Vehicle seat backrest adjustment method and electronic device

Abstract

The application discloses a vehicle seat backrest adjusting method and an electronic device. The vehicle seat backrest adjusting method comprises the following steps: acquiring a plurality of pressure values of a pressure sensor array on a seat backrest of a vehicle, the pressure sensor array comprising a plurality of pressure sensors arranged along the height direction of the seat backrest; establishing a spine curve equation based on the deformation amount corresponding to the pressure values and the positions of the pressure sensors; determining a to-be-adjusted supporting structure of a passenger's back part based on the spine curve equation, and controlling the to-be-adjusted supporting structure to act. According to the pressure values of the passenger on the seat backrest, the spine curve equation conforming to the passenger's back curve is determined, and based on the spine curve equation, the to-be-adjusted supporting structure is determined and controlled to act, so that the actuating position can be adaptively adjusted according to the passenger's back curve, thereby realizing individualized and accurate back support.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of vehicles, and particularly relates to a vehicle seat backrest adjusting method, an electronic device, a storage medium and a computer program product. BACKGROUND

[0002] The existing vehicle seat mostly adopts a fixed structure or a simple manual adjusting mode for supporting the occupant, and cannot accurately match the curve of the human back and the body shape of different passengers, resulting in poor riding comfort. Especially for users who drive or ride for a long time, fatigue and discomfort are easily caused due to the lack of suitable back support. Therefore, how to design a seat system capable of automatically adjusting the support position according to the curve of the human back becomes a technical problem to be solved. SUMMARY

[0003] Therefore, it is necessary to provide a vehicle seat backrest adjusting method, an electronic device, a storage medium and a computer program product in view of the technical problem that the seat backrest of the prior art cannot be automatically adjusted according to the curve of the human back.

[0004] The present application provides a vehicle seat backrest adjusting method, comprising:

[0005] obtaining a plurality of pressure values of a pressure sensor array on a seat backrest of a vehicle, the pressure sensor array comprising a plurality of pressure sensors arranged along the height direction of the seat backrest;

[0006] establishing a spine curve equation based on the deformation amount corresponding to the pressure value and the position of the pressure sensor;

[0007] determining a to-be-adjusted support structure of the back part of the occupant based on the spine curve equation, and controlling the to-be-adjusted support structure to act.

[0008] Further, the establishing of the spine curve equation based on the deformation amount corresponding to the pressure value and the position of the pressure sensor comprises:

[0009] determining an upper departure point pressure sensor and a lower departure point pressure sensor from the pressure sensors, wherein starting from the middle pressure sensor, the pressure sensors are searched in the upward direction in sequence, the pressure value of the upper departure point pressure sensor is less than a pressure threshold value, and the pressure value of the next pressure sensor of the upper departure point pressure sensor is zero; starting from the middle pressure sensor, the pressure sensors are searched in the downward direction in sequence, the pressure value of the lower departure point pressure sensor is less than the pressure threshold value, and the pressure value of the next pressure sensor of the lower departure point pressure sensor is zero;

[0010] A two-dimensional coordinate system is established with the upper or lower take-off point pressure sensor as the coordinate origin, a first dimension coordinate of the two-dimensional coordinate system is a relative distance between the pressure sensor and the coordinate origin, and a second dimension coordinate of the two-dimensional coordinate system is a deformation amount corresponding to a pressure value of the pressure sensor;

[0011] The upper take-off point pressure sensor, the lower take-off point pressure sensor, and a pressure sensor between the upper take-off point pressure sensor and the lower take-off point pressure sensor are taken as a to-be-measured sensor, a coordinate value of the to-be-measured sensor is determined, and a spine curve equation is established based on the coordinate value of the to-be-measured sensor.

[0012] Further, the spine curve equation is a cubic spline curve equation.

[0013] Still further, the establishment of the spine curve equation based on the coordinate value of the to-be-measured sensor comprises:

[0014] The cubic spline curve equation is constructed as:

[0015] x(t)=at 3 +bt 2 +ct+d

[0016] y(t)=et 3 +ft 2 +gt+h

[0017] wherein x is the first dimension coordinate, y is the second dimension coordinate, t is an auxiliary parameter, a is a first fitting parameter, b is a second fitting parameter, c is a third fitting parameter, d is a fourth fitting parameter, e is a fifth fitting parameter, f is a sixth fitting parameter, g is a seventh fitting parameter, and h is an eighth fitting parameter;

[0018] The coordinate value of the to-be-measured sensor and the corresponding auxiliary parameter are substituted into the cubic spline curve equation respectively, and the first fitting parameter, the second fitting parameter, the third fitting parameter, the fourth fitting parameter, the fifth fitting parameter, and the sixth fitting parameter are solved.

[0019] The solved first fitting parameter, the second fitting parameter, the third fitting parameter, the fourth fitting parameter, the fifth fitting parameter, and the sixth fitting parameter are substituted into the cubic spline curve equation, and a spine curve equation is obtained.

[0020] Still further, the determination of the to-be-adjusted support structure of the passenger back part based on the spine curve equation and the control of the to-be-adjusted support structure comprise:

[0021] A lumbar sensor of a lumbar position of the passenger and / or a thoracic sensor of a thoracic position of the passenger are determined based on the spine curve equation.

[0022] The support structure at the position of the lumbar vertebra sensor is taken as a support structure to be adjusted, and the support structure to be adjusted is controlled to act according to the pressure value of the lumbar vertebra sensor; and / or

[0023] The support structure at the position of the thoracic vertebra sensor is taken as a support structure to be adjusted, and the support structure to be adjusted is controlled to act according to the pressure value of the thoracic vertebra sensor.

[0024] Further, the lumbar vertebra sensor at the position of the lumbar vertebra of the passenger and / or the thoracic vertebra sensor at the position of the thoracic vertebra of the passenger are determined based on the spine curve equation, comprising:

[0025] The length of the curve between the upper take-off point pressure sensor and the lower take-off point pressure sensor is calculated based on the spine curve equation;

[0026] The length of the lumbar vertebra is calculated according to the first proportional coefficient of the lumbar vertebra and the spine, the coordinate value conforming to the length of the lumbar vertebra in the spine curve equation is solved as the lumbar vertebra coordinate value, and the pressure sensor closest to the lumbar vertebra coordinate value is calculated as the lumbar vertebra sensor; and / or

[0027] The length of the thoracic vertebra is calculated according to the second proportional coefficient of the thoracic vertebra and the spine, the coordinate value conforming to the length of the thoracic vertebra in the spine curve equation is solved as the thoracic vertebra coordinate value, and the pressure sensor closest to the thoracic vertebra coordinate value is calculated as the thoracic vertebra sensor.

[0028] Further, the lumbar vertebra sensor at the position of the lumbar vertebra of the passenger and / or the thoracic vertebra sensor at the position of the thoracic vertebra of the passenger are determined based on the spine curve equation, comprising:

[0029] The coordinate value conforming to the curvature of the lumbar vertebra in the spine curve equation is solved as the lumbar vertebra coordinate value, and the pressure sensor closest to the lumbar vertebra coordinate value is calculated as the lumbar vertebra sensor; and / or

[0030] The coordinate value conforming to the curvature of the thoracic vertebra in the spine curve equation is solved as the thoracic vertebra coordinate value, and the pressure sensor closest to the thoracic vertebra coordinate value is calculated as the thoracic vertebra sensor.

[0031] Further:

[0032] The control of the support structure to be adjusted to act according to the pressure value of the lumbar vertebra sensor comprises:

[0033] When the pressure value of the lumbar vertebra sensor changes from small to large, if the pressure value of the lumbar vertebra sensor is greater than the first pressure threshold, a first instruction to reduce the stroke of the support structure to be adjusted is output;

[0034] If the pressure value of the lumbar vertebra sensor decreases from large to small, and if the pressure value of the lumbar vertebra sensor is less than a fourth pressure threshold, a fourth instruction for increasing the stroke of the support structure to be adjusted is outputted.

[0035] The control of the actuation of the support structure to be adjusted according to the pressure value of the thoracic vertebra sensor comprises:

[0036] If the pressure value of the thoracic vertebra sensor increases from small to large, and if the pressure value of the thoracic vertebra sensor is greater than a third pressure threshold, a third instruction for decreasing the stroke of the support structure to be adjusted is outputted.

[0037] If the pressure value of the thoracic vertebra sensor decreases from large to small, and if the pressure value of the thoracic vertebra sensor is less than a fourth pressure threshold, a fourth instruction for increasing the stroke of the support structure to be adjusted is outputted.

[0038] Further, the determination of the support structure to be adjusted for the back part of the occupant based on the spine curve equation comprises:

[0039] The support structure to be adjusted is controlled by taking the support structure at the position of the cervical vertebra sensor as the support structure to be adjusted.

[0040] Further, the seat backrest further comprises a foam, a massage unit and a support structure, the pressure sensor array is fixed to the first surface of the foam, the massage unit is fixed to the first surface of the foam and is located in the same plane as the pressure sensor array, and the support structure is fixed to the second surface of the foam.

[0041] Further, the pressure sensor array comprises, from top to bottom, a first substrate layer, a sensor layer, a second substrate layer and a reinforcing sheet layer, the sensor layer comprises a plurality of pressure sensors arranged at intervals, and an insulating layer is filled between adjacent two pressure sensors, each pressure sensor comprises, from top to bottom, an upper electrode, a pressure-sensitive layer and a lower electrode, and the reinforcing sheet layer comprises a plurality of reinforcing sheets arranged at intervals, each reinforcing sheet is opposite to the lower part of a pressure sensor, and the cross-sectional area of the reinforcing sheet is greater than the cross-sectional area of the pressure sensor.

[0042] The present application provides an electronic device comprising:

[0043] at least one processor; and,

[0044] a memory connected in communication with the at least one processor; wherein,

[0045] The memory stores instructions executable by the at least one processor, and the instructions are executed by the at least one processor to enable the at least one processor to perform the vehicle seat backrest adjustment method as described above.

[0046] The present application provides a storage medium storing computer instructions for performing all steps of the vehicle seat backrest adjustment method as described above when the computer executes the computer instructions.

[0047] The present application provides a computer program product comprising computer program / instructions for implementing the vehicle seat backrest adjustment method as described above when executed by a processor.

[0048] The present application determines the spine curve equation conforming to the passenger's back curve according to the pressure value of the passenger on the seat backrest, and determines and controls the actuation of the support structure to be adjusted based on the spine curve equation, so that the actuation position can be adaptively adjusted according to the passenger's back curve, thereby realizing personalized and precise back support. BRIEF DESCRIPTION OF DRAWINGS

[0049] Figure 1 A work flow chart of a vehicle seat backrest adjustment method according to an embodiment of the present application;

[0050] Figure 2 A work flow chart of a vehicle seat backrest adjustment method according to another embodiment of the present application;

[0051] Figure 3 A schematic diagram of an array of pressure sensors on a backrest;

[0052] Figure 4 A schematic diagram of a human backrest pressure according to an example of the present application;

[0053] Figure 5 A schematic diagram of a lumbar pressure distribution curve D;

[0054] Figure 6 An exploded view of a seat backrest according to an example of the present application;

[0055] Figure 7 A schematic diagram of a pressure sensor array according to an embodiment of the present application;

[0056] Figure 8 A-A sectional view of Figure 7 ;

[0057] Figure 9 A work flow chart of a vehicle seat backrest adjustment method according to a preferred embodiment of the present application;

[0058] Figure 10 A schematic diagram of a hardware structure of an electronic device according to the present application.

[0059] Labeling instructions

[0060] 1, pressure sensor array; 11, first substrate layer; 12, sensor layer; 121, pressure sensor; 1211, upper electrode; 1212, pressure sensitive layer; 1213, lower electrode; 122, insulating layer; 13, second substrate layer; 14, reinforcement sheet layer; 141, reinforcement sheet; 2, foam; 3, massage unit; 4, support structure; 5, heating pad; 6, slab; 7, ventilation air bag; 8, skeleton; 10, seat backrest. DETAILED DESCRIPTION

[0061] The specific embodiments of the present application will be further described below with reference to the accompanying drawings. The same parts are denoted by the same reference numerals in the drawings. It should be noted that the words "front", "rear", "left", "right", "upper" and "lower" used in the following description refer to the directions in the drawings, and the words "inner" and "outer" refer to the directions towards or away from the geometric center of a particular part.

[0062] As Figure 1 shown is a work flow chart of a vehicle seat backrest adjustment method according to an embodiment of the present application, comprising:

[0063] Step S101, obtaining a plurality of pressure values of a pressure sensor array on a seat backrest of a vehicle, the pressure sensor array comprising a plurality of pressure sensors arranged along the height direction of the seat backrest;

[0064] Step S102, establishing a spine curve equation based on the deformation amount corresponding to the pressure value and the position of the pressure sensor;

[0065] Step S103, determining the to-be-adjusted support structure of the passenger's back part based on the spine curve equation, and controlling the to-be-adjusted support structure to act.

[0066] Specifically, the present application can be applied to electronic devices with processing capabilities, such as controllers of vehicles. For example, Electronic Control Unit (ECU) of vehicles.

[0067] First, step S101 is performed to obtain a plurality of pressure values of a pressure sensor array on a seat backrest of a vehicle, the pressure sensor array comprising a plurality of pressure sensors arranged along the height direction of the seat backrest.

[0068] As Figure 3 shown, a pressure sensor array 1 is provided on the seat backrest 10, which comprises a plurality of pressure sensors 121 arranged along the height direction of the seat backrest 10. Figure 3Each red dot is a pressure sensor 121. Each pressure sensor 121 outputs a detected pressure value. The height direction of the seat back is the direction of extension from the bottom of the seat back to the top of the seat back.

[0069] The arrangement position of the pressure sensor covers the main support area of the human back, including the key parts such as the waist and the shoulder.

[0070] In some embodiments, the pressure sensors 121 are arranged in one or more columns along the spine line extending in the height direction of the seat back 1, or arranged in one or more columns parallel to the spine line extending in the height direction of the seat back 1.

[0071] Preferably, the spine line of the seat back is the center line in the height direction of the seat back.

[0072] In the case of being arranged in multiple columns, each column of pressure sensors forms a pressure sensor array, and the vehicle seat back adjustment method of the present application is independently performed for each column of pressure sensor arrays.

[0073] Then, step S102 is performed to establish a spine curve equation based on the deformation amount corresponding to the pressure value and the position of the pressure sensor.

[0074] Specifically, the unit pressure value and the corresponding unit deformation amount can be determined through calibration. Then, after detecting the pressure value, the pressure value is divided by the unit pressure value, and then multiplied by the unit deformation amount to obtain the deformation amount corresponding to the pressure value. Alternatively, multiple pressure values and corresponding deformation amounts can be calibrated, and then a table lookup method can be used to determine the deformation amount corresponding to the detected pressure value.

[0075] Then, based on the deformation amount and the position of the pressure sensor, a spine curve equation of the deformation amount and the position relationship is established.

[0076] Finally, step S103 is performed to determine the to-be-adjusted support structure of the passenger's back part based on the spine curve equation, and control the to-be-adjusted support structure to act.

[0077] The spine curve equation is based on the pressure generated by the passenger's back at different positions on the seat back, so the spine curve equation will reflect the passenger's back curve.

[0078] Therefore, according to the spine curve equation, the position of the passenger's back part on the seat back is determined, and the support structure of the position of the passenger's back part on the seat back is determined as the to-be-adjusted support structure.

[0079] The passenger's back part includes but is not limited to lumbar vertebrae, thoracic vertebrae, and cervical vertebrae. By calculating the positions of the lumbar vertebrae, the thoracic vertebrae, and the cervical vertebrae on the seat back, the positions of the waist, the shoulder, and the neck are obtained, and the required support for the passenger's waist, shoulder, and neck positions is achieved.

[0080] The support structure includes, but is not limited to, a mechanical support structure or a pneumatic support structure. The mechanical support structure can be a motor-driven support structure. The pneumatic support structure can be a gas bag inflated or deflated by a gas pump.

[0081] In some embodiments, a support structure is arranged behind each pressure sensor. The support structure behind each pressure sensor is the support structure corresponding to the pressure sensor. Where the front direction of the vehicle is the rear direction, the opposite direction is the rear direction.

[0082] According to the pressure value of the occupant on the seat backrest, the present application determines the spine curve equation conforming to the occupant's back curve, and determines and controls the adjustment of the to-be-adjusted support structure based on the spine curve equation, so that the adjustment position can be adaptively adjusted according to the occupant's back curve, thereby realizing personalized and accurate back support.

[0083] As shown in Figure 2 The working flow chart of a vehicle seat backrest adjustment method in another embodiment of the present application is shown in the figure, which includes:

[0084] Step S201, obtaining a plurality of pressure values of a pressure sensor array on the seat backrest of the vehicle, the pressure sensor array including a plurality of pressure sensors arranged along the height direction of the seat backrest;

[0085] Step S202, determining an upper off-point pressure sensor and a lower off-point pressure sensor from the pressure sensors, wherein starting from the middle pressure sensor, sequentially searching in the upward direction, the pressure value of the upper off-point pressure sensor is less than the pressure threshold value, and the pressure value of the next pressure sensor of the upper off-point pressure sensor is zero; starting from the middle pressure sensor, sequentially searching in the downward direction, the pressure value of the lower off-point pressure sensor is less than the pressure threshold value, and the pressure value of the next pressure sensor of the lower off-point pressure sensor is zero;

[0086] Step S203, establishing a two-dimensional coordinate system with the upper off-point pressure sensor or the lower off-point pressure sensor as the coordinate origin, the first dimension coordinate of the two-dimensional coordinate system being the relative distance between the pressure sensor and the coordinate origin, and the second dimension coordinate of the two-dimensional coordinate system being the deformation amount corresponding to the pressure value of the pressure sensor;

[0087] Step S204, taking the upper off-point pressure sensor, the lower off-point pressure sensor, and the pressure sensors between the upper off-point pressure sensor and the lower off-point pressure sensor as to-be-measured sensors, determining the coordinate values of the to-be-measured sensors, and establishing a spine curve equation based on the coordinate values of the to-be-measured sensors;

[0088] Step S205, determining the lumbar sensor at the lumbar position of the passenger and / or the thoracic sensor at the thoracic position of the passenger based on the spine curve equation;

[0089] Step S206, taking the support structure at the position of the lumbar sensor as the support structure to be adjusted, and controlling the support structure to be adjusted to act according to the pressure value of the lumbar sensor; and / or

[0090] Step S207, taking the support structure at the position of the thoracic sensor as the support structure to be adjusted, and controlling the support structure to be adjusted to act according to the pressure value of the thoracic sensor;

[0091] Step S208, taking the pressure sensors above the upper departure point pressure sensor as the cervical sensor, and controlling the support structure at the position of the cervical sensor to act as the support structure to be adjusted.

[0092] Specifically, first, step S201 is performed to obtain a plurality of pressure values of a pressure sensor array on the seat back of the vehicle, the pressure sensor array comprising a plurality of pressure sensors arranged along the height direction of the seat back.

[0093] Specifically, a plurality of pressure sensors are arranged on the spine line of the seat back 10 to form a pressure sensor array. The arrangement position of the pressure sensors covers the main support area of the human back, including the key parts such as the waist and the shoulder.

[0094] Then, according to the distribution of the pressure values, the height and the inclination angle of the human back are determined. Specifically, the distance of the seat surface between the upper and lower departure points is taken as the height of the human back, and the pressure data of the sensing points between the upper and lower departure points can feedback the shape line of the human spine. The pressure distribution data of the human back is read in real time by the sensor array.

[0095] Specifically, step S202 is performed to determine the upper departure point pressure sensor and the lower departure point pressure sensor from the pressure sensors, wherein, starting from the middle pressure sensor, the pressure sensor is searched in the upward direction, the pressure value of the upper departure point pressure sensor is less than the pressure threshold value, and the pressure value of the next pressure sensor of the upper departure point pressure sensor is zero; starting from the middle pressure sensor, the pressure sensor is searched in the downward direction, the pressure value of the lower departure point pressure sensor is less than the pressure threshold value, and the pressure value of the next pressure sensor of the lower departure point pressure sensor is zero.

[0096] As Figure 4As shown, when a person 41 sits in the seat, their back contacts the backrest, applying pressure, which forms a pressure distribution curve. Due to the characteristics of the human back curve, there is an upper departure point Bn located in the shoulder area A0. Above the upper departure point Bn, the back does not contact the backrest, so the pressure sensor above the upper departure point Bn cannot detect a pressure value. Conversely, there is a lower departure point B0 located in the lumbar area D0. Below the lower departure point B0, the back does not contact the backrest, so the pressure sensor below the lower departure point B0 cannot detect a pressure value.

[0097] Therefore, the pressure values ​​of the pressure sensor from bottom to top are [P0, ..., P... n ], where P0 is the initial pressure value of the pressure sensor, and Pn is the final pressure value of the pressure sensor. Between P0 and Pn... n / 2 Between the corresponding sensors, and P n / 2 ~P n For each corresponding sensor, the lower departure point sensor and upper departure point sensor are identified where the pressure value is less than the pressure threshold and the pressure value of the next pressure sensor is 0. The pressure value of the upper departure point sensor is Pi, and its position corresponds to the lower departure point B0. The pressure value of the upper departure point sensor is Pj, and its position corresponds to the upper departure point Bn. The lower departure point is searched between the initial pressure sensor and the intermediate pressure sensor. When searching for the lower departure point, the next pressure sensor after a given pressure sensor is the pressure sensor immediately adjacent to and below it. Specifically, starting from the intermediate pressure sensor, the search proceeds sequentially towards the initial pressure sensor. If the pressure value of a given pressure sensor is less than the pressure threshold and the pressure value of the next pressure sensor is 0, then that pressure sensor is the lower departure point pressure sensor. The upper departure point is searched between the intermediate pressure sensor and the upper termination pressure sensor. When searching for the upper departure point, the next pressure sensor after a given pressure sensor is the pressure sensor immediately adjacent to and above it. Specifically, starting from the middle pressure sensor, the search proceeds sequentially upwards towards the terminal pressure sensor. If the pressure value of a certain pressure sensor is less than the pressure threshold, and the pressure value of the next pressure sensor is 0, then that pressure sensor is the upper departure point pressure sensor. The curve length between the lower departure point B0 and the upper departure point Bn represents the human body contact length L.

[0098] Then, step S203 is executed, establishing a two-dimensional coordinate system with the upper departure point pressure sensor or the lower departure point pressure sensor as the origin. The first dimension of the two-dimensional coordinate system is the relative distance between the pressure sensor and the origin, and the second dimension of the two-dimensional coordinate system is the deformation corresponding to the pressure value of the pressure sensor.

[0099] Specifically, a two-dimensional coordinate system (SCS, Spinal Coordinate System) is established based on the location of the pressure value cutoff point (between the upper and lower departure points). This two-dimensional coordinate system can reflect the curvature characteristics of the human back and provide a reference for subsequent support position calculations.

[0100] Specifically, a two-dimensional coordinate system is established with the upper or lower departure point pressure sensor as the origin, for example, a two-dimensional coordinate system including an x-axis and a y-axis. The first dimension of this two-dimensional coordinate system, such as the x-axis coordinate, is the relative distance between the pressure sensor and the origin, and the second dimension of the two-dimensional coordinate system, such as the y-axis coordinate, is the deformation corresponding to the pressure value of the pressure sensor.

[0101] like Figure 5 The diagram shows a pressure distribution curve D in the lumbar region, where the horizontal axis represents distance and the vertical axis represents pressure value. It can be seen that the pressure distribution curve is related to both distance and pressure value. Therefore, converting the pressure value into the corresponding deformation will yield the equation for the spinal curve, which reflects the curvature characteristics of the human back.

[0102] Therefore, step S204 is executed, which takes the upper departure point pressure sensor, the lower departure point pressure sensor, and the pressure sensor between the upper departure point pressure sensor and the lower departure point pressure sensor as the sensor to be tested, determines the coordinate value of the sensor to be tested, and establishes the spine curve equation based on the coordinate value of the sensor to be tested.

[0103] Specifically, it is suitable for describing the natural curvature of the human back, especially the double S-shape of thoracic kyphosis and lumbar lordosis. By segmenting and fitting different areas, such as the neck, chest, and waist, it can precisely control the curvature changes.

[0104] In one embodiment, the spine curve equation is a cubic spline curve equation.

[0105] Specifically, research has found that cubic spline curves best match the equation of the spinal curve and are suitable for describing the natural curvature of the human back, especially the double S-shape of thoracic kyphosis and lumbar lordosis.

[0106] In one embodiment, establishing the spine curve equation based on the coordinate values ​​of the sensor under test includes:

[0107] The equation of the cubic spline curve is constructed as follows:

[0108] x(t) = at 3 +bt 2 +ct+d

[0109] y(t)=et3 +ft 2 +gt+h

[0110] wherein x is a first dimension coordinate, y is a second dimension coordinate, t is an auxiliary parameter, a is a first fitting parameter, b is a second fitting parameter, c is a third fitting parameter, d is a fourth fitting parameter, e is a fifth fitting parameter, f is a sixth fitting parameter, g is a seventh fitting parameter, and h is an eighth fitting parameter;

[0111] substituting the coordinate values of the to-be-tested sensor and the corresponding auxiliary parameters into the cubic spline curve equation respectively to solve the first fitting parameter, the second fitting parameter, the third fitting parameter, the fourth fitting parameter, the fifth fitting parameter, and the sixth fitting parameter;

[0112] substituting the first fitting parameter, the second fitting parameter, the third fitting parameter, the fourth fitting parameter, the fifth fitting parameter, and the sixth fitting parameter solved into the cubic spline curve equation to obtain a spine curve equation.

[0113] Specifically, the human back curve equation is expressed by parameterization of a cubic spline curve, and is described as follows:

[0114] The following departure point B0 is taken as the starting point to establish a coordinate system (SCS), and the following departure point B0 to the upper departure point Bn is taken as a curve, and an auxiliary parameter t [0, 1] is introduced to describe the coordinates (x, y) of each point on the curve, wherein x is a first dimension coordinate, y is a second dimension coordinate, for example, x is the relative distance of the pressure sensor to the coordinate origin, and y is the deformation amount corresponding to the pressure value of the pressure sensor.

[0115] wherein: x(t)=at 3 +bt 2 +ct+d

[0116] y(t)=et 3 +ft 2 +gt+h

[0117] x is a first dimension coordinate, y is a second dimension coordinate, t is an auxiliary parameter, a is a first fitting parameter, b is a second fitting parameter, c is a third fitting parameter, d is a fourth fitting parameter, e is a fifth fitting parameter, f is a sixth fitting parameter, g is a seventh fitting parameter, and h is an eighth fitting parameter.

[0118] t is an auxiliary parameter corresponding to the coordinate value, the range of t is [0, 1], representing the overall range of the spline curve, t=0 is the starting point of the curve, and t=1 is the end point of the curve. More specifically, the following departure point B0 corresponds to t=0, and the upper departure point Bn corresponds to t=1.

[0119] In some embodiments, the auxiliary parameter t corresponds to the position of the sensor, the pressure sensor array comprises a plurality of pressure sensors arranged uniformly along the height direction of the seat back, then:

[0120] t = (i-1) / (n-1), where n is the number of sensors to be measured, i.e. the total number of the upper off point pressure sensor, the lower off point pressure sensor, and the pressure sensor between the upper off point pressure sensor and the lower off point pressure sensor, i is the serial number of the sensor to be measured, the lower off point pressure sensor is taken as the starting point of the sensor to be measured, the lower off point pressure sensor is taken as the end point of the sensor to be measured, and the serial number of the lower off point pressure sensor is 1.

[0121] For example, if the sensor to be measured includes 6 uniformly distributed sensors, the first pressure sensor, i.e. the lower off point pressure sensor, corresponds to t = 0, the second pressure sensor corresponds to t = 1 / 5, the third sensor corresponds to t = 2 / 5, and so on.

[0122] The first dimension coordinate value, the second dimension coordinate value and the corresponding auxiliary parameter of the plurality of sensors to be measured are substituted into the above two equations respectively, the fitting parameters a-h are solved by fitting, and the fitting parameters a-h are substituted into the cubic spline curve equation to obtain the spine curve equation.

[0123] Then steps S205-S209 are executed, and the position of the human waist, the position of the shoulder and the position of the neck are calculated based on the spine line coordinate system through the coordinate position of the pressure sensor. According to the calculation result, the position of the waist support, the shoulder and the neck support structure of the seat back of the seat is adjusted to ensure that the support force is uniformly distributed and meets the ergonomic requirements.

[0124] The system can update the support position in real time according to the dynamic changes of the passenger (such as sitting posture adjustment), and adjust the support of each part in real time according to the real-time monitored back curve to ensure the riding comfort.

[0125] Specifically, step S205 is executed, and the lumbar sensor of the passenger lumbar position and / or the thoracic sensor of the passenger thoracic position are determined based on the spine curve equation.

[0126] In one embodiment, the determination of the lumbar sensor of the passenger lumbar position and / or the thoracic sensor of the passenger thoracic position based on the spine curve equation comprises:

[0127] The length of the curve between the upper off point pressure sensor and the lower off point pressure sensor is calculated based on the spine curve equation.

[0128] According to a first proportional coefficient of the lumbar vertebrae and the spine, a length of the lumbar vertebrae is calculated, and a coordinate value in the spine curve equation that matches the length of the lumbar vertebrae is solved as a lumbar vertebrae coordinate value, and a pressure sensor closest to the lumbar vertebrae coordinate value is calculated as a lumbar vertebrae sensor; and / or

[0129] According to a second proportional coefficient of the thoracic vertebrae and the spine, a length of the thoracic vertebrae is calculated, and a coordinate value in the spine curve equation that matches the length of the thoracic vertebrae is solved as a thoracic vertebrae coordinate value, and a pressure sensor closest to the thoracic vertebrae coordinate value is calculated as a thoracic vertebrae sensor.

[0130] Specifically, using an arc length integral formula, the arc length S of any segment between Bn and B0 can be calculated, and the parameter t interval is [0, 1]:

[0131]

[0132] Therefore, taking t = 1, the overall arc length of Bn to B0 is calculated. By calibration, a first proportional coefficient C1 / of the arc length between the lumbar vertebrae point and B0 to the overall arc length is obtained, and / or by calibration, a second proportional coefficient C2 of the arc length between the thoracic vertebrae point and B0 to the overall arc length is obtained, the length of the lumbar vertebrae is calculated as C1 x S1, and / or the length of the thoracic vertebrae is calculated as C2 x S1.

[0133] Then using the arc length integral formula, the value of the auxiliary parameter t when S = C1 x S1 is solved, and the value is substituted into the spine curve equation to obtain the coordinate value (Xm1, Ym1) of the position corresponding to the lumbar vertebrae point. Using the arc length integral formula, the value of the auxiliary parameter t when S = C2 x S1 is solved, and the value is substituted into the spine curve equation to obtain the coordinate value (Xm2, Ym2) of the position corresponding to the thoracic vertebrae point.

[0134] In some embodiments, further comprising:

[0135] Obtaining a backrest angle;

[0136] Determining a first proportional coefficient and a second proportional coefficient corresponding to the backrest angle.

[0137] Specifically, as shown in Figure 4 the backrest angle is 25°, which can correspond to a set of initial first proportional coefficients and second proportional coefficients. However, under different backrest angles, the initial length of the backrest curve of the human body and the proportional relationship of each segment are different. Therefore, the first proportional coefficients and the second proportional coefficients corresponding to different backrest angles are calibrated in advance. Then when the backrest angle changes, the first proportional coefficient and the second proportional coefficient corresponding to the backrest angle are determined after the backrest angle is obtained by, for example, an angle sensor.

[0138] Then, the error value E=(X-Xm1)+(Y-Ym1) between the coordinate values (X, Y) of all pressure sensors from Bn to B0 and the coordinate values (Xm1, Ym1) of the lumbar point is calculated, and the pressure sensor corresponding to the minimum error value is selected as the lumbar sensor. The error value E=(X-Xm2)+(Y-Ym2) between the coordinate values (X, Y) of all pressure sensors from Bn to B0 and the coordinate values (Xm2, Ym2) of the thoracic point is calculated, and the pressure sensor corresponding to the minimum error value is selected as the thoracic sensor. 2 2 2 2

[0139] The embodiment determines the lumbar sensor and / or the thoracic sensor based on the lumbar ratio and / or the thoracic ratio, and the calculation is convenient and fast.

[0140] In one embodiment, the determining the lumbar sensor at the lumbar position of the occupant and / or the thoracic sensor at the thoracic position of the occupant based on the spine curve equation comprises:

[0141] solving the coordinate value conforming to the lumbar curvature in the spine curve equation as the lumbar coordinate value, and calculating the pressure sensor closest to the lumbar coordinate value as the lumbar sensor; and / or

[0142] solving the coordinate value conforming to the thoracic curvature in the spine curve equation as the thoracic coordinate value, and calculating the pressure sensor closest to the thoracic coordinate value as the thoracic sensor.

[0143] Specifically, the lumbar position and / or the thoracic position have fixed lumbar curvature and / or thoracic curvature. The coordinate is defined based on the spine curve equation, so the spine curve equation can be converted into a curvature equation.

[0144] In some embodiments, the curvature equation is:

[0145] wherein x is the first dimension coordinate, y is the second dimension coordinate, t is the auxiliary parameter, k is the curvature corresponding to the auxiliary parameter t, x'(t) is the first derivative of x with respect to t, x''(t) is the second derivative of x with respect to t, y'(t) is the first derivative of y with respect to t, and y''(t) is the second derivative of y with respect to t.

[0146] Then, the coordinate value conforming to the lumbar curvature is calculated as the lumbar coordinate value (Xm1, Ym1), and the coordinate value conforming to the thoracic curvature is calculated as the thoracic coordinate value (Xm2, Ym2).

[0147] Then, the error value E=(X-Xm1)+(Y-Ym1) between the coordinate values (X, Y) of all pressure sensors from Bn to B0 and the coordinate values (Xm1, Ym1) of the lumbar point is calculated, and the pressure sensor corresponding to the minimum error value is selected as the lumbar sensor. The error value E=(X-Xm2)+(Y-Ym2) between the coordinate values (X, Y) of all pressure sensors from Bn to B0 and the coordinate values (Xm2, Ym2) of the thoracic point is calculated, and the pressure sensor corresponding to the minimum error value is selected as the thoracic sensor.​​​​2 +(Y-Ym1) 2 The pressure sensor corresponding to the minimum error value is selected as the lumbar sensor. The error value E=(X-Xm2) 2 +(Y-Ym2) 2 The pressure sensor corresponding to the minimum error value is selected as the thoracic sensor.

[0148] The lumbar sensor and / or the thoracic sensor are determined based on the lumbar curvature and / or the thoracic curvature, and the calculation is more accurate.

[0149] Then, step S206 and / or step S207 are performed.

[0150] Specifically, in step S206, the support structure at the position of the lumbar sensor is selected as the support structure to be adjusted, and the support structure to be adjusted is controlled according to the pressure value of the lumbar sensor; and / or

[0151] In step S207, the support structure at the position of the thoracic sensor is selected as the support structure to be adjusted, and the support structure to be adjusted is controlled according to the pressure value of the thoracic sensor.

[0152] In one embodiment, the control of the support structure to be adjusted according to the pressure value of the lumbar sensor comprises:

[0153] When the pressure value of the lumbar sensor increases from small to large, if the pressure value of the lumbar sensor is greater than a first pressure threshold, a first instruction to reduce the stroke of the support structure to be adjusted is outputted;

[0154] When the pressure value of the lumbar sensor decreases from large to small, if the pressure value of the lumbar sensor is less than a second pressure threshold, a second instruction to increase the stroke of the support structure to be adjusted is outputted;

[0155] The control of the support structure to be adjusted according to the pressure value of the thoracic sensor comprises:

[0156] When the pressure value of the thoracic sensor increases from small to large, if the pressure value of the thoracic sensor is greater than a third pressure threshold, a third instruction to reduce the stroke of the support structure to be adjusted is outputted;

[0157] When the pressure value of the thoracic sensor decreases from large to small, if the pressure value of the thoracic sensor is less than a fourth pressure threshold, a fourth instruction to increase the stroke of the support structure to be adjusted is outputted.

[0158] Specifically, the support structure at the position of the lumbar vertebra sensor is controlled and adjusted as the support structure to be adjusted to provide support for the lumbar vertebra. The support structure at the position of the thoracic vertebra sensor is controlled and adjusted as the support structure to be adjusted to provide support for the thoracic vertebra.

[0159] And / or, in step S208, a preset number of pressure sensors above the upper leaving point pressure sensor are taken as cervical vertebra sensors, and the support structure at the position of the cervical vertebra sensor is controlled and adjusted.

[0160] Specifically, the position of the cervical vertebra sensor is the position of the upper leaving point Bn point coordinate plus a preset number k of sensors, and the corresponding support structure is raised to a certain height, and the height is determined by the ergonomics calibration data.

[0161] Wherein, step S205 and step S208 are parallel, and step S206 and step S207 are parallel, that is, the thoracic vertebra sensor, the lumbar vertebra sensor, and / or the cervical vertebra sensor can be determined, and the corresponding support mechanism is controlled and adjusted.

[0162] The embodiment automatically calculates the positions of the waist, shoulders and neck of the human body by real-time monitoring the pressure distribution of the back of the human body through the sensor, and adjusts the corresponding positions of the seat according to the calculation result, so as to provide the required support for the precise positions of the waist, shoulders and neck, thereby realizing personalized and precise back support, and realizing self-adaptive support of the seat matching the back of the human body.

[0163] In one of the embodiments, the seat back 10 further comprises a foam 2, a massage unit 3 and a support structure 4, the pressure sensor array 1 is fixed on a first surface of the foam 2, the massage unit 3 is fixed on the first surface of the foam 2 and is located in the same plane as the pressure sensor array 1, and the support structure 4 is fixed on a second surface of the foam 2.

[0164] As shown in Figure 6 , the pressure sensor array 1 is arranged in the groove of the first surface (A surface) of the foam 2, which is as close to the human body as possible while reducing the foreign body sensation.

[0165] In some embodiments, the seat back 10 comprises, in sequence, a heating pad 5, a comfortable sponge (Slab) 6, a massage unit 3, a foam 2, a ventilation air bag 7, a support structure 4 and a skeleton 8. The massage unit 3 is a massage air bag, and the support structure 4 is a support air bag. The pressure sensor array 1 is parallel to the massage unit 3 and is located between the Slab 6 and the foam 2. The heating pad 5, the Slab 6, the massage unit 3 and the pressure sensor array 1 are located on the first surface (A surface) of the foam 2, and the ventilation air bag 7, the support structure 4 and the skeleton 8 are located on the second surface (B surface) of the foam 2.

[0166] The region where the pressure sensor is arranged includes:

[0167] The region where the human body trunk line intersects with the seat, such as the region where the spine line intersects with the backrest, the region where the leg trunk line intersects with the cushion, etc.

[0168] The region where the human body interacts with the seat during the adjustment of the seat profile, such as the region where the human body interacts with the seat during the adjustment of the backrest side wing.

[0169] The region where the interaction force between the human body and the seat changes significantly during the adjustment of the seat, such as the region where the human body waist interacts with the backrest, and the interaction force changes significantly during the adjustment of the backrest angle.

[0170] The pressure sensor data on the spine line and the leg trunk line can be used to distinguish human bodies of different heights and body types.

[0171] The pressure sensor data on the spine line, the leg trunk line, the cushion / backrest side wing can be used to distinguish human bodies of different fat and thin body types.

[0172] At the same time, the pressure sensor cannot overlap with the air vent, heating wire, massage air bag, etc. in space.

[0173] The pressure sensor is pasted on one side of the foamed A surface, and a metal sheet can be pasted on each sensing point to improve the measurement accuracy and durability.

[0174] In one embodiment, the pressure sensor array 1 sequentially includes a first substrate layer 11, a sensor layer 12, a second substrate layer 13, and a reinforcing sheet layer 14 from top to bottom. The sensor layer 12 includes a plurality of pressure sensors 121 arranged at intervals, and an insulating layer 122 is filled between adjacent two pressure sensors 121. Each pressure sensor 121 sequentially includes an upper electrode 1211, a pressure-sensitive layer 1212, and a lower electrode 1213 from top to bottom. The reinforcing sheet layer 14 includes a plurality of reinforcing sheets 141 arranged at intervals, each reinforcing sheet 141 is opposite to a pressure sensor 121 below, and the cross-sectional area of the reinforcing sheet 141 is greater than the cross-sectional area of the pressure sensor 121.

[0175] As shown in Figure 7 and Figure 8 , the pressure sensor array 1 includes a first substrate layer 11, a sensor layer 12, a second substrate layer 13, and a reinforcing sheet layer 14. The first substrate layer 11 and the second substrate layer 13 are polyethylene terephthalate (PET) substrates.

[0176] The sensor layer 12 comprises a plurality of pressure sensors 121 arranged at intervals, and an insulating layer 122 is filled between two adjacent pressure sensors 121, each pressure sensor 121 comprises, from top to bottom, an upper electrode 1211, a pressure-sensitive layer 1212 and a lower electrode 1213. The upper electrode 1211 and the lower electrode 1213 are preferably silver paste electrodes, and the pressure-sensitive layer 1212 preferably adopts carbon-based composite ink.

[0177] The reinforcing sheet layer 14 comprises a plurality of reinforcing sheets 141 arranged at intervals, each reinforcing sheet 141 is directly below a pressure sensor 121, and the cross-sectional area of the reinforcing sheet 141 is greater than that of the pressure sensor 121. The reinforcing sheet 141 is preferably a stainless steel reinforcing sheet. Since the cross-sectional area of the reinforcing sheet 141 is greater than that of the pressure sensor 121, the stress balance can be ensured. The plurality of reinforcing sheets 141 are arranged at intervals, so as to avoid mutual influence.

[0178] As shown in Figure 9 the working flowchart of the seat back adjustment method of the vehicle according to the best embodiment of the present application, comprising:

[0179] In step S901, all pressure sensors on the spine line are scanned;

[0180] In step S902, an initial pressure matrix value [P0,…P n ] on the spine line is obtained;

[0181] In step S903, two points Pi and Pj are obtained between P0 and P n / 2 and P n / 2 and P n , which are less than the pressure threshold value and the pressure value of the next pressure sensor is 0, the two points are taken as the pressure cutoff points B0 and Bn, and the current position coordinates of the sensors are calculated based on the initial position of the sensors and the pressure values, taking B0 as the coordinate origin, and the coordinates (Xi, Yi) … (Xj, Yj) of the sensors between B0 and Bn are output;

[0182] In step S904, the parameters a-h in the spline curve equation can be solved by taking the above coordinates as parameters;

[0183] x(t)=at 3 +bt 2 +ct+d

[0184] y(t)=et 3 +ft 2 +gt+h

[0185] In step S905, the arc length formula is used to calculate the arc length of any segment between Bn and B0, and the parameter t interval is [0, 1];

[0186] Step S906, the proportion of the arc length between the lumbar point / thoracic point and B0 to the overall arc length is obtained by calibration, and the parameters t of the corresponding positions are obtained by using the arc length integral formula, and the coordinates (Xm1, Ym1), (Xm2, Ym2) of the corresponding positions are obtained.

[0187] Step S907, the error value E1=(X-Xm1) 2 +(Y-Ym1) 2 between the coordinates of all sensors between Bn and B0 and (Xm1, Ym1) is calculated, and the error value E2=(X-Xm2) 2 +(Y-Ym2) 2 between the coordinates of all sensors between Bn and B0 and (Xm2, Ym2) is calculated.

[0188] Step S908, the sensor with the minimum error value is the nearest sensor, and the coordinates (Xn1, Yn1), (Xn2, Yn2) of the nearest lumbar / thoracic sensor are output.

[0189] Step S909, the support structure corresponding to the lumbar sensor position:

[0190] ① The lumbar region: when the pressure becomes large, the pressure> threshold 1, the output reduces the stroke instruction; when the pressure becomes small, the pressure< threshold 2, the output increases the stroke instruction;

[0191] Step S910, the support structure corresponding to the thoracic sensor position:

[0192] The thoracic region: when the pressure becomes large, the pressure> threshold 3, the output reduces the stroke instruction; when the pressure becomes small, the pressure< threshold 4, the output increases the stroke instruction;

[0193] Step S911, increase k sensors above the Bn point coordinates as the position of the corresponding cervical sensor, and the corresponding support structure is lifted to a certain height (the height is determined by the man-machine engineering calibration data).

[0194] It should be understood that the size of the serial number of each step in the above embodiment does not mean the order of execution, and the execution order of each process should be determined according to its function and internal logic, and should not constitute any limitation on the implementation process of the embodiment of the present application.

[0195] As Figure 10 shown is a hardware structure schematic diagram of an electronic device, comprising:

[0196] at least one processor 1001; and,

[0197] a memory 1002 in communication connection with the at least one processor 1001; wherein,

[0198] The memory 1002 stores instructions that can be executed by at least one of the processors to enable the at least one of the processors to perform the vehicle seat back adjustment method as described above.

[0199] Figure 10 Take processor 1001 as an example.

[0200] The electronic device may also include an input device 1003 and a display device 1004.

[0201] The processor 1001, memory 1002, input device 1003 and display device 1004 can be connected by a bus or other means. The figure shows an example of connection by a bus.

[0202] The memory 1002, as a non-volatile computer-readable storage medium, can be used to store non-volatile software programs, non-volatile computer-executable programs, and modules, such as the program instructions / modules corresponding to the vehicle seat backrest adjustment method in the embodiments of this application. Figure 1 , Figure 2 The method flow is shown. The processor 1001 executes various functional applications and data processing by running non-volatile software programs, instructions, and modules stored in the memory 1002, thereby realizing the vehicle seat back adjustment method in the above embodiment.

[0203] The memory 1002 may include a program storage area and a data storage area. The program storage area may store the operating system and applications required for at least one function; the data storage area may store data created based on the use of the vehicle seat back adjustment method. Furthermore, the memory 1002 may include high-speed random access memory and may also include non-volatile memory, such as at least one disk storage device, flash memory device, or other non-volatile solid-state storage device. In some embodiments, the memory 1002 may optionally include memory remotely located relative to the processor 1001, and these remote memories may be connected via a network to the apparatus performing the vehicle seat back adjustment method. Examples of such networks include, but are not limited to, the Internet, intranets, local area networks, mobile communication networks, and combinations thereof.

[0204] The input device 1003 can receive user clicks and generate signal inputs related to user settings and function controls for vehicle seat back adjustment methods. The display device 1004 may include a display screen or other display equipment.

[0205] When one or more modules are stored in the memory 1002 and are run by one or more processors 1001, the vehicle seat back adjustment method in any of the above method embodiments is executed.

[0206] The present application determines a spine curve equation conforming to the passenger's back curve according to the pressure value of the passenger on the seat backrest, and determines and controls the actuation of the support structure to be adjusted based on the spine curve equation, so that the actuation position can be adaptively adjusted according to the passenger's back curve, thereby realizing personalized and accurate back support.

[0207] An embodiment of the present application provides a storage medium, which stores computer instructions, when the computer executes the computer instructions, all steps of the vehicle seat backrest adjustment method as described above are executed.

[0208] In the context of the present disclosure, the storage medium can be a tangible medium, which can contain or store programs for use by or in conjunction with an instruction execution system, apparatus or device. The storage medium can be a machine-readable signal medium or a machine-readable storage medium. Alternatively, the storage medium can be a non-transitory computer-readable storage medium, for example, the non-transitory computer-readable storage medium can be a ROM, a random access memory (RAM), a compact disc read-only memory (CD-ROM), a magnetic tape, a floppy disk and an optical data storage device, etc.

[0209] An embodiment of the present application provides a computer program product, which comprises computer programs / instructions, when executed by a processor, the vehicle seat backrest adjustment method as described above is realized.

[0210] The above-mentioned embodiments only express several embodiments of the present application, which are described in a more specific and detailed manner, but should not be understood as a limitation on the scope of the patent of the present application. It should be noted that, for ordinary skilled persons in the art, several modifications and improvements can be made without departing from the concept of the present application, which all belong to the protection scope of the present application. Therefore, the protection scope of the patent of the present application should be subject to the appended claims.

Claims

1. A method of adjusting a vehicle seat back, characterized by, The method comprises: obtaining a plurality of pressure values of a pressure sensor array on a seat back of a vehicle, the pressure sensor array comprising a plurality of pressure sensors arranged along a height direction of the seat back; establishing a spine curve equation based on a deformation amount corresponding to the pressure values and positions of the pressure sensors; determining a support structure to be adjusted at a back part of an occupant based on the spine curve equation, and controlling the support structure to be adjusted to actuate. The method further comprises: determining an upper and a lower take-off point pressure sensor from the pressure sensors, wherein the upper take-off point pressure sensor is searched in an upward direction from a middle pressure sensor, and the pressure value of the upper take-off point pressure sensor is less than a pressure threshold value and the pressure value of a next pressure sensor of the upper take-off point pressure sensor is zero, and the lower take-off point pressure sensor is searched in a downward direction from the middle pressure sensor, and the pressure value of the lower take-off point pressure sensor is less than the pressure threshold value and the pressure value of a next pressure sensor of the lower take-off point pressure sensor is zero; establishing a two-dimensional coordinate system with the upper or lower take-off point pressure sensor as an origin, a first dimension coordinate of the two-dimensional coordinate system being a relative distance between the pressure sensor and the origin, and a second dimension coordinate of the two-dimensional coordinate system being a deformation amount corresponding to the pressure value of the pressure sensor; determining coordinate values of the upper and lower take-off point pressure sensors and pressure sensors between the upper and lower take-off point pressure sensors as to-be-measured sensors, and establishing a spine curve equation based on the coordinate values of the to-be-measured sensors.

2. The vehicle seat back adjustment method of claim 1, wherein The spine curve equation is a cubic spline curve equation.

3. The vehicle seat backrest adjustment method of claim 2, wherein The method further comprises: constructing the cubic spline curve equation as: x(t) = at + bt + ct + d 3 + bt + ct + d 2 + bt + ct + d y(t) = et 3 + ft 2 + gt+ h wherein x is the first dimension coordinate, y is the second dimension coordinate, t is an auxiliary parameter, a is a first fitting parameter, b is a second fitting parameter, c is a third fitting parameter, d is a fourth fitting parameter, e is a fifth fitting parameter, f is a sixth fitting parameter, g is a seventh fitting parameter, and h is an eighth fitting parameter; substituting the coordinate values of the to-be-measured sensors and corresponding auxiliary parameters into the cubic spline curve equation to solve the first, second, third, fourth, fifth, and sixth fitting parameters; substituting the solved first, second, third, fourth, fifth, and sixth fitting parameters into the cubic spline curve equation to obtain the spine curve equation.

4. The vehicle seat back adjustment method of claim 1, wherein The method further comprises: determining a lumbar sensor at a lumbar position of the occupant and / or a thoracic sensor at a thoracic position of the occupant based on the spine curve equation; and controlling the lumbar sensor and / or the thoracic sensor to actuate. The support structure at the position of the lumbar vertebra sensor is taken as the support structure to be adjusted, and the support structure to be adjusted is controlled to act according to the pressure value of the lumbar vertebra sensor; and / or The support structure at the position of the thoracic vertebra sensor is taken as the support structure to be adjusted, and the support structure to be adjusted is controlled to act according to the pressure value of the thoracic vertebra sensor.

5. The vehicle seat backrest adjustment method of claim 4, wherein, The lumbar vertebra sensor at the position of the lumbar vertebra of the passenger and / or the thoracic vertebra sensor at the position of the thoracic vertebra of the passenger is determined based on the spine curve equation, including: The length of the curve between the upper take-off point pressure sensor and the lower take-off point pressure sensor is calculated based on the spine curve equation; The length of the lumbar vertebra is calculated according to the first proportional coefficient of the lumbar vertebra and the spine, the coordinate value in the spine curve equation that meets the length of the lumbar vertebra is solved as the lumbar vertebra coordinate value, and the pressure sensor closest to the lumbar vertebra coordinate value is calculated as the lumbar vertebra sensor; and / or The length of the thoracic vertebra is calculated according to the second proportional coefficient of the thoracic vertebra and the spine, the coordinate value in the spine curve equation that meets the length of the thoracic vertebra is solved as the thoracic vertebra coordinate value, and the pressure sensor closest to the thoracic vertebra coordinate value is calculated as the thoracic vertebra sensor.

6. The vehicle seat back adjustment method of claim 4, wherein, The lumbar vertebra sensor at the position of the lumbar vertebra of the passenger and / or the thoracic vertebra sensor at the position of the thoracic vertebra of the passenger is determined based on the spine curve equation, including: The coordinate value in the spine curve equation that meets the curvature of the lumbar vertebra is solved as the lumbar vertebra coordinate value, and the pressure sensor closest to the lumbar vertebra coordinate value is calculated as the lumbar vertebra sensor; and / or The coordinate value in the spine curve equation that meets the curvature of the thoracic vertebra is solved as the thoracic vertebra coordinate value, and the pressure sensor closest to the thoracic vertebra coordinate value is calculated as the thoracic vertebra sensor.

7. The vehicle seat backrest adjustment method of claim 4, wherein: The lumbar vertebra sensor at the position of the lumbar vertebra of the passenger and / or the thoracic vertebra sensor at the position of the thoracic vertebra of the passenger is determined based on the spine curve equation, including: The first instruction for reducing the stroke of the support structure to be adjusted is output if the pressure value of the lumbar vertebra sensor is greater than the first pressure threshold when the pressure value of the lumbar vertebra sensor changes from small to large; The second instruction for increasing the stroke of the support structure to be adjusted is output if the pressure value of the lumbar vertebra sensor is less than the second pressure threshold when the pressure value of the lumbar vertebra sensor changes from large to small; The thoracic vertebra sensor at the position of the thoracic vertebra of the passenger and / or the lumbar vertebra sensor at the position of the lumbar vertebra of the passenger is determined based on the spine curve equation, including: The third instruction for reducing the stroke of the support structure to be adjusted is output if the pressure value of the thoracic vertebra sensor is greater than the third pressure threshold when the pressure value of the thoracic vertebra sensor changes from small to large; The fourth instruction for increasing the stroke of the support structure to be adjusted is output if the pressure value of the thoracic vertebra sensor is less than the fourth pressure threshold when the pressure value of the thoracic vertebra sensor changes from large to small.

8. The vehicle seat back adjustment method of claim 1, wherein, The lumbar vertebra sensor at the position of the lumbar vertebra of the passenger and / or the thoracic vertebra sensor at the position of the thoracic vertebra of the passenger is determined based on the spine curve equation, including: The support structure at the position of the lumbar vertebra sensor is taken as the support structure to be adjusted, and the support structure to be adjusted is controlled to act according to the pressure value of the lumbar vertebra sensor; and / or The support structure at the position of the thoracic vertebra sensor is taken as the support structure to be adjusted, and the support structure to be adjusted is controlled to act according to the pressure value of the thoracic vertebra sensor.

9. The vehicle seat backrest adjustment method according to any one of claims 1 to 8, characterized by, The seat backrest (10) further comprises a foam (2), a massage unit (3) and a support structure (4), the pressure sensor array (1) is fixed on a first surface of the foam (2), the massage unit (3) is fixed on the first surface of the foam (2) and is in the same plane as the pressure sensor array (1), and the support structure (4) is fixed on a second surface of the foam (2).

10. The vehicle seat back adjustment method according to any one of claims 1 to 8, characterized by, The pressure sensor array (1) comprises, from top to bottom, a first substrate layer (11), a sensor layer (12), a second substrate layer (13) and a reinforcing sheet layer (14), the sensor layer (12) comprises a plurality of pressure sensors (121) arranged at intervals, and an insulating layer (122) is filled between adjacent two pressure sensors (121), each pressure sensor (121) comprises, from top to bottom, an upper electrode (1211), a pressure-sensitive layer (1212) and a lower electrode (1213), and the reinforcing sheet layer (14) comprises a plurality of reinforcing sheets (141) arranged at intervals, each reinforcing sheet (141) is opposite to a pressure sensor (121) below, and the cross-sectional area of the reinforcing sheet (141) is greater than that of the pressure sensor (121).

11. An electronic device, comprising: Comprise: At least one processor; And, The memory is in communication with the at least one processor; wherein The memory stores instructions executable by the at least one processor, and the instructions are executed by the at least one processor to enable the at least one processor to perform the vehicle seat backrest adjustment method of any one of claims 1 to 10.

12. A storage medium, characterized by The storage medium stores computer instructions, and when the computer executes the computer instructions, all steps of the vehicle seat backrest adjustment method of any one of claims 1 to 10 are executed.

13. A computer program product comprising computer programs / instructions, characterized in that, The computer program / instructions are executed by the processor to implement the vehicle seat backrest adjustment method of any one of claims 1 to 10.

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