An automatic test method for performance verification of a vehicle-mounted oxygen generator

Abstract

This invention discloses an automated testing method for performance verification of vehicle-mounted oxygen concentrators, belonging to the field of performance testing of vehicle-mounted oxygen concentrators. The method includes controlling the vehicle-mounted oxygen concentrator to perform an output flow control target adjustment process, collecting operational response parameters during the response process; determining the corresponding stage division time based on the stable state of the variation amplitude of each operational response parameter, and dividing the output parameter variation stage and the output parameter stabilization stage; determining the operational response parameter stabilization time based on the time interval between the response start time and the corresponding stage division time for each operational response parameter; determining the operational response parameter fluctuation amount based on the operational response parameters within the output parameter stabilization stage; determining dynamic response performance indicators and stable output performance indicators based on the stabilization time and fluctuation amount, and determining the vehicle-mounted oxygen concentrator performance verification result based on the corresponding evaluation results. This invention enables automated testing of the output adjustment process of vehicle-mounted oxygen concentrators, improving the comprehensiveness and accuracy of performance verification.

Description

Technical Field

[0001] This invention relates to the field of vehicle-mounted oxygen generator testing technology, specifically to an automated testing method for performance verification of vehicle-mounted oxygen generators. Background Technology

[0002] With the increasing application of mobile oxygen concentrators in mobile oxygen supply scenarios, higher demands are placed on the performance verification of their output regulation process. During operation, mobile oxygen concentrators need to adjust their output flow control targets according to actual oxygen supply needs, gradually changing operational response parameters such as oxygen concentration, output flow rate, and output pressure from their current operating state to a new stable output state. Therefore, it is necessary to test the operational response process after adjusting the output flow control targets to evaluate the output regulation performance of the mobile oxygen concentrator.

[0003] In current performance verification of vehicle-mounted oxygen concentrators, the target output flow rate is typically adjusted, and operational response parameters such as oxygen concentration, output flow rate, and output pressure are collected to monitor the adjusted operating status. However, because the oxygen concentration, output flow rate, and output pressure parameters are affected by the internal adjustment process of the vehicle-mounted oxygen concentrator, the time it takes for each operational response parameter to reach a steady state varies. Existing testing methods struggle to accurately determine the steady-state stage for each operational response parameter, resulting in an inability to accurately obtain the response time corresponding to the adjustment process of the vehicle-mounted oxygen concentrator's output flow rate control target.

[0004] Meanwhile, existing testing methods typically evaluate the output status based on changes in the adjusted operating response parameters, lacking a comprehensive analysis of the fluctuation levels of oxygen concentration, output flow, and output pressure parameters during the stable phase of the output parameters. This makes it impossible to accurately evaluate the dynamic response performance and stable output performance of the vehicle-mounted oxygen generator after adjusting the output flow control target. Summary of the Invention

[0005] To address the aforementioned issues, this invention proposes an automated testing method for verifying the performance of vehicle-mounted oxygen concentrators. This method collects oxygen concentration, output flow, and output pressure parameters during the process of adjusting the output flow control target of the vehicle-mounted oxygen concentrator. Based on the changes in the operational response parameters, it determines the parameter change phase and the parameter stabilization phase. Furthermore, it constructs performance evaluation indicators based on the stable response time and stable output fluctuation, thereby achieving quantitative verification of the dynamic response performance and stable output performance of the vehicle-mounted oxygen concentrator.

[0006] To achieve the above objectives, this invention provides an automated testing method for performance verification of vehicle-mounted oxygen generators, comprising the following steps: The output flow control target of the vehicle-mounted oxygen generator is adjusted from the initial flow control value to the target flow control value. The moment when the adjustment of the target flow control value begins is determined as the response start time corresponding to the output flow control target adjustment response process. The response start time is used as the sampling start point, and the operating response parameters corresponding to each sampling time in the response process after the flow control target adjustment are collected according to the preset sampling period. The operating response parameters include oxygen concentration parameters, output flow parameters, and output pressure parameters. Based on the change amplitude of the operating response parameters at each sampling time, the stable state determination result of the change amplitude of the operating response parameters at each sampling time is determined. The number of consecutive samples in which the stable state determination result of the change amplitude of the operating response parameters is stable is counted in the order of sampling time. The number of consecutive samples in which the stable state determination result of the change amplitude of the operating response parameters is stable is compared with the corresponding stable state determination sampling number to determine the stage division time corresponding to the operating response parameters. Based on the stage division time corresponding to the operating response parameters, the output parameter change stage and output parameter stability stage corresponding to the operating response parameters are determined. Based on the time interval between the response start time and the stage division time corresponding to each operating response parameter, the oxygen concentration stabilization time, output flow stabilization time, and output pressure stabilization time are determined respectively. Based on the operating response parameters corresponding to each sampling time during the stable phase of the output parameters, the maximum and minimum parameter values ​​of each operating response parameter during the stable phase of the output parameters are calculated respectively. Based on the difference between the maximum and minimum parameter values, the fluctuation of oxygen concentration, the fluctuation of output flow rate, and the fluctuation of output pressure are determined. Based on the oxygen concentration stabilization time, output flow rate stabilization time, and output pressure stabilization time, the dynamic response performance index of the vehicle-mounted oxygen generator is determined, and based on the oxygen concentration fluctuation, output flow rate fluctuation, and output pressure fluctuation, the stable output performance index of the vehicle-mounted oxygen generator is determined. Based on the dynamic response performance index and the stable output performance index, the dynamic response performance evaluation results and the stable output performance evaluation results of the vehicle-mounted oxygen generator are determined respectively. Based on the correspondence between the dynamic response performance evaluation results and the stable output performance evaluation results, the performance verification results of the vehicle-mounted oxygen generator are determined.

[0007] The technical solution provided in this invention has at least the following technical effects or advantages: addressing the performance verification needs during the adjustment of the output flow control target of a vehicle-mounted oxygen generator, by collecting oxygen concentration parameters, output flow parameters, and output pressure parameters after the output flow control target is adjusted, determining the parameter change stage and parameter stabilization stage based on the change state of the operating response parameters, and determining the dynamic response performance evaluation result and stable output performance evaluation result based on the stable response time and parameter fluctuation within the stabilization stage, thereby realizing automated testing and comprehensive verification of the output regulation performance of the vehicle-mounted oxygen generator. Specifically, by controlling the on-board oxygen generator to adjust from the initial flow control value to the target flow control value, and using the moment when the adjustment of the output flow control target value begins as the response start moment, the oxygen concentration parameter, output flow parameter, and output pressure parameter are continuously sampled during the adjustment response process to obtain response data that reflects the change in the equipment's operating status after the change in the output flow control target. By analyzing the change amplitude of the operating response parameters corresponding to each sampling moment, and combining the number of continuous samples, the change state of the operating response parameters is judged to determine the stage division time corresponding to each operating response parameter, thereby achieving automatic identification of the output parameter change stage and the output parameter stability stage. The oxygen concentration stabilization time is determined by the time interval between the response start moment and the corresponding stage division time of each operating response parameter. The stabilization time of output flow and output pressure provides a quantitative basis for evaluating dynamic response performance. By obtaining the maximum and minimum parameter values ​​of each operating response parameter during the stable output parameter phase, and determining the fluctuation of oxygen concentration, output flow, and output pressure based on the difference between the two, a quantitative description of the degree of parameter change under stable output conditions of the vehicle-mounted oxygen generator is achieved. Dynamic response performance indicators are determined based on the stabilization time of oxygen concentration, output flow, and output pressure, and stable output performance indicators are determined based on the fluctuation of oxygen concentration, output flow, and output pressure. The performance verification results are determined by combining the dynamic response performance evaluation results and the stable output performance evaluation results, thus achieving a comprehensive evaluation of the response capability and stability maintenance capability of the vehicle-mounted oxygen generator during the output adjustment process.

[0008] Compared with existing technologies, this invention changes the traditional method of evaluating the performance of vehicle-mounted oxygen concentrators based solely on a single output state or fixed test results. By analyzing the entire response state after adjusting the output flow control target, it achieves a quantitative evaluation of the dynamic adjustment process of the vehicle-mounted oxygen concentrator. Simultaneously, it transforms the time required for the operating response parameters to reach a stable state and the parameter fluctuations under stable conditions into performance evaluation criteria, enabling the performance verification results to simultaneously reflect the response speed and stability maintenance capability of the vehicle-mounted oxygen concentrator. This avoids the problem of incomplete performance evaluation results due to differences in the variation process of different operating response parameters. Furthermore, by combining the dynamic response performance evaluation results and the stable output performance evaluation results to determine the final performance verification result, the completeness and reliability of the vehicle-mounted oxygen concentrator output regulation performance verification are improved. Attached Figure Description

[0009] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0010] Figure 1 A flowchart illustrating an automated testing method for performance verification of a vehicle-mounted oxygen generator, provided in an embodiment of this application; Detailed Implementation This invention introduces a multi-parameter response state perception, automatic identification of operation phases, and a quantitative evaluation mechanism for performance indicators. It proposes an automated testing method for the performance verification of vehicle-mounted oxygen generators, which solves the problem that traditional vehicle-mounted oxygen generator output regulation performance verification lacks comprehensive analysis of changes in oxygen concentration, output flow rate, and output pressure, making it difficult to distinguish between parameter adjustment phases and stable output phases, resulting in inaccurate evaluation of dynamic response performance and stable output performance.

[0011] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.

[0012] It should be noted that the terms "first," "second," etc., used in the specification and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of this application described herein can be implemented in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion; for example, a process, method, system, platform, product, or server that includes a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or modules not explicitly listed or inherent to these processes, methods, products, or devices.

[0013] Example 1, as Figure 1 As shown, an automated testing method for performance verification of vehicle-mounted oxygen generators includes the following steps: S1. The output flow control target of the vehicle-mounted oxygen generator is adjusted from the initial flow control value to the target flow control value. The moment when the adjustment of the target flow control value begins is defined as the response start time corresponding to the output flow control target adjustment response process. Using the response start time as the sampling starting point, the operating response parameters corresponding to each sampling time in the response process after the flow control target adjustment are collected according to the preset sampling period. The operating response parameters include oxygen concentration parameters, output flow parameters, and output pressure parameters. Furthermore, the target for controlling the output flow of the on-board oxygen concentrator is adjusted from the initial flow control value to the target flow control value, including: Obtain the operating parameter configuration data of the vehicle-mounted oxygen generator, and extract the output flow adjustment range from the operating parameter configuration data. The minimum and maximum output flow rate setpoints within the output flow rate adjustment range are defined as the initial flow control value and the target flow control value, respectively. The initial flow control value is used as the target for the current output flow control of the vehicle-mounted oxygen concentrator, and the corresponding output flow parameters of the vehicle-mounted oxygen concentrator when running according to the initial flow control value are obtained. The output flow control target is adjusted based on the output flow parameters, and the flow control target value is used as the new output flow control target.

[0014] Specifically, the system acquires the operating parameter configuration data of the vehicle-mounted oxygen generator and extracts the output flow rate adjustment range from this data. min Q max ], where Q min Q represents the minimum allowable output flow rate value for the onboard oxygen concentrator under the current testing conditions. max This indicates the maximum output flow rate that can be set under the current test conditions for the vehicle-mounted oxygen generator.

[0015] Because the actual output flow rate, oxygen concentration, and output pressure of a vehicle-mounted oxygen generator need to undergo a dynamic adjustment process after the output flow rate control target changes, the minimum output flow rate setpoint Q within the output flow rate adjustment range is set accordingly. min Determined as the starting value Q for flow control s Set the maximum output flow rate setting value Q within the output flow rate adjustment range. max The target value for flow control is determined to be Q. t By determining the initial value Q for flow control. s and flow control target value Q t This enables the vehicle-mounted oxygen generator to perform an output flow control adjustment process from a low output flow state to a high output flow state.

[0016] Determine the initial value Q for flow control s and flow control target value Q t Then, set the initial value Q for flow control. s The target output flow rate of the vehicle-mounted oxygen concentrator is determined, so that the vehicle-mounted oxygen concentrator operates according to the initial flow control value Q. s The corresponding output flow control target is to operate; obtain the initial value Q of the on-board oxygen generator according to the flow control. s The corresponding output flow parameters at runtime are used to trigger the adjustment of the output flow control target, setting the flow control target value Q. t The new output flow control target is determined, causing the on-board oxygen generator to execute the flow control starting value Q. s To the target value Q of flow control t The process of adjusting the output flow control target.

[0017] In this embodiment, the operational response parameters of the vehicle-mounted oxygen generator, including oxygen concentration parameters, output flow rate parameters, and output pressure parameters, are collected by a data acquisition device. The data acquisition device is connected to the oxygen concentration detection unit, flow rate detection unit, and pressure detection unit, respectively, to receive the oxygen concentration detection data, output flow rate detection data, and output pressure detection data output by each detection unit during the operation of the vehicle-mounted oxygen generator. The data update cycles corresponding to the oxygen concentration detection unit, flow rate detection unit, and pressure detection unit are obtained, and the detection data is time-synchronized according to the data update time of each detection unit to ensure that different parameter data correspond to the same response state; the maximum value among the data update cycles corresponding to the oxygen concentration detection unit, flow rate detection unit, and pressure detection unit is determined as the data sampling cycle.

[0018] Since the output flow control target is the flow control starting value Q s Adjust to the target value Q for flow control tSubsequently, the actual output flow rate, oxygen concentration, and output pressure of the on-board oxygen generator need to gradually change through an internal adjustment process. Therefore, the target value Q for flow control is set... t The moment when the adjustment begins is determined as the response start time T0 corresponding to the output flow control target adjustment response process.

[0019] Taking the response start time T0 as the sampling starting point, the data acquisition device continuously acquires the operating parameters during the response process according to the sampling period. For sampling time T... i Obtain the corresponding oxygen concentration parameter C. i Output flow parameter F i and output pressure parameter P i Where i represents the sampling period number, C i F represents the oxygen concentration parameter corresponding to the i-th sampling time. i P represents the output flow rate parameter corresponding to the i-th sampling time. i This represents the output pressure parameter corresponding to the i-th sampling time.

[0020] The response data set X is composed of the oxygen concentration parameter, output flow rate parameter, and output pressure parameter at each sampling time during the response process, where X = {X1, X2, ..., X}. n}, where X i ={C i ,F i ,P i}, where n represents the total number of samplings completed during the response process.

[0021] By analyzing the oxygen concentration parameters, output flow rate parameters, and output pressure parameters at each sampling moment during the response process after the flow control target adjustment, response data is generated showing the output parameters of the vehicle-mounted oxygen generator changing with the flow control target.

[0022] S2. Based on the change amplitude of the operating response parameters at each sampling time, determine the stable state determination result of the change amplitude of the operating response parameters at each sampling time. Then, count the number of consecutive samples where the stable state determination result of the change amplitude of the operating response parameters is stable, according to the sampling time sequence. Compare the number of consecutive samples where the stable state determination result of the change amplitude of the operating response parameters is stable with the corresponding stable state determination sample count to determine the stage division time corresponding to the operating response parameters. Based on the stage division time corresponding to the operating response parameters, determine the output parameter change stage and the output parameter stable stage corresponding to the operating response parameters. Furthermore, based on the variation amplitude of the operating response parameters at each sampling time, the steady-state determination result of the variation amplitude of the operating response parameters at each sampling time is determined, including: For any given sampling time, obtain the operational response parameters corresponding to that sampling time and the previous sampling time, and calculate the change range of each operational response parameter corresponding to that sampling time, including the change range of oxygen concentration parameter, output flow rate parameter, and output pressure parameter. The changes in oxygen concentration, output flow rate, and output pressure at the sampling time are compared with their respective stability thresholds. If the change in oxygen concentration is less than or equal to the stability threshold, the stability determination result for the change in oxygen concentration at the sampling time is marked as stable. Similarly, if the change in output flow rate is less than or equal to the stability threshold, the stability determination result for the change in output pressure at the sampling time is marked as stable.

[0023] Furthermore, the number of consecutive samples where the steady-state determination result of the change amplitude of the running response parameters is a steady state is compared with the corresponding steady-state determination sample number to determine the stage division time corresponding to the running response parameters, including, When the number of consecutive samples in which the change of oxygen concentration parameter is in a stable state reaches the number of samples for determining the stable state of oxygen concentration parameter, the sampling time corresponding to the first stable state of oxygen concentration parameter change during the continuous sampling count process is determined as the stage division time corresponding to oxygen concentration parameter. When the number of consecutive samples in which the change amplitude of the output flow parameter is in a stable state reaches the number of samples corresponding to the stable state determination of the output flow parameter, the sampling time corresponding to the first stable state of the change amplitude of the output flow parameter in the continuous sampling count process is determined as the stage division time corresponding to the output flow parameter. When the number of consecutive samples in which the output pressure parameter change amplitude is in a stable state reaches the number of samples corresponding to the stable state determination of the output pressure parameter, the sampling time corresponding to the first stable state of the output pressure parameter change amplitude during the continuous sampling count process is determined as the stage division time corresponding to the output pressure parameter.

[0024] Furthermore, based on the phase division time corresponding to the operating response parameters, the output parameter change phase and output parameter stability phase corresponding to the operating response parameters are determined, including: The oxygen concentration parameter sampling interval from the response start time to the stage division time corresponding to the oxygen concentration parameter is defined as the oxygen concentration parameter change stage, and the oxygen concentration parameter sampling interval after the stage division time corresponding to the oxygen concentration parameter is defined as the oxygen concentration parameter stability stage. The sampling interval of the output flow parameter from the start of the response to the stage division time corresponding to the output flow parameter is defined as the output flow parameter change stage, and the sampling interval of the output flow parameter after the stage division time corresponding to the output flow parameter is defined as the output flow parameter stability stage. The sampling interval of the output pressure parameter from the start of the response to the stage division time corresponding to the output pressure parameter is defined as the output pressure parameter change stage, and the sampling interval of the output pressure parameter after the stage division time corresponding to the output pressure parameter is defined as the output pressure parameter stability stage.

[0025] Specifically, adjacent sampling times T are obtained according to the sampling time sequence. i With T i-1 The corresponding runtime response parameters, including the sampling time T i The corresponding oxygen concentration parameter C i Output flow parameter F i and output pressure parameter P i , and T i-1 The oxygen concentration parameter C at time 1 i-1 Output flow parameter F i-1 and output pressure parameter P i-1 , Calculate the sampling time T based on the operational response parameters corresponding to adjacent sampling times. i The corresponding changes in each operational response parameter, including the sampling time T i The corresponding change in oxygen concentration parameter ΔC i , Output flow rate parameter variation ΔF i and the variation range of the output pressure parameter ΔP i , where ΔC i =|C i -C i-1 |,ΔF i =|F i -F i-1 |,ΔP i =|P i -P i-1 |,ΔC i Indicates sampling time T i The corresponding oxygen concentration parameter relative to the previous sampling time T i-1 The corresponding change in oxygen concentration parameter, ΔF i Indicates sampling time T iThe corresponding output flow rate parameter relative to the previous sampling time T i-1 The corresponding change in the output flow rate parameter, ΔP i Indicates sampling time T i The corresponding output pressure parameter relative to the previous sampling time T i-1 The corresponding change range of the output pressure parameter, The test process acquires pre-configured stability change judgment thresholds, including the stability change judgment threshold δC for oxygen concentration parameter, the stability change judgment threshold δF for output flow parameter, and the stability change judgment threshold δP for output pressure parameter. Each stability change judgment threshold is determined based on the acquisition accuracy of the corresponding operating response parameter and is used to eliminate minor parameter fluctuations caused by detection errors. Sampling time T i The corresponding change in oxygen concentration parameter ΔC i , Output flow rate parameter variation ΔF i and the variation range of the output pressure parameter ΔP i The sampling time T is determined by comparing each sample with the corresponding stable change judgment threshold. i The corresponding steady-state determination results for the change amplitude of each operational response parameter. When the oxygen concentration parameter changes by ΔC i When the stable change judgment threshold δC corresponding to the oxygen concentration parameter is less than or equal to the sampling time T, the sampling time T will be used to determine the stable change threshold δC. i The steady-state determination result of the corresponding oxygen concentration parameter change amplitude is marked as a steady state; when the output flow parameter change amplitude ΔF i When the stable change judgment threshold δF corresponding to the output flow parameter is less than or equal to the sampling time T, i The steady-state determination result of the corresponding output flow parameter change amplitude is marked as a steady state; when the output pressure parameter change amplitude ΔP i When the stable change judgment threshold δP corresponding to the output pressure parameter is less than or equal to the sampling time T, the sampling time T will be used to determine the stable change threshold δP. i The steady-state determination result of the corresponding output pressure parameter change range is marked as a steady state.

[0026] According to the sampling time sequence, the number of consecutive samples at the sampling time when the change amplitude of each operating response parameter is in a stable state is counted to obtain the number of consecutive samples when the change amplitude of each operating response parameter is in a stable state. Obtain the pre-configured number of steady-state determination samples in the test process, including the number N of steady-state determination samples corresponding to the oxygen concentration parameter. C The number of samples N for determining the steady state corresponding to the output flow rate parameter. F And the number of samples N for determining the steady state corresponding to the output pressure parameters. PThe sampling quantity for each stable state determination is used to limit the number of consecutive samples required for the change amplitude of the corresponding operating response parameter to meet the stable change determination condition. The number of consecutive samples in which the change amplitude of each operational response parameter is in a stable state is compared with the number of samples for the corresponding stable state determination to determine the stage division time corresponding to each operational response parameter. When the number of consecutive samples in which the oxygen concentration parameter changes to a stable state reaches the number of samples N corresponding to the stable state of the oxygen concentration parameter, the sampling quantity is determined. C When the sampling time corresponding to the first stable change in oxygen concentration parameter during the continuous sampling quantity statistics process is defined as the stage division time T corresponding to the oxygen concentration parameter. C ; When the number of consecutive samples in which the output flow rate parameter changes to a stable state reaches the number of samples N corresponding to the stable state of the output flow rate parameter, the sampling quantity is determined. F When the sampling time corresponding to the first stable change in the output flow parameter during the continuous sampling quantity statistics process is defined as the stage division time T corresponding to the output flow parameter. F ; When the number of consecutive samples in which the output pressure parameter variation is in a stable state reaches the number of samples N corresponding to the stable state determination of the output pressure parameter. P When the sampling time corresponding to the first stable change in the output pressure parameter during the continuous sampling quantity statistics process is defined as the stage division time T corresponding to the output pressure parameter. P .

[0027] Time T is divided according to the stage corresponding to the oxygen concentration parameter. C The time T corresponding to the stage division of the output flow parameters F and the stage division time T corresponding to the output pressure parameters P The response process corresponding to each operational response parameter is divided into stages. Divide the response from the initial time T0 to the time T corresponding to the oxygen concentration parameter into stages. C The corresponding oxygen concentration parameter sampling interval is determined as the oxygen concentration parameter change stage, and the stage corresponding to the oxygen concentration parameter is divided into time T. C The sampling interval for the oxygen concentration parameter was then determined as the stable phase of the oxygen concentration parameter. The stage division time from the response start time T0 to the output flow parameter corresponding to the time T F The corresponding sampling interval of the output flow parameter is determined as the stage of output flow parameter change, and the stage corresponding to the output flow parameter is divided into time T. F The corresponding sampling interval for the output flow rate parameter is then determined as the stable phase of the output flow rate parameter. The stage division time from the response start time T0 to the output pressure parameter corresponding to the time T P The corresponding sampling interval of the output pressure parameter is determined as the stage of output pressure parameter change, and the stage corresponding to the output pressure parameter is divided into time T. P The sampling interval for the output pressure parameter is then determined as the stable phase of the output pressure parameter.

[0028] S3. Based on the time interval between the response start time and the corresponding stage division time for each operating response parameter, determine the oxygen concentration stabilization time, output flow rate stabilization time, and output pressure stabilization time respectively. Specifically, the response start time T0 and the corresponding stage division time T for the oxygen concentration parameter are obtained. C The time T corresponding to the stage division of the output flow parameters F、 The stage division time T corresponding to the output pressure parameter P Calculate the time interval between the response start time and the stage division time corresponding to each running response parameter. The time T is divided according to the stage corresponding to the oxygen concentration parameter at the start time T0 of the response. C Calculate the oxygen concentration stabilization time t between the time intervals. C0 , where t C0 =T C -T0, oxygen concentration stabilization time t C0 This indicates the time elapsed from the initial response state change to the stable output parameter stage corresponding to the oxygen concentration parameter after the on-board oxygen generator performs output flow control target adjustment. The time T is divided into stages based on the response start time T0 and the output flow parameters. F Calculate the output flow stabilization time t between the time intervals. F0 , where t F0 =T F -T0, Output flow stabilization time t F0 This indicates the time elapsed from the initial response state change to the stable output parameter stage after the onboard oxygen generator adjusts its output flow control target. The time T is divided into stages based on the response start time T0 and the output pressure parameters. P Calculate the output pressure settling time t between the time intervals. P0 , where t P0 =T P -T0, Output pressure stabilization time t P0 This indicates the time elapsed from the initial response state change to the stable output parameter stage corresponding to the output pressure parameter after the on-board oxygen generator performs output flow control target adjustment.

[0029] S4. Based on the operating response parameters corresponding to each sampling time during the stable phase of the output parameters, calculate the maximum and minimum parameter values ​​of each operating response parameter during the stable phase of the output parameters. Then, based on the difference between the maximum and minimum parameter values, determine the oxygen concentration fluctuation, output flow rate fluctuation, and output pressure fluctuation. Specifically, the running response parameters corresponding to each sampling time point within the stable phase of each output parameter are extracted. The parameter values ​​are compared according to the sampling time order to determine the maximum and minimum parameter values ​​for each running response parameter. Based on the oxygen concentration parameters corresponding to each sampling time within the stable phase of the output parameters, the parameter values ​​are compared in chronological order to determine the maximum parameter value C corresponding to the oxygen concentration parameter. max and the minimum parameter value C min ; Based on the output flow parameters at each sampling time point within the stable phase of the output flow parameter, the parameter values ​​are compared in chronological order to determine the maximum parameter value F corresponding to the output flow parameter. max and the minimum parameter value F min ; Based on the output pressure parameters at each sampling time point during the stable phase of the output pressure parameter, the parameter values ​​are compared in chronological order to determine the maximum parameter value P corresponding to the output pressure parameter. max and the minimum parameter value P min , The fluctuation of each operational response parameter is determined based on the difference between the maximum and minimum parameter values. Based on the maximum parameter value C corresponding to the oxygen concentration parameter max and the minimum parameter value C min The difference between them determines the oxygen concentration fluctuation R. C , where R C =C max -C min Oxygen concentration fluctuation R C This indicates the maximum change in oxygen concentration parameters during the stable phase of the output parameters after the on-board oxygen generator has completed the adjustment of the output flow control target. Based on the maximum parameter value F corresponding to the output flow rate parameter max and the minimum parameter value F min The difference between them determines the output flow fluctuation R. F , where R F =F max -F min Output flow fluctuation R FThis indicates the maximum degree of change in the output flow parameter during the stable phase of the output parameter after the on-board oxygen generator has completed the adjustment of the output flow control target. Based on the maximum parameter value P corresponding to the output pressure parameter max and the minimum parameter value P min The difference between them determines the output pressure fluctuation R. P , where R P =P max -P min Output pressure fluctuation R P This indicates the maximum degree of change in the output pressure parameter during the stable phase of the output parameters after the on-board oxygen generator has completed the adjustment of the output flow control target.

[0030] S5. Based on the oxygen concentration stabilization time, output flow rate stabilization time, and output pressure stabilization time, determine the dynamic response performance indicators corresponding to the on-board oxygen generator, and based on the oxygen concentration fluctuation, output flow rate fluctuation, and output pressure fluctuation, determine the stable output performance indicators corresponding to the on-board oxygen generator. Furthermore, based on the oxygen concentration stabilization time, output flow rate stabilization time, and output pressure stabilization time, the dynamic response performance indicators corresponding to the vehicle-mounted oxygen generator are determined, including: Obtain the oxygen concentration stabilization time, output flow rate stabilization time, and output pressure stabilization time. Based on the average of these three times, determine the comprehensive stable response time corresponding to the output flow rate control target adjustment response process. Obtain the pre-configured response time baseline value in the test process, and determine the dynamic response performance index corresponding to the vehicle-mounted oxygen generator based on the ratio of the time difference between the response time baseline value and the comprehensive stable response time to the response time baseline value.

[0031] Furthermore, based on the fluctuations in oxygen concentration, output flow rate, and output pressure, the stable output performance indicators of the on-board oxygen generator are determined, including: Obtain the fluctuations in oxygen concentration, output flow rate, and output pressure. Based on the average values ​​of these fluctuations, determine the overall stable fluctuation corresponding to the output flow control target adjustment response process. Obtain the pre-configured stable output fluctuation benchmark value in the test process, and determine the stable output performance index corresponding to the vehicle-mounted oxygen generator based on the ratio of the fluctuation difference between the stable output fluctuation benchmark value and the comprehensive stable fluctuation value to the stable output fluctuation benchmark value.

[0032] Specifically, the time t for obtaining oxygen concentration stabilization C0 Output flow stabilization time t F0and the output pressure stabilization time t P0 And obtain the pre-configured response time baseline value t in the test process. R Among them, the response time reference value t R Determined based on the design output regulation requirements of the vehicle-mounted oxygen generator, this serves as a benchmark for determining the time required for each operating response parameter to reach the stable output parameter stage after the oxygen generator has adjusted its output flow control target. Based on the oxygen concentration stabilization time t C0 Output flow stabilization time t F0 and the output pressure stabilization time t P0 Calculate the overall stable response time t corresponding to the output flow control target adjustment response process. ave , where t ave =(t C0 +t F0 +t P0 ) / 3, overall stable response time t ave This indicates the average time taken for the oxygen concentration, output flow, and output pressure parameters to change from their initial state to a stable state after the on-board oxygen generator performs output flow control target adjustment. Based on the response time baseline value t R With the overall stable response time t ave Calculate the dynamic response performance index D of the on-board oxygen generator based on the time difference between the two, where D = (t... R -t ave ) / t R The dynamic response performance index D is used to characterize the response efficiency of the actual response process of the on-board oxygen generator relative to the design output adjustment requirements after the output flow control target is adjusted.

[0033] Obtain the oxygen concentration fluctuation R C Output flow fluctuation R F and output pressure fluctuation R P And obtain the pre-configured stable output fluctuation benchmark value R in the test process. S Among them, the stable output fluctuation reference value R S Based on the design output regulation requirements of the vehicle-mounted oxygen concentrator, this parameter is used as a benchmark for evaluating the fluctuation levels of various operating response parameters during the stable phase of the output parameters after the vehicle-mounted oxygen concentrator has adjusted its output flow control target. Based on oxygen concentration fluctuation R C Output flow fluctuation R F and output pressure fluctuation R P Calculate the comprehensive steady-state fluctuation R corresponding to the adjustment response process of the output flow control target. ave , where R ave =(RC +R F +R P ) / 3, Overall stable fluctuation R ave This indicates the average change in oxygen concentration, output flow rate, and output pressure parameters during the stable phase of the output parameters after the on-board oxygen generator has adjusted its output flow rate control target. Based on the stable output fluctuation benchmark value R S With the overall stable fluctuation R ave The difference between them is used to calculate the stable output performance index S of the vehicle-mounted oxygen concentrator, where S = (R S -R ave ) / R S The stable output performance index S is used to characterize the ability of the on-board oxygen generator to maintain a stable output state relative to the design output adjustment requirements after the output flow control target is adjusted.

[0034] S6. Based on the dynamic response performance index and the stable output performance index, determine the corresponding dynamic response performance evaluation results and stable output performance evaluation results for the vehicle-mounted oxygen concentrator, and determine the performance verification results of the vehicle-mounted oxygen concentrator based on the correspondence between the dynamic response performance evaluation results and the stable output performance evaluation results. Furthermore, based on the dynamic response performance index and the stable output performance index, the dynamic response performance evaluation results and the stable output performance evaluation results for the vehicle-mounted oxygen generator are determined, including: Based on the numerical values ​​corresponding to the dynamic response performance indicators, the dynamic response performance evaluation result for the vehicle-mounted oxygen generator is determined. When the dynamic response performance indicator is greater than or equal to zero, the evaluation result is marked as meeting the design output adjustment requirements; when the indicator is less than zero, the result is marked as failing to meet the design output adjustment requirements. Based on the index values ​​corresponding to the stable output performance indicators, the stable output performance evaluation result of the vehicle-mounted oxygen generator is determined. When the stable output performance index is greater than or equal to zero, the stable output performance evaluation result is marked as the stable output performance meets the design output adjustment requirements. When the stable output performance index is less than zero, the stable output performance evaluation result is marked as the stable output performance does not meet the design output adjustment requirements.

[0035] Furthermore, based on the correspondence between the dynamic response performance evaluation results and the stable output performance evaluation results, the performance verification results of the on-board oxygen generator are determined, including: When both the dynamic response performance evaluation results and the stable output performance evaluation results meet the design output adjustment requirements, the performance verification result of the vehicle-mounted oxygen generator is judged as having passed the performance verification. When either the dynamic response performance evaluation result or the stable output performance evaluation result fails to meet the design output adjustment requirements, the performance verification result of the vehicle-mounted oxygen generator is judged as having failed the performance verification.

[0036] Specifically, this involves obtaining the dynamic response performance metric D and the stable output performance metric S. The dynamic response performance index D is compared with 0. Based on the comparison result, the dynamic response performance evaluation result for the on-board oxygen generator is determined. Specifically, when the dynamic response performance index D ≥ 0, the dynamic response performance evaluation result is marked as meeting the design output adjustment requirements; when the dynamic response performance index D < 0, the dynamic response performance evaluation result is marked as not meeting the design output adjustment requirements. The stable output performance index S is compared with 0. Based on the comparison result, the stable output performance evaluation result of the vehicle oxygen generator is determined. When the stable output performance index S≥0, the stable output performance evaluation result is marked as the stable output performance meets the design output adjustment requirements. When the stable output performance index S<0, the stable output performance evaluation result is marked as the stable output performance does not meet the design output adjustment requirements.

[0037] Based on the correspondence between the dynamic response performance evaluation results and the stable output performance evaluation results, the performance verification results of the vehicle-mounted oxygen concentrator are determined. When both the dynamic response performance evaluation results and the stable output performance evaluation results meet the design output adjustment requirements, the performance verification result of the vehicle-mounted oxygen concentrator is determined to be passed. When either the dynamic response performance evaluation result or the stable output performance evaluation result does not meet the design output adjustment requirements, the performance verification result of the vehicle-mounted oxygen concentrator is determined to be failed.

[0038] Once the performance verification results of the vehicle-mounted oxygen generator are confirmed, the sampling of the operating response parameters corresponding to the output flow control target adjustment response process is stopped.

[0039] The specific embodiments described above do not constitute a limitation on the scope of protection of this application. Those skilled in the art should understand that various modifications, combinations, and substitutions can be made according to design requirements and other factors. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this application should be included within the scope of protection of this application.

Claims

1. An automated testing method for performance verification of vehicle-mounted oxygen generators, characterized in that, Includes the following steps, The output flow control target of the vehicle-mounted oxygen generator is adjusted from the initial flow control value to the target flow control value. The moment when the adjustment of the target flow control value begins is determined as the response start time corresponding to the output flow control target adjustment response process. The response start time is used as the sampling start point, and the operating response parameters corresponding to each sampling time in the response process after the flow control target adjustment are collected according to the preset sampling period. The operating response parameters include oxygen concentration parameters, output flow parameters, and output pressure parameters. Based on the change amplitude of the operating response parameters at each sampling time, the stable state determination result of the change amplitude of the operating response parameters at each sampling time is determined. The number of consecutive samples in which the stable state determination result of the change amplitude of the operating response parameters is stable is counted in the order of sampling time. The number of consecutive samples in which the stable state determination result of the change amplitude of the operating response parameters is stable is compared with the corresponding stable state determination sampling number to determine the stage division time corresponding to the operating response parameters. Based on the stage division time corresponding to the operating response parameters, the output parameter change stage and output parameter stability stage corresponding to the operating response parameters are determined. Based on the time interval between the response start time and the stage division time corresponding to each operating response parameter, the oxygen concentration stabilization time, output flow stabilization time, and output pressure stabilization time are determined respectively. Based on the operating response parameters corresponding to each sampling time during the stable phase of the output parameters, the maximum and minimum parameter values ​​of each operating response parameter during the stable phase of the output parameters are calculated respectively. Based on the difference between the maximum and minimum parameter values, the fluctuation of oxygen concentration, the fluctuation of output flow rate, and the fluctuation of output pressure are determined. Based on the oxygen concentration stabilization time, output flow rate stabilization time, and output pressure stabilization time, the dynamic response performance index of the vehicle-mounted oxygen generator is determined, and based on the oxygen concentration fluctuation, output flow rate fluctuation, and output pressure fluctuation, the stable output performance index of the vehicle-mounted oxygen generator is determined. Based on the dynamic response performance index and the stable output performance index, the dynamic response performance evaluation results and the stable output performance evaluation results of the vehicle-mounted oxygen generator are determined respectively. Based on the correspondence between the dynamic response performance evaluation results and the stable output performance evaluation results, the performance verification results of the vehicle-mounted oxygen generator are determined.

2. The automated testing method for performance verification of vehicle-mounted oxygen generators according to claim 1, characterized in that, The target for controlling the output flow of the on-board oxygen generator is adjusted from the initial flow control value to the target flow control value. include, Obtain the operating parameter configuration data of the vehicle-mounted oxygen generator, and extract the output flow adjustment range from the operating parameter configuration data. The minimum and maximum output flow rate setpoints within the output flow rate adjustment range are defined as the initial flow control value and the target flow control value, respectively. The initial flow control value is used as the target for the current output flow control of the vehicle-mounted oxygen concentrator, and the corresponding output flow parameters of the vehicle-mounted oxygen concentrator when running according to the initial flow control value are obtained. The output flow control target is adjusted based on the output flow parameters, and the flow control target value is used as the new output flow control target.

3. The automated testing method for performance verification of vehicle-mounted oxygen generators according to claim 2, characterized in that, The step of determining the stable state judgment result of the change amplitude of the operating response parameters at each sampling time based on the change amplitude of the operating response parameters at each sampling time includes, For any given sampling time, obtain the operational response parameters corresponding to that sampling time and the previous sampling time, and calculate the change range of each operational response parameter corresponding to that sampling time, including the change range of oxygen concentration parameter, output flow rate parameter, and output pressure parameter. The changes in oxygen concentration, output flow rate, and output pressure at the sampling time are compared with their respective stability thresholds. If the change in oxygen concentration is less than or equal to the stability threshold, the stability determination result for the change in oxygen concentration at the sampling time is marked as stable. Similarly, if the change in output flow rate is less than or equal to the stability threshold, the stability determination result for the change in output pressure at the sampling time is marked as stable.

4. The automated testing method for performance verification of vehicle-mounted oxygen generators according to claim 3, characterized in that, The step of comparing the number of consecutive samples in which the steady-state determination result of the change amplitude of the running response parameters is determined to be in a stable state with the corresponding number of samples in the steady-state determination to determine the stage division time corresponding to the running response parameters includes, When the number of consecutive samples in which the change of oxygen concentration parameter is in a stable state reaches the number of samples for determining the stable state of oxygen concentration parameter, the sampling time corresponding to the first stable state of oxygen concentration parameter change during the continuous sampling count process is determined as the stage division time corresponding to oxygen concentration parameter. When the number of consecutive samples in which the change amplitude of the output flow parameter is in a stable state reaches the number of samples corresponding to the stable state determination of the output flow parameter, the sampling time corresponding to the first stable state of the change amplitude of the output flow parameter in the continuous sampling count process is determined as the stage division time corresponding to the output flow parameter. When the number of consecutive samples in which the output pressure parameter change amplitude is in a stable state reaches the number of samples corresponding to the stable state determination of the output pressure parameter, the sampling time corresponding to the first stable state of the output pressure parameter change amplitude during the continuous sampling count process is determined as the stage division time corresponding to the output pressure parameter.

5. The automated testing method for performance verification of vehicle-mounted oxygen generators according to claim 4, characterized in that, The process involves dividing the time into stages corresponding to the operational response parameters to determine the output parameter change stage and the output parameter stability stage. include, The oxygen concentration parameter sampling interval from the response start time to the stage division time corresponding to the oxygen concentration parameter is defined as the oxygen concentration parameter change stage, and the oxygen concentration parameter sampling interval after the stage division time corresponding to the oxygen concentration parameter is defined as the oxygen concentration parameter stability stage. The sampling interval of the output flow parameter from the start of the response to the stage division time corresponding to the output flow parameter is defined as the output flow parameter change stage, and the sampling interval of the output flow parameter after the stage division time corresponding to the output flow parameter is defined as the output flow parameter stability stage. The sampling interval of the output pressure parameter from the start of the response to the stage division time corresponding to the output pressure parameter is defined as the output pressure parameter change stage, and the sampling interval of the output pressure parameter after the stage division time corresponding to the output pressure parameter is defined as the output pressure parameter stability stage.

6. The automated testing method for performance verification of vehicle-mounted oxygen generators according to claim 5, characterized in that, The determination of the dynamic response performance indicators of the on-board oxygen generator based on the oxygen concentration stabilization time, output flow rate stabilization time, and output pressure stabilization time includes, Obtain the oxygen concentration stabilization time, output flow rate stabilization time, and output pressure stabilization time. Based on the average of these three times, determine the comprehensive stable response time corresponding to the output flow rate control target adjustment response process. Obtain the pre-configured response time baseline value in the test process, and determine the dynamic response performance index corresponding to the vehicle-mounted oxygen generator based on the ratio of the time difference between the response time baseline value and the comprehensive stable response time to the response time baseline value.

7. The automated testing method for performance verification of vehicle-mounted oxygen generators according to claim 6, characterized in that, The process of determining the stable output performance indicators of the on-board oxygen generator based on the oxygen concentration fluctuation, output flow rate fluctuation, and output pressure fluctuation includes: Obtain the fluctuations in oxygen concentration, output flow rate, and output pressure. Based on the average values ​​of these fluctuations, determine the overall stable fluctuation corresponding to the output flow control target adjustment response process. Obtain the pre-configured stable output fluctuation benchmark value in the test process, and determine the stable output performance index corresponding to the vehicle-mounted oxygen generator based on the ratio of the fluctuation difference between the stable output fluctuation benchmark value and the comprehensive stable fluctuation value to the stable output fluctuation benchmark value.

8. The automated testing method for performance verification of vehicle-mounted oxygen generators according to claim 7, characterized in that, The process of determining the dynamic response performance evaluation results and stable output performance evaluation results of the vehicle-mounted oxygen generator based on the dynamic response performance index and stable output performance index, respectively, includes: Based on the numerical values ​​corresponding to the dynamic response performance indicators, the dynamic response performance evaluation result for the vehicle-mounted oxygen generator is determined. When the dynamic response performance indicator is greater than or equal to zero, the evaluation result is marked as meeting the design output adjustment requirements; when the indicator is less than zero, the result is marked as failing to meet the design output adjustment requirements. Based on the index values ​​corresponding to the stable output performance indicators, the stable output performance evaluation result of the vehicle-mounted oxygen generator is determined. When the stable output performance index is greater than or equal to zero, the stable output performance evaluation result is marked as the stable output performance meets the design output adjustment requirements. When the stable output performance index is less than zero, the stable output performance evaluation result is marked as the stable output performance does not meet the design output adjustment requirements.

9. The automated testing method for performance verification of vehicle-mounted oxygen generators according to claim 8, characterized in that, The determination of the vehicle-mounted oxygen generator performance verification results based on the correspondence between the dynamic response performance evaluation results and the stable output performance evaluation results includes, When both the dynamic response performance evaluation results and the stable output performance evaluation results meet the design output adjustment requirements, the performance verification result of the vehicle-mounted oxygen generator is judged as having passed the performance verification. When either the dynamic response performance evaluation result or the stable output performance evaluation result fails to meet the design output adjustment requirements, the performance verification result of the vehicle-mounted oxygen generator is judged as having failed the performance verification.

Images