CN117959103A - A multi-posture mattress control system and method for preventing bedsores - Google Patents

Abstract

The present invention relates to a multi-posture mattress control system and method for preventing bedsores, which are applied to the technical field of bedsore protection, including: for the prevention of bedsores at different back-raising angles, the present application designs a rotatable airbag support plate with an angle sensor, and judges the back-raising height of a human body according to data fed back by the angle sensor to achieve the prevention of bedsores at different back-raising angles; for the control of local pressure of the human body, a method of overall packaging of airbag numbers and pressure value data is adopted to establish a mapping relationship between human body pressure and airbags, so as to achieve local pressure control of the human body; a difference algorithm is adopted to process pressure data to judge whether there is a local high-pressure area in the human body, so as to achieve accurate prevention of bedsores and reduce the risk of bedsores.

Description

A multi-posture mattress control system and method for preventing bedsores

Technical Field

The invention relates to the technical field of bedsore protection, and in particular to a multi-posture bedsore prevention mattress control system and method.

Background technique

There are many factors that affect bedsores, the main one being pressure, including vertical pressure, friction and shear force. Studies have shown that when capillary pressure exceeds 32 mmhg and lasts for 2 hours, bedsores are very likely to occur. When the human body is in one posture for a long time, it will cause increased skin pressure, which will compress the capillaries, affect metabolism, and easily cause bedsores. And the location of bedsores is different in different postures. Generally speaking, bedsores are prone to occur in the supine position, heels, sacrum and coccyx, and scapula; bedsores are prone to occur on the buttocks in sitting and semi-lying positions.

Currently, bedsore mattresses for bedsores mainly use a cyclic inflation and deflation operation of the airbags at a scheduled time of 2 hours or other time periods to redistribute the patient's pressure, which plays a certain preventive role. However, this method cannot accurately inflate and deflate the key areas where bedsores occur, resulting in a poor effect on bedsore protection.

Summary of the invention

In view of this, an object of the present invention is to provide a multi-posture bedsore prevention mattress control system and method to solve the problem in the prior art that the airbags are regularly inflated and deflated cyclically, high-risk areas for bedsores cannot be accurately located, and the bedsore protection effect is poor.

According to a first aspect of an embodiment of the present invention, a multi-posture mattress control system for preventing bedsores is provided, the system comprising:

Airbag support plate: one side of the airbag support plate is also provided with airbag grooves in a honeycomb array;

Airbag layer: the airbag layer is composed of a plurality of airbag honeycomb arrays, which correspond one to one with the airbag grooves of the airbag support plate, and the airbag layer is fixedly arranged in the airbag grooves of the airbag support plate;

Each airbag in the airbag layer is provided with an air inlet and an air outlet, the air inlet and the air outlet are connected to an air pipe, a solenoid valve is provided in the middle of the air pipe, an air pump is provided at one end of the solenoid valve, and the air pipe is controlled to be opened and closed by the solenoid valve so as to control the inflation and deflation of the airbag;

Thin film pressure sensor: The thin film pressure sensor is arranged on the airbag layer. The thin film pressure sensor is installed in a honeycomb array manner, corresponding one to one with the airbags in the airbag layer, and is used to collect pressure data of each airbag in the airbag layer;

Controller: The controller is used to receive the pressure data of the thin film pressure sensor, and calculate whether there is a local high-pressure area in the airbag layer according to a preset difference algorithm. If so, the controller controls the corresponding solenoid valve and air pump to deflate the airbag in the local high-pressure area and inflate the airbag around the local high-pressure area.

Preferably,

The airbag support plate includes a first airbag support plate and a second airbag support plate, the bottom of the first airbag support plate is connected to the top of the second airbag support plate through a rotation axis, so that the first airbag support plate can rotate around the rotation axis within a certain angle;

The length ratio of the first airbag support plate to the second airbag support plate is 1 to 1.5.

Preferably,

Also includes:

Angle sensor: arranged on the rotation axis of the first airbag support plate and the second airbag support plate, used for collecting the rotation angle of the first airbag support plate and sending the collected rotation angle of the first airbag support plate to the controller.

Preferably,

A wedge-shaped waist airbag is arranged at the bottom of the first airbag support plate close to the rotating shaft, and a plurality of strip-shaped hip airbags are arranged at the top of the second airbag support plate close to the rotating shaft.

Preferably,

The controller is also used to receive angle data from the angle sensor, and control the waist airbag and the hip airbag to inflate and deflate according to the angle data.

According to a second aspect of an embodiment of the present invention, a multi-posture bedsore prevention mattress control method is provided. The method is based on any one of the multi-posture bedsore prevention mattress control systems described above. The method comprises:

Obtaining the pressure data of each airbag in the airbag layer, processing all the pressure data using a bubble sort algorithm, arranging the pressure data in order of size, calculating the average value of all the pressure data, and recording the maximum and minimum values of the pressure data;

Calculate the difference between the maximum value and the minimum value in the pressure data, and compare the difference with the average value to obtain the ratio of the difference to the average value;

The ratio is compared with a preset ratio threshold value. If the ratio is greater than the preset ratio threshold value, there is a local high-pressure area, and the airbag in the local high-pressure area is deflated, and the surrounding airbags adjacent to the local high-pressure area are inflated;

The pressure data of each airbag in the airbag layer is reacquired, and the above steps are repeated until the ratio is less than or equal to a preset ratio threshold.

Preferably, it also includes:

The rotation angle of the first airbag support plate is obtained, and when the rotation angle is within a preset first rotation angle range, the waist airbag is inflated.

Preferably, it also includes:

Obtaining a rotation angle of the first airbag support plate, and when the rotation angle is within a preset second rotation angle range, controlling the plurality of strip-shaped buttocks airbags to partially inflate and partially deflate;

The plurality of strip-shaped buttocks airbags are inflated and deflated for a preset first time, and then maintained in a preset second time. Then, the originally inflated airbags are controlled to be deflated, and the originally deflated airbags are inflated. After the first time is continued, the state is maintained for a preset second time, and the inflation and deflation are repeated in sequence.

The technical solution provided by the embodiments of the present invention may have the following beneficial effects:

The present application provides an airbag support plate with a groove for placing the airbag on the airbag support plate; an integrally formed airbag layer is placed in the airbag groove, each airbag is provided with a separate air path for independent inflation and deflation operations, the airbags are arranged in an array manner, and the pressure of various parts of the human body can be taken into account. The pressure sensor adopts the same array manner as the airbag, and obtains the pressure value of each airbag point separately. According to the pressure values of all the airbags, a difference algorithm is used to calculate whether there is a local high-pressure area in the airbag layer. The local high-pressure area is also a high-risk area for the occurrence of bedsores. If so, the corresponding airbag is controlled to perform a decompression operation to reduce the risk of bedsores.

It is to be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the invention.

BRIEF DESCRIPTION OF THE DRAWINGS

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the invention and, together with the description, serve to explain the principles of the invention.

FIG1 is an overall schematic diagram of an airbag mattress according to an exemplary embodiment;

FIG2 is a schematic diagram showing a connection between a thin film pressure sensor and an airbag according to an exemplary embodiment;

FIG3 is a schematic diagram of an airbag mattress working in a 30° supine posture according to an exemplary embodiment;

FIG4 is a schematic diagram of the overall installation of a bedsore prevention mattress according to an exemplary embodiment;

FIG5 is a schematic diagram of a human spine according to an exemplary embodiment;

FIG6 is an enlarged schematic diagram of a waist airbag according to an exemplary embodiment;

FIG7 is a schematic flow chart of a method for controlling a multi-posture mattress for preventing bedsores according to an exemplary embodiment;

In the attached drawings: 1- airbag support plate, 2- airbag layer, 3- sponge pad, 4- hip airbag, 5- waist airbag, 6- angle sensor.

Detailed ways

Exemplary embodiments will be described in detail herein, examples of which are shown in the accompanying drawings. When the following description refers to the drawings, the same numbers in different drawings represent the same or similar elements unless otherwise indicated. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present invention. Instead, they are merely examples of devices and methods consistent with some aspects of the present invention as detailed in the appended claims.

Embodiment 1

FIG. 1 is an overall schematic diagram of an airbag mattress according to an exemplary embodiment. As shown in FIG. 1 , the system includes:

Airbag support plate 1, airbag layer 2 and cotton pad layer 3;

The airbags include three types: an integrally formed airbag layer 2, a hip airbag 4 and a waist airbag 5;

All airbags are provided with an air inlet, which is connected to the trachea. A first solenoid valve is installed in the middle to control the on-off of the air path and thus control the inflation and deflation of the airbag. The first solenoid valve is connected to an air pump, and the air pump adopts a medical silent air pump; the end of the trachea is open, and a second solenoid valve is installed at the end of the trachea, and the exhaust of the airbag is controlled by controlling the switch of the second solenoid valve; in short, when inflation is required, the first solenoid valve is opened, the second solenoid valve is closed, and the airbag is inflated by the air pump, and when deflation is required, the first solenoid valve and the second solenoid valve are opened at the same time, and the gas in the airbag passes through the first solenoid valve and is discharged from the end of the trachea through the second solenoid valve;

The buttocks airbag 4 is composed of six strip-shaped airbags, which are arranged on the top of the second airbag support plate close to the rotating shaft, and massage the buttocks by cyclically inflating and deflating air to reduce the risk of sitting bedsores;

The waist airbag 5 is composed of a wedge-shaped airbag, which conforms to the principle of ergonomics and is arranged at the bottom of the first airbag support plate near the rotating shaft. When the patient is in a supine position, the airbag is inflated to support the patient's waist. Since the airbag is wedge-shaped, there will be an upward force, which can reduce the vertical pressure of the back of the supine patient on the mattress, thereby reducing the friction and shear force on the supine patient, and reducing the risk of bedsores. The specific shape of the waist airbag 5 is shown in Figure 6;

The airbag support plate 1 includes a first airbag support plate and a second airbag support plate, the first airbag support plate and the second airbag support plate are connected by a rotation axis, the first airbag support plate can rotate around the rotation axis between 0-90 degrees, and the length ratio of the first airbag support plate to the second airbag support plate is 1 to 1.5. It is worth noting that this ratio is a national standard test ratio, that is, under this ratio, when the first airbag support plate rotates upward, the force on the waist and buttocks of the human body is most ergonomic, as shown in Figure 3;

The angle sensor 6 is arranged at the rotation axis and is used to obtain the rotation angle of the first airbag support plate;

The airbag layer 2 is a flexible layer, which is arranged between the airbag support plate 1 and the cotton pad layer 3, and is fixedly placed in the airbag groove of the airbag support plate 1; the airbag support plate 1 changes with the change of the back-lifting angle of the bed body, which can ensure that the airbag layer 2 and the airbag support plate 1 have a good connection at different back-lifting angles;

The thin film pressure sensor is installed in an array manner, which is the same as the airbag array and conforms to the ergonomic principle. The thin film pressure sensor is adhered to the airbag layer and is used to separately obtain the pressure data of each airbag in the airbag layer 2, as shown in Figure 2;

The cotton pad layer 3 is arranged on the airbag layer 2 to enable the user to have a better lying experience;

At the same time, the present application controls the electricity and gas of the control system separately, and sets up two control boxes as shown in Figure 4. The peripheral circuit of the film pressure sensor is connected to the general controller of the electric control box, and the collected pressure signal is transmitted to the controller. The air path of the airbag is connected to the solenoid valve in the air control box, which serves as a switch of the air path. It is turned on and off according to the instructions sent by the controller, and cooperates with the medical silent air pump to realize the inflation and deflation operation of the airbag.

The thin film pressure sensor uses the same array method as the airbag, and can record the airbag number to facilitate the individual control of the airbag and the local adjustment of the human body pressure. The thin film pressure sensor packages the collected data and transmits it to the controller through the data transmission module. The controller parses the pressure data and matches the parsed pressure data with the airbag number one by one. The controller processes the pressure data according to the difference algorithm and performs the operation of bedsore prevention.

The difference control algorithm is as follows: all the analyzed pressure data are arranged in order from small to large (or from large to small) by a bubble sort method, the difference between the maximum pressure and the minimum pressure is calculated, the average value of all the pressure data is calculated, and the ratio of the above difference and the average value is calculated. The value is used as a judgment standard to make a judgment with the threshold. If the ratio is greater than or equal to the set threshold, it means that the patient has uneven pressure distribution and pressure concentration. The corresponding operation is performed to redistribute the pressure to avoid pressure concentration, reduce the maximum pressure on the patient, and reduce the risk of bedsores. If the ratio is less than the set threshold, it means that the patient's pressure distribution is relatively uniform, there is no pressure concentration, and bedsores will not occur. The decompression operation can be omitted, and the pressure value continues to be monitored to calculate the average value, difference and ratio, and the previous steps are repeated.

Embodiment 2

FIG. 7 is a flow chart of a method for controlling a multi-posture mattress for preventing bedsores according to an exemplary embodiment, comprising:

S1, obtaining the pressure data of each airbag in the airbag layer, processing all the pressure data using a bubble sort algorithm, arranging the pressure data in order of size, calculating the average value of all the pressure data, and recording the maximum and minimum values of the pressure data;

S2, calculating the difference between the maximum value and the minimum value in the pressure data, and comparing the difference with the average value to obtain the ratio of the difference to the average value;

S3, comparing the ratio with a preset ratio threshold value, if the ratio is greater than the preset ratio threshold value, there is a local high pressure area, the airbag in the local high pressure area is deflated, and the surrounding airbags adjacent to the local high pressure area are inflated;

S4, reacquiring the pressure data of each airbag in the airbag layer, and repeating the above steps until the ratio is less than or equal to a preset ratio threshold;

It can be understood that after the thin film pressure sensor collects human body pressure data, it packages the data in a certain order and sends it to the controller. For example, there are 120 pressure data in total and 120 airbag numbers. The pressure data can be packaged together in the order of 1 to 120. The format of the pressure data packet can be [xxx1xxx2 xxx3...xxx120], where xxx represents the pressure data collected by the thin film pressure sensor, and the Arabic numerals 1, 2, 3... represent the airbag number corresponding to the pressure value. After receiving the pressure data packet, the controller parses the pressure data and the airbag number, and uses the bubble sort algorithm to process all the pressure data. After the pressure data is arranged in order of size, the average value p of all the pressure data is calculated, the maximum value max1 and the minimum value min1 in the pressure data are recorded, the difference a between the maximum value and the minimum value is calculated, and the ratio q of the calculated difference and the average value is used as a reference parameter for comparison with the set threshold value. This application is temporarily The threshold is set to 200%. If the ratio is greater than 200%, it means that the human pressure distribution is uneven and there is a local high-pressure area. It is considered a dangerous state and bedsores may occur. The controller sends instructions to the solenoid valve to control the corresponding actions of the solenoid valve and the air pump, deflates the airbag in the high-pressure area, inflates the airbags around the high-pressure airbag, records the pressure value max2 of the high-pressure airbag before the decompression operation, calculates the average value p2 of all pressure values after the decompression operation, calculates the ratio q2 of max2 and p2, until the value of q2 is less than 1, the decompression operation is no longer performed and the pressure monitoring mode is entered. If q1 is less than 1, the pressure monitoring continues;

It is worth emphasizing that in the above process of pressure monitoring, calculation and pressure adjustment, the waist airbag and the hip airbag do not participate in the calculation process, only the airbags in the integrally formed airbag layer participate;

The waist and hip airbags are involved in the following processes:

It also includes: obtaining the angle of the first airbag support plate through an angle sensor, when the patient is in a 0° supine posture, the thin film pressure sensor of the array collects human body pressure data, transmits it to the controller for difference processing, uses the data obtained by the difference algorithm to make a threshold judgment, and then performs local pressure adjustment. The airbags are arrayed according to the principle of ergonomics, and the airbag number and the human body position have a mapping relationship. When the human body lies on the mattress, since the rotation angle of the first airbag support plate is 0, that is, the human body is in a supine posture at this time, the pressure of the airbag corresponding to the human shoulder blade will increase, and the airbag number corresponding to the human shoulder blade can be obtained by analyzing the pressure change process of all airbags; assuming that the airbag number 48-50 corresponds to the human shoulder blade at this time, when the human shoulder blade is subjected to the maximum pressure, the pressure value transmitted by the airbag number 48-50 will increase, resulting in q becoming larger, and the airbag number of the maximum pressure value can be determined by the difference algorithm, and the number can be used to inflate and deflate the local airbag, adjust the local pressure of the human body in the 0° supine posture, and reduce the risk of bedsores;

It also includes: when the user is in a 0-30° supine position, according to the principle of ergonomics, the parts of the human body that are under greater pressure are the shoulder blades and the coccyx, and the pressure prevention of these parts can be processed according to the above-mentioned difference algorithm and its control logic. Since the human spine has an arc, as shown in Figure 5, the angle sensor can transmit the angle of the first airbag support plate rotating with the bed plate to the controller, and the controller appropriately inflates the waist airbag 5 according to the angle value, which plays a supporting role in the waist, conforms to the human spine curve, and improves the patient's comfort;

It also includes: when the user is in a supine position of 30-60 degrees, due to the effect of gravity, the human body lying on the mattress will slide or have a tendency to slide. In this posture, there is a large friction force, which rubs the patient's skin keratin, reduces the patient's pressure tolerance, and increases the risk of bedsores. There may also be a large shear force at the coccyx, which will also increase the risk of bedsores. The controller processes the angle data sent by the angle sensor. When in this posture, the controller can send a corresponding instruction to increase the inflation volume of the waist wedge-shaped airbag 5. Since the waist airbag is wedge-shaped, there will be an upward support reaction force. This support reaction force can reduce the vertical pressure of the patient's back and the mattress to a certain extent, thereby reducing the friction on the patient's back and the shear force at the coccyx, and playing a certain role in preventing bedsores.

It also includes: when the patient is in a supine position of 60-90°, according to the principles of ergonomics, the part of the human body that is under greater pressure is the buttocks. The controller processes the data transmitted by the angle sensor to determine that the back-lifting angle is within the range. The controller sends corresponding instructions to the solenoid valve that controls the buttocks airbag 4, and cooperates with the medical silent air pump to realize the action of the buttocks airbag 4. The buttocks airbag has a total of six strip airbags, and the opening and closing of the solenoid valve are used to realize the action of inflating three airbags and deflating three airbags. The air is inflated and deflated for 30 seconds, and the state is maintained for 2 minutes. The air is inflated and deflated alternately for 30 seconds, and the state is maintained for 2 minutes... This cycle is repeated in sequence to avoid pressure concentration on the buttocks and the chance of bedsores.

The present application provides an airbag support plate with a groove for placing the airbags on the airbag support plate; an integrally formed airbag layer is placed in the airbag groove, each airbag is provided with a separate air path for independent inflation and deflation operations, and the airbags are arranged in an array manner to take into account the pressure of various parts of the human body. The pressure sensor adopts the same array manner as the airbag to separately obtain the pressure value of each airbag point, and based on the pressure values of all the airbags, a difference algorithm is used to calculate whether there is a local high-pressure area in the airbag layer. The local high-pressure area is also a high-risk area for the occurrence of bedsores. If so, the corresponding airbag is controlled to perform a decompression operation to reduce the risk of bedsores.

It can be understood that the same or similar parts of the above embodiments can be referenced to each other, and the contents not described in detail in some embodiments can refer to the same or similar contents in other embodiments.

It should be noted that, in the description of the present invention, the terms "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance. In addition, in the description of the present invention, unless otherwise specified, the meaning of "plurality" refers to at least two.

Any process or method description in a flowchart or otherwise described herein may be understood to represent a module, segment or portion of code that includes one or more executable instructions for implementing the steps of a specific logical function or process, and the scope of the preferred embodiments of the present invention includes alternative implementations in which functions may not be performed in the order shown or discussed, including performing functions in a substantially simultaneous manner or in the reverse order depending on the functions involved, which should be understood by technicians in the technical field to which the embodiments of the present invention belong.

It should be understood that the various parts of the present invention can be implemented by hardware, software, firmware or a combination thereof. In the above-mentioned embodiments, a plurality of steps or methods can be implemented by software or firmware stored in a memory and executed by a suitable instruction execution system. For example, if implemented by hardware, as in another embodiment, it can be implemented by any one of the following technologies known in the art or their combination: a discrete logic circuit having a logic gate circuit for implementing a logic function for a data signal, a dedicated integrated circuit having a suitable combination of logic gate circuits, a programmable gate array (PGA), a field programmable gate array (FPGA), etc.

A person skilled in the art may understand that all or part of the steps in the method for implementing the above-mentioned embodiment may be completed by instructing related hardware through a program, and the program may be stored in a computer-readable storage medium, which, when executed, includes one or a combination of the steps of the method embodiment.

In addition, each functional unit in each embodiment of the present invention may be integrated into a processing module, or each unit may exist physically separately, or two or more units may be integrated into one module. The above-mentioned integrated module may be implemented in the form of hardware or in the form of a software functional module. If the integrated module is implemented in the form of a software functional module and sold or used as an independent product, it may also be stored in a computer-readable storage medium.

The storage medium mentioned above can be a read-only memory, a magnetic disk or an optical disk, etc.

In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

Although the embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations of the present invention. A person skilled in the art may change, modify, replace and vary the above embodiments within the scope of the present invention.

Claims (8)

1. A multi-modal pressure sore prevention mattress control system, the system comprising:

An airbag support plate: one surface of the air bag supporting plate is also provided with air bag grooves of a honeycomb array;

Airbag layer: the air bag layer consists of a plurality of air bag honeycomb arrays, corresponds to the air bag grooves of the air bag supporting plate one by one, and is fixedly arranged in the air bag grooves of the air bag supporting plate;

Each air bag in the air bag layer is provided with an air inlet and an air outlet, the air inlet and the air outlet are connected with an air pipe, an electromagnetic valve is arranged in the middle of the air pipe, one end of the electromagnetic valve is provided with an air pump, and the on-off of the air pipe is controlled through the electromagnetic valve so as to control the inflation and deflation of the air bag;

A diaphragm pressure sensor: the film pressure sensors are arranged on the air bag layer, are installed in a honeycomb array mode, are in one-to-one correspondence with air bags in the air bag layer and are used for collecting pressure data of each air bag in the air bag layer;

And (3) a controller: the controller is used for receiving the pressure data of the film pressure sensor, calculating whether a local high-pressure area exists in the air bag layer according to a preset difference algorithm, and if so, controlling the corresponding electromagnetic valve and the air pump to deflate the air bag in the local high-pressure area and inflating the air bag around the local high-pressure area.

2. The system of claim 1, wherein the system further comprises a controller configured to control the controller,

The air bag supporting plate comprises a first air bag supporting plate and a second air bag supporting plate, wherein the bottom of the first air bag supporting plate is connected with the top of the second air bag supporting plate through a rotating shaft, so that the first air bag supporting plate can rotate around a rotary shaft within a certain angle;

the length ratio of the first airbag support plate to the second airbag support plate is 1 to 1.5.

3. The system of claim 2, wherein the system further comprises a controller configured to control the controller,

Further comprises:

an angle sensor: the rotating shafts are arranged on the first air bag supporting plate and the second air bag supporting plate and are used for collecting the rotating angle of the first air bag supporting plate and sending the collected rotating angle of the first air bag supporting plate to the controller.

4. The system of claim 3, wherein the system further comprises a controller configured to control the controller,

The bottom of the first airbag supporting plate, which is close to the rotating shaft, is provided with a wedge-shaped waist airbag, and the top of the second airbag supporting plate, which is close to the rotating shaft, is provided with a plurality of strip-shaped hip airbags.

5. The system of claim 4, wherein the system further comprises a controller configured to control the controller,

The controller is also used for receiving the angle data of the angle sensor and controlling the waist air bag and the hip air bag to be inflated and deflated according to the angle data.

6. A method of multi-posture decubitus mattress control, the method being based on a multi-posture decubitus mattress control system of any one of claims 1-5, the method comprising:

Acquiring pressure data of each air bag in the air bag layer, processing all the pressure data by using an bubbling sequencing algorithm, arranging the pressure data according to a size sequence, calculating an average value of all the pressure data, and recording a maximum value and a minimum value in the pressure data;

Calculating the difference value between the maximum value and the minimum value in the pressure data, and comparing the difference value with the average value to obtain the ratio of the difference value to the average value;

Comparing the ratio with a preset ratio threshold, if the ratio is larger than the preset ratio threshold, a local high-pressure area exists, deflating the air bags in the local high-pressure area, and inflating peripheral air bags adjacent to the local high-pressure area;

And re-acquiring the pressure data of each air bag in the air bag layer, and repeating the steps until the ratio is smaller than or equal to a preset ratio threshold.

7. The method as recited in claim 6, further comprising:

acquiring the rotation angle of the first air bag supporting plate, and when the rotation angle is in a preset first rotation angle interval, performing inflation operation on the waist air bag.

8. The method as recited in claim 7, further comprising:

acquiring the rotation angle of the first airbag support plate, and controlling the plurality of strip-shaped hip airbags to be partially inflated and partially deflated when the rotation angle is in a preset second rotation angle interval;

The state of the plurality of strip-shaped buttock air bags is kept for a preset second time after the inflation and deflation of the plurality of strip-shaped buttock air bags are continuously carried out for a preset first time, then the original inflated air bags are controlled to be deflated, and the original deflated air bags are inflated, and are kept for a preset second time after the preset first time, and the inflation and deflation are sequentially and circularly carried out alternately.