Intrusion alarm

Alarm systems can be integrated with fire detection systems, intrusion detection systems (IDSs), access control systems, or closed circuit television (CCTV) systems, so that these systems automatically respond when the alarm is triggered. For example, a smoke detector alarm can be set up to automatically notify the fire department when smoke is detected, or an intrusion alarm can automatically trigger cameras to turn on in a remote location so that personnel can monitor that location. 

An annunciator responds to the detection of an event by emitting a signal. This signal may be visual, audible, electronic, or a combination of these three. For example, fire alarm signals will always be connected to audible annunciators, whereas intrusion alarms may not be. 

Nonmilitary infrared applications for germanium include C02 lasers (qv), intrusion alarms, and police and border patrol surveillance devices. Germanium is used as a thin-film coating for infrared materials to decrease reflection losses or to provide heavy filtering action below 2 Jim. 

AR541 5.44 Perimeter intrusion alarm systems (Revision 2, ML003740097 Revision 3, ML003739217)... 

Room 105/106 has been established as the Operations Center for the HCF, and is the normal route for entry and exit from the HCF. This Center serves as the focal point for communications to personnel working in the facility. HCF system status and radiological conditions are monitored and displayed at this Center. Additionally, there are diverse and redundant modes of communication throughout the facility, under both normal and emergency conditions. There are three communication systems used in the HCF (not including radiation, fire, or intrusion alarms) (1) a telephone system, (2) a public address (PA) system, and (3) an intercom system. 

Today, infrared LEDs are used in a wide variety of applications, where they are typically paired with photodetectors. Infrared flux emitted by an LED source is transmitted a distance ranging from a few millimeters to many meters, and at the receiving end a photodiode or phototransistor detects the flux and converts it to an electrical signal. Silicon devices are most commonly used to detect the light emitted by Al Gai-xAs DH LEDs. Photodetectors made from In Gai-xAs are used with Ga Ini- AsyPi-y LEDs. Such emitter-detector pairs are used for the remote control of televisions and other consumer electronic products. Other applications for infrared LED-detector devices include intrusion alarms, blood gas analyzers, bar code readers, limit switches, and shaft encoders. 

Install an intrusion alarm on all doors of the 105-N building that are not secured (bolted shut) from the inside. 

The evacuation alarm is actuated by excessive radiation level in the Laboratory. The pool level alarm indicates a pool level that deviates by more than two inches from normal level. The third alarm is the intrusion alarm which is actuated by opening of any door, window or access point on the roof. In addition, sensing wires in the metal mesh covering the windows will break and initiate the alarm if an attempt is made to gain access to the window. The intrusion alarm has a standby power source and will remain effective for at least eight hours in the event of a power failure. The intrusion alarm is active during all non-working hours. It can be defeated only from within the Reactor Laboratory. 

The intrusion alarm, including its connections to Police and Security Headquarters, is tested once per week, typically on Friday. 

Fuel elements measured for bow and elongation Intrusion alarm checked... 

Motion Detection, Intrusion Alarms, and People Counting... 

Intruder alarms are designed to give a warning of the presence of an intruder within or attempting to enter the protected area. Alarm systems may act as a deterrent to the casual or opportunist thief but they will do little or nothing to prevent a determined intrusion, and to be effective they must provoke an early response from the appropriate authority (in most cases the police). The warning may be a local audible device, but normally the alarm signal is transmitted by the telephone network to a central station operated by a security company on a 24-hour basis. 

Keywords wireless sensor network detection theory Kalman filtering target intrusion detection false alarm. 

The system parameter values depend on the particular application. When a house or a factory is to be monitored for intrusion detection, the cost of false alarms is relatively low. On the other hand, the financial and personnel cost of a false alarm is significantly higher when the perimeter security of a nuclear reactor is to be provided by deploying a SWSN to monitor unauthorized access. The cost of a false alarm might involve the transportation of special forces and/or personnel of related government agencies to the site, as well as the evacuation of residents in the surrounding area. 

To sabotage the system, the former employee set the software on his laptop to identify itself as a pumping station, and then suppressed all alarms. The former employee was the "central control station" during his intrusions, with unlimited command of 300 SCADA nodes governing sewage and drinking water alike. 

Dual technology devices Incorporate two different types of sensor technology (such as PIR and microwave technology) together in one housing. When both technologies sense an intrusion, an alarm is triggered. 

An exterior intrusion sensor is a detection device that is used in an outdoor environment to detect intrusions into a protected area. These devices are designed to detect an intruder and then communicate an alarm signal to an alarm system. The alarm system can respond to the intrusion in many different ways, such as by triggering an audible or visual alarm signal, or by sending an electronic signal to a central monitoring location that notifies security personnel of the intrusion. 

European standard EN 50131-1 2006. Alarm systems - Intrusion and hold-up systems - Part 1 System requirements. Brussels European Committee for Electrotechnical Standardization CENELEC. 

Working on the basis that necessity is the mother of invention a new anti-intrusion shell product from RocTool would appear to satisfy a number of needs. The shell, using reformulated conductive polyester composite material, incorporates a smart card within the moulding which, in the event of threatened integrity, can transmit information. Typical product applications include the transport of hazardous or sensitive materials, protection of electronic equipment, security of buildings, the ensuring of system integrity in IT systems and for double protection in an alarm system. 

Abstract. The trend to compose real time systems with standard IT known from conventional office domains results in heterogeneous technical environments. Examples are modern industrial process automation networks. It is a challenging task, because of potential impacts of security incidents to the system safety. For example, robot control rmits could be manipulated by malicious codes. The term risk communication is introduced, to describe alarm communication in hmnan-machine interaction scenarios. User adapted risk communication between humans and industrial automation systems, including home robotics, can prevent hazards and/or threats to the entire system safety and security. Current safety and security risk communication standards are compared to examine the adequacy for our uniform approach. This paper focuses on alarm system standards in the industrial process automation domain and intrusion detection systems from the conventional desktop IT domain. A uniform model based approach for risk communication in distributed IT enviromnents is introduced. 

In this paper a selection of current safety and security risk communication standards and recommendations are compared using selected evaluation criteria. We focus on alarm system standards in the industrial process automation domain and intrusion detection systems known from conventional desktop IT... 

ISO/IEC DIS 27039 Information technology - Security techniques - Selection, deployment and operations of intrusion detection systems (IDPS) (July 2013) VDI/VDE 3699 Blatt 5 Process control with screens - Alarms/messages (German Draft) (May 2013)... 

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