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The following describes the principle and usage of the laser range finder, which allows workers to work and learn with high efficiency and high precision.
A laser range finder is an instrument that uses a laser to accurately measure the distance of a target. The laser range finder emits a very thin laser beam to the target during operation. The photoelectric component receives the laser beam reflected by the target, and the timer measures the time from the transmission to the reception of the laser beam to calculate the distance from the observer to the target. If the laser is continuously launched, the measuring range can be up to 40 kilometers, and the fluorine butterfly valve can be used to work day and night.
If the laser is pulsed, the absolute accuracy is generally low, but for long distances, good relative accuracy can be achieved. The world's first laser was first developed by the American Hughes Aircraft Company's scientist, Mehman, in 1960. The US military quickly conducted research on military laser devices on this basis. In 1961, the first military laser range finder passed the US military demonstration test, and the laser range finder quickly entered the practical complex.
The laser range finder is light in weight, small in size, simple in operation, fast and accurate, and its error is only one-fifth to one-hundredth of the other optical range finder. It is widely used in topographic survey, battlefield measurement, and tank. , aircraft, ships and artillery to the target, measuring the height of clouds, aircraft, missiles and satellites. It is an important technical equipment to improve the accuracy of high tanks, aircraft, ships and artillery.
As the price of laser range finder has been continuously lowered, the industry has gradually begun to use laser range finder. A number of new miniature range finder with fast measuring range, small size and reliable performance have appeared at home and abroad, which can be widely used in industrial measurement and control, mining, port and other fields.
The main classification 1D laser range finder is used for distance measurement and positioning; the 2D laser range finder (Scanning Laser Rangefinder) is used for contour measurement, positioning, area monitoring, etc.; 3D Laser Rangefinder is used for 3D Laser Rangefinder 3D contour measurement, 3D spatial positioning and other fields.
The principle and method of measuring the distance of the moon to the earth using laser to measure the distance of the laser range finder
1. What is the principle of using infrared ranging or laser ranging?
The principle of ranging can basically be attributed to measuring the time required for the light to travel to and from the target, and then calculating the distance D by the speed of light c=299792458m/s and the atmospheric refractive index n. Since the direct measurement time is difficult, it is usually measured the phase of the continuous wave, which is called a phase measuring range finder. Of course, there are also pulsed range finder, typically DI-3000 of WILD. Note that the phase is not measuring the phase of the infrared or laser, but measuring the phase of the signal modulated on the infrared or laser. The construction industry has a hand-held laser range finder for house measurements that works in the same way.
2. Is the plane of the object to be measured perpendicular to the light?
Usually, precision ranging requires a full-reflection prism, and the range finder for house measurement is measured directly by smooth wall reflection, mainly because the distance is relatively close, and the signal intensity reflected back by the light is large enough. It can be known that it must be vertical, otherwise the return signal will be too weak to get the exact distance.
3. Is it possible if the plane of the object being measured is diffuse? It is usually also possible. In actual engineering, a thin plastic plate is used as a reflecting surface to solve the problem of serious diffuse reflection.
4. Ultrasonic ranging accuracy is relatively low and is rarely used now.
Measurement principle and function method of laser range finder With the development of science and technology, it seems that most people do not know about laser range finder and do not understand laser range finder. Even some workers are still using the tape measure to measure the area' volume and so on.