Pulse type oxygenerator flow calibration method and system, oxygenerator and readable storage medium

Abstract

The invention discloses a pulse type oxygenerator flow calibration method and system, an oxygenerator and a readable storage medium. The method comprises the steps that a calibration scene is set up, calibration interaction is started, a calibration process is started, a pressure extreme value under a flow gear is obtained, target trigger pressure is configured, flow calibration under the flow gear is completed, flow gear calibration work is completed, and calibration parameters are output. According to the scheme, the division and calibration of the calibration data are more linear and more continuous, so that more stable and accurate control can be realized when the oxygen generator calls the source file data to perform flow calibration and compensation work through the finally output calibration parameters, meanwhile, a complex algorithm is not needed, an expensive chip does not need to be used, and the cost is reduced. And the cost control of the pulse type oxygen generator is also facilitated.

Description

Technical Field

[0001] The present invention relates to the technical field of medical devices, and in particular to a flow calibration method and system for a pulse oxygen concentrator, an oxygen concentrator, and a readable storage medium. Background Art

[0002] The statements in this section merely provide background information related to the present invention and do not necessarily constitute prior art.

[0003] A pulse oxygen concentrator is a device that extracts high-purity oxygen from the air through a specific technology and supplies it to patients / users in the form of pulsed intermittent gas supply. During the use of a pulse oxygen concentrator, accurate and stable control of the pulse flow is very important. By supplying oxygen on demand, the pulse oxygen concentrator can adjust the oxygen flow according to the actual breathing needs of the patient / user, thereby providing better comfort and treatment effects, and optimizing device performance and service life.

[0004] For cost considerations, pulse oxygen concentrators are generally not equipped with expensive gas flow meters as closed-loop control of flow output. The oxygen output flow of pulse oxygen concentrators in the industry is generally open-loop controlled, and the pulse flow of a single oxygen output is controlled by controlling the opening time of the oxygen outlet valve. Since the volume of the oxygen storage tank of the pulse oxygen concentrator is relatively small, a single oxygen injection will cause the pressure of the oxygen storage tank to fluctuate greatly, and the timing of oxygen injection is random. Using a fixed oxygen outlet time will eventually lead to unstable pulse flow.

[0005] In order to solve the problem of unstable pulse flow, existing pulse oxygen concentrator manufacturers use a calibration device to calibrate the oxygen delivery time corresponding to the target flow under different pressures of the oxygen storage tank into a table file in advance. When the oxygen spray is triggered, the firmware reads the current pressure P of the oxygen storage tank, and then looks up the oxygen delivery time T corresponding to this pressure P in the table file to dynamically control the pulse flow. Although this method stabilizes the pulse flow better, the stability and accuracy of the pulse flow still have an error fluctuation of about ±7ml / min (refer to Figure 6 As shown in the figure, it is unable to provide more precise and stable pulse flow control, and will still make patients / users (especially sensitive people) feel uncomfortable during the actual use of the oxygen concentrator.

[0006] Therefore, how to develop a flow calibration method and related technologies that can make the pulse flow output of a pulse oxygen concentrator more stable and more accurate has become a topic to be studied and solved by the present invention. Summary of the invention

[0007] The object of the present invention is to provide a flow calibration method and system for a pulse oxygen concentrator, an oxygen concentrator, and a readable storage medium.

[0008] To achieve the above object, the first aspect of the present invention proposes a method for calibrating the flow rate of a pulse oxygen concentrator, the innovation of which is that the method comprises: Build a calibration scenario and enable calibration interaction, connect the device to be calibrated with the flow metering tooling through the gas path, connect the device to be calibrated and the flow metering tooling with the control device through the communication medium, and enable calibration interaction in which the control device sends command information to the device to be calibrated, receives and processes the response information sent back by the device to be calibrated; After receiving the start calibration command sent by the control device, the device to be calibrated enters the flow calibration mode, which includes the following steps: Obtaining the extreme pressure value under the flow gear, the step of obtaining the extreme pressure value comprises obtaining the maximum pressure value of the oxygen storage tank under the current flow gear after the calibration device closes the oxygen outlet valve, and obtaining the minimum pressure value of the oxygen storage tank under the current flow gear after the calibration device opens the oxygen outlet valve; Configure the target trigger pressure and complete the flow calibration under the flow gear. The control device sets multiple target trigger pressures from the minimum pressure value to the maximum pressure value according to the interval pressure unit and issues a control instruction. After the calibration device receives the control instruction, it closes the oxygen outlet valve until the pressure of the oxygen storage tank reaches the first target trigger pressure. After opening the oxygen outlet valve for a set time, it records the current pressure of the current oxygen storage tank. The control device waits for the pulse flow sampled by the flow metering tool to stabilize and then obtains the current actual pulse flow data. The control device stores the current pulse information to complete the current pulse calibration, and repeats the pulse calibration operation of the next target trigger pressure until the target trigger pressure reaches the maximum pressure value, completing the flow calibration under the current gear; Complete the flow gear calibration and output the calibration parameters, repeat the above steps of starting the calibration process, obtaining the pressure extreme value under the flow gear, configuring the target trigger pressure and completing the flow calibration under the flow gear, until all the flow gears of the oxygen concentrator have completed the flow calibration, and then generate all the calibration information into the source file data embedded in the oxygen concentrator, so that the oxygen concentrator can call the source file data to perform flow calibration and compensation.

[0009] The second aspect of the present invention proposes a pulse oxygen concentrator flow calibration system, which comprises a control device end, equipment to be calibrated and a flow metering tool; the control device end, the equipment to be calibrated and the flow metering tool are used in conjunction with each other and calibration interaction is enabled to complete the pulse oxygen concentrator flow calibration method as described in the first aspect of the present invention.

[0010] A third aspect of the present invention provides an oxygen concentrator, which is calibrated using the pulse oxygen concentrator flow calibration method as described in the first aspect, and the oxygen concentrator has embedded source file data generated by all calibration information.

[0011] A fourth aspect of the present invention provides a readable storage medium having a control device stored thereon. When the control device is executed by a calibration system, the calibration system executes the steps of the method described in the first aspect of the present invention.

[0012] The relevant contents of the present invention are explained as follows: 1. Through the implementation of the above technical solutions of the present invention, the result of simply calibrating the pulse flow rate of the single variable of the oxygen storage tank pressure at the oxygen outlet time point still has a large floating error, which causes the problem of instability of the pulse flow rate. In this way, a pulse oxygen concentrator flow calibration method, a pulse oxygen concentrator flow calibration system, an oxygen concentrator calibrated by the pulse oxygen concentrator flow calibration method, and a readable storage medium storing a control device are innovatively designed. Through the exploration and research of the pulse flow law of the oxygen concentrator, the present invention first builds a calibration scene and enables calibration interaction to ensure that the calibration method process is carried out in an orderly and reliable manner, and then starts the calibration process, obtains the pressure extreme value under the flow gear, and uses the pressure extreme value of the oxygen storage tank under the current flow gear to create basic data conditions for the subsequent flow calibration process, covering a wider range of data, and the calibrated data can be more accurate. Then, the target trigger pressure is configured and the flow calibration under the flow gear is completed, wherein the control device sets multiple target trigger pressures according to the interval pressure unit from the minimum pressure value to the maximum pressure value, The division and calibration of calibration data are more linear and continuous, which provides more convenience for the subsequent generation of source file data and processing of calibration information, and has lower requirements for algorithms. The flow calibration method under the flow gear used makes the final calibration data the relationship between the average pressure Pavg and the pulse flow PulseFlow during the oxygen output time, which can make the pulse flow more stable and the accuracy error lower. The accuracy error is controlled at about ±3ml / min, which is more than doubled compared to the conventional error fluctuation of about ±7ml / min. The accuracy improvement effect is particularly prominent. Finally, the flow gear calibration work is completed and the calibration parameters are output. Since the data provided in the previous sequence covers a wider range, the division and calibration of the calibration data are more linear and continuous. Therefore, the calibration parameters output at the end can allow the oxygen concentrator to achieve more stable and precise control when calling the source file data for flow calibration and compensation. At the same time, no complex algorithm is required, so there is no need to use expensive chips, which is also beneficial to the cost control of the pulse oxygen concentrator.

[0013] 2. In the first aspect of the above technical solution, the steps of building a calibration scene and enabling calibration interaction include the following steps: S100: Build the calibration scene, connect the device to be calibrated with the flow metering tooling, connect the device to be calibrated and the flow metering tooling with the communication medium, and power on the device to be calibrated and the flow metering tooling for operation; the control device sends a command to the device to be calibrated to notify the device to be calibrated to enter the POC working mode, and enter the next stage of the calibration process after receiving the response from the device to be calibrated; enable calibration interaction, based on the device to be calibrated responding within the set response time after the control device sends a command. If the control device does not receive a response, it will try to resend it until the device to be calibrated does not respond after the set number of times, then restart the device to be calibrated. This specific step is used to further ensure the orderly and reliable progress of the calibration method process.

[0014] 3. In the first aspect of the above technical solution, in the step of starting the calibration process and obtaining the extreme pressure value under the flow gear, starting the calibration process includes the following steps: S200, the device to be calibrated enters the flow calibration mode, the control device sends a command to the device to be calibrated, notifying the device to be calibrated to enter the flow calibration mode VCM, the device to be calibrated enters the VCM mode after receiving the command frame, turns off the fixed frequency oxygen output and breathing follow oxygen output functions, and then sends a response frame to the control device. After the control device receives the response frame from the device to be calibrated, the calibration process enters the next stage; S300, setting the working gear of the oxygen generator, the control device sends a command frame to the DTC device to be calibrated, and after the device to be calibrated successfully receives the command, it is set to the current oxygen flow gear, and then sends a response frame to the control device. After the control device successfully receives the response frame sent by the device to be calibrated, the calibration process enters the next stage.

[0015] The above more specific steps further enable the calibration interaction adopted to ensure the accuracy and timeliness of data transmission, making the calibration process and calibration results more accurate.

[0016] 4. In the first aspect of the above technical solution, in the step of starting the calibration process and obtaining the extreme pressure value under the flow gear, obtaining the extreme pressure value under the flow gear includes the following steps: S400, obtain the maximum pressure value under the flow gear, the control device sends a command frame to the device to be calibrated, notifying the device to be calibrated to close the oxygen outlet valve, so as to obtain the maximum pressure value Pmax of the oxygen storage tank under the current flow gear. After successfully receiving the command frame, the device to be calibrated closes the oxygen outlet valve, and then reports the pressure of the current oxygen storage tank at the set interval of seconds. If the difference between the maximum pressure and the minimum pressure of the oxygen storage tank within the set total time is less than the set pressure threshold, the control device marks the minimum pressure within the set total time as the maximum pressure Pmax that may occur in the oxygen storage tank under the current flow gear, and the calibration process enters the next stage; S500, obtain the minimum pressure value under the flow gear, the control device sends a command frame to the device to be calibrated, notifying the device to be calibrated to open the oxygen outlet valve, so as to obtain the minimum pressure Pmin of the oxygen storage tank under the current flow gear. After successfully receiving the command frame, the device to be calibrated opens the oxygen outlet valve, and then reports the pressure of the current oxygen storage tank at an interval of set seconds. If the difference between the maximum pressure and the minimum pressure of the oxygen storage tank within the set total time is less than the set pressure threshold, the control device marks the maximum pressure within the set total time as the minimum pressure Pmin that may occur in the oxygen storage tank under the current flow gear, and the calibration process enters the next stage.

[0017] The above more specific steps can further obtain more accurate maximum pressure value and minimum pressure value data, create better basic data conditions for subsequent flow calibration, cover a wider range of data, and the calibrated data can be more accurate.

[0018] 5. In the first aspect of the above technical solution, in the step of configuring the target trigger pressure and completing the flow calibration under the flow gear, the step of configuring the target trigger pressure includes the following: S600, the control device sets multiple target trigger pressures Pt from the minimum pressure value to the maximum pressure value according to the interval pressure unit, and sends the target trigger pressure to the device to be calibrated through the command frame. After receiving the target trigger pressure frame, the device to be calibrated sends a response frame to the control device, and then closes the oxygen outlet valve and waits for the oxygen storage tank pressure to reach the first target trigger pressure Pt. When the oxygen storage tank pressure reaches the first target trigger pressure Pt, the device to be calibrated opens the oxygen outlet valve for oxygen outlet time T, and records the current oxygen storage tank pressure P2 at the end of the T time. The device to be calibrated records the current process state S and oxygen outlet of the oxygen generator. The pressure P1 at the start time and the pressure P2 at the end time of oxygen delivery are sent to the control device end through data frames. After receiving the data frame, the control device end waits for a period of time for the pulse flow sampled by the flow metering tool to stabilize, and then sends a pulse flow data frame to the flow metering tool. The flow metering tool sends the current actual pulse flow data to the control device end, and the control device end packages the current pulse information into a list and stores it; repeat the pulse calibration operation of the next target trigger pressure until the target trigger pressure reaches the maximum pressure value, complete the flow calibration under the current gear, and the calibration process enters the next stage. The above more specific steps can further improve the division and calibration of calibration data to be more linear and continuous, provide more convenience for the subsequent generation of source file data and processing of calibration information, and have lower requirements on the algorithm. The flow calibration method under the flow gear used makes the final calibration data the relationship between the average pressure and the pulse flow during the oxygen delivery time, which can make the stability of the pulse flow more stable and the accuracy error lower.

[0019] 6. In the first aspect of the above technical solution, the pulse information includes flow level L, process state S of the oxygen generator, oxygen storage tank pressure P1, oxygen storage tank pressure P2, oxygen output time T, and pulse flow V.

[0020] 7. In the first aspect of the above technical solution, the step of completing the flow level calibration and outputting the calibration parameters includes the following steps: S700: Complete the flow rate level calibration work, repeat the above steps S300 to S600 for the calibration process of each working flow rate level in the oxygen concentrator. When the flow rate calibration of all working flow rate levels is completed, exit the flow rate calibration mode, the PC control device notifies the equipment to be calibrated to enter the standby state, and the calibration process enters the next stage; S800: Output calibration parameters. The control device script analyzes the data of all calibration information packaged into a list and generates embedded source files one by one. The oxygen generator directly calls the source file data to calibrate and compensate the flow.

[0021] By implementing the above more specific steps, the calibration parameters output at the end can enable the oxygen concentrator to achieve more stable, accurate and reliable pulse flow control when calling the source file data for flow calibration and compensation.

[0022] 8. In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0023] 9. In the present invention, the terms "middle", "upper", "inner", "front", "back", etc. indicate orientations or positional relationships based on the orientation or positional assembly relationships shown in the accompanying drawings. They are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation. Therefore, they should not be understood as limitations on the present application.

[0024] 10. In addition, the terms "first", "second", etc. are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of this application, "plurality" means at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0025] Due to the application of the above scheme, the present invention has the following advantages and effects compared with the prior art: 1. In the present invention, in view of the problem that the result of simply calibrating the pulse flow rate for the single variable of the oxygen storage tank pressure at the oxygen outlet time point still has a large floating error and causes the instability of the pulse flow rate, a pulse oxygen concentrator flow rate calibration method, a pulse oxygen concentrator flow rate calibration system, an oxygen concentrator calibrated by the pulse oxygen concentrator flow rate calibration method, and a readable storage medium storing a control device are innovatively designed to achieve accurate calibration of the pulse flow rate.

[0026] 2. In the present invention, through the exploration and research of the pulse flow law of the oxygen concentrator, the present invention first builds a calibration scene and enables calibration interaction to ensure that the calibration method process is carried out in an orderly and reliable manner, and then starts the calibration process, obtains the pressure extreme value under the flow gear, and uses the pressure extreme value of the oxygen storage tank under the current flow gear to create basic data conditions for the subsequent flow calibration process, covering a wider range of data, and the calibrated data can be more accurate. Then, the target trigger pressure is configured and the flow calibration under the flow gear is completed, wherein the control device sets multiple target trigger pressures from the minimum pressure value to the maximum pressure value according to the interval pressure unit, and the division and calibration of the calibration data are more linear and continuous, which provides more convenience for the subsequent calibration information to generate source file data and processing, and has lower requirements on the algorithm. The flow calibration under the flow gear used is The method makes the final calibration data the relationship between the average pressure Pavg and the pulse flow PulseFlow during the oxygen delivery time, which can make the pulse flow more stable and the accuracy error lower. The accuracy error is controlled at about ±3ml / min, which is more than doubled compared to the conventional error fluctuation of about ±7ml / min. The accuracy improvement effect is particularly prominent. Finally, the flow gear calibration work is completed and the calibration parameters are output. Since the data provided in the previous sequence covers a wider range, the division and calibration of the calibration data are more linear and continuous. Therefore, the calibration parameters output at the end can allow the oxygen concentrator to achieve more stable and precise control when calling the source file data for flow calibration and compensation. At the same time, there is no need for complex algorithms, so there is no need to use expensive chips, which is also beneficial to the cost control of the pulse oxygen concentrator. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Attached Figure 1 It is a schematic diagram of the flow chart of the method for calibrating the flow rate of a pulse oxygen concentrator according to an embodiment of the present invention; Attached Figure 2 It is a schematic diagram of a specific flow chart of a method for calibrating flow rate of a pulse oxygen concentrator according to an embodiment of the present invention; Attached Figure 3 It is a pulse flow calibration timing diagram of the flow calibration method of the pulse oxygen generator according to an embodiment of the present invention; Attached Figure 4The embodiment of the present invention is a pressure change diagram of the oxygen storage tank at different oxygen production process stages and the same oxygen output time; Attached Figure 5 Part of the parameters of the calibration data table output by the flow calibration system of the pulse oxygen generator according to the embodiment of the present invention; Attached Figure 6 is a calibration error diagram for flow control using existing technology; Attached Figure 7 This is a calibration error diagram for flow control using the technology of the present invention. DETAILED DESCRIPTION

[0028] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present application, so the present application is not limited by the specific embodiments disclosed below.

[0029] The present invention aims to solve the problem that the result of pulse flow calibration based on the single variable of oxygen storage tank pressure at the oxygen outlet time point still has a large floating error, which causes the instability of pulse flow. The present invention innovatively designs a pulse oxygen concentrator flow calibration method, a pulse oxygen concentrator flow calibration system, an oxygen concentrator calibrated by the pulse oxygen concentrator flow calibration method, and a readable storage medium storing a control device. By exploring and studying the pulse flow law of the oxygen concentrator, accurate calibration of the pulse flow is achieved.

[0030] Embodiment 1: Embodiment 1 of the present invention proposes a flow calibration method for a pulse oxygen concentrator, which is used for steady flow control of a proportional valve. The method includes: Build a calibration scenario and enable calibration interaction, connect the device to be calibrated with the flow metering tooling through the gas path, connect the device to be calibrated and the flow metering tooling with the control device through the communication medium, and enable calibration interaction in which the control device sends command information to the device to be calibrated, receives and processes the response information sent back by the device to be calibrated; After receiving the start calibration command sent by the control device, the device to be calibrated enters the flow calibration mode, which includes the following steps: Obtaining the extreme pressure value under the flow gear, the step of obtaining the extreme pressure value comprises obtaining the maximum pressure value of the oxygen storage tank under the current flow gear after the calibration device closes the oxygen outlet valve, and obtaining the minimum pressure value of the oxygen storage tank under the current flow gear after the calibration device opens the oxygen outlet valve; Configure the target trigger pressure and complete the flow calibration under the flow gear. The control device sets multiple target trigger pressures from the minimum pressure value to the maximum pressure value according to the interval pressure unit and issues a control instruction. After the calibration device receives the control instruction, it closes the oxygen outlet valve until the pressure of the oxygen storage tank reaches the first target trigger pressure. After opening the oxygen outlet valve for a set time, it records the current pressure of the current oxygen storage tank. The control device waits for the pulse flow sampled by the flow metering tool to stabilize and then obtains the current actual pulse flow data. The control device stores the current pulse information to complete the current pulse calibration, and repeats the pulse calibration operation of the next target trigger pressure until the target trigger pressure reaches the maximum pressure value, completing the flow calibration under the current gear; Complete the flow gear calibration and output the calibration parameters, repeat the above steps of starting the calibration process, obtaining the pressure extreme value under the flow gear, configuring the target trigger pressure and completing the flow calibration under the flow gear, until all the flow gears of the oxygen concentrator have completed the flow calibration, and then generate all the calibration information into the source file data embedded in the oxygen concentrator, so that the oxygen concentrator can call the source file data to perform flow calibration and compensation.

[0031] In the first embodiment of the present invention, through the exploration and research of the pulse flow law of the oxygen generator, the present invention first builds a calibration scene and enables calibration interaction to ensure that the calibration method process is carried out in an orderly and reliable manner, and then starts the calibration process, obtains the pressure extreme value under the flow gear, and uses the pressure extreme value of the oxygen storage tank under the current flow gear to create basic data conditions for the subsequent flow calibration process, covering a wider range of data, and the calibrated data can be more accurate. Then, the target trigger pressure is configured and the flow calibration under the flow gear is completed, wherein the control device sets multiple target trigger pressures from the minimum pressure value to the maximum pressure value according to the interval pressure unit, and the division and calibration of the calibration data are more linear and continuous, which provides more convenience for the subsequent calibration information to generate source file data and processing, and has lower requirements on the algorithm. The flow calibration under the flow gear used The method makes the final calibration data the relationship between the average pressure Pavg and the pulse flow PulseFlow during the oxygen delivery time, which can make the pulse flow more stable and the accuracy error lower. The accuracy error is controlled at about ±3ml / min, which is more than doubled compared to the conventional error fluctuation of about ±7ml / min. The accuracy improvement effect is particularly prominent. Finally, the flow gear calibration work is completed and the calibration parameters are output. Since the data provided in the previous sequence covers a wider range, the division and calibration of the calibration data are more linear and continuous. Therefore, the calibration parameters output at the end can enable the oxygen concentrator to achieve more stable and precise control when calling the source file data for flow calibration and compensation. At the same time, there is no need for complex algorithms, so there is no need to use expensive chips, which is also beneficial to the cost control of the pulse oxygen concentrator.

[0032] Specifically, the method flow of the pulse oxygen generator flow calibration method in the embodiment of the present invention can refer to the following steps: The steps to build a calibration scene and enable calibration interaction include the following steps: S100: Build the calibration scene, connect the device to be calibrated with the flow metering tooling, connect the device to be calibrated and the flow metering tooling with the communication medium, and power on the device to be calibrated and the flow metering tooling for operation; the control device sends a command to the device to be calibrated to notify the device to be calibrated to enter the POC working mode, and enter the next stage of the calibration process after receiving the response from the device to be calibrated; enable calibration interaction, based on the device to be calibrated responding within the set response time after the control device sends a command. If the control device does not receive a response, it will try to resend it until the device to be calibrated does not respond after the set number of times, then restart the device to be calibrated. This specific step is used to further ensure the orderly and reliable progress of the calibration method process.

[0033] Starting the calibration process consists of the following steps: S200, the device to be calibrated enters the flow calibration mode, the control device sends a command to the device to be calibrated, notifying the device to be calibrated to enter the flow calibration mode VCM, the device to be calibrated enters the VCM mode after receiving the command frame, turns off the fixed frequency oxygen output and breathing follow oxygen output functions, and then sends a response frame to the control device. After the control device receives the response frame from the device to be calibrated, the calibration process enters the next stage; S300, setting the working gear of the oxygen generator, the control device sends a command frame to the DTC device to be calibrated, and after the device to be calibrated successfully receives the command, it is set to the current oxygen flow gear, and then sends a response frame to the control device. After the control device successfully receives the response frame sent by the device to be calibrated, the calibration process enters the next stage.

[0034] The above more specific steps further enable the calibration interaction adopted to ensure the accuracy and timeliness of data transmission, making the calibration process and calibration results more accurate.

[0035] Obtaining the pressure extreme value under the flow range includes the following steps: S400, obtain the maximum pressure value under the flow gear, the control device sends a command frame to the device to be calibrated, notifying the device to be calibrated to close the oxygen outlet valve, so as to obtain the maximum pressure value Pmax of the oxygen storage tank under the current flow gear. After successfully receiving the command frame, the device to be calibrated closes the oxygen outlet valve, and then reports the pressure of the current oxygen storage tank at the set interval of seconds. If the difference between the maximum pressure and the minimum pressure of the oxygen storage tank within the set total time is less than the set pressure threshold, the control device marks the minimum pressure within the set total time as the maximum pressure Pmax that may occur in the oxygen storage tank under the current flow gear, and the calibration process enters the next stage; S500, obtain the minimum pressure value under the flow gear, the control device sends a command frame to the device to be calibrated, notifying the device to be calibrated to open the oxygen outlet valve, so as to obtain the minimum pressure Pmin of the oxygen storage tank under the current flow gear. After successfully receiving the command frame, the device to be calibrated opens the oxygen outlet valve, and then reports the pressure of the current oxygen storage tank at an interval of set seconds. If the difference between the maximum pressure and the minimum pressure of the oxygen storage tank within the set total time is less than the set pressure threshold, the control device marks the maximum pressure within the set total time as the minimum pressure Pmin that may occur in the oxygen storage tank under the current flow gear, and the calibration process enters the next stage.

[0036] The above more specific steps can further obtain more accurate maximum pressure value and minimum pressure value data, create better basic data conditions for subsequent flow calibration, cover a wider range of data, and the calibrated data can be more accurate.

[0037] In the steps of configuring the target trigger pressure and completing the flow calibration under the flow range, the steps of configuring the target trigger pressure include the following: S600, configure the target trigger pressure. The control device sets multiple target trigger pressures Pt from the minimum pressure value to the maximum pressure value according to the interval pressure unit, and sends the target trigger pressure to the device to be calibrated through the command frame. After receiving the target trigger pressure frame, the device to be calibrated sends a response frame to the control device, and then closes the oxygen outlet valve and waits for the oxygen storage tank pressure to reach the first target trigger pressure Pt. When the oxygen storage tank pressure reaches the first target trigger pressure Pt, the device to be calibrated opens the oxygen outlet valve for oxygen outlet time T, and records the current oxygen storage tank pressure P2 at the end of the T time. The device to be calibrated records the current process status of the oxygen concentrator. The state S, the pressure P1 at the start of oxygen outlet, and the pressure P2 at the end of oxygen outlet are sent to the control device end through a data frame. After receiving the data frame, the control device end waits for a period of time for the pulse flow sampled by the flow metering tool to stabilize, and then sends a pulse flow data frame to the flow metering tool. The flow metering tool sends the current actual pulse flow data to the control device end, and the control device end packages the current pulse information into a list and stores it; repeat the pulse calibration operation of the next target trigger pressure until the target trigger pressure reaches the maximum pressure value, complete the flow calibration under the current gear, and the calibration process enters the next stage. The above more specific steps can further improve the division and calibration of calibration data to be more linear and continuous, provide more convenience for the subsequent generation of source file data and processing of calibration information, and have lower requirements on the algorithm. The flow calibration method under the flow gear used makes the final calibration data the relationship between the average pressure and the pulse flow during the oxygen outlet time, which can make the stability of the pulse flow more stable and the accuracy error lower. Specifically, the pulse information includes the flow level L, the process state S of the oxygen concentrator, the oxygen storage tank pressure P1, the oxygen storage tank pressure P2, the oxygen output time T, and the pulse flow V.

[0038] The steps of completing the flow level calibration and outputting the calibration parameters include the following steps: S700: Complete the flow rate level calibration work, repeat the above steps S300 to S600 for the calibration process of each working flow rate level in the oxygen concentrator. When the flow rate calibration of all working flow rate levels is completed, exit the flow rate calibration mode, the PC control device notifies the equipment to be calibrated to enter the standby state, and the calibration process enters the next stage; S800: Output calibration parameters. The control device script analyzes the data of all calibration information packaged into a list and generates embedded source files one by one. The oxygen generator directly calls the source file data to calibrate and compensate the flow.

[0039] By implementing the above more specific steps, the calibration parameters output at the end can enable the oxygen concentrator to achieve more stable, accurate and reliable pulse flow control when calling the source file data for flow calibration and compensation.

[0040] Embodiment 2. In Embodiment 2 of the present invention, a pulse oxygen concentrator flow calibration system is proposed, and the calibration system includes a control device end, a device to be calibrated, and a flow metering tool; the control device end, the device to be calibrated, and the flow metering tool are used in conjunction with each other and calibration interaction is enabled to complete the pulse oxygen concentrator flow calibration method as described in Embodiment 1 of the present invention.

[0041] Embodiment 3: Embodiment 3 of the present invention proposes an oxygen concentrator, which is calibrated using the pulse oxygen concentrator flow calibration method as described in Embodiment 1. The oxygen concentrator has embedded source file data generated by all calibration information.

[0042] Embodiment 4: Embodiment 4 of the present invention proposes a readable storage medium, on which a control device is stored. When the control device is executed by a calibration system, the calibration system executes the steps of the method described in Embodiment 1 of the present invention.

[0043] Those skilled in the art can understand that the operation of the control system in the above-mentioned embodiment method can be completed by instructing the relevant hardware (proportional valve) through a program, and the program is stored in a readable storage medium, including a number of instructions for making a device (which can be a single-chip microcomputer, chip, etc.) or a processor (processor) perform the operations performed by the main control unit in each embodiment of the present application. The aforementioned readable storage medium includes: U disk, mobile hard disk, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), disk or optical disk and other media that can store program codes.

[0044] Compared with the existing pulse flow calibration technology of pulse oxygen generator, the result of pulse flow calibration of the single variable of oxygen storage tank pressure P1 at the oxygen outlet time point still has a large floating error, resulting in the instability of pulse flow. The pulse flow calibration method proposed in the present invention includes the oxygen storage tank pressure P1 at the start of oxygen outlet and the oxygen storage tank pressure P2 at the end of oxygen outlet into the calibration data. Since the pulse flow of the pulse oxygen generator is relatively small, the maximum opening time of a single oxygen outlet valve is about 200ms. Although the relationship between pressure and flow is not a linear relationship, it can be approximately regarded as a linear relationship in a short time, such as Figure 4 As shown in the figure, in the adsorption stage and the back-blowing stage, for the same oxygen storage time T, the pressure change ΔP of the oxygen storage tank is quite different. In the adsorption stage, since the back-blowing valve is in a closed state, all the compressor flows enter the oxygen storage tank, so the pressure change ΔP is only about 14KPa. In the back-blowing stage, the back-blowing valve is opened, and a part of the compressor flow is released to the low-pressure screen barrel through the back-blowing valve. The flow to the oxygen storage tank is insufficient, resulting in a large pressure change ΔP of the oxygen storage tank, which is about 36KPa. . The average pressure within the oxygen injection time T can be calculated according to Pavg=(P1+P2) / 2, so the final calibrated data is the relationship between the average pressure Pavg and the pulse flow PulseFlow during the oxygen output time. For example, under the average pressure of Pavg=30kpa, the oxygen output time T=60ms, and the pulse flow PulseFlow=13ml / min. Then calculate the average pressure Pavg = 30kpa and the flow rate per unit time is ΔFlow = PulseFlow / T. Finally, an excel file will be generated in the calibration data table, which is the calibration data (such as Figure 7 shown).

[0045] The flow calibration method of the pulse oxygen generator of the present invention is further described below using one specific implementation method.

[0046] S100: Build a calibration scenario, connect the equipment to be calibrated and the flow metering tooling with gas lines, connect the equipment to be calibrated and the flow metering tooling with communication media to the control device end, so that the equipment to be calibrated and the flow metering tooling are powered on and ready for operation; the control device sends a command to the equipment to be calibrated to notify the equipment to be calibrated to enter the POC working mode, and enter the next stage of the calibration process after receiving a response from the equipment to be calibrated; enable calibration interaction, based on the equipment to be calibrated responding within the set response time after the control device sends a command. If no response is received, the control device tries to resend the command until the equipment to be calibrated does not respond after the set number of times (N times, which can be set to 5 times, 6 times, etc.), then the equipment to be calibrated is restarted.

[0047] S200, the device to be calibrated enters the flow calibration mode, the control device sends a command to the device to be calibrated, notifying the device to be calibrated to enter the flow calibration mode VCM, the device to be calibrated enters the VCM mode after receiving the command frame, turns off the fixed-frequency oxygen output and breathing-following oxygen output functions, and then sends a response frame to the control device. After the control device receives the response frame from the device to be calibrated, the calibration process enters the next stage.

[0048] S300, setting the working gear of the oxygen generator, the control device sends a command frame to the DTC device to be calibrated, and after the device to be calibrated successfully receives the command, it is set to the current oxygen flow gear, which can be set to gear 1 first, and then sends a response frame to the control device. After the control device successfully receives the response frame sent by the device to be calibrated, the calibration process enters the next stage.

[0049] S400, obtain the maximum pressure value under the flow gear, the control device sends a command frame to the device to be calibrated, and notifies the device to be calibrated to close the oxygen outlet valve, which is used to obtain the maximum pressure value Pmax of the oxygen storage tank under the current flow gear. After successfully receiving the command frame, the device to be calibrated closes the oxygen outlet valve, and then reports the pressure of the current oxygen storage tank at a set interval of seconds (it can be set to an interval of 1 second, the range can be 0.2 seconds-3 seconds, or 0.5 seconds, 1.5 seconds, 2 seconds, etc.). If the difference between the maximum pressure and the minimum pressure of the oxygen storage tank within the set total time is less than the set pressure threshold (the pressure threshold can be set to 2 Kpa, the range can be 0.2Kpa-5Kpa, and can also be 0.2 Kpa, 0.5 Kpa, 1 Kpa, 1.5 Kpa, 2.5 Kpa, 5 Kpa, etc.), the control device will mark the minimum pressure within the set total time (the set total time can be set to 10 seconds, the range can be 2 seconds-100 seconds, or it can be 2 seconds, 5 seconds, 20 seconds, 30 seconds, 50 seconds, 80 seconds, 100 seconds, etc.) as the maximum pressure Pmax that may appear in the oxygen storage tank under the current flow rate gear, and the calibration process will enter the next stage.

[0050] S500, obtain the minimum pressure value under the flow gear, the control device sends a command frame to the device to be calibrated, notifying the device to be calibrated to open the oxygen outlet valve, so as to obtain the minimum pressure Pmin of the oxygen storage tank under the current flow gear. After successfully receiving the command frame, the device to be calibrated opens the oxygen outlet valve, and then reports the pressure of the current oxygen storage tank at the set interval of seconds (can be set to 1 second, the rest is the same as above). If the difference between the maximum pressure and the minimum pressure of the oxygen storage tank within the set total time is less than the set pressure threshold (can be set to 2Kpa, the rest is the same as above), the control device marks the maximum pressure within the set total time (can be set to 10 seconds, the rest is the same as above) as the minimum pressure Pmin that may appear in the oxygen storage tank under the current flow gear, and the calibration process enters the next stage.

[0051] S600, the control device sets multiple target trigger pressures Pt from the minimum pressure value to the maximum pressure value according to the interval pressure unit (the interval pressure unit can be set to 1 Kpa, the range can be 0.21Kpa-5 Kpa, and can also be 0.2 Kpa, 0.5 Kpa, 1 Kpa, 1.5 Kpa, 2.5 Kpa, 5 Kpa, etc.), and sends the target trigger pressure to the device to be calibrated through the command frame. After receiving the target trigger pressure frame, the device to be calibrated sends a response frame to the control device, and then closes the oxygen outlet valve and waits for the oxygen storage tank pressure to reach the first target trigger pressure Pt. When the oxygen storage tank pressure reaches the first target trigger pressure Pt, the device to be calibrated opens the oxygen outlet valve for the oxygen outlet time T, and records the current oxygen storage tank pressure P2 in the last 1ms of the T time. The device to be calibrated records the current process state S of the oxygen generator, the pressure P1 at the start of oxygen outlet, and the pressure P2 at the end of oxygen outlet. The engraved pressure P2 is sent to the control device end through a data frame. After receiving this data frame, the control device end waits for a period of time (500ms) for the pulse flow sampled by the flow metering tool to stabilize, and then sends a pulse flow data frame to the flow metering tool. The flow metering tool sends the current actual pulse flow data to the control device end, and the control device end packages the current pulse information into a list and stores it; repeat the pulse calibration operation of the next target trigger pressure until the target trigger pressure reaches the maximum pressure value, complete the flow calibration under the current gear, and the calibration process enters the next stage. The above more specific steps can further improve the division and calibration of calibration data to be more linear and continuous, provide more convenience for the subsequent generation of source file data and processing of calibration information, and have lower requirements on the algorithm. The flow calibration method under the flow gear used makes the final calibration data the relationship between the average pressure and the pulse flow during the oxygen outlet time, which can make the stability of the pulse flow more stable and the accuracy error lower. Specifically, the pulse information includes the flow level L, the process state S of the oxygen concentrator, the oxygen storage tank pressure P1, the oxygen storage tank pressure P2, the oxygen output time T, and the pulse flow V.

[0052] S700: Complete the flow rate level calibration work, repeat the above steps S300 to S600 for the calibration process of each working flow rate level in the oxygen concentrator. When the flow rate calibration of all working flow rate levels is completed, exit the flow rate calibration mode, the PC control device notifies the equipment to be calibrated to enter the standby state, and the calibration process enters the next stage; S800: Output calibration parameters. The control device script analyzes the data of all calibration information packaged into a list and generates embedded source files one by one. The oxygen generator directly calls the source file data to calibrate and compensate the flow.

[0053] Through the implementation of the present invention, Figure 6 Calibration error diagram of flow control using existing technology, Figure 7 By comparing the calibration error diagram of flow control using the technology of the present invention, it can be seen that the calibration error of flow control using the prior art is about ±7ml / min, while the calibration error of flow control using the technology of the present invention is only about ±3ml / min, thereby achieving more stable and accurate pulse flow control of the pulse oxygen concentrator and achieving the purpose of the present invention.

[0054] The above embodiments are only for illustrating the technical concept and features of the present invention, and their purpose is to enable people familiar with the technology to understand the content of the present invention and implement it accordingly, and they cannot be used to limit the protection scope of the present invention. Any equivalent changes or modifications made according to the spirit of the present invention should be included in the protection scope of the present invention.

Claims

1. A method for calibrating the flow rate of a pulse oxygen concentrator, characterized in that: The method includes: Build a calibration scenario and enable calibration interaction, connect the device to be calibrated with the flow metering tooling through the gas path, connect the device to be calibrated and the flow metering tooling with the control device through the communication medium, and enable calibration interaction in which the control device sends command information to the device to be calibrated, receives and processes the response information sent back by the device to be calibrated; After receiving the start calibration command sent by the control device, the device to be calibrated enters the flow calibration mode, which includes the following steps: Obtaining the extreme pressure value under the flow gear, the step of obtaining the extreme pressure value comprises obtaining the maximum pressure value of the oxygen storage tank under the current flow gear after the calibration device closes the oxygen outlet valve, and obtaining the minimum pressure value of the oxygen storage tank under the current flow gear after the calibration device opens the oxygen outlet valve; Configure the target trigger pressure and complete the flow calibration under the flow gear. The control device sets multiple target trigger pressures from the minimum pressure value to the maximum pressure value according to the interval pressure unit and issues a control instruction. After the calibration device receives the control instruction, it closes the oxygen outlet valve until the pressure of the oxygen storage tank reaches the first target trigger pressure. After opening the oxygen outlet valve for a set time, it records the current pressure of the current oxygen storage tank. The control device waits for the pulse flow sampled by the flow metering tool to stabilize and then obtains the current actual pulse flow data. The control device stores the current pulse information to complete the current pulse calibration, and repeats the pulse calibration operation of the next target trigger pressure until the target trigger pressure reaches the maximum pressure value, completing the flow calibration under the current gear; Complete the flow gear calibration and output the calibration parameters, repeat the above steps of starting the calibration process, obtaining the pressure extreme value under the flow gear, configuring the target trigger pressure and completing the flow calibration under the flow gear, until all the flow gears of the oxygen concentrator have completed the flow calibration, and then generate all the calibration information into the source file data embedded in the oxygen concentrator, so that the oxygen concentrator can call the source file data to perform flow calibration and compensation.

2. The pulse oxygen concentrator flow calibration method according to claim 1, characterized in that: The steps to build a calibration scene and enable calibration interaction include the following steps: S100: Build a calibration scene, connect the device to be calibrated and the flow metering tooling with gas lines, connect the device to be calibrated and the flow metering tooling to the control device end with a communication medium, and power on the device to be calibrated and the flow metering tooling to wait for operation; the control device sends a command to the device to be calibrated to notify the device to be calibrated to enter the POC working mode, and enters the next stage of the calibration process after receiving a response from the device to be calibrated; Enable calibration interaction, based on the device to be calibrated responding within the set response time after the control device sends a command. If no response is received, the control device will try to resend the command. If the device to be calibrated does not respond after the set number of times, the device to be calibrated will be restarted.

3. The flow calibration method of a pulse oxygen concentrator according to claim 1, characterized in that: Starting the calibration process consists of the following steps: S200, the device to be calibrated enters the flow calibration mode, the control device sends a command to the device to be calibrated, notifying the device to be calibrated to enter the flow calibration mode VCM, the device to be calibrated enters the VCM mode after receiving the command frame, turns off the fixed frequency oxygen output and breathing follow oxygen output functions, and then sends a response frame to the control device. After the control device receives the response frame from the device to be calibrated, the calibration process enters the next stage; S300, setting the working gear of the oxygen generator, the control device sends a command frame to the DTC device to be calibrated, and after the device to be calibrated successfully receives the command, it is set to the current oxygen flow gear, and then sends a response frame to the control device. After the control device successfully receives the response frame sent by the device to be calibrated, the calibration process enters the next stage.

4. The flow calibration method of the pulse oxygen concentrator according to claim 3, characterized in that: In the step of obtaining the extreme pressure value under the flow rate gear, obtaining the extreme pressure value under the flow rate gear includes the following steps: S400, obtain the maximum pressure value under the flow gear, the control device sends a command frame to the device to be calibrated, notifying the device to be calibrated to close the oxygen outlet valve, so as to obtain the maximum pressure value Pmax of the oxygen storage tank under the current flow gear. After successfully receiving the command frame, the device to be calibrated closes the oxygen outlet valve, and then reports the pressure of the current oxygen storage tank at the set interval of seconds. If the difference between the maximum pressure and the minimum pressure of the oxygen storage tank within the set total time is less than the set pressure threshold, the control device marks the minimum pressure within the set total time as the maximum pressure Pmax that may occur in the oxygen storage tank under the current flow gear, and the calibration process enters the next stage; S500, obtain the minimum pressure value under the flow gear, the control device sends a command frame to the device to be calibrated, notifying the device to be calibrated to open the oxygen outlet valve, so as to obtain the minimum pressure Pmin of the oxygen storage tank under the current flow gear. After successfully receiving the command frame, the device to be calibrated opens the oxygen outlet valve, and then reports the pressure of the current oxygen storage tank at an interval of set seconds. If the difference between the maximum pressure and the minimum pressure of the oxygen storage tank within the set total time is less than the set pressure threshold, the control device marks the maximum pressure within the set total time as the minimum pressure Pmin that may occur in the oxygen storage tank under the current flow gear, and the calibration process enters the next stage.

5. The method for calibrating the flow rate of a pulse oxygen concentrator according to claim 4, characterized in that: In the steps of configuring the target trigger pressure and completing the flow calibration under the flow range, the steps of configuring the target trigger pressure include the following: S600, the control device sets multiple target trigger pressures Pt from the minimum pressure value to the maximum pressure value according to the interval pressure unit, and sends the target trigger pressure to the device to be calibrated through the instruction frame. After receiving the target trigger pressure frame, the device to be calibrated sends a response frame to the control device, and then closes the oxygen outlet valve and waits for the oxygen storage tank pressure to reach the first target trigger pressure Pt. When the oxygen storage tank pressure reaches the first target trigger pressure Pt, the device to be calibrated opens the oxygen outlet valve for the oxygen outlet time T, and records the current oxygen storage tank pressure P2 at the end of the T time. The device to be calibrated sends the current process state S of the oxygen generator, the oxygen outlet start time pressure P1, and the oxygen outlet end time pressure P2 to the control device through a data frame. After receiving this data frame, the control device waits for a period of time for the pulse flow sampled by the flow metering tool to stabilize, and then sends a pulse flow reading data frame to the flow metering tool. The flow metering tool sends the current actual pulse flow data to the control device, and the control device packages the current pulse information into a list and stores it; Repeat the pulse calibration operation of the next target trigger pressure until the target trigger pressure reaches the maximum pressure value, complete the flow calibration under the current gear, and the calibration process enters the next stage.

6. The method for calibrating the flow rate of a pulse oxygen concentrator according to claim 5, characterized in that: The pulse information includes the flow level L, the process state S of the oxygen concentrator, the oxygen storage tank pressure P1, the oxygen storage tank pressure P2, the oxygen output time T, and the pulse flow V.

7. The method for calibrating the flow rate of a pulse oxygen concentrator according to claim 5, characterized in that: The steps of completing the flow level calibration and outputting the calibration parameters include the following steps: S700: Complete the flow rate level calibration work, repeat the above steps S300 to S600 for the calibration process of each working flow rate level in the oxygen concentrator. When the flow rate calibration of all working flow rate levels is completed, exit the flow rate calibration mode, the PC control device notifies the equipment to be calibrated to enter the standby state, and the calibration process enters the next stage; S800: Output calibration parameters. The control device script analyzes the data of all calibration information packaged into a list and generates embedded source files one by one. The oxygen generator directly calls the source file data to calibrate and compensate the flow.

8. A pulse oxygen concentrator flow calibration system, characterized in that: The calibration system comprises a control device end, equipment to be calibrated and a flow metering tool; the control device end, equipment to be calibrated and flow metering tool are used in conjunction with each other and calibration interaction is enabled to complete the pulse oxygen concentrator flow calibration method as described in any one of claims 1 to 7.

9. An oxygen concentrator, characterized in that: The oxygen concentrator is calibrated using the pulse oxygen concentrator flow calibration method according to any one of claims 1 to 7, and the oxygen concentrator has embedded source file data generated by all calibration information.

10. A readable storage medium, characterized in that: The readable storage medium stores a control device, and when the control device is executed by the calibration system, the calibration system executes the steps of the method according to any one of claims 1 to 7.

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