Automatic aging test system and test method for oxygen generator

Abstract

The invention discloses an oxygen generator automatic aging test system and test method, a plurality of flow concentration testers simultaneously detect the flow and concentration of oxygen discharged from oxygen outlets of a plurality of oxygen generators, and a communication conversion box uniformly collects test data of each flow concentration tester and transmits the test data to a computer; an upper computer analysis module on the computer arranges and stores detection data of each flow concentration tester to obtain visual aging data of all the oxygenerators, and the upper computer analysis module automatically analyzes the aging data of each oxygenerator and gives an aging result; the upper computer analysis module can feed back an analysis result to the computer, and the computer outputs a detection result, the aging test efficiency of the oxygen generator is remarkably improved, the labor cost is saved, meanwhile, manual operation errors are avoided, aging test data are traceable, and a detection report can be generated according to requirements.

Description

Technical Field

[0001] The invention relates to the technical field of oxygen concentrators, and in particular to an automatic aging test system for oxygen concentrators. Background Art

[0002] Oxygen concentrator aging test plays a particularly important role in the manufacturing process of oxygen concentrators. Medical oxygen concentrators must undergo comprehensive aging tests and the test results must meet regulatory standards before they can be shipped normally. Therefore, the stability, high efficiency and ease of operation of the aging test system are particularly important.

[0003] Traditional aging test modes mostly use timed aging + manual measurement + manual recording of measurement results to complete the aging test process. The following problems may occur during this test:

[0004] Problem 1: It is impossible to record all data of the aging process;

[0005] Problem 2: Batch operation is not possible, and testers can only measure and record machines one by one each time;

[0006] Problem 3: Manual testing must ensure that the test time meets the standard in order to obtain stable data, which leads to low test efficiency;

[0007] Question 4: There is human judgment error in the result judgment;

[0008] Question 5: If the test results are in paper form, they are easily lost. If they are uploaded as electronic files, there will also be manual errors. Summary of the invention

[0009] In order to overcome the above defects, the present invention provides an oxygen concentrator automatic aging test system and test method, the oxygen concentrator automatic aging test system and test method have high test efficiency, accurate test results, and traceability of test data.

[0010] The present invention adopts a technical solution to solve its technical problems: an automatic aging test system for an oxygen concentrator, comprising a flow concentration tester, a communication conversion box, a computer and a host computer analysis module, wherein a plurality of flow concentration testers can simultaneously detect the flow and concentration of oxygen discharged from the oxygen outlets of a plurality of oxygen concentrators, each flow concentration tester is respectively connected to the communication conversion box through a cable, the communication conversion box can collect test data of each flow concentration tester, the communication conversion box is connected to the computer through a cable, the communication conversion box can uniformly transmit the test data of each flow concentration tester collected to the computer, the host computer analysis module on the computer can analyze the detection data of each flow concentration tester to determine whether the corresponding oxygen concentrator has aging phenomenon, the host computer analysis module can feed back the analysis result to the computer, and the computer outputs the detection result.

[0011] As a further improvement of the present invention, the flow concentration tester includes an air intake chamber, a gas mass flow meter, an ultrasonic oxygen concentration sensor, an air intake pump, an air outlet pump and a control and display system. An air intake pipeline is provided at one end of the air intake chamber, and an exhaust pipeline is provided at the other end of the air intake chamber. The air intake pipeline can be connected to the oxygen outlet of the oxygen generator. The air intake pump can inhale the oxygen discharged from the oxygen outlet of the oxygen generator into the air intake chamber of the flow concentration tester, and the air outlet pump can discharge the gas in the air intake chamber of the flow concentration tester through the exhaust pipeline. The gas mass flow meter and the ultrasonic oxygen concentration sensor are respectively arranged on the air intake pipeline. The gas mass flow meter can measure the flow data of the gas in the air intake pipeline, and the ultrasonic oxygen concentration sensor can detect the oxygen concentration data in the air intake pipeline. The control and display system can control the start and stop of the air intake pump and the air outlet pump. The control and display system can also display the flow data and oxygen concentration data of the gas in the air intake pipeline. The control and display system is electrically connected to the communication conversion box to communicate and transmit the flow data and oxygen concentration data.

[0012] As a further improvement of the present invention, the air suction pump is a double-head air suction pump, which inhales air through two air inlet pipelines, the gas mass flow meter and the ultrasonic oxygen concentration sensor are respectively arranged on the two air inlet pipelines, and the air outlet pump is a single-head air outlet pump.

[0013] As a further improvement of the present invention, an alarm system is further provided, and the alarm system is electrically connected and communicated with the computer, and the computer can control the alarm system to issue a corresponding alarm according to the analysis result fed back by the upper computer analysis module.

[0014] As a further improvement of the present invention, the host computer analysis module can also generate batch measurement files for the test results according to the test date and test time, and generate a test report for the measurement files according to the set requirements. A printer is also provided, and the printer is connected to the computer, and the computer can print out the test data and the test report through the printer.

[0015] An automatic aging test method for an oxygen concentrator comprises the following steps:

[0016] Step 1: The flow rate and concentration tester detects the oxygen flow rate and concentration discharged from the oxygen outlet of the oxygen concentrator to obtain oxygen flow rate data and oxygen concentration data respectively;

[0017] Step 2: The concentration flow tester organizes the test results of the oxygen concentration data and the oxygen flow data, and then sends them to the communication adapter box through the communication interface;

[0018] Step 3: The communication adapter box summarizes the test results of multiple concentration flow testers and reports them to the computer;

[0019] Step 4: The host computer analysis module organizes and stores the oxygen flow data and oxygen concentration data of all oxygen concentrators obtained by the computer to obtain visualized aging data of all oxygen concentrators. The host computer analysis module then automatically analyzes the aging data of each oxygen concentrator and gives the aging results.

[0020] As a further improvement of the present invention, when analyzing the aging data of the oxygen concentrator, the host computer analysis module first determines whether the oxygen concentrator is a traditional oxygen concentrator or a portable oxygen concentrator with continuous gas discharge by the following calculation method, and analyzes the mean square error of the data per unit time based on the measured original oxygen flow data:

[0021]

[0022] Where: n is the number of data points;

[0023] yi is the i-th actual observation value;

[0024] y^ is the i-th predicted value;

[0025] When the mean square error fluctuation is less than the set range, it is determined that the oxygen concentrator is a traditional oxygen concentrator that continuously outputs gas;

[0026] When the mean square error fluctuation exceeds the set range, it is determined that the oxygen concentrator is a portable oxygen concentrator with intermittent gas output.

[0027] As a further improvement of the present invention, when the oxygen concentrator is determined to be a portable oxygen concentrator, the data obtained by the gas mass flow meter is the instantaneous flow value of the portable oxygen concentrator. The upper computer analysis module obtains the instantaneous flow through the gas mass flow meter, and calculates the single gas output volume, the single gas output maximum value and the cumulative gas output volume within the set time of the portable oxygen concentrator under test. The single gas output volume is the instantaneous flow obtained by the gas mass flow meter for integration operation. When the portable oxygen concentrator under test is outgassing, the integral operation threshold is triggered, and the integral operation is started. When the portable oxygen concentrator under test stops outgassing, the integral operation stops. At this time, the result obtained by the integral calculation is the gas output volume this time. The cumulative gas output volume is obtained by accumulating the data per unit time (minutes), and the FIFO model is used to keep the accumulated data per unit time (minutes) always the latest data, so as to ensure that the minute flow rate is updated in time after each gas outgassing. The algorithm description is:

[0028]

[0029] Where: A represents the single gas output;

[0030] f(x) represents the actual curve of the gas outlet;

[0031] g(x) represents the trigger threshold;

[0032] B represents the minute flow rate;

[0033] k represents the number of gas outflows per minute;

[0034] The maximum single gas output value (single maximum flow rate) is the maximum value within the integral item, and the cumulative gas output (cumulative flow rate) is the sum of the flow data continuously recorded since the flow concentration detector starts running.

[0035] As a further improvement of the present invention, when the oxygen concentrator is determined to be a conventional oxygen concentrator, the test process data is analyzed, and the analysis process is as follows:

[0036] 1). Analyze the stability of oxygen generator operation based on the mean square error data of oxygen concentration and flow rate:

[0037] If the mean square error data is within the preset range, it means that the performance of the oxygen concentrator meets the standard;

[0038] If the mean square error data is not within the preset range, it means that the oxygen concentrator performance does not meet the standards;

[0039] 2). If the mean square error data is not within the preset range, the Z-Score method is used again to perform statistical analysis on the data, and the abnormal data, abnormal difference range and abnormal occurrence time of the oxygen concentrator are directly marked to intuitively reflect the operating status of the oxygen concentrator under test. The algorithm description of the Z-Score method is:

[0040]

[0041] Where: X: original data;

[0042] Average;

[0043] S: standard deviation;

[0044] When the oxygen concentrator is determined to be a portable oxygen concentrator, the single gas output volume and the single maximum gas output volume of the oxygen concentrator are substituted into the algorithm of the aforementioned step 1) and step 2), and the operating status of the oxygen concentrator is intuitively judged based on the feedback results.

[0045] As a further improvement of the present invention, the concentration flow tester simulates the active breathing mode of a person by starting and stopping the suction pump to test whether the portable oxygen concentrator can meet the concentration flow of medical standards under different breathing frequencies.

[0046] The beneficial effects of the present invention are as follows: the present invention can support aging tests of traditional oxygen concentrators and portable oxygen concentrators, has a wide range of applications, and can test multiple oxygen concentrators simultaneously to achieve batch testing of oxygen concentrators, and in the testing process, batch analysis of test data is performed to give judgment results, which significantly improves the aging test efficiency of oxygen concentrators. The testing process is fully automated and intelligent, and no manual recording and operation are required, which saves labor costs and avoids manual operation errors. All aging test data in the detection process are automatically recorded, and the traceability of aging test data is achieved. After the test, the upper computer analysis module can also analyze the test data to generate a batch measurement file, and generate a test report according to the set requirements for the measurement file. The test personnel can directly view the test report on the computer or print the test report out through a printer. BRIEF DESCRIPTION OF THE DRAWINGS

[0047] Figure 1 It is a work flow chart of the present invention;

[0048] Figure 2 This is a schematic diagram of a single flow integration of the present invention;

[0049] Figure 3 It is a schematic diagram of the communication principle of the present invention. DETAILED DESCRIPTION

[0050] Embodiment: An automatic aging test system for an oxygen concentrator comprises a flow concentration tester 1, a communication conversion box 2, a computer 3 and an upper computer analysis module 4. Several flow concentration testers 1 can simultaneously detect the oxygen flow and concentration discharged from the oxygen outlets of several oxygen concentrators. Each flow concentration tester 1 is connected to the communication conversion box 2 via a cable, and the communication conversion box 2 can collect test data of each flow concentration tester 1. The communication conversion box 2 is connected to the computer 3 via a cable, and the communication conversion box 2 can uniformly transmit the test data of each flow concentration tester 1 collected to the computer 3. The upper computer analysis module 4 on the computer 3 can analyze the detection data of each flow concentration tester 1 to determine whether the corresponding oxygen concentrator is aging. The upper computer analysis module 4 can feed back the analysis result to the computer 3, and the computer 3 outputs the detection result.

[0051] During the detection, the oxygen concentrator is started, and the concentration flow tester performs autonomous detection on the oxygen flow rate and oxygen concentration discharged from the oxygen outlet of the oxygen concentrator. The concentration flow tester organizes the detection results of the concentration and flow rate, and then sends them to the communication conversion box 2 through the communication interface. The communication conversion box 2 collects and summarizes the detection results of multiple concentration flow testers and uniformly reports them to the computer 3. The computer 3 can obtain all the process data of the aging test of multiple oxygen concentrators. The host computer analysis module 4 analyzes, organizes and stores these data to obtain all the visualized aging process data of the oxygen concentrator. The host computer analysis module 4 can also automatically analyze and give the aging results according to the aging data.

[0052] Since the upper computer analysis module 4 automatically records and stores all aging test data during the detection process, the aging test data can be traced after the detection is completed, which is convenient for real-time query of the detection data. The entire detection process of the automatic aging test system for the oxygen concentrator is automatically completed, without the need for manual measurement and recording, and no manual analysis. All are automatically detected and intelligently analyzed and processed by the detection system, and all detection data and test results are directly given, which significantly improves the efficiency of the oxygen concentrator aging test, and also realizes batch testing and analysis of oxygen concentrators, greatly improves the detection efficiency, saves labor, avoids manual operation errors, and ensures detection accuracy.

[0053] The flow concentration tester 1 includes an air intake chamber, a gas mass flow meter, an ultrasonic oxygen concentration sensor, an air intake pump, an air outlet pump and a control and display system. An air intake pipeline is provided at one end of the air intake chamber, and an exhaust pipeline is provided at the other end of the air intake chamber. The air intake pipeline can be connected to the oxygen outlet of the oxygen generator. The air intake pump can inhale the oxygen discharged from the oxygen outlet of the oxygen generator into the air intake chamber of the flow concentration tester 1, and the air outlet pump can discharge the gas in the air intake chamber of the flow concentration tester 1 through the exhaust pipeline. The gas mass flow meter and the ultrasonic oxygen concentration sensor are respectively arranged on the air intake pipeline. The gas mass flow meter can measure the flow data of the gas in the air intake pipeline, and the ultrasonic oxygen concentration sensor can detect the oxygen concentration data in the air intake pipeline. The control and display system can control the start and stop of the air intake pump and the air outlet pump. The control and display system can also display the flow data and oxygen concentration data of the gas in the air intake pipeline. The control and display system is electrically connected to the communication conversion box 2 to communicate and transmit the flow data and oxygen concentration data.

[0054] The flow detection adopts a gas mass flow meter made of a micro-electromechanical system (MEMS) flow sensor chip. The mass flow meter adopts thermal measurement to measure the flow rate by the molecular mass carried away by the split molecules. Because it uses thermal measurement, the measurement results will not be affected by changes in gas temperature and pressure. The flow detection is accurate, fast, reliable, efficient, stable and flexible. The concentration detection adopts an ultrasonic oxygen concentration sensor. The ultrasonic oxygen concentration sensor uses acoustic and electrochemical phenomena to determine the oxygen concentration level by measuring the attenuation of sound waves or the change of return signals. It has the advantages of non-contact measurement, easy use, strong anti-interference ability, high detection accuracy and low cost. During the detection, the suction pump is used to simulate the spontaneous breathing of the human body. During the inhalation process, the gas mass flow meter and the ultrasonic oxygen concentration sensor simultaneously detect the flow rate and oxygen concentration of the inhaled gas, which can highly simulate the oxygen supply situation when the oxygen generator is in use. The oxygen supply flow rate and concentration data of the oxygen generator are accurate. By setting the control display system, the frequency and pressure of the suction pump and the exhaust pump can be changed to simulate the breathing state of different personnel. During adjustment, the flow rate data and oxygen concentration data of the gas in the air intake pipeline can be directly displayed on the control display system, which is convenient for manual viewing of real-time data. The control display system can also display the working frequency, air pressure and other data of the suction pump and the exhaust pump, which is convenient for workers to adjust.

[0055] The air suction pump is a double-head air suction pump, which inhales air through two air inlet pipelines, the gas mass flow meter and the ultrasonic oxygen concentration sensor are respectively arranged on the two air inlet pipelines, and the air outlet pump is a single-head air outlet pump. The double-head air suction pump can fully simulate the two nasal cavities of humans, and can also avoid mutual interference between the gas mass flow meter and the ultrasonic oxygen concentration sensor.

[0056] An alarm system 5 is also provided, and the alarm system 5 is electrically connected and communicated with the computer 3. The computer 3 can control the alarm system 5 to issue a corresponding alarm according to the analysis result fed back by the upper computer analysis module 4. When the test result is abnormal, the alarm system will issue an alarm and display which oxygen concentrator has failed the test, so that the test personnel can find the oxygen concentrator with abnormal test in time.

[0057] The host computer analysis module 4 can also generate batch measurement files from the test results according to the test date and test time, and generate test reports from the measurement files according to the set requirements. A printer 6 is also provided, and the printer 6 is connected to the computer 3. The computer 3 can print out the test data and the test report through the printer 6. The host computer analysis module 4 automatically classifies and organizes the test data according to the test date, test time and test results, and stores the test data, which is convenient for later traceability and inquiry, automatically generates the test report, and automatically prints it to form a formal file, which is convenient for forming a report file for external presentation.

[0058] Several expansion interfaces may also be provided on the host computer analysis module for setting various configuration options (e.g., configurable measurement determination results, configurable measurement device options, configurable measurement device SN) and various convenient operation schemes (e.g., one-key start of all oxygen concentrator measurements, one-key analysis of all oxygen concentrator test data, one-key export of test process and test result data);

[0059] An automatic aging test method for an oxygen concentrator comprises the following steps:

[0060] Step 1: The flow rate and concentration tester 1 detects the oxygen flow rate and concentration discharged from the oxygen outlet of the oxygen concentrator to obtain oxygen flow rate data and oxygen concentration data respectively;

[0061] Step 2: The concentration flow tester organizes the test results of the oxygen concentration data and the oxygen flow data, and then sends them to the communication adapter box through the communication interface;

[0062] Step 3: The communication adapter box summarizes the test results of multiple concentration flow testers and uniformly reports them to the computer 3, so that the computer 3 can obtain all the process data of the aging test of multiple devices;

[0063] Step 4: The upper computer analysis module 4 organizes and stores the oxygen flow data and oxygen concentration data of all oxygen concentrators obtained by the computer 3 to obtain visualized aging data of all oxygen concentrators. The upper computer analysis module 4 then automatically analyzes the aging data of each oxygen concentrator and gives an aging result.

[0064] When analyzing the aging data of the oxygen concentrator, the host computer analysis module 4 first determines whether the oxygen concentrator is a traditional oxygen concentrator or a portable oxygen concentrator that continuously discharges gas by the following calculation method, and analyzes the mean square error of the data per unit time based on the measured original oxygen flow data:

[0065]

[0066] Where: n is the number of data points;

[0067] yi is the i-th actual observation value;

[0068] y^ is the i-th predicted value;

[0069] When the mean square error fluctuation is less than the set range, it is determined that the oxygen concentrator is a traditional oxygen concentrator with continuous gas outlet. The gas outlet mode of the traditional oxygen concentrator is continuous gas outlet, so the flow rate is at a relatively stable value, and the mean square error fluctuation is very small;

[0070] When the mean square error fluctuates beyond the set range, it is determined that the oxygen concentrator is an intermittent portable oxygen concentrator. The portable oxygen concentrator has an intermittent gas outlet, so the flow rate will appear sometimes and sometimes not, and the mean square error must be relatively large;

[0071] According to the fluctuation range of the mean square error, it is easy to distinguish whether the oxygen concentrator is a traditional oxygen concentrator or a portable oxygen concentrator.

[0072] Before analyzing the oxygen concentrator test data, first determine whether the oxygen concentrator is a traditional continuous gas outlet type or an intermittent gas outlet type portable oxygen concentrator, and then analyze them separately according to the type of oxygen concentrator to prevent analysis errors and ensure accurate analysis results.

[0073] When the oxygen concentrator is determined to be a portable oxygen concentrator, the data obtained by the gas mass flow meter is the instantaneous flow value of the portable oxygen concentrator. The upper computer analysis module 4 obtains the instantaneous flow through the gas mass flow meter, and calculates the single gas output volume, the maximum single gas output value and the cumulative gas output volume within the set time of the portable oxygen concentrator under test. The single gas output volume is the instantaneous flow obtained by the gas mass flow meter for integration operation. When the portable oxygen concentrator under test is exhaling, the integral operation threshold is triggered, and the integral operation starts. When the portable oxygen concentrator under test stops exhaling, the integral operation stops. At this time, the result obtained by the integral calculation is the gas output volume this time. The cumulative gas output volume is obtained by accumulating the data per unit time (minutes), and the FIFO model is used to keep the accumulated data per unit time (minutes) always the latest data, so as to ensure that the minute flow rate is updated in time after each gas outflow. The algorithm description is:

[0074]

[0075] Where: A represents the single gas output;

[0076] f(x) represents the actual curve of the gas outlet;

[0077] g(x) represents the trigger threshold;

[0078] B represents the minute flow rate;

[0079] k represents the number of gas outflows per minute;

[0080] The maximum single gas output value (single maximum flow rate) is the maximum value within the integral item, and the cumulative gas output (cumulative flow rate) is the sum of the flow data continuously recorded since the flow concentration detector starts running.

[0081] By recording the gas outlet interval of the oxygen concentrator under test, and calculating the gas outlet times per minute of the oxygen concentrator under test by averaging and accumulating, the flow rate per minute of the oxygen concentrator under test can be calculated based on the historical single gas outlet volume;

[0082] The maximum value of a single gas outflow provides intuitive data support for the oxygen concentrator's gas outflow pressure and gas outflow sensation;

[0083] Cumulative air output provides another way to calculate the average flow rate over a given period of time.

[0084] When testing a portable oxygen concentrator, the body mass flow meter obtains the instantaneous flow of the device; the concentration flow tester uses the instantaneous flow obtained by the gas mass flow meter to give the single gas output, the maximum single gas output, and the cumulative gas output of the oxygen concentrator under test; the single gas output is the integration operation of the instantaneous flow obtained by the gas mass flow meter. When the oxygen concentrator under test is exhaling, the integral operation threshold is triggered, and the integral operation starts. When the gas is discharged, the integral operation stops. At this time, the result of the integral calculation is the amount of this gas output. The maximum single gas output is the instantaneous flow obtained by the gas mass flow meter, and the maximum value of the single integral phase in the integral process is recorded. The cumulative gas output is obtained by accumulating the single gas output. The concentration flow tester records the gas outlet interval of the device under test, and obtains the number of gas outlets per minute of the device under test by averaging and accumulating. Based on the historical single gas output, the minute flow of the device under test can be calculated. The maximum single gas output provides intuitive data support for the machine's gas outlet pressure and gas outlet feel, and the cumulative gas output provides another method for calculating the average flow rate within a given time.

[0085] When the oxygen concentrator is determined to be a traditional oxygen concentrator, the test process data is analyzed as follows:

[0086] 1). Analyze the stability of oxygen generator operation based on the mean square error data of oxygen concentration and flow rate:

[0087] If the mean square error data is within the preset range, it means that the performance of the oxygen concentrator meets the standard;

[0088] If the mean square error data is not within the preset range, it means that the oxygen concentrator performance does not meet the standards;

[0089] 2). If the mean square error data is not within the preset range, the Z-Score method is used again to perform statistical analysis on the data, and the abnormal data, abnormal difference range and abnormal occurrence time of the oxygen concentrator are directly marked to intuitively reflect the operating status of the oxygen concentrator under test. The algorithm description of the Z-Score method is:

[0090]

[0091] Where: X: original data;

[0092] Average;

[0093] S: standard deviation;

[0094] When the oxygen concentrator is determined to be a portable oxygen concentrator, the single gas output volume and the single maximum gas output volume of the oxygen concentrator are substituted into the algorithm of the aforementioned step 1) and step 2), and the operating status of the oxygen concentrator is intuitively judged based on the feedback results.

[0095] The concentration flow tester simulates the active breathing mode of a person by starting and stopping the suction pump to test whether the portable oxygen concentrator can meet the concentration flow of medical standards under different breathing frequencies.

Claims

1. An oxygen concentrator automatic aging test system, characterized in that: The invention comprises a flow concentration tester (1), a communication conversion box (2), a computer (3) and a host computer analysis module (4). A plurality of flow concentration testers can simultaneously detect the flow rate and concentration of oxygen discharged from the oxygen outlets of a plurality of oxygen concentrators. Each flow concentration tester is connected to the communication conversion box via a cable. The communication conversion box can collect test data of each flow concentration tester. The communication conversion box is connected to the computer via a cable. The communication conversion box can uniformly transmit the test data collected by each flow concentration tester to the computer. The host computer analysis module on the computer can analyze the test data of each flow concentration tester to determine whether the corresponding oxygen concentrator is aging. The host computer analysis module can feed back the analysis result to the computer, and the computer outputs the test result.

2. The oxygen concentrator automatic aging test system according to claim 1 is characterized in that: The flow concentration tester includes an air intake chamber, a gas mass flow meter, an ultrasonic oxygen concentration sensor, an air intake pump, an air outlet pump and a control and display system. An air intake pipeline is provided at one end of the air intake chamber, and an exhaust pipeline is provided at the other end of the air intake chamber. The air intake pipeline can be connected to the oxygen outlet of the oxygen generator. The air intake pump can inhale the oxygen discharged from the oxygen outlet of the oxygen generator into the air intake chamber of the flow concentration tester, and the air outlet pump can discharge the gas in the air intake chamber of the flow concentration tester through the exhaust pipeline. The gas mass flow meter and the ultrasonic oxygen concentration sensor are respectively arranged on the air intake pipeline. The gas mass flow meter can measure the flow data of the gas in the air intake pipeline, and the ultrasonic oxygen concentration sensor can detect the oxygen concentration data in the air intake pipeline. The control and display system can control the start and stop of the air intake pump and the air outlet pump. The control and display system can also display the flow data and oxygen concentration data of the gas in the air intake pipeline. The control and display system is electrically connected to the communication conversion box to communicate and transmit the flow data and oxygen concentration data.

3. The oxygen concentrator automatic aging test system according to claim 2 is characterized in that: The air suction pump is a double-head air suction pump, which inhales air through two air inlet pipelines. The gas mass flow meter and the ultrasonic oxygen concentration sensor are respectively arranged on the two air inlet pipelines, and the air outlet pump is a single-head air outlet pump.

4. The oxygen concentrator automatic aging test system according to claim 1 is characterized in that: An alarm system (5) is also provided, and the alarm system is electrically connected to the computer for communication. The computer can control the alarm system to issue a corresponding alarm according to the analysis result fed back by the upper computer analysis module.

5. The oxygen concentrator automatic aging test system according to claim 1 is characterized in that: The host computer analysis module can also generate batch measurement files based on the test results according to the test date and test time, and generate a test report based on the measurement files according to the set requirements. A printer (6) is also provided. The printer is connected to the computer, and the computer can print out the test data and the test report through the printer.

6. An oxygen concentrator automatic aging test method using the oxygen concentrator automatic aging test system according to claims 1-5, characterized in that: The steps include: Step 1: The flow rate and concentration tester detects the oxygen flow rate and concentration discharged from the oxygen outlet of the oxygen concentrator to obtain oxygen flow rate data and oxygen concentration data respectively; Step 2: The concentration flow tester organizes the test results of the oxygen concentration data and the oxygen flow data, and then sends them to the communication adapter box through the communication interface; Step 3: The communication adapter box summarizes the test results of multiple concentration flow testers and reports them to the computer; Step 4: The host computer analysis module organizes and stores the oxygen flow data and oxygen concentration data of all oxygen concentrators obtained by the computer to obtain visualized aging data of all oxygen concentrators. The host computer analysis module then automatically analyzes the aging data of each oxygen concentrator and gives the aging results.

7. The oxygen concentrator automatic aging test method according to claim 6, characterized in that: When analyzing the aging data of the oxygen concentrator, the host computer analysis module first determines whether the oxygen concentrator is a traditional oxygen concentrator or a portable oxygen concentrator that continuously discharges gas by the following calculation method, and analyzes the mean square error of the data per unit time based on the measured original oxygen flow data: Where: n is the number of data points; yi is the i-th actual observation; y^ is the i-th predicted value; When the mean square error fluctuation is less than the set range, it is determined that the oxygen concentrator is a traditional oxygen concentrator that continuously outputs gas; When the mean square error fluctuation exceeds the set range, it is determined that the oxygen concentrator is a portable oxygen concentrator with intermittent gas output.

8. The oxygen concentrator automatic aging test method according to claim 7, characterized in that: When the oxygen concentrator is determined to be a portable oxygen concentrator, the data obtained by the gas mass flow meter is the instantaneous flow value of the portable oxygen concentrator. The upper computer analysis module obtains the instantaneous flow through the gas mass flow meter, and calculates the single gas output volume, the maximum single gas output value and the cumulative gas output volume within the set time of the tested portable oxygen concentrator. The single gas output volume is the instantaneous flow obtained by the gas mass flow meter for integration operation. When the tested portable oxygen concentrator is outputting gas, the integral operation threshold is triggered, and the integral operation starts. When the tested portable oxygen concentrator stops outputting gas, the integral operation stops. At this time, the result obtained by the integral calculation is the gas output volume this time. The cumulative gas output volume is obtained by accumulating the data per unit time (minutes), and the FIFO model is used to keep the accumulated data per unit time (minutes) always the latest data, so as to ensure that the minute flow rate is updated in time after each gas output. The algorithm description is: Where: A represents the single gas output; f(x) represents the actual curve of the gas outlet; g(x) represents the trigger threshold; B represents the minute flow rate; k represents the number of gas outflows per minute; The maximum single gas output value (single maximum flow rate) is the maximum value within the integral item, and the cumulative gas output (cumulative flow rate) is the sum of the flow data continuously recorded since the flow concentration detector starts running.

9. The oxygen concentrator automatic aging test method according to claim 8, characterized in that: When the oxygen concentrator is determined to be a traditional oxygen concentrator, the test process data is analyzed as follows: 1). Analyze the stability of oxygen generator operation based on the mean square error data of oxygen concentration and flow rate: If the mean square error data is within the preset range, it means that the performance of the oxygen concentrator meets the standard; If the mean square error data is not within the preset range, it means that the oxygen concentrator performance does not meet the standards; 2). If the mean square error data is not within the preset range, the Z-Score method is used again to perform statistical analysis on the data, and the abnormal data, abnormal difference range and abnormal occurrence time of the oxygen concentrator are directly marked to intuitively reflect the operating status of the oxygen concentrator under test. The algorithm description of the Z-Score method is: Where: X: original data; Average; S: standard deviation; When the oxygen concentrator is determined to be a portable oxygen concentrator, the single gas output volume and the single maximum gas output volume of the oxygen concentrator are substituted into the algorithm of the aforementioned step 1) and step 2), and the operating status of the oxygen concentrator is intuitively judged based on the feedback results.

10. The oxygen concentrator automatic aging test method according to claim 6, characterized in that: The concentration flow tester simulates the active breathing mode of a person by starting and stopping the suction pump to test whether the portable oxygen concentrator can meet the concentration flow of medical standards under different breathing frequencies.

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