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Transmission-type visibility measuring device and measuring method

A measuring device and transmission type technology, applied in the direction of transmittance measurement, etc., can solve the problems of inaccurate measurement of the attenuation coefficient of the probe beam, measurement failure, etc., to improve long-term reliability, high long-term reliability, and suppress the influence of ambient temperature. Effect

Inactive Publication Date: 2009-09-09
NANJING UNIV OF INFORMATION SCI & TECH +1
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Problems solved by technology

Although the transmission method is the most accurate method, because the emission and measurement of the beam are separated by a long distance, the spot drifts on the receiving surface of the photodetector due to atmospheric disturbance, vibration of the measuring device, and terrain changes. , making the measurement of the attenuation coefficient of the probe beam on the propagation path inaccurate, or even cause the measurement to fail

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  • Transmission-type visibility measuring device and measuring method
  • Transmission-type visibility measuring device and measuring method
  • Transmission-type visibility measuring device and measuring method

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Embodiment Construction

[0027] Such as figure 1 , figure 2 , image 3 As shown, the transmissive atmospheric visibility measuring device of the present invention includes a transmitting part and a detecting part, and the detecting part includes a receiving unit, a photoelectric signal processing unit, a data acquisition unit 13 and a computer control unit 16, and the receiving unit adopts a four-quadrant photodetector 6. Sampling the converging light beams in four ways, dividing the azimuth into four quadrants, and outputting the detected beams in four ways. The signal output by the photoelectric signal processing unit is sent to the computer control unit 16 for processing through the data acquisition unit; the computer control unit 16 controls the central coordinates of the four quadrant photodetectors 6 .

[0028] The photoelectric signal processing unit includes: preamplifiers 21, 22, 23, 24, band-pass filter circuits 31, 32, 33, 34 and precision multipliers and π-type filter combinations 41, 4...

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Abstract

The invention provides a transmission-type atmospheric visibility measuring device which has long-term reliability and can accurately measure visibility, and a measuring method. The transmission-type atmospheric visibility measuring device comprises a transmission part and a detection part, wherein the detection part comprises a receiving unit, a photoelectric signal processing unit, a data collecting unit and a computer control unit; the receiving unit adopts four-quadrant photodetectors; the light beam of each photodetector is provided with a photoelectric signal processing unit; signals output by the photoelectric processing unit is transmitted to the computer control unit through the data collecting unit; and the center coordinate of the four-quadrant photodetectors is controlled by a computer.

Description

1. Technical field [0001] The invention designs an optical radiation receiving and measuring device, in particular a transmission type atmospheric visibility measuring device, which belongs to the extinction coefficient measurement and automatic tracking device when the optical radiation energy propagates in the atmosphere. 2. Background technology [0002] Atmospheric visibility plays an important role in atmospheric laser communication, image transmission and modern traffic technology. Visibility measurement has also been paid attention to by people. With the development of modern transportation network, especially the development of expressway, water transport and aviation industry, real-time monitoring of atmospheric visibility is required, and visibility measurement is becoming more and more important. The measurement of visibility relies on the measurement of the extinction coefficient of the beam. Typical measurement methods include forward scattering method and tran...

Claims

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Application Information

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IPC IPC(8): G01N21/59
Inventor 肖韶荣薛鸣方夏江涛赵静
Owner NANJING UNIV OF INFORMATION SCI & TECH
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