Airflow test method, airflow test apparatus and clean room control system

Patent metadata

Field	Value
Publication number	US-10139426-B2
Application number	US-201514803890-A
Country	US
Kind code	B2
Filing date	Jul 20, 2015
Priority date	Dec 3, 2014
Publication date	Nov 27, 2018
Grant date	Nov 27, 2018

Abstract

The present invention provides an airflow test method comprising: setting a plurality of test points within a test space; detecting the respective one-dimensional velocities of the airflow at each test point along a plurality of test directions, said plurality of test directions including at least three directions; calculating the actual direction and the actual velocity of the airflow at each test point based on the respective one-dimensional velocities of the airflow at the test point along the plurality of test directions. Also, the present invention provides an airflow test apparatus and a clean room control system. The present invention enables detecting the distribution of airflow in the test space with simple method.

First claim

The invention claimed is:

1. An airflow test method, comprising steps of:
establishing a three-dimensional reference coordinate system in a test space,
setting a plurality of test points within the test space;
detecting respective one-dimensional velocities of the airflow at each test point along a plurality of test directions, said plurality of test directions including directions of coordinate axes of the three-dimensional reference coordinate system; and
calculating an actual direction and an actual velocity of the airflow at each test point based on the respective one-dimensional velocities of the airflow at the test point along the plurality of test directions.

2. The airflow test method of claim 1 , wherein the step of calculating the actual direction and the actual velocity of the airflow at each test point based on the respective one-dimensional velocities of the airflow at the test point along the plurality of test directions includes:
determining an intermediate direction and an intermediate velocity of the airflow at the test point based on the one-dimensional velocities along directions of any two coordinate axes of the three-dimensional reference coordinate system; and
calculating the actual direction and the actual velocity of the airflow at the test point based on the one-dimensional velocity along the direction of a third coordinate axis of the three-dimensional reference coordinate system and the intermediate velocity of the airflow along the intermediate direction.

3. The airflow test method of claim 1 , wherein after the step of calculating the actual direction and the actual velocity of the airflow at each test point based on the respective one-dimensional velocities of the airflow at the test point along the plurality of test directions, the method further comprises:
plotting an airflow distribution graph according to the coordinate values for the respective test points and the actual direction and the actual velocity of the airflow at each test point.

4. The airflow test method of claim 3 , wherein the airflow distribution graph includes:
a two-dimensional distribution graph including projection points of the plurality of test points on a same plane, wherein each projection point is marked by using a two-dimensional graphic mark of various colors, the two-dimensional graphic marks of a same color are used for the test points having the same height, the two-dimensional graphic mark corresponds to the actual direction and the actual velocity of the airflow at the test point; and/or
a three-dimensional distribution graph including a plurality of test points, wherein each test point is marked by using a three-dimensional graphic mark corresponding to the actual direction and the actual velocity of the airflow.

5. An airflow test apparatus comprising:
a detection module configured for detecting respective one-dimensional velocities of the airflow at each of a plurality of test points in a test space along a plurality of test directions, said plurality of test directions including directions of coordinate axes of a three-dimensional reference coordinate system in the test space; and
a processing module configured for calculating an actual direction and an actual velocity of the airflow at the test point based on the respective one-dimensional velocities of the airflow at each test point along the plurality of test directions.

6. The airflow test apparatus of claim 5 , wherein the detection module comprises any one of an impeller anemometer, acoustic anemometer or thermal anemometer.

7. The airflow test apparatus of claim 5 , wherein the processing module comprises:
a storage unit, in which a function for calculating the actual direction and the actual velocity of the airflow at each test point based on the respective one-dimensional velocities of the airflow at the test point along the plurality of test directions is stored in advance; and
a computing unit, which utilizes the function to calculate firstly an intermediate direction and an intermediate velocity of the airflow at the test point based on the one-dimensional velocities along directions of any two coordinate axes of the three-dimensional reference coordinate system, and then calculate the actual direction and the actual velocity based on the one-dimensional velocity along the direction of a third coordinate axis of the three-dimensional reference coordinate system and the intermediate velocity of the airflow along the intermediate direction.

8. The airflow test apparatus of claim 7 , wherein the detection module is configured for detecting the coordinate values of the test point, and the processing module further comprises a graph generation unit which generates an airflow distribution graph according to the coordinate values for the respective test points and the calculation results of the computing unit; and
the airflow test apparatus further comprises a display module for displaying the airflow distribution graph generated by the graph generation unit.

9. The airflow test apparatus of claim 8 , wherein the airflow distribution graph includes:
a two-dimensional distribution graph including projection points of the plurality of test points on a same plane, wherein each projection point is marked by using a two-dimensional graphic mark of various colors, the two-dimensional graphic marks of a same color are used for the test points having the same height, the two-dimensional graphic mark corresponds to the actual direction and the actual velocity of the airflow at the test point; and/or
a three-dimensional distribution graph including a plurality of test points, wherein each test point is marked by using a three-dimensional graphic mark corresponding to the actual direction and the actual velocity of the airflow.

10. A clean room control system comprising the airflow test apparatus of claim 5 and a dust detection apparatus.

Assignees

• Boe Technology Group Co Ltd
• Hefei Xinsheng Optoelectronics Technology Co Ltd

Inventors

• Li Qian
• Wang Xiaolei
• Huang Daowu
• Du Sheng

Classifications

• G01P5/001

  Full-field flow measurement, e.g. determining flow velocity and direction in a whole region at the same time, flow visualisation · CPC title

• G01P13/045 Primary

  with speed indication · CPC title