Method for calibrating atmospheric transmissometer and atmospheric transmissometer
An atmospheric transmission and transmitter technology, applied in the field of visibility detection, can solve the problems of long time consumption and low alignment accuracy
Active Publication Date: 2020-10-09
BEIJING METABTAR RADAR
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Problems solved by technology
However, in the existing technical solutions, manual calibration is used to calibrate the transmitter and receiver. Technicians usually use buzzers to judge whether the transmitter and receiver are aligned, which not only takes a long time, but also has low alignment accuracy.
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[0087] figure 1 The working principle of atmospheric transmissometer measuring atmospheric visibility is shown. In the process of measuring the atmospheric visibility of the atmospheric transmissometer, the point light source at the focal point of the convex lens in the transmitting end (it can be a circuit-driven light-emitting diode with frequency modulation and amplitude modulation function, etc.) will emit signal light. After passing through the half mirror placed at an angle of 45 degrees, Half of the signal light is reflected by the half mirror, and the emitted signal light is detected by the photosensitive diode R1, and the other half of the signal light passes through the convex lens and is emitted parallel to the receiving end. The receiving end receives the parallel signal light attenuated by the atmosphere, and the photodiode R2 in the receiving end detects the parallel signal light passing through the convex lens, wherein the convex lens is located at the focal poi...
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Abstract
The embodiment of the invention discloses a method for calibrating an atmospheric transmissometer and the atmospheric transmissometer. Through a mobile receiving end and an emitting end, the calibration of the emitting end and the receiving end of the atmospheric transmissometer is realized; when the moved emitting end takes a photo on the receiving end, the practical coordinate of the center of afirst mark is positioned in a first theoretical coordinate; when the moved receiving end takes a photo on the emitting end, the practical coordinate of the center of a second mark is positioned in asecond theoretical coordinate; the result shows that the moved emitting end and the receiving end are positioned on the same straight line; the calibration of the emitting end and the receiving end can be realized. Therefore, compared with an artificial calibration method of the atmospheric transmissometer, the method has the advantages that the atmospheric transmissometer is calibrated by an image positioning method; the time consumption duration of the atmospheric transmissometer can be reduced; the calibration precision is higher.
Description
technical field [0001] The application relates to the technical field of visibility detection, in particular to a method for calibrating an atmospheric transmissometer and the atmospheric transmissometer. Background technique [0002] Atmospheric visibility is a physical quantity used to describe the transparency of the atmosphere from the perspective of whether the target can be seen and identified. It provides an important basis for weather forecasting, meteorological information, climate analysis, scientific research and meteorological services. [0003] In general, atmospheric visibility can be measured with an atmospheric transmissometer. When the atmospheric transmissometer measures the visibility of the atmosphere, the transmitting end will transmit a light intensity value of I to the receiving end 1 The parallel signal light, the parallel signal light is received by the receiving end, and the light intensity value of the received parallel signal light is I 2 , and...
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IPC IPC(8): G01N21/61
CPCG01N21/61
Inventor 于永鑫刘路路舒仕江贾兆荣杨建城
Owner BEIJING METABTAR RADAR