A method and control system for adaptive pressure regulation of a life raft

Abstract

The present application relates to the technical field of process control, in particular to a kind of lifesaving air cushion pressure self-adapting adjustment method and control system, comprising the following steps: obtaining the pressure time series data of lifesaving air cushion multiple air chambers and the execution state of inflator, inlet valve, exhaust valve, calculate pressure variation rate, pressure deviation and air chamber pressure difference, identify work stage in combination with execution state, generate target pressure correction amount, determine inlet, exhaust or keep priority according to zoning adjustment condition and control inflator, inlet valve and exhaust valve action, according to the pressure feedback after action State switching.The present application makes pressure regulation basis correspond to pressure process, air chamber distribution and execution state through work stage identification, air chamber pressure difference linkage, target pressure correction and execution feedback, and forms zoning limit inlet, zoning limit exhaust or keep processing when pressure change direction is inconsistent or pressure signal is missing.

Description

Technical Field

[0001] This invention relates to the field of process control technology, and in particular to a method and control system for adaptive adjustment of the pressure of a rescue air cushion. Background Technology

[0002] In the field of process control technology, signal acquisition, transmission, comparison, calculation, and execution control are carried out around process variables such as pressure, flow rate, displacement, and time of the controlled object. Sensors acquire the field status, which is then sent to the controller via a wired link or control bus. The controller issues action commands to actuators such as pumps, valves, and motors based on preset thresholds, timing conditions, or feedback signals, and records the operating status. Traditional adaptive pressure adjustment methods and control systems for rescue airbags refer to technologies that control the internal pressure of the airbag during inflation, standby, and pressurization. Generally, pressure sensors acquire pressure signals from each air chamber, which are compared and judged in conjunction with the operating status of the inflator, valve opening and closing status, and preset pressure ranges. The inflator, inlet valve, or exhaust valve is then driven according to the control sequence, and the pressure record and execution status are stored in the controller.

[0003] Traditional rescue airbag pressure control relies primarily on preset pressure ranges. The controller triggers the inflator, intake valve, and exhaust valve based on the pressure of a single air chamber. The continuity of pressure changes during the instantaneous pressurization and recovery process is not reflected in a single sampling comparison. The pressure difference distribution between multiple air chambers and the linkage of actuator states are insufficient. The standby hold and the instantaneous pressurization and recovery phases use similar control conditions, which can easily lead to discrepancies between the intake and exhaust sequence and the real-time pressurization state. Pressure records are also difficult to reflect feedback deviations after the action. Summary of the Invention

[0004] The purpose of this invention is to provide a method and control system for adaptive pressure adjustment of a rescue air cushion, which enables the rescue air cushion to form a staged pressure adjustment basis based on the pressure sequence changes of multiple air chambers, the pressure difference between air chambers and the status of the actuators during the inflation, standby, pressure response and post-pressure recovery processes. Through air intake, exhaust, holding and feedback switching control, the multi-chamber pressure adjustment process corresponds to the real-time pressure state.

[0005] To achieve the above objectives, the present invention provides a method for adaptive pressure adjustment of a rescue air cushion, comprising the following steps: acquiring pressure time-series data of multiple air chambers of the rescue air cushion and the execution status of the inflator, inlet valve, and exhaust valve; calculating the pressure change rate, pressure deviation, and inter-chamber pressure difference of each air chamber based on the pressure time-series data, and identifying the inflation preparation stage, standby holding stage, pressure response stage, or post-pressure recovery stage based on the execution status; generating a target pressure correction amount for each air chamber based on the identified working stage, pressure deviation, and inter-chamber pressure difference; and determining zoned adjustment conditions based on the target pressure correction amount, inter-chamber pressure difference, and inflator operating status. The zone adjustment conditions include the criteria for determining the air chamber zones that require intake adjustment, exhaust adjustment, or maintenance adjustment. When the target pressure correction, the pressure difference between air chambers, and the operating status of the inflator meet the zone adjustment conditions, the intake, exhaust, or maintenance priority of each air chamber is determined, and the inflator, intake valve, and exhaust valve are controlled according to the priority. The expected pressure change direction is determined based on the target pressure correction and the intake, exhaust, or maintenance action of the corresponding air chamber. The real-time pressure change direction is compared with the expected pressure change direction based on the pressure time sequence data after the action. When the comparison is inconsistent or the pressure signal is missing, the corresponding air chamber is switched to a restricted intake, restricted exhaust, or maintenance state.

[0006] Furthermore, when acquiring the pressure timing data and execution status, the output values ​​of the pressure sensors arranged in each air chamber are read according to the same sampling period, and the sampling time, air chamber identifier and pressure value are combined to form a single air chamber pressure record; at the same time, the start-stop status of the inflator, the opening and closing status of the inlet valve and the opening and closing status of the exhaust valve are written into the execution status record corresponding to the single air chamber pressure record, so that the pressure timing data and execution status are aligned according to the sampling time.

[0007] Furthermore, when validating the single-chamber pressure record, the pressure values ​​of adjacent sampling times in the same chamber are continuously compared. When the pressure value is missing or the pressure difference between adjacent sampling times exceeds the preset jump boundary, the single-chamber pressure record of the corresponding sampling time is marked as a record to be reviewed. When the record to be reviewed has a corresponding execution status record, the record to be reviewed is retained and its participation in the pressure change rate calculation is restricted. When the record to be reviewed does not have a corresponding execution status record, the pressure sensor output value of the corresponding chamber is reread.

[0008] Furthermore, when calculating the pressure change rate, pressure deviation, and inter-chamber pressure difference, adjacent pressure values ​​of the same chamber are read according to the sampling time, and the change in the adjacent pressure values ​​is associated with the corresponding sampling interval to generate the pressure change rate; the current pressure value is compared with a preset reference pressure range to generate the pressure deviation; and the current pressure value of the target chamber is compared with the current pressure value of the adjacent chamber or the same group of chambers to generate the inter-chamber pressure difference.

[0009] Furthermore, when identifying the inflation preparation stage, standby holding stage, pressure response stage, or pressure recovery stage, the pressure change rate is first compared with the stage change threshold, then the pressure change duration is compared with the stage determination time window, and the execution status is read. When the pressure change rate meets the stage change threshold and the pressure change duration meets the stage determination time window, it is identified as the pressure response stage. When the pressure change rate does not meet the stage change threshold and the pressure value is within the reference pressure range, it is identified as the standby holding stage.

[0010] Furthermore, when generating the target pressure correction amount, the identified working stage, pressure deviation of each chamber, and inter-chamber pressure difference are read. When the working stage is a standby holding stage, the target pressure correction amount is limited by the pressure deviation. When the working stage is a pressure response stage or a pressure recovery stage, the target pressure correction amount is jointly limited by the pressure deviation and the inter-chamber pressure difference. When the target pressure correction amount is jointly limited by the pressure deviation and the inter-chamber pressure difference, the deviation direction of the current pressure value of the target chamber relative to the reference pressure range is first determined, and then the pressure difference direction between the target chamber and adjacent chambers or chambers in the same group is determined. When the deviation direction is consistent with the pressure difference direction, the correction amount corresponding to the inter-chamber pressure difference is superimposed on the correction amount corresponding to the pressure deviation. When the deviation direction is inconsistent with the pressure difference direction, the target pressure correction amount is generated according to the correction amount corresponding to the pressure deviation.

[0011] Furthermore, when determining the intake, exhaust, or hold priority of each chamber, the target pressure correction of each chamber is first compared, followed by the inter-chamber pressure difference and pressure change rate. When the target pressure correction of a chamber meets the intake conditions and the inflator is running, the corresponding chamber is included in the intake priority sequence. When the target pressure correction of a chamber meets the exhaust conditions, the corresponding chamber is included in the exhaust priority sequence. When the target pressure correction of a chamber does not meet either the intake or exhaust conditions, the corresponding chamber is included in the hold sequence. The inflator and intake valve are controlled according to the intake priority sequence, and the exhaust valve is controlled according to the exhaust priority sequence. Pressure timing data is read in the next sampling cycle after a single action. When the real-time pressure change direction after the action is consistent with the expected pressure change direction, the current priority control rule is maintained. When the real-time pressure change direction after the action is inconsistent with the expected pressure change direction, or when the pressure signal of the corresponding chamber is missing, the corresponding chamber is switched to a restricted intake, restricted exhaust, or hold state.

[0012] This invention also provides a pressure adaptive adjustment control system for a rescue air cushion. This control system supports the aforementioned method and includes pressure sensors arranged in multiple air chambers, an inflator communicating with each air chamber, an inlet valve and an exhaust valve connected to each air chamber, a storage unit, and a controller. The pressure sensors send pressure timing data to the controller, and the storage unit stores the pressure timing data, stage determination rules, target pressure correction rules, and execution records. The controller generates a pressure change rate, pressure deviation, and inter-chamber pressure difference based on the pressure timing data and execution records, identifies the working stage, and generates a target pressure correction amount. When the target pressure correction amount, inter-chamber pressure difference, and inflator operating status meet the zone adjustment conditions, the controller sends control commands arranged according to air chamber priority to the inflator, inlet valve, and exhaust valve, and switches the corresponding air chamber to restricted intake, restricted exhaust, or maintained state based on the pressure feedback after the action.

[0013] Compared with the prior art, the advantages and positive effects of the present invention are as follows: In this invention, by acquiring multiple chamber pressure time-series data and execution status, and identifying the working stage by pressure change rate, pressure deviation, and inter-chamber pressure difference, the pressure regulation basis is changed from single-point threshold comparison to stage-by-stage linkage judgment; the target pressure correction amount and the air compressor operating status jointly limit the priority of air intake, exhaust, or holding, so that the valve action sequence corresponds to the chamber pressure state; the pressure feedback after the action is used to verify the real-time pressure change direction, and when the comparison is inconsistent or the pressure signal is missing, the air intake restriction, exhaust restriction, or holding state is switched, so that the stage differences and chamber correlation information under fixed interval control enter the control closed loop, so that subsequent control has a feedback correction basis. Attached Figure Description

[0014] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0015] Figure 1 This is the main flowchart of the adaptive pressure adjustment of the rescue air cushion of the present invention; Figure 2 This is a data flow diagram showing the alignment of pressure timing data acquisition and execution status in this invention; Figure 3 This is a logic diagram for identifying the working stages of the present invention; Figure 4 A logic diagram for generating the target pressure correction amount of this invention; Figure 5 This is a closed-loop diagram of priority control and pressure feedback in this invention. Detailed Implementation

[0016] The following is combined with Figure 1 The newly added accompanying drawings illustrate the technical solutions described in this invention. The embodiments of this invention revolve around the field of process control technology. Pressure acquisition, state identification, target correction, execution control, and feedback switching in subsequent processes are all described as continuous control links in the pressure regulation process of a rescue air cushion. In subsequent embodiments, multiple air chambers of a rescue air cushion refer to a set of air chambers within the rescue air cushion capable of acquiring pressure independently and receiving intake, exhaust, or hold control respectively; pressure timing data refers to air chamber pressure sampling records arranged according to sampling time; execution state refers to the inflator start / stop state, intake valve open / closed state, and exhaust valve open / closed state; pressure change rate, pressure deviation, and inter-chamber pressure difference serve as intermediate data for stage identification, target pressure correction, and zoned adjustment, respectively; the target pressure correction amount is used to represent the pressure regulation requirement of the corresponding air chamber relative to the current working stage; the intake priority sequence, exhaust priority sequence, and hold sequence are used to receive mutually exclusive control results from different air chambers. In the context of process control, the above data items correspond to the controlled object state quantity, intermediate judgment quantity, control target correction quantity, and execution result feedback quantity, respectively, enabling the controller to make judgments and outputs along the same pressure regulation chain.

[0017] Example 1

[0018] Please see Figures 1 to 5 This embodiment provides a method for adaptive pressure adjustment of a rescue air cushion. This embodiment uses the pressure time-series data of multiple air chambers of the rescue air cushion as input, and the inflator, inlet valve, and outlet valve as the execution objects. A staged control chain is formed by the pressure change trend, the pressure relationship between air chambers, and the execution status, creating a continuous closed loop between input detection, status judgment, target correction, execution control, and feedback switching. This continuous closed loop belongs to the acquisition, comparison, adjustment, execution, and feedback link in process control, enabling the pressure adjustment process to advance cyclically around the real-time pressure status.

[0019] S1: Obtain the pressure timing data of multiple air chambers of the rescue air cushion and the execution status of the inflator, air intake valve, and air exhaust valve.

[0020] In S1, each chamber is equipped with a pressure sensor capable of outputting a pressure value. The controller reads the output values ​​of each pressure sensor according to a preset sampling period. After receiving the pressure sensor output values, the controller assembles a single-chamber pressure record with the sampling time, chamber identifier, and pressure value as fields. The chamber identifier is used to distinguish different chambers, the sampling time is used to maintain the temporal arrangement of pressure values, and the pressure value is used in subsequent calculations of pressure change rate, pressure deviation, and inter-chamber pressure difference. The single-chamber pressure record is entered into the controller's storage area according to the sampling time, forming the pressure time-series data corresponding to each chamber. This sampling process is the process variable acquisition process in process control. The pressure value, as the acquired process variable, enters the controller, providing the input basis for subsequent closed-loop control.

[0021] S111: When reading the pressure sensor output value, the controller records the current sampling time for each air chamber and places the pressure values ​​of different air chambers at the same sampling time into the same sampling batch. If the pressure value of a certain air chamber is not returned at the current sampling time, the controller retains the sampling time and air chamber identifier, and sets the pressure value field to a missing state, so that subsequent validity verification can identify the missing pressure signal. After the sampling batch is completed, the controller reads the start / stop status of the inflator, the opening / closing status of each inlet valve, and the opening / closing status of each exhaust valve to form an execution status record corresponding to the pressure sampling batch.

[0022] S112, the execution status record includes whether the inflator is running, whether the inlet valve is open, whether the exhaust valve is open, and the sampling time corresponding to the execution status record. The controller aligns the execution status record with the single-chamber pressure record according to the sampling time. If there are single-chamber pressure records for multiple chambers at the same sampling time, the same execution status record is used as the execution background for the same sampling batch. Through the above alignment, it is possible to distinguish whether the pressure change comes from the air cushion compression process or from the execution action of the inlet valve, exhaust valve, or inflator during the subsequent identification of the working phase. This time alignment method is used to establish a same-period correspondence between the sampling status and the execution status in process control, avoiding misjudging the pressure change caused by the action of the actuator as a simple external pressure change.

[0023] S113, when validating the single-chamber pressure record, the controller reads the pressure values ​​of adjacent sampling times for the same chamber and compares the pressure difference between adjacent sampling times. If the current pressure value is missing, or the pressure difference between adjacent sampling times exceeds a preset jump boundary, the controller marks the single-chamber pressure record for the corresponding sampling time as a record to be reviewed. The record to be reviewed is not directly used as the sole basis for the effective pressure change trend, but is further correlated with the execution status record for judgment.

[0024] S114, when a corresponding execution status record exists for the record to be reviewed, and the execution status record can indicate that there were changes in the operation of the inflator (start / stop), intake valve (open / close), or exhaust valve (open / close) during the current sampling time, the controller retains the record to be reviewed and restricts its participation in the pressure change rate calculation. In this case, the record to be reviewed is retained as status observation data after the execution action. Through this processing, a traceable correspondence is established between missing pressure signals, sampling jumps, and changes in execution status. This review process belongs to the input signal reliability processing in process control, used to limit which sampled values ​​can be included in subsequent process variable change trend calculations.

[0025] S2 calculates the pressure change rate, pressure deviation, and pressure difference between each chamber based on the pressure time series data, and identifies the inflation preparation stage, standby holding stage, pressure response stage, or pressure recovery stage in conjunction with the execution status.

[0026] In S2, the controller takes validated pressure time-series data as input, reads adjacent pressure values ​​in the same chamber according to the sampling time, and associates the change in adjacent pressure values ​​with the corresponding sampling interval to generate a pressure change rate. The pressure change rate is used to represent the pressure change trend along the time direction. The controller then reads the current pressure value and a preset reference pressure range, converting the relationship between the current pressure value being higher than, lower than, or within the reference pressure range into a pressure deviation. The inter-chamber pressure difference is formed by comparing the current pressure value of the target chamber with the current pressure values ​​of adjacent chambers or chambers in the same group. The correspondence between the target chamber and adjacent chambers or chambers in the same group is determined by the chamber layout. In process control, the pressure change rate, pressure deviation, and inter-chamber pressure difference are used to describe the change trend of process variables, the deviation of process variables from the set range, and the distribution state among multiple controlled areas, respectively.

[0027] In step S211, the controller first reads the pressure change rate and compares it with a stage change threshold. The stage change threshold distinguishes whether the pressure change meets the conditions required for stage identification. If the pressure change rate meets the stage change threshold, the controller continues to compare the pressure change duration with the stage determination time window; if the pressure change duration meets the stage determination time window, the controller identifies the current state as a pressure response stage. The identification result of the pressure response stage serves as the input for generating the subsequent target pressure correction. This decision sequence reflects the stage determination logic in process control: first trend judgment, then continuity confirmation.

[0028] S212, if the pressure change rate does not meet the stage change threshold, the controller continues to read the comparison result between the current pressure value and the reference pressure range. When the pressure value is within the reference pressure range, and the execution status does not show that the inflator, intake valve, or exhaust valve is in a pressure-changing action state, the controller identifies the current state as the standby holding stage. When the pressure value has not yet entered the reference pressure range, and the inflator is in the running state or the intake valve is in the open state, the controller identifies the current state as the inflation preparation stage. When the pressure change rate drops below the stage change threshold, and the pressure value still deviates from the reference pressure range, the controller identifies the current state as the pressurized recovery stage.

[0029] S213, if there are conflicts in the stage identification results of different chambers within the same sampling batch, the controller prioritizes the chambers that meet the stage change threshold and whose duration meets the stage determination time window, and performs consistency verification between the working stages of chambers in the same group or adjacent chambers and the priority identification objects. If chambers in the same group or adjacent chambers do not meet the same stage condition, the working stage of each chamber is retained, and the corresponding working stage is used when generating the subsequent target pressure correction. Through this process, the multi-chamber state judgment will not be directly overridden by the short-term pressure change of a single chamber. This consistency verification is used to handle the state differences between controlled objects in multiple regions in process control, avoiding the instantaneous process variable changes in a single region from dominating the control stages of all chambers.

[0030] S3 generates the target pressure correction for each chamber based on the identified working stage, pressure deviation, and inter-chamber pressure difference.

[0031] In S3, the controller takes the operating stage, pressure deviation, and inter-chamber pressure difference as inputs, and generates a target pressure correction value according to the stage conditions corresponding to the current chamber. The target pressure correction value does not use a fixed single pressure difference as the output; instead, it first determines the current operating stage, and then selects whether the pressure deviation participates alone, or whether the pressure deviation and inter-chamber pressure difference participate together, based on the operating stage. The target pressure correction value serves as the basis for determining the priority of subsequent intake, exhaust, or maintenance. In process control, the target pressure correction value corresponds to the dynamic correction result of the control objective, used to convert the collected process variable states into control data that can be used by the actuators to respond.

[0032] S311, when the operating phase is the standby holding phase, the controller limits the target pressure correction amount to the pressure deviation. If the current pressure value is within the reference pressure range, the target pressure correction amount corresponds to the holding state; if the current pressure value is below the reference pressure range, the target pressure correction amount corresponds to the intake direction; if the current pressure value is above the reference pressure range, the target pressure correction amount corresponds to the exhaust direction. During the standby holding phase, the pressure difference between the air chambers is only recorded as a status in the storage area and does not change the direction of the target pressure correction amount.

[0033] S312, when the operating phase is the pressure response phase or the post-pressure recovery phase, the controller uses both the pressure deviation and the inter-chamber pressure difference to define the target pressure correction. The controller first determines the direction of deviation of the current pressure value of the target chamber from the reference pressure range, and then determines the direction of the pressure difference between the target chamber and adjacent or grouped chambers. When the deviation direction aligns with the pressure difference direction, the controller adds the correction corresponding to the inter-chamber pressure difference to the correction corresponding to the pressure deviation, generating the target pressure correction. When the deviation direction does not align with the pressure difference direction, the controller generates the target pressure correction according to the correction corresponding to the pressure deviation, and retains the inter-chamber pressure difference as a reference for subsequent priority ranking. This process ensures that the setting correction in process control is no longer determined solely by the pressure deviation of a single chamber, but rather by considering the pressure distribution relationship between adjacent or grouped chambers.

[0034] S313: After the target pressure correction is generated, the controller writes the chamber identifier, operating stage, pressure deviation, inter-chamber pressure difference, target pressure correction, and generation time into the target correction record. The target correction record is retrieved by S4 to determine whether a chamber enters the intake priority sequence, exhaust priority sequence, or hold sequence. If the target correction record for a chamber cannot be generated due to a missing pressure signal, the controller does not directly include that chamber in the intake priority sequence or exhaust priority sequence, but retains the missing state for feedback switching by S5.

[0035] S4, when the target pressure correction, inter-chamber pressure difference and inflator operating status meet the zone adjustment conditions, determine the intake, exhaust or maintenance priority of each chamber, and control the operation of the inflator, intake valve and exhaust valve according to the priority.

[0036] In step S4, the controller reads the target pressure correction for each chamber, the inter-chamber pressure difference, the pressure change rate, and the inflator's operating status. The controller first compares the target pressure correction for each chamber, then compares the inter-chamber pressure difference and the pressure change rate. The target pressure correction is used to determine whether to initiate, exhaust, or maintain the direction of air intake; the inter-chamber pressure difference is used to distinguish the adjustment sequence of different chambers under unidirectional adjustment requirements; the pressure change rate is used to determine whether the current pressure change is still in a rapid change process; and the inflator's operating status is used to determine whether an intake action can be executed immediately. This step combines the generation of control variables with the status of execution resources in process control, ensuring that the control output depends not only on the pressure deviation but also on the availability of the execution components.

[0037] S411, when the target pressure correction for a given air chamber meets the intake conditions and the inflator is running, the controller adds the corresponding air chamber to the intake priority sequence. If multiple air chambers simultaneously meet the intake conditions, the controller determines the first priority criterion based on the deviation of the target pressure correction, the second priority criterion based on the pressure difference between air chambers, and the third priority criterion based on the pressure change rate. After sorting, the controller opens the corresponding intake valves sequentially according to the intake priority sequence, and keeps intake valves not currently in the execution position closed or in their original state.

[0038] S412, when the target pressure correction for a chamber meets the exhaust conditions, the controller adds the corresponding chamber to the exhaust priority sequence. If multiple chambers simultaneously meet the exhaust conditions, the controller determines the exhaust order based on the target pressure correction, the pressure difference between chambers, and the rate of pressure change. The controller controls the corresponding exhaust valve to open according to the exhaust priority sequence and records the exhaust valve opening time, corresponding chamber identifier, and execution direction in the execution status record. The exhaust priority sequence and the intake priority sequence are executed mutually exclusively to prevent the same chamber from simultaneously entering intake and exhaust actions within the same control cycle. This mutually exclusive control relationship ensures that the process control output has a clear execution direction within the same control cycle.

[0039] S413, when the target pressure correction for a chamber does not meet the intake and exhaust conditions, the controller adds the corresponding chamber to the holding sequence. Chambers in the holding sequence do not trigger new intake or exhaust valve actions; the controller only records the holding status and waits for pressure feedback in the next sampling cycle. If the inflator is not running but a chamber meets the intake conditions, the controller can retain the corresponding chamber in the intake priority state and add it to the intake priority sequence only after the inflator is running and the conditions are met. This process ensures that the executed actions are synchronized with the real-time operating status of the inflator.

[0040] S5 compares the real-time pressure change direction with the expected pressure change direction based on the pressure timing data after the action. When the comparison is inconsistent or the pressure signal is missing, the corresponding air chamber is switched to a state of restricted intake, restricted exhaust, or maintenance.

[0041] In S5, the controller reads the pressure timing data in the next sampling cycle after a single action and compares the pressure value after the action with the pressure value before the action to form the real-time pressure change direction. The expected pressure change direction is determined by the intake priority sequence or exhaust priority sequence in S4; if the corresponding chamber performs an intake action, the expected pressure change direction is the pressure increase direction; if the corresponding chamber performs an exhaust action, the expected pressure change direction is the pressure decrease direction; if the corresponding chamber is in a holding sequence, the expected pressure change direction is to remain within the reference pressure range or the stage allowable range. This feedback comparison is a result verification in process control, used to determine whether the control output causes a process variable response consistent with expectations.

[0042] S511: When the real-time pressure change direction matches the expected pressure change direction, the controller maintains the current priority control rule and writes the pressure timing data, execution status, and comparison results after the action into the feedback record. The feedback record serves as the input for calculating the pressure change rate, pressure deviation, and inter-chamber pressure difference in the next control cycle, ensuring that the results of the action are incorporated into subsequent control decisions. By returning the feedback record to the next control cycle, the process control chain forms a closed loop where the current execution result influences subsequent control decisions.

[0043] S512, when the real-time pressure change direction is inconsistent with the expected pressure change direction, the controller reads the execution status of the corresponding air chamber. If the execution status shows that the intake valve is open but the pressure does not rise as expected, the controller switches the corresponding air chamber to the restricted intake state and restricts the corresponding air chamber from entering the intake priority sequence in the next control cycle. If the execution status shows that the exhaust valve is open but the pressure does not drop as expected, the controller switches the corresponding air chamber to the restricted exhaust state and restricts the corresponding air chamber from entering the exhaust priority sequence in the next control cycle. If the pressure signal of the corresponding air chamber is missing, the controller switches the corresponding air chamber to the hold state and waits for the next sampling cycle or rereads the pressure sensor output value.

[0044] S513, intake restriction, exhaust restriction, and hold states are all written to the anomaly feedback log. The anomaly feedback log includes the chamber identifier, trigger sampling time, trigger condition, execution status, and post-switch status. When the controller reads the anomaly feedback log in the next control cycle, it prioritizes and masks chambers in intake restriction or exhaust restriction states until new pressure timing data and execution status meet the conditions for resuming participation. Through this feedback chain, the pressure response after the action can influence the target pressure correction and priority ranking in the next round. The anomaly feedback log is used to form a backoff boundary for abnormal states in process control, ensuring that abnormal sampling or execution results do not directly enter the normal control sequence.

[0045] In this embodiment, verification can be achieved through the single-chamber pressure records, execution status records, target correction records, and feedback records stored by the controller. If the same chamber has comparable sampling time, pressure value, execution status, and feedback switching status before and after the execution action, the implementation chain from pressure input, stage identification, target correction, priority control to feedback switching can be verified. If the pressure signal of a certain chamber is missing, the system is verified to have entered a reread or hold state through the pending verification record and abnormal feedback record. The above verification path corresponds to the consistency verification of sampling records, control records, and feedback records in process control.

[0046] Example 2

[0047] Please see Figures 1 to 5This embodiment provides a pressure adaptive adjustment and control system for a rescue air cushion. The difference between this embodiment and Embodiment 1 is that this embodiment uses a control system as the carrier, illustrating the signal, data, and control relationships between the pressure sensor, inflator, inlet valve, exhaust valve, storage unit, and controller, providing hardware and program execution support for the method described in Embodiment 1. At the process control system level, this embodiment further explains how the field acquisition components, controller, storage unit, and execution components form a hardware-software collaborative link for input, processing, output, and feedback.

[0048] The control system includes pressure sensors arranged in multiple air chambers, an inflator connected to each air chamber, inlet and outlet valves connected to each air chamber, a storage unit, and a controller. The pressure sensors send pressure values ​​to the controller. The inlet valves allow the corresponding air chamber to receive gas from the inflator after the controller outputs an inlet control command. The outlet valves allow the corresponding air chamber to release gas after the controller outputs an outlet control command. The inflator provides gas to the air chamber corresponding to the inlet valve when the operating conditions meet the zone adjustment requirements. The storage unit stores pressure timing data, stage determination rules, target pressure correction rules, execution status records, target correction records, and anomaly feedback records. The controller generates pressure change rate, pressure deviation, inter-chamber pressure difference, operating stage, target pressure correction amount, priority sequence, and feedback switching status. This control system uses pressure as the process variable, the air chamber as the controlled object, and the inflator, inlet valve, and outlet valve as actuators, forming the hardware foundation for the pressure process control of the rescue air cushion.

[0049] A pressure signal input path is established between the pressure sensor and the controller. After the pressure value output by the pressure sensor enters the controller, the controller generates a single-chamber pressure record according to the sampling time and chamber identifier. The controller also reads the execution status from the inflator, inlet valve, and exhaust valve. This execution status serves as the operating background synchronized with the pressure timing data and is stored in the storage unit. The pressure timing data and execution status records in the storage unit are respectively called by the controller to calculate the pressure change rate, pressure deviation, and inter-chamber pressure difference, and further generate the working stage and target pressure correction. This input path corresponds to the field signal acquisition path in process control, and this calling relationship corresponds to the processing path where process variables are transformed from raw sampled values ​​into control decision quantities.

[0050] The controller forms a control output path with the inflator, intake valve, and exhaust valve. When the target pressure correction, inter-chamber pressure difference, and inflator operating status meet the zoned adjustment conditions, the controller outputs control commands to the inflator and intake valve according to the intake priority sequence, and to the exhaust valve according to the exhaust priority sequence. No new valve action commands are output to chambers in the holding sequence. After the intake or exhaust valve actuates, the pressure sensor continues to send pressure values ​​to the controller in the next sampling cycle. The controller obtains the real-time pressure change direction based on the pressure timing data after the actuation, compares it with the expected pressure change direction, and switches the corresponding chamber to restricted intake, restricted exhaust, or holding state based on the comparison result. This control output path corresponds to the execution quantity issuance and process variable feedback return path in process control.

[0051] The stage determination rules stored in the storage unit are used to define the determination relationship between pressure change rate, pressure change duration, and execution status. The target pressure correction rule is used to define the combined relationship between working stage, pressure deviation, and inter-chamber pressure difference. The execution record is used to save the operating status of the inflator, intake valve, and exhaust valve. The above data forms a callable processing basis within the controller, enabling the control system to execute S1 to S5 in Embodiment 1. After system implementation, verification can be achieved by checking whether the sampling time alignment, stage identification results, target pressure correction amount, valve action records, and feedback switching status in the storage unit are continuously recorded according to the same chamber identifier. This continuous recording method is used to demonstrate the traceability relationship between input status, control judgment, execution action, and feedback status in the process control system.

[0052] The specific processes, data fields, decision sequences, state switching conditions, storage contents, and control objects in the above embodiments are only used to explain the possible implementations of the present invention. Equivalent substitutions, equivalent modifications, equivalent combinations, processing order adjustments, module-to-module replacements, equivalent transformations of field names, equivalent inheritance of execution entities, or equivalent changes in carrier forms supported by the protection scope text should all fall within the protection scope of this patent, provided they do not depart from the scope of the technical solutions described in this invention; however, they must not be extended to undescribed protection topics, nor should the substantive correspondence of technical objects be changed through changes in object names. In process control-related equivalent changes, the technical chain between process variable acquisition, control judgment, execution component response, and feedback correction should remain consistent.

Claims

1. A method for adaptive pressure adjustment of a rescue air cushion, characterized in that, Acquire pressure timing data of multiple air chambers of the rescue air cushion and the execution status of the inflator, air intake valve, and air exhaust valve; The pressure change rate, pressure deviation, and pressure difference between each chamber are calculated based on the pressure time series data. Combined with the execution status, the inflation preparation stage, standby holding stage, pressure response stage, or pressure recovery stage are identified. Based on the identified working stage, pressure deviation, and inter-chamber pressure difference, a target pressure correction amount is generated for each chamber. Based on the target pressure correction amount, inter-chamber pressure difference, and inflator operating status, zoning adjustment conditions are determined. The zoning adjustment conditions include chamber zoning determination conditions that require intake adjustment, exhaust adjustment, or maintenance adjustment. When the target pressure correction, the pressure difference between air chambers, and the operating status of the inflator meet the zoned adjustment conditions, the priority of air intake, exhaust, or maintenance for each air chamber is determined, and the operation of the inflator, intake valve, and exhaust valve is controlled according to the priority. The expected pressure change direction is determined based on the target pressure correction and the air intake, exhaust, or maintenance operation of the corresponding air chamber. Based on the pressure timing data after the action, the real-time pressure change direction is compared with the expected pressure change direction. When the comparison is inconsistent or the pressure signal is missing, the corresponding air chamber is switched to a state of restricted intake, restricted exhaust, or maintenance.

2. The adaptive pressure adjustment method for a rescue air cushion according to claim 1, characterized in that, When acquiring the pressure timing data of multiple air chambers of the rescue air cushion and the execution status of the inflator, the air inlet valve, and the air outlet valve, the output values ​​of the pressure sensors arranged in each air chamber are read according to the same sampling period, and the sampling time, air chamber identifier, and pressure value are combined to form a single air chamber pressure record; The start / stop status of the inflator, the open / closed status of the inlet valve, and the open / closed status of the exhaust valve are written into the execution status record corresponding to the single-chamber pressure record, so that the pressure timing data and the execution status are aligned according to the sampling time.

3. The adaptive pressure adjustment method for a rescue air cushion according to claim 2, characterized in that, When validating the single-chamber pressure record, the pressure values ​​of adjacent sampling times in the same chamber are continuously compared. When the pressure value is missing or the pressure difference between adjacent sampling times exceeds the preset jump boundary, the single-chamber pressure record of the corresponding sampling time is marked as a record to be reviewed. When the record to be reviewed has a corresponding execution status record, the record to be reviewed is retained and its participation in the pressure change rate calculation is restricted.

4. The adaptive pressure adjustment method for a rescue air cushion according to claim 2, characterized in that, When calculating the pressure change rate, the pressure deviation, and the pressure difference between the air chambers, adjacent pressure values ​​of the same air chamber are read according to the sampling time, and the change in adjacent pressure values ​​is associated with the corresponding sampling interval to generate the pressure change rate. The pressure deviation is generated by comparing the current pressure value with a preset reference pressure range. The inter-chamber pressure difference is generated by comparing the current pressure value of the target chamber with the current pressure values ​​of adjacent chambers or chambers in the same group.

5. The adaptive pressure adjustment method for a rescue air cushion according to claim 1, characterized in that, When identifying the inflation preparation stage, the standby holding stage, the pressure response stage, or the pressure recovery stage, first compare the pressure change rate with the stage change threshold, then compare the pressure change duration with the stage determination time window, and read the execution status. When the pressure change rate meets the stage change threshold and the pressure change duration meets the stage determination time window, it is identified as the pressure response stage; When the pressure change rate does not meet the stage change threshold and the pressure value is within the reference pressure range, it is identified as the standby holding stage.

6. The adaptive pressure adjustment method for a rescue air cushion according to claim 1, characterized in that, When generating the target pressure correction amount, the identified working stage, the pressure deviation of each air chamber, and the pressure difference between the air chambers are read; When the working stage is the standby holding stage, the target pressure correction amount is limited by the pressure deviation amount; When the working stage is a pressure response stage or a pressure recovery stage, the target pressure correction amount is determined by the pressure deviation and the pressure difference between the air chambers.

7. The adaptive pressure adjustment method for a rescue air cushion according to claim 6, characterized in that, When the target pressure correction amount is defined by the pressure deviation and the pressure difference between the air chambers, the deviation direction of the current pressure value of the target air chamber from the reference pressure range is first determined, and then the pressure difference direction between the target air chamber and the adjacent air chamber or the same group of air chambers is determined. When the deviation direction is consistent with the pressure difference direction, the correction amount corresponding to the pressure difference between the air chambers is added to the correction amount corresponding to the pressure deviation. When the deviation direction is inconsistent with the pressure difference direction, the target pressure correction amount is generated according to the correction amount corresponding to the pressure deviation amount.

8. The adaptive pressure adjustment method for a rescue air cushion according to claim 1, characterized in that, When determining the intake, exhaust, or maintenance priority of each air chamber, first compare the target pressure correction amount of each air chamber, and then compare the inter-air chamber pressure difference and the pressure change rate of each air chamber. When the target pressure correction amount corresponding to the air chamber meets the air intake conditions and the air compressor is in operation, the corresponding air chamber is included in the air intake priority sequence. When the target pressure correction amount corresponding to the air chamber meets the exhaust conditions, the corresponding air chamber is included in the exhaust priority sequence; When the target pressure correction amount corresponding to the air chamber does not meet the intake and exhaust conditions, the corresponding air chamber will be included in the holding sequence.

9. The adaptive pressure adjustment method for a rescue air cushion according to claim 8, characterized in that, The air compressor and the air intake valve are controlled to operate according to the air intake priority sequence, the exhaust valve is controlled to operate according to the exhaust priority sequence, and the pressure timing data is read in the next sampling period after the end of a single operation. When the real-time pressure change direction after the action is consistent with the expected pressure change direction, the current priority control rule is maintained. When the real-time pressure change direction after the action is inconsistent with the expected pressure change direction, or when the pressure signal of the corresponding air chamber is missing, the corresponding air chamber will be switched to a state of restricted intake, restricted exhaust, or hold.

10. A rescue airbag pressure adaptive adjustment control system, used to support the rescue airbag pressure adaptive adjustment method according to any one of claims 1 to 9, characterized in that, It includes pressure sensors arranged in multiple air chambers, an air inflator connected to the air chambers, an air inlet valve and an air outlet valve connected to the air chambers, a storage unit, and a controller; The pressure sensor sends pressure timing data to the controller, and the storage unit stores the pressure timing data, stage determination rules, target pressure correction rules, and execution records. The controller generates pressure change rate, pressure deviation and inter-chamber pressure difference based on pressure timing data and execution records, identifies the working stage and generates target pressure correction amount, and determines zoning adjustment conditions based on the target pressure correction amount, inter-chamber pressure difference and inflator operating status. The zoning adjustment conditions include zoning judgment conditions for chambers that require intake adjustment, exhaust adjustment or maintenance adjustment. When the target pressure correction, inter-chamber pressure difference, and inflator operating status meet the zoned adjustment conditions, the controller sends control commands to the inflator, intake valve, and exhaust valve in order of chamber priority, and switches the corresponding chamber to restricted intake, restricted exhaust, or hold state based on the pressure feedback after the action.

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