Classification of electromagnetic wave rangefinders
1. According to the principle of distance measurement, it can be divided into pulse method rangefinder and phase method rangefinder. The former is a pulse generator that emits light pulses, and the distance is calculated by using the number of pulses that travel back and forth on the measuring line, such as laser lunar instruments, laser artificial satellite rangefinders, etc. The latter is achieved by emitting continuous sine modulated waves from a rangefinder, measuring the phase shift generated by the modulation wave propagating back and forth on the measuring line to determine the distance, such as laser rangefinders, infrared rangefinders, etc. The instrument using phase method for distance measurement has a short measurement range and high accuracy, and is commonly used in geodesy.
2. Divided by carrier wave, electromagnetic waves in the micro band or optical waves as carriers are respectively called microwave rangefinders or photoelectric rangefinders. Photoelectric rangefinders using laser or infrared light as carriers are called laser rangefinders or infrared rangefinders, respectively. The infrared rangefinder is developed using fluorescence from gallium arsenide light-emitting diodes as the carrier source, and the intensity of the emitted infrared can vary with the intensity of the injected electrical signal. Therefore, it has a dual function of both a carrier source and a modulator. Gallium arsenide light-emitting diodes are widely used due to their small size, high brightness, low power consumption, long lifespan, and continuous emission. Electromagnetic wave rangefinder has the advantages of high accuracy, fast operation, and minimal influence from climate and terrain.
How to adjust the unit of the rangefinder to m
Press and hold the key below the addition and subtraction symbol, which is the key on the left side of the bottom line, and continue for a few seconds. Change the unit once, and press the Prytest X2 every time.
A rangefinder is an instrument designed based on the principles of optics, acoustics, and electromagnetic waves for distance measurement. A rangefinder is a type of trajectory estimation instrument used to measure the distance of a target and perform trajectory estimation. There are many forms of rangefinders, usually a long cylindrical device consisting of an objective lens, an eyepiece, and a ranging knob, used to measure the distance of a target. Laser rangefinder is an instrument that uses laser to accurately measure the distance of a target. The laser rangefinder emits a very fine laser beam towards the target during operation, and the photoelectric element receives the reflected laser beam from the target. The timer measures the time from the laser beam to the receiving point and calculates the distance from the observer to the target. Laser rangefinders are currently the most widely used rangefinders, which can be classified into handheld laser rangefinders (measuring distances of 0-300 meters) and telescope laser rangefinders (measuring distances of 500-3000 meters).
