VIEWORKS
Fueling the need for SPEED
American highway officials are using a rig comprised of five LMI Gocator 2375 sensors mounted on a vehicle to measure the condition of pavements
edge processor to take video from the in- built 1080p board-level camera, and runs machine learning algorithms to extract the location and classification of each road user. With each frame of video under normal operation deleted immediately after processing, only anonymous data is extracted, stored and transmitted. Te sensors have mobile connectivity, so the data can be sent to the cloud, enabling remote access at any time to view operation status, enable remote debugging and maintenance, and action remote updates as functionality is improved. Nicholson said: ‘Data insights provide
the ability both to analyse where to implement changes and evaluate the effectiveness of these schemes. Te next stages of regeneration are crucial, and we’re delighted to be working with Sutton and Kingston Councils to help improve their active travel insight, and assess and improve the safety of high footfall areas.’ If the pilot is successful, the scheme could
be expanded across the boroughs and into the adjacent boroughs of Merton, Croydon and Richmond.
Pavement management Vision is also being used in the US to help keep pedestrians safe in a pavement management exercise that has been implemented by the American Association of State Highway and Transportation Officials (Aashto). Te association introduced some provisional new specifications for measuring the condition of pavements, detecting whether and to what extent they are damaged.
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Te association’s new specifications define measurement of ruts, cross slopes, deformations and lane-edge drop-off. However, it struggled to find a complete profiling system that complied with these specifications. Surface Systems and Instruments (SSI), together with LMI Technologies, built a 3D-profiling system able to meet these needs. Te 3D sensor had to provide high-speed data acquisition with a large coverage area, large clearance distance, high measurement accuracy in an outdoor environment, and a robust industrial package with a small footprint. SSI had previously partnered with
C M Y CM MY CY CMY K
High Speed & High Resolution CMOS Cameras with CXP-12 Interface
LMI Technologies, using sensors from its Gocator range. It selected the Gocator 2375 sensors for the solution, which generates 3D data using laser line profiling. Several profiling systems have been
mounted on pick-up trucks and are currently in use with Aashto. To cover the specified transverse profile width of 4 or 4.25m, five Gocator 2375 sensors were mounted on each vehicle, three pointing straight down, and the outer two angled outward to minimise vehicle width, while maintaining a large scan width. SSI also equipped the vehicles with GPS,
an inertial measuring unit for vehicle pitch and roll compensation, a camera for area imaging, two Gocator 2342 3D sensors in the vehicle frame for ride and roughness measurement, and a high-end, ruggedised notebook computer. SSI integrated all sensors with data synchronisation, and developed a software package for analysis, display and reporting in compliance with the Aashto specifications. O
330 fps Speed
at 12 MP Resolution VC-12MX2
71 fps at 65 MP VC-65MX2
150 fps at 25 MP VC-25MX2
LMI Technologies
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