Often have friends will ask, how to use the old A laser range finder, there is no way, we have to do a simple laser range finder
The application of laser in the field of detection is very wide, the technical content is very rich, the impact on social production and life is also very obvious. Laser ranging is one of the earliest applications of laser. This is because the laser has a strong directional, high brightness, good color, and many other advantages. The basic principle of measuring distance by using the laser transmission time is to determine the distance of the target by measuring the time required for the laser to and from the target.
Now, the method of automatic detection and control, in addition to ordinary ultrasonic sensors and photoelectric sensors, has added a new method to solve the long distance measuring and testing the transmission time of laser distance sensor. It provides flexibility in the application for a variety of occasions, these occasions can be included as follows:
Equipment positioning.
Measuring the material level of the material package.
Measuring the distance and the height of the object on the conveyor belt.
The log diameter measurement.
The protection of overhead crane from collision.
The non error check situation.
Two methods are generally adopted to measure the distance between laser range finder: pulse method and phase method. The process of the pulse method is such that the laser is emitted by the laser range finder, which is absorbed by the reflection of the object and is absorbed by the laser range finder. The half of the product of the speed of light and the back and forth, is the distance between the laser range finder and the object being measured. Pulse method of measuring the accuracy of interval is in general is + / - 1 meters. In addition, the measurement blind area of this kind of distance measuring instrument is usually about 15 meters.
Four points of application method of laser range finder
(1) first settled settled instrument theodolite in the station, to the leveling after the laser rangefinder mounted in the theodolite bracket, with screw locking connector, insert the battery at the bottom of the host machine, fastening. The company to remind the purpose point to settle reflection prism to the leveling, and the mirror toward the host.
(2) vertical angle, temperature pressure Shun good theodolite cross sighting target horizontal center, measuring vertical angle. At the same time, observing and recording the temperature and good pressure meter reading. Observation of vertical angle, temperature along the good pressure, the goal is to measure the distance from the tilt of the tilt correction, temperature correction and good pressure to get the accurate degree of interval.
(3) ranging from the power to prepare the key "PWR" boot, the host self-test and display the original set of temperature, pressure and prism constant value, after the self inspection will show "good". If you modify the original set value, press the "TPC" key after the input temperature, pressure or prism constant (generally through the "ENT" key and digital key input). In general, only the use of the same kind of mirror, prism constant, and the temperature and pressure of each observation may be different, it is necessary to set.
(4) interval measurement to adjust host axis adjusting hand wheel (or degree of collimation Theodolite Level micro spiral) and micro host pitch spiral, the rangefinder telescope accurately aimed at the center of the prism. In the "good" state, can also be based on accurate aiming to determine the buzzer sound, the stronger the signal noise is big, up and down around the micro range finder, the maximum buzzer sound, will complete the accurate targeting, the emergence of "*". Application of laser rangefinder, laser range finder has been widely used in the following areas: electricity, water, communication, environment, construction, geological, police, fire, explosion, navigation, railways, anti-terrorism / military, agriculture, forestry, real estate, leisure / outdoor sports etc..
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