CN102466474A

CN102466474A - Method for measuring height of unreachable point tree

Info

Publication number: CN102466474A
Application number: CN2010105406969A
Authority: CN
Inventors: 冯仲科; 刘德庆
Original assignee: Beijing Forestry University
Current assignee: Beijing Forestry University
Priority date: 2010-11-12
Filing date: 2010-11-12
Publication date: 2012-05-23

Abstract

The invention discloses a method for measuring the height of an unreachable point tree. An angle is measured by adopting a total station, data are stored and processed in real time through a personal digital assistant (PDA), the horizontal distance between the total station and the center of a trunk is not required to be measured, and the influence of complex topographic conditions in forest regions is overcome by arranging the total station for real-time measurement twice on the same plumb surface and on different heights; and a precision angle measuring function of a full station type electronic speed measurement instrument and strong data processing and storage functions of the PDA are fully realized, all field observation data are stored by the PDA, and the height of the tree is calculated and stored in real time through a PDA compiled automatic calculating program, so that the monitoring precision is greatly improved, the workload is reduced and the working efficiency is improved.

Description

A kind of can not point of arrival height of tree method for measurement

One, technical field

The present invention relates in a kind of forest resource monitoring to measure the method for the height of tree, particularly a kind of can not point of arrival height of tree method for measurement.

Two, technical background

In traditional forest resource monitoring; The measurement of the height of tree is an insoluble problem always; Usually it is high to adopt height finder to survey; Eye estimating method or cooperate with tape measure, scale by box compass, transit is used the triangulated height method and is carried out the measurement of the height of tree, and above the whole bag of tricks all exists its shortcoming:

1. in the forest zone, cooperate with tape measure, scale, when application triangulated height method measures the height of tree, receive the restriction of factors such as landform, the gradient, the density of crop, make horizontal range be difficult to measure, limited the use of instrument by box compass, transit;

When 2. adopting height finder to measure the height of tree, data can't real-time storage with resolve, data are leaned on manual record, inefficiency, workload is big;

3. adopt eye estimating method, precision is lower.

So traditional height of tree measuring method is subject to the restriction of forest mesorelief complicated factor in the forest resource monitoring journey; And workload is big, automaticity is low, precision is not high; Therefore, quick, the high-acruracy survey of the realization height of tree become this area scientific and technical personnel problem anxious to be solved.

Three, summary of the invention

In order to overcome a lot of troubles that existing height of tree measuring method is brought in the forest resource monitoring process inevitably; Improve accuracy of observation and work efficiency; The purpose of this invention is to provide a kind of can not point of arrival height of tree method for measurement; Be implemented in quick, the high precision measurement that to measure the height of tree under the horizontal range condition, overcome the shortcoming that prior art exists.

The objective of the invention is to realize like this: adopt the total station survey angle; Through PDA (Personal Digital Assistant; The personal electric assistant) real-time storage and deal with data; Need not to measure the horizontal range of total powerstation, be employed in same vertical guide differing heights and settle for twice the method for total powerstation to realize the real-time measurement of the height of tree to the trunk center.

The method of wherein settling total powerstation to measure the height of tree twice at same vertical guide differing heights is following: at first, adopt total powerstation to record the observation sight line to the zenith distance V that sets the end ₁Reach zenith distance V to the treetop ₂Then, another settles total powerstation highly once more in the same vertical guide of settling for the first time total powerstation, records the observation sight line to the zenith distance V that sets the end ₃Reach zenith distance V to the treetop ₄At last, get the high difference h of instrument that settles total powerstation for twice with the tape measure amount, by digital-to-analogue

Try to achieve the height of tree

This invention compared with prior art has the following advantages:

1. adopt high-precision instrument of surveying and mapping total powerstation to carry out trees and highly measure, improved monitoring accuracy greatly;

When 2. measuring the height of tree, need not measure the flat distance at total powerstation to trunk center, having overcome in surveying the district has abrupt slope or gully can't measure the shortcoming of horizontal range;

3. adopt PDA to carry out data storage and calculating, can real-time resolving, reduced workload, improved work efficiency.

Four, description of drawings

Below in conjunction with accompanying drawing and embodiment the present invention is further specified.

Fig. 1 is that same vertical guide differing heights settles for twice total powerstation to measure height of tree synoptic diagram;

Five, embodiment:

Can not point of arrival height of tree method for measurement different with existing method, done significant improvement, specifically: adopt full site type electronic tachometer to take measurement of an angle; Through PDA real-time storage and deal with data; Need not to measure the horizontal range of total powerstation, adopt same vertical guide differing heights to settle the measurement of total powerstation for twice, simultaneously to the trunk center; Give full play to full site type electronic tachometer accurate angle measurement function and powerful data processing and the store function of PDA, gather and handle field data in real time.Embodiment is following:

1. in the topographic condition of forest zone complicacy; Surveying in the district has abrupt slope or gully can't measure under the situation of horizontal range, as shown in Figure 1: at first, and arrangement total powerstation in the more smooth zone of landform; The aiming tree end and treetop record the observation sight line respectively to the zenith distance V that sets the end ₁Reach zenith distance V to the treetop ₂Secondly, settle total powerstation to record the observation sight line once more at the same vertical guide differing heights of settling for the first time total powerstation to the zenith distance V that sets the end ₃Reach zenith distance V to the treetop ₄At last, utilize the tape measure amount to get and settle the high difference h of total powerstation instrument for twice; All observation datas are all imported among the PDA in real time and are stored, through digital-to-analogue

obtaining according to cosine law

H = \sqrt{{h_{1}}^{2} + {h_{3}}^{2} - 2 h_{1} h_{3} \cos (v 1 - v 2)}

Factorization in PDA calculates the height of tree and storage automatically by PDA.

Claims

One kind can not point of arrival height of tree method for measurement; Adopt the total station survey angle; Through PDA (Personal Digital Assistant; The personal electric assistant) real-time storage and deal with data is characterized in that: need not to measure the horizontal range of total powerstation to the trunk center, be employed in same vertical guide differing heights and settle for twice the method for total powerstation to realize the real-time measurement of the height of tree.
2. according to claim 1 a kind of can not point of arrival height of tree method for measurement, it is characterized in that: the method for wherein settling total powerstation to measure the height of tree twice at same vertical guide differing heights is following: at first, adopt total powerstation to record the observation sight line to the zenith distance V that sets the end ₁Reach zenith distance V to the treetop ₂Then, another settles total powerstation highly once more in the same vertical guide of settling for the first time total powerstation, records the observation sight line to the zenith distance V that sets the end ₃Reach zenith distance V to the treetop ₄At last, get the high difference h of instrument that settles total powerstation for twice with the tape measure amount, by digital-to-analogue

Try to achieve the height of tree