Laser rangefinder selection and measurement principles
Measurement principles and methods of action
With the development of science and technology, it seems that most people still don't know about laser rangefinders and don't understand laser rangefinders. Some workers even use tape measures to measure distances, and pens to calculate areas, volumes, etc. Next, I will introduce the principle and usage of the laser rangefinder, which allows workers to work and study with high efficiency and precision.
A laser rangefinder is an instrument that uses laser light to accurately measure the distance to a target. When the laser rangefinder is working, it emits a very thin laser beam towards the target. The photoelectric element receives the laser beam reflected by the target. The timer measures the time from emission to reception of the laser beam and calculates the distance from the observer to the target.
If the laser is emitted continuously, the measuring range can reach about 40 kilometers, and the operation can be carried out day and night. If the laser is pulse-emitted, the accuracy is generally lower, but when used for long-distance measurements, good relative accuracy can be achieved.
Main categories
One-dimensional laser range finder is used for distance measurement and positioning;
Two-dimensional laser rangefinder (Scanning Laser Rangefinder) is used in contour measurement, positioning, area monitoring and other fields;
3D Laser Rangefinder is used in three-dimensional contour measurement, three-dimensional space positioning and other fields.
1. What is the principle of using infrared ranging or laser ranging?
The principle of ranging can basically be summarized as measuring the time it takes for light to return to the target, and then calculating the distance D through the speed of light c =299792458m/s and the atmospheric refractive index n. Since it is difficult to directly measure time, the phase of a continuous wave is usually measured, which is called a phase-measuring distance meter. Of course, there are also pulse rangefinders..
