Sensor for measuring tree diameter at breast height

Abstract

The invention discloses a sensor for measuring tree diameter at breast height. A center shaft has one end provided with screw thread. A screw nut is secured is fixedly arranged on a housing. The center shaft is in threaded connection to the screw nut through the screw thread thereon. A gear is arranged at the other end of the center shaft. One part of a steel wire wraps around a center shaft steel wire wrapping column in single coil winding, the rest of the steel wire protrudes from the housing and wraps one turn around a to-be-tested tree. An external transmission shaft is in gear connection to the gear, and is in rack connection to a toothed sliding pole of a sliding resistor. If changes happed to diameter at breast height of the to-be-tested tree, the steel wire which wraps around the center shaft protrudes, stretches and drives the center shaft to rotate, which further drives the gear to rotate, the external transmission shaft is driven by means of rotation of the gear, the external transmission shaft drives the toothed sliding pole of the sliding resistor to slide, the toothed sliding pole slides and drives the resistance wire of the sliding resistor to change in length. The resistance wire changes along with the changes of tree diameter breast at height.

Description

technical field [0001] The invention relates to the field of forestry, in particular to a sensor for measuring the diameter at breast height of a tree. Background technique [0002] At the present stage, in the process of forestry resource inventory, the measurement of tree diameter at breast height is the most important part of the inventory. At present, in the process of measuring operations in our country, manual contact measurement methods are mainly used, mainly through manual measurement of diameter at breast height. , Generally, two people are required to carry out the measurement process at the same time, and one person measures and the other records. The measurement accuracy and measurement efficiency cannot be guaranteed, and the measurement efficiency is very low. Contents of the invention [0003] The present invention provides a sensor for measuring the DBH of a tree to overcome at least one problem existing in the prior art. [0004] To achieve the above obj...

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Problems solved by technology

[0002] At present, in the forestry resource inventory process, the measurement of tree diameter at breast height is the most important part of the inventory. At present, in the process of measurement operations in my country, manual contact measurement methods are mainly used, mainly through manual measurement of diameter at breast height calipers , the general measurement process requires two people at the same time, one person to measure and one person to record, the measurement accuracy and measurement efficiency cannot be guaranteed, and the measurement efficiency is very low

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