Give you some related technical introduction and matters needing attention.
1. Three-dimensional laser scanning principle
The 3D laser scanning system consists of 3D laser scanner, digital camera, scanner rotating platform, software control platform, data processing platform, power supply and other accessories. It is a new spatial information data acquisition method integrating various high technologies. The working principle of the three-dimensional laser scanning system on the ground is as follows: firstly, the laser pulse signal is emitted by the laser pulse diode and directed to the target through the rotating prism; Then, the reflected laser pulse signal is received by the detector and recorded by the recorder; Finally, it is converted into data information that can be directly identified and processed, and the entity modeling output is realized through software processing.
2.3D laser scanning workflow
The working process of collecting data by using three-dimensional laser measurement technology can be roughly divided into three parts: planning, field data collection and indoor data processing. Before the specific work is carried out, it is necessary to make a detailed work plan and do some preparatory work, which mainly includes: designing an appropriate scanning route, determining an appropriate sampling density, roughly determining the distance from the scanner to the scanned object, the number of stations, the approximate position of stations, etc. ; The field work is mainly to collect data, including data collection, on-site analysis of whether the collected data meets the requirements, preliminary quality analysis and control, etc. Indoor data processing is the most important and the biggest workload, which mainly includes: display of raw data of laser scanning collected in the field, regular gridding of data, data filtering, classification, segmentation, data compression, image processing, pattern recognition and so on.
The use of 3.3D laser scanner
At present, riegel VZ- 1000 3D laser scanner is mainly used in digital city, 3D building modeling, engineering survey, topographic and landscape survey, virtual reality and simulation visualization, mining area earthwork excavation section and volume measurement, industrial manufacturing, deformation measurement, processing detection, construction control measurement, accident investigation, historical site investigation and restoration, and special animation effect measurement.
4.3D laser scanner's main use description
The main purposes of 3D laser scanning are:
(1) Use the 3D laser scanner to carry out relevant teaching experiments, which are used to build simple building models, understand the basic methods of field work and indoor data processing, so as to master advanced measuring instruments, broaden their knowledge and lay a foundation for further research in the future.
(2) According to the professional situation, various experimental projects are carried out by using 3D laser scanner. For example, in deformation monitoring, instruments can be used to carry out related experiments, and the measured data can be obtained for related follow-up research.
(3) The 3D laser scanning system is studied theoretically. For example, the research on the working principle of three-dimensional laser scanner, the research and development of related data processing software, and the research on the theoretical method of three-dimensional laser measurement system.
5. Operating procedures
(1) Before operating the instrument, you must attend the operation training of the instrument supplier and obtain the certificate. When borrowing instruments, the instrument administrator must provide the borrower with a training certificate and confirm it by the instrument administrator before going through the borrowing procedures for the borrower. Those who have not obtained the qualification certificate shall not go through the borrowing procedures;
(2) The normal working temperature of the instrument is 3~35 degrees Celsius, and this instrument shall not be used in an environment outside this safe temperature;
(3) The external voltage of the instrument is 12V~24V, and no other voltage shall be used for power supply to avoid burning the instrument;
(4) The instrument shall not be carried with electricity, and can only be carried when the power supply is turned off;
(5) When the instrument moves, it must be placed in the instrument box, and it can be moved only after it is checked. The vibration of precision instruments will affect the accuracy of data acquisition and must be handled carefully;
(6) The cable interface of the instrument must be plugged and unplugged vertically and must not rotate;
(7) Pay attention to the voltage of the power supply.