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Instrument and method for measuring long-time-series field forest leaf area index (LAI)

A leaf area index, long-time series technology, applied in the field of forest ecological monitoring, can solve problems such as the inability to effectively obtain long-term series data, and achieve accurate and reliable measurement results, reasonable sampling intervals, and high costs.

Active Publication Date: 2015-02-18
NORTHEAST FORESTRY UNIVERSITY
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to solve the problem that the existing leaf area direct measurement method and indirect measurement method cannot effectively obtain long-term data

Method used

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  • Instrument and method for measuring long-time-series field forest leaf area index (LAI)
  • Instrument and method for measuring long-time-series field forest leaf area index (LAI)
  • Instrument and method for measuring long-time-series field forest leaf area index (LAI)

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Embodiment Construction

[0027] The specific embodiment of the present invention is described in conjunction with the accompanying drawings. A long-term sequence field forest leaf area index measuring instrument of this embodiment includes a waterproof casing, and the waterproof casing 1 includes a measurement part, a power supply part and a time control part , the measurement part includes a single-chip microcomputer 9, a horizontal rotation steering gear 12, a digital light sensor, a vertical rotation steering gear 11, a clock module 8, an SD card 7 and a display screen 6, and the vertical rotation steering gear 11 is installed on the horizontal rotation steering gear on the turntable of the machine 12 and rotate horizontally with the horizontal rotation steering gear 12, the digital light intensity sensor is installed on the vertical rotation steering gear 11, and rotates with the vertical rotation steering gear 11, the time control part includes a time control switch 15, The output port of the sing...

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Abstract

The invention relates to an instrument and method for measuring leaf areas, and provides an instrument and method for measuring a long-time-series field forest leaf area index (LAI). The instrument and method are used for solving the problem that an existing leaf area measuring method can not effectively obtain long-time-series data. A vertical rotation steering engine is arranged on a rotary table of a horizontal rotation steering engine and horizontally rotates along with the horizontal rotation steering engine, and a digital light intensity sensor is arranged on the vertical rotation steering engine; a time control part comprises a time control switch, the output port of a single chip microcomputer is connected with the horizontal rotation steering engine, the vertical rotation steering engine, an SD card and a display screen, the output end of the digital light intensity sensor is connected with the SDA port of the single chip microcomputer through a serial line, the output end of a clock module is connected with the SCL port of the single chip microcomputer through a serial line, and the output end of a power supply part is connected with the single chip microcomputer of a measuring part through the time control switch. The instrument is simple in structure, reasonable in design, and suitable for measuring the long-time-series field forest LAI.

Description

technical field [0001] The invention relates to a leaf area measuring instrument and a measuring method thereof, in particular to a long-time sequence field forest leaf area index measuring instrument and a measuring method, belonging to the technical field of forest ecological monitoring. Background technique [0002] Leaf area index (LAI) is half of the total leaf surface area per unit surface area, and is one of the important structural parameters of forest canopy. Accurately obtaining LAI is a research hotspot in recent years. Leaf is an important vegetative organ of plants. Most photosynthesis is completed in leaves. At the same time, transpiration is also realized through the stomata of leaves. It is the main organ for material and energy exchange between plants and the outside world. Therefore, LAI is a measure of plant Important parameters for carbon sequestration capacity and transpiration. Leaf area index has been considered as an important index to describe the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01B11/28
Inventor 范文义温一博常颖李明泽于宏洲张智超
Owner NORTHEAST FORESTRY UNIVERSITY
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