Portable vegetation coverage measuring instrument

[0028] see figure 1 , figure 2 , image 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 As shown, a portable vegetation coverage measuring instrument is composed of a supporting pole 1, a main pole 2, a camera platform 3, and a digital camera 4. ( figure 1 )

[0029] The support rod 1 ( figure 2 ) Is a fork-shaped piece with a section of steel pipe on the top and two spikes on the bottom. It is used to fix the instrument on the ground. The two spikes on the bottom are easy to insert into the ground to keep the stability of the field instrument.

[0030] The main pole 2 is also a steel tube, which is used to raise the camera platform 3 to a certain height. Depending on the features, the main pole 2 can be extended. The main rod 2 and the support rod 1 are connected by a pin shaft.

[0031] The camera platform 3 ( image 3 ) Using the principle of a pan-tilt, it is composed of a downward semicircular ring 5, a horizontal circular ring 6 and a horizontal square frame 8. The upper rod of the semicircular ring 5 is connected to the top end of the main rod 2, and both ends of the semicircular ring 5 have a hole for two small pillars on the circular ring 6 to pass through and be fixed. In this way, it can be ensured that the circular ring 6 can freely rotate around the semicircular ring 5. On the circular ring 6, in the diameter direction perpendicular to the small pillars, two curved pillars 7 are welded, and the other end of the curved pillar 7 is connected with the midpoints of the two opposite sides of the square frame 8. On the other two opposite sides of the square frame 8, two sliding horizontal slide bars 9 are set. The width of the horizontal slide bars 9 can be adjusted according to the different models of the digital camera 4. The horizontal smoothing rod 9 is fixed on the square frame 8 by four screws. When the screws are not tightened, the horizontal sliding rod 9 can slide on the square frame 8 to adjust the level of the digital camera 4 in the direction perpendicular to the horizontal sliding rod 9. In order to ensure the stability of the digital camera 4, four hooks 10 are provided on the horizontal slide bar 9 to fix the digital camera 4 with rubber bands. In order to facilitate the adjustment of the level of the initial state of the plane, a rung 11 is added on each side of the four hooks 10 of the horizontal slide bar 9, and the level of the initial state can be adjusted by adjusting the position of the rung 11 and the position of the horizontal slide bar 9. In order to make it easier to see the level of the initial state, a horizontal bubble 12 is set at one corner of the square frame 8. When the bubble is in the center, the plane of the square frame 8 is horizontal.

[0032] references:

[0033] [1]Qin Wei, Zhu Qingke, etc. Research progress on vegetation coverage and its measurement methods[J]. Journal of Northwest Sci-Tech University of Agriculture and Forestry (Natural Science Edition). 2006, 09.

[0034] [2] Lu Bingjun, Liu Honghu, etc. Study on the accuracy of calculating vegetation coverage by the combination of photographic method and digital image technology[J]. Bulletin of Soil and Water Conservation, 2007, 01.

[0035] [3] Zhang Xuexia, Zhu Qingke, etc. Estimation of vegetation coverage by digital photography [J]. Journal of Beijing Forestry University. 2008, 01.