PROFILING DEVICES
Geosolve offers a variety of profiling devices.
The RSPIV (Road Surface Profilometer Mk IV, mark4) measures the IRI and NAASRA, it is extremely versatile and can be quickly attached to any vehicle.
The profiler can be used to measure roughness at project level or network level investigations. The RSPIV uses a laser and accelerometer to measure the International Roughness Index (IRI) and NAASRA. Unlike the roughometer and BI Meter, the device is vehicle independent, not being affected by the vehicle type, suspension, tyre pressure/temperature which will change result from the roughometer and BI Meter throughout the day.
The HSD and RSP4 both have Stop & Go functionality: For the equipment to operate in an efficient manner in urban areas, where traffic lights, stop signs, junctions and roundabouts are prevalent, the profiler can continue to collect NAASRA, IRI and RN data at speeds down to zero. For a few meters before and after a stop the readings may be affected, but no "run-in" pre-section is needed after the stop.
Results showing IRI and NAASRA and survey result can be handed to the site engineer at the end of run, so rapid decisions can be made whether additional work is required or the chip seal can be applied. Once the chip seal or asphalt applied the finished pavement a final survey can be conducted at normal traffic speeds, providing the site engineer with a report showing whether the roughness compliance criteria has been met.
The RSPIV is ideal for QA and conformity checking for roughness on newly sealed pavements.
The RSPIV meets the requirement of the TNZ TM 7003v1, AGAM-S001-16 Specification for Pavement Roughness Measurement with an Inertial Profilometer.
The Dynatest RSP offers high speed surveys at all traffic speed, simultaneously measure the roughness, rutting, macrotexture and right of way imaging. Pavement visual distress can be undertaken at speeds up to 100kph at day or night with the addition of the Laser Crack Measurement System (LCMS).
The profiler unique in it’s ability to collect data from 0-100kph, this slow speed functionality allows the RSP to collect data also at slower speeds, 0 -20kph. On a typical urban/rural network, data collection speeds will drop below 20kph around 30-40% of the survey time; on approach to junction, roundabouts, slip-offs etc. The RSP Stop and Go functionality removes the need for the operator to subjectively assess the roughness by looking at the pavement. Trend analysis of network data is very important to predict future conditions, the RSP can collect this data objectively and the annual validation and weekly calibration procedure the equipment goes through ensure accurate and repeatable data can be collected for the whole network, year on year.
The equipment is calibrated and validated annually ensuring the quality of data meets the NZTA and Auckland stringent specifications
The RSP complies with the following Austroads standards:
• AUSTROADS TEST METHOD AG:AM/T001 - PAVEMENT ROUGHNESS MEASUREMENT WITH AN INERTIAL LASER PROFILOMETER
• AUSTROADS TEST METHOD AG:AM/T013 - PAVEMENT SURFACE TEXTURE MEASUREMENT WITH A LASER PROFILOMETER
• AUSTROADS TEST METHOD AG:AM/T009 - PAVEMENT RUTTING MEASUREMENT WITH A LASER PROFILOMETER