RMS-Laser FAQs

Here are some of the Frequently Asked Questions about the RMS-Laser system:

 

RMS-Laser in general

What does RMS-Laser stand for?
Which are the main differences between GPS and laser technologies?
Which are the main advantages of a RMS-Laser system?
May we use RMS-Laser system for real time monitoring?

Applications

What can we measure with a RMS-Laser system?
Which is the minimum and maximum distance that can be measured by a RMS-Laser system?
Which is the minimum displacement that can be measured by a RMS-Laser system?
Which kind of training is necessary to correctly use RMS-Laser system?

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RMS-Laser in general

What does RMS-Laser stand for?
RMS means "Remote Monitoring System" developed by GEODEV
Laser stand for
a laser distance meter

Which are the main differences between GPS and laser technologies?
The GPS technology allows 3D displacements measurement with a sub-centimeter accuracy close to a real time monitoring (2-4 measurement/hour).
With a distance laser sensor is possible to realize millimenter scale precise measurements with a high measurement frequency (2-5 sec/measurement).
In the field of structural end environmental monitorng, the two technologies are complementary and permit to obtain measurements in any kind of situation with the integration of the two sensors in the same network.
Another difference between the two technologies is that, if with GPS the distance between the measured points as well as the environmental conditions (day/night, temperature, pressure, etc..)  is not so relevant, these aspects become significant using traditional instruments such as a laser monitoring system.


The table here below resumes the main features and differences between the two technologies

  Carrier Phase GPS with postprocessamento laser distance meter
Max. measurable length  10-15 Km 500 m (with reflector)
Visibility and weather conditions dependence  (day/night, rain, fog) low  high
Environmental conditions dependence (temperature, pressure) low high
Max. measurement frequency  some minutes  seconds
Visibility between monitored points  not requested  requested 
Single measurement accuracy  < 10 mm < 4 mm


Which are the main advantages of a RMS-Laser system?
RMS-Laser system presents all advantages of a laser distance meter instrument (accuracy and high frequency of data acquisition). In addition we can take into consideration some other advantages been due to the outdoor operability of the instrument, the remote management of the system (automatic data download by radio modem/GSM) and to its autonomy (power supply by solar panel).

May we use RMS-Laser system for real time monitoring?
Of course. The distance laser system allows to perform measurements with an acquisition rate of 0.5.. 4 seconds.

 

Applications

What can we measure with a RMS-Laser system?
The RMS-Laser system permits to measure distances until 500-600 m with a millimeter accuracy and a high acquisition rate. The application domains of the RMS-Laser system include the structural monitoring and geo-dymanics real time surveying.

Measuring principle:

 

Which is the minimum and maximum distance that can be measured by a RMS-Laser system?
The system permits to measure distances ina rand from 0.30 m to 100 m without reflector and from 100 m to 500 m with reflector.

 

Which is the minimum displacement that can be measured by a RMS-Laser system?
The sensor’s accuracy is of ±1.5mm + 1 ppm for each single measurement. The acquisition data timing varies from 0.5 to 4 sec., depending on environmental and brightness conditions. The minimum displacement that can be measured depends therefore on these two parameters. 

 

Which kind of training is necessary to correctly use RMS-Laser system?
The use of RMS-Laser system does not require any particular knowledge of geodetic or monitoring techniques.

 

 

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