CN203824734U - Experiment device used for pressure measuring tube correction in wind tunnel test - Google Patents
Experiment device used for pressure measuring tube correction in wind tunnel test Download PDFInfo
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- CN203824734U CN203824734U CN201420181572.XU CN201420181572U CN203824734U CN 203824734 U CN203824734 U CN 203824734U CN 201420181572 U CN201420181572 U CN 201420181572U CN 203824734 U CN203824734 U CN 203824734U
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Abstract
一种用于风洞试验测压管道修正的实验装置，包括底板、信号发生器、功率放大器、扬声器、固定钢支架、活动钢支架，固定钢支架固定在底板上方，扬声器固定安装在固定钢支架上；扬声器与功率放大器通过导线相连，功率放大器与信号发生器通过导线相连；活动钢支架与固定钢支架平行相对放置，活动钢支架面向固定钢支架一侧设有测压孔板，测压孔板上设有两个以上测压点；活动钢支架背向固定钢支架一侧设有压力传感器模块，压力传感器模块与两个以上测压点分别通过一个或多个长的管路系统及一根短管相连；活动钢支架的底部设有滑轮结构，活动钢支架通过滑轮结构可移动地放置在底板上。
An experimental device for wind tunnel test pressure measurement pipeline correction, including a base plate, a signal generator, a power amplifier, a speaker, a fixed steel bracket, and a movable steel bracket. The fixed steel bracket is fixed above the base plate, and the loudspeaker is fixedly installed on the fixed steel bracket. Above; the loudspeaker is connected to the power amplifier through wires, and the power amplifier is connected to the signal generator through wires; the movable steel bracket is placed parallel to the fixed steel bracket, and the side of the movable steel bracket facing the fixed steel bracket is equipped with a pressure measuring orifice plate and a pressure measuring hole There are more than two pressure measuring points on the board; a pressure sensor module is installed on the side of the movable steel bracket facing away from the fixed steel bracket, and the pressure sensor module and the two or more pressure measuring points pass through one or more long pipeline systems and a The bottom of the movable steel bracket is provided with a pulley structure, and the movable steel bracket is movably placed on the bottom plate through the pulley structure.
Description
技术领域 technical field
本实用新型涉及一种实验装置，尤其是涉及一种用于风洞试验测压管道修正的实验装置。 The utility model relates to an experimental device, in particular to an experimental device for wind tunnel test pressure measurement pipeline correction.
背景技术 Background technique
为了研究结构的风致振动，必须获得结构风荷载中脉动风压的信息。风洞刚性模型测压试验可以得到结构表面风荷载的分布信息，是获得建筑结构风荷载的重要方法。刚性模型的测压管路系统一般包括模型表面的金属短管及连接金属管和传感器的PVC管等管道元件，是刚性模型测压试验中的关键部分。风洞试验中，连接模型表面测点到压力模块的有限长度的传压管路所引起的信号畸变问题是影响脉动风压测试精度的一个主要因素。为了获得模型表面真实的压力信号，在设计管道系统时，需要保证在感兴趣的实验频率范围内，压力信号经过管道系统之后的幅值和相位的改变在实验误差允许的范围之内。 In order to study the wind-induced vibration of a structure, it is necessary to obtain the information of the fluctuating wind pressure in the wind load of the structure. The wind tunnel rigid model pressure test can obtain the distribution information of the wind load on the structure surface, and is an important method to obtain the wind load of the building structure. The pressure measurement piping system of the rigid model generally includes metal short pipes on the surface of the model and PVC pipes connecting the metal pipes and sensors and other piping components, which are the key parts of the rigid model pressure measurement test. In the wind tunnel test, the signal distortion caused by the limited length of the pressure transmission pipeline connecting the model surface measuring point to the pressure module is a main factor affecting the accuracy of the fluctuating wind pressure test. In order to obtain the real pressure signal on the surface of the model, when designing the piping system, it is necessary to ensure that within the experimental frequency range of interest, the amplitude and phase changes of the pressure signal after passing through the piping system are within the allowable range of experimental errors.
目前，为了确保测量精度，除了保证硬件的信号采集速度外，一是在建筑物表面布置足够数量的测压点，二是对由连接压力模块的有线长度管路引起的信号畸变问题进行修正。现有的对测压管路修正的装置是在扬声器对面安装测压板，并在测压板中心部位安装两个测压点。现有的对测压管路修正的装置存在扬声器未固定在装置上，且无底板，实验时扬声器稳定性差，且不便改变扬声器与测压板之间的距离，采集的试验数据范围受限等缺陷。 At present, in order to ensure the measurement accuracy, in addition to ensuring the signal acquisition speed of the hardware, one is to arrange a sufficient number of pressure measurement points on the surface of the building, and the other is to correct the signal distortion caused by the wired length of the pipeline connecting the pressure module. The existing device for correcting the pressure measuring pipeline is to install a pressure measuring plate on the opposite side of the loudspeaker, and install two pressure measuring points at the center of the pressure measuring plate. The existing device for correcting the pressure measuring pipeline has defects such as the loudspeaker is not fixed on the device and has no bottom plate, the stability of the loudspeaker is poor during the experiment, and it is inconvenient to change the distance between the loudspeaker and the pressure measuring board, and the range of collected test data is limited. .
实用新型内容 Utility model content
本实用新型所要解决的技术问题是提供一种用于风洞试验测压管道修正的实验装置，采用该实验装置对风洞试验测压管道进行修正实验时，扬声器的工作稳定性好，扬声器与测压板之间的距离便于调节，实验数据的采集范围广。 The technical problem to be solved by the utility model is to provide an experimental device for the correction of the pressure measuring pipeline in the wind tunnel test. When the experimental device is used to modify the pressure measuring pipeline of the wind tunnel test, the working stability of the speaker is good, and the speaker and The distance between the pressure measuring plates is easy to adjust, and the experimental data can be collected in a wide range.
本实用新型解决其技术问题采用的技术方案是：一种用于风洞试验测压管道修正的实验装置，包括底板、信号发生器、功率放大器、扬声器、固定钢支架、活动钢支架，所述固定钢支架固定在所述底板上方，所述扬声器固定安装在所述固定钢支架上；所述扬声器与所述功率放大器通过导线相连，功率放大器与信号发生器通过导线相连；所述活动钢支架与所述固定钢支架平行相对放置，活动钢支架面向固定钢支架一侧设有测压孔板，所述测压孔板上设有两个以上测压点；所述活动钢支架背向固定钢支架一侧设有压力传感器模块，所述压力传感器模块与所述两个以上测压点分别通过一个或多个长的管路系统及一根短管相连；所述活动钢支架的底部设有滑轮结构，活动钢支架通过滑轮结构可移动地放置在所述底板上。 The technical solution adopted by the utility model to solve the technical problems is: an experimental device for wind tunnel test pressure measurement pipeline correction, including a base plate, a signal generator, a power amplifier, a loudspeaker, a fixed steel bracket, and a movable steel bracket. The fixed steel bracket is fixed above the bottom plate, and the loudspeaker is fixedly installed on the fixed steel bracket; the loudspeaker is connected to the power amplifier through wires, and the power amplifier is connected to the signal generator through wires; the movable steel bracket Placed parallel to the fixed steel bracket, the side of the movable steel bracket facing the fixed steel bracket is provided with a pressure measuring orifice, and the pressure measuring orifice is provided with more than two pressure measuring points; the movable steel bracket is fixed with its back facing A pressure sensor module is provided on one side of the steel support, and the pressure sensor module is connected to the two or more pressure measuring points through one or more long pipeline systems and a short pipe respectively; the bottom of the movable steel support is provided with There is a pulley structure, and the movable steel bracket is movably placed on the bottom plate through the pulley structure.
进一步，所述固定钢支架上设有形状与所述扬声器相适应的安装孔，所述扬声器固定安装在所述安装孔内；所述测压孔板为一块方形板，所述两个以上测压点均设在所述测压孔板的中心处；所述测压点与所述扬声器的中心位置处于同一水平直线上。 Further, the fixed steel bracket is provided with a mounting hole whose shape is suitable for the speaker, and the speaker is fixedly installed in the mounting hole; the pressure measuring orifice plate is a square plate, and the two or more pressure measuring holes The pressure points are all set at the center of the pressure measuring orifice; the pressure measuring points are on the same horizontal line as the center of the loudspeaker.
进一步，所述固定钢支架由一块顶板、两块侧面板和一块正面板焊接组合而成，所述安装孔开设在所述正面板上；所述活动钢支架由一块顶板、两块侧面板和一块正面板焊接组合而成，所述测压孔板固定安装在所述正面板上，所述滑轮结构设在所述两块侧面板底部；所述活动钢支架的正面板与所述固定钢支架的正面板平行相对放置。 Further, the fixed steel bracket is composed of a top plate, two side panels and a front panel by welding, and the installation holes are opened on the front panel; the movable steel bracket is composed of a top panel, two side panels and A front panel is welded and combined, the pressure measuring orifice plate is fixedly installed on the front panel, and the pulley structure is arranged at the bottom of the two side panels; the front panel of the movable steel bracket and the fixed steel bracket The front panels of the brackets are placed parallel and opposite to each other.
进一步，所述信号发生器、功率放大器均固定安装在所述底板上方。 Further, the signal generator and the power amplifier are fixedly installed above the bottom plate.
本实用新型的积极效果在于，采用本实用新型的实验装置对风洞试验测压管道进行修正实验时，扬声器的工作稳定性好，扬声器与测压板之间的距离便于调节，实验数据的采集范围广。 The positive effect of the utility model is that, when the experimental device of the utility model is used to modify the pressure measuring pipeline of the wind tunnel test, the working stability of the loudspeaker is good, the distance between the loudspeaker and the pressure measuring plate is easy to adjust, and the collection range of the experimental data wide.
附图说明 Description of drawings
图1为本实用新型一实施例的结构示意图。 Fig. 1 is a schematic structural view of an embodiment of the utility model.
图2为图1所示实施例的固定钢支架的正面板的结构示意图。 Fig. 2 is a schematic structural view of the front panel of the fixed steel bracket of the embodiment shown in Fig. 1 .
图3为图1所示实施例的活动钢支架的正面板的结构示意图。 Fig. 3 is a structural schematic diagram of the front panel of the movable steel bracket of the embodiment shown in Fig. 1 .
具体实施方式 Detailed ways
以下结合附图及实施例对本实用新型作进一步说明。 Below in conjunction with accompanying drawing and embodiment the utility model is described further.
如图1、图2、图3所示，本实用新型的实施例包括底板1、信号发生器2、功率放大器3、扬声器4、固定钢支架I、活动钢支架II。固定钢支架I固定在底板1的上方，固定钢支架Ｉ由一块顶板５、两块侧面板７和一块正面板６焊接组合而成。正面板６上设有形状与扬声器4相适应的安装孔，扬声器4通过螺栓16固定安装在安装孔内。活动钢支架II由一块顶板12、两块侧面板９和一块正面板11焊接组合而成。活动钢支架II的正面板11与固定钢支架Ｉ的正面板６平行相对放置。活动钢支架II的正面板11上设有测压孔板10，测压孔板10位于正面板11面向固定钢支架I一侧。测压孔板10为一块方形板，通过螺栓18固定在正面板11上。测压孔板10上设有两个测压点17，两个测压点17设在测压孔板10的中心位置处，测压点17与扬声器４的中心位置处于同一水平直线上。活动钢支架II背向固定钢支架I一侧设有压力传感器模块15，压力传感器模块15与两个测压点17分别通过一个长的管路系统14和一根短管13相连。两块侧面板９的底部设有滑轮结构８，活动钢支架II通过滑轮结构８可移动地放置在底板１上。扬声器4与功率放大器3通过导线相连，功率放大器3与信号发生器2通过导线相连，信号发生器2、功率放大器3均固定安装在底板1上方。 As shown in Fig. 1, Fig. 2, Fig. 3, the embodiment of the present utility model comprises base plate 1, signal generator 2, power amplifier 3, loudspeaker 4, fixed steel bracket I, movable steel bracket II. The fixed steel bracket I is fixed above the bottom plate 1, and the fixed steel bracket I is welded and assembled by a top plate 5, two side panels 7 and a front panel 6. The front panel 6 is provided with a mounting hole whose shape is suitable for the speaker 4 , and the speaker 4 is fixedly installed in the mounting hole by bolts 16 . The movable steel bracket II is composed of a top plate 12, two side panels 9 and a front panel 11 welded together. The front panel 11 of the movable steel bracket II is placed parallel to the front panel 6 of the fixed steel bracket I. The front panel 11 of the movable steel bracket II is provided with a pressure measurement orifice 10, and the pressure measurement orifice 10 is located at the side of the front panel 11 facing the fixed steel bracket I. The pressure measuring orifice plate 10 is a square plate fixed on the front plate 11 by bolts 18 . Two pressure measuring points 17 are arranged on the pressure measuring orifice 10 , and the two pressure measuring points 17 are set at the center of the pressure measuring orifice 10 , and the pressure measuring point 17 is on the same horizontal line as the center of the speaker 4 . A pressure sensor module 15 is provided on the side of the movable steel support II facing away from the fixed steel support I, and the pressure sensor module 15 is connected to two pressure measuring points 17 through a long pipeline system 14 and a short pipe 13 respectively. The bottom of the two side panels 9 is provided with a pulley structure 8, and the movable steel bracket II is movably placed on the bottom plate 1 through the pulley structure 8. The loudspeaker 4 is connected to the power amplifier 3 through wires, the power amplifier 3 is connected to the signal generator 2 through wires, and the signal generator 2 and the power amplifier 3 are fixedly installed above the base plate 1 .
工作原理 working principle
试验时剪去进入压力传感器模块15的多余连接管路，使短管13的连接长度尽可能短，以使管路在低频段有平坦的频率响应特性，可认为所测到的信号在低频段没有畸变就是被测物体表面的压力信号。同时，由于两测压点离得很近，可认为管路系统14与短管13的压力是一样的，这样用短管13测出的信号作为被测管路系统的输入信号，两个信号接入压力传感器模块15，用电子压力扫描阀系统进行精确的压力校准和数据采集。 During the test, cut off the excess connection pipeline entering the pressure sensor module 15, and make the connection length of the short pipe 13 as short as possible, so that the pipeline has a flat frequency response characteristic in the low frequency band, and it can be considered that the measured signal is in the low frequency band. No distortion is the pressure signal on the surface of the measured object. At the same time, because the two pressure measuring points are very close, it can be considered that the pressure of the pipeline system 14 and the short pipe 13 is the same, so the signal measured by the short pipe 13 is used as the input signal of the pipeline system under test, and the two signals The pressure sensor module 15 is connected, and the electronic pressure scanning valve system is used for precise pressure calibration and data acquisition.
信号发生器2产生正弦波通过功率放大器3驱动扬声器4发出正弦式压力波，对测压孔板10进行压力波激振，利用电子压力扫描阀系统进行压力校准和数据采集。采用声音振动原理，利用正弦式压力波作为外部激励，用多点联合扫描技术对不同管路的频响特性进行定量测试。 The signal generator 2 generates a sine wave and drives the loudspeaker 4 through the power amplifier 3 to emit a sine pressure wave, which excites the pressure wave on the pressure measuring orifice 10, and uses the electronic pressure scanning valve system for pressure calibration and data collection. Using the principle of sound vibration, using sinusoidal pressure wave as external excitation, the frequency response characteristics of different pipelines are quantitatively tested by multi-point joint scanning technology.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105628334A (en) * | 2016-03-25 | 2016-06-01 | 中南大学 | Aeroelastic model-based synchronous pressure measurement and vibration measurement system and realization method |
| CN109900451A (en) * | 2019-03-13 | 2019-06-18 | 广州大学 | The method for correcting the distortion of wind tunnel experiment pressure measuring model wind pressure signal |
| CN112197935A (en) * | 2020-10-19 | 2021-01-08 | 重庆大学 | Method for acquiring frequency response value at any frequency under any pipe length, pressure measuring pipeline correcting method and storage medium |
| CN113865787A (en) * | 2021-09-10 | 2021-12-31 | 华南理工大学 | A Time Domain Calibration Method of Pressure Measuring Pipeline Signals |
-
2014
- 2014-04-15 CN CN201420181572.XU patent/CN203824734U/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105628334A (en) * | 2016-03-25 | 2016-06-01 | 中南大学 | Aeroelastic model-based synchronous pressure measurement and vibration measurement system and realization method |
| CN109900451A (en) * | 2019-03-13 | 2019-06-18 | 广州大学 | The method for correcting the distortion of wind tunnel experiment pressure measuring model wind pressure signal |
| CN109900451B (en) * | 2019-03-13 | 2020-12-01 | 广州大学 | A Method of Correcting the Distortion of Wind Pressure Signals in a Wind Tunnel Experimental Manometric Model |
| CN112197935A (en) * | 2020-10-19 | 2021-01-08 | 重庆大学 | Method for acquiring frequency response value at any frequency under any pipe length, pressure measuring pipeline correcting method and storage medium |
| CN113865787A (en) * | 2021-09-10 | 2021-12-31 | 华南理工大学 | A Time Domain Calibration Method of Pressure Measuring Pipeline Signals |
| CN113865787B (en) * | 2021-09-10 | 2023-06-20 | 华南理工大学 | A Time Domain Calibration Method of Pressure Measurement Pipeline Signal |
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