Roughometer III

www.arrb.com.au

collect accurate roughness data

with integrated GPS

Roughometer III

The Roughometer III is a cost-effective, easy to install, portable device which provides objective and repeatable roughness results. The Roughometer III is a WorldBank Class 3 roughness measurement device, which actually exceeds the limitations of the category.

Whilst the Roughometer is a response-type roughness device, it eliminates the uncertainties associated with the vehicle, such as the suspension or passanger weight, by directly measuring the axle movement with a precision accelerometer. This means that compared with other Class III roughness devices, such as a bump integrator, the Roughometer III does not need to be calibrated experimentally to produce a true IRI.

The system is suitable for use on both sealed and unsealed roads and is capable of collecting up to 13,000km of data.

Practical and easy to use, the Roughometer III provides a simple technique for road quality assessment and now has the advantage of an integrated GPS unit.

Once a survey has been undertaken, the Roughometer III processing software enables the data to be formatted into custom graphs, tables and maps.

Applications

Provide objective data for true evaluation of the Ìroughness level of the road

Objectively compare and analyse which roads are in need Ìof repair

Monitoring roughness deterioration trends, reviewing Ìsuccessive survey results spaced over several months

New FeaturesFully integrated and time stamped GPS Ì

USB connection for fast download of data Ì

Up to 13,000 kms of survey data storage Ì

Improved software with automatic download Ì

of data, faster processing and customisable maps

www.arrb.com.au

Features and BenefitsAccurate and repeatable outputs regardless of vehicle Ìtype, suspension and passenger loads

Distance measurement from a high accuracy, wheel Ìmounted Distance Measurement Instrument (DMI)

Integrated GPS for location data with on screen display of Ìsatellite tracking status

Axle-mounted inertial sensor (non contact) used to Ìdetermine road profile and roughness

No in-vehicle computer required Ì

Can be installed into most vehicles Ì

Fast and simple download of data, to laptop or Ìcomputer, using the USB connection

Outputs in International Roughness Index (IRI) or ÌNAASRA counts

Multi-format reports available as detailed tables, graphs, ÌGPS maps and CSV files, suitable for use in a spreadsheet

No periodic calibration required Ì

Vista Business compatible Ì

ComponentsRoughometer hand held Ìcontroller

Interface module Ì

Inertial Module and Ìmounting brackets

Vehicle power cables & ÌUSB communications cable

Distance Measuring ÌInstrument (DMI)

GPS antenna Ì

GPS magnetic roof Ìmount

Roughometer users Ìmanual

Roughometer Ìprocessing software

GPS receiver

Hand-held controller Interface module

Inertial sensor on axle Power supply

DMI

GPS receiver

Hand-held controller Interface module

Inertial sensor on axle Power supply

DMI

June 2009

Note: ARRB Group Ltd reserves the right to change these specifications without notice. Whilst every care is taken in preparing these specifications, ARRB recognises that there may be classes of surface and applications for which the device has not been tested, and for which the device may not meet the stated specifications.

Specifications

Data storage capacity 13,000 kms (2GB memory)

Communication USB cable adaptor

Power source 12 V DC, with cables supplied for cigarette lighter connection or direct battery connection

Data sampling interval 50 mm (2 inches)

Inertial sensor Single sensor mounted on inside of driver’s side rear wheel Mounting brackets (live axle and IRS) and a selection of clamps supplied with kit

Roughness units International Roughness Index (IRI) Australian bump integrator units (NAASRA counts)

Accuracy (roughness) IRI: Correlates to better than ± 0.5 IRI of true IRI (when operated within design parameters) NAASRA: ± 12 NAASRA counts

Resolution IRI: 0.1 IRI. NAASRA: 5 NAASRA counts

Survey speed Optimal speed 40 to 60 km/h (25 to 40 mph) Dependent on road condition

Software / office computer Roughometer Processing software (supplied) for IBM Compatible Pentium II or Windows XP / Vista (PC not supplied)

Distance measurement Wheel-mounted Distance Measuring Instrument (DMI)

Distance units User selectable. Metric (kilometers) or Imperial (mile)

Distance Accuracy Better than 0.1%

GPS Position Accuracy +/- 3 to 15 metres (subject to availability of WAAS)

GPS Update rate 1 second

GPS Antenna Mounting Magnetic roof mount (supplied)

Roughometer III

ARRB Group Ltd. 500 Burwood Highway Vermont South VIC 3133 Australia

P: +61 3 9881 1555 F: +61 3 9887 8104 productinfo@arrb.com.au www.arrb.com.au

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