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Railway tunnel protected by Accur8vision's cutting edge technologies

Railway tunnel protected by Accur8vision's cutting edge technologies
The Březno railway tunnel to receive a top security system; cutting edge technologies to be delivered and installed by ČD - Telematika for AŽD.
The Březno tunnel on the Lužná u Rakovníka – Chomutov line will receive brand new protection for its portals. The second longest Czech railway tunnel will be provided with cutting edge security technologies by ČD - Telematika as a subcontractor of AŽD, who won the contract from Správa železnic (Czech railway administration authority). A key project part consists in delivery and installation of the new Accur8vision security system based on accurate lidar detection.

“Railway infrastructure projects are a traditional field of our skills, and this is where we tangibly reaffirm our ability to deliver and install state-of-the-art technologies,” underlines Tomáš Businský from ČD - Telematika. The contract consists in a comprehensive replacement of the existing protection of Březno tunnel portals approaching the end of its service life, of the ESS (electronic security signalling) system, infragates, step-on rugs, analogue cameras and loudspeakers including UPS backup power sources.

Accur8vision provides detection based on multichannel LiDAR detectors. The LiDAR technology works on a principle similar to radar, while utilizing a light beam emitted by a laser diode instead of radio waves. LiDAR sensors from an American supplier will be used to protect the Březno tunnel, whose technologies are exploited, besides other areas, in autonomous car driving systems. The accuracy of lidar detection is between 2 and 3 cm, and the installed system is unique by its accurate localization of all moving objects within the protected zone and, thanks to its unique technology, it can pilot PTZ cameras directly to the point of alarm origin and follow the intruder.

The system manages, intelligently and fully automatically, the numbers of cameras monitoring various targets, switching highly dynamically between cameras, so that targets are viewed from different angles, everything without any operator’s intervention, fully autonomously. Moreover, the Accur8vision user application is extremely user-friendly, with virtual reality elements offering real-world simulation by means of 3D maps. Drones are used in order to create map materials for the application. A drone executes, fully automatically, its flight mission, taking a large amount of digital photographs, from which a 3D model is automatically generated as a complete 3D map. An anticollision system well known from computer games is also deployed.

External data distribution boards and posts 5 metres high with LiDAR sensors will be installed near tunnel portals for the sake of full spatial detection of protected zones. The posts will be equipped with PTZ cameras intended to follow the object when the protected zone is breached, as well as fixed cameras for continuous monitoring of entries into tunnel portals. The system will also contain a radar as an auxiliary detection tool in adverse weather conditions. The train dispatcher at the Chomutov station and the fire rescue service in Chomutov will be able to use PTZ cameras controlled by the operator independently on the overall system. Also the existing data cabling will be upgraded, with a data technological network enabling a transmission rate of up to 1 Gbit/s. The new electronic security system will also include a source of uninterrupted power supply at 60kVa.

The overall system will be integrated into the DDTS (remote diagnostics of technological systems), with the original security equipment due to be dismantled as soon as the test operation is completed and regular operation approved. ČD - Telematika will also be in charge of test operation of the entire system for the railway administration authority and of legislative activities towards regular operation of the system.
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