Anti-Collision Device (ACD) Network(Raksha Kavach)

A Train Collision Prevention System (TCPS)

BYARUN TB060457CE

Train Collisions - A Challenge Accepted

z August 1999, Head-on Collision at Gaisal 300 deadz December 2000, Sarai Banjara rail disaster -46 deadz January 2003, Ghatnandur train crash -18 deadz June 2004, Karanjadi train crash -20 dead

Based on Radio communication, Microprocessors andGlobal Positioning System (GPS) technology, a Team ofKonkan Railway in 90 days produced a prototype ofAnti-Collision Device (ACD)

WHAT IS AN A C D ?

z The Anti Collision Device (ACD) is a self-acting microprocessor-based data communication device designed and developed by Konkan Railway (KR).

z When installed on locomotives (along with an auto braking unit-ABU), guard vans, stations and level-crossing gates (both manned and unmanned), the network of ACD systems prevents high-speed collisions in mid-sections, station areas and at level-crossing gates, thereby saving the lives of rail passengers and road users.

z The ACD uses both radio frequency and global positioning system (GPS) through satellites, whereby a train is automatically brought to a halt if the track ahead is not clear. The train starts braking three kilometers ahead of a blockade.

Inside the ACD

z The heart of the ACD is an Intel 80386 processor that uses the DM&P M617 Intel chipset. It [ACD] has an integrated digital radio modem and works on the VxWorks

WORKING OF AN ACD

A C D -AN OVERVIEW

Salient Features - What ACD CAN DO

z Detection & Prevention of Head-on, Rear-end and Side Collisions A UNIQUE feature even when a train is not protected by a signal, as in a block section

Detection & generation of Train Parting / Jumbling -Consequently bringing any approaching train on the adjoining line to a dead stop

z Train Approach Warning for road users at Level Crossings both manned and unmanned - In addition, at manned non-interlocked level crossings, reducing the train speed to 30 Kmph in case the gate is detected in open condition through Gate ACD

Salient Features - What ACD CAN DO

z Detection of fouling and prevention of collision due to fouling - Except when a Train on main line overshoots the Fouling Mark

z Station Approach Warning to Drivers - Can result in saving of manpower for deployment of detonators during foggy weather, provided 100% coverage of ACD fitted trains is available on the concerned ACD route

Salient Features - What ACD CAN DO

z Speed limit imposition - Based on preset conditions in Functional Requirements Specification (FRS) of ACD

z Manual SOS functionality available for Drivers, Guards and Station Masters - To bring all trains to a halt within a radial distance of 3 Kms, in emergencies

z Auto Brake Test Generating braking characteristics for a Train without manual feeding of data of coaches / load - A UNIQUE feature as train characteristics are required to be fed manually in all other systems in the world

ACD Network CAN NOT Prevent a Train Collision when

z Other train is a NON ACD Train ACD functions by reacting to another ACD, as such if one of the two trains is a non-ACD train, the protection against collision will be missing

z Adequate braking distance at that speed is not available when a dangerous collision-like situation arises suddenly However, severity of the collision would be reduced as a function of the reaction time

z Train derails and its wagons/coaches dash with another Train, already on adjacent track No reaction time situation

z Failure of brake power of the Locomotive/trainz Rolling backward/forward of a Stabled load

ACD Network (Raksha Kavach) Technology

z A Network of on-board (Locomotive and Guard) and track-side (Station, Level Crossing, Loco shed, Repeater and Sensor-based) ACDs that work on the principle of Distributed Control Systems

z ACDs interact en-route with each other through radio communication within a radial range of 3 Kms

z On-board computers use input from GPS system for determination of Train location, Speed, Course of travel and Time

ACD Network (Raksha Kavach) Technology

z Mobile and stationary components of ACD Network exchange information and take decisions based on train working rules embedded in software to apply brakes automatically without any input from the users

z If 2 ACDs are deemed to be at a risk of collision, the ACD system activates automatic braking operation to prevent collisions

z Loco ACD is designed to interface with various types of braking systems of Locomotives

ACD Network Implementation Plan

z ACD Survey & Route Designz Manufacturing and Installation of ACDs with

accessoriesz Commissioning of individual ACD installationsz Training of Personnelz Configuration & Customization of ACD route

during Incubation periodz Commissioning of ACD Routez Post warranty Annual Maintenance (if required)

ACD a Visual

Thank You...

Anti-Collision Device (ACD) Network(Raksha Kavach)Train Collisions - A Challenge Accepted WHAT IS AN A C D ?Inside the ACDWORKING OF AN ACDA C D -AN OVERVIEWSalient Features - What ACD CAN DOSalient Features - What ACD CAN DOSalient Features - What ACD CAN DOACD Network CAN NOT Prevent a Train Collision whenACD Network (Raksha Kavach) TechnologyACD Network (Raksha Kavach) TechnologyACD Network Implementation PlanACD a VisualThank You...