Acuity Products Limited
Optic Technium,
Ffordd William Morgan,
St Asaph Business Park,
St Asaph, North Wales,
LL17 0JD
T: 01745 535 237

also at:
Unit 3,
Baxall Business Centre,
Adswood Road,
Stockport, SK3 8LF
T: 0161 480 2333

UltraScreen™ system functionality

1 Detect & track the 4 primary interfaces: Outer Diameter, Outer Screen, Inner Screen and Core

2 Detect significant deviations in the geometry of these interfaces

3 Detect statistically significant stand alone features at the interfaces and in the bulk insulation with a high degree of False Alarm Rejection Rate (FAR) detection
4 Integrate feature detection with nearest neighbours from adjacent scans to further improve false data rejection

5 Process Operator displays for easily understanding of both short term and long term trends in relative concentricity (layer thickness), and eccentricity (layer ovality)

UltraScreen™ has been designed and built to provide a completely automatic system for the online detection and reporting of XLPE High Voltage cable geometries, highlighting previously unseen features at semiconductor and insulation boundaries during the manufacturing process. By ultrasonically scanning at 16 positions around the cable, UltraScreen™ is able to identify features at the outer and inner screen interfaces, as well as within the insulation layer. Eccentricity and Concentricity factors can be determined at any time during the manufacturing run, as well as both short and long term variations in the thickness of each layer. Built on earlier research work carried out in the UK by a number of industrial and academic partners, UltraScreen™ is benefitting from recent advances in processing and electronic hardware, software and data storage capacities. The powerful new processing system developed by Acuity incorporates modern front end electronics & operating system software to finally realise the many benefits of the ultrasonic scanning of cables envisaged by the original collaborators. Combining many years of senior level consultancy work in the development of highly sophisticated data processing algorithms for the military sonar market, the development engineers at Acuity have achieved a remarkable success – to capture and differentiate highly attenuated signal returns from extremely small changes in the speed of sound caused by change of materials at the interfaces and from foreign objects and voids within the bulk insulation material.

Using their vast experience in False Alarm Rejection (FAR) techniques, Acuity are able to provide consistently accurate assessments of cable quality.