Automatic leveling optical tree-angle measuring gauge

Abstract

The invention discloses an automatic leveling optical tree-measuring angle gauge, which is applied in forest survey. The automatic leveling optical tree-measuring angle gauge is provided with a cylindrical shell, two cylindrical ports are parallel planes forming a front observation window and a back observation window; the lower part of the inner side of the shell is fixedly provided with a wedge-shaped mirror, the cylindrical port on one side of the shell is provided with two cusp-shaped gaps, a connecting line of the two gaps is parallel to the upper plane of the wedge-shaped mirror; the top part of the shell is provided with a through hole, a button is arranged in the through hole, a vertical rod is hanged below the button, a vertical rod positioning plate which is parallel to the upper plane of the wedge-shaped mirror is arranged on the vertical rod, and a spring is arranged on the vertical rod positioning plate. The invention has the advantages of compact structure, small and flexible size, convenient carrying, simple operation, accurate measurement and easy implementation, and well solves the problem of automatic slope correction of the wedge-shaped mirror. When the invention is used for measuring a tree, the distance of distinct vision needs no adjustment, the location relationship of real images and virtual images can be easily interpreted, and the invention solves the problem of increased interpretation errors caused by eye fatigue as a result of frequent adjustment of the distance of distinct vision during the tree measurement of all angle gauges of the prior art.

Description

1. Technical field [0001] The invention relates to a tree measuring instrument for forest investigation, in particular to a tree measuring angle gauge capable of conveniently measuring forest stand basal area, stock volume, plant number per unit area and calculating average diameter and other forest stand investigation factors. 2. Background technology [0002] At present, there are roughly two types of tree measuring angle gauges used in the industry: one is the rod-type notch angle gauge that cannot be automatically leveled, which is composed of a thin metal sheet with a 1cm gap and a 50cm long rod. Its disadvantages: 1. One is that it cannot automatically correct the slope, which is particularly troublesome when used in mountainous areas; the other is that the target and the bayonet are not at the same clear vision distance, and the visual focus is frequently exchanged during judgment, resulting in blurred vision and large errors. The other is the rod-type self-leveling a...

AI Technical Summary

Problems solved by technology

[0003] In order to overcome the shortcomings of the existing tree measuring angle gauge, such as large interpretation errors, inconvenient carrying, and troublesome operation, the present invention provides a small size, easy to carry, simple operation, automatic leveling, and the measured tree trunk and the virtual image of the tree trunk in the same photopic view Optical dendrometer angle gauge with accurate distance reading

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