Network Video Technologies' (NVT's) unshielded twisted pair (UTP) surveillance camera video transmission, has been employed to provide surveillance transmission at five aircraft service and maintenance hangers at King Khalid International Airport.
Located 22 miles north of Riyadh, Saudi Arabia, as part of a comprehensive airport complex that includes three terminals, a control tower and two parallel runways, the five specially equipped hangers are used to carry out repairs and scheduled maintenance on a variety of international and national airlines' aircraft.
With more than 10,000 square meters of floor space each, the five service hangers can cater to aircraft as large as the latest Airbus A380, Boeing 747-400, or multiple single-engine light aircraft. Assisting the provision of effective health, safety, fire prevention and security procedures at the massive complex, an NVT-based surveillance system has been specified and installed by the Modern Buildings Group. “We planned to use surveillance images from the system for a variety of roles, including security, health and safety and fire/smoke detection via the use of video smoke detection units, so the quality of video we required from the cameras was of great importance,” said Mohammad Amin Almatt of Modern Buildings Group.
“Employing a traditional coaxial-based system at the site would have proven very costly, time consuming to install, and would have meant that an individual fused spur power outlet would have been needed at each of the 25 internal and 10 external camera locations. This would have added significant supplementary costs in equipment and installation time.” “Additionally, camera locations ranged from 200 meters to one kilometer in end-to-end transmission distance to the onsite control room. Employing coax over these distances would have been detrimental to the camera image quality in this mission critical system.”
Utilizing NVT power, video and data technology, the Modern Buildings Group engineers were able to provide each camera in the system with low voltage power, transmit fiber-like quality to the control room and provide camera telemetry, all via a Cat5 UTP network contained within each hanger's structure. From here, a 25-pair Cat3 UTP backbone is used to transmit images from each hanger, back to the centrally located equipment and control room.
Protecting the perimeter of each hanger, Pelco PTZ dome cameras with UTP outputs are situated on the exterior corners of each hanger. Images from these cameras are used to monitor the hanger environment for any possible unauthorized entry, and to ensure health and safety procedures around the hanger are adhered to.
In addition to onsite monitoring and recording via the control and DVR technology, the images are also monitored by electronic video smoke detection software. The system was developed to overcome the difficulties encountered in environments where traditional forms of smoke and flame detection are considered to be ineffective or impractical such as the aircraft service hangers. False alarms could be frequently created as a byproduct of everyday onsite processes.
“Using NVT technology we were able to provide both the DVR and video smoke detection devices with conditioned, interference free video. Thanks to the continuous and automatic conditioning of the video signal via the NVT technology, the image quality remains consistent and unaffected by changing conditions, such as interference levels or changing lighting conditions – critical for these types of video analytic packages,” Mohammad Amin Almatt said.