Thermal infrared downlink radiation measuring device and measuring method thereof

Abstract

The invention provides an environmental thermal infrared irradiance measuring device and a measuring method thereof. The measuring device includes a matte gold plated cover plate, thermocouple placing grooves, thermocouple sensors, a water container, a main engine of a thermocouple temperature measuring instrument, and a thermal infrared radiometer, wherein the thermocouple placing grooves are milled and formed in the lower surface of the matte gold plated cover plate, and are provided with downward openings; the thermocouple sensors are placed in the thermocouple placing grooves; the matte gold plated cover plate is arranged at the top of the water container; the top ends of the thermocouple placing grooves are lower than the upper edge of the water container; and the thermocouple sensors are electrically connected with the thermocouple temperature measuring instrument. The measuring method includes the steps of: collecting and calculating the black-body radiation on the upper surface of the matte gold plated cover plate through thermocouples; measuring the emergent radiancy of the matte gold plated cover plate through the infrared radiometer; and obtaining the sky thermal infrared downlink radiation or the environmental thermal infrared irradiance via the conversion formula. The device is the only device for directly measuring the sky hemisphere integral downlink radiation, and the precision in temperature measurement for the outer surface of the naked matte gold plated cover plate is greatly improved.

Description

technical field

[0001] The invention belongs to the field of quantitative infrared remote sensing detection, and in particular relates to a thermal infrared downlink radiation measuring device and a measuring method thereof. Background technique

[0002] Thermal infrared downlink radiation is divided into the following two types,

[0003] 1) Sky thermal infrared downlink radiation;

[0004] The measurement device is set in an unshielded environment, and there are no tall buildings and trees around the measurement device. The thermal radiation measured in this environment is called sky thermal infrared downlink radiation.

[0005] 2) Environmental irradiance;

[0006] The measurement device is set in a canopy environment, that is, there is a shelter between the measurement device and the sky. The thermal radiation measured at this time is called the ambient irradiance, which includes the thermal infrared downlink radiation of the sky and the downlink of surrounding canopy o...

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