Automobile seat inflation supporting system and inflation control method

Abstract

The invention discloses an automobile seat inflation supporting system and an inflation control method, and the system comprises a pressure sensing array which is used for obtaining current seat pressure information; the intelligent control module is electrically connected with the pressure sensing array and used for obtaining pressure distribution information according to the current seat pressure information; according to the pressure distribution information, target pressure control quantity of each air chamber is calculated; and the inflating device is arranged on the seat air chambers, is electrically connected with the intelligent control module and is used for inflating or deflating each air chamber according to the target pressure control quantity under the control of the intelligent control module, so that the pressure of each air chamber is close to a preset target pressure value. According to the scheme, through real-time pressure sensing and closed-loop control, dynamic and accurate matching of the seat supporting form and the passenger posture is achieved, and the comfort and safety of the seat are remarkably improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of automobile seats, and in particular to an air support system for an automobile seat and an air control method. BACKGROUND

[0002] With the development of automobile intelligence, users have increasingly high requirements for ride comfort. Traditional automobile seats are mostly fixed in form and cannot adapt to the body characteristics of different passengers, resulting in a lack of effective support for key parts such as the waist and legs during long-distance driving, which easily leads to fatigue.

[0003] Some intelligent seats use preset massage modes or preliminary adjustment schemes based on image recognition, such as matching preset gears after obtaining the body shape of a user through a camera. However, such technical adjustment methods are single, lack real-time perception and feedback of the pressure distribution of passengers, cannot achieve dynamic and adaptive conformal support, and have limited intelligence. SUMMARY

[0004] In view of the above, the present application aims to provide an air support system for an automobile seat and an air control method to solve the aforementioned technical problems.

[0005] The technical solution adopted by the present application is as follows:

[0006] The present application provides an air support system for an automobile seat, which comprises:

[0007] a pressure sensor array for obtaining current seat pressure information;

[0008] an intelligent control module electrically connected to the pressure sensor array, configured to obtain pressure distribution information according to the current seat pressure information, and to calculate target pressure control amounts for each air chamber according to the pressure distribution information;

[0009] an air charging device provided on the seat air chamber, electrically connected to the intelligent control module, configured to charge or discharge each air chamber according to the target pressure control amounts according to the control of the intelligent control module, so that the pressure of each air chamber approaches a preset target pressure value.

[0010] Optionally, the pressure sensor array is made of a flexible piezoresistive material and arranged in a dot matrix form on the surface of the seat cushion and backrest.

[0011] Optionally, the pressure sensor array is divided into not less than six pressure monitoring zones.

[0012] Optionally, the seat air chambers are flexibly connected through a honeycomb structure.

[0013] The seat air chamber is composed of a contact layer and a support layer.

[0014] The application further provides an air control method of the air supporting system of the automobile seat, comprising:

[0015] After the passenger sits on the seat, current seat pressure information is acquired;

[0016] According to the current seat pressure information, pressure distribution information is obtained;

[0017] According to the pressure distribution information, target pressure control amounts of each air chamber are calculated;

[0018] According to the target pressure control amounts, each air chamber is inflated or deflated, so that the pressure of each air chamber approaches a preset target pressure value.

[0019] Optionally, according to the seat pressure information, the pressure distribution information is obtained, comprising:

[0020] According to the seat pressure information, a pressure thermal map is established;

[0021] According to the established pressure thermal map, the pressure distribution information is obtained.

[0022] Optionally, according to the pressure distribution information, the target pressure control amounts of each air chamber are calculated, comprising:

[0023] According to the target pressure value and the pressure distribution information, a pressure error value is obtained;

[0024] According to the pressure error value, the target pressure control amount is obtained.

[0025] Optionally, according to the target pressure control amounts, each air chamber is inflated or deflated, so that the pressure of each air chamber approaches a preset target pressure value, comprising:

[0026] If the target pressure control amount is positive, inflation is performed;

[0027] If the target pressure control amount is negative, deflation is performed.

[0028] Optionally, the air control method of the air supporting system of the automobile seat further comprises:

[0029] Vehicle steering angular velocity information is received;

[0030] According to the vehicle steering angular velocity information, lateral acceleration is predicted;

[0031] According to the lateral acceleration, an inflation pressure value is obtained, and the side air chamber is inflated.

[0032] Optionally, the air control method of the air supporting system of the automobile seat further comprises:

[0033] When an emergency braking signal is detected, the lumbar air chamber is inflated within a preset time, raising the pressure of the lumbar air chamber to a preset reinforcement support value.

[0034] The above-described solution of the present invention has at least the following beneficial effects:

[0035] The above-mentioned solution of the present invention includes: a pressure sensing array for acquiring current seat pressure information; an intelligent control module electrically connected to the pressure sensing array for obtaining pressure distribution information based on the current seat pressure information; calculating the target pressure control amount for each air chamber based on the pressure distribution information; and an inflation device disposed on the air chamber of the seat, the inflation device being electrically connected to the intelligent control module for inflating or deflating each air chamber according to the target pressure control amount under the control of the intelligent control module, so that the pressure of each air chamber approaches a preset target pressure value. The solution of the present invention achieves dynamic and precise matching between the seat support form and the occupant's body posture through real-time pressure sensing and closed-loop control, fundamentally solving the adaptability problem of fixed seats; it integrates posture recognition, scene linkage, and self-learning algorithms, upgrading the seat from "passive response" to "active adaptation," significantly improving comfort and safety. Attached Figure Description

[0036] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described below with reference to the accompanying drawings, wherein:

[0037] Figure 1 This is a schematic diagram of a car seat provided in an embodiment of the present invention.

[0038] Figure 2 A flowchart of an inflation control method for an inflatable support system for an automobile seat provided in an embodiment of the present invention. Detailed Implementation

[0039] Embodiments of the present invention are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0040] This invention proposes an embodiment of an inflatable support system and an inflation control method for automotive seats, specifically, as follows: Figure 1 As shown, it includes:

[0041] Pressure sensor array is used to acquire current seat pressure information;

[0042] The intelligent control module is electrically connected to the pressure sensor array and is used to obtain pressure distribution information based on the current seat pressure information; and to calculate the target pressure control amount for each air chamber based on the pressure distribution information.

[0043] An inflation device is installed on the seat air chamber 1. The inflation device is electrically connected to the intelligent control module and is used to inflate or deflate each air chamber according to the target pressure control amount under the control of the intelligent control module, so that the pressure of each air chamber approaches the preset target pressure value.

[0044] In this embodiment, the pressure sensing array consists of 32 thin-film pressure sensors, which are distributed in a dot matrix on the seat surface and backrest. They are divided into no less than six functional monitoring areas, such as the waist, hips, and legs, to ensure accurate coverage of the human body's pressure-sensitive areas and to collect pressure information data of the seat and the occupant's contact surface in real time.

[0045] The inflation device comprises at least four independently controllable inflatable chambers (preferably six) for providing dynamic support and massage. The chambers are flexibly connected via a biomimetic honeycomb structure. Each chamber is made of a gradient composite material, including a breathable contact layer and a support layer with a corrugated reinforcement structure. The contact layer is a TPU + fabric composite with a Shore A hardness of 35A and a breathability >200L / m² / s. The support layer is made of corrugated reinforced TPU with a bending stiffness ≥120N / mm, achieving a balance between comfort and support stiffness.

[0046] The intelligent control module is electrically connected to the pressure sensor array and the inflation device. This module is the "brain" of the system, possessing functions such as pressure distribution modeling, human posture recognition, and air chamber pressure optimization algorithms. Based on the pressure distribution data, it dynamically calculates the target pressure of each air chamber through advanced control algorithms and drives the air pump and solenoid valve assembly to perform precise inflation or deflation operations.

[0047] like Figure 2 As shown, the inflation control method for an inflatable support system for a car seat includes:

[0048] S1. After the occupant sits in the seat, obtain the current seat pressure information;

[0049] When passengers of different body types or the driver sit in the seat, the pressure sensor array collects pressure information and transmits it to the intelligent control module.

[0050] S2. Obtain pressure distribution information based on the current seat pressure information;

[0051] The seat pressure information collected by the sensor array is scanned at a frequency of 10Hz to establish a pressure heat map; based on the established pressure heat map, pressure distribution information is obtained, and high pressure concentration areas are identified.

[0052] S3. Based on the pressure distribution information, calculate the target pressure control quantity for each air chamber, including:

[0053] The pressure error value is obtained based on the target pressure value and pressure distribution information;

[0054] The target pressure control value is obtained based on the pressure error value.

[0055] Specifically, the pressure error is calculated based on the target pressure value set by the user and the current pressure fed back by the sensor;

[0056] Based on this error, the discrete position PID formula is used:

[0057] = + Calculate the control output;

[0058] Depending on the sign and magnitude of the control quantity, the air pump and solenoid valve are driven to perform the corresponding inflation or deflation operations.

[0059] in, This is the proportionality coefficient. The integral coefficient is... These are the differential coefficients. To control the output, This represents the error of the current sampling period.

[0060] To improve performance, this PID algorithm also integrates feedforward compensation: ) and anti-interference modules (such as Kalman filters), SP is the feedforward term for the rate of change of the setpoint, and SP is the target pressure.

[0061] S4. Inflate or deflate each air chamber according to the target pressure control amount, so that the pressure in each air chamber approaches the preset target pressure value. Specifically, if the target pressure control amount is positive, inflate to make the pressure in each air chamber approach the preset target pressure value; if the target pressure control amount is negative, deflate to make the pressure in each air chamber approach the preset target pressure value.

[0062] Furthermore, the intelligent control module also includes a human posture recognition unit:

[0063] The coordinates of the center of pressure (COP) are calculated based on the pressure distribution data; the occupant's sitting posture angle is calculated based on the second-order moment analysis of the pressure distribution; specific postural characteristics of the occupant (such as leaning forward or crossing legs) are diagnosed based on the pressure ratio relationship of each functional monitoring zone; when the movement speed of the center of pressure exceeds a preset threshold (such as 15 mm / s), it is determined to be a state of fatigue and the corresponding massage mode is triggered.

[0064] Locating the center of pressure:

[0065] ;

[0066] ;

[0067] Output the coordinates of the human body's center of gravity .

[0068] in, , Let be the coordinates of the point in the i-th row and j-th column; For point Weights (such as quality, probability, density, etc.); It is the sum of all weights.

[0069] Calculation of seated tilt angle:

[0070] ;

[0071] when At that time, the target extends further in the horizontal direction. It is close to horizontal;

[0072] when At that time, the target extends further in the vertical direction. It is nearly vertical.

[0073] When a passenger or driver is detected to be leaning forward by more than 10°, lumbar support is activated; when the driver is leaning to the side by more than 8°, balance adjustment is initiated.

[0074] Meanwhile, when the movement speed of the pressure center is greater than 15mm / s, it is determined to be fatigue shaking, and the seat will activate rhythmic massage.

[0075] Furthermore, the system possesses adaptive learning capabilities and scene linkage functions, including:

[0076] Receive vehicle steering angular velocity information; predict lateral acceleration based on the vehicle steering angular velocity information; obtain inflation pressure value based on the lateral acceleration, and inflate the side wing air chambers.

[0077] Specifically, the system records driver stress distribution preference data and can build and update personalized support models based on LSTM neural networks; it can also integrate with the vehicle's advanced driver assistance systems (ADAS) or navigation systems. For example, it can predict lateral G-forces based on steering angle and pre-inflate the side wing air chambers (predicting lateral G-forces 200ms in advance); it can quickly strengthen lumbar support during emergency braking (pressurizing the lumbar air chambers to 12kPa within 0.2 seconds); and it can automatically activate a relaxation mode on long-distance routes based on navigation information.

[0078] In a preferred embodiment of this system, a 24×32 dot matrix pressure sensor array is constructed using flexible piezoresistive sensors with a thickness of 0.8 mm. This array communicates with the vehicle's ECU (intelligent control module) via a CAN bus (500 kbps baud rate). The ECU employs a high-performance microprocessor and runs a PID-based control algorithm and human posture recognition software.

[0079] The inflation device comprises six independent air chambers, driven by a miniature brushless air pump (flow rate 2.5L / min) and a multi-channel solenoid valve assembly (response time <50ms). Based on data from the pressure sensor array, the control unit first performs human posture recognition. For example, if the calculated sitting tilt angle is greater than 10°, it is determined to be forward-leaning driving, and then a pre-stored strategy is invoked to increase the target pressure in the lumbar air chamber by 2kPa.

[0080] The system then enters a PID control loop: the ECU reads the current chamber pressure and compares it with the target value to obtain the error e(k). Using the pre-tuned PID parameters (Kp=1.2, Ki=0.05, Kd=0.1), the control quantity u(k) is calculated. If u(k) is positive, the intake valve and air pump are opened proportionally for inflation; if it is negative, the exhaust valve is opened for exhaust. This process repeats until the pressure error is less than the tolerance threshold (±0.3 kPa), thus achieving precise pressure control.

[0081] For the massage function, the ECU dynamically modifies the target pressure value SP(t) through a timing control algorithm. For example, in the "wave-like" massage mode, SP(t) changes according to a sine wave, and the PID algorithm tracks this curve in real time, driving the air chamber to generate corresponding pressure fluctuations to achieve the massage effect.

[0082] In addition, the system receives emergency braking signals from ADAS via the CAN bus. Upon receiving this signal, the ECU immediately interrupts the current operation and increases the lumbar air chamber pressure to 12 kPa within 0.2 seconds to provide emergency support. Simultaneously, the system continuously records the driver's preferred pressure distribution, and after a learning period of approximately 7 days, it can automatically generate and recall a personalized support model.

[0083] In summary, the automotive seat inflatable support system and inflation control method of this embodiment achieve dynamic and precise matching between the seat support form and the occupant's body posture through real-time pressure sensing and closed-loop control, fundamentally solving the adaptability problem of fixed seats; it integrates posture recognition, scene linkage and self-learning algorithms, enabling the seat to upgrade from "passive response" to "active adaptation", significantly improving comfort and safety.

[0084] In this invention, when directional terms are mentioned, they are relative concepts based on the embodiments. Furthermore, "at least one" refers to one or more, and "more than one" refers to two or more. "And / or" describes the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent the existence of A alone, A and B simultaneously, or B alone. A and B can be singular or plural. The character " / " generally indicates that the preceding and following related objects have an "or" relationship. "At least one of the following" and similar expressions refer to any combination of these items, including any combination of single or plural items. For example, at least one of a, b, and c can represent: a, b, c, a and b, a and c, b and c, or a and b and c, where a, b, and c can be single or multiple.

[0085] The above description of the structure, features, and effects of the present invention is based on the embodiments shown in the figures. However, the above are only preferred embodiments of the present invention. It should be noted that the technical features involved in the above embodiments and their preferred methods can be reasonably combined and matched by those skilled in the art to form a variety of equivalent solutions without departing from or changing the design concept and technical effects of the present invention. Therefore, the present invention is not limited to the scope of implementation shown in the figures. Any changes made in accordance with the concept of the present invention, or modifications to equivalent embodiments, that do not exceed the spirit covered by the specification and figures, should be within the protection scope of the present invention.

Claims

1. A car seat inflatable support system, characterized in that, include: Pressure sensor array is used to acquire current seat pressure information; The intelligent control module is electrically connected to the pressure sensor array and is used to obtain pressure distribution information based on the current seat pressure information; and to calculate the target pressure control amount for each air chamber based on the pressure distribution information. An inflation device is installed on the air chamber of the seat. The inflation device is electrically connected to the intelligent control module and is used to inflate or deflate each air chamber according to the target pressure control amount under the control of the intelligent control module, so that the pressure of each air chamber approaches the preset target pressure value.

2. The automotive seat inflatable support system according to claim 1, characterized in that, The pressure sensor array is made of flexible piezoresistive material and is arranged in a dot matrix on the surface of the seat cushion and backrest.

3. The automotive seat inflatable support system according to claim 2, characterized in that, The pressure sensing array is divided into no fewer than six pressure monitoring zones.

4. The automotive seat inflatable support system according to claim 1, characterized in that, The air chambers of the seat are flexibly connected by a honeycomb structure; The seat air chamber is composed of a contact layer and a support layer.

5. An inflation control method for an inflatable support system for a car seat, characterized in that, include: After the occupant is seated, the current seat pressure information is obtained; Based on the current seat pressure information, pressure distribution information is obtained; Based on the pressure distribution information, calculate the target pressure control value for each air chamber; According to the target pressure control amount, each air chamber is inflated or deflated to make the pressure of each air chamber approach the preset target pressure value.

6. The inflation control method for the automotive seat inflation support system according to claim 5, characterized in that, Based on the seat pressure information, pressure distribution information is obtained, including: Based on the seat pressure information, a pressure heat map is established; Pressure distribution information is obtained by establishing a pressure heat map.

7. The inflation control method for the automotive seat inflation support system according to claim 5, characterized in that, Based on the pressure distribution information, the target pressure control value for each air chamber is calculated, including: The pressure error value is obtained based on the target pressure value and pressure distribution information; The target pressure control value is obtained based on the pressure error value.

8. The inflation control method for the automotive seat inflation support system according to claim 5, characterized in that, Inflate or deflate each chamber according to the target pressure control amount, so that the pressure in each chamber approaches the preset target pressure value, including: If the target pressure control value is positive, then inflate. If the target pressure control value is negative, then release the gas.

9. The inflation control method for the automotive seat inflation support system according to claim 5, characterized in that, Also includes: Receive vehicle steering angular velocity information; Based on the vehicle's steering angular velocity information, predict the lateral acceleration; Based on the lateral acceleration, the inflation pressure value is obtained, and the side wing air chambers are inflated.

10. The inflation control method for the automotive seat inflation support system according to claim 5, characterized in that, Also includes: When an emergency braking signal is detected, the lumbar air chamber is inflated within a preset time, raising the pressure of the lumbar air chamber to a preset reinforcement support value.

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