There are a few things you need to consider when purchasing a laser rangefinder.
1. Measurement plan.
2. Measurement accuracy.
3. Place of use.
The basis is divided into the following situations:
a) The distance measurement only needs to be within a few meters or ten meters, and the accuracy requirement is not high. It is recommended to choose "Ultrasonic Range Finder" (the basics are now out). The measurement effect of whitening-ultrasonic range finder is greatly affected by the environment, and its stability and directionality are worse than that of laser range finder, but the price is relatively cheap, and it is suitable for indoor measurement.
b) The measurement distance is not long, and it is mostly used indoors with high precision requirements.
A "Handheld Laser Rangefinder" is available for purchase. Filler - The handheld laser rangefinder is suitable for indoor use, and the measurement accuracy and effect are very good. (If the user needs to conduct exploration in an outdoor environment, it is recommended to equip a professional laser sight and reflector, and use it in combination to achieve the expected range and effect.
c) The measurement distance is relatively long, and it is mostly used in the field. Suggestion - buy a "telescope laser rangefinder" (i.e. a laser rangefinder telescope)
Current status and development trends of handheld laser rangefinders.
This is an era of rapid technological development, and people's lives are increasingly dependent on technology. Take the laser rangefinder as an example. In the past, people used tape measure, off-line, measuring, etc. to measure distance. Now just press a button on this little laser rangefinder and it's over. Moreover, the laser range finder has higher precision and smaller volume than traditional measuring methods. Light weight and easy to carry.
Due to the wide range of applications, the opening of laser rangefinders is overwhelming. At present, the laser range finders in shopping malls include pulse laser range finders and phase laser range finders. While both are used to measure distance, they have their own benefits. At the same time, the measurement plan accuracy of the pulse laser range finder is poor, and the measurement plan of the phase laser range finder is small, but the accuracy is high, which can reach mm level. The application fields of pulsed laser ranging are also becoming more and more extensive, such as topographical measurement, tactical frontier ranging, missile orbit tracking, artificial satellites, distance measurement from the earth to the moon, etc. The pulsed laser ranging method is characterized by short laser pulse duration, relatively concentrated energy, and high instantaneous power. In the case of a cooperative policy, pulsed laser ranging can achieve a very long ranging range; it is assumed that only the tiny reflection signal obtained by diffuse reflection of the pulsed laser using the measured policy can be used for ranging. Therefore, the pulsed laser ranging method is widely used.
Now briefly talk about the working principle of the pulse laser rangefinder: the laser emitted by the rangefinder is received by the rangefinder after being reflected by the measured object. The range finder records the reciprocating time of the laser, half of the product of the speed of light and the reciprocating time is the distance between the range finder and the measured object.
The measurement accuracy of the pulse laser rangefinder is poor, and the general accuracy can only reach m level. Therefore, in some cases with high precision requirements, the project may need a phase laser rangefinder. However, due to the extensive measurement planning, the measurement error of one or two meters is now very high.
