CN201196565Y

CN201196565Y - Measuring apparatus for planting coverage

Info

Publication number: CN201196565Y
Application number: CNU200820080171XU
Authority: CN
Inventors: 杨胜天; 宋凯宇; 何亚琼; 李貌
Original assignee: Beijing Normal University
Current assignee: Beijing Normal University
Priority date: 2008-04-25
Filing date: 2008-04-25
Publication date: 2009-02-18
Anticipated expiration: 2018-04-25

Abstract

The utility model relates to a vegetation coverage measuring device. The vegetation coverage measuring device comprises a digital camera work platform, a support and a digital camera height adjusting system. The digital camera work platform is a rectangular box body, a square hole is arranged on one side face of the box body, and a circular hole is arranged on the bottom surface of the box body. A rigid fine line is connected with the upper part of the box body, and a fine line is also arranged on the edge of the bottom surface of the box body. The support comprises a steel bar, a long steel pipe and a short steel pipe. The two steel pipes respectively have boreholes, one end of the short steel pipe is sleeved on the steel bar, and the other end of the short steel pipe is connected with the long steel pipe through threads. The digital camera height adjusting system comprises two iron rings which are respectively fixed on the head end and the middle lower part of the long steel pipe, and a scaled rigid fine line. One end of the scaled rigid fine line which passes through the two iron rings is connected with the rigid fine line of the digital camera work platform, while the other end is grasped in the hands of an operator during work. The device can accurately obtain the measured data for the vegetation coverage on a sample site, ensures the stability of the digital camera platform and avoids the inference caused by slight weather conditions.

Description

A kind of measurement mechanism of vegetation coverage

Technical field

The utility model is a kind of measurement mechanism of vegetation coverage, belongs to physical geography systems technology field.

Background technology

Exist contact between vegetation and the many natural factor closely; along with the pay attention to day by day of the whole world for ecologic environment; vegetation state becomes the important evidence of regional climate research and ecological environmental protection, thereby makes the mutual relationship of vegetation and climatic factor become one of focus of Global Change and Terrestrial Ecosystem, GCTE research.Vegetation coverage is as the important parameter of weighing the vegetation growth situation, because traditional eye estimating method is easy to operate, the general field data of using eye estimating method to obtain vegetation coverage in working in the open air, yet prove through many scholar's research, the vegetation coverage data error that eye estimating method obtains is very big, and confidence level is very poor.Progress along with camera work, the method that the field obtains vegetation coverage has had new development, photography with digital camera, it is Close Up Photogrammetry, it utilizes charge-coupled image sensor, and (digital photograph that vegetation covers is obtained in ChargeCoup led Device, CCD) imaging, extract vegetation pixel on the photo by the threshold value of setting Red Green Blue (RGB), to account for the number percent of digital photograph total pixel number be vegetation coverage to the pixel count of vegetation in the photo.

The employed vegetation coverage deriving means of some scholars all designs voluntarily before, makes an easy support earlier, in order to support digital camera, as the platform that obtains digital photograph.Be used for the stock that carries the digital camera platform in this support and generally use fishing rod, the extended length of fishing rod is more considerable, and pliability is fine, but stability is very poor, need the stable of long time waiting digital camera platform when field survey, to obtain quality digital photograph preferably, efficient is lower like this, and this instability will be more obvious in that performance is arranged under the weather of wind.Secondly, the device that is used to place digital camera all hangs in the air, rocks easily, also is difficult to stablely when carrying out field survey, can greatly influence the quality of the digital photograph that is obtained, thereby influence measurement result.In addition, one end of support needs the people and is holding up when carrying out field survey, needs extra labour so on the one hand, also can influence the stability of device on the other hand.The problems referred to above need to be resolved hurrily.

Summary of the invention

The purpose of this utility model is to provide a kind of measurement mechanism of vegetation coverage, to solve defective of the prior art.

The utility model mainly comprises: digital camera workbench, support, digital camera height adjusting system.

Digital phase workbench is the rectangle box body of a papery or aluminium matter, and the box body size designs voluntarily according to the size of digital camera, and a box body wherein side is provided with a square hole, and the bottom surface is provided with a circular hole.Box body top respectively is connected with a rigidity fine rule for 4 jiaos, is used to hang box body.Wherein, the limit of box bottom is provided with 3 fine rules, stablizing when being used to guarantee camera work.

Support comprises a reinforcing bar, a long steel pipe and a short steel pipes, and two steel pipes are respectively equipped with some borings; Wherein short steel pipes one end is sheathed on the reinforcing bar, and the other end is spirally connected with long steel pipe; Wherein, described support can comprise further that two ends have the iron wire of little hook, and the boring of two steel pipes is caught at two ends respectively, is used for further fixing two steel pipes in certain angle, the height of camera when guaranteeing work.

The digital camera height adjusting system comprises: two iron hoops are individually fixed in long steel pipe head end and middle and lower part; A rigidity fine rule that has scale passes from described two iron hoops, and an end is connected with the rigidity fine rule of digital camera workbench, is held in hand by the staff during other end work.

The measurement mechanism of a kind of vegetation coverage of the utility model, its advantage and effect are: this device can accurately obtain the measured data of sampled point vegetation coverage; Its fine stability that guarantees the digital camera platform can be avoided the interference of slight meteorological condition (gentle breeze), obtains the digital photograph of vegetation coverage condition clearly.

Description of drawings

Fig. 1 is work whole structure figure of the present utility model;

Fig. 2 is digital camera workbench box body structure figure of the present utility model;

Fig. 3 is a digital camera platform and integrally design sketch of the present utility model;

Concrete label is as follows among the figure:

1, box body 2, rigidity fine rule 3, fine rule

41, short steel pipes 42, long steel pipe 5, boring

6, reinforcing bar 7, iron wire 8, scale rigidity fine rule

9, iron hoop 10, square hole 11, circular hole

Embodiment

The technical solution of the utility model is vertically taken pictures above vegetation for utilizing digital camera, on this basis the digital photograph that obtains is carried out Digital Image Processing, finally obtains the data of vegetation coverage.

Further specify the utility model below in conjunction with accompanying drawing.

1, is illustrated in figure 1 as work whole structure figure of the present utility model

At first reinforcing bar is pounded when carrying out work (mainly being to consider to make steel pipe to enter fixing relatively difficulty in the soil) in the ground, with short steel pipe socket on reinforcing bar, with long screw long steel pipe and short steel pipe are coupled together then, such two levers are just formed a lever.With the rigidity cord that has scale the camera workbench is connected, then the rigidity cord is passed the iron hoop of long steel pipe one end, another iron hoop from long steel pipe spreads out of, and survey crew is held an end of rigidity fine rule in hand.Adjust the angle of long steel pipe,, the little hook at iron wire two ends is hung respectively into two steel tube drillings, two steel pipes are fixed up, make between the two that angle remains unchanged, can make experimental provision when work, keep stablizing like this to reach the needs of image data.

The rigidity cord of Panasonic of elder generation band scale makes camera drop to minimum constructive height, at this moment writes down height, so just can control camera and rise to needed arbitrary height in the certain altitude scope.

At first that camera settings is good when carrying out digital photographing, can use time-lapse shooting, we can press the shutter of camera earlier like this, camera are pulled up to corresponding height again.At this moment, it is that camera platform settles out immediately that the ancillary staff gently draws the cord of camera platform side, so just can obtain vegetation clear photograph under the camera.

2, be illustrated in figure 2 as the utility model digital camera platform structure figure;

Digital camera is positioned in carton or the aluminium box, and the side of box is the fast aperture of door of digital camera, is the digital camera lens hole below the box.

3, be digital camera platform and integrally design sketch of the present utility model as Fig. 3

At first on 4 ribs of box, wear 4 rigidity fine rules, they are coupled together, the level of box when note guaranteeing to sling this moment.Wear 3 thin cotton threads in any 3 sides of box then.When digital camera rises to desired height, the light drawing-down line of three position-finding personnel, and then unclamp, make the digital camera workbench stable rapidly.In addition, when there is gentle breeze in the field, can pulls at fine rule slightly and make it keep stable.

Claims

1. the measurement mechanism of a vegetation coverage, it is characterized in that: this measurement mechanism comprises: digital camera workbench, support, digital camera height adjusting system;

Digital phase workbench is the rectangle box body, and a box body wherein side is provided with a square hole, and the bottom surface is provided with a circular hole; Box body top respectively is connected with a rigidity fine rule for 4 jiaos, and the limit of box bottom is provided with fine rule;

Support comprises a reinforcing bar, a long steel pipe and a short steel pipes; Two steel pipes are respectively equipped with boring; Wherein short steel pipes one end is sheathed on the reinforcing bar, and the other end is spirally connected with long steel pipe;

2. the measurement mechanism of a kind of vegetation coverage according to claim 1, it is characterized in that: described support can comprise further that two ends have the iron wire of little hook, the boring of two steel pipes is caught at two ends respectively, further fixes two steel pipes in certain angle.