CN117499811A - Test data acquisition system for fuel control accessory of aero-engine - Google Patents
Test data acquisition system for fuel control accessory of aero-engine Download PDFInfo
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Abstract
The invention belongs to the field of test data acquisition of fuel control accessories of aeroengines, and relates to a test data acquisition system of fuel control accessories of aeroengines, which comprises an upper computer and a lower computer, wherein an onboard controller, a data communication module and an acquisition module are arranged in the upper computer; the invention has the functions of displaying, storing, interacting and the like of test data, and has the characteristics of being configurable, modularized and portable.
Description
Technical Field
The invention relates to the technical field of test data acquisition of fuel control accessories of an aeroengine, in particular to a configurable, modularized and portable test data acquisition system of the fuel control accessories of the aeroengine based on Labview.
Background
The fuel control accessory of the aeroengine is used as a core component for engine power control, the function and the performance of the fuel control accessory directly determine the quality of an engine, along with the rapid development of multi-electricity and full-electricity technologies of the aeroplane and the engine, new requirements are provided for the functions of the fuel control accessory of the aeroengine, the acquisition rate, the quantity and the precision of test data in the performance test process, the interactivity of operators and test equipment, the visualization of the data and the like, and the early-stage tester has the following defects:
1. the test data acquisition rate is low, so that the loss of a key acquisition process is easy to cause;
2. the visual degree of the test data is low and limited by the limitation of early VB program software development, and the data display of the human-computer interaction interface of a plurality of testers is still in a numerical form, and the visual degree is not as high as a curve form;
3. the dynamic process test data is difficult to collect, and the dynamic response characteristics in the product test process cannot be directly observed due to the limitations of sampling rate and numerical display
Regarding the defects and shortcomings, if corresponding testers of a plurality of products are respectively upgraded and modified, great labor and material costs are required.
Disclosure of Invention
The purpose of the invention is that: the invention provides Labview-based configurable, modularized and portable aeroengine fuel control accessory test data acquisition equipment which can acquire temperature, rotation speed, flow and pressure signal test data of an aeroengine fuel control accessory, has functions of test data display, storage, interaction and the like, and has the characteristics of being configurable, modularized and portable.
The technical proposal of the invention
The utility model provides an aeroengine fuel control annex test data acquisition system, includes host computer and lower computer, the host computer in set up on-board controller, data communication module and collection module, on-board controller link to each other with collection module, collection module is connected with data communication module, the lower computer pass through signal conditioning circuit and be connected with data communication module, the lower computer is with rotational speed, flow, temperature, the pressure sensor data on the aeroengine fuel control annex behind signal conditioning circuit processing, transmit to collection module through data communication module, collection module is with rotational speed, flow, temperature, the pressure data transmission on the aeroengine fuel control annex to on-board controller.
Further, collection module include rotational speed collection integrated circuit board, flow collection integrated circuit board, temperature collection integrated circuit board and pressure collection integrated circuit board, on-board controller all be connected with rotational speed collection integrated circuit board, flow collection integrated circuit board, temperature collection integrated circuit board and pressure collection integrated circuit board, rotational speed collection integrated circuit board, flow collection integrated circuit board, temperature collection integrated circuit board and pressure collection integrated circuit board all are connected with data communication module.
Further, the lower computer collects data of the rotating speed, the flow, the temperature and the pressure sensors, and the data is transmitted to the upper computer for analysis in a communication mode of Ethernet.
Further, the signal conditioning circuit comprises an analog-to-digital conversion circuit, a filter circuit and a storage circuit which are sequentially connected.
Furthermore, the acquisition module realizes the simultaneous acquisition of four physical quantities of voltage, temperature, rotating speed and flow, and the circuit type of each acquisition channel is freely switched through the upper computer so as to ensure that each channel can realize the acquisition of various physical quantities.
Further, during temperature acquisition, temperature sensor data on the fuel control accessory of the aeroengine are acquired through a temperature acquisition card and transmitted to an upper computer; or a temperature sensor on the fuel control accessory of the aeroengine converts a temperature signal into a thermal resistance signal, the thermal resistance signal is transmitted to a voltage acquisition card through a conditioning circuit and a PLC cabinet, and the voltage signal is converted into a temperature signal through an upper computer;
when the rotating speed and the flow are collected, the rotating speed and the flow are output into single-side rectangular waves with the same frequency, the low level of which is smaller than 1VDC and the high level of which is 24V through a signal amplification module in the PLC cabinet; one path is used for PLC acquisition, and the other path is converted into pulse signals with the same frequency and 5V amplitude after being isolated by an optical coupler, so as to be used for frequency card acquisition and flow acquisition cards;
when the pressure signal is acquired, the pressure sensor data on the fuel control accessory of the aeroengine is acquired through the pressure acquisition card, and after the pressure sensor data are processed by the signal conditioning circuit, a voltage signal of 0-5V is output to the pressure acquisition card.
Further, the on-board controller is internally provided with:
the configuration module is used for completing the configuration of each data acquisition channel of the lower computer, and comprises the setting and display configuration of sensor types, excitation sources, sampling rates, zero points and sensitivity parameters;
and (3) an engineering module: the method is used for calibrating the data loading and name mapping loading processes;
and a testing module: the system comprises a pressure sensor, a temperature sensor, a flow sensor, a control module and a control module, wherein the pressure sensor is used for detecting the pressure, the temperature, the flow and the rotating speed of the pressure sensor;
and a debugging module: the system is used for displaying, storing and communicating data;
and a user management module: for adding and deleting users, modifying user categories, and modifying passwords.
Further, the configuration module, the engineering module, the test module and the user management module are two threads: a main thread and a data communication thread; the main thread completes the functions of configuration, loading, calibration, testing, debugging and acquisition, and the data communication thread completes the functions of receiving the data of the lower computer, distributing the data, receiving the instructions of the main thread and sending the instructions to the lower computer; the main thread and the data communication thread communicate data through a data queue and an instruction queue;
the main thread adopts an event structure and a state machine structure; the main thread operation is divided into a plurality of states: initializing state, loading state, calibration state, testing state and exiting state; after the initialization state is completed, the main thread is in a default state, and a user operates on the GUI to generate event-triggered state conversion, so that the main thread operates other states;
the data communication thread adopts the structure of a state machine, and is divided into a plurality of states: initialization state, default state, received data state, sent data state, exit state; after the initialization state is completed, the data communication thread is in a default state, and the states of receiving data and sending data are triggered by timing and according to the state of the data queue, so that the data communication thread runs other states.
Further, the on-board controller also comprises a function selection interface module for carrying out corresponding operation and display for five function modules of configuration, engineering, test, debugging and user management.
Further, a self-checking module is arranged in the configuration module, and the self-checking module has the following functions: after the user configures the functions of each channel, the system encodes the configuration data according to a self-defined transmission format, then downloads the configuration data to a lower computer in a selected communication mode, and after receiving the configuration data, the lower computer decodes the configuration data according to a protocol format and performs corresponding circuit conversion;
after the conversion is completed, the configuration state of each channel is framed again and uploaded to the upper computer, and the upper computer displays the configuration state of each channel to a user in a window mode through analysis again; thus, the purpose of grasping the configuration state of the lower computer in real time is achieved, and the accuracy of data acquisition of the lower computer each time is ensured;
in order to ensure the accuracy of channel configuration and state return information receiving of the lower computer in the configuration process, in the configuration information issuing process, the lower computer sequentially receives the configuration information of each channel according to the front-to-back sequence, then carries out circuit conversion and configuration of the corresponding channel, and finally returns the configuration state of the channel to the upper computer; the circulating interaction with the upper computer completes the configuration of the channel and the receiving of the return information.
The invention has the beneficial effects that:
the invention provides a configurable, modularized and portable aviation engine fuel control accessory test data acquisition device based on Labview, which consists of an upper computer and a lower computer, wherein the lower computer takes an onboard controller as a control core, an acquisition board card for rotating speed, flow, temperature, pressure and the like is arranged for the characteristics of fuel control accessory products, the lower computer completes the functions of data acquisition, signal processing, A/D conversion and the like through the cooperation with the acquisition board card, a signal conditioning circuit and other modules, and the acquired data is transmitted to the upper computer at high speed through the communication mode of Ethernet to carry out various data analysis; the upper computer is designed by LabVIEW software of NI company, has functions of displaying, storing and interacting test data, and has the characteristics of being configurable, modularized and portable.
Drawings
FIG. 1 is a block diagram of a system architecture;
FIG. 2 is a schematic diagram of an NI-1071 chassis;
FIG. 3 is a schematic block diagram of temperature signal acquisition (direct acquisition);
fig. 4 is a schematic block diagram of temperature signal acquisition (indirect acquisition);
FIG. 5 is a schematic block diagram of the speed and flow signal acquisition;
FIG. 6 is a schematic block diagram of pressure signal acquisition;
FIG. 7 is a schematic diagram of a host computer software architecture;
FIG. 8 is a schematic diagram of a login interface;
FIG. 9 is a schematic diagram of a function selection interface;
FIG. 10 is a schematic diagram of configuration information delivery;
FIG. 11 is a schematic diagram of a status information read;
FIG. 12 is a schematic diagram of a board card configuration process;
FIG. 13 is a schematic diagram of an interface double click response procedure;
FIG. 14 is a schematic diagram of a process for obtaining cell attributes;
FIG. 15 is a schematic diagram of a step addition and subtraction program;
FIG. 16 is a diagram of a data display interface;
FIG. 17 is a schematic diagram of an operation interface of the host computer.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention will be clearly and completely described in the following in conjunction with the embodiments of the present invention.
One embodiment of the invention is: the invention provides a Labview-based configurable, modularized and portable aviation engine fuel control accessory test data acquisition system which consists of an upper computer and a lower computer, wherein the lower computer takes an onboard controller as a control core, sets acquisition boards for rotating speed, flow, temperature, pressure and the like aiming at the characteristics of fuel control accessory products, and the lower computer completes the functions of data acquisition, signal processing, A/D conversion and the like through the cooperation with the acquisition boards, a signal conditioning circuit and other modules, and the acquired data is transmitted to the upper computer at high speed in a communication mode of Ethernet to carry out various data analysis; the upper computer is designed by LabVIEW software of NI company, has functions of displaying, storing and interacting test data, and has the characteristics of being configurable, modularized and portable.
In this embodiment, the upper computer includes devices such as an industrial computer and a portable computer, which have an ethernet communication function and a windows or macOS operating system;
in this embodiment, the on-board controller is an NI-1071 controller;
in this embodiment, the acquisition boards are NI-9201, NI-9217, and NI-9361 acquisition boards;
in this embodiment, the signal conditioning circuit is composed of an analog-to-digital conversion circuit, a filter circuit and a storage circuit;
in this embodiment, the configuration is implemented by a software program, and is used to complete the configuration of each acquisition channel of the lower computer, and the configuration mainly includes setting parameters such as a sensor type, an excitation source, a sampling rate, a zero point, and sensitivity. The operations of opening the file, saving the file and the like are also arranged under the menu bar file, so that the repeated configuration information can be conveniently utilized and modified by a user. And when the configuration interface is opened each time, the system automatically reads the last configuration information to the configuration interface. In addition, the drop-down list selected by the sensor on the interface can realize the simultaneous configuration of the acquisition states of a plurality of channels, namely, when a plurality of channels are to be tested by one sensor, the drop-down list can be configured at one time, and the above operations are designed for ensuring the convenience of the system. Most of the operation modes of the configuration interface of the module are to set the numerical values in the list, so that the configuration interface of the system can write and clear the numerical values like Excel software used at ordinary times in order to accord with the operation habits of users;
in this embodiment, the modularization is implemented by a software program, and software programming is performed by adopting a mode of a subprogram and a main program, where the subprogram mainly includes a board configuration subprogram, a data storage subprogram, a filtering subprogram, and the like, and these subprograms are packaged and encapsulated into independent modules, so as to implement modularization;
the innovation point of the invention is that:
the device may be configured to: taking a flow sensor as an example, different types of the flow sensor adopted on different test tables are different due to different product characteristics, and the output electric signals and the flow measurement ranges are also different. The invention can realize quick configuration according to the history book or the factory use instruction book of the sensor, the configuration of the sensor can be completed only by inputting corresponding parameter indexes into a software interface, a developer does not need to change in the background, corresponding functional modules are reserved in the software interface, and a test taker can complete the configuration of the sensor.
And (3) equipment modularization: the equipment adopts the modularized design, in the in-service use process, can carry out the selection of different modules according to actual data acquisition demand, for example need the data channel who gathers less between A experiments, and sampling accuracy requirement is not high, just can use the low accuracy, the integrated circuit board of low sampling channel, need gather multichannel between B experiments, and sampling accuracy requirement is high, just can change the high accuracy collection integrated circuit board that satisfies the demand, realizes the make full use of resource.
Device expansibility: the invention is mainly used for data acquisition in the product test process, but in the software design process, a closed-loop control interface is reserved in consideration of possible use requirements, and the software function of closed-loop control can be performed on the basis of the existing software design of the invention in the later period, so that simple closed-loop control is realized, such as: and (5) position control of the electrohydraulic servo valve.
A second embodiment of the invention is:
the test data acquisition system for the fuel control accessory of the aeroengine is provided:
according to the acquisition requirement of the test data of the product, the functional requirement and the performance requirement of the invention are extracted as follows: 1) Functional requirements are as follows:
a. collecting a pressure signal;
b. collecting a temperature signal;
c. collecting a flow signal;
d. collecting a rotating speed signal;
e. the display device has a function of displaying waveform diagram data;
f. the device has the functions of data storage, playback (zooming in, zooming out, moving, numerical value display at any position on a mouse placement curve) and analysis;
2) Performance requirements
a. Pressure signal acquisition (the pressure signal sensor of the product is of a voltage type, the output voltage range is 0-5V and 1-5V, and all the pressure signal sensors of the product can be covered by setting the voltage acquisition range to be 0-10V);
b. number of pressure signal acquisition channels: 8 channels (which can be increased or decreased according to the requirement);
c. pressure signal acquisition accuracy (refers to the accuracy of acquisition of the electrical signal amplified by the transducer): better than + -0.1% of full scale;
d. temperature signal acquisition: can collect couple type (J type, K type, etc.), resistance type (PT 100, PT200, etc.)
A temperature sensor signal;
e. number of temperature signal acquisition channels: 8 channels (which can be increased or decreased according to the requirement);
f. temperature signal acquisition accuracy (refers to the accuracy of acquisition of the electrical signal amplified by the transmitter): better than + -0.1% of full scale;
g. flow signal acquisition (the flow signal sensor of the product is frequency type, the output frequency range is 0-20000 Hz, and all flow signal sensors of the product can be covered by setting the frequency acquisition range to be 0-25000 Hz);
h. flow signal acquisition channel number: 8 channels (which can be increased or decreased according to the requirement);
i. flow signal acquisition accuracy: is better than +/-1 Hz;
j. rotation speed signal acquisition range: 0-50000 rpm;
k. number of rotational speed signal acquisition channels: 4 channels (which can be increased or decreased according to the requirement);
and I, rotating speed signal acquisition precision: better than + -20 rpm;
m, a data waveform display update period is 20ms;
n, the data storage period is 40-100 ms (adjustable);
data can be stored continuously and intermittently, and the functions are optional (the specific data storage time is determined according to the data storage period and the data playback software capability).
1. Overall design concept
According to the functional performance requirements, the following contents are carded out and used as the design direction in the development process of the invention:
the acquisition system requires an ethernet communication mode. The ethernet communication can complete transmission of system instructions, and is mainly used for high-speed transmission of large data volume of the system.
The acquisition module can realize the multipath simultaneous acquisition of four physical quantities of voltage, temperature, rotating speed and flow, and in addition, the circuit type of each acquisition channel can be switched freely through an upper computer to ensure that each channel can realize the acquisition of various physical quantities.
The invention can realize the large capacity storage of the collected data and has the function of real-time preview besides the requirement of various working modes. The test target can be subjected to preview analysis, and whether the test data is stored or not is determined according to the test condition.
The data file storage format requires that the system file can be stored into three file formats of binary system, TXT and TDMS, and the various file formats can be mutually converted to meet the requirement of the universality of the system.
The requirements on the practical applicability and stability of the system require that the system not only can accurately and stably complete the functions of data acquisition and data analysis, but also has a friendly human-computer interaction interface, thereby ensuring the practical applicability of the system. In addition, there is a high demand for maintainability of the system.
2. Product architecture design
The invention is to meet the demands, it is made up of two parts of data acquisition system and computer, the system includes upper computer and lower computer two modules, the lower computer uses the onboard controller as control core, finish the functions such as data acquisition, signal processing, A/D conversion, etc. through cooperating with acquisition board card, signal conditioning module, transmit the data to the upper computer to carry on multiple data analysis at a high speed through the communication mode of Ethernet finally. The upper computer of the system is designed by adopting LabVIEW 2019 version software of NI company. The functions mainly completed can be summarized as the following two aspects, namely firstly, the interactive control of the system, the reading, displaying and storing of the collected data, the conversion of various file formats and the like are completed through two communication modes. On the other hand, various functional analyses of the acquired data are completed. The overall design of the system is shown in block diagram 1.
2.1 hardware solution design
The hardware of the system comprises an upper computer and a lower computer. The upper computer is mainly used for sending a control instruction to the lower computer, displaying data acquired by the lower computer and calibrating the data acquired by the lower computer acquisition board card; the lower computer is used for realizing data acquisition and hardware filtering of the electric signals.
2.1.1 host computer
According to similar products in industry and mature solutions in industry, and considering economic cost, the hardware configuration of the upper computer is as follows:
display configuration: l2250pwD (23 "liquid crystal) -association;
and (3) configuration of an industrial personal computer:
motherboard IEI industrial grade PCIE-H610-R10;
passive backplane industrial grade IEI;
CPU：INTEL I3 3210 3.2GHz；
memory: 4G DDR3 memory;
hard disk: seagate ST500G SATA;
and a case: IEI industrial-grade rack type, 4U chassis and IEI industrial-grade power supply;
mouse bond: luo Jiguang electrical package;
a CD-ROM drive, a printer interface, a network port and a USB interface;
cable, VGA line.
2.1.2 lower computer
The lower computer adopts an NI CDAQ chassis, and is a core component of the whole equipment. The CDAQ board card is combined with the onboard controller and the clock to collect and operate signals from various sensors, and collected data is transmitted to the upper computer through network communication. The upper computer realizes Labview number acquisition programming and downloading functions, provides a man-machine interface and displays equipment test information.
The lower computer consists of a chassis, a controller and various boards, and the CDAQ chassis component list is shown in table 1. The enclosure adopts an NI 1071 enclosure, and the outline is shown in an opinion figure 2. The drive signal setting and signal acquisition types realized by the industrial personal computer comprise: electrohydraulic servo valve, high-speed electromagnetic valve, electromagnetic valve driving signal setting and LVDT simulation setting, pressure signal, temperature signal, rotation speed signal, flow signal, LVDT/RVDT feedback signal acquisition, etc. The signal correspondence realized by the NI-PXI industrial personal computer and the signal conditioning device is shown in Table 2.
TABLE 1 lower computer parts list
Table 2 hardware signal configuration correspondence table
2.1.3 temperature Signal acquisition
The temperature signal of the tester is collected in two modes, one is that the temperature signal is obtained by converting an industrial personal computer at the test site to obtain (0-5) V voltage signals, and the other is that the temperature signal is directly read from a temperature sensor to obtain sensor output signals. The voltage acquisition board is used for signal acquisition, the signal acquisition precision of the board is +/-0.04%, and the requirements of +/-0.1% of temperature acquisition precision are met; the latter is carried out signal acquisition by temperature acquisition card, and board card signal acquisition precision is ± 0.1%, satisfies temperature acquisition precision requirement. Fig. 3 and 4 show schematic block diagrams of temperature signal acquisition.
2.1.4 speed and flow Signal acquisition
The rotation speed sensor signal and the flow sensor signal are frequency quantity signals. The field control cabinet is internally provided with a signal amplifying module, after the frequency signal output by the sensor is processed by the module, single-side rectangular waves with the same frequency, the low level of which is less than 1VDC and the high level of which is 24V are output, one path is used for PLC acquisition, and the other path is converted into a pulse signal with the same frequency and the amplitude of which is 5V after being isolated by an optical coupler and is used for NI board card acquisition. The functional block diagram is shown in fig. 5, the signal processing of the test equipment is carried out in the red frame, and the frequency acquisition precision is better than +/-1 Hz.
2.1.5 pressure Signal acquisition
The pressure sensors on the test pipeline are all 24VDC powered, output (4-20) mA current signals, output 0-5V voltage signals after being subjected to in-field operational amplification treatment, and the voltage acquisition board card acquires the voltage signals, wherein the acquisition precision is +/-0.1% in the range of 0-10V. The functional block diagram is shown in fig. 6.
2.2 software design
2.2.1 software architecture
The upper computer software provides a human-computer interface, user management and various configuration functions, receives data uploaded by the lower computer and controls the lower computer to operate. The upper computer software architecture is shown in fig. 7.
The upper computer software is divided into two threads: a main thread and a data communication thread. The main thread finishes the functions of loading, calibrating, testing, debugging and the like, and the data communication thread finishes the functions of receiving the data of the lower computer, distributing the data, receiving the instructions of the main thread, sending the instructions to the lower computer and the like. And the main thread and the data communication thread perform data communication through a data queue and an instruction queue.
The main thread adopts an event structure and a structure of a state machine. The main thread operation is divided into a plurality of states: initialization state, loading state, calibration state, test state, exit state, etc. After the initialization state is completed, the main thread is in a default state, and the user operates on the GUI to generate a transition of the event-triggered state, so that the main thread runs other states.
The data communication thread adopts the structure of a state machine. The data communication thread is divided into a plurality of states: an initialization state, a default state, a received data state, a transmitted data state, an exit state. After the initialization state is completed, the data communication thread is in a default state, and the states of receiving data and sending data are triggered by timing and according to the state of the data queue, so that the data communication thread runs other states.
2.2.2 Login interfaces
After the software is opened, the user firstly enters a login interface, the schematic diagram of the login interface is shown in fig. 8, a user name and a password are filled in, after the user name and the password are filled in correctly, the user can enter the next interface by clicking a login button, and the user can exit the software by clicking an exit button.
2.2.3 function selection interface
The function selection interface schematic diagram is shown in fig. 9, and is mainly divided into five functions of configuration, engineering, test, debugging and user management, wherein different types of users have different authorities, and corresponding functions without authorities are displayed in gray.
2.2.4 System configuration software design
The corresponding channel configuration and other configuration of the acquisition states of the acquisition circuit of the lower computer are needed before data acquisition, but the system configuration is very difficult due to the fact that the number of channels of the system is large and the variety of the acquired signal types of each channel is high. The system is often used for collecting large data volume, so that the lower computer must ensure the accuracy of each configuration function before collecting. In order to solve the problem, the configuration module of the system provides a self-checking function, namely, after the user configures the functions of each channel, the system encodes configuration data according to a self-defined transmission format, then downloads the configuration data to a lower computer through a selected communication mode, and after receiving the configuration data, the lower computer decodes the configuration data according to a protocol format and performs corresponding circuit conversion.
After the conversion is completed, the configuration state of each channel is reorganized into frames and uploaded to the upper computer, and the upper computer displays the configuration state of each channel to a user in a window mode through analysis again. Therefore, the purpose of grasping the configuration state of the lower computer in real time is achieved, and the accuracy of data acquisition of the lower computer each time is ensured. In order to ensure the accuracy of channel configuration and state return information receiving of the lower computer in the configuration process, in the configuration information issuing process, the lower computer sequentially receives the configuration information of each channel according to the front-to-back sequence, then carries out circuit conversion and configuration of the corresponding channel, and finally returns the configuration state of the channel to the upper computer. The circulating interaction with the upper computer completes the configuration of the channel and the receiving of the return information.
In order to meet the working time sequence of the lower computer, the upper computer software adopts a multithreading and shift register mode to complete the work. Firstly, the configuration information of each channel is arranged into an array form according to a frame format and is transmitted to a configuration information issuing state through a queue, the configuration information of a first channel is issued in sequence in the state, then the state of a state machine is converted into a receiving state, and in the state, a cyclic structure and a shift register structure are adopted by the system for completing reading of state return information. After the complete data of one frame is read, the complete data of the frame is analyzed, the analysis result is stored in an array, and then the configuration of the next channel is carried out under the configuration issuing state, so that the issuing of the configuration information and the reading of the state can be completed under the condition that the state of a state machine is continuously switched. In addition, in order to ensure the high efficiency and stability of the system, the module can add one by using a counter when the module does not receive complete state information after a certain time delay, namely, the error state is recorded once, and when the configuration of one channel has more than 3 error states, the system is unstable, so that the configuration is stopped and a popup window prompts that the system has faults. The overall configuration information issuing and status reading procedure is shown in fig. 10 and 11.
2.2.5 configurable function programming
The board card configuration program is shown in fig. 12, and is mainly used for completing the configuration of each acquisition channel of the lower computer, and mainly comprises the setting of parameters such as sensor type, excitation source, sampling rate, zero point, sensitivity and the like. The operations of opening the file, saving the file and the like are also arranged under the menu bar file, so that the repeated configuration information can be conveniently utilized and modified by a user. And when the configuration interface is opened each time, the system automatically reads the last configuration information to the configuration interface. In addition, the drop-down list selected by the sensor on the interface can realize the simultaneous configuration of the acquisition states of a plurality of channels, namely, when a plurality of channels are to be tested by one sensor, the drop-down list can be configured at one time, and the above operations are designed for ensuring the convenience of the system.
Most of the operation modes of the configuration interface of the module are to set the numerical values in the list, so that in order to accord with the operation habit of a user, the configuration interface of the system can write and clear the numerical values like Excel software used at ordinary times, and the configuration interface is completed by adopting the programming of the following processes. Fig. 13 is a flow chart of a double click event when a value setting is performed in response to the front panel.
As shown in fig. 13, when the interface is double-clicked, the cell information is acquired through the "click to rank" attribute of the multi-rank list, then the condition attribute in the boundary is judged, and if the condition is that the condition is in the boundary, the acquired cell position information is transmitted to the double-click processing module through the queue.
The core program of the double click processing module is shown in fig. 14. And after receiving the information of the cell, assigning corresponding attribute values to the input control through the active cell, the cell position, the cell size and the item name, and displaying the input control at the double-click position. And then, setting the numerical value, wherein after the setting is finished, the input control can add the setting value into the selected cell only by clicking other positions of the interface, and the input control can be automatically hidden, so that the function of interface data configuration is finished.
2.2.6 step addition and subtraction program
Step size addition and subtraction program as shown in fig. 15, if a red triangle icon on the right side of a given frame is clicked with a mouse after a given step size is set, given numbers in the given frame are increased by a set step size value, the number 1 times of mouse clicking is increased by 1 time, and the mouse is immediately effective; similarly, when clicking the red triangle icon on the left side of the given frame by using the mouse, the given number in the given frame is reduced according to the set step value, and the number 1 times of clicking the mouse is reduced by 1 time and takes effect immediately; when the required step value is input in a given step setting frame, setting the step to be effective if and only after the enter key of the upper computer keyboard is pressed for confirmation; when a specific number is directly input in a given frame and the enter key of the upper computer keyboard is pressed, the input number is the current given.
2.2.7 data display interface
The data display interface is shown in fig. 16, and is composed of interfaces such as data storage, waveform diagram display, signal calibration table and the like. The user can store data according to the need, perform custom setting on the colors, widths, lines and the like of the curves displayed on the waveform chart, and complete formula calibration of different acquisition channels through the signal calibration table.
2.2.8 software Modular design
In the software design process, software programming is carried out in a mode of a subprogram and a main program, the subprogram mainly comprises a board card configuration subprogram, a data storage subprogram, a filtering subprogram and the like, and the subprograms are packaged and packaged into independent modules, so that the subprograms can be reused under different application scenes.
2.2.9 operation interface
FIG. 17 shows an upper computer operation interface.
While the invention has been described above with reference to the accompanying drawings, it will be apparent that the invention is not limited to the above embodiments, but is capable of being modified or applied directly to other applications without modification, as long as various insubstantial modifications of the method concept and technical solution of the invention are adopted, all within the scope of the invention.
Claims (10)
1. The utility model provides an aircraft engine fuel control annex test data acquisition system, its characterized in that, includes host computer and lower computer, the host computer in set up on-board controller, data communication module and collection module, on-board controller link to each other with collection module, collection module is connected with data communication module, the lower computer pass through signal conditioning circuit and be connected with data communication module, the lower computer is with rotational speed, flow, temperature, the pressure sensor data on the aircraft engine fuel control annex behind signal conditioning circuit processing, pass through data communication module transmission to collection module, collection module is with rotational speed, flow, temperature, the pressure data transmission to on-board controller on the aircraft engine fuel control annex.
2. The aircraft engine fuel control accessory test data acquisition system of claim 1, wherein the acquisition module comprises a rotation speed acquisition board, a flow acquisition board, a temperature acquisition board and a pressure acquisition board, the onboard controller is connected with the rotation speed acquisition board, the flow acquisition board, the temperature acquisition board and the pressure acquisition board, and the rotation speed acquisition board, the flow acquisition board, the temperature acquisition board and the pressure acquisition board are all connected with the data communication module.
3. The system for collecting test data of fuel control accessories of an aeroengine according to claim 1, wherein the lower computer collects data of rotation speed, flow, temperature and pressure sensors, and transmits the data to the upper computer for analysis in a communication mode of Ethernet.
4. The aircraft engine fuel control accessory test data acquisition system according to claim 1, wherein the signal conditioning circuit comprises an analog-to-digital conversion circuit, a filter circuit and a storage circuit which are sequentially connected.
5. The test data acquisition system of the fuel control accessory of the aeroengine according to claim 3, wherein the acquisition module is used for realizing the simultaneous acquisition of four physical quantities of voltage, temperature, rotating speed and flow, and the circuit type of each acquisition channel is freely switched through an upper computer so as to ensure that each channel can realize the acquisition of various physical quantities.
6. The test data acquisition system for the fuel control accessory of the aeroengine according to claim 2, wherein during temperature acquisition, temperature sensor data on the fuel control accessory of the aeroengine are acquired through a temperature acquisition card and transmitted to an upper computer; or a temperature sensor on the fuel control accessory of the aeroengine converts a temperature signal into a thermal resistance signal, the thermal resistance signal is transmitted to a voltage acquisition card through a conditioning circuit and a PLC cabinet, and the voltage signal is converted into a temperature signal through an upper computer;
when the rotating speed and the flow are collected, the rotating speed and the flow are output into single-side rectangular waves with the same frequency, the low level of which is smaller than 1VDC and the high level of which is 24V through a signal amplification module in the PLC cabinet; one path is used for PLC acquisition, and the other path is converted into pulse signals with the same frequency and 5V amplitude after being isolated by an optical coupler, so as to be used for frequency card acquisition and flow acquisition cards;
when the pressure signal is acquired, the pressure sensor data on the fuel control accessory of the aeroengine is acquired through the pressure acquisition card, and after the pressure sensor data are processed by the signal conditioning circuit, a voltage signal of 0-5V is output to the pressure acquisition card.
7. The aircraft engine fuel control accessory test data acquisition system according to claim 3, wherein the on-board controller is internally provided with:
the configuration module is used for completing the configuration of each data acquisition channel of the lower computer, and comprises the setting and display configuration of sensor types, excitation sources, sampling rates, zero points and sensitivity parameters;
and (3) an engineering module: the method is used for calibrating the data loading and name mapping loading processes;
and a testing module: the system comprises a pressure sensor, a temperature sensor, a flow sensor, a control module and a control module, wherein the pressure sensor is used for detecting the pressure, the temperature, the flow and the rotating speed of the pressure sensor;
and a debugging module: the system is used for displaying, storing and communicating data;
and a user management module: for adding and deleting users, modifying user categories, and modifying passwords.
8. The aircraft engine fuel control accessory test data collection system of claim 7, wherein the configuration module, engineering module, test module, and user management module are two threads: a main thread and a data communication thread; the main thread completes the functions of configuration, loading, calibration, testing, debugging and acquisition, and the data communication thread completes the functions of receiving the data of the lower computer, distributing the data, receiving the instructions of the main thread and sending the instructions to the lower computer; the main thread and the data communication thread communicate data through a data queue and an instruction queue;
the main thread adopts an event structure and a state machine structure; the main thread operation is divided into a plurality of states: initializing state, loading state, calibration state, testing state and exiting state; after the initialization state is completed, the main thread is in a default state, and a user operates on the GUI to generate event-triggered state conversion, so that the main thread operates other states;
the data communication thread adopts the structure of a state machine, and is divided into a plurality of states: initialization state, default state, received data state, sent data state, exit state; after the initialization state is completed, the data communication thread is in a default state, and the states of receiving data and sending data are triggered by timing and according to the state of the data queue, so that the data communication thread runs other states.
9. The aircraft engine fuel control accessory test data acquisition system according to claim 7, wherein the onboard controller further comprises a function selection interface module for performing corresponding operations and displays for five function modules for configuration, engineering, testing, debugging and user management.
10. The system for collecting test data of fuel control accessories of an aeroengine according to claim 7, wherein the configuration module is provided with a self-checking module, and the self-checking module has the functions of: after the user configures the functions of each channel, the system encodes the configuration data according to a self-defined transmission format, then downloads the configuration data to a lower computer in a selected communication mode, and after receiving the configuration data, the lower computer decodes the configuration data according to a protocol format and performs corresponding circuit conversion;
after the conversion is completed, the configuration state of each channel is framed again and uploaded to the upper computer, and the upper computer displays the configuration state of each channel to a user in a window mode through analysis again; thus, the purpose of grasping the configuration state of the lower computer in real time is achieved, and the accuracy of data acquisition of the lower computer each time is ensured;
in order to ensure the accuracy of channel configuration and state return information receiving of the lower computer in the configuration process, in the configuration information issuing process, the lower computer sequentially receives the configuration information of each channel according to the front-to-back sequence, then carries out circuit conversion and configuration of the corresponding channel, and finally returns the configuration state of the channel to the upper computer; the circulating interaction with the upper computer completes the configuration of the channel and the receiving of the return information.
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