Visual perception-based micro-hyperbaric chamber internal pressure adaptive control method and system

Abstract

The application discloses a micro-high-pressure oxygen cabin pressure self-adaptive control method and system based on visual perception, and the method comprises the following steps: constructing a distance gradient expression; if all users have corresponding change rate thresholds, determining the actual change rate of the micro-high-pressure oxygen cabin based on the types of the corresponding change rate thresholds of all users, and executing the next step in response to any user not having a corresponding change rate threshold; increasing or decreasing the pressure change rate at the air inlet, obtaining discomfort characteristics, calculating the standard change threshold corresponding to the user who has the discomfort characteristics if any user has the discomfort characteristics; and determining the relative change threshold corresponding to the user who does not have the discomfort characteristics. The application constructs a gradient mapping relationship between the oxygen cabin air inlet distance and the pressure change rate, realizes bidirectional accurate conversion between the air inlet pressure change rate and the user position pressure change rate, eliminates the problem that the pressure experiences of users at different distances are inconsistent, and greatly improves the accuracy of pressure regulation of the multi-person oxygen cabin.

Description

Technical Field

[0001] This application relates to the field of pressurization control of micro hyperbaric oxygen chambers, and more specifically, to a method and system for adaptive pressure control in micro hyperbaric oxygen chambers based on visual perception. Background Technology

[0002] The mechanism of a hyperbaric oxygen chamber is to create a pressurized and oxygen-rich environment by pumping in oxygen, thereby increasing the blood oxygen supply rate for users. However, the rate of pressure change during the pressurization or depressurization process of a hyperbaric oxygen chamber directly affects the user experience. Therefore, determining a better rate of pressure change to improve the user experience has become an important optimization direction.

[0003] However, existing methods for determining the rate of air pressure change have the following main problems: First, most methods only collect inlet pressure data to uniformly control the intake rate, without quantifying the spatial pressure distribution pattern formed by airflow diffusion within the cabin; second, existing adaptive control schemes are mostly adapted to single-person use, and are difficult to adapt to use scenarios where multiple people use the device simultaneously, where people are seated, or where the combination of people in the same cabin changes dynamically; third, some existing devices use wearable physiological sensors to collect human feedback signals, and wearable accessories increase the user's sense of restraint and reduce the user experience.

[0004] Therefore, existing technologies have shortcomings and urgently need improvement. Summary of the Invention

[0005] In view of the aforementioned problems, the purpose of this invention is to provide a visual perception-based adaptive pressure control method and system for micro hyperbaric oxygen chambers, to address the following issues in existing technologies: First, most existing systems only collect inlet pressure data to uniformly control the inlet rate, without quantifying the spatial pressure distribution patterns formed by airflow diffusion within the chamber; second, existing adaptive control schemes are mostly adapted to single-person use, making it difficult to adapt to usage scenarios involving multiple users simultaneously, varying seating positions, and dynamic changes in the combination of personnel within the chamber; third, some existing devices use wearable physiological sensors to collect human feedback signals, which can increase the user's sense of constraint and reduce the user experience.

[0006] The first aspect of this invention provides a visual perception-based adaptive pressure control method for a micro hyperbaric oxygen chamber, comprising: Step S1: Construct a distance gradient expression representing the relationship between the pressure change rate at the air inlet and the interval distance; Step S2: After pressurization or depressurization begins, in response to the existence of a corresponding rate of change threshold for all users, the actual rate of change corresponding to the micro hyperbaric oxygen chamber is determined based on the type of the rate of change threshold for all users. In response to the absence of a corresponding rate of change threshold for any user, step S3 is executed. Step S3: Increase or decrease the pressure change rate at the air inlet for the same duration as in step one and maintain it for a preset time. Obtain discomfort features based on visual perception. In response to any user exhibiting discomfort features, stop increasing the pressure change rate and obtain the pressure change rate at the air inlet. Determine the standard change threshold corresponding to the user exhibiting discomfort features based on the pressure change rate at the air inlet, the interval distance corresponding to the user exhibiting discomfort features, and the distance gradient expression. Step S4: Determine the relative change threshold for other users who do not exhibit discomfort based on the interval distance corresponding to other users who do not exhibit discomfort, the pressure change rate at the air inlet, and the distance gradient expression; The type of the rate of change threshold is either a standard rate of change threshold or a relative rate of change threshold. The interval distance is the distance between any position inside the micro hyperbaric oxygen chamber and the air inlet.

[0007] As a preferred technical solution for the visual perception-based adaptive pressure control method in a micro hyperbaric oxygen chamber, the process of constructing the distance gradient expression includes: Several pressure sensors were installed at the air inlet of the micro hyperbaric oxygen chamber and other locations. Start pressurization or depressurization, and simultaneously obtain the pressure change rate at the air inlet and the corresponding pressure change rate at other locations; Using the interval distance as the independent variable and the pressure change rate as the dependent variable, a decay function is fitted to obtain the distance gradient expression; the distance gradient expression satisfies the bidirectional conversion between the inlet pressure change rate and the user position pressure change rate.

[0008] As a preferred technical solution for the visual perception-based adaptive pressure control method in a micro hyperbaric oxygen chamber, the determination of the actual rate of change corresponding to the micro hyperbaric oxygen chamber based on the type of rate of change thresholds corresponding to all users includes: Users whose corresponding rate of change threshold is of the standard rate of change threshold type are categorized as Category 1 users, and users whose corresponding rate of change threshold is of the relative rate of change threshold type are categorized as Category 2 users. The corresponding rate of change threshold is determined based on the number of Category 1 users and Category 2 users.

[0009] As a preferred technical solution for the visual perception-based adaptive pressure control method in a micro hyperbaric oxygen chamber, the determination of the corresponding rate of change threshold based on the number of Class I and Class II users includes: Assuming all users are of the same type, the actual rate of change of the micro-hyperbaric oxygen chamber is determined based on the standard change threshold with the minimum absolute value and the distance gradient expression. In response to the existence of two types of users, the user with the lowest absolute value of the rate of change threshold is identified as the second type of user. The rate of change threshold of the second type of user with the lowest absolute value of the rate of change threshold is used as the initial rate of change. The pressure rate of change is gradually increased with a second step size until any user shows discomfort. The actual rate of change of the micro hyperbaric oxygen chamber is determined based on the type of user who shows discomfort. In response to the existence of two types of users, the user with the lowest absolute value of the rate of change threshold is classified as a type of user. The actual rate of change of the micro hyperbaric oxygen chamber is determined based on the standard rate of change threshold corresponding to the user with the smallest absolute value of the rate of change threshold and the distance gradient expression.

[0010] As a preferred technical solution for the visual perception-based adaptive pressure control method in a micro hyperbaric oxygen chamber, the determination of the actual rate of change of pressure in the micro hyperbaric oxygen chamber based on the user type exhibiting discomfort characteristics includes: If the user exhibiting discomfort is classified as a Class II user, their user type is changed to Class I. The difference between the pressure change rate at the air inlet and the first step length is determined as the actual change rate of the micro-hyperbaric oxygen chamber. Based on the difference between the pressure change rate at the air inlet and the first step length, the interval distance corresponding to this user, and the distance gradient expression, the standard change threshold corresponding to this user is determined and stored. If the user exhibiting discomfort symptoms belongs to a certain category, the difference between the pressure change rate at the air inlet and the first step length is determined as the actual change rate of the micro-hyperbaric oxygen chamber. Based on the difference between the pressure change rate at the air inlet and the first step length, the interval distance corresponding to the user exhibiting discomfort symptoms, and the distance gradient expression, a standard change threshold corresponding to the user exhibiting discomfort symptoms is determined. Based on the standard change threshold corresponding to the user exhibiting discomfort symptoms and the relative change thresholds corresponding to the other two categories of users, the relative change thresholds corresponding to the other two categories of users are adjusted.

[0011] As a preferred technical solution for the visual perception-based adaptive pressure control method in a micro hyperbaric oxygen chamber, the relative change thresholds for the other two types of users are adjusted based on the standard change thresholds corresponding to one type of user exhibiting discomfort characteristics and the relative change thresholds corresponding to the other two types of users. This includes: In response to the absolute value of the standard change threshold corresponding to the first type of user exhibiting discomfort characteristics being greater than or equal to the absolute value of the relative change threshold corresponding to the second type of user, the relative change threshold corresponding to the second type of user is adjusted to be equal to the standard change threshold corresponding to the first type of user exhibiting discomfort characteristics. In response to the fact that the absolute value of the standard change threshold corresponding to the first type of user exhibiting discomfort characteristics is less than the absolute value of the relative change threshold corresponding to the second type of user, the relative change threshold corresponding to the second type of user remains unchanged.

[0012] As a preferred technical solution for the adaptive pressure control method in a micro hyperbaric oxygen chamber based on visual perception, the discomfort features are obtained based on visual perception. The discomfort features include, but are not limited to: touching or picking the ears with the hands, covering the auricles with both hands, frequent swallowing, shaking the head from side to side, facial tension, frowning, and squeezing the mouth and nose.

[0013] As a preferred technical solution for the adaptive pressure control method in a micro hyperbaric oxygen chamber based on visual perception, the first step length is greater than the second step length.

[0014] As a preferred technical solution for the visual perception-based adaptive pressure control method in a micro hyperbaric oxygen chamber, the standard change threshold is determined based on the pressure change rate at the air inlet and the distance gradient expression, including: Obtain the interval distance corresponding to the user, substitute the difference between the real-time pressure change rate of the air inlet and the first step length, and the interval distance into the distance gradient expression to solve the real-time pressure change rate of the user's current position; The real-time pressure change rate is recorded as the user's corresponding standard change threshold and stored.

[0015] The present invention also provides a vision-based adaptive pressure control system for a micro hyperbaric oxygen chamber, comprising: The model building unit constructs a distance gradient expression that represents the relationship between the pressure change rate at the air inlet and the interval distance. The first pressure control unit, after starting to pressurize or depressurize, responds to the fact that all users have a corresponding rate of change threshold, determines the actual rate of change corresponding to the micro hyperbaric oxygen chamber based on the type of the rate of change threshold corresponding to all users, and responds to the fact that no user has a corresponding rate of change threshold, jumps to the second pressure control module. The second pressure control unit increases or decreases the pressure change rate at the air inlet by the first step length and maintains it for a preset time. It acquires discomfort characteristics based on visual perception. In response to any user exhibiting discomfort characteristics, it stops increasing the pressure change rate and acquires the pressure change rate at the air inlet. Based on the pressure change rate at the air inlet, the interval distance corresponding to the user exhibiting discomfort characteristics, and the distance gradient expression, it determines the standard change threshold corresponding to the user exhibiting discomfort characteristics. The calculation unit determines the relative change threshold for other users who do not exhibit discomfort based on the interval distance corresponding to other users who do not exhibit discomfort, the pressure change rate at the air inlet, and the distance gradient expression.

[0016] Compared with the prior art, the beneficial effects of the present invention are that it can promptly identify user discomfort during the pressurization or depressurization process after a user enters the hyperbaric oxygen chamber, and store the users experiencing discomfort and the pressure change rate they can adapt to. For users who do not have a corresponding stored pressure change rate threshold, a relative pressure change rate is temporarily calibrated based on the pressure change rates of other users. This relative pressure change rate provides a reference for subsequent adaptive pressure adjustment, thereby enabling the pressure increase rate in the hyperbaric oxygen chamber to adaptively adjust according to the user's position and the changes in other users entering the chamber together. This avoids the discomfort caused by excessively rapid pressurization or depressurization due to the use of the same pressure adjustment standard, or the excessively long time cycle caused by excessively slow pressurization or depressurization. It ensures both comfort and shortens the time required for pressurization or depressurization, thus improving the user experience. Attached Figure Description

[0017] Figure 1 The flowchart illustrates the steps of a visual perception-based adaptive pressure control method for a micro hyperbaric oxygen chamber provided by the present invention. Figure 2 The diagram shows the structural block diagram of the adaptive pressure control system for a micro hyperbaric oxygen chamber based on visual perception provided by the present invention. Detailed Implementation

[0018] To better understand the objectives, features, and advantages of this invention, the invention will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0019] Many specific details are set forth in the following description in order to provide a full understanding of the invention. However, the invention may also be practiced in other ways different from those described herein, and therefore the scope of protection of the invention is not limited to the specific embodiments disclosed below.

[0020] Figure 1 The flowchart illustrates the steps of the adaptive pressure control method for a micro hyperbaric oxygen chamber based on visual perception provided by the present invention.

[0021] like Figure 1 As shown, this invention discloses a visual perception-based adaptive pressure control method for micro hyperbaric oxygen chambers, comprising: Step S1: Construct a distance gradient expression representing the relationship between the pressure change rate at the air inlet and the interval distance; Step S2: After pressurization or depressurization begins, in response to the existence of a corresponding rate of change threshold for all users, the actual rate of change corresponding to the micro hyperbaric oxygen chamber is determined based on the type of the rate of change threshold for all users. In response to the absence of a corresponding rate of change threshold for any user, step S3 is executed. Step S3: Increase or decrease the pressure change rate at the air inlet for the same duration as in step one and maintain it for a preset time. Obtain discomfort features based on visual perception. In response to any user exhibiting discomfort features, stop increasing the pressure change rate and obtain the pressure change rate at the air inlet. Determine the standard change threshold corresponding to the user exhibiting discomfort features based on the pressure change rate at the air inlet, the interval distance corresponding to the user exhibiting discomfort features, and the distance gradient expression. Step S4: Determine the relative change threshold for other users who do not exhibit discomfort based on the interval distance corresponding to other users who do not exhibit discomfort, the pressure change rate at the air inlet, and the distance gradient expression; The type of change rate threshold is either a standard change threshold or a relative change threshold; The interval distance is the distance between any position inside the micro hyperbaric oxygen chamber and the air inlet.

[0022] Furthermore, those skilled in the art will understand that to achieve the desired effect, the hyperbaric oxygen chamber needs to be used multiple times. The patient's seating position and the other individuals entering the chamber may differ each time. On the other hand, the mechanism of action of the hyperbaric oxygen chamber is to increase the air pressure by introducing oxygen into it. However, as oxygen enters through the inlet, the air density and pressure around the inlet increase. The air pressure is higher around the inlet and lower further away. Air flows from the oxygen inlet away from it, gradually increasing the air pressure at other locations within the chamber. This results in a high pressure increase rate at the inlet and a slower rate of increase at other locations with increasing distance. Since the hyperbaric oxygen chamber is a closed environment with relatively constant moisture content and temperature, this phenomenon of a high pressure increase rate at the inlet and a slower rate of increase at other locations with increasing distance can be expressed using a distance gradient expression. By collecting a sufficient amount of data, this distance gradient expression can be trained.Those skilled in the art will understand that when the rate of air pressure change exceeds what is acceptable to humans, the resulting pressure imbalance inside and outside the tympanic membrane can cause discomfort, leading to actions such as swallowing or ear cleaning (i.e., the discomfort characteristics described in this invention). Therefore, this invention determines the actual rate of change of the micro-hyperbaric oxygen chamber based on whether the user possesses a rate of change threshold at the start of pressurization or depressurization. This rate of change threshold is categorized into standard and relative thresholds. When none of the users possess a rate of change threshold, the pressure change rate at the air inlet is gradually increased, and user discomfort characteristics are monitored. If any user A experiences discomfort, it indicates that user A's position is... The pressure change rate has reached the upper limit acceptable to user A. At this point, only the pressure change rate at the air inlet is available. Using the distance gradient expression, the pressure change rate at user A's location can be obtained and defined as the standard change threshold for user A. For other users, the upper limit of their acceptable air pressure change rate has not yet been reached. Using the pressure change rate at the air inlet combined with the distance gradient expression, the air pressure change rate at other users' locations can be obtained. This rate only indicates that other users can accept this rate, but it has not reached the upper limit. This current air pressure change rate is recorded as the relative change threshold. When all users have corresponding change rate thresholds, it is further divided into... There are three scenarios: The first scenario involves users with a standard change threshold (i.e., all are of the same user type). The rate of pressure change each person can tolerate is fixed, so the lowest one can be selected. However, this lowest standard change threshold represents the maximum pressure change rate that person can tolerate at that location. The pressure change rate at the air inlet needs to be determined by combining the distance gradient expression and the interval distance. The second scenario involves two user types, with the user having the lowest absolute value of the change rate threshold. Since the relative change threshold for the second user is not the maximum pressure change rate that the second user can tolerate, the pressure change rate can be gradually increased until any user... When users exhibit discomfort, two scenarios emerge. First, the discomfort is experienced by a group of users, who are already experiencing discomfort and cannot be further affected. However, the discomfort is still tolerable for group two users. In this case, the relative change threshold for group two users is adjusted to match the standard change rate threshold for group one users experiencing discomfort, gradually approaching the maximum pressure change rate tolerable for group two users. The third scenario involves two groups of users, but the group with the lowest absolute value is group one. In this case, the standard change threshold for group one users should be used as the benchmark, combined with the distance gradient expression and interval distance to determine the actual required pressure change rate at the air inlet (i.e., the actual change rate in this invention).In summary, this invention can promptly identify user discomfort during the pressurization or depressurization process upon entering a hyperbaric oxygen chamber. It stores information on users experiencing discomfort and their tolerance for pressure changes. For users without a corresponding stored pressure change threshold, a relative pressure change rate is temporarily calibrated based on the pressure change rates of other users. This relative rate serves as a reference for subsequent adaptive pressure adjustment. This allows the pressure increase within the hyperbaric oxygen chamber to adaptively adjust according to the user's position and the changes in other users entering the chamber. This avoids the discomfort caused by excessively rapid pressurization or depressurization due to using the same pressure adjustment standard, or the excessively long time required for pressurization or depressurization due to using the same standard. This ensures both comfort and reduces the time required for pressurization or depressurization, thus improving the user experience.

[0023] Furthermore, the process of constructing the distance gradient expression includes: Several pressure sensors were installed at the air inlet of the micro hyperbaric oxygen chamber and other locations. Start pressurization or depressurization, and simultaneously obtain the pressure change rate at the air inlet and the corresponding pressure change rate at other locations; By fitting a decay function with the interval distance as the independent variable and the pressure change rate as the dependent variable, the distance gradient expression is obtained; the distance gradient expression satisfies the bidirectional conversion between the inlet pressure change rate and the user position pressure change rate.

[0024] It should be noted that, in this embodiment of the invention, the selected pressure sensor is a high-precision miniature pressure sensor with an accuracy of 0.01 ATA, and is respectively set at several measurement points such as the air inlet, the front area of ​​the chamber, the middle area of ​​the chamber, the rear area of ​​the chamber, and the seats inside the micro hyperbaric oxygen chamber. Those skilled in the art will understand that the micro hyperbaric oxygen chamber can output different pressure change rates at multiple levels by controlling the air source. During the pressurization or depressurization phase, the real-time pressure change rate at the air inlet and the pressure data measured by each pressure sensor are simultaneously collected. Using the interval distance as the independent variable and the pressure change rate at the measurement point as the dependent variable, an exponential decay function is used to fit and generate a distance gradient expression. If the goodness of fit between the distance gradient expression and the data is greater than 99%, the fit is considered qualified; if it is less than or equal to 99%, the fitting is repeated. This part describes the data-based training process, which is existing technology and will not be elaborated further here. Since the internal geometric dimensions, air inlet structure and outlet form, internal airflow structure, internal partition structure, and exhaust valve installation position of each micro hyperbaric oxygen chamber are fixed at the factory, and since the micro hyperbaric oxygen chamber is a closed treatment chamber with a basically constant temperature and humidity during the treatment (the trace amounts of water vapor exhaled by the human body and the emitted temperature have a very low impact on the internal environment of the micro hyperbaric oxygen chamber and can be ignored here), the gradient expression will not change during a single use. It only needs to be recalibrated after major equipment overhaul or long-term seasonal environmental fluctuations. Therefore, the determination of the distance gradient expression once can be used for a long time without increasing the cumbersomeness of use due to the need for frequent calibration.

[0025] Furthermore, this invention obtains a distance gradient expression by collecting data from multiple points and fitting it, thereby accurately quantifying the spatial gradient law that the pressure change rate decreases with increasing distance, providing a foundation for subsequent adaptive pressure adjustment based on the user's corresponding interval distance and change rate threshold.

[0026] Furthermore, based on the type of change rate threshold corresponding to all users, the actual change rate corresponding to the micro-hyperbaric oxygen chamber is determined. Users whose corresponding change rate threshold type is the standard change threshold are categorized as Category 1 users, and users whose corresponding change rate threshold type is the relative change threshold are categorized as Category 2 users. The corresponding change rate threshold is determined based on the number of Category 1 and Category 2 users, including: Assuming all users are of the same type, the actual rate of change of the micro-hyperbaric oxygen chamber is determined based on the standard change threshold with the minimum absolute value and the distance gradient expression. In response to the existence of two types of users, the user with the lowest absolute value of the rate of change threshold is identified as the second type of user. The rate of change threshold of this second type of user is used as the initial rate of change. The pressure rate of change is gradually increased with a second step size until any user shows discomfort. The actual rate of change of the micro hyperbaric oxygen chamber is determined based on the type of user who shows discomfort. In response to the existence of two types of users, the user with the lowest absolute value of the rate of change threshold is classified as a type of user. The actual rate of change of the micro hyperbaric oxygen chamber is determined based on the standard rate of change threshold corresponding to the user with the smallest absolute value of the rate of change threshold and the distance gradient expression.

[0027] Furthermore, the actual rate of change in the micro-hyperbaric oxygen chamber was determined based on the type of user exhibiting discomfort symptoms, including: If the user exhibiting discomfort is classified as a Category II user, their user type is changed to Category I. The difference between the pressure change rate at the air inlet and the first step length is determined as the actual change rate of the micro-hyperbaric oxygen chamber. Based on the difference between the pressure change rate at the air inlet and the first step length, the interval distance corresponding to this user, and the distance gradient expression, the standard change threshold corresponding to this user is determined and stored. If the user exhibiting discomfort symptoms belongs to a certain category, the difference between the pressure change rate at the air inlet and the first step length is determined as the actual change rate of the micro-hyperbaric oxygen chamber. Based on the difference between the pressure change rate at the air inlet and the first step length, the interval distance corresponding to the user exhibiting discomfort symptoms, and the distance gradient expression, the standard change threshold corresponding to the user exhibiting discomfort symptoms is determined. Based on the standard change threshold corresponding to the user exhibiting discomfort symptoms and the relative change threshold corresponding to the other two categories of users, the relative change threshold corresponding to the other two categories of users is adjusted.

[0028] It should be noted that the value of the first step length is obtained based on big data or data analysis of several users. In this embodiment of the invention, the value of the first step length is 0.02 ATA / min. Each time the pressure change rate is increased by the first step length and maintained for 20 seconds, if no uncomfortable action is observed, the pressure change rate is increased again until uncomfortable characteristics appear. The pressure change rate obtained by subtracting the first step length from the pressure change rate when uncomfortable characteristics appear is determined as the standard change threshold for the user.

[0029] In detail, this invention divides three situations based on the completeness of user data. The user with the weakest tolerance is used as the constraint in the entire pressurization or depressurization process of the micro hyperbaric oxygen chamber. When all users have corresponding standard change thresholds, the system operates in a steady state. When there are relative change thresholds, rapid pressurization or depressurization or small-step probing is performed. This can prevent user discomfort caused by rapid pressurization while also reducing the time of pressurization or depressurization phases to improve the user experience.

[0030] Furthermore, based on the standard change threshold corresponding to the first type of users exhibiting discomfort characteristics and the relative change threshold corresponding to the other two types of users, the relative change threshold for the other two types of users is adjusted, including: In response to the absolute value of the standard change threshold corresponding to the first type of user exhibiting discomfort characteristics being greater than or equal to the absolute value of the relative change threshold corresponding to the second type of user, the relative change threshold corresponding to the second type of user is adjusted to be equal to the standard change threshold corresponding to the first type of user exhibiting discomfort characteristics. In response to the fact that the absolute value of the standard change threshold corresponding to the first type of user exhibiting discomfort characteristics is less than the absolute value of the relative change threshold corresponding to the second type of user, the relative change threshold corresponding to the second type of user remains unchanged.

[0031] Furthermore, discomfort features are obtained based on visual perception, including but not limited to: touching or picking at the ears with hands, covering the auricle with both hands, frequent swallowing, shaking the head from side to side, facial tension, frowning, and squeezing the mouth and nose.

[0032] Furthermore, the first step is longer than the second step.

[0033] It should be noted that the second step size is based on the existing relative change threshold for pressurization. At this point, the relative change threshold may already be very close to the user's standard change threshold. Therefore, the first step size cannot be used to rapidly increase the pressure change rate. Instead, a strategy of small step sizes and slow increases should be adopted. The specific value of the second compensation is determined based on the actual situation of the minimum step size that the micro-hyperbaric oxygen chamber can support and the relevant specifications of the micro-hyperbaric oxygen chamber. In this embodiment of the invention, the value of the second step size is 0.005 ATA / min. Based on full-screen multi-human key point detection, key points of the hands, ears, head, and facial features are extracted simultaneously to identify all seven types of discomfort features, including hand touching or picking the ears, covering the ears with both hands, frequent swallowing, head shaking from side to side, facial tension, frowning, and mouth and nose squeezing. The above process is a common technical means in the field of human motion acquisition. As long as it can achieve the technical effect of acquiring the user's discomfort features in the technical solution of this invention, the type of visual perception is not limited here.

[0034] Furthermore, based on the pressure change rate at the air inlet and the distance gradient expression, the corresponding standard change threshold is determined, including: Obtain the interval distance corresponding to the user, substitute the difference between the real-time pressure change rate of the air inlet and the first step length, and the interval distance into the distance gradient expression to solve the real-time pressure change rate of the user's current position; The real-time pressure change rate is recorded as the user's corresponding standard change threshold and stored.

[0035] Further, please refer to Figure 2 As shown, it is a structural block diagram of the adaptive pressure control system for a micro hyperbaric oxygen chamber based on visual perception, according to an embodiment of the present invention, including: The model building unit constructs a distance gradient expression that represents the relationship between the pressure change rate at the air inlet and the interval distance. The first pressure control unit, after starting to pressurize or depressurize, responds to the fact that all users have a corresponding rate of change threshold, determines the actual rate of change corresponding to the micro hyperbaric oxygen chamber based on the type of the rate of change threshold corresponding to all users, and responds to the fact that no user has a corresponding rate of change threshold, jumps to the second pressure control module. The second pressure control unit increases or decreases the pressure change rate at the air inlet by the first step length and maintains it for a preset time. It obtains discomfort characteristics based on visual perception. In response to any user exhibiting discomfort characteristics, it stops increasing the pressure change rate and obtains the pressure change rate at the air inlet. Based on the pressure change rate at the air inlet, the interval distance corresponding to the user exhibiting discomfort characteristics, and the distance gradient expression, it determines the standard change threshold corresponding to the user exhibiting discomfort characteristics. The calculation unit determines the relative change threshold for other users who do not exhibit discomfort based on the interval distance corresponding to other users who do not exhibit discomfort, the pressure change rate at the air inlet, and the distance gradient expression.

[0036] The information (including but not limited to standard change thresholds, relative change thresholds, etc.), data (including but not limited to data used for analysis, stored data, displayed data, etc.), and signals (including but not limited to signals transmitted between user terminals and other devices) involved in this application have all been authorized by the user or fully authorized by all parties, and the collection, use, and processing of related data must comply with the relevant laws, regulations, and standards of the relevant countries and regions. For example, the "standard change thresholds" and "relative change thresholds" involved in this disclosure were obtained under full authorization.

[0037] In the several embodiments provided in this application, it should be understood that the disclosed devices and methods can be implemented in other ways. The device embodiments described above are merely illustrative. For example, the division of units is only a logical functional division, and in actual implementation, there may be other division methods, such as: multiple units or components can be combined, or integrated into another system, or some features can be ignored or not executed. In addition, the coupling, direct coupling, or communication connection between the various components shown or discussed can be through some interfaces, and the indirect coupling or communication connection between devices or units can be electrical, mechanical, or other forms.

[0038] The units described above as separate components may or may not be physically separate. The components shown as units may or may not be physical units. They may be located in one place or distributed across multiple network units. Some or all of the units may be selected to achieve the purpose of this embodiment according to actual needs.

[0039] In addition, in the various embodiments of the present invention, each functional unit can be integrated into one processing unit, or each unit can be a separate unit, or two or more units can be integrated into one unit; the integrated unit can be implemented in hardware or in the form of hardware plus software functional units.

[0040] Those skilled in the art will understand that all or part of the steps of the above method embodiments can be implemented by hardware related to program instructions. The aforementioned program can be stored in a computer-readable storage medium. When the program is executed, it performs the steps of the above method embodiments. The aforementioned storage medium includes various media capable of storing program code, such as mobile storage devices, read-only memory (ROM), random access memory (RAM), magnetic disks, or optical disks.

[0041] Alternatively, if the integrated units of this invention are implemented as software functional modules and sold or used as independent products, they can also be stored in a computer-readable storage medium. Based on this understanding, the technical solutions of the embodiments of this invention, or the parts that contribute to the prior art, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute all or part of the methods described in the various embodiments of this invention. The aforementioned storage medium includes various media capable of storing program code, such as mobile storage devices, ROM, RAM, magnetic disks, or optical disks.

Claims

1. A method for adaptive pressure control in a micro hyperbaric oxygen chamber based on visual perception, characterized in that, include: Step S1: Construct a distance gradient expression representing the relationship between the pressure change rate at the air inlet and the interval distance; Step S2: After pressurization or depressurization begins, in response to the existence of a corresponding rate of change threshold for all users, the actual rate of change corresponding to the micro hyperbaric oxygen chamber is determined based on the type of the rate of change threshold for all users. In response to the absence of a corresponding rate of change threshold for any user, step S3 is executed. Step S3: Increase or decrease the pressure change rate at the air inlet for the same duration as in step one and maintain it for a preset time. Obtain discomfort features based on visual perception. In response to any user exhibiting discomfort features, stop increasing the pressure change rate and obtain the pressure change rate at the air inlet. Determine the standard change threshold corresponding to the user exhibiting discomfort features based on the pressure change rate at the air inlet, the interval distance corresponding to the user exhibiting discomfort features, and the distance gradient expression. Step S4: Determine the relative change threshold for other users who do not exhibit discomfort based on the interval distance corresponding to other users who do not exhibit discomfort, the pressure change rate at the air inlet, and the distance gradient expression; The type of the rate of change threshold is either a standard rate of change threshold or a relative rate of change threshold. The interval distance is the distance between any position inside the micro hyperbaric oxygen chamber and the air inlet.

2. The adaptive pressure control method for a micro hyperbaric oxygen chamber based on visual perception according to claim 1, characterized in that, The process of constructing the distance gradient expression includes: Several pressure sensors were installed at the air inlet of the micro hyperbaric oxygen chamber and other locations. Start pressurization or depressurization, and simultaneously obtain the pressure change rate at the air inlet and the corresponding pressure change rate at other locations; Using the interval distance as the independent variable and the pressure change rate as the dependent variable, a decay function is fitted to obtain the distance gradient expression; the distance gradient expression satisfies the bidirectional conversion between the inlet pressure change rate and the user position pressure change rate.

3. The adaptive pressure control method for a micro hyperbaric oxygen chamber based on visual perception according to claim 1, characterized in that, The determination of the actual rate of change corresponding to the micro-hyperbaric oxygen chamber based on the type of rate of change threshold corresponding to all users includes: Users whose corresponding rate of change threshold is of the standard rate of change threshold type are categorized as Category 1 users, and users whose corresponding rate of change threshold is of the relative rate of change threshold type are categorized as Category 2 users. The corresponding rate of change threshold is determined based on the number of Category 1 users and Category 2 users.

4. The adaptive pressure control method for a micro hyperbaric oxygen chamber based on visual perception according to claim 3, characterized in that, The determination of the corresponding rate of change threshold based on the number of users in category one and category two includes: Assuming all users are of the same type, the actual rate of change of the micro-hyperbaric oxygen chamber is determined based on the standard change threshold with the minimum absolute value and the distance gradient expression. In response to the existence of two types of users, the user with the lowest absolute value of the rate of change threshold is identified as the second type of user. The rate of change threshold of the second type of user with the lowest absolute value of the rate of change threshold is used as the initial rate of change. The pressure rate of change is gradually increased with a second step size until any user shows discomfort. The actual rate of change of the micro hyperbaric oxygen chamber is determined based on the type of user who shows discomfort. In response to the existence of two types of users, the user with the lowest absolute value of the rate of change threshold is classified as a type of user. The actual rate of change of the micro hyperbaric oxygen chamber is determined based on the standard rate of change threshold corresponding to the user with the smallest absolute value of the rate of change threshold and the distance gradient expression.

5. The adaptive pressure control method for a micro hyperbaric oxygen chamber based on visual perception according to claim 4, characterized in that, The determination of the actual rate of change of the micro-hyperbaric oxygen chamber based on the type of user exhibiting discomfort characteristics includes: If the user exhibiting discomfort is classified as a Class II user, their user type is changed to Class I. The difference between the pressure change rate at the air inlet and the first step length is determined as the actual change rate of the micro-hyperbaric oxygen chamber. Based on the difference between the pressure change rate at the air inlet and the first step length, the interval distance corresponding to this user, and the distance gradient expression, the standard change threshold corresponding to this user is determined and stored. If the user exhibiting discomfort symptoms belongs to a certain category, the difference between the pressure change rate at the air inlet and the first step length is determined as the actual change rate of the micro-hyperbaric oxygen chamber. Based on the difference between the pressure change rate at the air inlet and the first step length, the interval distance corresponding to the user exhibiting discomfort symptoms, and the distance gradient expression, a standard change threshold corresponding to the user exhibiting discomfort symptoms is determined. Based on the standard change threshold corresponding to the user exhibiting discomfort symptoms and the relative change thresholds corresponding to the other two categories of users, the relative change thresholds corresponding to the other two categories of users are adjusted.

6. The adaptive pressure control method for a micro hyperbaric oxygen chamber based on visual perception according to claim 5, characterized in that, The adjustment of the relative change thresholds for the other two user groups based on the standard change threshold for one type of user exhibiting discomfort characteristics and the relative change thresholds for the other two user groups includes: In response to the absolute value of the standard change threshold corresponding to the first type of user exhibiting discomfort characteristics being greater than or equal to the absolute value of the relative change threshold corresponding to the second type of user, the relative change threshold corresponding to the second type of user is adjusted to be equal to the standard change threshold corresponding to the first type of user exhibiting discomfort characteristics. In response to the fact that the absolute value of the standard change threshold corresponding to the first type of user exhibiting discomfort characteristics is less than the absolute value of the relative change threshold corresponding to the second type of user, the relative change threshold corresponding to the second type of user remains unchanged.

7. The adaptive pressure control method for a micro hyperbaric oxygen chamber based on visual perception according to claim 6, characterized in that, The discomfort features are obtained based on visual perception, including but not limited to: touching or picking at the ears with the hands, covering the auricle with both hands, swallowing frequently, shaking the head from side to side, facial tension, frowning, and squeezing the mouth and nose.

8. The adaptive pressure control method for a micro hyperbaric oxygen chamber based on visual perception according to claim 7, characterized in that, The length of the first step is greater than the length of the second step.

9. The adaptive pressure control method for a micro hyperbaric oxygen chamber based on visual perception according to claim 1, characterized in that, The standard change threshold is determined based on the pressure change rate at the air inlet and the distance gradient expression, including: Obtain the interval distance corresponding to the user, substitute the difference between the real-time pressure change rate of the air inlet and the first step length, and the interval distance into the distance gradient expression to solve the real-time pressure change rate of the user's current position; The real-time pressure change rate is recorded as the user's corresponding standard change threshold and stored.

10. A vision-based adaptive pressure control system for a micro hyperbaric oxygen chamber, used to implement the vision-based adaptive pressure control method for a micro hyperbaric oxygen chamber as described in any one of claims 1-9, characterized in that, include: The model building unit constructs a distance gradient expression that represents the relationship between the pressure change rate at the air inlet and the interval distance. The first pressure control unit, after starting to pressurize or depressurize, responds to the fact that all users have a corresponding rate of change threshold, determines the actual rate of change corresponding to the micro hyperbaric oxygen chamber based on the type of the rate of change threshold corresponding to all users, and responds to the fact that no user has a corresponding rate of change threshold, jumps to the second pressure control module. The second pressure control unit increases or decreases the pressure change rate at the air inlet by the first step length and maintains it for a preset time. It acquires discomfort characteristics based on visual perception. In response to any user exhibiting discomfort characteristics, it stops increasing the pressure change rate and acquires the pressure change rate at the air inlet. Based on the pressure change rate at the air inlet, the interval distance corresponding to the user exhibiting discomfort characteristics, and the distance gradient expression, it determines the standard change threshold corresponding to the user exhibiting discomfort characteristics. The calculation unit determines the relative change threshold for other users who do not exhibit discomfort based on the interval distance corresponding to other users who do not exhibit discomfort, the pressure change rate at the air inlet, and the distance gradient expression.

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