Engine thrust test response time in-situ measurement method and device

Abstract

The invention aims to realize in-situ measurement of engine thrust test response time, and particularly provides an engine thrust test response time in-situ measurement device, which comprises a test bench provided with a bearing pier connected to an engine bench and a test sensor connected to the bearing pier; the verification test system is provided with a pulse force generating device for generating pulse force to the test sensor, a pulse force controller for controlling the pulse force generating device, a high-speed camera for shooting the contact surface part of the pulse force generating device and the test sensor, and a data collector; and the data analysis system is connected with the data acquisition unit and the high-speed camera, and is used for at least receiving a thrust signal generated by the test sensor due to deformation from the data acquisition unit, receiving image data of deformation of the contact surface part from the high-speed camera, and at least performing time sequence synchronization on the thrust signal and the deformation process. The invention further provides a corresponding engine thrust test response time in-situ measurement method.

Description

Technical Field

[0001] The invention belongs to the technical field of engine experiment and testing, and relates to an in-situ measurement method and device for engine thrust test response time. Background Art

[0002] The engine is the heart of aerospace vehicles and is technically complex. Various engine test technologies are important means of evaluating engines. They can detect potential defects of engines in a timely manner and are extremely important for engine quality assurance, safety verification, and performance evaluation.

[0003] Thrust test is an important part of engine test technology. Through thrust test, the performance of the engine under different working conditions can be determined to ensure safety and stability under extreme conditions. Thrust response time refers to the time required from issuing a command to change the engine thrust to the engine actually reaching the corresponding thrust state. It plays an important role in the rapid change of thrust in an emergency situation and is extremely important for the safe operation of spacecraft. Therefore, it is an important part of engine thrust test.

[0004] Existing thrust response time test methods include impulse response method, step response method, etc. For example, the test process of the impulse response method is: first connect the sensor to the shock tube, use the bursting diaphragm generator to generate a step pressure signal, use the transient recording instrument to record the response waveform of the sensor, and the time it takes for the sensor output value to rise from 10% of the stable value to 90% of the stable value is the response time.

[0005] However, these existing thrust response time test methods all require the use of special devices to perform measurements separately, which adds some unnecessary troubles. At present, there is no simple, direct and effective in-situ measurement device for engine thrust test response time in the art. Summary of the invention

[0006] The object of the present invention is to provide an in-situ measurement method and device for engine thrust test response time, which achieves in-situ measurement of engine thrust test response time by installing a pulse force generating device on an engine test bench to generate pulse force loading on the engine test bench, measuring the pulse force using an engine thrust sensor, and analyzing the pulse force generation control signal, the pulse force loading signal and the thrust sensor signal.

[0007] Specifically, the present invention provides an in-situ measurement device for engine thrust test response time, which is used to measure the inference test response time of an engine bench of an engine, and includes: a test bench, which has a load-bearing pier connected to the engine bench and a test sensor connected to the load-bearing pier; a verification test system, which has a pulse force generating device for generating a pulse force to the test sensor so that the test sensor is deformed, a pulse force controller for controlling the pulse force generating device, a high-speed camera for photographing the contact surface between the pulse force generating device and the test sensor, and a data collector respectively connected to the test sensor; a data analysis system, which is connected to the data collector and the high-speed camera, and is used to at least receive a thrust signal generated by the test sensor due to deformation from the data collector, receive image data of deformation of the contact surface from the high-speed camera, and at least synchronize the thrust signal and the deformation process in time sequence.

[0008] Furthermore, the in-situ measurement device for the engine thrust test response time of the present invention may also have such a technical feature, wherein the test bench also includes a sensor fixing platform, and the test sensor is connected to the load-bearing pier through the sensor fixing platform.

[0009] The in-situ measurement device for the engine thrust test response time of the present invention may also have such a technical feature, wherein the high-speed camera is also provided with an optical lens.

[0010] The in-situ measurement device for engine thrust test response time of the present invention may also have such a technical feature, wherein the test sensor is a pressure sensor.

[0011] The present invention also provides an in-situ measurement method for engine thrust test response time, which uses any of the above engine thrust test response time in-situ measurement devices to perform measurement, and comprises the following steps:

[0012] Step S1: using the data analysis system to send a start instruction to the high-speed camera to start shooting, and at the same time sending a test instruction to the pulse force controller;

[0013] Step S2: the pulse force controller sends control signals to the pulse force generating device and the data collector respectively according to the test instruction, so that the pulse force generating device generates the pulse force while the data collector collects the thrust signal generated by the test sensor;

[0014] Step S3: The data analysis system receives the thrust signal, pulse force feedback signal and image data from the data acquisition device and the high-speed camera, and determines the duration of the deformation process of the test sensor according to the image data;

[0015] Step S4: The data analysis system synchronizes the test signal, the thrust signal, the pulse force feedback signal of the pulse force controller and the deformation process in time sequence and represents them in a two-dimensional coordinate diagram.

[0016] In the above-mentioned in-situ measurement method of engine thrust test response time provided by the present invention, the data analysis system can also display the two-dimensional coordinate graph through a display.

[0017] In the above-mentioned in-situ measurement method of engine thrust test response time provided by the present invention, the data analysis system may also have a response time analysis module for automatically analyzing and judging the response time according to the two-dimensional coordinate data.

[0018] Functions and Effects of the Invention

[0019] In the present invention, since the test bench has a load-bearing pier connected to the engine bench, the test sensor is connected to the load-bearing pier, and the pulse force generating device can generate a pulse force on the test sensor, each test component is actually directly connected to the engine bench of the engine to be tested, which can save the steps of repeated disassembly and assembly of the device, and realize the in-situ measurement of the response time.

[0020] In addition, since the verification test system also has a high-speed camera for photographing the contact surface between the pulse force generating device and the test sensor, it can capture the deformation process of the test sensor, and it can also be synchronized with the thrust signal of the test sensor through the data analysis system. Therefore, through further data analysis, it is possible to obtain a time diagram from the issuance of the control signal to the generation of the thrust signal by the thrust sensor, and then obtain accurate response time data. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 Schematic diagram of an in-situ measurement device for engine thrust test response time in an embodiment;

[0022] Figure 2 is a flow chart of the measuring method of the present invention in the embodiment;

[0023] Figure 3 Graph showing the signal output by the data analysis system in the embodiment. DETAILED DESCRIPTION

[0024] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the following embodiments and the accompanying drawings specifically illustrate the in-situ measurement device and method for the engine thrust test response time of the present invention.

[0025] Figure 1 It is a schematic structural diagram of an in-situ measurement device for engine thrust test response time according to an embodiment of the present invention.

[0026] like Figure 1 As shown, the engine thrust test response time in-situ measurement device (hereinafter referred to as the measurement device) 100 of this embodiment is used to measure the thrust test response time of an engine bench 200 of an engine to be tested, and includes a test bench 1, a verification test system 2 and a data analysis system 3.

[0027] The test bench 1 includes a load-bearing pier 11 , a test sensor 12 , a sensor fixing platform 13 , and a data collector 14 .

[0028] The bearing pier 11 is connected to the engine pedestal 200. In this embodiment, the bearing pier 11 is installed on one end of the engine pedestal 200.

[0029] The sensor fixing platform 13 is fixedly installed on a side surface of the bearing pier 11 facing the engine stand 200 .

[0030] The test sensor 12 is fixed on the sensor fixing platform 13, and is connected to the bearing pier 11 through the sensor fixing platform 13. The test sensor 12 is also connected to the data collector 14 through an optical fiber, and can start or end signal collection under the control of the data collector 14. When squeezed during the signal collection process, it can stably generate a thrust signal and transmit the thrust signal to the data collector 14. In this embodiment, the test sensor 12 is a resistive pressure sensor.

[0031] The data collector 14 is connected to the data analysis system 3 and is used to collect thrust signal data through the test sensor 12 and transmit the thrust signal data to the data analysis system 3 .

[0032] The verification test system 2 includes a pulse force controller 21 , a pulse force generating device 22 , a pulse force generating device connecting member 23 , a high-speed camera 24 and an optical lens 25 .

[0033] The pulse force controller 21 is connected to the pulse force generating device 22 and the data collector 14 through optical fibers, and is used to send control signals to the pulse force generating device 22 and the data collector 14, so as to make the pulse force generating device 22 generate pulse force and at the same time make the data collector 14 start collecting signals. In this embodiment, the pulse force controller 21 is connected to the data analysis system 3, and sends control signals to the pulse force generating device 22 and the data collector 14 when receiving the test start signal from the data analysis system 3.

[0034] The pulse force generating device 22 is fixed to the surface of the test sensor 12 through the pulse force generating device connector 23, and generates a pulse force to the test sensor 12 under the control of the control signal of the pulse force controller 21, that is, generates a force to squeeze the test sensor 12 in a pulse manner, so that the test sensor 12 is deformed. In this embodiment, the pulse force generating device 22 includes a monostable trigger and a piezoelectric ceramic element. When the input control signal exceeds the threshold of the monostable trigger, the monostable trigger generates a pulse signal. This pulse signal is applied to the piezoelectric ceramic element, which can cause the piezoelectric ceramic element to instantly deform and form a pulse force.

[0035] The pulse force generating device connector 23 is used to connect the pulse force generating device 22 and the test sensor 12. In this embodiment, the shape of the pulse force generating device connector 23 can be adjusted according to the pulse force generating device 22 and the test sensor 12, as long as the pulse force generating device 22 can be fixedly installed and the piezoelectric ceramic element is in close contact with the force-bearing surface of the test sensor 12, so that the pulse force of the pulse force generating device 22 can directly act on the test sensor 12.

[0036] The high-speed camera 24 is arranged near the test sensor 12, and is located above the contact surface between the impulse force generating device 22 and the test sensor 12. The high-speed camera 24 has an optical lens 25 adapted for high-speed photography, and is used to photograph the contact surface between the impulse force generating device 22 and the test sensor 12. In this embodiment, the high-speed camera 24 performs high-speed continuous photography after being triggered. The high-speed camera 24 is also connected to the data analysis system 3, and the image data obtained by the continuous photography is synchronously transmitted to the data analysis system 3.

[0037] The data analysis system 3 of this embodiment is a computer having an image analysis module, which can identify the contact surface between the pulse force generating device 22 and the test sensor 12 from the image data by means of existing technologies such as image recognition, and judge whether the contact surface is deformed by image analysis, thereby judging the time when the test sensor 12 is deformed according to the time corresponding to the image frame in which the deformation occurs. In addition, the data analysis system 3 also has a human-computer interaction interface for allowing operators to input test instructions and view corresponding test results.

[0038] In this embodiment, after the components of the measuring device 100 are installed, the in-situ measurement of the engine thrust test response time can be performed.

[0039] Figure 2 It is a flow chart of an in-situ measurement method of an engine thrust test response time according to an embodiment of the present invention.

[0040] like Figure 2As shown, the in-situ measurement method of engine thrust test response time of this embodiment includes the following steps:

[0041] Step S1: The operator inputs a test start instruction through the data analysis system 3, and the data analysis system 3 sends a start instruction to the high-speed camera 24 to start shooting. The data analysis system 3 also sends a test instruction to the pulse force controller 21 according to the test start instruction.

[0042] Step S2: The pulse force controller 21 sends control signals to the pulse force generating device 22 and the data collector 14 respectively according to the test instructions, so that the pulse force generating device 22 generates pulse force while the data collector 14 starts collecting data; the control signal is also fed back to the data analysis system 3 at the same time.

[0043] After the pulse force is generated, the pulse force generating device 22 will form a pulse force feedback signal and transmit it to the data collector 14 for collection. At the same time, since the pulse force generating device 22 will squeeze the test sensor 12 at the moment of generating the pulse force, it will cause the force to deform and generate a thrust signal, and the thrust signal is also collected in real time by the data collector 14.

[0044] Step S3: the data analysis system 3 receives the thrust signal and pulse force feedback signal from the data collector 14 and the image data from the high-speed camera 24, and determines the duration of the entire deformation process of the test sensor 12 according to the received image data.

[0045] Step S4: The data analysis system 3 synchronizes the control signal fed back by the pulse force controller 21 and the received thrust signal, the pulse force feedback signal and the deformation process of the test sensor 12 in time sequence and represents them in a two-dimensional coordinate graph, and further displays the two-dimensional coordinate graph through a display, etc., so that the operator can view the two-dimensional coordinate graph and obtain the response time data, thereby analyzing and determining whether the response time meets expectations.

[0046] Figure 3 It is a schematic diagram of response time analysis and judgment according to an embodiment of the present invention.

[0047] like Figure 3 As shown, when the control signal, thrust signal, pulse force feedback signal and deformation process of the test sensor 12 are represented in the same two-dimensional coordinate diagram with time as the horizontal axis, different signal curves and deformation curves will contain different time points, and these time points include in chronological order:

[0048] t1: the time point when the high-speed camera is turned on;

[0049] t2: the time point when the impulse force controller 21 sends out the control signal, which is also the time point when the data collector 14 starts collecting data;

[0050] t3: the time point when the high-speed camera 24 captures the deformation of the thrust sensor 12 due to the compression of the pulse force;

[0051] t4: the time point when the data collector 14 collects the impulse force feedback signal;

[0052] t5: the time point when the data collector 14 collects the thrust signal of the thrust sensor 12;

[0053] t6: the time point when the control signal of the impulse force controller 21 drops to 0;

[0054] t7: the time point when the high-speed camera 24 captures the disappearance of the deformation of the thrust sensor 12, which is also the time point when the pulse force disappears;

[0055] t8: the time point when the pulse force feedback signal of the pulse force generating device 22 drops to 0;

[0056] t9: The time point when the test sensor 12 drops to 0.

[0057] t10: The time point when the high-speed camera 24 stops working.

[0058] Furthermore, by analyzing the time intervals between the above-mentioned moments, the corresponding response time can be calculated, and it can be determined whether the response time meets expectations, so that subsequent adjustments can be made according to the determination results.

[0059] Specifically, different response times can be calculated based on the time intervals between different time points. As follows:

[0060] t2-t3: pulse force response time, that is, the time interval from the issuance of the control signal to the generation of the pulse force by the pulse force generating device 22.

[0061] t3-t4: impulse force feedback response time, that is, the time interval from the generation of the impulse force to the acquisition of the impulse force feedback signal by the data collector 14 .

[0062] t3-t5: thrust response time, that is, the time interval from when the test sensor 12 generates deformation to when the data collector 14 collects the thrust signal.

[0063] In addition, in this embodiment, a response time analysis module that can automatically analyze and judge the response time according to the two-dimensional coordinate graph data can be set in the data analysis system 3, so as to automatically complete the above analysis and judgment process without relying on manual work.

[0064] Functions and Effects of the Embodiments

[0065] In the present embodiment, since the test bench 1 has a load-bearing pier 11 connected to the engine bench 200, the test sensor 12 is connected to the load-bearing pier 11 via the sensor fixing platform 13, and the pulse force generating device 22 can generate a pulse force on the test sensor 12, therefore, each test component is actually directly connected to the engine bench 200 of the engine to be tested, which can save the steps of repeated disassembly and assembly of the device, and realize the in-situ measurement of the response time.

[0066] In addition, since the high-speed camera 24 can capture the contact surface between the pulse force generating device 22 and the test sensor 12 to obtain the deformation process of the test sensor 12, the data analysis system 3 synchronizes the deformation process with the thrust signal, control signal pulse, and impulse feedback signal of the test sensor 12 and represents them in a two-dimensional coordinate graph, accurate response time data can be obtained through the two-dimensional coordinate graph.

[0067] Those skilled in the art should understand that the present invention is not limited to the above embodiments, and the above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, and these changes and improvements fall within the scope of the present invention to be protected. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. An in-situ measurement device for engine thrust test response time, used for measuring the inference test response time of an engine bench, characterized in that: include: A test bench having a load-bearing pier connected to the engine bench and a test sensor connected to the load-bearing pier; The verification test system comprises an impulse force generating device for generating an impulse force to the test sensor so that the test sensor is deformed, an impulse force controller for controlling the impulse force generating device, a high-speed camera for photographing the contact surface between the impulse force generating device and the test sensor, and a data collector respectively connected to the test sensors; A data analysis system is connected to the data acquisition device and the high-speed camera, and is used to at least receive a thrust signal generated by the test sensor due to deformation from the data acquisition device, receive image data of the deformation occurring at the contact surface from the high-speed camera, and at least synchronize the thrust signal with the deformation process.

2. The in-situ measurement device for engine thrust test response time according to claim 1, characterized in that: in, The test bench also includes a sensor fixing platform, The test sensor is connected to the load-bearing pier through the sensor fixing platform.

3. The in-situ measurement device for engine thrust test response time according to claim 1, characterized in that: in, The high-speed camera is also provided with an optical lens.

4. The in-situ measurement device for engine thrust test response time according to claim 1, characterized in that: in, The test sensor is a pressure sensor.

5. An in-situ measurement method for engine thrust test response time, characterized in that: The engine thrust test response time in-situ measurement device according to any one of claims 1 to 4 is used for measurement, comprising the following steps: Step S1: using the data analysis system to send a start instruction to the high-speed camera to start shooting, and at the same time sending a test instruction to the impulse force controller; Step S2: the impulse force controller sends control signals to the impulse force generating device and the data collector respectively according to the test instruction, so that the impulse force generating device generates impulse force while the data collector collects the thrust signal generated by the test sensor; Step S3: the data analysis system receives the thrust signal, the pulse force feedback signal and the image data from the data acquisition device, and determines the duration of the deformation process of the test sensor according to the image data; Step S4: The data analysis system synchronizes the test signal, the thrust signal, the impulse force feedback signal of the impulse force controller and the deformation process in time sequence and represents them in a two-dimensional coordinate diagram.

6. The in-situ measurement method for engine thrust test response time according to claim 1, characterized in that: in, The data analysis system also displays the two-dimensional coordinate graph through a display.

7. The in-situ measurement method for engine thrust test response time according to claim 1, characterized in that: in, The data analysis system also has a response time analysis module for automatically analyzing and judging the response time according to the two-dimensional coordinate data.

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