Device and method for measuring homologous dual-target transmission visibility
A measurement device and visibility technology, applied in the field of visibility detection, can solve the problems of window pollution, high requirements for optical axis alignment, etc., and achieve the effects of low installation and maintenance requirements, accurate visibility measurement, and easy operation
Active Publication Date: 2012-06-13
CMA METEOROLOGICAL OBSERVATION CENT
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Problems solved by technology
[0006] The purpose of the present invention is to provide a homologous dual-target transmission visibility measurement device and its measurement method, which can measure the visibility in real time and accurately, and solve the defects of the existing transmission visibility instruments, which have high requirements for optical axis alignment and are easily affected by window pollution. This in turn improves measurement accuracy and simplifies equipment maintenance
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[0030] Examples see figure 1 Shown, the structural representation of the present invention. This homologous dual-target transmission visibility measurement device includes a data acquisition unit, a data processing unit and a target unit. The data acquisition unit is provided with a camera 1, and the camera 1 is an industrial camera with a computer interface. The camera 1 is used to photograph the target unit directly in front of the lens, and transmits the captured image to the data processing unit. The signal output interface of the camera 1 is connected to one end of the data line, and the other end of the data line is connected to the data processing unit. Data input interface connection.
[0031] The data processing unit is a computer 2 that filters the collected images and performs operations on data parameters, and the computer 2 is a desktop computer or a portable computer. The computer 2 includes a filter processing unit for filtering the image collected by the came...
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The invention relates to a device for measuring homologous dual-target transmission visibility, which comprises a data acquisition unit, a data processing unit and a target unit; the data processing unit is a computer for filtering an acquired image and capable of operating data parameters; the target unit comprises a first camera bellows, a second camera bellows, an LED (Light Emitting Diode) light source, an optical splitter and optical fibres; both the first camera bellows and the second camera bellows are provided with two channel empty cavities which are same in shape, wherein one channel empty cavity is a bright cavity; the other channel empty cavity is a black cavity; the LED light source is split into two beams of light through the two optical fibres in the optical splitter; the two optical fibres are respectively put in the bright cavity of the first camera bellows and the bright cavity of the second camera bellows; and both a bright cavity port and a black cavity port are within a lens visual field of a camera. The device disclosed by the invention is smart in design, small in volume, low in manufacture cost, simple for installation, easy for operation, free from specialmaintenance cost and convenient for popularization and application. The device can also be used even in special weathers, such as a rainy day, a foggy day and the like.
Description
technical field [0001] The invention belongs to the field of visibility detection and relates to a device and method for measuring visibility. Background technique [0002] Atmospheric visibility occupies an important position in modern transportation and communication technology, and has always attracted people's attention. With the development of transportation networks, especially the development of expressways, water transportation, and aviation industries, it is necessary to monitor atmospheric visibility in real time and accurately judge Whether to close airports, highways or stop certain operations, etc. [0003] Real-time observation of visibility has become an indispensable and important content in real life. The so-called visibility refers to the maximum horizontal distance that a person with normal eyesight can distinguish a black target of a certain size (with an angle of view greater than 30') from the sky background near the horizon under the prevailing weathe...
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IPC IPC(8): G01N21/59
Inventor 毛节泰马舒庆杨玲毕务忠蔡青王中科甄小琼杜传耀
Owner CMA METEOROLOGICAL OBSERVATION CENT