Wind tunnel data real-time detection system and detection method thereof

Abstract

The invention discloses a wind tunnel data real-time detection system and a detection method thereof, and belongs to the technical field of wind tunnel detection. In order to realize real-time detection of wind tunnel data, the system comprises an upper computer, a signal converter, a high-precision signal source, a network interface, a dynamic acquisition system, a static acquisition system and a high-precision signal tester, the upper computer is respectively connected with the high-precision signal source, the dynamic acquisition system, the static acquisition system and the high-precision signal tester through network interfaces, and the dynamic acquisition system is respectively connected with the signal converter and the high-precision signal source; the signal converter is respectively connected with the dynamic balance control circuit, the static balance control circuit and the static acquisition system; and the high-precision signal tester is respectively connected with the static balance control circuit, the signal converter and the high-precision signal source. According to the invention, functions of automatic detection of a wind tunnel test acquisition system, measurement synchronism detection between input channels, delay calculation and the like are realized.

Description

Technical Field

[0001] The present invention belongs to the technical field of wind tunnel detection, and particularly relates to a real-time wind tunnel data detection system and a detection method thereof. Background Art

[0002] The data acquisition system includes a conventional static acquisition system and a dynamic acquisition system. The dynamic acquisition system is used to collect the outputs of dynamic signals such as the propeller rotation axis balance, rotational speed sensor, vibration sensor, and strain on the propeller blade. The characteristics of these output signals are rapid periodic changes, and the data is related to time and position. It is necessary to strictly ensure the consistency of the acquisition time of each dynamic data. The static acquisition system is used for conventional force measurement tests. With the continuous improvement of users' requirements for wind tunnel tests, the requirements for the accuracy of the data acquisition system and measurement equipment are also getting higher and higher. Summary of the Invention

[0003] The problem to be solved by the present invention is to realize real-time detection of wind tunnel data, and a real-time wind tunnel data detection system and a detection method thereof are proposed.

[0004] To achieve the above object, the present invention is realized through the following technical solutions: A real-time wind tunnel data detection system includes a host computer, a signal converter, a high-precision signal source, a network interface, a dynamic acquisition system, a static acquisition system, and a high-precision signal tester; The host computer is respectively connected to the high-precision signal source, the dynamic acquisition system, the static acquisition system, and the high-precision signal tester through the network interface. The dynamic acquisition system is respectively connected to the signal converter and the high-precision signal source; the signal converter is respectively connected to the dynamic balance control circuit, the static balance control circuit, and the static acquisition system; The high-precision signal tester is respectively connected to the static balance control circuit, the signal converter, and the high-precision signal source; The signal converter includes a signal amplifier, a sensitivity compensation module, a linear compensation module, a programmable gain amplifier module, and a signal filtering module; The signal amplifier, the sensitivity compensation module, and the linear compensation module are connected in sequence; the signal amplifier is connected to the dynamic balance control circuit, and the linear compensation module is connected to the dynamic acquisition system; The programmable gain amplifier module and the signal filtering module are connected in sequence; the programmable gain amplifier module is connected to the static balance control circuit and the high-precision signal source, and the signal filtering module is connected to the static acquisition system.

[0005] Further, a relay is provided on the connection circuit between the high-precision signal tester and the static balance control circuit.

[0006] Further, a relay is provided on the connection circuit between the programmable gain module and the high-precision signal source.

[0007] Further, a relay is provided on the connection circuit between the programmable gain module and the static balance control circuit.

[0008] Further, the model of the static acquisition system is VXI.

[0009] Further, the model of the dynamic acquisition system is HBM.

[0010] Further, the model of the high-precision signal tester is 8508A.

[0011] A detection method of a wind tunnel data real-time detection system, which is realized relying on the described wind tunnel data real-time detection system, includes the implementation detection and calibration of the dynamic acquisition system and the static acquisition system, and the detection and calibration of the balance signal; The method for implementing the detection and calibration of the static acquisition system is to close the relay between the static balance control circuit and the high-precision signal source, the upper computer sets the output of the high-precision signal source through the network interface, the output data is connected to the static acquisition system through the signal converter, the data of the static acquisition system is collected through the signal converter and the upper computer, and the data of the static acquisition system is compared with the output of the high-precision signal source to complete the detection and calibration work of the static acquisition system; The method for implementing the detection and calibration of the dynamic acquisition system is that the upper computer sets the output of the high-precision signal source through the network interface, the output data is connected to the dynamic acquisition system through the signal converter, the data of the dynamic acquisition system is collected through the signal converter and the upper computer, and the data of the dynamic acquisition system is compared with the output of the high-precision signal source to complete the detection and calibration work of the dynamic acquisition system; The method for implementing the detection and calibration of the balance signal is to connect the high-precision signal tester to the static balance control circuit through a relay, disconnect the static balance control circuit from the programmable gain module through a relay, the high-precision signal tester simulates the test state, and the settings include the number of channels used, the output voltage value, the acquisition speed, and the balance output. The high-precision signal tester collects data, and the data collected by the high-precision signal tester is compared with the set balance output to complete the monitoring and calibration work of the balance signal.

[0012] The beneficial effects of the present invention: A real-time wind tunnel data detection system according to the present invention introduces a standard signal during testing and can automatically restore the original input state after testing. The present invention can perform real-time data detection on dozens of parameters during the operation of the system, solve technical problems such as synchronous determination, phase transformation, and acquisition system noise interference in the dynamic signals of the rotary balance, and realize functions such as automatic detection of the wind tunnel test acquisition system, measurement synchronization detection between input channels, and delay calculation. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic structural diagram of a real-time wind tunnel data detection system according to the present invention. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0014] In order to make the objectives, technical solutions and advantages of the present invention clearer and more understandable, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention, that is, the specific embodiments described are only a part of the embodiments of the present invention, rather than all of the specific embodiments. Usually, the components of the specific embodiments of the present invention described and shown in the accompanying drawings herein can be arranged and designed in various different configurations, and the present invention can also have other embodiments.

[0015] Therefore, the detailed description of the specific embodiments of the present invention provided in the accompanying drawings below is not intended to limit the scope of the claimed invention, but merely represents the selected specific embodiments of the present invention. All other specific embodiments obtained by those skilled in the art based on the specific embodiments of the present invention without creative efforts fall within the scope of protection of the present invention.

[0016] To further understand the content, features and effects of the present invention, the following specific embodiments are exemplified and described in detail in conjunction with the attached Figure 1 as follows:

[0017] Embodiment 1: A real-time wind tunnel data detection system includes a host computer 1, a signal converter 2, a high-precision signal source 3, a network interface 4, a dynamic acquisition system 5, a static acquisition system 6, and a high-precision signal tester 7; The host computer 1 is respectively connected to the high-precision signal source 3, the dynamic acquisition system 5, the static acquisition system 6, and the high-precision signal tester 7 through the network interface 4. The dynamic acquisition system 5 is respectively connected to the signal converter 2 and the high-precision signal source 3; the signal converter 2 is respectively connected to the dynamic balance control circuit 8, the static balance control circuit 9, and the static acquisition system 6; The high-precision signal tester 7 is respectively connected to the static balance control circuit 9, the signal converter 2, and the high-precision signal source 3; The signal converter 2 includes a signal amplifier 201, a sensitivity compensation module 202, a linear compensation module 203, a programmable gain amplifier module 204, and a signal filtering module 205; The signal amplifier 201, the sensitivity compensation module 202, and the linear compensation module 203 are connected in sequence; the signal amplifier 201 is connected to the dynamic balance control circuit 8, and the linear compensation module 203 is connected to the dynamic acquisition system 5; The programmable gain amplifier module 204 and the signal filtering module 205 are connected in sequence; the programmable gain amplifier module 204 is connected to the static balance control circuit 9 and the high-precision signal source 3, and the signal filtering module 205 is connected to the static acquisition system 6.

[0018] Furthermore, a relay 10 is provided on the connection circuit between the high-precision signal tester 7 and the static balance control circuit 9.

[0019] Furthermore, a relay 10 is provided on the connection circuit between the programmable gain amplifier module 204 and the high-precision signal source 3.

[0020] Furthermore, a relay 10 is provided on the connection circuit between the programmable gain amplifier module 204 and the static balance control circuit 9.

[0021] Furthermore, the model of the static acquisition system 6 is VXI.

[0022] Furthermore, the model of the dynamic acquisition system 5 is HBM.

[0023] Furthermore, the model of the high-precision signal tester 7 is 8508A. Embodiment

[0024] A detection method of a wind tunnel data real-time detection system, which is realized relying on the wind tunnel data real-time detection system described in Embodiment 1, includes performing detection and calibration on the dynamic acquisition system and the static acquisition system, and performing detection and calibration on the balance signal; The method for performing detection and calibration on the static acquisition system is to close the relay between the static balance control circuit and the high-precision signal source, the upper computer sets the output of the high-precision signal source through the network interface, the output data is connected to the static acquisition system through the signal converter, the data of the static acquisition system is collected through the signal converter and the upper computer, and the data of the static acquisition system is compared with the output of the high-precision signal source to complete the detection and calibration work of the static acquisition system; The method for implementing detection and calibration of a dynamic acquisition system is that the host computer sets the output of a high-precision signal source through a network interface, the output data is connected to the dynamic acquisition system through a signal converter, the data of the dynamic acquisition system is collected through the signal converter and the host computer, and the data of the dynamic acquisition system is compared with the output of the high-precision signal source to complete the detection and calibration of the dynamic acquisition system; The method for implementing detection and calibration of the balance signal is to connect a high-precision signal tester to the static balance control circuit through a relay. The static balance control circuit is disconnected from the programmable gain module through the relay. The high-precision signal tester simulates the test state and sets parameters including the number of channels used, output voltage value, acquisition speed, and balance output. The high-precision signal tester collects data and compares the data collected by the high-precision signal tester with the set balance output to complete the monitoring and calibration of the balance signal.

[0025] For the detection method of a wind tunnel data real-time detection system described in this embodiment, experimental data results of the online detection and calibration tasks of the data acquisition system are shown in Tables 1, 2, and 3 as follows: Table 1 Calibration Data of Static Acquisition System

[0026] Table 2 Calibration Data of Dynamic Acquisition System

[0027] Table 3 Balance Calibration Data

[0028] The calibration calculation formulas for each channel include the following formulas: The calculation formula for the single-point sampling accuracy deviation is as follows: ; Where, is the single-point sampling accuracy deviation, is the th output value, is the average value of the output values; The calculation formula for accuracy is: ; Where, is the accuracy, is the input signal, is the full-scale voltage value, The calculation formula for gain is: ; Where K is the gain, is the th output value, is the One input signal; The calculation formula for the intercept is: ; where B is the intercept; The calculation formula for the output deviation is: ; where is the output deviation.

[0029] Based on the above formulas, perform regular detection and calibration, and automatically store the calibration results of each channel, such as parameters like gain and output deviation, into the host computer.

[0030] It should be noted that relational terms such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements not only includes those elements, but also includes other elements not expressly listed, or elements inherent to such process, method, article or device. Without further limitation, an element defined by the phrase "comprising a..." does not exclude the existence of additional identical elements in the process, method, article or device comprising the element.

[0031] Although the present application has been described above with reference to specific embodiments, various improvements can be made to it and components can be replaced with equivalents without departing from the scope of the present application. In particular, as long as there is no structural conflict, the various features in the specific embodiments disclosed in the present application can be combined with each other in any way, and the exhaustive description of these combinations is omitted in this specification only for the sake of saving space and resources. Therefore, the present application is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A real-time wind tunnel data detection system, characterized in that, It includes a host computer (1), a signal converter (2), a high-precision signal source (3), a network interface (4), a dynamic acquisition system (5), a static acquisition system (6), and a high-precision signal tester (7); The host computer (1) is respectively connected to the high-precision signal source (3), the dynamic acquisition system (5), the static acquisition system (6), and the high-precision signal tester (7) through the network interface (4). The dynamic acquisition system (5) is respectively connected to the signal converter (2) and the high-precision signal source (3); The signal converter (2) is respectively connected to the dynamic balance control circuit (8), the static balance control circuit (9), and the static acquisition system (6); The high-precision signal tester (7) is respectively connected to the static balance control circuit (9), the signal converter (2), and the high-precision signal source (3); The signal converter (2) includes a signal amplifier (201), a sensitivity compensation module (202), a linear compensation module (203), a programmable gain amplifier module (204), and a signal filtering module (205); The signal amplifier (201), the sensitivity compensation module (202), and the linear compensation module (203) are connected in sequence; The signal amplifier (201) is connected to the dynamic balance control circuit (8), and the linear compensation module (203) is connected to the dynamic acquisition system (5); The programmable gain amplifier module (204) and the signal filtering module (205) are connected in sequence; The programmable gain amplifier module (204) is connected to the static balance control circuit (9) and the high-precision signal source (3), and the signal filtering module (205) is connected to the static acquisition system (6).

2. The real-time wind tunnel data detection system according to claim 1, characterized in that A relay (10) is provided on the connection circuit between the high-precision signal tester (7) and the static balance control circuit (9).

3. The real-time wind tunnel data detection system according to claim 2, characterized in that, A relay (10) is provided on the connection circuit between the programmable gain amplifier module (204) and the high-precision signal source (3).

4. The real-time wind tunnel data detection system according to claim 3, characterized in that A relay (10) is provided on the connection circuit between the programmable gain amplifier module (204) and the static balance control circuit (9).

5. The real-time wind tunnel data detection system according to claim 4, characterized in that The model of the static acquisition system (6) is VXI.

6. The real-time wind tunnel data detection system according to claim 5, characterized in that The model of the dynamic acquisition system (5) is HBM.

7. A real-time wind tunnel data detection system according to claim 6, characterized in that, The model of the high-precision signal tester (7) is 8508A.

8. A detection method for a real-time wind tunnel data detection system, which is implemented relying on the real-time wind tunnel data detection system according to any one of claims 1-7, characterized in that, It includes the implementation of detection and calibration for the dynamic acquisition system and the static acquisition system, and the implementation of detection and calibration for the balance signal; The method for the implementation of detection and calibration of the static acquisition system is to close the relay between the static balance control circuit and the high-precision signal source. The host computer sets the output of the high-precision signal source through the network interface. The output data is connected to the static acquisition system through the signal converter. The data of the static acquisition system is collected through the signal converter and the host computer. The data of the static acquisition system is compared with the output of the high-precision signal source to complete the detection and calibration work of the static acquisition system; The method for implementing detection and calibration of a dynamic acquisition system is that the host computer sets the output of a high-precision signal source through a network interface, and the output data is connected to the dynamic acquisition system through a signal converter. The data of the dynamic acquisition system is collected through the signal converter and the host computer, and the data of the dynamic acquisition system is compared with the output of the high-precision signal source to complete the detection and calibration of the dynamic acquisition system; The method for implementing detection and calibration of a balance signal is that a high-precision signal tester is connected to a static balance control circuit through a relay. The static balance control circuit is disconnected from the programmable gain module through a relay. The high-precision signal tester simulates the test state and sets parameters including the number of channels used, output voltage value, acquisition speed, and balance output. The high-precision signal tester collects data and compares the data collected by the high-precision signal tester with the set balance output to complete the monitoring and calibration of the balance signal.

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