Understanding Distance Measurement Technologies
Laser, infrared and ultrasonic are three types of distance meters, but currently we call laser distance meters, laser distance meters, infrared distance meters and ultrasonic distance meters because of the limited measuring distance, the measurement accuracy is very low. There are many applications that are not demanding. A laser distance meter is an instrument that uses lasers to accurately measure the distance to a target. The laser distance meter emits very thin laser light when it is working, and the target is reflected by the photoelectric element. For the laser beam, the timer measures the time from emission to reception of the laser beam, and calculates the distance from the observer to the target.
The laser ranging technology has been developed for many years. The earliest appearance is the contact measurement method. Due to the narrow application range, its development is limited. During the Second World War, the demand for the measurement and positioning of aerial targets promoted the rapid development of electromagnetic wave non-contact measurement technology represented by radar. The precise time measurement technology in the time-of-flight ranging method and many transient process research is one of the most core technologies. In view of the importance of this technology, many domestic and foreign companies, research institutions and universities have conducted research in this area. At present, some precision time measuring devices with different accuracy, different volumetric mass and different cost have been formed.
A typical laser ranging system should have the following four modules: laser emitting module; laser receiving module; distance calculation and display module; laser alignment and focusing module. When the system is working, the transmitter unit emits a laser beam, and after reaching the object to be measured, it is diffusely reflected back. After receiving, enlarging and shaping by the receiving unit, the display unit displays the target object distance after the calculation of the distance calculation unit.
Laser Distance Meter in industrial development
With the continuous development of industrialization, the application range of advanced equipment has become wider and wider, gradually replacing manual labor, which has played a positive role in improving social production efficiency. New technologies and new equipment have been continuously applied in practice, creating tremendous value. In the past, the application of laser distance meters was restricted due to factors such as technological level and price, but the current situation is very different. Many industries have put forward new requirements for the comprehensive performance of this instrument, and its application range has been significantly expanded.
The measurement range of the laser distance meter is several meters to several kilometers, and the user should choose flexibly according to the specific situation. For example, in general indoor measurement work, the distance requirements are not high, but the accuracy requirements are very strict. At this time, a 635-nanometer laser handheld laser distance meter is generally used. If the measured distance is long, the 905-nanometer telescope-type laser distance meter is generally used, and the measurement range is generally between 5 and 3000 meters, which is mainly used in outdoor surveying and mapping, power communications, ports, golf, hunting and other fields. If you want to measure a farther target, such as a target of 3-20 kilometers, you need another band laser distance meter, such as a 1064nm/1535nm/1550nm long-distance distance meter, which requires manufacturing various The parts have extremely high precision, so the unit price is relatively expensive.
At the same time, laser distance meters have been widely used in building surveying and automation fields that require strong light. If there is light pollution in the measurement environment, it will affect the measurement accuracy.
With the rapid development of electronic technology, laser technology, optical technology and other high-tech technologies, it has provided an important foundation for the improvement of remote distance meters. In particular, emerging disciplines represented by laser applications are emerging. The innovation of related concepts and rich practical experience provide an effective reference for the research work of remote laser ranging technology.