The accuracy of pulse method measuring distance is generally about +/- 1 meter. Half of the product of the speed of light and the round-trip time is the distance between the rangefinder and the measured object. The process of pulse distance measurement is as follows: the laser light emitted by the range finder is reflected by the object to be measured and then received by the range finder, and the range finder also records the round-trip time of the laser. Two methods are generally used to measure distance: pulse method and phase method. Rangefinder is also called distance meter, which is an instrument used for distance measurement based on the principles of electromagnetic wave, optics, acoustics and has a compact body.
Therefore, this classification method is only suitable for measurement tools with a single working principle.Ī measuring tool that can measure the length or angle of various types of work-pieces, This type of measuring tool has the most varieties and specifications, and is also the most widely used, including gauge blocks, angle gauge blocks, polyhedral prisms, sine gauges, calipers, micrometers, dial indicators, multi-tooth indexing tables, comparators, and laser length measuring instruments, tool microscope, coordinate measuring machine, etc. However, some modern measurement tools have developed into measurement tools that use the principles of precision mechanics, light, and electricity at the same time and combined with electronic computer technology. Measuring tools can also be divided into mechanical, optical, pneumatic, electric and photoelectric types according to their working principles. According to its usage, it usually can be divided into two types: General measuring tools and special measuring tools. Including length, temperature, time, mass, force, current, voltage, resistance, sound, radio, refractive index and average dispersion. A measuring tool is a tool for measuring a certain property.