CN-121994181-A - Scanning type particulate matter accumulation thickness measuring system and measuring method for wind tunnel test

CN121994181ACN 121994181 ACN121994181 ACN 121994181ACN-121994181-A

Abstract

The application provides a scanning type particulate matter accumulation thickness measuring system and a measuring method for wind tunnel tests. The scanning type particulate matter stacking thickness measuring system for the wind tunnel test comprises a measuring device, wherein the measuring device is arranged above a model to be measured, the measuring device comprises a guide structure, a telescopic structure and a ranging structure, the guide structure is arranged in the horizontal direction and can cover the model to be measured, a first end of the telescopic structure is movably connected with the guide structure to move along a preset track, a second end of the telescopic structure can reciprocate along the vertical direction, and the ranging structure is arranged at the second end and is used for measuring the vertical distance between different positions of the surface of the model to be measured and the ranging structure. The distance measuring structure is controlled to scan and measure the model to be measured along a preset track, and point-by-point difference value calculation is carried out on distance data before and after a wind tunnel test, so that the accumulation thickness distribution of the particulate matters can be obtained. The scheme realizes automatic, non-contact and continuous scanning measurement, and greatly improves the measurement efficiency and the measurement accuracy.

Inventors

XUE YUAN
TANG YI
YUE YUFEI
MA YUQI
XIA QIANJIN

Assignees

中国建筑科学研究院有限公司

Dates

Publication Date: 20260508
Application Date: 20260410

Claims (10)

1. The utility model provides a scanning type particulate matter pile-up thickness measurement system for wind tunnel test, is applied to the measurement to the model surface particulate matter pile-up thickness that awaits measuring, its characterized in that includes: Measuring device, measuring device can along vertical direction set up in the top of model that awaits measuring, include: The guide structure is arranged along the horizontal direction, and orthographic projection of the guide structure in the vertical direction can at least cover the model to be tested; The telescopic structure comprises a first end and a second end which are opposite, the first end is movably connected with the guide structure, so that the telescopic structure can move above the model to be tested along a preset track through the guide structure, and the second end can reciprocate along the vertical direction; The distance measuring structure is arranged at the second end and is used for measuring the distance between different positions on the surface of the model to be measured in the vertical direction and the distance measuring structure, and the distance measuring structure can be close to or far away from the model to be measured through the telescopic structure.
2. The scanned particulate matter buildup thickness measurement system for wind tunnel testing of claim 1 wherein, The guide structure comprises a first rail extending along a first direction, a second rail extending along a second direction, and a connecting piece; the second rail is slidably connected to the first rail, and the second rail can reciprocate relative to the first rail along the first direction; The connecting piece is connected to the second track in a sliding manner, the connecting piece can reciprocate relative to the second track along the second direction, and the first end of the telescopic structure is detachably connected with the connecting piece; the first direction and the second direction are arranged vertically in a plane parallel to a horizontal plane.
3. The scanning type particulate matter accumulation thickness measuring system for wind tunnel test as claimed in claim 2, The measuring device further includes: The first driving piece is arranged on the first track, and the first driving end of the first driving piece is connected with the second track and used for driving the second track to move relative to the first track; The second driving piece is arranged on the second track, and a second driving end of the second driving piece is connected with the connecting piece and used for driving the connecting piece to move relative to the second track; The third driving piece is arranged on the telescopic structure, and a third driving end of the third driving piece is connected with the second end of the telescopic structure and used for driving the second end to move so that the second end drives the ranging structure to move; The measuring system further comprises a control device which is respectively in communication connection with the first driving piece, the second driving piece and the third driving piece, and the control device is used for controlling the start, stop and rotating speed of the first driving piece, the second driving piece and the third driving piece.
4. A scanning type particulate matter accumulation thickness measuring system for a wind tunnel test as in claim 3, The distance measuring structure is a distance measuring sensor, the control device is in communication connection with the distance measuring sensor, and the control device can control the driving strokes of the first driving piece, the second driving piece and the third driving piece according to distance data measured by the distance measuring sensor.
5. The scanning type particulate matter accumulation thickness measuring system for wind tunnel test as claimed in claim 2, The first track comprises a plurality of first guide rails which are arranged at intervals along the second direction, the second track comprises a pair of second guide rails which are oppositely arranged along the first direction, and the second guide rails are respectively connected with the plurality of first guide rails in a sliding way; The connecting piece is arranged between the pair of second guide rails along the first direction, and two ends of the connecting piece are respectively connected with the pair of second guide rails in a sliding mode.
6. A scanned particulate matter buildup thickness measurement system for use in wind tunnel testing according to claim 3, wherein said measurement device further comprises: the first driving piece is connected with the hub through a first cable, the second driving piece is connected with the hub through a second cable, the third driving piece is connected with the hub through a third cable, the ranging structure is connected with the hub through a fourth cable, and the hub is connected with the control device through a fifth cable.
7. A method for measuring a thickness of a scanned particulate matter stack for a wind tunnel test, applied to the system for measuring a thickness of a scanned particulate matter stack for a wind tunnel test as claimed in any one of claims 1 to 6, comprising: Before wind tunnel test, controlling the telescopic structure to drive the ranging structure to move along the guiding structure along a first preset track so as to measure a plurality of preset positions of the model to be measured in an initial state and obtain first distance distribution data; starting a wind tunnel and carrying out a particulate matter accumulation test, and controlling the telescopic structure to drive the ranging structure to move along the guide structure along the first preset track again after the test is finished so as to measure a plurality of preset positions of the model to be tested in a particulate matter covered state again to obtain second distance distribution data; And calculating the point-by-point difference value of the second distance distribution data and the first distance distribution data to obtain the accumulation thickness of the particles on the surface of the model to be tested after wind tunnel test.
8. The method of measuring according to claim 7, wherein, The developing particulate matter accumulation test comprises a first working condition test and a second working condition test; under the first working condition test, carrying out particle accumulation operation on the model to be tested, carrying out blowing operation on the model to be tested, and controlling the distance measurement structure to move along the first preset track after the particle accumulation operation and the blowing operation are finished simultaneously to obtain second distance distribution data; Under the second working condition test, firstly, carrying out particle accumulation operation on the to-be-tested model, after the particle accumulation operation is finished, controlling the distance measurement structure to move along the first preset track to obtain second distance distribution data, then carrying out blowing operation on the to-be-tested model, after the blowing operation is finished, controlling the distance measurement structure to move along the first preset track again to obtain third distance distribution data, selecting smaller values of corresponding positions in the second distance distribution data and the third distance distribution data to form minimum distance distribution data, and carrying out point-by-point difference calculation on the minimum distance distribution data and the first distance distribution data to obtain extreme value thickness distribution of particle accumulation on the surface of the to-be-tested model after wind tunnel test.
9. The method of measuring according to claim 7, wherein, Before the control telescopic structure drives the ranging structure to move along the guiding structure along a first preset track so as to measure a plurality of preset positions of the model to be measured in an initial state, the telescopic structure is controlled to stretch and retract, so that the distance between the ranging structure and the surface of the model to be measured is in the middle of the effective measurement range of the ranging structure.
10. The method of measuring according to claim 9, wherein, The control telescopic structure drives the ranging structure to move along the guide structure along a first preset track so as to record the position information of the ranging structure in each preset position state in the process of measuring a plurality of preset positions of the model to be measured in an initial state; and then the telescopic structure and the ranging structure are detached from the guide structure, and after the wind tunnel test is completed, the telescopic structure and the ranging structure are connected with the guide structure, and the position of the ranging structure is corrected according to the position information.

Description

Scanning type particulate matter accumulation thickness measuring system and measuring method for wind tunnel test Technical Field The application relates to the technical field of wind tunnel tests, in particular to a scanning type particulate matter accumulation thickness measuring system and a measuring method for wind tunnel tests. Background The wind tunnel test is a key means for researching the engineering structure and the load characteristic thereof in wind environment, and in cold and arid areas, the wind-induced snow and sand accumulation have remarkable influence on the structural safety, operation and maintenance, so that the related load test becomes an important research direction. The spatial distribution of the snow depth and the sand accumulation thickness is a key parameter for evaluating wind-induced transportation, deposition rules and load effects. With the development of engineering design to refinement and quantification, in particular to the research of complex terrain and structural surfaces, higher requirements on measurement precision and spatial resolution are put forward. However, the existing manual insertion ruler or the estimation reading method is low in efficiency and high in labor intensity, the snow sand stacking body is inevitably disturbed in the insertion and extraction processes to damage the original deposition form, the test state is irreversibly changed to seriously interfere with the accuracy of subsequent continuous tests and repeated measurement, the non-contact methods such as optical image processing and the like are extremely easy to be limited by illumination conditions in a wind tunnel, surface reflection characteristics and algorithm stability, accuracy and reliability are often insufficient due to view angle shielding and error accumulation in a large scale ratio model test, and general mapping equipment such as a total station and the like is difficult to adapt to the requirements of limited internal space, complicated measurement posture and high-density scanning of the wind tunnel, and the measurement point layout and repeated positioning accuracy are limited to hardly meet the measurement requirements of high accuracy and high resolution. Therefore, there is a need for a scanned particulate buildup thickness measurement system and method for wind tunnel test to solve at least the above problems. Disclosure of Invention The embodiment of the application aims to provide a scanning type particulate matter accumulation thickness measuring system and a measuring method for a wind tunnel test, which are used for solving the problems of low efficiency, insufficient precision, poor repeatability and the like existing in the prior art when snow accumulation and sand accumulation thickness distribution measurement is carried out in a wind tunnel environment. In order to solve the technical problems, the embodiment of the application provides the following technical scheme: The application provides a scanning type particle stacking thickness measuring system for a wind tunnel test, which is applied to measurement of the particle stacking thickness of the surface of a model to be measured, and comprises a measuring device, a ranging structure and a telescopic structure, wherein the measuring device can be arranged above the model to be measured in the vertical direction, the guiding structure is arranged in the horizontal direction, orthographic projection of the guiding structure in the vertical direction can at least cover the model to be measured, the telescopic structure comprises a first end and a second end which are opposite, the first end is movably connected with the guiding structure, so that the telescopic structure can move above the model to be measured along a preset track through the guiding structure, the second end can reciprocate along the vertical direction, and the ranging structure is arranged at the second end and is used for measuring the distance between different positions on the surface of the model to be measured in the vertical direction and the ranging structure, and can approach or keep away from the model to be measured through the telescopic structure. In some embodiments of the application, the guide structure comprises a first rail extending along a first direction, a second rail extending along a second direction, and a connecting piece, wherein the second rail is connected to the first rail in a sliding manner, the second rail can reciprocate relative to the first rail along the first direction, the connecting piece is connected to the second rail in a sliding manner, the connecting piece can reciprocate relative to the second rail along the second direction, the first end of the telescopic structure is detachably connected with the connecting piece, and the first direction and the second direction are perpendicular to each other in a plane parallel to a horizontal plane. In some embodiments of the application, the measuring d