Standing tree laser scanning method based on three-dimensional laser scanning lifting platform

Abstract

The invention provides a standing tree laser scanning method based on a three-dimensional laser scanning lifting platform, and aims to solve the problems that scanning and measurement data precision of standing trees is not high, acquired optical images are dim. The standing tree laser scanning method based on the three-dimensional laser scanning lifting platform comprises the following steps: positioning a platform; starting a generator set; starting a computer and a three-dimensional laser scanning device; starting central control equipment; carrying out scanning operation and data storage; stopping and resetting; closing a system; and closing the computer and the generator set. The standing tree laser scanning method based on the three-dimensional laser scanning lifting platform has the beneficial effects that complete standing tree trunk surface morphology scanning point cloud data can be acquired, so that complete standing tree trunk surface three-dimensional images can be accurately restored in the computer, the working amount of later image stitching is reduced, and meanwhile, speed and stability of signal acquisition are increased.

Description

technical field [0001] The invention relates to the technical field of three-dimensional scanning, in particular to a laser scanning method for standing trees based on a three-dimensional laser scanning lifting platform. Background technique [0002] Forest resources are an important resource that is closely related to human production and life. How to rationally cultivate forest resources, especially artificial forest resources, and how to rationally and effectively utilize forest resources are important topics worth studying. Living trees generally refer to living trees in woodland, open woodland or scattered. The scientific evaluation of standing trees is helpful to judge the forest quality, and it is of great value to the protection and utilization of forest resources. As we all know, trees need to grow for a long period of time before reaching a diameter suitable for human use; in addition, trees are affected by climatic conditions, weather changes, human disturbance, ...

AI Technical Summary

Problems solved by technology

[0005] The present invention aims to solve a series of problems existing in the prior art that the accuracy of laser measurement data for standing trees is not high, the laser three-dimensional scanning of living trees cannot be performed, and the optical images obtained in the prior art are blurred, and further proposes A standing tree laser scanning method based on a three-dimensional laser scanning lifting platform, which has the following operation steps: S1, moving the living standing tree three-dimensional laser scanning lifting platform to the side of the living standing tree, the living standing tree three-dimensional laser scanning lifting platform has a base part, a lifting mechanism and a scanning platform, the lifting mechanism is installed on the base, the scanning platform is installed on the lifting mechanism, and the scanning platform can be horizontally lifted relative to the base by controlling the lifting mechanism Movement; the base part has an opening and the plane is a U-shaped plane, the base part includes a base body, a base left arm and a base right arm, and the base body is connected to the base left arm and the base respectively The right arm is connected, the left arm of the base is opposite to the right arm of the base and is not connected to each other, the opening is located between the left arm of the base and the right arm of the base; the scanning platform has at least A scanning entrance, the direction of the scanning entrance is the same as the direction of the opening; the opening of the base of the three-dimensional laser scanning lifting platform of the living tree is made to face the living tree; the left arm of the base and the right arm of the base are positioned between the two sides of the living tree Side; S2, start the generator set, the generator set is placed away from the three-dimensional laser scanning lifting platform of the living tree; the electric energy obtained by generating the generator set through the transformer is transmitted to the three-dimensional laser scanning lifting platform of the living tree, the computer and the three-dimensional laser scanning lifting platform through the conductive device Laser scanning device; S3, start the computer and the three-dimensional laser scanning device, the computer has a built-in three-dimensional laser scanning device control system; start the three-dimensional laser scanning device control system, set scanning parameters and issue scanning tasks for the three-dimensional laser scanning device Instruction; S4, start the central control device, and start the central processing unit through the man-machine interface control unit in the central control device, and set the scanning limit in the central processing unit; The scanning and lifting platform issues a starting command, and the three-dimensional laser scanning lifting platform of the standing tree is started, and the starting command is transmitted to the central processing unit through the data transmission unit, and the central processing unit drives the motor to move, and the motor passes through the coupling The elevator, the connecting rod and the steering gear drive a plurality of elevators to rotate synchronously. The elevator has a worm gear reduction mechanism, and the worm gear reduction mechanism includes a worm wheel and a worm. connected, the worm wheel and the worm mesh with each other, the worm wheel and the screw rotate simultaneously with the rotation of the worm, and the nut fixedly connected to the scanning platform rises or falls on the lifting rod with the rotation of the screw; The motor drives a plurality of elevators to rotate synchronously through a coupling, a connecting rod and a steering gear, and when the elevators rotate synchronously, the screw rod drives a plurality of nuts to move simultaneously, driving the scanning platform to rise horizontally or The level drops; the motor is equipped with an encoder, and the motor moves to drive the encoder to rotate at the same time. The encoder feeds back the information of the motor’s work to the computer through the data transmission unit, and the computer controls the three-dimensional laser scanning after obtaining the information of the motor’s work. The device starts scanning synchronously; the three-dimensional scanning data during the scanning process is transmitted to the computer in real time in the form of spatial coordinates and stored in the data storage device of the computer; S6. After the scanning platform reaches the scanning limit, it is automatically stopped under the control of the central processing unit; The nut and the scanning platform are lifted and stopped, and the encoder feeds back the stop information to the computer through the data transmission unit, and the computer controls the three-dimensional laser scanning device to stop scanning synchronously; the scanning and lifting platform is reset through the reset key of the central control device; S7. Turn off the control system of the three-dimensional laser scanning device in the central control equipment and computer;

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