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The Laser Profile Measuring System LPM-321 integrates a stepper motor driven
pan and tilt mount (1) to rotate the long range distance meter (2).When
scanning, the pan and tilt mount triggers range distance measurements at angular
positions defined by the user selected scan pattern.
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The distance meter is able to provide up to three “target distance”
and “signal intensity” pairs per measurement . These results
are transmitted to the pan and tilt mount, which combines the range and signal
intensity pairs with the angle values of horizontal and vertical axes, thus forming
the total measurement result.
Scan data (consisting of these measurement results) are transmitted to an external
laptop (3) via a LAN TCP/IP interface (4). Images
from the optional camera (5) are provided via an USB interface
(6).
Together with the telescope (7), a joystick (8),
available additional to the positioning handwheels, enables smooth alignment of
the distance meter. Alignment to certain positions can be used to easily specify
the scan area by defining the current alignment position as the upper/lower left/right
corner of the desired scan area.
The RIEGL software package RiProfile (9), running
on the laptop, combines and processes scan data and camera images. It supports sensor
configuration, data acquisition, data visualization, data manipulation, and data
archiving. RiProfile runs on platforms WINDOWS XP and 2000 SP2.
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LPM-321
The Laser Profile Measuring System LPM-321 provides unprecedented flexibility for
long range 3D profiling. Hemispheric scanning, automated or manual operation, reflectorless
ranging up to 6000 meters, high accuracy and a comprehensive 3D data acquisition
software package operable with any standard laptop or PC are included. Without the
use of a retroreflector the LPM-321 calculates the distance to the surface in question,
based on the time-of-flight measurement of a short laser pulse.
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The distance meter comprises state-of-the-art digital signal processing and echo
waveform analysis, enabling precise distance measurements even under bad visibility
conditions. In multi target situations, the distance meter can provide up to 3 target
distances per measurement.
The point of impact of the measuring infrared laser beam can be observed through
a telescope. The pan & tilt mount serves to automatically position the beam
using the integrated stepper motors with an accuracy of 0.009 degrees. Handwheels
for manual operation are provided too.
The optional combination with a calibrated and accurately orientated and mounted
high resolution digital camera results in a hybrid sensor system. This system provides
data which lends itself to automatic or semi-automatic processing of scan and image
data to generate products such as colored pointclouds, textured triangulated surfaces
and high resolution panorama images as a basis for e.g., geotechnical analysis and
mining assessment.
The LPM series provides the user with the sophistication of RIEGL laser measurement
technology combined with a robust and easy to use design.
- Ranges up to 6000 m @ Laser Class 1M
- Echo digitization and online waveform analysis
- Measurement accuracy typ. 25 mm
- Measurement rates up to 1000 points/sec
- Field of view up to 150° x 360°
- Topography & Mining
- Monitoring
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