It mainly depends on the quality, whether the technical parameters are consistent, and whether the price is acceptable. It depends on the brand
I will give you some relative technical introduction and precautions
1. Principle of three-dimensional laser scanning
The three-dimensional laser scanning system is composed of a three-dimensional laser scanner, a digital camera, a scanner rotating platform, a software control platform, a data processing platform, a power supply, and other accessory equipment. , is a new spatial information data acquisition method that integrates a variety of high and new technologies. The working principle of the ground three-dimensional laser scanning system: first, the laser pulse signal is emitted by the laser pulse diode, passes through the rotating prism, and is directed to the target, and then passes through the detector to receive the reflected laser pulse signal, which is recorded by the recorder, and finally converted into It can directly identify the processed data information and realize entity modeling output through software processing.
2. Three-dimensional laser scanning workflow
The work process of applying three-dimensional laser measurement technology to collect data can be roughly divided into three parts: plan formulation, field data collection, and in-house data processing. Before starting the specific work, you first need to formulate a detailed work plan and do some preparatory work, which mainly includes: designing a suitable scanning route according to the different scanning objects and specific requirements for accuracy, determining the appropriate sampling density, and roughly determining the distance between the scanner and the scanner. The distance of the object, the number of stations, the approximate location of the stations, etc.; field work is mainly to collect data: it mainly includes data collection, on-site analysis to see whether the collected data generally meets the requirements, preliminary quality analysis and control, etc.; In-house data processing is the most important and the most workload-intensive part, mainly including: display of raw laser scanning data collected in the field, regular gridding of data, data filtering, classification, segmentation, data compression, and image processing , pattern recognition, etc.
3. Uses of 3D laser scanners
At present, the main uses of Riegl VZ-1000 3D laser scanner are digital cities, 3D architectural modeling, engineering surveying, terrain surveying, virtual Realistic and simulation visualization, mining area excavation section and volume measurement, industrial manufacturing, deformation measurement, processing inspection, construction control and measurement, accident investigation, investigation and restoration of historical monuments, and measurement of special animation effects, etc.
4. Description of the main uses of the three-dimensional laser scanner
The main uses of the three-dimensional laser scanner are:
(1) Use the three-dimensional laser scanner for related teaching Experiments are used to establish simple building models, understand the basic methods of field operations and internal data processing, enable one to master advanced measuring instruments, broaden one's knowledge, and lay the foundation for further research in the future.
(2) Use three-dimensional laser scanners to conduct various experimental projects based on the professional situation. For example, you can use instruments to conduct related experiments in deformation monitoring and obtain measurement data for related follow-up research.
(3) Conduct more in-depth theoretical research on the three-dimensional laser scanning system. For example, research on the working principle of three-dimensional laser scanners, research and development of related data processing software, research on theoretical methods of three-dimensional laser measurement systems, etc.
5. Operating rules
(1) You must participate in the operation training of the instrument provider and obtain a certificate before you can operate the instrument. When borrowing an instrument, the borrower must provide a training certificate and obtain a certificate from the operator. After confirmation by the instrument manager, the instrument manager can handle the borrowing procedures for the borrower. Those who have not obtained the certificate of qualification are not allowed to go through the borrowing procedures;
(2) The normal operating temperature of the instrument is 3~35 degrees Celsius. Here, This instrument must not be used in an environment outside the safe temperature;
(3) The external voltage of the instrument is 12V~24V, and other voltages must not be used to power the instrument to prevent burning the instrument;
(4 ) The instrument must not be carried while it is powered on, and must be turned off before being transported;
(5) When moving the instrument, it must be placed in the instrument box and checked to be correct before closing the box cover tightly before moving. The vibration of precision instruments will affect the data. The collection accuracy must be handled with care;
(6) The supporting cable interface of the instrument must be inserted and unplugged vertically and must not be rotated;
(7) Pay attention to the voltage of the power supply at all times.