In order to overcome the shortcomings in the currently available detector devices, including their tendency to give false alarms, scientists at the Central Scientific Instruments Organisation (CSIO), Chandigarh, have developed a fibre optics fencing system to enable efficient detection of intrusion on the geographical borders.
The new prototype of auto-thresholding smart fence is indigenous, reliable with high detection rate, immune from electrical interference or weather disturbances, and stated to have negligible false alarm rate.
Speaking on the sidelines of the recently concluded 73rd CSIO Foundation Day, a senior scientist, Dr Navneet Singh Aulakh, said that such systems had been developed earlier. However, the present one addressed the lacunae which existed in the previous ones.
The currently available fencing systems have a tendency to give false alarms in case of any weather changes, be it rain or wind. In such cases, it becomes easier for the infiltrators to cross the borders. However, the new prototype of smart fence does not emit false signals, say the scientists.
“It has 100 per cent detection rate, negligible false alarm rate and low sensitivity to weather conditions. It will only respond to enemy intrusion and alarm activation will only be by direct assault. Even if we consider the possibility of a false alarm once, its settings can be adjusted not to react. The next time, the same effect is reported. So, it is made to learn accordingly,” said Dr Navneet Singh Aulakh, senior scientist, CSIR-CSIO, adding that unlike other systems, it is not prone to short circuits.
The system comprises field fibre net which is a foldable net made of cord-type optical fibre cable formed into squares which are crossed at each joint by a plastic crossover button, a zone processing unit, which sends intrusion detection signals to the front panel display. The zones are continuously monitored and each time it generates an alarm, the security can be alerted. Any attempt to cut, tamper or climb the net causes intensity variation due to disturbances created in the fibre which trigger the alarm. If there are any CCTV cameras near by, then they can be adjusted to capture the infiltration and take action accordingly.
Ranging from geographical borders of the country, banks’ wall-embedded systems, naval dockyard underwater systems, airports, transmission towers, underground prisons, anti-digging systems, explosive storage areas, ammo dumps explosive storage sites, the system can be installed in various areas, be it underground, underwater, combustible areas, desert areas and snow-bound areas. It is also safe in high EMI environment and withstands UV radiation.
Apart from being safe and easy to install, scientists say that it is corrosion-resistant, dust-proof and weather-proof. A Bangalore-based V M Tecknologies has also shown interest in the transfer of technology, and is currently in talks with CSIO for this purpose.
“We are focusing on building products and bringing technologies, which can finally be used for the larger benefit of society,” said director, CSIR-CSIO, R K Sinha.