Laser rangefinder is an instrument that uses a certain parameter of modulated laser to measure the distance of the target. It is generally used in topographic measurement, industrial measurement, mining, ports, military industry and aviation.
Principle of laser rangefinder
In simple terms, it can be attributed to measuring the time required for light to travel back and forth to the target, and calculating the distance through the speed of light and the atmospheric refraction coefficient. Since it is somewhat difficult to measure time directly, usually the phase of the continuous wave is measured, which can be called a phase-measuring rangefinder. Direction finding does not measure the phase of infrared or laser, but measures the phase of the signal modulated on infrared or laser. The handheld laser rangefinder commonly used in the construction industry has the same working principle.
Classification of laser rangefinders
1. Handheld: The measurement distance is short, generally within 200 meters, and the accuracy is about 2mm.
2. Cloud type: The measurement data of the laser rangefinder is transmitted to the terminal in real time through Bluetooth, such as mobile phones, computers, etc. After connecting to the Internet, the data can be transmitted to the cloud, which can realize real-time data sharing.
3. Telescope type: The measuring distance is far, generally between 3.5 meters and 2000 meters. Some telescopes can measure up to 10 kilometers. Because the measuring distance is far, its power is also large. It is recommended to protect the laser when using it.
Tips for purchasing laser rangefinders
1. Measuring range: Choose according to the actual measuring distance. If the distance is short, you can choose the handheld type, and if the distance is long, you can choose the telescope type.
2. Use environment: If you measure the indoor environment, you can choose the handheld type, which has good measuring accuracy and effect. When measuring the outdoor environment, due to the influence of outdoor light pollution, the handheld measurement accuracy will be significantly reduced. At this time, you can choose the telescope type.
