|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
 |
|
 |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Unparalleled Technology
|
|
|
|
|
|
The core of PSI’s innovative sensor technology is phase-measurement Lasar Radar (Ladar) developed with an unprecedented combination of precision, range, and sample rate to meet the demanding requirements of pavement testing from a test vehicle traveling at highway speeds. The static ranging precision is 20 microns (<0.001 inches) rms at a range of 2.1 meters (7 feet) and a sample rate of 1.25 MSPS. |
|
|
|
|
|
|
 |
|
|
|
|
|
|
A polygon scanner with 6 sides is used to point the Ladar measurement system at points along a straight line on the pavement, thereby scanning a line and generating the profile along the line 6 times per revolution of the polygon. At 10,000 RPM the system can generate up to 1,000 scans per second. With the scanner mounted 7 feet above the pavement, the ±45° field of view produces a profile 14 feet long. |
|
|
|
|
|
The orientation of the polygon’s rotational axis determines how the scan lines are positioned on the pavement. The two standard installations are where the rotational axis is orthogonal to the direction of travel. This produces tranverse and longitudinal scans as the pavement testing vehicle is driven along in-service roads. Full lane and shoulder coverage is accomplished with no hardware extending beyond the vehicle. |
|
|
|
|
|
A range of applications of the pavement profile scanner, from RollingWheel Deflection to Rutting, are illustrated on the inside pages of this brochure. Applications scanning longitudinally are shown on the left page and applications scanning transversely are shown on the right page. More than one scanner can be operated from a vehicle at one time to perform integrated functions by scanning transversely and longitudinally at the same time. Oblique scanning presents interesting possibilities as well. Also, one scanner can serve many different requirements since it can easily be reconfigured for different purposes. |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
HOME |
|
|
|
|
|