CN118329452A

CN118329452A - Performance self-testing system and method of engine testing equipment

Info

Publication number: CN118329452A
Application number: CN202410449935.1A
Authority: CN
Inventors: 张萌; 高强; 霍涛; 滕科嘉; 罗舜天; 白金; 寇升; 李宇; 王柯婷
Original assignee: Xian Aerospace Propulsion Testing Technique Institute
Current assignee: Xian Aerospace Propulsion Testing Technique Institute
Priority date: 2024-04-15
Filing date: 2024-04-15
Publication date: 2024-07-12

Abstract

The invention provides a performance self-testing system and a method of engine testing equipment, belonging to the technical field of equipment detection, wherein the system comprises: the embedded integrated machine is used for calling a plurality of historical signals of the engine; the analog quantity output card is provided with a plurality of input channels and a plurality of output channels; the embedded integrated machine inputs the converted digital signals into an analog output card, the analog output card converts the received digital signals into analog signals, and the analog signals are input into engine test equipment; the engine test equipment analyzes the received plurality of analog signals to obtain analyzed digital signals, compares the analyzed digital signals with digital signals converted by the embedded integrated machine, and if the comparison results of the signals are consistent, the performance of the engine test equipment meets the requirements. The system uses real data to load, completely simulates the output signal of the sensor in the experimental process, has high self-test efficiency, and greatly improves the self-test precision and accuracy.

Description

Performance self-testing system and method of engine testing equipment

Technical Field

The invention belongs to the technical field of equipment detection, and particularly relates to a performance self-testing system and method of engine testing equipment.

Background

The engine is an energy conversion device, the structure and the control process of the energy conversion device are complex, and in order to ensure the use safety and stability, the performance of the engine is generally tested by engine performance testing equipment before the engine is used. The engine performance test equipment is a gradual change parameter measurement equipment and is used for realizing the detection of the engine performance by measuring gradual change signals such as pressure, temperature, rotating speed and the like of the engine. Sensor signals on the engine enter engine performance testing equipment through a cable network and a signal conditioner.

In using engine performance testing equipment, testing and verification of its own detection performance are required. The system state verification method of the existing engine performance test equipment (engine test equipment and cable system) is to load a fixed voltage value through a high-precision standard voltage source, observe whether the acquisition data of an acquisition system are correct, and if the acquisition state is correct, explain that the system states of the engine test equipment, cable connection and the like are normal. The existing test equipment mainly has the following defects:

For example, the existing key parameter pressure sensor and pressure converter are voltage signals, and the verification means is to use a high-precision program-controlled direct current voltage stabilizing source to carry out single-channel external electrical signals on the key parameter acquisition channels one by one. When an electric signal is externally applied, the voltage is divided into mV-level small signals and V-level large signals according to the output type of the sensor signal, and corresponding fixed voltage values are loaded for verification one by one. The conventional key parameters are that the rotating signals are frequency signals, and the verification means is that a high-precision frequency source is used for carrying out single-channel externally-added frequency signals with fixed frequency and fixed amplitude one by one. The verification method consumes a great deal of labor cost and time cost, is externally added with fixed standard signals, cannot truly simulate the sensor output signals in the test process, and has the condition of insufficient verification.

Therefore, the existing test equipment test method can only load voltage values through a high-precision standard voltage source and a single channel, cannot load multiple channels, can only load fixed voltage values, cannot simulate voltage signals of an engine sensor, and has the problems of incomplete inspection and test and low detection precision.

Disclosure of Invention

The invention provides a performance self-testing system and method of engine testing equipment, which are used for solving the problems that the existing testing method of the testing equipment can only load voltage values through a high-precision standard voltage source and a single channel, cannot load multiple channels, and can only load fixed voltage values, cannot simulate voltage signals of an engine sensor and is incomplete in inspection and test.

In order to achieve the above object, the present invention provides the following technical solutions:

A performance self-test system for an engine test apparatus, comprising:

The embedded integrated machine is used for calling a plurality of history signals of the engine, wherein the history signals comprise pressure sensor signals stored in an xml format, converter signals stored in a dat format and rotation speed sensor signals stored in a csv file format; the embedded integrated machine is also used for converting a plurality of historical signals into digital signals;

The analog output card is provided with a plurality of input channels and a plurality of output channels, and is connected with the embedded integrated machine and the engine test equipment in a bidirectional manner;

The embedded integrated machine inputs the converted digital signals into the analog output card, the analog output card receives the digital signals through a plurality of input channels and converts the received digital signals into analog signals, and the analog signals are input into the engine test equipment through a plurality of output channels; the engine test equipment analyzes the received plurality of analog signals to obtain analyzed digital signals, compares the analyzed digital signals with the digital signals converted by the embedded integrated machine, and if the comparison results of the signal sizes are consistent, the performance of the engine test equipment meets the requirements.

Preferably, the digital signal converted by the embedded integrated machine includes:

the first pressure signal is a direct current voltage signal with the mV level, and the voltage range of the first pressure signal is-1 mV to 15mV;

the second pressure signal is a V-level direct current voltage signal, and the voltage range of the second pressure signal is 0.2V-5V;

The rotating speed signal is a V-level alternating current voltage signal, and the magnitude of the rotating speed signal is +/-10V;

the converted parameter rate is: the first pressure signal and the second pressure signal are 100 points/second, and the rotating speed signal is 100k points/second.

Preferably, the plurality of historical signals of the engine are directly retrieved from an engine parameter library.

Preferably, the embedded integrated machine further comprises a display module and an operation module, wherein the display module is used for displaying the digital signals and log records converted by the embedded integrated machine.

Preferably, the power supply system further comprises a power supply module, wherein the power supply module comprises a battery system and a direct current power supply, the input end of the direct current power supply is connected with the battery system, and the output end of the direct current power supply is connected with the analog output card.

Preferably, the embedded integrated machine, the analog output card and the engine test equipment are connected through cables.

Another object of the present invention is to provide a performance self-testing method of an engine testing apparatus, comprising the steps of:

Retrieving a plurality of historical signals of the engine, the historical signals including pressure sensor signals stored in a.xml format, transducer signals stored in a.dat format, and rotational speed sensor signals stored in a csv file format;

converting the plurality of history signals into digital signals;

converting the plurality of digital signals into a plurality of analog signals, and simultaneously inputting the plurality of analog signals into an engine test device;

And analyzing the received plurality of analog signals through the engine test equipment to obtain analyzed digital signals, comparing the analyzed digital signals with the digital signals after the conversion of the historical signals, and if the comparison results of the signals are consistent, enabling the performance of the engine test equipment to meet the requirements.

Preferably, the comparing the digital signal after the analysis with the digital signal after the conversion of the history signal, if the comparison result of the signal size is consistent, the performance of the engine test device meets the requirement, specifically including:

The digital signal converted by the pressure sensor signal or the converter signal is a voltage signal V1, the signal analyzed by the engine test equipment is a voltage signal V2, and the voltage signal V1 and the voltage signal V2 have a multiple relation: v2=v1×gain, where Gain is the magnification; when V1 is equal to V2, proving that the performance of the engine test equipment meets the requirement;

collected physical quantity=b (voltage signal-UO) +ph, wherein b is a verification slope set by the system, U0 is an initial zero position for butt joint, and PH is the actual measurement atmospheric pressure of the instrument; comparing the collected physical quantity with the historical physical quantity stored by the engine test equipment, wherein the comparison result is consistent, and the performance of the engine test equipment is proved to meet the requirement;

and comparing the digital signal obtained by analyzing the rotating speed signal by the engine test equipment with the historical signal stored by the engine test equipment, wherein the comparison result is consistent, and the performance of the engine test equipment is proved to meet the requirement.

The performance self-testing system and method of the engine testing equipment provided by the invention have the following beneficial effects:

According to the invention, a plurality of historical signals of the engine are taken, the plurality of historical signals are converted into digital signals through the embedded integrated machine, the inspection and the test are comprehensive, the real historical signal data of the engine are adopted, the output signals of the sensor in the experimental process are completely simulated, the real data are used for loading, the self-test precision is high, meanwhile, the data are converted and transmitted by adopting the multi-channel analog output card, the multi-channel loading voltage value is realized, and the self-test efficiency is greatly improved.

Drawings

In order to more clearly illustrate the embodiments of the present invention and the design thereof, the drawings required for the embodiments will be briefly described below. The drawings in the following description are only some of the embodiments of the present invention and other drawings may be made by those skilled in the art without the exercise of inventive faculty.

Fig. 1 is a hardware constitution diagram of a performance self-test system of an engine test apparatus of embodiment 1 of the present invention.

FIG. 2 is a software interface of a performance self-test system of the engine test apparatus of embodiment 1 of the present invention;

FIG. 3 is a self-test flow chart of the performance self-test system of the engine test equipment of embodiment 1 of the present invention;

FIG. 4 is a data loading flow chart of the performance self-test system of the engine test equipment of the embodiment 1 of the present invention;

Fig. 5 is a data simulation output flow chart of the performance self-test system of the engine test apparatus of embodiment 1 of the present invention.

Detailed Description

The present invention will be described in detail below with reference to the drawings and the embodiments, so that those skilled in the art can better understand the technical scheme of the present invention and can implement the same. The following examples are only for more clearly illustrating the technical aspects of the present invention, and are not intended to limit the scope of the present invention.

In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the technical solutions of the present invention and to simplify the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present invention.

Furthermore, the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. In the description of the present invention, it should be noted that, unless explicitly specified or limited otherwise, the terms "connected," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; may be directly connected or indirectly connected through an intermediate medium. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances. In the description of the present invention, unless otherwise indicated, the meaning of "a plurality" is two or more, and will not be described in detail herein.

Example 1

The invention provides a performance self-testing system of engine testing equipment, which realizes a sensor signal simulation function, a rapid verification function of the engine testing equipment, and a real-time monitoring function of a reading/editing/previewing function of a sensor data file, an electric signal output function (pressure sensor signal simulation, converter signal simulation, rotation speed sensor signal simulation) and a playback state, so that an automatic checking test of an acquisition channel of the engine testing equipment is realized.

Specifically, as shown in fig. 1, the system further comprises an embedded integrated machine, an analog output card, a display module, an operation module and a power supply module on the basis of the existing engine test equipment, wherein the engine test equipment is the tested equipment in fig. 1. The embedded integrated machine, the analog output card, the power supply module and the tested equipment are arranged inside the equipment case, and the display module and the operation module are arranged on the equipment case.

The embedded integrated machine is used for calling a plurality of historical signals of the engine, wherein the historical signals comprise pressure sensor signals stored in an xml format, converter signals stored in a dat format and rotating speed sensor signals stored in a csv file format; the embedded integrated machine is also used for converting a plurality of historical signals into digital signals;

The analog output card is provided with a plurality of input channels and a plurality of output channels, and is connected with the embedded integrated machine and the engine test equipment in a bidirectional manner.

The embedded integrated machine inputs the converted digital signals into an analog output card, the analog output card receives the digital signals through a plurality of input channels and converts the received digital signals into analog signals, and the analog signals are input into engine test equipment through a plurality of output channels; the engine test equipment analyzes the received plurality of analog signals to obtain analyzed digital signals, compares the analyzed digital signals with digital signals converted by the embedded integrated machine, and if the comparison results of the signals are consistent, the performance of the engine test equipment meets the requirements.

Specifically, the embedded integrated machine, the analog output card and the engine test equipment are connected through cables, wherein the power supply module comprises a battery system and a direct current power supply, the input end of the direct current power supply is connected with the battery system, and the output end of the direct current power supply is connected with the analog output card. The capacity of the battery system is 10Ah, the battery system can work offline for 4-5 hours after full charge, the residual electric quantity can be checked in real time and charged when the battery system is provided with electric quantity display, and the output voltage of the direct current power supply is DC24V.

The resolution of the analog output card is 16 bits, the output channel is 32 paths, and a digital-to-analog conversion module in the analog output card has a digital-to-analog conversion function, so that conversion of pressure sensor signals (-10- +30mV), converter signals (-1- +6V), rotation speed sensor signals (-10- +10V) and the like is realized.

The equipment cabinet of the performance self-testing system of the engine testing equipment adopts an integrated portable design, is convenient to use at a plurality of test stations, is provided with an electric quantity indication switch, an alternating current power supply switch, a box switch and a USB structure on a front panel, is convenient to operate by a USB connectable keyboard and a mouse, and is provided with a charging interface, a testing interface, a communication interface and a grounding column on a rear panel of the equipment cabinet. The charging interface is 220V alternating current power supply input and is used for charging the performance self-testing equipment of the engine testing equipment; the test interface can output analog signals of the related sensors to the outside; the communication interface is used as a network port and is used for being connected with an external computer and the like to finish importing and exporting data; the grounding column is used for grounding the performance self-testing equipment of the engine testing equipment.

An industrial 12.1 inch liquid crystal display screen is arranged on the equipment case, the operation of a touch screen and a keyboard and a mouse is supported, and the portable interface design comprises 2 USB interfaces and 1 network port, so that the portable interface is convenient to communicate with other equipment to import and export data. The liquid crystal display screen displays the test interface in real time, can perform test operation, and can display the electric quantity in real time at the same time, so as to prevent the shortage of the electric quantity by timely charging;

the software interface of the system is shown in fig. 2, and the main interface comprises real-time output data display, waveform curve after loading display and log record. The channel names and the display colors of all channels can be flexibly configured, can be stored, and are not required to be repeatedly configured when being used next time.

And (3) data display: the data display adopts two modes, namely curve display, firstly, after software is started and data loading is completed, the curve is used for intuitively displaying all curves of the data, different channels are displayed with different colors, any period data of the loaded data can be checked through dragging of a cursor on the curve, and the other display mode is text display, and meanwhile, the curve cursor displays an output position in real time in an output process, and the text displays an output data value.

And (3) output start-stop control: after the data loading is completed and the output is started, the output can be suspended or continued at any time.

Fixed value output function: before the equipment is formally used, the output state of the equipment can be checked by a method of continuously outputting a fixed value, and each analog channel can be independently set by the output fixed value.

The self-test flow of the performance self-test system of the engine test equipment comprises the following steps: 3 parts of system self-checking, data loading and data simulation output.

The system self-checking flow chart is shown in fig. 3: after the software is started, firstly connecting the analog output board card, if the connection fails, popping up a dialog box prompt, and if the self-checking result of the system is normal, ending the self-checking link.

The data loading flow chart is shown in fig. 4, after the system is started, the data path is loaded first, then the data is read, and after the data is read, the data is issued to the board card to prepare for output.

The data simulation output flow chart is shown in fig. 5, after the data loading is completed, the output is started, and the current output value of each channel and the curve output position are displayed on the interface in real time.

Based on the performance self-testing system of the engine testing equipment, the invention also provides a performance self-testing method of the engine testing equipment, which comprises the following testing steps:

step 1, connecting a test line: the embedded integrated machine, the analog output card, the power supply module and other components inside the equipment cabinet are connected through cables.

Step 2, system starting and self-checking: and after the system is connected correctly, starting the performance self-testing equipment of the engine testing equipment, checking the residual electric quantity, and performing system self-test.

Step 3, system configuration and data loading: after the system self-checking is normal, carrying out system configuration, including parameter channel configuration, color selection and the like. And loading a data path, reading data, and issuing the data to the board card after the data is read.

Step 4, data simulation output: after the data loading is completed, the output is started.

Step 5, self-test: the method specifically comprises the following steps:

Step 51, retrieving, by the embedded integrated machine, a plurality of historical signals of the engine, the historical signals including pressure sensor signals stored in an. Xml format, transducer signals stored in an. Dat format, and rotational speed sensor signals stored in a. Csv file format.

Step 52, the embedded integrated machine is further configured to convert the plurality of history signals into digital signals, and input the converted plurality of digital signals into the analog output card.

Step 53, the analog output card receives a plurality of digital signals through a plurality of input channels, and converts the received plurality of digital signals into a plurality of analog signals, and the plurality of analog signals are input into the engine test device through a plurality of output channels.

And 54, the engine test equipment analyzes the received plurality of analog signals to obtain analyzed digital signals, compares the analyzed digital signals with the digital signals converted by the embedded integrated machine, and if the comparison results of the signal sizes are consistent, the performance of the engine test equipment meets the requirements.

Specifically, it is judged whether the performance of the engine test equipment satisfies the requirement or not is divided into 3 parts:

1) Acquisition and acquisition of original electric quantity correctness verification (only pressure sensor signal or transducer signal)

The playback voltage of the performance self-testing system, that is, the original voltage signal (V1, unit mV) obtained by data conversion in step 52 and the voltage signal (V2, unit mV) obtained by the engine testing device are in a multiple relationship, and the multiple is the amplification factor Gain set in the engine testing device, that is:

V2＝V1*Gain

the two signals are consistent, and the fact that the analysis voltage value of the playback data is correct is indicated, the voltage value acquired by the engine test equipment is correct, and the state of the whole cable connection and acquisition system of the system to be tested is correct.

2) The correctness of the physical quantity obtained by acquisition (aiming at the pressure sensor signal or the converter signal only)

The physical quantity played back by the performance self-testing system is the physical quantity corresponding to the test run data, and can be obtained by inquiring the historical data stored by the corresponding engine testing equipment. For example, for a pressure sensor, a physical quantity refers to converting the pressure value of the pressure sensor into an actual pressure value.

The collected physical quantity=b (the collected voltage signal-UO) +ph (b: the system set calibration slope, U0: the initial zero position of the butt joint, PH: the measured atmospheric pressure of the instrument).

The two comparison results are consistent, which shows that the checking slope is correct.

3) Verification of correctness of rotation speed sensor signal (rotation speed sensor signal only)

After the steps of filtering, amplifying, shaping, frequency acquisition and the like, the engine test equipment obtains the frequency of 100k point/second alternating current data and converts the frequency into a rotating speed value, and the corresponding 100 point/second physical quantity can be obtained by inquiring the historical data stored by the corresponding engine test equipment.

The two signals are consistent, so that the whole cable connection and acquisition system state of the system to be tested is correct.

Step 6, post-test treatment: after the test is finished, the software is exited, the residual electric quantity is checked, the system is closed, and the performance self-testing equipment of the engine test equipment is charged if necessary, so that the next playback verification is facilitated.

Recording a target: the voltage value collected by the engine test equipment is consistent with the voltage value (to be multiplied by the gain) played back by the performance self-testing equipment of the engine test equipment. The physical magnitude converted by the engine test equipment is consistent with the physical magnitude of the data file of the self-test loading of the performance of the engine test equipment. If the signals are consistent, the configuration of the board card, the filtering, the gain, the coefficient and the like of the engine test equipment is correct, and the cable system is connected without errors and in a correct state.

According to the invention, a plurality of historical signals of the engine are taken, the plurality of historical signals are converted into digital signals through the embedded integrated machine, the inspection and the test are comprehensive, the real historical signal data of the engine are adopted, the output signals of the sensor in the experimental process are completely simulated, the real data are used for loading, the self-test precision is high, meanwhile, the data are converted and transmitted by adopting the multi-channel analog output card, the multi-channel loading voltage value is realized, and the self-test efficiency is greatly improved. The invention effectively solves the insufficient problem of the key parameter test, simultaneously saves labor cost and time cost, and provides effective technical support for the key parameter test.

It will be appreciated by those skilled in the art that embodiments of the present invention may be provided as a method, system, or computer program product. Accordingly, the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present invention may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.

The present invention is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems) and computer program products according to embodiments of the invention. It will be understood that each flow and/or block of the flowchart illustrations and/or block diagrams, and combinations of flows and/or blocks in the flowchart illustrations and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.

These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.

These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.

It should be noted that the above-described embodiments will enable those skilled in the art to more fully understand the invention, but do not limit it in any way. Thus, although the present invention has been described in detail with reference to the present specification and examples, it should be understood by those skilled in the art that the present invention may be modified or equivalents; all technical schemes and improvements which do not depart from the spirit and scope of the invention are covered by the protection scope of the invention. Any reference sign in a claim should not be construed as limiting the claim concerned. Any simple modification or equivalent substitution of the technical solutions that can be obviously obtained by those skilled in the art within the technical scope of the present disclosure fall within the protection scope of the present invention.

Claims

1. A performance self-test system for an engine test apparatus, comprising:

2. The system for self-testing the performance of an engine test device according to claim 1, wherein the digital signal converted by the embedded integrated machine comprises:

3. The system of claim 2, wherein the plurality of historical signals of the engine are retrieved directly from an engine parameter library.

4. The system of claim 1, further comprising a display module and an operation module, wherein the display module is configured to display the converted digital signal and log record of the embedded integrated machine.

5. The system for self-testing the performance of engine test equipment according to claim 1, further comprising a power supply module, wherein the power supply module comprises a battery system and a direct current power supply, an input end of the direct current power supply is connected with the battery system, and an output end of the direct current power supply is connected with the analog output card.

6. The system for self-testing the performance of an engine test device according to claim 1, wherein the embedded integrated machine, the analog output card and the engine test device are connected by a cable.

7. A method for self-testing the performance of an engine test apparatus, comprising the steps of:

converting the plurality of history signals into digital signals;

8. The method for self-testing the performance of the engine test equipment according to claim 7, wherein the comparing the parsed digital signal with the digital signal after the history signal is converted, and if the comparison result of the signal size is consistent, the performance of the engine test equipment meets the requirement, specifically comprising: