Circumference continuous measuring method and circumference continuous measuring device for circumference changing objects

Abstract

The invention relates to continuous, real-time and automatic measuring method and device of diameter at breast height of a tree. The device comprises a rack and a digital plate which is fixedly arranged on the tree. The measuring rack is arranged on the tree in a position where the circumference of the tree can be measured, and the rack can be extended along with the circumference of the measured object and further can be reduced along with the circumference of the measured object; a measuring ruler main body is made from a material which is substantially free of plastic deformation; the teeth of the rack are flexible teeth, and the rack is arranged on the tree in a position where the diameter at breast height of the tree is measured and surrounds the tree; one end of the rack is fixed while the other end is floating; a plurality of racks which are enough in length and are in a suspended state are arranged at the floating end; the digital plate is provided with a counting gear and the moving length of the rack is calculated by virtue of the number of teeth of the counting gear, so that the change of the diameter at breast height of the tree is calculated; the digital plate is provided with two conductive slide rails which are in intermittent concentric ring structures and contacts of conductive wafers are in contact with the conductive slide rails.

Description

technical field [0001] The invention relates to a method and device for continuously measuring the circumference of an object with variable radius, especially a method and device for continuously measuring the circumference of a variable-radius object, especially a method and device for measuring the circumference of a plant stem, especially for trees, converting the circumference into diameter at breast height Automatic monitoring method and device. Background technique [0002] In the field of agriculture and forestry, in the process of tree growth, tree diameter at breast height is an important indicator, which reflects the growth of trees. In the past, tree diameter at breast height was measured manually, which was time-consuming and troublesome. [0003] Most of the existing tree measurement methods use static measurement, which cannot be measured continuously and cannot record the complete data of the tree growth process. [0004] Due to the different measurement hab...

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Problems solved by technology

[0002] In the fields of agriculture and forestry, in the process of tree growth, tree diameter at breast height is an important indicator, which reflects the growth of trees. In the past, tree diameter at breast height was measured manually, which was time-consuming and troublesome.

[0003] Most of the existing tree measurement methods use static measurement, which cannot be measured continuously and cannot record the complete data of the tree growth process

[0004] Due to manual measurement, there are different measurement habits from person to person, which will introduce human error, and due to weather and other reasons, manual measurement of tree diameter at breast height cannot be guaranteed to be carried out continuously

Without continuous measurement, tree health problems cannot be diagnosed in time and can affect tree growth

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