When purchasing a laser distance meter, you need to consider a few points:
1. Measurement planning
2. Measurement accuracy
3. Place of application
Basically, it is divided into the following situations:
a) Only need to measure the distance within a few meters or ten meters planning, and the accuracy is not high. It is recommended to use an "ultrasonic distance meter" (now it has been eliminated). Filling--The effect of ultrasonic distance meter measurement is greatly affected by the environment, and its stability and directionality are worse than that of laser distance meters, 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 accuracy requirements.
Suggestion-"Handheld Laser distance meter" can be purchased. Filler-Handheld laser distance meter is suitable for indoor use, and its measurement accuracy and function are very good. (If the user needs to conduct exploration in an outdoor environment, it is recommended to be equipped with a professional laser sight and reflector, combined with the use of talent to achieve the expected range and effect.)
c) The measurement distance is far, and it is mostly used in the field. Suggestion---purchase "telescope type laser distance meter" (ie: laser distance meter telescope)
The status quo and opening trend of handheld laser distance meters
This is an era where technology is rapidly opening up, and people's lives are increasingly dependent on technology. Take the laser distance meter as an example. In the past, people used tape measure, disconnection, measurement, etc. to measure distance, but now it can be finished by pressing a button on this small laser distance meter. And the laser distance meter is more accurate and smaller than those traditional measurement methods. Lightweight and easy to carry.
Because of its wide range of uses, the opening of laser distance meters is unstoppable. Nowadays, there are laser distance meters in the market: pulsed laser distance meters and phase laser distance meters. Although they are all used to measure distances, they have their own interests. The pulsed laser distance meter has poor measurement planning accuracy, while the phase laser distance meter has a small measurement plan but high accuracy can reach the millimeter level. During this period, the application fields of pulsed laser ranging have become wider and wider, such as topographic surveying, tactical frontier ranging, missile operation orbit tracking, and measurement of artificial satellites, the distance from the earth to the moon, etc. The pulsed laser ranging method uses the characteristics of a very short duration of laser pulses, relatively convergent energy, and large instantaneous power. With a cooperative policy, pulsed laser ranging can reach extremely long ranges; assuming that only the measured range is used The tiny reflection signal obtained by the diffuse reflection of the pulsed laser can also be used for distance measurement. Therefore, the pulsed laser ranging method is used more frequently.
Now briefly talk about the operating principle of the pulsed laser distance meter: the laser emitted by the distance meter is reflected by the object to be measured and then received by the distance meter. The distance meter records the reciprocating time of the laser, the product of the speed of light and the reciprocating time. Half of that is the distance between the distance meter and the object to be measured.
The measurement accuracy of the pulsed laser distance meter is poor, and the general accuracy can only reach the level of m, so some occasions with high accuracy requirements may require the use of a phased laser distance meter. However, for long-distance measurement, because of the wide measurement planning, a measurement error of one or two meters is now considered to be very accurate.