An electronic oxygen regulator on-line system maintenance method

Abstract

The application provides an electronic oxygen regulator online system maintenance method, and belongs to the technical field of airborne oxygen regulator control, and specifically comprises the following steps: storing maintenance test data and calibration test results in a nonvolatile memory; sending a maintenance instruction through a maintenance device, and testing the electronic oxygen regulator according to corresponding maintenance test data in the nonvolatile memory; calibrating each sensor according to a calibration result; after the maintenance device sends a calibration instruction, the electronic oxygen regulator performs calibration test, and stores a new calibration test result in the nonvolatile memory for use in the electronic oxygen regulator. Through the processing scheme, the maintenance efficiency and control accuracy of the control system are improved.

Description

Technical Field

[0001] This application relates to the field of airborne oxygen regulator control, and in particular to a method for maintaining an online system of an electronic oxygen regulator. Background Technology

[0002] Electronic oxygen regulators are used in aircraft oxygen supply systems. These systems provide continuous oxygen to pilots at high altitudes, preventing harm from low-pressure conditions. The aircraft oxygen supply system mainly consists of an aircraft oxygen source, an oxygen regulator, and a breathing chamber.

[0003] As the core intelligent control component of the aircraft oxygen supply system, the oxygen regulator identifies different flight conditions of the aircraft and the pilot's breathing status, and adjusts the pressure changes in the breathing chamber through control calculations to ensure the pilot's normal breathing.

[0004] The oxygen regulator plays a crucial role in the entire oxygen supply system. The ease of maintenance and reliability of the regulator are key to ensuring the long-term effective use of the oxygen supply system. Summary of the Invention

[0005] In view of this, this application provides an online system maintenance method for an electronic oxygen regulator, which improves the maintenance efficiency and control accuracy of the control system.

[0006] The online system maintenance method for an electronic oxygen regulator provided in this application adopts the following technical solution:

[0007] A method for maintaining an online system of an electronic oxygen regulator, wherein the electronic oxygen regulator is applied to an airborne oxygen supply control system, the oxygen supply control system includes an oxygen regulator, maintenance equipment, a non-volatile memory, an oxygen source, and a breathing chamber, the oxygen regulator being connected to the maintenance equipment, the non-volatile memory, the oxygen source, and the breathing chamber respectively, and the oxygen regulator controlling the oxygen supply from the oxygen source to the breathing chamber, the method comprising: The maintenance test data and calibration test results are stored in non-volatile memory; The electronic oxygen regulator sends maintenance commands through the maintenance equipment and performs tests based on the corresponding maintenance test data in the non-volatile memory. The electronic oxygen regulator calibrates each sensor based on the calibration results; After the maintenance equipment sends a calibration command, the electronic oxygen regulator performs a calibration test and stores the results of the new calibration test in non-volatile memory for use in the electronic oxygen regulator.

[0008] Optionally, in system maintenance mode, the system maintenance mode selection is executed through maintenance commands, calibration commands, and oxygen source pressure conditions sent by the maintenance equipment. The oxygen source pressure conditions ensure that sufficient oxygen is provided to support the oxygen regulator's control pressure build-up test. The system maintenance modes include pre-flight test mode, maintenance test mode, and calibration test mode. In pre-flight test mode, the test functions are automatically executed according to the set test sequence objectives, and the test results are judged and reported. In maintenance test mode, based on the received maintenance test instructions, the maintenance test target value and pass / fail threshold are found, maintenance test is performed, and the maintenance results are judged and reported. In calibration test mode, the corresponding sensor is calibrated according to the received calibration test command, the calibration result is judged, and the calibration result is stored and reported after successful calibration.

[0009] Optionally, in the pre-flight test mode, the selection of pre-flight test targets is designed in a time-segmented manner according to the focus of the use scenario, and pass / fail criteria are set at key points to automatically judge the test results and report the test results to the outside world.

[0010] Optionally, in the pre-flight test mode, the timing data of the test target is stored in non-volatile memory. After entering this test mode, the test target is first read from the non-volatile memory, and then the test is performed according to the predetermined timing target.

[0011] Optionally, in maintenance test mode, test objectives are designed based on user concerns, and different pass / fail criteria are designed for each concern. The test objectives are sent through the maintenance equipment, the regulator receives the test objectives and executes the test, automatically judges the test results and reports them.

[0012] Optionally, at each point of interest, based on the designed pass / fail criteria, if the test results are within the pass / fail range for 5 consecutive seconds within 30 seconds, the test is considered passed and the test item is exited; otherwise, the test fails.

[0013] Optionally, in calibration test mode, test types are designed according to the sensors to be calibrated, and calibration tests are performed on oxygen supply inlet pressure sensor, oxygen supply outlet pressure sensor, anti-load inlet pressure sensor, anti-load outlet pressure sensor, altitude pressure sensor, emergency oxygen pressure sensor and overload sensor respectively. Calibration tests are performed on different sensors according to different test instructions, and calibration results are saved.

[0014] In summary, this application includes the following beneficial technical effects: In pre-flight testing mode, fully automated testing can be performed, with defined key test points set and the testing process executed. In maintenance testing mode, it can serve as a supplement to pre-flight testing, performing targeted tests on test points of concern to maintenance personnel. In calibration testing mode, different sensors are calibrated as needed, and the calibration results are saved, improving control accuracy. This online system maintenance method increases the degree of automation in maintenance, is simple to operate, and can eliminate the influence of differences between different batches of sensors and different controllers on the system. Attached Figure Description

[0015] To more clearly illustrate the technical solutions of the embodiments of this application, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] This application provides a system maintenance architecture diagram. Detailed Implementation

[0017] The embodiments of this application will now be described in detail with reference to the accompanying drawings.

[0018] The following specific examples illustrate the implementation of this application. Those skilled in the art can easily understand other advantages and effects of this application from the content disclosed in this specification. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. This application can also be implemented or applied through other different specific embodiments, and the details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of this application. It should be noted that, in the absence of conflict, the following embodiments and features in the embodiments can be combined with each other. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0019] It should be noted that various aspects of embodiments within the scope of the appended claims are described below. It will be apparent that the aspects described herein can be embodied in a wide variety of forms, and any particular structure and / or function described herein is merely illustrative. Based on this application, those skilled in the art will understand that one aspect described herein can be implemented independently of any other aspect, and two or more of these aspects can be combined in various ways. For example, any number of aspects set forth herein can be used to implement the device and / or practice the method. Additionally, this device and / or method can be implemented using structures and / or functionalities other than one or more of the aspects set forth herein.

[0020] It should also be noted that the illustrations provided in the following embodiments are only schematic representations of the basic concept of this application. The drawings only show the components related to this application and are not drawn according to the actual number, shape and size of the components in the actual implementation. In the actual implementation, the form, quantity and proportion of each component can be arbitrarily changed, and the layout of the components may also be more complex.

[0021] Furthermore, specific details are provided in the following description to facilitate a thorough understanding of the examples. However, those skilled in the art will understand that the described aspects can be practiced without these specific details.

[0022] This application provides an online system maintenance method for an electronic oxygen regulator.

[0023] A method for maintaining an online system of an electronic oxygen regulator, wherein the electronic oxygen regulator is applied to an airborne oxygen supply control system, the oxygen supply control system includes an oxygen regulator, maintenance equipment, a non-volatile memory, an oxygen source, and a breathing chamber, the oxygen regulator being connected to the maintenance equipment, the non-volatile memory, the oxygen source, and the breathing chamber respectively, and the oxygen regulator controlling the oxygen supply from the oxygen source to the breathing chamber, the method comprising: Maintenance test data and calibration test results are stored in non-volatile memory. Maintenance commands are sent via the maintenance device, and the electronic oxygen regulator performs tests based on the corresponding maintenance test data in the non-volatile memory. The electronic oxygen regulator calibrates each sensor based on the calibration results. After the maintenance device sends a calibration command, the electronic oxygen regulator performs a calibration test and stores the new calibration test results in the non-volatile memory for use during the electronic oxygen regulator's operation. The results stored in the non-volatile memory are not lost after power-off.

[0024] In system maintenance mode, the system maintenance mode selection is executed through maintenance instructions, calibration instructions and oxygen source pressure conditions sent by the maintenance equipment. The oxygen source pressure conditions ensure that sufficient oxygen can be provided to support the oxygen regulator to perform control pressure build-up tests. The system maintenance modes include pre-flight test mode, maintenance test mode and calibration test mode.

[0025] In pre-flight test mode, the test functions are automatically executed according to the set test sequence objectives, and the test results are judged and reported.

[0026] In maintenance test mode, based on the received maintenance test instructions, the maintenance test target value and pass / fail threshold are located, maintenance test is performed, and the maintenance results are judged and reported.

[0027] In calibration test mode, the corresponding sensor is calibrated according to the received calibration test command, the calibration result is judged, and the calibration result is stored and reported after successful calibration.

[0028] In pre-flight testing mode, the selection of pre-flight test targets is designed in a time-segmented manner according to the focus of the usage scenario, and pass / fail criteria are set at key points. The test results are automatically judged and reported externally. In pre-flight testing mode, the timing data of the test targets is stored in non-volatile memory. After entering this test mode, the test targets are first read from the non-volatile memory, and then the test is executed according to the predetermined timing targets. The entire test process is fully automated. In pre-flight testing mode, the controller reads the pre-set timing target values ​​from the non-volatile memory, designs different control targets at different time points, and performs control calculations according to the set control laws. At the user's focus points, pass / fail criteria are designed according to user requirements. If the test requirements are met, the test passes; otherwise, the test fails, exits directly, and the test results are returned to the maintenance equipment.

[0029] In maintenance test mode, test objectives are designed based on user concerns, and different pass / fail criteria are designed for each concern. Test objectives are sent through the maintenance equipment, the controller receives and executes the tests, automatically judges the test results, and reports them. For each concern, according to the designed pass / fail criteria, if the test results are within the acceptable range for 5 consecutive seconds within 30 seconds, the test is considered passed and the test item is exited; otherwise, the test fails. In maintenance test mode, maintenance tests can be executed at different heights and under overload conditions based on different maintenance commands. Based on the received height and overload information, corresponding control target values ​​are set, and control calculations are performed according to these target values. If the control target is reached within the required control time, the test passes; otherwise, the test fails, and the test results are returned to the maintenance equipment. In calibration test mode, test types are designed according to the sensors to be calibrated, and calibration tests are performed on oxygen inlet pressure sensors, oxygen outlet pressure sensors, anti-load inlet pressure sensors, anti-load outlet pressure sensors, altitude pressure sensors, emergency oxygen pressure sensors, and overload sensors. Calibration tests are executed on different sensors according to different test commands, and the calibration results are saved. Based on received maintenance commands, the corresponding sensor calibration function is executed. In the calibration calculation of the corresponding sensor, a reference target value is selected, and calibration calculations are performed according to a predetermined algorithm. The final calibration result is stored in non-volatile memory for use in control calculations. In the calibration calculation, calibration test criteria are selected. If the deviation is too large during the calibration process, the calibration is terminated and considered a failure; otherwise, calibration calculations are performed, and the calibration results are reported to the maintenance equipment. This invention proposes an online system maintenance method for electronic oxygen regulators. This method provides three operating modes: pre-flight testing, maintenance testing, and calibration testing. Pre-flight testing is used to test system functionality before flight. After receiving a pre-flight testing command from the maintenance equipment, the regulator automatically executes the test function and reports the test results to the maintenance equipment. Maintenance testing executes maintenance control calculations based on maintenance commands sent by the maintenance equipment and returns the maintenance test results. Calibration testing is used for automatic calibration of various input sensors, and the calibration results are written to non-volatile memory for use in control calculations to calibrate the sensors. Through online maintenance, all maintenance functions can be executed automatically, improving the maintenance efficiency of the control system. Simultaneously, the automatic calibration of sensors eliminates individual differences, improves control accuracy, and meets the compatibility requirements of different products with the system.

[0030] In one specific embodiment, an online system maintenance method for an oxygen regulator is provided, which realizes the online automatic system maintenance function of the oxygen regulator.

[0031] 1. The system maintenance process architecture is defined, such as... Figure 1 As shown: 1.1 defines the overall structure of the system maintenance process, including maintenance equipment (MTC), oxygen regulator (YTQ), oxygen source (OXSRC), breathing chamber (BRTH), and non-volatile memory (EEPROM).

[0032] 1.2 Define the internal interface cross-linking relationships of the system maintenance architecture, specifically including the maintenance command interface (CMD) between the "maintenance equipment" and the "oxygen regulator"; the data reporting interface (RPT) between the "oxygen regulator" and the "maintenance equipment"; the airflow interface (FLOW) between the "oxygen regulator" and the "breathing chamber"; the pressure acquisition interface (PRE) between the "breathing chamber" and the "oxygen regulator"; the pressure acquisition interface (PRE) and airflow interface (FLOW) between the "oxygen source" and the "oxygen regulator"; and the data read / write interface (MEM) between the "oxygen regulator" and the "non-volatile memory".

[0033] 2. Define the state machine for the maintenance mode of the oxygen regulator system.

[0034] 2.1 In normal operating mode, determine whether to enter system maintenance mode based on the test switch status and oxygen source pressure conditions.

[0035] 2.2 In system maintenance mode, the system transitions between three states: pre-flight test, maintenance test, and calibration test, based on the received maintenance instructions.

[0036] 2.3 In the pre-flight test mode, the entire test process is executed automatically. In the maintenance test and calibration test modes, different test functions are executed according to the received maintenance and calibration instructions.

[0037] 3. Define system maintenance test criteria and result reporting logic.

[0038] 3.1 In pre-flight testing, test judgment logic is set at each key test point. In maintenance and calibration testing, different test objectives correspond to different test criteria.

[0039] 3.2 After the test is completed, the test results will be reported. After each sub-test is completed, the test will be reported as passed or failed. When moving on to the next test item, the test will be reported as being in progress.

[0040] This application provides an online system maintenance method for an electronic oxygen regulator, the maintenance process of which is as follows: 1. Define the data relationships corresponding to each interface of the oxygen regulator, as shown in Table 1: Table 1 Oxygen Regulator Interface Definition

[0041] 2. Set the system to maintenance mode. Set the test switch to grounding mode, adjust the oxygen source pressure, and put the system into maintenance mode. To prevent repeated maintenance tests due to test switch failure, add the following condition to the entry requirements: the time interval between the current entry into maintenance mode and the last entry into maintenance mode must be greater than 1.5 seconds. 3. Set different system maintenance modes.

[0042] 3.1 Set the maintenance test command to "Maintenance Complete" and the calibration command to "Calibration Complete" to enter the pre-flight test mode; set the maintenance test command to "Maintenance Start" and the calibration command to "Calibration Complete" to enter the maintenance test mode; set the maintenance command to "Maintenance Complete" and the calibration command to "Calibration Start" to enter the calibration test mode. 3.2 Perform pre-flight tests. After entering the pre-flight test mode, read the stored pre-flight test timing target values ​​from the non-volatile memory, execute the control target test according to the time sequence, and judge the test results. After the required test time is reached, end the test and report the test results. The test results will be reported continuously for 10 seconds, and then exit the maintenance test. 3.3 Perform maintenance tests. After entering maintenance test mode, perform maintenance tests according to the maintenance commands sent by the maintenance equipment. If the maintenance test passes within 30 seconds, report that the test has passed. If the test fails within 30 seconds, report that the test has failed. During the test, report that the test is in progress. After each maintenance test is completed, in order to prevent accidental operation, you need to exit the current maintenance test item before you can enter the next maintenance test. 3.4 Perform calibration tests. After entering calibration test mode, according to the calibration instructions sent by the maintenance equipment, perform calibration on different sensors according to different calibration commands. If the calibration is successful within 5 seconds, the calibration result is written to the non-volatile memory, and the calibration test is reported to the maintenance equipment. If the calibration fails, no calibration result is written, and the calibration test is reported to the maintenance equipment. During the calibration process, the system continuously reports that calibration is in progress. After each calibration test is completed, to prevent accidental operation, the current calibration test item must be exited before proceeding to the next calibration test. 4. Pre-flight test objectives and judgment methods. Pre-flight testing is completed within the required time period T. This time period T is divided into multiple smaller time periods, t1, t2, ..., tn. Each corresponding time period has a corresponding control objective, t1, t2, ..., tn. Test criteria are designed for times t1, t2, and up to tn, with the judgment threshold selected based on the control requirements of different systems. 5. Maintenance Test Objectives and Judgment Methods. Based on the maintenance command, locate the corresponding maintenance objective and pass / fail threshold. The judgment period should not exceed 30 seconds. If the system can be controlled within the effective range within 30 seconds, the test passes, and the current test result is reported. If the test exceeds 30 seconds or overpressure occurs during control, the test fails, and the current test result is reported. The test objectives can be designed based on the focus points. This design includes 9 maintenance test points: high1, high2, high3, high4, high5, G1, G2, G3, and G4. 6. Calibration Test Objectives and Judgment Methods. According to the calibration command, the corresponding sensors are calibrated. Upon successful calibration, the test results are written to non-volatile memory, and the calibration is reported as successful to the maintenance equipment; otherwise, calibration failure is reported. This design calibrates seven types of sensors: oxygen inlet pressure sensor, oxygen outlet pressure sensor, anti-load inlet pressure sensor, anti-load outlet pressure sensor, altitude pressure sensor, emergency oxygen pressure sensor, and overload sensor. This can be expanded for specific situations during use.

[0043] In summary, this invention belongs to the field of airborne oxygen regulators and relates to an online system maintenance method for oxygen regulators. The method performs system maintenance functions through interaction between the system and maintenance equipment and reports the maintenance results.

[0044] This method implements system maintenance online, effectively improving maintenance efficiency and saving time. Simultaneously, in calibration testing mode, it calibrates and tests sensor signals, eliminating errors caused by different sensor batches. This method is highly independent, effectively adaptable to different control systems, highly scalable, and possesses significant practical value.

[0045] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A method for maintaining an online system of an electronic oxygen regulator, characterized in that, The electronic oxygen regulator is applied to an airborne oxygen supply control system, which includes an oxygen regulator, maintenance equipment, a non-volatile memory, an oxygen source, and a breathing chamber. The oxygen regulator is connected to the maintenance equipment, the non-volatile memory, the oxygen source, and the breathing chamber, respectively. The oxygen regulator controls the oxygen supply from the oxygen source to the breathing chamber. The method includes: The maintenance test data and calibration test results are stored in non-volatile memory; The electronic oxygen regulator sends maintenance commands through the maintenance equipment and performs tests based on the corresponding maintenance test data in the non-volatile memory. The electronic oxygen regulator calibrates each sensor based on the calibration results; After the maintenance equipment sends a calibration command, the electronic oxygen regulator performs a calibration test and stores the results of the new calibration test in non-volatile memory for use in the electronic oxygen regulator. In system maintenance mode, the system maintenance mode selection is executed through maintenance commands, calibration commands, and oxygen source pressure conditions sent by the maintenance equipment. The oxygen source pressure conditions ensure that sufficient oxygen can be provided to support the oxygen regulator in controlling pressure build-up testing. System maintenance modes include pre-flight test mode, maintenance test mode, and calibration test mode. In pre-flight test mode, the test functions are automatically executed according to the set test sequence objectives, and the test results are judged and reported. In maintenance test mode, based on the received maintenance test instructions, the maintenance test target value and pass / fail threshold are found, maintenance test is performed, and the maintenance results are judged and reported. In calibration test mode, the corresponding sensor is calibrated according to the received calibration test command, the calibration result is judged, and the calibration result is stored and reported after successful calibration. In maintenance test mode, test objectives are designed based on user concerns, and different pass / fail criteria are designed for each concern. The test objectives are sent through the maintenance equipment, the regulator receives the test objectives and executes the test, automatically judges the test results and reports them. At each point of interest, according to the designed pass / fail criteria, if the test results are within the pass / fail range for 5 consecutive seconds within 30 seconds, the test is considered to have passed and the test item is exited; otherwise, the test fails.

2. The online maintenance method for an electronic oxygen regulator according to claim 1, characterized in that, In the pre-flight test mode, the selection of pre-flight test targets is designed in stages and time segments according to the focus of the usage scenario, and pass / fail criteria are set at key points. The test results are automatically judged and reported to the maintenance equipment.

3. The online maintenance method for an electronic oxygen regulator according to claim 2, characterized in that, In the pre-flight test mode, the timing data of the test target is stored in non-volatile memory. After entering this test mode, the test target is first read from the non-volatile memory, and then the test is executed according to the predetermined timing target.

4. The online maintenance method for an electronic oxygen regulator according to claim 1, characterized in that, In calibration test mode, test types are designed according to the sensors to be calibrated, and calibration tests are performed on oxygen supply inlet pressure sensor, oxygen supply outlet pressure sensor, anti-load inlet pressure sensor, anti-load outlet pressure sensor, altitude pressure sensor, emergency oxygen pressure sensor and overload sensor respectively. Calibration tests are performed on different sensors according to different test instructions, and calibration results are saved.

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