Now using a laser rangefinder could easily measure distance, don't need you to take circle feet to calculate, we measured the distance is a good helper, henan zhengzhou manufacturer of laser rangefinder remind laser rangefinder various brand can according to your budget and actual use, to determine the laser range finder, domestic price cheap, but the performance stability is poorer than a imports, imports of laser range finder are relatively mature, but the price is much higher than domestic, and after a domestic is complicated. So what problems do we encounter in using laser rangefinder? Zhengzhou Defy laser rangefinder manufacturer listed several common problems.
What is the principle of using infrared ranging or laser ranging?
The ranging principle can be basically reduced to measuring the time required for light to travel to and from the target, and then calculate the distance D through the light speed c =299792458m/s and atmospheric refraction coefficient n.Because it is difficult to measure time directly, the phase of continuous wave is usually measured.Of course, there are impulse rangefinders, typically the WILD di-3000.It should be noted that phase measurement is not to measure the infrared or laser phase, but measure the modulation of the signal phase above the infrared or laser.The construction industry has a hand-held laser rangefinder for measuring houses that works in the same way.
Must the plane of the object be perpendicular to the light ray?
Usually precise ranging needs total reflection prism, and the house measurement of the rangefinder, the direct reflection of the wall to measure, mainly because the distance is relatively close, light reflected back the signal strength is large enough.With this you can know, must be vertical, otherwise the return signal is too weak to get the exact distance.
Is it ok if the measured object plane is diffuse reflection?
It is usually possible to use thin plastic sheets as reflective surfaces in practical projects to solve the serious problem of diffuse reflection.
Ultrasonic ranging and laser ranging differences?
Ultrasonic ranging accuracy is relatively low, now rarely used.The accuracy of laser rangefinder can reach 1 mm, suitable for all kinds of high precision measurement purposes.