A method and apparatus for measuring in situ the response time of an engine thrust test

Abstract

The application aims to realize in-situ measurement of engine thrust test response time, and specifically provides an engine thrust test response time in-situ measurement device, comprising: a test bench having a force bearing pier connected to an engine bench and a test sensor connected to the force bearing pier; a verification test system having a pulse force generating device for generating a pulse force to the test sensor, a pulse force controller for controlling the pulse force generating device, a high-speed camera for shooting a contact surface part of the pulse force generating device and the test sensor, and a data collector; a data analysis system connected to the data collector and the high-speed camera, for receiving at least a thrust signal generated by the test sensor due to deformation from the data collector, receiving image data of the contact surface part deformed from the high-speed camera, and at least synchronizing the thrust signal and the deformation process in time sequence. The application also provides a corresponding engine thrust test response time in-situ measurement method.

Description

TECHNICAL FIELD

[0001] The present application belongs to the field of engine test and measurement technology, and relates to an in-situ measurement method and device for engine thrust test response time. BACKGROUND

[0002] An engine is the heart of an aerospace vehicle and is technically complex. Engine test technology is an important means of evaluating an engine and can timely find potential defects of the engine, which is of great significance to quality assurance, safety verification and performance evaluation of the engine.

[0003] Thrust test is an important part of engine test technology. Through thrust test, the performance of an engine under different conditions can be determined to ensure safety and stability under extreme conditions. Thrust response time refers to the time required for an engine to actually reach a corresponding thrust state from the time when an instruction to change the thrust of the engine is issued. The thrust response time plays an important role in rapidly changing the thrust of the engine in an emergency and is of great significance to the safe operation of a spacecraft, and thus is an important part of engine thrust test.

[0004] Existing thrust response time test methods include pulse response method and step response method. For example, the test process of the pulse response method is as follows: first, connect a sensor with a shock tube, generate a step pressure signal by using a burst diaphragm generator, record the response waveform of the sensor by using a transient recording instrument, and the time duration from the time when the output value of the sensor rises from 10% of the stable value to the time when the output value of the sensor reaches 90% of the stable value is the response time.

[0005] However, the existing thrust response time test methods all need to use a special device to measure separately, which increases unnecessary troubles. At present, there is no simple, direct and effective in-situ measurement device for engine thrust test response time. SUMMARY

[0006] The present application aims to provide an in-situ measurement method and device for engine thrust test response time, which generates a pulse force on an engine test bench by installing a pulse force generating device on the engine test bench, measures the pulse force by using an engine thrust sensor, and realizes in-situ measurement of the engine thrust test response time by analyzing a pulse force generating control signal, a pulse force loading signal and a thrust sensor signal.

[0007] Specifically, the application provides an engine thrust test response time in-situ measurement device for reasoning test response time measurement on an engine test bench of an engine, comprising: a test bench having a bearing pier connected to the engine test bench and a test sensor connected to the bearing pier; a verification test system having a pulse force generating device for generating a pulse force to make the test sensor deform, a pulse force controller for controlling the pulse force generating device, a high-speed camera for shooting a contact surface part of the pulse force generating device and the test sensor, and a data collector connected to the test sensor respectively; and a data analysis system connected to the data collector and the high-speed camera, for receiving at least a thrust signal generated by the test sensor due to deformation from the data collector, receiving image data of the deformation of the contact surface part from the high-speed camera, and synchronizing at least the thrust signal and the deformation process in time sequence.

[0008] Further, the engine thrust test response time in-situ measurement device of the application can further have the technical features that the test bench further comprises a sensor fixing table, and the test sensor is connected to the bearing pier through the sensor fixing table.

[0009] The engine thrust test response time in-situ measurement device of the application can further have the technical features that the high-speed camera is further provided with an optical lens.

[0010] The engine thrust test response time in-situ measurement device of the application can further have the technical features that the test sensor is a pressure sensor.

[0011] The application further provides an engine thrust test response time in-situ measurement method, which is measured by using the engine thrust test response time in-situ measurement device according to any one of the above, and comprises the following steps:

[0012] Step S1: sending an opening instruction to the high-speed camera to make the high-speed camera start shooting, and sending a test instruction to the pulse force controller by using the data analysis system;

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

[0014] Step S3: receiving the thrust signal and the pulse force feedback signal transmitted by the data collector and the image data transmitted by the high-speed camera by using the data analysis system, and judging 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 and represents them in a two-dimensional coordinate graph.

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

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

[0018] Effects of the application

[0019] In the application, the test bench has a bearing pier connected to the engine bench, the test sensor is connected to the bearing pier, and the pulse force generating device can generate pulse force on the test sensor. Therefore, the test components are actually directly connected to the engine bench of the engine to be tested, and the step of repeatedly disassembling the device can be omitted to realize in-situ measurement of the response time.

[0020] In addition, the verification test system also has a high-speed camera for shooting the contact surface part of the pulse force generating device and the test sensor. The high-speed camera can shoot the deformation process of the test sensor, and the thrust signal of the test sensor can be synchronized with the test sensor through the data analysis system. Therefore, through further data analysis, the time diagram from the control signal to the time when the thrust sensor generates the thrust signal can be obtained, and accurate response time data can be obtained. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 FIG. 1 is a schematic diagram of the engine thrust test response time in-situ measurement device in the embodiment.

[0022] Figure 2 FIG. 2 is a flowchart of the measurement method of the application in the embodiment.

[0023] Figure 3 FIG. 3 is a signal diagram output by the data analysis system in the embodiment. DETAILED DESCRIPTION

[0024] In order to make the technical means, creative features, purposes and effects of the application easy to understand, the engine thrust test response time in-situ measurement device and method of the application are specifically described below in combination with the drawings.

[0025] Figure 1 FIG. 1 is a schematic diagram of the engine thrust test response time in-situ measurement device in the embodiment.

[0026] As Figure 1 shown, the engine thrust test response time in-situ measuring device (hereinafter referred to as measuring device) 100 of the present embodiment is used for measuring the thrust test response time of the engine test bench 200, including the test bench 1, the verification test system 2 and the data analysis system 3.

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

[0028] The force bearing pier 11 is connected to the engine test bench 200. In the present embodiment, the force bearing pier 11 is installed on one end of the engine test bench 200.

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

[0030] The test sensor 12 is fixed on the sensor fixing platform 13, so as to be connected to the force 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 being squeezed during signal collection, the test sensor 12 can stably generate a thrust signal and transmit the thrust signal to the data collector 14. In the present embodiment, the test sensor 12 is a resistance pressure sensor.

[0031] The data collector 14 is connected to the data analysis system 3, and is used for collecting thrust signal data through the test sensor 12 and transmitting 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 connector 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 respectively, and is used for sending control signals to the pulse force generating device 22 and the data collector 14 respectively, so as to make the pulse force generating device 22 generate a pulse force and make the data collector 14 start collecting signals at the same time. In the present 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 a test start signal from the data analysis system 3.

[0034] The pulse force generating device 22 is fixed on the surface of the test sensor 12 through the pulse force generating device connecting piece 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 extrude the test sensor 12 in a pulse mode, so that the test sensor 12 is deformed. In the embodiment, the pulse force generating device 22 comprises 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, which is applied to the piezoelectric ceramic element, so that the piezoelectric ceramic element is deformed instantaneously to form a pulse force.

[0035] The pulse force generating device connecting piece 23 is used to connect the pulse force generating device 22 and the test sensor 12. In the embodiment, the shape of the pulse force generating device connecting piece 23 can be adjusted according to the pulse force generating device 22 and the test sensor 12, as long as it can realize the functions of fixedly installing the pulse force generating device 22 and tightly contacting the piezoelectric ceramic element with the force receiving 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 above the contact surface of the pulse force generating device 22 and the test sensor 12. The high-speed camera 24 has an optical lens 25 suitable for high-speed photography, which is used to photograph the contact surface part of the pulse force generating device 22 and the test sensor 12. In the embodiment, the high-speed camera 24 is triggered to continuously photograph at high speed. The high-speed camera 24 is also connected to the data analysis system 3 to synchronously transmit the image data obtained by continuous photographing to the data analysis system 3.

[0037] The data analysis system 3 of the embodiment is a computer, which has an image analysis module and can identify the contact surface of the pulse force generating device 22 and the test sensor 12 from the image data through image recognition and other prior art means, and judge whether the contact surface is deformed through image analysis, so as to judge the time when the test sensor 12 is deformed according to the time corresponding to the image frame in which deformation occurs. In addition, the data analysis system 3 also has a man-machine interface, which is used for the operator to input test instructions and view the corresponding test results.

[0038] In the embodiment, after the installation of each component of the measuring device 100 is completed, the in-situ measurement of the engine thrust test response time can be performed.

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

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

[0041] Step S1: The operator inputs a test start instruction through the data analysis system 3, the data analysis system 3 sends an opening instruction to the high-speed camera 24 to make the high-speed camera 24 start shooting, and the data analysis system 3 also simultaneously 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 instruction, so that the pulse force generating device 22 generates a pulse force while the data collector 14 starts collecting work; the control signals are also fed back to the data analysis system 3.

[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, and at the same time, the pulse force generating device 22 will squeeze the test sensor 12 at the moment of generating the pulse force, so that it is deformed under stress and generates a thrust signal, which is also collected by the data collector 14 in real time.

[0044] Step S3: The data analysis system 3 receives the thrust signal, the pulse force feedback signal transmitted by the data collector 14, and the image data transmitted by the high-speed camera 24, and judges 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, pulse force feedback signal and deformation process of the test sensor 12 in time and represents them in a two-dimensional coordinate graph, further displays the two-dimensional coordinate graph through a display or the like, so that the operator can view the two-dimensional coordinate graph and obtain response time data, so as to analyze and judge whether the response time meets the expectation.

[0046] Figure 3 is a response time analysis and judgment schematic diagram of the embodiment.

[0047] As Figure 3 shown, when the control signal, the thrust signal, the pulse force feedback signal and the deformation process of the test sensor 12 are represented in the same two-dimensional coordinate graph with time as the horizontal coordinate, different signal curves and deformation curves will contain different time points, which include in turn according to the time sequence:

[0048] t1: opening time point of the high-speed camera;

[0049] t2: the time point at which the pulse force controller 21 sends the control signal, which is also the time point at which the data collector 14 starts to collect data;

[0050] t3: the time point at which the high-speed camera 24 captures the deformation of the test sensor 12 caused by the pulse force;

[0051] t4: the time point at which the data collector 14 collects the pulse force feedback signal;

[0052] t5: the time point at which the data collector 14 collects the test force signal of the test sensor 12;

[0053] t6: the time point at which the control signal of the pulse force controller 21 drops to 0;

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

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

[0056] t9: the time point at which the test sensor 12 drops to 0.

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

[0058] Further, by analyzing the time intervals of the above time points, the corresponding response times can be calculated, and it can be determined whether the response times meet the expectations, so that subsequent adjustments can be made according to the determination results.

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

[0060] t2-t3: pulse force response time, which is the time interval between the sending of the control signal and the generation of the pulse force by the pulse force generating device 22.

[0061] t3-t4: pulse force feedback response time, which is the time interval between the generation of the pulse force and the collection of the pulse force feedback signal by the data collector 14.

[0062] t3-t5: test force response time, which is the time interval between the deformation of the test sensor 12 and the collection of the test force signal by the data collector 14.

[0063] In addition, in the present embodiment, a response time analysis module capable of automatically analyzing and determining the response time according to the two-dimensional coordinate graph data can also be set in the data analysis system 3, so that the above analysis and determination process can be automatically completed without relying on manual work.

[0064] Effects of the embodiment

[0065] In this embodiment, since the test bench 1 has the supporting pier 11 connected to the engine bench 200, the test sensor 12 is connected to the supporting pier 11 through the sensor fixing bench 13, and the impulse force generating device 22 can generate impulse force to the test sensor 12, therefore, each test component is actually directly connected to the engine bench 200 of the engine to be tested, and the step of repeatedly disassembling the device can be omitted, and the in-situ measurement of response time is realized.

[0066] In addition, since the high-speed camera 24 can shoot the contact surface part of the impulse 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, the control signal pulse and the impulse force feedback signal of the test sensor 12 in time sequence and represents them in a two-dimensional coordinate graph, therefore, accurate response time data can be obtained through the two-dimensional coordinate graph.

[0067] Those skilled in the art should understand that the present application is not limited to the above-mentioned embodiments, and the above-mentioned embodiments and descriptions in the specification are only to illustrate the principles of the present application, and various changes and improvements can be made without departing from the spirit and scope of the present application, and these changes and improvements all fall within the scope of the present application. The scope of protection of the present application is defined by the appended claims and their equivalents.

Claims

1. An engine thrust test response time in situ measurement device for inferential test response time measurement of an engine test stand of an engine, characterized by, The application relates to an engine thrust test response time in-situ measuring device. The device comprises: a test bench with a bearing pier connected to the engine bench and a test sensor connected to the bearing pier; a verification test system with a pulse force generating device for generating a pulse force to make the test sensor deform, 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 connected to the test sensor respectively; and a data analysis system connected to the data collector and the high-speed camera, used for receiving the thrust signal generated by the test sensor due to deformation from the data collector, receiving the image data of the deformation of the contact surface part from the high-speed camera, and synchronizing the thrust signal and the deformation process in time.

2. The engine thrust test response time in-situ measuring device according to claim 1, wherein: the test bench further comprises a sensor fixing table, and the test sensor is connected to the bearing pier through the sensor fixing table.

3. The engine thrust test response time in-situ measuring device according to claim 1, wherein: the high-speed camera is further provided with an optical lens.

4. The engine thrust test response time in-situ measuring device according to claim 1, wherein: the test sensor is a pressure sensor. wherein The engine thrust test response time in-situ measuring device according to any one of claims 1-4 is used for measurement, comprising the following steps: Step S1: an operator inputs a test start instruction through the data analysis system, the data analysis system sends an opening instruction to the high-speed camera to make the high-speed camera start shooting, and the data analysis system also simultaneously sends a test instruction to the pulse force controller according to the test start instruction; 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 a pulse force and the data collector starts collecting at the same time; the control signals are also fed back to the data analysis system, wherein after the pulse force is generated, the pulse force generating device forms a pulse force feedback signal and transmits the pulse force feedback signal to the data collector for collection, at the same time, the test sensor is extruded by the pulse force generating device to make the test sensor deform and generate the thrust signal, and the thrust signal is also collected by the data collector in real time; Step S3: the data analysis system receives the thrust signal and the pulse force feedback signal transmitted by the data collector and the image data transmitted by the high-speed camera, and judges the duration of the whole deformation process of the test sensor according to the received image data. wherein, ​ 5. An engine thrust test response time in-situ measurement method, characterized in that, ​ ​ ​ ​ ​ Step S4: The data analysis system synchronizes the control signal fed back by the pulse force controller, the received thrust signal, the pulse force feedback signal and the deformation process of the test sensor in time and represents them in a two-dimensional coordinate graph, further displays the two-dimensional coordinate graph through a display, so that the operator can view the two-dimensional coordinate graph and obtain response time data, thereby analyzing and judging whether the response time meets the expectation.

6. The engine thrust test response time in-situ measurement method according to claim 5, characterized in that: wherein The data analysis system further displays the two-dimensional coordinate graph through a display.

7. The engine thrust test response time in-situ measurement method according to claim 5, characterized in that: wherein The data analysis system further has a response time analysis module for automatically analyzing and judging the response time according to the data of the two-dimensional coordinate graph.

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