Protecting large, high value assets on oil and gas sites is essentially about establishing an impenetrable perimeter using a combination of high end security systems and making them work together perfectly, delivering all relevant data instantly to security staff in a readily understandable form. The whole system has to be capable of surviving serious mishaps and failures and be fully functional 24/7. For the CCTV manufacturer and system integrator the major challenges fall into three areas, achieving seamless integration, continuous availability and reliable intelligent assistance. Here we look at some examples of successful current approaches.
The basic problem is how to make different types of security equipment which use different proprietary communication standards and operating philosophies, communicate with each other perfectly and work together in complete harmony. The best solution to this is to introduce software which generates a new universal environment for all security system components and a new unified interface for humans.
This so-called ‘security management software’ (SMS) uses standard TCP/IP protocols, runs on conventional computer infrastructure with client/server architecture, and provides software interfaces for security solutions of all kinds. In effect it provides all the interpreting services needed for two-way communication between each of the different peripherals and the system’s programmable logic controller (PLC), the system’s decision-maker.
But besides this, SMS can manage the execution of complex, automatic procedures involving a large number of different sub-systems and interfaces, and provide event summaries, relevant pictures and pre-history to the user’s screen in a readily digestible format.
Distributed client/server structure allows for an almost unlimited number of users and workstations, and also enables the handling of multiple alarms and alarm responses simultaneously.
SMS can turn complex, restrictive structures into open flexible environments and make it easy to introduce new systems and developments now or in the future. Crucially, by eliminating compatibility problems, it allows planners and designers to choose equipment solely on the basis of best performance.
24/7 availability can be supported by an SMS redundancy module which provides software duplication, as well as intelligent monitoring and redundancy management functions. Then, with multiple servers managing multiple software clients, and all servers observing each other, if a fault is detected, the relevant functions are immediately transferred from one (soft- or hardware) component to another, so that no service is lost.
Where large numbers of cameras and other security detectors are employed, reliable discrimination between real risks and other spurious alarms is crucial if the security staff are not to be burdened or distracted by unnecessary system-generated events.
Traditional high-end video motion detectors have proved themselves extremely efficient at detecting movement in specified zones and very good at eliminating the effects of global environmental changes. Video analytics on the other hand, is good at recognising different kinds of specified objects by their size, speed, direction of movement and status and can trigger an alarm when a person moves fast, or a car goes in the wrong direction, but ignore a car going fast, or a person going in the wrong direction, or action in the wrong part of the scene.
But now there is also a third option which has been proven to get very, very close to the ideal situation of no unwanted alarms.
The Dual-Sensor concept as developed by Geutebruck is a combination of both technologies, arranged so that they both play to their strengths. So for example, a bird which meets the VMD system’s movement and location criteria, may not match the VA’s specific size threat criteria, so no combined system alarm is issued. And though the wind deflecting foliage may deceive the VA into registering the shape of a person or a car, the VMD still does not react, so no alarm is reported. This software-only product runs on the GeViScope CCTV platform where each video channel has its own digital signal processor, so there is adequate capacity and flexibility to carry out whatever individual signal processing is desired. [www.geutebrueck.com]