A field real-time calibration method and device for a ground-based infrared cloud measuring instrument based on external double blackbodies

Abstract

The invention discloses an outdoor real-time calibration method based on double external black bodies and applied to a foundation infrared ceilometer. According to the outdoor real-time calibration method based on the double external black bodies and applied to the foundation infrared ceilometer, two planar black body radiation source assemblies are adopted, one black body is kept in the normal temperature state through a temperature control assembly, and the other black body is kept in the high temperature state through the temperature control assembly; the two black bodies are located on the two sides of an optical machine assembly of the foundation infrared ceilometer respectively; before observation, the optical machine assembly is rotated by the foundation infrared ceilometer, so that infrared radiation values of all detection units of one black body are acquired by a non-refrigeration infrared focal planar array, then the optical machine assembly is rotated again, so that infrared radiation values of all detection units of the other black body are acquired, and real-time calibration is conducted by solving a calibration model; before observation conducted through the foundation infrared ceilometer, one black body is kept in the normal temperature state through the temperature control assembly, the other black body is heated to be in the high temperature state, and the temperature difference between the two black bodies is not smaller than 20 DEG C. According to the outdoor real-time calibration method based on the double external black bodies and applied to the foundation infrared ceilometer, a real-time calibration coefficient is solved through the outdoor real-time calibration model and is stored in a corresponding storage unit.

Description

technical field [0001] The invention belongs to the field of ground meteorological observation, and in particular relates to a field real-time calibration method and mechanism of a ground-based infrared cloud measuring instrument based on external double blackbodies. Background technique [0002] The ground-based infrared nephelograph using the uncooled infrared focal plane array cloud measurement technology has realized the monitoring of continuous clouds in the whole sky day and night, and greatly improved the automatic observation level of ground clouds. The instrument realizes long-term observation in the field through patents such as CN100510781C and CN101089657B. In actual work, the ground-based infrared nephelograph establishes a radiation calibration method through a single internal calibration blackbody, which ensures the stable operation of the equipment to a certain extent. However, as the equipment is observed in the field for a long time, affected by factors su...

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Problems solved by technology

[0003] The purpose of the present invention is to propose a method and mechanism for field real-time calibration of a field-based infrared nephelometer for the lack of self-calibration capabilities of the current ground-based infrared nephelometry and the drift of radiation measurement results caused by long-term field work. Reduce the frequency of manual calibration of cloud measuring equipment

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