Data acquisition method of one-to-two signal transfer box for rocket power device test

Abstract

The invention provides a data acquisition method of a one-to-two signal transfer box for a rocket power device test, and belongs to the technical field of data acquisition, and the method comprises the steps: carrying out the dynamic adjustment of the sampling frequency of an acquisition system according to the frequency characteristics of signal changes at different stages of the rocket power device test; performing signal acquisition on the different adjusted acquisition systems based on a one-to-two signal transfer box to obtain a first path of signals and a second path of signals; respectively carrying out signal noise reduction and enhancement preprocessing on the first path of signal and the second path of signal after each dynamic adjustment to obtain a corresponding first reserved signal and a corresponding second reserved signal; and carrying out anomaly analysis and alarm reminding on the first retention signal and the second retention signal, and meanwhile, storing the first retention signal and the second retention signal in different storage media. And the integration of acquisition setting and the integrity of data acquisition are ensured.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of data acquisition, in particular to a data acquisition method of a one-to-two signal switching box for rocket power device test. BACKGROUND

[0002] In the process of rocket power device test, the test data of key parameters can reflect the working stability state of the engine, and is also an important basis for post-test analysis, therefore, it is very important to ensure the accuracy and reliability of data test; In the rocket power device test, in order to ensure normal data test and improve accuracy and reliability, the acquisition system is usually tested before the test, but it cannot be guaranteed that the acquisition system will not appear abnormal condition to cause data loss during the test process, in order to prevent this phenomenon, two sensors are installed at the same position of the engine during the engine test, but in the actual process, due to the small space of the engine and many pipelines, it is impossible to install two sensors at the same position, which leads to the phenomenon of reducing the collected data, and cannot provide reliable data analysis basis for ensuring whether the engine test is successful.

[0003] Therefore, the present application provides a data acquisition method of a one-to-two signal switching box for rocket power device test. SUMMARY

[0004] The present application provides a data acquisition method of a one-to-two signal switching box for rocket power device test, by setting a one-to-two signal switching box to facilitate the integration of the acquisition structure, and using a one-to-two signal box to sequentially collect different dynamically adjusted signals, to ensure the integrity of the collected data, to provide a data basis for analyzing whether the engine test is successful, and to effectively ensure the reliability of the data by noise reduction and enhancement processing, abnormality and alarm of the signal.

[0005] The present application provides a data acquisition method of a one-to-two signal switching box for rocket power device test, comprising: Step 1: dynamically adjusting the sampling frequency of the acquisition system according to the frequency characteristics of the signal changes in different stages of the rocket power device test; Step 2: based on the one-to-two signal switching box, collecting signals of the acquisition system after different adjustments to obtain a first signal and a second signal; Step 3: respectively performing signal noise reduction and enhancement preprocessing on the first signal and the second signal after each dynamic adjustment to obtain corresponding first reserved signals and second reserved signals; Step 4: performing abnormality analysis and alarm reminding on the first reserved signal and the second reserved signal, and storing the first reserved signal and the second reserved signal into different storage media.

[0006] Preferably, the one-to-two signal adapter box comprises: a box shell, a box body; The box shell is provided with heat dissipation holes on the side surface, and the box body is installed in the box shell; The front surface of the box body is provided with an M1 input signal connector, an M1 current output I signal connector, and a three-way power supply connector; The back surface of the box body is provided with an M1 current output II signal connector; One end of the input signal connector is connected to a sensor, and the other end of the input signal connector is connected to a one-to-two module; The one-to-two module is used to output the input signal as two current signals, and the current output I signal is connected to a first acquisition device, and the current output II signal is connected to a set acquisition device.

[0007] Preferably, the signal input, two-way signal output and power supply of the one-to-two signal adapter box are connected in the form of connectors, and labels are printed on the front panel and back panel of the box body; The input signal connector and the current output I signal connector both use four-core connectors, the current output II signal connector uses a DB9 connector, and the power supply connector uses a three-core connector.

[0008] Preferably, the one-to-two module adopts a thin plug-in structure, and is installed through guide rails, and the one-to-two module has isolation measures between the input, the first output, the second output and the power supply; The box shell and the box body are respectively made of aluminum alloy material.

[0009] Preferably, the one-to-two signal adapter box is internally arranged with 16 one-to-two modules, and the one-to-two modules are distributed in upper and lower layers, with 8 modules in each layer, wherein the upper layer is arranged with current-to-current one-to-two modules, and the lower layer is arranged with voltage-to-current one-to-two modules, and the one-to-two signal adapter box is also internally arranged with a power supply terminal row for supplying power to the one-to-two modules.

[0010] Preferably, the sampling frequency of the acquisition system is dynamically adjusted, comprising: Using a deep learning algorithm to train historical test data of different test stages to establish a mapping relationship between signal frequency characteristics and sampling frequency; Based on the mapping relationship, a set of sampling frequencies of the rocket power device in the corresponding test stage is obtained, wherein the set of sampling frequencies includes a test frequency and signal frequency characteristics for the test frequency; Verifying the trained algorithm in turn according to each test frequency in the sampling frequency set to obtain a test signal corresponding to the test frequency and extract key features; Analyzing a difference coefficient of the key features and signal frequency characteristics under each test frequency; If the difference coefficient is less than a preset coefficient, the corresponding test frequency is kept unchanged; If the difference coefficient is not less than the preset coefficient, a signal point where an anomaly first occurs in the corresponding test signal is locked, the corresponding test signal is filtered based on a sliding window at the signal point, and a peak value first occurring and a valley value first occurring in the filtered signal are located by using an extreme value detection function to determine a first updated frequency; A second updated frequency is determined based on all peak values and all valley values in the filtered signal; The first updated frequency is input into the trained model to obtain a first comparison signal of the rocket power device in the corresponding test stage; The second updated frequency is input into the trained model to obtain a second comparison signal of the rocket power device in the corresponding test stage; A first frequency variance of the first comparison signal and a second frequency variance of the second comparison signal are respectively determined; The test frequency in the corresponding test stage is dynamically adjusted according to the first frequency variance and the second frequency variance; ; Wherein, represents the dynamically adjusted frequency; represents the test frequency in the corresponding test stage; represents the first frequency variance; represents the second frequency variance; and

[0011] Preferably, each signal is preprocessed by noise reduction and enhancement, including: A signal source framework of each signal is obtained, process interference factors of devices existing in the signal source framework are analyzed, and a factor set is constructed according to a component sequence from input to output of the signal source framework; Timing labels are supplemented into the factor set, an influence coefficient of each detection factor in the factor-timing set is determined by detecting a timing point and a device number of the detection factor, and

[0012] Wherein, represents the influence coefficient of the xth detection factor; represents a total number of timing points involved in the xth detection factor; represents a total number of timing points involved in each signal. This represents the total number of device numbers involved under the x-th detection factor; This indicates the total number of devices involved in the signal source architecture for each signal; This represents the total weight of the device number involved under the x-th detection factor; Based on the influence coefficients involved in each individual circuit block in the signal source architecture, determine the noise reduction coefficient and enhancement coefficient of the corresponding individual circuit block; All the acquired noise reduction coefficients and enhancement coefficients are averaged to determine the overall noise reduction coefficient and the overall enhancement coefficient. Obtain the preprocessing method that matches the overall noise reduction coefficient and the overall enhancement coefficient from the dual coefficient-method lookup table, and perform noise reduction and enhancement preprocessing on the corresponding signal.

[0013] Preferably, determining the noise reduction coefficient and enhancement coefficient for each individual circuit block includes: Calculate different individual circuit blocks The final coefficient;

[0014] in, Indicates a single circuit block The final coefficient; Indicates a single circuit block Involved The average value; Based on the final coefficients, calculate the noise reduction coefficient and enhancement coefficient for the corresponding individual circuit block;

[0015] Among them, Sum Jy represents the sum of the final coefficients of the device numbers involved in the individual circuit block; Jy represents the noise reduction threshold. This represents the noise reduction coefficient for the corresponding individual circuit block; This indicates setting the threshold for the influence coefficient; The total number of components present in a single circuit block;

[0016] Among them, Sum Zy represents the sum of the final coefficients of the device numbers involved in the individual circuit block; Zy represents the enhancement threshold. This represents the enhancement factor for a given individual circuit block.

[0017] The application provides an electronic device, comprising a memory, a processor and a computer program stored on the memory and executable on the processor, wherein the processor implements the data acquisition method of the one-to-two signal switching box for rocket power device test when executing the program.

[0018] The application provides a non-transient computer readable storage medium, which stores a computer program, wherein the computer program implements the data acquisition method of the one-to-two signal switching box for rocket power device test when executed by a processor.

[0019] Compared with the prior art, the application has the following beneficial effects: The one-to-two signal switching box is provided to facilitate the integration of the acquisition structure, and the one-to-two signal switching box is used to sequentially acquire signals after different dynamic adjustments, so that the integrity of the acquired data is ensured, a data basis for analyzing whether the engine test is successful is provided, and then the reliability of the data is effectively ensured through noise reduction and enhancement processing, abnormality and alarm of the signals. BRIEF DESCRIPTION OF DRAWINGS

[0020] In order to more clearly illustrate the technical solutions in the application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or the prior art description. Obviously, the drawings in the following description are some embodiments of the application, and other drawings can be obtained by those skilled in the art without creative labor.

[0021] Figure 1 is a flowchart of the data acquisition method of the one-to-two signal switching box for rocket power device test provided by the embodiment of the application; Figure 2 is a one-to-two switching box main body schematic diagram provided by the embodiment of the application; Figure 3 is a one-to-two switching box main body front view provided by the embodiment of the application; Figure 4 is a one-to-two switching box main body rear view provided by the embodiment of the application; Figure 5 is a one-to-two signal switching line internal arrangement diagram provided by the embodiment of the application; Figure 6 is a signal input signal connector and current output I connector schematic diagram provided by the embodiment of the application; Figure 7 is a current output II connector schematic diagram provided by the embodiment of the application; Figure 8 is a power connector schematic diagram provided by the embodiment of the application; Figure 9The current-to-current one-to-two module wiring diagram provided by the embodiment of the application; Figure 10 The voltage-to-current one-to-two module wiring diagram provided by the embodiment of the application. DETAILED DESCRIPTION

[0022] To make the objectives, technical solutions and advantages of the present application clearer, the technical solutions in the present application will be described below in connection with the drawings in the present application. Obviously, the described embodiments are only some of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the protection scope of the present application.

[0023] The present application provides a data acquisition method of a one-to-two signal switching box for rocket power device test, as shown in Figure 1 The method comprises the following steps: Step 1: dynamically adjusting the sampling frequency of the acquisition system according to the frequency characteristics of signal changes in different stages of the rocket power device test; Step 2: acquiring signals by the one-to-two signal switching box based on the acquisition system after different adjustments to obtain a first signal and a second signal; Step 3: respectively performing signal denoising and enhancement preprocessing on the first signal and the second signal after each dynamic adjustment to obtain corresponding first reserved signals and second reserved signals; Step 4: performing abnormality analysis and alarm reminding on the first reserved signals and the second reserved signals, and storing the first reserved signals and the second reserved signals into different storage media.

[0024] In the embodiment, the different stages of the rocket power device test refer to different periods or steps divided in the rocket power device test process. For example, the starting stage of the engine, in which the engine starts to operate from the static state, and each component gradually enters the working state; the stable working stage, in which the engine reaches the stable working state, and each parameter is relatively stable; the shutdown stage, in which the engine starts to stop working, and each parameter gradually decreases to zero. The working states of the engine in different stages are different, and the generated signal characteristics are also different.

[0025] In this embodiment, the frequency characteristics of different stages refer to the performance of signals at different frequencies. It includes the frequency components of the signal, the amplitude and phase relationship of each frequency component, etc. For example, in the rocket power device test, due to the instability of the combustion process, mechanical vibration and other factors, signals of different frequencies will be generated. High-frequency signals may be related to the rapid combustion process inside the engine or the high-frequency vibration of the components, and low-frequency signals may be related to the structural vibration of the engine as a whole or the slow change of the fuel supply system. By analyzing the frequency characteristics of the signal, the working state of the engine at different stages can be understood, and whether there is an abnormal situation can be judged.

[0026] In this embodiment, the first signal and the second signal are two signals collected by the one-to-two signal switching box.

[0027] In this embodiment, the abnormality analysis is performed by comparing the first reserved signal and the second reserved signal with the standard range respectively. If 1 / 5 or more of the signal values in the reserved signal are not within the corresponding range, it is considered abnormal and an alarm is given. The alarm sends the abnormal signal value to the reminder end, which includes but is not limited to mobile phones, computers, laptops, etc.

[0028] The beneficial effects of the above technical solutions are: by setting a one-to-two signal switching box, the integration of the collection structure is facilitated, and the one-to-two signal box is used to collect signals adjusted dynamically in sequence, ensuring the integrity of the collected data, providing a data basis for analyzing whether the engine test is successful, and then through noise reduction and enhancement processing, abnormality and alarm of the signal, the reliability of the data is effectively ensured.

[0029] The present application provides a data collection method for a one-to-two signal switching box for rocket power device test, the one-to-two signal switching box comprising: a box shell and a box body; The box shell is provided with a heat dissipation hole, and the box body is installed in the box shell; The front of the box body is provided with an M1 input signal connector, an M1 current output I signal connector and a three-way power connector; The back of the box body is provided with an M1 current output II signal connector; One end of the input signal connector is connected to a sensor, and the other end of the input signal connector is connected to a one-to-two module; The one-to-two module is used to output the input signal as two current signals, and the current output I signal is connected to a first collection device, and the current output II signal is connected to a set collection device.

[0030] Preferably, the signal input, two-way signal output and power supply of the one-to-two signal switching box are connected by connectors, and labels are printed on the front panel and back panel of the box body. The input signal connector and the current output I signal connector are both four-core connectors, and the current output II signal connector is a DB9 connector; the power connector is a three-core connector.

[0031] Preferably, the one-to-two module adopts a thin plug-in structure, and the one-to-two module is installed through a guide rail, and the one-to-two module has isolation measures between the input, the first output, the second output, and the power supply. The box shell and the box body are respectively made of aluminum alloy.

[0032] Preferably, the one-to-two signal switching box is internally arranged with 16 one-to-two modules, and the one-to-two modules are distributed in an upper and lower manner, with 8 modules in each layer, wherein the upper layer is arranged with current-to-current one-to-two modules, and the lower layer is arranged with voltage-to-current one-to-two modules, and the one-to-two signal switching box is further internally arranged with a power supply terminal row for supplying power to the one-to-two modules.

[0033] In this embodiment, M1 generally refers to 16.

[0034] In this embodiment, the heat dissipation holes are provided to ensure the heat dissipation needs of the equipment in the switching box, so as to ensure that the equipment can normally operate in a suitable temperature environment.

[0035] In this embodiment, the connector mode is adopted for connection, which can realize quick connection and effectively reduce the workload.

[0036] In this embodiment, the labeling is to prevent the occurrence of connection mistakes, and improve the accuracy and convenience of the switching box connection.

[0037] In this embodiment, the three power supplies of 24V, 15V, and ±15V have strong compatibility, which can not only adapt to commonly used sensors in ground tests, but also can be used for engine telemetry sensors, thereby widening the application range and meeting the power supply and signal transmission needs of different sensors in engine tests.

[0038] In this embodiment, the thin plug-in structure is adopted, which can realize high-density installation, and a plurality of one-to-two modules can be installed in a limited space, which helps to save space and improve the integration of the whole equipment. The one-to-two module is installed through a guide rail, which can realize quick installation and is convenient for subsequent maintenance and repair.

[0039] In this embodiment, the response time of the one-to-two module can be set to 180us, which can timely capture the signal changes transmitted by the sensor and rapidly process and output during the engine test, thereby ensuring the timeliness and accuracy of data acquisition.

[0040] The embodiment has high precision, and the precision can be set to 0.1%. During the one-to-two processing of the sensor signal and the subsequent transmission process, the signal distortion can be reduced, and the two current signals output can accurately reflect the characteristics and values of the input signal, thereby providing a strong guarantee for accurate data acquisition and analysis in engine testing.

[0041] In the embodiment, please refer to Figures 2 to 8 , which shows a one-to-two signal switching box. The box mainly includes three important parts. First, a one-to-two switching box main body shell, second, connectors installed on the front and back of the box main body, which are the key interfaces for signal switching and transmission. Finally, a one-to-two module installed inside the box main body. Through the integration of these three key components, a one-to-two signal switching box with high integration level is formed. As shown in Figure 2 , the box main body shell is provided with a mounting plate, and the mounting plate is provided with a circular hole at each corner. The switching box can be fixed in the cabinet through the circular holes. The box main body is provided with heat dissipation holes on both sides, which can guarantee the heat dissipation requirement of the equipment in the switching box and ensure the stable operation of the equipment. The box main body shell is made of aluminum alloy, which has anti-interference ability and is a standard 5U size.

[0042] The one-to-two module can be fixed in the box main body through the guide rail. The cable can be installed in the wire slot of the one-to-two signal switching box to ensure that the cable inside the box main body is not messy and to avoid the mutual entanglement of the cables, thereby facilitating the daily inspection and maintenance of the cables.

[0043] As shown in Figure 3 , Figure 4 , the front of the box main body is provided with 16 signal input signal connectors, 16 current output I connectors and 3 power supply connector interfaces. The back of the box main body is provided with 16 current output II connectors. The signal input and signal output are connected by connectors, which can realize quick connection and improve work efficiency. As shown in Figure 5 , the internal layout of the one-to-two signal switching box is shown. The internal layout has 16 one-to-two modules. These modules are distributed in upper and lower layers, and each layer has 8 modules. The current-to-current one-to-two module can be arranged on the upper layer, and the voltage-to-current one-to-two module can be arranged on the lower layer. In addition, the power supply terminal block is provided for the one-to-two module. As shown in Figure 9The diagram shows the wiring diagram for a current-to-current 1-to-2 splitter module. The current signal sensor uses a two-wire system, so the power supply needs to be connected in series with the sensor and then connected to the splitter module. One end of the input signal connector connects to the sensor, and the other end connects to the input terminal of the splitter module, which is connected to pins 1 and 2 of the splitter module. Current output I of the splitter module connects to the NI acquisition device, which is connected to pins 7 and 8 of the splitter module. Current output II of the splitter module connects to the acquisition device, which is connected to pins 3 and 6 of the splitter module. The power supply for the splitter module is pins 10 and 11. like Figure 10 The diagram shows the wiring diagram for a voltage-to-current 1-to-2 splitter module. The voltage signal sensor requires a separate power supply using a four-wire system. One end of the input signal connector connects to the sensor, and the other end connects to the input terminal of the 1-to-2 splitter module, which is connected to pins 1 and 2 of the module. The current output I of the 1-to-2 splitter module connects to the NI acquisition device, which is connected to pins 7 and 8 of the module. The current output II of the 1-to-2 splitter module connects to the setting acquisition device, which is connected to pins 3 and 6 of the module. The power supply for the 1-to-2 splitter module is pins 10 and 11.

[0044] The beneficial effects of the above technical solution are: it adopts an integrated design, has the advantages of good compatibility and fast data response, solves the problems of installation, wiring and connection of the existing one-to-two modules in engine testing, and improves the efficiency and quality of signal conversion and data acquisition in the engine testing process.

[0045] This invention provides a data acquisition method for a one-to-two signal converter box used in rocket propulsion system testing, comprising dynamically adjusting the sampling frequency of the acquisition system, including: Deep learning algorithms were used to train historical experimental data from different experimental stages to establish a mapping relationship between signal frequency characteristics and sampling frequency; The sampling frequency set of the rocket propulsion device under the corresponding test stage is obtained based on the mapping relationship, wherein the sampling frequency set includes the test frequency and the signal frequency characteristics for the test frequency; The trained algorithm is verified sequentially according to each test frequency in the sampling frequency set to obtain the test signal at the corresponding test frequency and extract key features; Analyze the difference coefficients between the key features and signal frequency characteristics at each test frequency; If the difference coefficient is less than the preset coefficient, the corresponding test frequency remains unchanged; If the difference coefficient is not less than the preset coefficient, then the signal point where the first abnormality occurs in the corresponding test signal is locked, and the corresponding test signal is filtered at the signal point based on the sliding window. The extreme value detection function is used to locate the first peak value and the first valley value in the filtered signal to determine the first update frequency. determining a second update frequency based on all the peak values and all the valley values in the screening signal; inputting the first update frequency into the trained model to obtain a first comparison signal of the rocket power device in the corresponding test stage; inputting the second update frequency into the trained model to obtain a second comparison signal of the rocket power device in the corresponding test stage; determining a first frequency variance of the first comparison signal and a second frequency variance of the second comparison signal, respectively; dynamically adjusting the test frequency of the corresponding test stage according to the first frequency variance and the second frequency variance; ; wherein, denotes the dynamically adjusted frequency; denotes the test frequency of the corresponding test stage; denotes the first frequency variance; denotes the second frequency variance; and ln denotes the logarithmic function symbol.

[0046] In this embodiment, the historical test data refers to various data recorded in the past rocket power device tests. These data include various signal data related to engine operation, such as pressure, temperature, vibration, and other sensor-collected values over time in different test stages.

[0047] Different physical phenomena in the rocket power device test produce signals with different frequency characteristics, reflecting the working state of the engine. The sampling frequency refers to the number of times the signal is sampled per second during data collection.

[0048] In this embodiment, the mapping relationship refers to the ability to accurately capture certain key frequency components and their characteristics of the engine in a certain working stage at a certain sampling frequency. Changing the sampling frequency may result in loss or distortion of these key information. This mapping relationship can help determine the sampling frequency that should be used in different test stages to accurately obtain the frequency characteristics of the engine signals, achieving efficient and accurate data collection and analysis.

[0049] In this embodiment, the preset coefficient can be pre-set to 0.5.

[0050] In this embodiment, the set of sampling frequencies refers to a number of test frequencies (sampling frequencies) existing in this stage and the signal frequency characteristics under each sampling frequency.

[0051] In this embodiment, the periodic test is a test of the rocket power device according to a set period, and the set period is pre-set.

[0052] In this embodiment, the test signal is the signal output based on the model, and the key features of the signal are extracted, that is, the frequency components, the amplitudes and phases of the frequency components.

[0053] In this embodiment, the difference coefficient = sim (key features, signal frequency characteristics).

[0054] In this embodiment, the first abnormal signal point is the point at which the signal value in the test signal is not within the signal setting range for the first time, and the signal setting range is pre-set, for example, the range is (a1, a2), at this time, the signal value c1 in the test signal is not within the range for the first time, and the point at which the signal value c1 in the test signal is regarded as the first abnormal signal point.

[0055] In this embodiment, the size of the sliding window is 10 signal points.

[0056] In this embodiment, The first update frequency = .

[0057] In this embodiment, The second update frequency = .

[0058] It should be noted that when the model is used to output signals of corresponding frequencies, the frequencies between the signals will fluctuate due to errors, so frequency updating is needed.

[0059] In this embodiment, the first frequency variance is the variance of the time length between all adjacent peaks and valleys in the first comparison signal, and the second frequency variance is the variance of the time length between all adjacent peaks and valleys in the second comparison signal.

[0060] In this embodiment, after dynamic adjustment, the relevant adjusted frequency is used to control the collection in the subsequent signal collection process.

[0061] The beneficial effects of the above technical solution are: based on historical test data, the model is trained to verify the model based on different sampling frequencies, the variation coefficient is determined based on the key features and signal frequency characteristics under each test frequency, and then the comparison signal is obtained through coefficient size comparison and peak and valley locking, and then the frequency is reasonably adjusted based on the frequency variance, to ensure the reliability of the dynamic frequency adjustment.

[0062] The present application provides a data acquisition method of a one-to-two signal switching box for rocket power device test, which carries out noise reduction and enhancement preprocessing for each signal, including: obtaining a signal source framework of each signal, and analyzing process interference factors of devices existing in the signal source framework, and constructing a factor set according to a component sequence from input to output of the signal source framework; supplementing a timing label to the factor set, and determining an influence coefficient of a corresponding detection factor by detecting a timing point and a device number of each detection factor in the factor-timing set;

[0063] wherein, an influence coefficient of an xth detection factor; a total number of timing points involved in the xth detection factor; a total number of timing points involved in each signal; a total number of devices of a device number involved in the xth detection factor; a total number of devices involved in the signal source framework of each signal; a total weight of devices of a device number involved in the xth detection factor; determining a to-be-reduced coefficient and a to-be-enhanced coefficient of a corresponding individual circuit block according to the influence coefficient involved in each individual circuit block in the signal source framework; averaging all the to-be-reduced coefficients and the to-be-enhanced coefficients respectively to determine an overall reduction coefficient and an overall enhancement coefficient; obtaining a preprocessing mode matched with the overall reduction coefficient and the overall enhancement coefficient from a double-coefficient-mode correspondence table, and performing noise reduction and enhancement preprocessing on the corresponding signal.

[0064] In this embodiment, the signal source framework includes different connected electrical devices, and the signal acquisition of each signal is realized based on a one-to-two switching box. In the signal acquisition process, the framework includes a sensor, a power supply for the sensor, and a one-to-two switching module connected to one end of the sensor. In more detail, the sensor is also composed of a plurality of small devices, such as resistors, capacitors, etc. For example, when the resistance value changes, it will affect the strength of the signal measured by the sensor, and the resistance value generally changes with temperature.

[0065] In this embodiment, the process interference factor set includes electromagnetic interference, temperature influence, mechanical vibration, etc.

[0066] In this embodiment, the component sequence is the input-output sequence of the signal source framework.

[0067] In this embodiment, the factor set = {interference factors existing in each device in the corresponding signal source framework}.

[0068] Detection Factors - Timing Set = {Interference factors present in each device in the corresponding signal source architecture - the timing points where they occur}.

[0069] In this embodiment, each device in the signal source architecture has its own number, which facilitates accurate identification.

[0070] In this embodiment, a single circuit block refers to a circuit block in the architecture that can perform a single function. For example, there are device 1, device 2, device 3, and device 4, where device 1 and device 2, and device 3 and device 4 can each form a single circuit block.

[0071] In this embodiment, the dual-coefficient-method lookup table includes: overall noise reduction coefficient, overall enhancement coefficient, and preprocessing method based on these two coefficients. The preprocessing method is the signal noise reduction and enhancement method, such as Kalman filtering + adaptive filtering technology.

[0072] Preferably, determining the noise reduction coefficient and enhancement coefficient for each individual circuit block includes: Calculate different individual circuit blocks The final coefficient;

[0073] in, Indicates a single circuit block The final coefficient; Indicates a single circuit block Involved The average value; Based on the final coefficients, calculate the noise reduction coefficient and enhancement coefficient for the corresponding individual circuit block;

[0074] Among them, Sum Jy represents the sum of the final coefficients of the device numbers involved in the individual circuit block; Jy represents the noise reduction threshold. This represents the noise reduction coefficient for the corresponding individual circuit block; This indicates setting the threshold for the influence coefficient; The total number of components present in a single circuit block;

[0075] Among them, Sum Zy represents the sum of the final coefficients of the device numbers involved in the individual circuit block; Zy represents the enhancement threshold. This represents the enhancement factor for a given individual circuit block.

[0076] The beneficial effects of the above technical scheme are: the process interference factors of the device are determined through the signal source framework, and the influence coefficient is calculated in combination with the time sequence label, and then the to-be-enhanced coefficient and the to-be-noise-reduced coefficient are obtained, so that the subsequent pre-processing mode is obtained, and the reliability of signal processing is ensured.

[0077] The application facilitates to ensure the integration of the acquisition structure by arranging the one-to-two signal switching box, and the one-to-two signal box is used to sequentially acquire the signals after different dynamic adjustment, so that the integrity of the acquired data is ensured, and a data basis for analyzing whether the engine test is successful is provided, and then the reliability of the data is effectively ensured through the noise reduction and enhancement processing, abnormality and alarm of the signals.

[0078] The application provides an electronic device, which comprises a memory, a processor and a computer program stored on the memory and executable on the processor, and the processor implements the data acquisition method of the one-to-two signal switching box for rocket power device test when executing the program.

[0079] The application provides a non-transitory computer readable storage medium, which stores a computer program, and the computer program implements the data acquisition method of the one-to-two signal switching box for rocket power device test when executed by a processor.

[0080] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the application, and not to limit them; although the application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: it can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement for part of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solution deviate from the spirit and scope of the technical solutions of the embodiments of the application.

Claims

1. A data acquisition method for a one-to-two signal transfer box used in rocket propulsion device testing, characterized in that, include: Step 1: Based on the frequency characteristics of signal changes at different stages of the rocket propulsion system test, dynamically adjust the sampling frequency of the acquisition system; Step 2: Based on the 1-to-2 signal converter box, the dynamically adjusted acquisition system acquires signals to obtain the first signal and the second signal; Step 3: Perform signal denoising and enhancement preprocessing on the first and second signals after each dynamic adjustment to obtain the corresponding first and second retained signals; Step 4: Perform anomaly analysis and alarm alerts on the first and second reserved signals, and store the first and second reserved signals in different storage media.

2. The data acquisition method of the one-to-two signal transfer box for rocket propulsion device testing according to claim 1, characterized in that, The one-to-two signal adapter box includes: Box shell, box body; The outer shell of the enclosure is provided with heat dissipation holes on the side, and the main body of the enclosure is installed inside the outer shell of the enclosure; The front of the main body of the box is equipped with an M1 input signal connector, an M1 current output I signal connector and three power connectors. The back of the main body of the box is equipped with an M1 current output II signal connector; One end of the input signal connector is connected to the sensor, and the other end of the input signal connector is connected to the one-to-two module; The one-to-two module is used to output the input signal as two current signals, with current output signal I connected to the first acquisition device and current output signal II connected to the designated acquisition device.

3. The data acquisition method of the one-to-two signal transfer box for rocket propulsion device testing according to claim 2, characterized in that, The signal input, two signal outputs, and power supply of the one-to-two signal adapter box are all connected by connectors. The input signal connector and the current output I signal connector are both four-pin connectors, the current output II signal connector is a DB9 connector, and the power connector is a three-pin connector.

4. The data acquisition method of the one-to-two signal transfer box for rocket propulsion device testing according to claim 2, characterized in that, The one-to-two module adopts a thin insert structure and is installed via a guide rail. The one-to-two module has isolation measures between the input, the first output, the second output, and the power supply. The outer shell and the main body of the box are both made of aluminum alloy.

5. The data acquisition method of the one-to-two signal transfer box for rocket propulsion device testing according to claim 2, characterized in that, The 1-to-2 signal converter box has 16 1-to-2 modules inside, and the 1-to-2 modules are distributed vertically, with 8 modules on each layer. The upper layer has current-to-current 1-to-2 modules, and the lower layer has voltage-to-current 1-to-2 modules. The 1-to-2 signal converter box also has power supply terminal blocks inside to supply power to the 1-to-2 modules.

6. The data acquisition method of the one-to-two signal transfer box for rocket propulsion device testing according to claim 1, characterized in that, Dynamically adjusting the sampling frequency of the acquisition system includes: Deep learning algorithms were used to train historical experimental data from different experimental stages to establish a mapping relationship between signal frequency characteristics and sampling frequency; The sampling frequency set of the rocket propulsion device under the corresponding test stage is obtained based on the mapping relationship, wherein the sampling frequency set includes the test frequency and the signal frequency characteristics for the test frequency; The trained algorithm is verified sequentially according to each test frequency in the sampling frequency set to obtain the test signal at the corresponding test frequency and extract key features; Analyze the difference coefficients between the key features and signal frequency characteristics at each test frequency; If the difference coefficient is less than the preset coefficient, the corresponding test frequency remains unchanged; If the difference coefficient is not less than the preset coefficient, then the signal point where the first abnormality occurs in the corresponding test signal is locked, and the corresponding test signal is filtered at the signal point based on the sliding window. The extreme value detection function is used to locate the first peak value and the first valley value in the filtered signal to determine the first update frequency. The second update frequency is determined based on all peak values ​​and all valley values ​​in the filtered signal; The first update frequency is input into the trained model to obtain the first comparison signal of the rocket propulsion device in the corresponding test phase; The second update frequency is input into the trained model to obtain the second comparison signal of the rocket propulsion device in the corresponding test phase; Determine the first frequency variance of the first comparison signal and the second frequency variance of the second comparison signal, respectively. The test frequency for the corresponding test stage is dynamically adjusted according to the first frequency variance and the second frequency variance. ； in, This indicates the dynamically adjusted frequency. This indicates the test frequency for the corresponding test phase; Indicates the variance of the first frequency; represents the second frequency variance; ln represents the logarithmic function symbol.

7. The data acquisition method of the one-to-two signal transfer box for rocket propulsion device testing according to claim 1, characterized in that, Noise reduction and enhancement preprocessing are performed on the first and second signals after each dynamic adjustment, including: Obtain the signal source architecture for each signal, analyze the process interference factors of the devices in the signal source architecture, and construct a factor set according to the input-to-output component order of the signal source architecture; Add time-series labels to the factor set, and determine the influence coefficient of the corresponding detection factor by the time-series point and device number of each detection factor in the detection factor-time-series set; in, This represents the influence coefficient of the x-th detection factor; This represents the total number of time points involved in the x-th detection factor; This indicates the total number of timing points involved in each signal; This represents the total number of device numbers involved under the x-th detection factor; This indicates the total number of devices involved in the signal source architecture for each signal; This represents the total weight of the device number involved under the x-th detection factor; Based on the influence coefficients involved in each individual circuit block in the signal source architecture, determine the noise reduction coefficient and enhancement coefficient of the corresponding individual circuit block; All the acquired noise reduction coefficients and enhancement coefficients are averaged to determine the overall noise reduction coefficient and the overall enhancement coefficient. Obtain the preprocessing method that matches the overall noise reduction coefficient and the overall enhancement coefficient from the dual coefficient-method lookup table, and perform noise reduction and enhancement preprocessing on the corresponding signal.

8. The data acquisition method of the one-to-two signal transfer box for rocket propulsion device testing according to claim 7, characterized in that, Determine the noise reduction coefficient and enhancement coefficient for each individual circuit block, including: Calculate different individual circuit blocks The final coefficient; in, Indicates a single circuit block The final coefficient; Indicates a single circuit block Involved The average value; Based on the final coefficients, calculate the noise reduction coefficient and enhancement coefficient for the corresponding individual circuit block; Among them, Sum Jy represents the sum of the final coefficients of the device numbers involved in the individual circuit block; Jy represents the noise reduction threshold. This represents the noise reduction coefficient for the corresponding individual circuit block; This indicates setting the threshold for the influence coefficient; The total number of components present in a single circuit block; Among them, Sum Zy represents the sum of the final coefficients of the device numbers involved in the individual circuit block; Zy represents the enhancement threshold. This represents the enhancement factor for a given individual circuit block.

9. An electronic device comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, characterized in that, When the processor executes the program, it implements the data acquisition method of the one-to-two signal transfer box for rocket propulsion device testing as described in any one of claims 1 to 8.

10. A non-transitory computer-readable storage medium having a computer program stored thereon, characterized in that, When the computer program is executed by the processor, it implements the data acquisition method of the one-to-two signal transfer box for rocket propulsion device testing as described in any one of claims 1 to 8.

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