CN103487041A - Standing tree counting and measuring method under arbor and shrub shielding condition - Google Patents

Abstract

The invention relates to a standing tree counting and measuring method under an arbor and shrub shielding condition. A forest measuring gun (handheld total station) serves as a tool, a novel counting method is designed, whether standing trees are counted or not under the arbor and shrub shielding condition is judged with the method, and related forest parameters are measured through accumulated count values. A practical and effective method for measuring the forest parameters under the shielding condition is provided, the measuring accuracy of the forest parameters under the shielding condition is greatly improved, and the defects that measurement cannot be performed or the measurement accuracy is low under the shielding condition, methods are simple and tedious in process, and accuracies cannot reach standards in forest measurement in the past are overcome.

Description

A kind of tall grass of filling with blocks the standing tree counting measuring method under condition

One, technical field

The present invention is that a kind of tall grass of filling with blocks the standing tree counting measuring method under condition, particularly utilizes the instrumentation of assize rifle (hand-held total powerstation) for the mean height of instrument.

Two, technical background

Traditional measuring forest technological means falls behind, and the handworks such as the angle gauge of take is measured, the interpretation of boat sheet are basis, blocks at Qiao Guancao that under condition, the data acquisition time is long, efficiency is low, poor operability, can not adapt to the demand to forest inventory investigation and detection.The domestic investigation for forest only is confined to take remote sensing and angle gauge investigation in conventional ground is the macroscopic view of major technique, extensive stage.Accurately measuring of some index, the problems such as the theory of obtaining as mean height, technology, instrument also are far from solving gratifying degree.

So the acquisition methods of traditional forest parameters etc. is subject to the forest mesorelief, tallly fills with the restriction that grass such as blocks mutually at the complicated factor in forest inventory investigation, make these data obtain that difficulty is large, working strength is large, precision is not high, therefore realizes that the tall grass of filling with blocks quick and precisely obtaining of forest parameters data under condition and becomes this area scientific and technical personnel major issue urgently to be resolved hurrily.The present invention is by using assize rifle (hand-held total powerstation), set up the tall grass of filling with and block standing tree counting measuring method under condition, carrying out to the data obtained processed effectively rapidly, and the field operation surveying work is alleviated as far as possible, sets up mathematical model, utilizes intelligent built-in computing module.General Promotion the speed of forest parameters data acquisition and processing, make its intellectuality and accuracy, effectively improved the particularly means of mean height measuring and calculating of forest parameters instrumentation technology.

Three, summary of the invention

Block at Qiao Guancao for overcoming traditional angle gauge measuring method that under condition, data acquisition cycle is long, efficiency is low, the shortcoming of poor operability, raise the efficiency, precision and operability, realize the accurately measuring of forest parameters, the invention provides a kind of standing tree counting measuring method that is instrument based on assize rifle (hand-held total powerstation), it is characterized in that: the assize rifle (hand-held total powerstation) of take is instrument, the tall accounter method of filling with under careless circumstance of occlusion condition of design, judge by the method whether standing tree is counted, by the stored count value, calculated relevant standing forest parameter.

Main summary of the invention:

1. the design of standing tree method of counting in the situation of plane;

2. the design of standing tree method of counting in three-dimensional situation;

3. the foundation of standing tree counting model under circumstance of occlusion;

This invention has the following advantages compared with the conventional method:

(1) improved the work efficiency of forest parameters instrumentation, traditional angle gauge is measured and can't be measured or low precision under the condition of blocking, and needs hand-kept in measuring process, then carries out interior industry calculating, the process complexity.The present invention directly measures and stores data by the assize rifle, after fieldwork observation by the assize rifle built-in calculated with mathematical model forest parameters.Intelligent, indoor and field integration have been realized.Alleviate to a certain extent the operation intensity of Forestry Investigation, expanded the business scope of instrument of surveying and mapping.

(2) realized the high-acruracy survey to mean height under the condition of blocking, traditional measuring method can't be measured under the condition of blocking, or method for measurement is comparatively simple, and error is large.Can realize the accurate measurement of mean height under the condition of blocking by the assize rifle, simple and efficient.

Four, accompanying drawing explanation

Below in conjunction with accompanying drawing and example, the present invention is further described.

Fig. 1 is counting principle in the situation of plane;

Fig. 2 is counting principle in three-dimensional situation.

Five, embodiment:

Based on assize rifle (hand-held total powerstation), for Qiao of instrument fills with grass, to block standing tree under condition counting measuring method different from existing method, specifically are:

1) plane counting: choose suitable observation station A as sampling point, use assize rifle (hand-held total powerstation) to be measured one tree; Take first observation wood and block wood as baseline, the B point of vertically getting d=1m place is another observation station, uses the distance measurement function B point of assize rifle to record second and observes wooden (C point) apart from S, by formula

Can determine new observation station A ', and then observe another block wooden D, try to achieve corresponding standing forest parameter value.

2) three-dimensional counting: choose suitable observation station A as sampling point, the inclination angle that use assize rifle (hand-held total powerstation) records first observation ebon tip place of blocking wooden back is δ, take first observation wood and block wood as baseline, the B point of vertically getting the d=1m place is another observation station, the inclination angle that records second observation wood (C point) treetop place is δ ', record ∠ ABC=β simultaneously, tried to achieve by formula tan δ '=tan δ sin β: δ=tan ^-1[tan δ '/sin β], pass through formula

can obtain the actual count value, and then try to achieve corresponding standing forest parameter value.

Claims (1)

1. fill with the careless standing tree counting measuring method blocked under condition for one kind tall, it is characterized in that: the assize rifle (hand-held total powerstation) of take is instrument, the tall grass of filling with of design blocks condition accounter model and method, judge by the method whether standing tree is counted, utilize the relevant standing forest parameter of stored count value measuring and calculating.Concrete steps are as follows:

1) plane counting: choose suitable observation station A as sampling point, use assize rifle (hand-held total powerstation) to be measured one tree; Take first observation wood and block wood as baseline, the B point of vertically getting d=1m place is another observation station, uses the distance measurement function B point of assize rifle to record second and observes wooden (C point) apart from S, by formula

can determine new observation station A ' and then observe another block wooden D, try to achieve corresponding forest parameters value.

2) three-dimensional counting: choose suitable observation station A as sampling point, the inclination angle that use assize rifle (hand-held total powerstation) records first observation ebon tip place of blocking wooden back is δ, take first observation wood and block wood as baseline, the B point of vertically getting the d=1m place is another observation station, the inclination angle that records second observation wood (C point) treetop place is δ ', record ∠ ABC=β simultaneously, tried to achieve by formula tan δ '=tan δ sin β: δ=tan ^-1[tan δ '/sin β], pass through formula

can obtain the actual count value, and then try to achieve corresponding forest parameters value.

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