High precision tree DBH measurer

Abstract

The invention discloses a high precision tree DBH (diameter at breast height) measurer, mainly comprising a fixing clamp, a measuring component and a processing circuit. Two symmetrical L-shaped aluminum sections in the fixing clamp are located on a same plane; a long pawl capacitive grating digital display caliper body and a support bar are fixed to two ends of the aluminum sections; four right angle positioning connecting pieces are installed at the ends of the capacitive grating digital display caliper body and the support bar to form a rectangular support. The center of one of the two L-shaped aluminum sections is grooved to cooperate with a rectangular rope, and is fixed by screws; an elastic fixing rope penetrates the rectangular rope and is fastened to a trunk. A U-shaped support is fixed to the center of the other L-shaped aluminum section; two rubber fixing blocks are fixed to two end faces of the U-shaped support through claw screws; a sensor support is installed at the center of the L-shaped aluminum section and is used for fixing an inductive displacement transducer. The high precision tree DBH measurer has the characteristics of high measuring resolution, and micrometer magnitude precision; meanwhile tree DBH static measurement and dynamic measurement are combined, thereby reducing measuring errors.

Description

technical field [0001] The invention belongs to the technical field of test and measurement, and in particular relates to a high-precision tree diameter measuring device. Background technique [0002] Tree diameter at breast height is the abbreviation of diameter at breast height, and it is one of the most basic factors in the determination of standing trees. The measurement and evaluation of forest volume, biomass and growth are all based on diameter at breast height. The trunk will periodically expand and contract according to the environment or its circadian rhythm, and these physiological activities directly reflect the physiological state of the trunk. Measuring the variation of tree diameter can directly reflect the growth status of plants. Therefore, the measurement of diameter at breast height plays an important role in forest resources monitoring. In addition, precise real-time measurement of tree diameter can provide data support for plant carbon sequestration an...

AI Technical Summary

Problems solved by technology

Fix the device at the measurement site, the data can be read directly and recorded automatically, but it can only measure the change in tree diameter instead of the absolute diameter and is expensive

Non-contact measuring devices are generally based on photoelectric and electromagnetic technologies, such as the RD1000 laser dendrometer, which has a built-in angular regularity program that can be used to measure cross-sectional area, diameter and tree height, and a built-in inclination sensor for tilt correction measurement. It can accurately collect the diameter of any part of the tree trunk. Although the non-contact measuring device is convenient to carry and the measurement is fast, the accuracy cannot meet the research requirements and the needs of real-time measurement

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