Laser rangefinder is a measuring instrument that uses laser to measure
distance. It is mainly used in military and industrial fields. It has the
advantages of fast measurement and accurate measurement, but it also has the
disadvantage of being afraid of water and dust, and it is dangerous to use. When
using a laser rangefinder, the accuracy is a very important parameter. Depending
on the measurement method, the accuracy of the laser rangefinder will also vary,
generally up to ±1 mm, and a good laser rangefinder has higher accuracy. Let's
take a look at what a laser rangefinder is.
1. What is a laser rangefinder?
The laser rangefinder is an instrument that uses a certain parameter of the modulated laser to realize the distance measurement of the target. It was invented by Maiman, a scientist of the Hughes Aircraft Company in the United States, in 1960, and began to be used in the military field in 1961. The price of rangefinders has been continuously reduced, and the industry has gradually begun to use laser rangefinders.
With the development of laser rangefinders, it is widely used in various fields, including terrain measurement, battlefield measurement, ranging of tanks, aircraft, ships and artillery to targets, measurement of cloud layers, aircraft, missiles and the height of artificial satellites, etc.; In industry, it is mainly used in industrial measurement and control, mines, ports and other fields.
2. What is the general accuracy of the laser rangefinder?
A laser rangefinder is a measurement tool, and accuracy is an important performance indicator. The measurement accuracy of the laser rangefinder generally refers to the specified measurement error based on the ordinary measurement environment, so is the laser rangefinder high accuracy?
There are two ways to use laser rangefinders: pulse method and phase method. Laser rangefinders emitted by pulses generally have low absolute accuracy, but for long-distance measurement, they can achieve good relative accuracy; phase test laser rangefinders The accuracy of the instrument can reach ±1mm.
It should be noted that the error in the accuracy of the laser rangefinder is not proportional to the measured distance, and it is the same over the entire distance, but if the distance is too long, the error will increase by ±0.5mm/100m.
Third, the advantages and disadvantages of laser rangefinder
1. Advantages of laser rangefinders
The sensor of the laser rangefinder is just a spot, whether it is a small hole or a distant object, it can be used, and the response time of the laser is very fast, so it can be used for fast measurement, and is not affected by the target object. Influence of material, color, tilt, etc., to achieve accurate measurement.
2. Disadvantages of laser rangefinders
If there is water and ash on the surface of the laser rangefinder, the light will be emitted back, resulting in false signals; and the laser is harmful to the human eye, and it is dangerous to use.