What are the application methods of handheld laser rangefinders in underground mines?
Handheld laser rangefinder, as a type of rangefinder, has unique functions and characteristics compared to ordinary rangefinders.
The application of DISTO in mines mainly utilizes a combination of DISTO and domestic theodolites to form a prism free half station instrument, which is used for measuring points, section height, and mining volume in underground mining areas.
What was the original underground measurement method before purchasing the DISTO handheld rangefinder in a certain unit? The person in charge of the measuring unit stated that they used a theodolite, a tape measure, a fishing rod, and a domestically produced pulse rangefinder to measure the underground mining area. The main drawbacks of this method are:
1. Low measurement accuracy. There is a set of data that can prove it; At the end of 1998, two geological survey groups jointly measured the volume of a mining site, and the results showed that one group was 55000 cubic meters and the other group was 68000 cubic meters. Measure one measurement at a time, and the difference between several measurements is significant, so I dare not continue with the measurement.
2. Slow speed and low efficiency. The working environment underground cannot be compared to the surface environment. Due to poor underground conditions, low lighting, and low coefficients, the measurement speed is slow and the efficiency is low. Often, one measurement point takes several times more than the usual measurement time.
Although domestic pulse handheld rangefinders can also measure distance, due to their ultrasonic ranging, people cannot see the position of the target point. In addition, the measurement range is too short and the accuracy is low, greatly limiting their range of use.
Changes after using DISTO:
In underground measurement, only one theodolite and one rangefinder need to be set up by the surveyor, and there is no need to stand at the target point. The measurement task can be smoothly and accurately completed in a short time, overcoming the disadvantages of slow speed, low efficiency, and poor accuracy in the past. Especially in underground measurement, the advantage of handheld laser rangefinder that can see red laser points is particularly praised by the surveyor. Handheld laser rangefinders can also be used separately in underground measurements, which is quite convenient and can store a large amount of measurement data without the need for underground measurement records. Handheld laser rangefinder can not only be conveniently used underground, but also for outdoor slope measurement and layout.
