Internal medium characteristic analysis method and system based on hybrid gas generator

Abstract

The invention relates to an internal medium characteristic analysis method and system based on a hybrid gas generator, and relates to the technical field of performance test.The method comprises the steps that the internal detection temperature and the internal detection pressure are obtained; analyzing according to the internal detection temperature to determine an internal temperature state, and defining a steady state arrival time point when the internal temperature state is consistent with a preset temperature steady state; after the steady state reaches the time point, analyzing according to the internal detection temperature to construct an internal environment condition, and performing internal ignition of the generator when the internal environment condition is consistent with a preset effective triggering condition; according to the starting time point, a monitoring analysis interval with the width being a preset monitoring analysis duration is constructed, and a time-temperature-pressure change diagram is constructed in the monitoring analysis interval according to the time point, the internal detection temperature and the internal detection pressure; the method has the effect of reducing the influence caused by the deviation of the performance test data in the design of the vehicle passive safety system.

Description

Technical Field

[0001] The present application relates to the field of performance testing technology, and in particular to a method and system for analyzing the characteristics of an internal medium of a hybrid gas generator. Background Art

[0002] As a core component of a vehicle's passive safety systems (such as airbags), the performance and reliability of a hybrid gas generator are directly related to the safety of the occupants. This device rapidly generates large amounts of gas through combustion or chemical reactions, inflating the airbag at the moment of collision and mitigating the impact on the occupants. However, the internal workings of the gas generator involve high temperatures, high pressures, and transient chemical reactions, and its performance is significantly affected by ambient temperature. For example, under extremely low or high temperature conditions, the combustion rate, gas generation, and pressure characteristics may fluctuate, thereby affecting the airbag's deployment timing and protective effectiveness.

[0003] Currently, methods for characterizing the temperature or pressure characteristics of the medium within a hybrid gas generator primarily include: 1) estimating the temperature of the medium within the generator by measuring the metal surface temperature of the generator; and 2) estimating the temperature-time and pressure-time characteristics of the medium within a real gas generator (filled with high-pressure gas) by measuring the temperature-time characteristics of the medium within a specially designed empty inert gas generator sample (without high-pressure gas). However, these methods have significant limitations: surface temperature measurement can only reflect the temperature distribution outside the shell and cannot accurately capture the transient thermodynamic state of the internal gas medium (such as the temperature field, pressure field, and flow characteristics). Furthermore, empty shell simulation tests, ignoring actual charge conditions, make it difficult to replicate the multi-physics coupling effects of a real operating environment. These deviations lead to discrepancies between the test data and the actual characteristics of the medium within a real gas generator, which in turn affects design optimization and reliability assessment.

[0004] Therefore, there is an urgent need for a method that can accurately analyze the transient thermodynamic properties inside the hybrid gas generator to solve the problems of incomplete data acquisition and inaccurate environmental adaptability evaluation in existing testing technologies, thereby improving the design level and working condition adaptability of the vehicle passive safety system. Summary of the Invention

[0005] In order to reduce the impact of deviations in performance test data in the design of vehicle passive safety systems, the present application provides a method and system for analyzing internal medium characteristics of a hybrid gas generator.

[0006] In a first aspect, the present application provides a method for analyzing the internal medium characteristics of a hybrid gas generator, which adopts the following technical solution:

[0007] A method for analyzing internal medium characteristics of a hybrid gas generator, comprising:

[0008] The control test system is built into a preset controlled thermal environment unit, and controls the controlled thermal environment unit to apply the thermal environment according to a preset thermal operation rule, and defines the time point when the thermal environment application starts as the starting time point;

[0009] Real-time acquisition of internal detection temperature and internal detection pressure, wherein the internal detection temperature is acquired by a temperature sensor sealed at a preset detection position inside the generator, and the internal detection pressure is acquired by a pressure sensing channel connected to an existing interface of the generator;

[0010] Analyze the internal temperature according to the internal temperature detection to determine the internal temperature state, and define a steady state arrival time point when the internal temperature state is consistent with a preset temperature steady state;

[0011] After reaching the steady state time point, the internal detection temperature is analyzed to establish the internal environmental conditions, and the internal ignition of the generator is performed when the internal environmental conditions are consistent with the preset effective trigger conditions;

[0012] A monitoring and analysis interval with a preset monitoring and analysis duration is constructed based on the starting time point, and a time-temperature-pressure change graph is constructed in the monitoring and analysis interval based on the time point, internal detection temperature, and internal detection pressure.

[0013] Optionally, the step of analyzing the internal temperature to determine the internal temperature state includes:

[0014] On a preset time axis, a detection interval with a width of a preset detection time length is constructed with the real-time acquisition time point of the internal detection temperature as the rear end point;

[0015] Calculating the average value of all internal detected temperatures in the detection interval to determine the detection average temperature;

[0016] Calculate the overall deviation parameter based on the detected mean temperature and each internal detection temperature;

[0017] Determine whether the overall deviation parameter is less than the preset stable deviation parameter;

[0018] If the overall deviation parameter is not less than the stable deviation parameter, the preset temperature change state is determined as the current internal temperature state;

[0019] If the overall deviation parameter is less than the steady deviation parameter, the temperature steady state is determined as the current internal temperature state, and the front end point of the current detection interval is determined as the steady state arrival time point.

[0020] Optionally, after the steady-state arrival time point is determined, the internal medium characteristic analysis method based on the hybrid gas generator further includes:

[0021] Get the test product type;

[0022] Determine the external temperature in-place time corresponding to the product type being tested based on the preset external temperature matching relationship;

[0023] The test product types other than the current test product type recorded in the external matching relationship are defined as the comparison product types, and the external temperature in place time corresponding to the comparison product types is defined as the comparison in place time;

[0024] The comparison product types whose comparison completion time is adjacent to the external temperature completion time are defined as adjacent product types, and the internal temperature compliance time is determined based on the adjacent product types, and the required compliance range is constructed based on the internal temperature compliance time;

[0025] Determine the duration of the thermal environment application based on the starting time point and the steady-state arrival time point, and judge whether the thermal environment application duration is within the required standard range;

[0026] If the duration of thermal environment application is within the required standard range, a qualified change signal is output;

[0027] If the thermal environment application time is not within the required standard range, an abnormal change signal will be output.

[0028] Optionally, after the steady-state arrival time point is determined, the internal medium characteristic analysis method based on the hybrid gas generator further includes:

[0029] Calculate the deviation temperature ratio based on the mean detection temperature of the current detection interval and the preset steady-state demand temperature;

[0030] Determine whether the deviation temperature ratio is greater than the preset deviation requirement ratio;

[0031] If the deviation temperature ratio is greater than the deviation demand ratio, a temperature abnormality signal is output;

[0032] If the deviation temperature ratio is not greater than the deviation requirement ratio, the internal environmental conditions are established after the change qualified signal is output.

[0033] Optionally, after the temperature anomaly signal is output, the internal medium characteristic analysis method based on the hybrid gas generator further includes:

[0034] Get the historical usage time of the current temperature sensor;

[0035] Determine whether the historical usage time is greater than the preset security protection time;

[0036] If the historical usage time is longer than the safety protection time, a damaged reference signal is output;

[0037] If the historical usage time is not greater than the safety protection time, a sealing reference signal is output.

[0038] Optionally, after the time-temperature-pressure variation diagram is constructed, the internal medium characteristic analysis method based on the hybrid gas generator further includes:

[0039] The time point when ignition occurs inside the generator is defined as the physical trigger point;

[0040] After the physical trigger point, a unit interval with the current time point as the rear end point and a width of a preset unit time length is constructed, and a unit temperature change is determined based on the internal detection temperature at the front and rear end points of the unit interval, and a unit pressure change is determined based on the internal detection pressure;

[0041] The front end point of the unit interval corresponding to the unit change temperature being greater than the preset allowable change temperature is defined as the temperature response point, and the front end point of the unit interval corresponding to the unit change pressure being greater than the preset allowable change pressure is defined as the pressure response point;

[0042] Analyzing the physical trigger point and the temperature response point to determine the temperature response delay, and analyzing the physical trigger point and the pressure response point to determine the pressure response delay;

[0043] The time-temperature-pressure change diagram is corrected and updated according to the temperature response delay and the pressure response delay.

[0044] Optionally, after the time-temperature-pressure variation diagram is corrected and updated, the internal medium characteristic analysis method based on the hybrid gas generator further includes:

[0045] Construct the pre-activation phase interval based on the starting time point and the steady-state arrival time point;

[0046] The intervals in the detection interval except the pre-activation stage interval are defined as the activation operation stage interval;

[0047] The maximum internal detection temperature in the activation operation phase is defined as the upper limit reaction temperature, and the time point corresponding to the upper limit reaction temperature is defined as the highest peak point.

[0048] In a second aspect, the present application provides an internal medium characteristic analysis system based on a hybrid gas generator, which adopts the following technical solution:

[0049] A system for analyzing internal medium characteristics of a hybrid gas generator, comprising:

[0050] An acquisition module, connected to the processing module and the judgment module, is used to acquire information;

[0051] A processing module, connected to the acquisition module and the judgment module, for storing and processing information;

[0052] The judgment module is connected with the acquisition module and the processing module and is used for judging the information;

[0053] The processing module controls the test system to be built into a preset controlled thermal environment unit, and controls the controlled thermal environment unit to apply a thermal environment according to a preset thermal operation rule, and defines the time point when the thermal environment application starts as a starting time point;

[0054] The acquisition module acquires the internal detection temperature and internal detection pressure in real time, wherein the internal detection temperature is acquired by a temperature sensor sealed at a preset detection position inside the generator, and the internal detection pressure is acquired by a pressure sensing channel connected to an existing interface of the generator;

[0055] The processing module analyzes the internal temperature detection to determine the internal temperature state, and defines a steady state arrival time point when the judgment module determines that the internal temperature state is consistent with a preset temperature steady state;

[0056] The processing module analyzes the internal detected temperature to construct the internal environmental conditions after the steady state is reached, and ignites the generator internally when the judgment module determines that the internal environmental conditions are consistent with the preset effective trigger conditions;

[0057] The processing module constructs a monitoring and analysis interval with a preset monitoring and analysis duration according to the starting time point, and constructs a time-temperature-pressure variation diagram according to the time point, the internal detection temperature and the internal detection pressure in the monitoring and analysis interval.

[0058] In summary, this application includes at least one of the following beneficial technical effects:

[0059] 1. By installing a temperature sensor inside the gas generator, transient data of the generator's internal reaction can be directly and effectively acquired, thereby reducing the impact of deviations in performance test data on the design of vehicle passive safety systems;

[0060] 2. In the process of using sensors to monitor the internal data of the generator, data analysis is used to determine whether there is any device damage or poor sealing, thereby ensuring the stability of the test. BRIEF DESCRIPTION OF THE DRAWINGS

[0061] Figure 1 It is a flow chart of the internal medium characteristics analysis method based on the hybrid gas generator.

[0062] Figure 2 It is a schematic diagram of the time-temperature-pressure variation diagram.

[0063] Figure 3 is a flow chart of a method for determining an internal temperature state.

[0064] Figure 4 It is a flow chart of the generator sealing condition analysis method.

[0065] Figure 5 It is a flow chart of the method for analyzing steady-state temperature anomaly.

[0066] Figure 6 It is a flow chart of the method for analyzing the possibility of temperature sensor damage.

[0067] Figure 7 It is a flow chart of the time-temperature-pressure variation diagram correction method.

[0068] Figure 8 This is a flow chart of the method for marking time-temperature-pressure change diagrams.

[0069] Figure 9 It is a module flow chart based on the internal medium characteristics analysis method of the hybrid gas generator. DETAILED DESCRIPTION

[0070] In order to make the purpose, technical solutions and advantages of this application more clear, the following Figures 1-9 It should be understood that the specific embodiments described herein are only used to explain the present application and are not intended to limit the present application.

[0071] The embodiments of the present application are described in further detail below with reference to the accompanying drawings.

[0072] The present application embodiment discloses a method for analyzing the internal medium characteristics of a hybrid gas generator, referring to Figure 1 The method flow of the internal medium characteristic analysis method of the hybrid gas generator includes the following steps:

[0073] Step S100: Control the test system to be built into a preset controlled thermal environment unit, and control the controlled thermal environment unit to apply a thermal environment according to a preset thermal operation rule, and define the time point when the thermal environment application starts as a starting time point.

[0074] The test system is a system that includes a hybrid gas generator and is integrated with various data sensors for testing the performance of the generator. The system includes a hybrid gas generator, and a temperature sensor is installed at a detection position set inside the generator. The temperature sensor can be a thermocouple, thermistor, etc. The sensing end of the temperature sensor fits tightly to the internal surface of the generator. In order to ensure that the temperature sensor is sealed inside the generator, it is necessary to ensure that the internal sealing of the generator under a high-pressure working environment is not destroyed when the signal line of the temperature sensor is led out. Therefore, a specific element for sealing, such as an adapter, can be installed at the interface where the signal line of the sensor passes through the wall of the component; there is an existing interface on the generator for gas replenishment. At this time, the existing interface is used to connect the pressure sensing channel to realize internal gas Direct acquisition of pressure data; the controlled thermal environment unit is a device set up by the staff to heat the test system, such as a temperature control box or a high and low temperature test box. It has its own control panel or interface, so that it can apply controllable steady-state thermal conditions or dynamic thermal processes to the test system. In order to realize the intelligent processing of the overall test, the step of moving the test system to the controlled thermal environment unit after the setting is completed can be performed by a manipulator combined with intelligent recognition; the thermal operation rule is the heating rule that meets the purpose of the test currently required by the staff. For example, if the current test is for the performance of the generator at 107°C, the corresponding thermal operation rule is that the controlled thermal environment unit performs a constant temperature operation at 107°C; define the starting time point to mark the time point when the test starts, which is convenient for subsequent data analysis.

[0075] Step S101: Acquire the internal detection temperature and internal detection pressure in real time, wherein the internal detection temperature is acquired by a temperature sensor sealed at a preset detection position inside the generator, and the internal detection pressure is acquired by a pressure sensing channel connected to the existing interface of the generator.

[0076] The internal detection temperature is the temperature value inside the generator, and the internal detection pressure is the air pressure value inside the generator detected under the temperature reaction. The internal detection temperature and the internal detection pressure are synchronously collected under the same time base, and after the collection is completed, the internal detection temperature and the internal detection pressure at each collection moment are respectively associated with the corresponding timestamp to form a time series data set, which is convenient for subsequent temperature and pressure data analysis.

[0077] Step S102 : Analyze the internal temperature detection temperature to determine the internal temperature state, and define a steady-state reaching time point when the internal temperature state is consistent with a preset temperature steady state.

[0078] The internal temperature state is a parameter value that reflects the internal temperature state of the generator, wherein the internal temperature state includes a stable temperature state and a temperature changing state. The stable temperature state means that the temperature change value is always within a small range, that is, the state when the temperature tends to be stable. The temperature changing state means that the temperature change value is still large to indicate that the temperature is still rising. For the specific determination method, refer to steps S200-S2032; when the internal temperature state is consistent with the stable temperature state, it means that the temperature inside the generator has tended to be stable. At this time, the corresponding time point is defined as the steady-state arrival time point for identification to facilitate subsequent analysis.

[0079] Step S103: After the steady state is reached, an analysis is performed based on the internal detection temperature to construct an internal environmental condition, and the internal ignition of the generator is performed when the internal environmental condition is consistent with the preset effective trigger condition.

[0080] The internal environmental conditions refer to the current environmental conditions inside the generator, such as the duration for which the internal temperature tends to be stable, etc. The effective trigger conditions refer to the internal environmental conditions set by the staff that need to be ignited inside the generator to perform performance testing of the generator response. For example, 1 minute after the steady state is reached, the transient data of the generator response can be obtained by igniting the inside of the generator.

[0081] Step S104: constructing a monitoring and analysis interval with a preset monitoring and analysis duration according to the starting time point, and constructing a time-temperature-pressure variation graph according to the time point, the internal detection temperature, and the internal detection pressure in the monitoring and analysis interval.

[0082] The monitoring and analysis duration is the duration of performance monitoring set by the staff. It is a fixed duration. By constructing the monitoring and analysis interval, it is convenient to obtain and analyze the data within the monitoring and analysis duration. The time-temperature-pressure change diagram is a graph that reflects the changes in internal temperature and pressure with time points. It can effectively reflect the performance changes inside the generator. For details, please refer to Figure 2 The images represent the reflection data of the CH5 cylindrical generator.

[0083] Reference Figure 3 The steps of analyzing the internal temperature to determine the internal temperature state include:

[0084] Step S200: constructing a detection interval with a width of a preset detection time length on a preset time axis with the real-time acquisition time point of the internal detection temperature as the rear end point.

[0085] The time axis is a coordinate axis formed by the combination of various time points. The coordinate axis points from the time points that have passed to the time points that have not yet arrived, where the time points that have passed are on the left side of the coordinate axis, and the left side of the coordinate axis is defined as the front side of the time axis; the detection time is the time length designated by the staff, and the division of the detection interval is used to facilitate the judgment of the temperature conditions in a short period of time.

[0086] Step S201 : performing an average calculation based on all internal detected temperatures in a detection interval to determine a detected average temperature.

[0087] The detection mean temperature is the average value of all internal detection temperatures in the detection interval.

[0088] Step S202 : performing calculations based on the detected mean temperature and each internal detected temperature to determine an overall deviation parameter.

[0089] The overall deviation parameter is the deviation parameter between the current detection mean temperature and all internal detection temperatures. The smaller the value, the closer the current detection mean temperature is to each internal detection temperature, which means that the current internal detection temperature has not changed significantly. The calculation formula of the overall deviation parameter is: Where δ is the overall deviation parameter, T Ni is the i-th internal detection temperature, n is the number of all internal detection temperatures, T M To detect the mean temperature, α is a fixed parameter value used in the calculation.

[0090] Step S203: Determine whether the overall deviation parameter is less than a preset stable deviation parameter.

[0091] The stable deviation parameter is the maximum overall deviation parameter allowed when the temperature inside the generator is determined to be stable by the staff. The purpose of the judgment is to know whether the temperature inside the generator has been stabilized.

[0092] Step S2031: If the overall deviation parameter is not less than the stable deviation parameter, the preset temperature change state is determined as the current internal temperature state.

[0093] When the overall deviation parameter is not less than the stable deviation parameter, it means that the temperature inside the generator has not yet stabilized. At this time, the temperature change state can be defined as the internal temperature state.

[0094] Step S2032: If the overall deviation parameter is less than the steady deviation parameter, the temperature steady state is determined as the current internal temperature state, and the front end point of the current detection interval is determined as the steady state arrival time point.

[0095] When the overall deviation parameter is less than the steady deviation parameter, it means that the temperature inside the generator has stabilized. At this time, the temperature steady state can be defined as the internal temperature state, indicating that the internal temperature of the generator at the front end of the current detection interval has stabilized. Therefore, the front end of the detection interval is defined as the steady state arrival time point. The steady state arrival time point can be marked in the change diagram, see Figure 2 .

[0096] Reference Figure 4 After the steady-state arrival time point is determined, the internal medium characteristic analysis method based on the hybrid gas generator also includes:

[0097] Step S300: Obtain the type of the detected product.

[0098] The test product type is the model type of the product currently being tested, such as CH5, G2P, SH5, etc.

[0099] Step S301: Determine the external temperature reaching time corresponding to the product type to be tested according to a preset external temperature matching relationship.

[0100] The external temperature reaching time is the time corresponding to when the external temperature of the generator approaches stability, which is obtained by testing the external temperature of the generator in the historical data. Different types of testing products respond differently, so the corresponding external temperature reaching time is also different. The external temperature matching relationship between the two can be constructed by the staff based on the data from the previous performance testing using external temperature.

[0101] Step S302: defining the detected product types other than the current detected product type recorded in the external matching relationship as comparison product types, and defining the external temperature in place time corresponding to the comparison product type as the comparison in place time.

[0102] Define the comparison product type and comparison duration to distinguish different data and facilitate subsequent analysis.

[0103] Step S303: define the comparison product types whose comparison completion time is adjacent to the external temperature completion time as adjacent product types, determine the internal temperature compliance time according to the adjacent product types, and construct the required compliance range according to the internal temperature compliance time.

[0104] Adjacent product types are defined to identify product types whose external temperature in place time is adjacent to the external temperature in place time of the current product type, which means that the external temperature in place time of the current tested product type during the external temperature testing process is between the external temperature in place time of the adjacent product types. Since the external temperature cannot reflect the specific internal temperature conditions, but the time for the temperature to stabilize is relatively certain, the time of the current tested product type should be between the two adjacent product types regardless of internal or external temperature; the internal temperature reaching standard time is the time value from the starting time point to the steady-state arrival time point obtained when the internal performance test of the adjacent product type is performed. When the product is not tested, the product will not be recorded in the external temperature matching relationship; the required standard range is the time range that the current generator needs to be in to reach a temperature stable state when conducting an effective test, and the two endpoints of the range are the two determined internal temperature reaching standard time lengths.

[0105] Step S304: determining the duration of the thermal environment application according to the starting time point and the steady-state reaching time point, and judging whether the duration of the thermal environment application is within the required standard range.

[0106] The duration of applying the thermal environment is the time from the start of the test to the time when the temperature inside the generator tends to be stable. The purpose of the judgment is to know whether the temperature inside the current gas is rising normally.

[0107] Step S3041: If the duration of application of the thermal environment is within the required standard range, a qualified change signal is output.

[0108] When the duration of thermal environment application is within the required standard range, it means that the current detection test meets the temperature change requirements. At this time, a qualified change signal can be output for identification.

[0109] Step S3042: If the duration of application of the thermal environment is not within the required standard range, an abnormal change signal is output.

[0110] When the duration of thermal environment application is not within the required standard range, it indicates that there is an abnormality in the current temperature change. At this time, there may be external conditions that affect the internal performance test, such as the test system not being sealed. Therefore, an abnormal change signal is output to identify the situation, so that the staff can intervene in time to reduce the subsequent invalid ignition of the generator, thereby improving the stability of the test.

[0111] Reference Figure 5 After the steady-state arrival time point is determined, the internal medium characteristic analysis method based on the hybrid gas generator also includes:

[0112] Step S400: performing calculations based on the detected mean temperature of the current detection interval and the preset steady-state required temperature to determine the deviation temperature ratio.

[0113] The steady-state required temperature is the temperature value that needs to be reached theoretically when the internal temperature of the generator is stable under the current thermal operation rules. Taking the above 107°C as an example, the corresponding steady-state required temperature is 107°C; the deviation temperature ratio is a parameter value that reflects the deviation between the determined detection mean temperature and the steady-state required temperature. The calculation formula is: Where σ is the deviation temperature ratio, T B is the steady-state demand temperature, and β is the adjustment coefficient set by the staff. The larger the steady-state demand temperature, the larger the corresponding adjustment coefficient. The specific relationship between the adjustment coefficient and the steady-state demand temperature is set in advance by the staff.

[0114] Step S401: determining whether the temperature deviation ratio is greater than a preset temperature deviation ratio.

[0115] The deviation requirement ratio is the maximum deviation temperature ratio allowed when the temperature set by the staff to be stable meets the requirements of the current hot operation rules. The purpose of the judgment is to know whether the current stable temperature meets the requirements.

[0116] Step S4011: If the deviation temperature ratio is greater than the deviation demand ratio, a temperature anomaly signal is output.

[0117] When the deviation temperature ratio is greater than the deviation demand ratio, it indicates that there is an abnormality in the stable temperature of the area, that is, the current test system cannot meet the ignition requirements. Therefore, a temperature abnormality signal is output to identify the situation for subsequent analysis.

[0118] Step S4012: If the deviation temperature ratio is not greater than the deviation requirement ratio, then the internal environmental condition is established after the change qualified signal is output.

[0119] When the deviation temperature ratio is not greater than the deviation requirement ratio, it indicates that the current test system meets the requirements of subsequent performance tests, and the analysis can be carried out normally.

[0120] Reference Figure 6 After the temperature anomaly signal is output, the internal medium characteristic analysis method based on the hybrid gas generator also includes:

[0121] Step S500: Obtain the historical usage time of the current temperature sensor.

[0122] The historical usage duration is the duration of time the currently used temperature sensor is put into various generator performance tests, which can be obtained by analyzing the historical data collection time of the temperature sensor.

[0123] Step S501: Determine whether the historical usage time is greater than the preset security protection time.

[0124] The safety protection time is the maximum historical usage time allowed when the staff determines that the temperature sensor is unlikely to be damaged. The purpose of the judgment is to determine whether the output of the current abnormal temperature signal is likely to be caused by damage to the temperature sensor.

[0125] Step S5011: If the historical usage time is greater than the safety protection time, a damaged reference signal is output.

[0126] When the historical usage time is longer than the safety protection time, it indicates that the output of the current temperature abnormality signal may be caused by damage to the temperature sensor. At this time, a damage reference signal is output to identify the situation, thereby providing a reference for subsequent staff to conduct abnormality troubleshooting.

[0127] Step S5012: If the historical usage time is not greater than the security protection time, a sealing reference signal is output.

[0128] When the historical usage time is not greater than the safety protection time, it means that the output of the current temperature abnormality signal is less likely to be caused by damage to the temperature sensor, that is, it is more likely to be caused by poor sealing of the test system itself. At this time, a sealing reference signal is output to identify the situation, thereby providing a reference for subsequent staff to conduct abnormality investigation.

[0129] Reference Figure 7 After the time-temperature-pressure variation diagram is constructed, the internal medium characteristic analysis method based on the hybrid gas generator also includes:

[0130] Step S600: The time point when ignition is performed inside the generator is defined as a physical trigger point.

[0131] The physical trigger point is the point in time at which ignition actually occurs inside the generator.

[0132] Step S601: After the physical trigger point, a unit interval is constructed with the current time point as the rear end point and a width of a preset unit time length, and a calculation is performed at the front and rear end points of the unit interval based on the internal detection temperature to determine the unit change temperature, and a calculation is performed based on the internal detection pressure to determine the unit change pressure.

[0133] The unit duration is a fixed duration set by the staff. Generally, the unit duration is the data acquisition frequency duration. By constructing a unit interval, it is convenient to obtain data within the unit duration. The unit change temperature is the change value of the internal detection temperature after ignition, and the unit change pressure is the change value of the internal detection pressure after ignition.

[0134] Step S602: The front end point of the unit interval corresponding to the unit change temperature being greater than the preset allowable change temperature is defined as a temperature response point, and the front end point of the unit interval corresponding to the unit change pressure being greater than the preset allowable change pressure is defined as a pressure response point.

[0135] The allowable change temperature is the minimum unit change temperature set by the staff to be reached when the internal temperature deviates from the stable temperature of the current thermal operation rules. When the unit change temperature is greater than the allowable change temperature, it means that the system is identified as ignited at this point in time, so the temperature response point is defined for identification; similarly, the allowable change pressure is the unit change pressure set by the staff to be reached when the internal detection pressure has a significant change. The pressure response point is defined to identify the ignition of the test system.

[0136] Step S603 : Analyze the physical trigger point and the temperature response point to determine the temperature response delay, and analyze the physical trigger point and the pressure response point to determine the pressure response delay.

[0137] Temperature response delay is the interval between the physical trigger point and the temperature response point. Pressure response delay is the interval between the physical trigger point and the pressure response point.

[0138] Step S604: Correct and update the time-temperature-pressure variation diagram according to the temperature response delay and the pressure response delay.

[0139] The temperature response delay can be used to adjust the curve between time and temperature, thereby eliminating the performance analysis interference caused by data delay. Similarly, the pressure response delay can be used to adjust the curve between time and air pressure, facilitating the analysis of the internal performance of the generator.

[0140] Reference Figure 8 After the time-temperature-pressure variation diagram is corrected and updated, the internal medium characteristic analysis method based on the hybrid gas generator also includes:

[0141] Step S700: constructing a pre-activation phase interval according to the starting time point and the steady-state reaching time point.

[0142] The pre-activation stage interval is the interval when the generator has not yet been ignited. The identification of this interval can better distinguish different stages inside the generator.

[0143] Step S701: defining the detection intervals except the pre-activation phase interval as activation operation phase intervals.

[0144] Defining the activation phase interval can distinguish the time intervals during which ignition occurs inside the generator.

[0145] Step S702 : defining the maximum internal detected temperature in the activation operation phase as the upper limit reaction temperature, and defining the time point corresponding to the upper limit reaction temperature as the highest peak point.

[0146] Define the upper limit temperature of the reaction and the highest peak point to mark special data in the time-temperature-pressure change diagram, which facilitates subsequent performance analysis by staff.

[0147] Reference Figure 9 Based on the same inventive concept, an embodiment of the present invention provides an internal medium characteristic analysis system based on a hybrid gas generator, comprising:

[0148] An acquisition module, connected to the processing module and the judgment module, is used to acquire information;

[0149] A processing module, connected to the acquisition module and the judgment module, for storing and processing information;

[0150] The judgment module is connected with the acquisition module and the processing module and is used for judging the information;

[0151] The processing module controls the test system to be built into a preset controlled thermal environment unit, and controls the controlled thermal environment unit to apply a thermal environment according to a preset thermal operation rule, and defines the time point when the thermal environment application starts as a starting time point;

[0152] The acquisition module acquires the internal detection temperature and internal detection pressure in real time, wherein the internal detection temperature is acquired by a temperature sensor sealed at a preset detection position inside the generator, and the internal detection pressure is acquired by a pressure sensing channel connected to an existing interface of the generator;

[0153] The processing module analyzes the internal temperature detection to determine the internal temperature state, and defines a steady state arrival time point when the judgment module determines that the internal temperature state is consistent with a preset temperature steady state;

[0154] The processing module analyzes the internal detected temperature to construct the internal environmental conditions after the steady state is reached, and ignites the generator internally when the judgment module determines that the internal environmental conditions are consistent with the preset effective trigger conditions;

[0155] The processing module constructs a monitoring and analysis interval with a preset monitoring and analysis duration based on the starting time point, and constructs a time-temperature-pressure variation graph based on the time point, the internal detection temperature, and the internal detection pressure in the monitoring and analysis interval;

[0156] An internal temperature state determination module is used to more accurately determine the internal temperature state;

[0157] Sealing condition analysis module, used to effectively analyze the sealing condition of the test system;

[0158] Steady-state abnormality analysis module, used to effectively analyze whether the steady-state temperature is abnormal;

[0159] Device damage analysis module, used to effectively analyze the damage of temperature sensors;

[0160] The change graph correction module corrects the acquired time-temperature-pressure interval according to the data delay to improve the accuracy;

[0161] The change graph annotation module intelligently marks some feature data based on the acquired change graph;

[0162] Those skilled in the art will clearly understand that for the sake of convenience and brevity, the division of the above-mentioned functional modules is only used as an example for illustration. In actual applications, the above-mentioned functions can be assigned to different functional modules as needed, that is, the internal structure of the device can be divided into different functional modules to complete all or part of the functions described above. The specific working processes of the above-mentioned systems, devices, and units can refer to the corresponding processes in the aforementioned method embodiments and will not be repeated here.

Claims

1. A method for analyzing the internal medium characteristics of a hybrid gas generator, characterized in that: include: The control test system is built into a preset controlled thermal environment unit, and controls the controlled thermal environment unit to apply the thermal environment according to a preset thermal operation rule, and defines the time point when the thermal environment application starts as the starting time point; Real-time acquisition of internal detection temperature and internal detection pressure, wherein the internal detection temperature is acquired by a temperature sensor sealed at a preset detection position inside the generator, and the internal detection pressure is acquired by a pressure sensing channel connected to an existing interface of the generator; Analyze the internal temperature according to the internal temperature detection to determine the internal temperature state, and define a steady state arrival time point when the internal temperature state is consistent with a preset temperature steady state; After reaching the steady state time point, the internal detection temperature is analyzed to establish the internal environmental conditions, and the internal ignition of the generator is performed when the internal environmental conditions are consistent with the preset effective trigger conditions; A monitoring and analysis interval with a preset monitoring and analysis duration is constructed based on the starting time point, and a time-temperature-pressure change graph is constructed in the monitoring and analysis interval based on the time point, internal detection temperature, and internal detection pressure.

2. The method for analyzing internal medium characteristics of a hybrid gas generator according to claim 1, characterized in that: The steps of analyzing the internal temperature to determine the internal temperature state include: On a preset time axis, a detection interval with a width of a preset detection time length is constructed with the real-time acquisition time point of the internal detection temperature as the rear end point; Calculating the average value of all internal detected temperatures in the detection interval to determine the detection average temperature; Calculate the overall deviation parameter based on the detected mean temperature and each internal detection temperature; Determine whether the overall deviation parameter is less than the preset stable deviation parameter; If the overall deviation parameter is not less than the stable deviation parameter, the preset temperature change state is determined as the current internal temperature state; If the overall deviation parameter is less than the steady deviation parameter, the temperature steady state is determined as the current internal temperature state, and the front end point of the current detection interval is determined as the steady state arrival time point.

3. The method for analyzing internal medium characteristics of a hybrid gas generator according to claim 2, characterized in that: After the steady-state arrival time point is determined, the internal medium characteristic analysis method based on the hybrid gas generator also includes: Get the test product type; Determine the external temperature in-place time corresponding to the product type being tested based on the preset external temperature matching relationship; The test product types other than the current test product type recorded in the external matching relationship are defined as comparison product types, and the external temperature reaching time corresponding to the comparison product type is defined as comparison reaching time; the comparison product types whose comparison reaching time is adjacent to the external temperature reaching time are defined as adjacent product types, and the internal temperature reaching time is determined based on the adjacent product types, and the required reaching range is constructed based on the internal temperature reaching time; Determine the duration of the thermal environment application based on the starting time point and the steady-state arrival time point, and judge whether the thermal environment application duration is within the required standard range; If the duration of thermal environment application is within the required standard range, a qualified change signal is output; If the thermal environment application time is not within the required standard range, an abnormal change signal will be output.

4. The method for analyzing internal medium characteristics of a hybrid gas generator according to claim 3, characterized in that: After the steady-state arrival time point is determined, the internal medium characteristic analysis method based on the hybrid gas generator also includes: Calculate the deviation temperature ratio based on the mean detection temperature of the current detection interval and the preset steady-state demand temperature; Determine whether the deviation temperature ratio is greater than the preset deviation requirement ratio; If the deviation temperature ratio is greater than the deviation demand ratio, a temperature abnormality signal is output; If the deviation temperature ratio is not greater than the deviation requirement ratio, the internal environmental conditions are established after the change qualified signal is output.

5. The method for analyzing internal medium characteristics of a hybrid gas generator according to claim 4, characterized in that: After the temperature anomaly signal is output, the internal medium characteristic analysis method based on the hybrid gas generator also includes: Get the historical usage time of the current temperature sensor; Determine whether the historical usage time is greater than the preset security protection time; If the historical usage time is longer than the safety protection time, a damaged reference signal is output; If the historical usage time is not greater than the safety protection time, a sealing reference signal is output.

6. The method for analyzing internal medium characteristics of a hybrid gas generator according to claim 1, characterized in that: After the time-temperature-pressure variation diagram is constructed, the internal medium characteristics analysis method based on the hybrid gas generator also includes: The time point when ignition occurs inside the generator is defined as the physical trigger point; After the physical trigger point, a unit interval with the current time point as the rear end point and a width of a preset unit time length is constructed, and a unit temperature change is determined based on the internal detection temperature at the front and rear end points of the unit interval, and a unit pressure change is determined based on the internal detection pressure; The front end point of the unit interval corresponding to the unit change temperature being greater than the preset allowable change temperature is defined as the temperature response point, and the front end point of the unit interval corresponding to the unit change pressure being greater than the preset allowable change pressure is defined as the pressure response point; Analyzing the physical trigger point and the temperature response point to determine the temperature response delay, and analyzing the physical trigger point and the pressure response point to determine the pressure response delay; The time-temperature-pressure change diagram is corrected and updated according to the temperature response delay and the pressure response delay.

7. The method for analyzing internal medium characteristics of a hybrid gas generator according to claim 6, characterized in that: After the time-temperature-pressure variation diagram is corrected and updated, the internal medium characteristic analysis method based on the hybrid gas generator also includes: Construct the pre-activation phase interval based on the starting time point and the steady-state arrival time point; The intervals in the detection interval except the pre-activation stage interval are defined as the activation operation stage interval; The maximum internal detection temperature in the activation operation phase is defined as the upper limit reaction temperature, and the time point corresponding to the upper limit reaction temperature is defined as the highest peak point.

8. An internal medium characteristic analysis system based on a hybrid gas generator, characterized in that: include: An acquisition module, connected to the processing module and the judgment module, is used to acquire information; A processing module, connected to the acquisition module and the judgment module, for storing and processing information; The judgment module is connected with the acquisition module and the processing module and is used for judging the information; The processing module controls the test system to be built into a preset controlled thermal environment unit, and controls the controlled thermal environment unit to apply a thermal environment according to a preset thermal operation rule, and defines the time point when the thermal environment application starts as a starting time point; The acquisition module acquires the internal detection temperature and internal detection pressure in real time, wherein the internal detection temperature is acquired by a temperature sensor sealed at a preset detection position inside the generator, and the internal detection pressure is acquired by a pressure sensing channel connected to an existing interface of the generator; The processing module analyzes the internal temperature detection to determine the internal temperature state, and defines a steady state arrival time point when the judgment module determines that the internal temperature state is consistent with a preset temperature steady state; The processing module analyzes the internal detected temperature to construct the internal environmental conditions after the steady state is reached, and ignites the generator internally when the judgment module determines that the internal environmental conditions are consistent with the preset effective trigger conditions; The processing module constructs a monitoring and analysis interval with a preset monitoring and analysis duration according to the starting time point, and constructs a time-temperature-pressure variation diagram according to the time point, the internal detection temperature and the internal detection pressure in the monitoring and analysis interval.

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