Southern camphor tree leaf equivalent water thickness measuring device and spectrum inversion method

Abstract

The invention discloses a southern camphor tree leaf equivalent water thickness measuring device and a spectrum inversion method, and belongs to the technical field of leaf equivalent water thickness measurement, the southern camphor tree leaf equivalent water thickness measuring device comprises a field spectral radiometer, a leaf area measuring instrument, an analytical balance, a leaf fresh-keeping device and a leaf drying and rapid cooling device, the leaf fresh-keeping device comprises a fresh-keeping box body, a leaf preservation box, water sponge and a water tank are movably arranged in the preservation box body; the drying and rapid cooling device comprises a drying box body, a partition plate is transversely arranged in the drying box body, a stepping motor is arranged on the partition plate, the top end of a vertically-upward output shaft of the stepping motor is connected with a blade containing assembly, an air outlet is formed in a top cover of the drying box body, and the air outlet is connected with a dehumidification device through a dehumidification air inlet pipe. The dehumidification air outlet pipe is connected with an air heater and an air cooler, air outlet pipes of the air heater and the air cooler are connected with a second connecting pipe, and a plurality of exhaust pipes are arranged on the second connecting pipe and penetrate through the through holes in the partition plate to exhaust air in the drying box body.

Description

technical field [0001] The invention relates to the technical field of blade equivalent water thickness measurement, in particular to a measurement device and a spectral inversion method for the equivalent water thickness of a southern camphor tree blade. Background technique [0002] Camphor trees are native to Vietnam, Japan, southern China and other places. Domestic camphor trees are mainly distributed in the south of the Yangtze River Basin, with the most in southern regions such as Jiangxi, Zhejiang, Taiwan, Guangdong, Fujian, and Hunan. It is mostly born on the sunny slopes, hills and valleys of low mountains, and its vertical distribution is mostly below 500~600m above sea level. It is an important tree species in my country's subtropical evergreen broad-leaved forests. Camphor tree is an evergreen tree with a height of up to 40 meters, exuding the unique fragrance of camphor tree. Camphor tree, as a fast-growing, perennial green, lush and beautiful tree, is usually ...

AI Technical Summary

Problems solved by technology

The main difference between the three expression methods is that they have different sensitivities to different vegetation moisture indices, so they are suitable for different inversion models, and there is essentially no difference between good and bad.

[0009] At present, during the measurement process, it is necessary to go outdoors or even in the field to pick leaf samples. When the leaf samples are brought back to the laboratory, they are only temporarily stored in ordinary plastic boxes. The greater the influence of fresh weight, the greater the error caused to the measurement and calculation; in addition, because the leaves need to be dried, the current measurement process usually uses natural cooling to room temperature after the leaves are dried, which requires a long cooling time and It is easy to absorb moisture in the air during the cooling process, which increases the error in the final measurement data of the dry weight of the leaves

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