Fool type tree electronic height measuring instrument and data acquisition and operation algorithm thereof

Abstract

The invention discloses a fool type tree electronic height measuring instrument and a data acquisition and operation algorithm thereof. Three keys refer to a special tip angle key, a stem distance keyand a base angle key which are installed on the height measuring instrument, and the data acquisition and operation strategy is a working strategy specially designed for the three-key type tree electronic height measuring instrument. By means of the electronic height measuring instrument, the tip angle, the stem pitch and the base angle parameters are allowed to be independently and instantly re-measured and updated in the measurement process, and the successive measurement sequences of the three parameters are not limited, so that the flexibility of the measurement process increased, the overall reworking frequency is greatly reduced, and the electronic height measuring instrument has great significance in further improving the working efficiency and enhancing the reliability of the highmeasurement result. Moreover, the electronic height measuring instrument is simple to operate and can be mastered easily, and can be used as an upgrading product of a traditional tree electronic height measuring instrument for popularization.

Description

technical field [0001] The invention belongs to the technical field of tree electronic altimeter, in particular to a fool-type electronic tree altimeter which is convenient to use under forest conditions and its data acquisition and calculation strategy. Background technique [0002] Forest survey is inseparable from the measurement of tree height. In this work, except for some young trees with low trunks, which can be measured with benchmarks, professional tree altimeters are required in most cases. At present, whether the altimeters used in forestry are mechanical or electronic, they are all designed according to the tangent theorem in the triangle relationship. The basic principle and algorithm are h=Ltanα( Image 6 ), the general principle and algorithm are h=L(tanα+tanβ)( Figure 7 ). The reason why there is an additional β angle parameter in the general algorithm is because Image 6 It is just an ideal state, but in reality, it is impossible for people to Image 6 Lie...

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Problems solved by technology

Figure 7 It is a general model diagram for tree height measurement, where h=L(tanα+tanβ)[Note: When β is represented by a negative number, the formula should be written as h=L(tanα-tanβ), which should be paid special attention to when writing operation programs ], it can be seen that in order to measure the tree height h, the measurement problem of the three basic parameters of L, α, and β must be solved first, and the mathematical relationship of the three parameters is fixed. In order to make the instrument have good operability, it is necessary to program the strategy. Otherwise, the instrument looks advanced, but it is actually impractical or inefficient in tree height measurement.

[0006] 2. The problem of immediate elimination, retest, and update of suspicious values ​​is the problem of reliability

The unreliable parameters may come from the following aspects: (1) The shrubs and leaves in the forest cause the laser signal to turn back in advance, which makes the measured value of L smaller; (2) The poor quality of the measurement key causes data leakage or re-input; ( 3) The angle measurement error is too large due to hand-held shaking, etc.

The existing altimeter data acquisition is a one-button operation sequential work, does not have the ability to independently update the suspicious data in the middle, and can only start from scratch, which not only affects work efficiency, but also encourages "make do with" when the number of rework is too high Thoughts, which in turn will bring hidden dangers to the reliability of the measurement results

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