What are the methods of measuring distance and speed

Short distance accurate distance measurement can be measured with a ruler, if there is no ruler, you can use the human body structure of the way for estimation, for example, my middle finger and forefinger of the maximum spacing is 20 centimeters, the arm span is 164 centimeters. Longer distances can be measured using a car as a tool, which has a distance meter.

Lasers can be used for speed measurement.

Laser speed measurement (measurement of velocity by laser) is the measurement of moving objects reflected back to the frequency of light due to the Doppler (Doppler) effect occurs in the Doppler effect of deviation, in the object to be measured is hot or fragile can not be used to contact the method, this method is very useful, has been used to measure the speed of the hot billet in the rolling mill.

Laser speed is able to run through the laser speed measurement of the object, it is the object to be measured twice with a specific time interval of laser ranging, to obtain in the period of time the object to be measured by the movement of the distance, so as to get the object to be measured by the movement of the speed. At the same time it is also a new type of speed measurement technology. With the development of science and technology, the traditional measuring equipment has been unable to meet the needs of the status quo, has gradually been eliminated, and the laser speed sensor has been widely used, which has an important significance in many areas of measurement.ZLS-C50 laser speed sensor and ZLS-Px laser speed sensor is specially customized high-precision laser speed sensor, and is also the two commonly used in the domestic high-precision laser speed sensor. speed sensors are also the two high-precision laser speed sensors commonly used in China. And they can be connected to the computer, the measured object can be automated, intelligent measurement and control, which is now the product of the combination of measurement technology and computer technology.