Author Topic: A Real Time Hi-Speed Tracker for Chain Snatcher  (Read 3301 times)

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A Real Time Hi-Speed Tracker for Chain Snatcher
« on: November 23, 2011, 07:42:06 am »
Author : B S Manusudhan and S Sowmyasudhan
International Journal of Scientific & Engineering Research Volume 2, Issue 10, October-2011
ISSN 2229-5518
Download Full Paper : PDF

Abstract-The word that is rampant in newspaper, television channel and in all our lives is “Chain snatching”. This is one of the crimes which are increasing as the river flows downstream. Back -to- Back chain snatching in the city put the cops on their toes. Even as chain snatchers go about their job with the spirit catch-me-if-you-can, police are working over-time to dent that spirit, but to no avail. Observing that the robberies have increased over the years, there is also a raise in chain snatching incidents. Thus chain snatching has become an urban phenomenon. Even though many cases have being lodged in the police station, but a very few cases have been solved, and many of the cases are still under investigation. In day-today newspaper by default front page reads “again a chain snatcher strikes the city”, a serious threat that scares the public to walk in and around city is “Chain snatching”, and has become a challenge for the Police Department in capturing the culprits. We being an engineers, there is no other Nobel way to thank our society, than giving helping hands to the society. So we came with an innovative idea of implementing a smart electronic gadget, so called, “ARM IMPLEMENTATION FOR REAL–TIME HI–SPEED TRACKER FOR CHAIN SNATCHER”. This innovation also pulls down the anti-social activities in public places.

Index Terms- MEMS Sensor, Speech Processor, ARM controller, Emergency Protocol, Public and Police end user, Wireless Communication, Track Down.
The idea of our project is based on the news related to chain snatching which we often read in the newspapers as shown below.
                      Figure 1: News Paper Articles
These types of incidents are generally carried out by first time offenders who generally look like students and hence it’s difficult to track them .Security measures taken by the police department includes only “Beware of chain snatchers” signboards in and around the city which includes some tips to alert the public.

The aim of this project is to develop a low power smart electronic gadget that is capable of tracking the chain snatcher and alert the police through the Real time transmission of video signals of the scene of crime which helps in solving the complicated cases. It also reduces many kinds of crimes taking place in and around the city and hence provides security for the public.The project design has two parts; a Public end device (Smart electronic gadget/Transmitter) mounted on the KEB pole and the Police end device (receiver) located at the police control room. The Public end device comprises of an ARM7TDMI-S (HOST), speech recognition unit and various peripheral units such as Night vision thermal Camera, LDRs, RF transceivers and Zigbee transceivers. The Police end device consists of a television/PC to display the real time video which is being captured by the transmitter section (Public end device/ smart electronic gadget).The Public end device is located at the top of the lamp post and Wireless Sensor Networks (WSN) the entire city but alarms only the nearest police end device and the Police end device is located at the nearest police control room.  The smart electronic gadget gets activated whenever the crime occurs and communicates with the nearest corresponding gadgets depending on the movement of the culprit and transmits an emergency signal to the nearest police end device.

2 Schematic Layouts -Smart Gadget (Public End Device)
The design consists of the ARM controller based system with peripheral devices and the speech processing unit as shown in Figure. The speech processing unit triggers the ARM controller which in turn activates the various peripheral units with which it is being interfaced with. DC regulated power supply of 12V is given to the speech processing unit and the ARM controller. The power supply requirement for the operation of the peripheral units is fulfilled by the host processor.

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