a time series with 30-minute nodes; The active adjustment method when the pressure analysis module determines that the sitting posture mode is the third adjustment mode is to perform the following steps in sequence: Step S1-3: Obtaining a comfortable pressure distribution target for the uncomfortable human body part through the pressure algorithm F of the pressure analysis module; Steps S2, S3, and S4; Step S5: Within 2 minutes after the local pressure is adjusted, the pressure analysis module's pressure algorithm D is used to determine whether the current sitting posture is uncomfortable. If so, the pressure analysis module's pressure algorithm G is used to predict the target pressure distribution for the local seat adjustment again, and the process returns to step S2. If not, the seat is adjusted to a comfortable seat size, and the third adjustment mode ends. wherein the pressure algorithm F selects the human body part with the largest pressure variation amplitude to obtain the target pressure distribution of the uncomfortable human body part, which is selected from the pressure algorithm F1 or the pressure algorithm F2; The pressure algorithm F1 identifies the amplitude of pressure value changes. When the amplitude of pressure value changes is between 20% and 40%, if the pressure value of the body part has been at the upper end of the comfortable pressure distribution range of the corresponding body part of the occupant over the past 30 minutes, that is, in the lower 50% of the comfortable pressure value interval percentage, then the body part is determined to be trending towards a low pressure value, that is, the current pressure interval percentage - 25%; if the pressure value of the body part has been at the lower end of the comfortable pressure distribution range of the corresponding body part of the occupant over the past 30 minutes, that is, in the upper 50% of the comfortable pressure interval percentage, then the body part is determined to be trending towards a high pressure value, that is, the current pressure interval percentage + 25%; The pressure algorithm F2 identifies the amplitude of pressure value changes. When the amplitude of pressure value change is greater than 40%, if the pressure value of the body part has been at the high end of the comfortable pressure distribution range of the corresponding body part of the occupant over the past 30 minutes, that is, in the bottom 50% of the comfortable pressure value interval percentage, then the body part is determined to be trending towards a low pressure value, that is, the current pressure value interval percentage -50%; if the pressure value of the body part has been at the low end of the comfortable pressure distribution range of the corresponding body part of the occupant over the past 30 minutes, that is, in the top 50% of the comfortable pressure value interval percentage, then the body part is determined to be trending towards a high pressure value, that is, the current pressure value interval percentage +50%; The pressure algorithm G: If the current body pressure distribution is at the upper value of the comfortable pressure distribution range, that is, the lower 25% of the comfortable pressure range, the pressure value of the body part is planned to be reduced by 25% every 2 minutes until it cannot be reduced by another 25%. The pressure value is then increased to 100% of the comfortable pressure range and then reduced by 25% until it reaches 1% of the comfortable pressure range. The active adjustment method when the pressure analysis module determines that the sitting posture mode is the fourth adjustment mode is to perform the following steps in sequence: Step S1-4: Analyze the location with the largest pressure variation, and obtain a target pressure distribution for the location with the largest pressure variation using the pressure algorithm F of the pressure analysis module. The target comfortable pressure distribution is the target pressure distribution for the location with the largest pressure variation. Step S2; Step S2-1: Based on the comfortable seat size of the part with the largest pressure variation, the seat size of other parts is obtained by using the pressure algorithm I of the pressure analysis module; Steps S3 and S4; S6: Within 2 minutes after the seat support performance size is adjusted, the pressure analysis module uses the pressure algorithm D to determine whether the current sitting posture is uncomfortable. If so, S7 is executed; if not, the seat support size is adjusted to the final comfortable seat size, and the fourth adjustment mode ends. S7: Determine the target pressure distribution for re-adjustment of the seat portion with the largest pressure change amplitude using the pressure algorithm G of the pressure analysis module, execute steps S2, S3, and S4 in sequence, and return to S6; The pressure algorithm I includes a correlation function of the support performance dimensions of the plurality of seats, and the support performance dimensions of the remaining seats are obtained by using the correlation function according to the comfortable seat dimension at the location with the largest pressure variation. The pressure algorithm G: If the current body pressure distribution is at the high value of the comfortable pressure distribution range, that is, the bottom 25% of the comfortable pressure value range, then the pressure value of the body part is planned to be reduced by 25% of the percentage every 2 minutes until it cannot be reduced by 25% again. The pressure value is increased to 100% of the comfortable pressure range percentage and then reduced by 25% of the percentage until it reaches 1% of the percentage.

2. The active seat size adjustment method according to claim 1, characterized in that: The pressure sensors are respectively and symmetrically arranged on the neck, shoulder blade back, waist, ischial tuberosity and thigh root of the seat.

3. The active seat size adjustment method according to claim 1, characterized in that: The adjustment system can adjust the supporting performance dimensions of multiple seats, and includes a seat height adjustment system, a seat plate inclination adjustment system, a backrest inclination adjustment system, a lumbar support thickness adjustment system, a lumbar support height adjustment system, a neck support thickness adjustment system and a neck support height adjustment system, which respectively adjust the seat height, seat plate inclination, backrest inclination, lumbar support thickness, lumbar support height, neck support thickness and neck support height.

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