Intrusion

Located in a cozy office or any other place of work you must pay attention to all these things are not clear on the doors, walls, windows and ceiling. So, these things help to keep your property, valuables, and even life.

Today I will try to explain how these things are arranged, what are they for and how it works. Sometimes it just happens not more than aware of the nature of things that surround you. Under the cut bukaf many useful images, and traffic.




A few words about the alarm

Alarm is autonomous and console. Autonomous alarm will not withdrawn, maintenance and control is the master, authorized person or a working staff of the protected object. Panel protection is connected to the central monitoring of private security personnel on duty, fire department or the state of the private security company (PSC), as a rule, through the PBX or radio channel.

Security alarm system has three protective boundary that use sensors of its type.
1 mark - Perimeter protected object (windows, doors, walls) 2 line - interior objects (apartments, offices, garages) 3 milestone -'s indoor (safes, paintings and other valuables) The type of fire detectors are also divided into several group, select the 3 main that occur everywhere.
Heat Hand Smoke

Control Panels



Led alarm systems are Control Panels (RCP), they in which case include sirens, voice notification, and "cause" police and firefighters. These devices monitor the status of your input devices (SHS), which can be many. In cables connected sensors (detectors) security or fire, which may also be a dozen. In the case of activation of sensors can (depending on the sensor type and method of connection) or NC loop. Usually at the end of the loop connected terminal element (FE), the role of which can play a diode, a capacitor, and in most cases, as a rule, the resistor specific denomination - a protection against possible failures of sensors and competent hackers, who try to close the loop. Increasingly in modern devices terminating element is informative, to inform about the various failures in the loop.



PEP should be obtained to train did not go for a set nominal terminal element, otherwise the panel "think" that the cable is not working properly and to include display or broken and will go into alarm simultaneously manipulating its output.
Outputs panel also vary, the most important of them - this is a common switch, radio transmitter, RS-485, various signal-starting devices. Output panel can even be another train control panel. One panel outputs can be simultaneously several types.
A characteristic feature of the device is also a way to control.

Thus, the panel differ in the number of loops, these denominations OE cables, control method, the number and type of outputs.

Common detectors

The detectors are designed to record certain events and communication of control and indicating equipment. To do this, they are equipped with a relay output, radio transmitter, or RS-485 (addressable detectors). The detectors can also be autonomous, ie not work with the panel and have their own tools for the light and sound alert when triggered. Some can be combined and have the characteristics of several types of detectors simultaneously. Most detectors are equipped with anti-tamper, many also require a separate power supply.

QMS



Alarm magnetic pin. It consists of two parts - a reed switch and magnet. Reed switch getting into the action of a magnetic field closes its contacts. Mainly used on doors and windows, has different versions for the appropriate conditions. Now you know where to get the magnets.

Intrusion acoustic



Consist of a microphone and transmitter. Record the sound of breaking glass. To reduce false positives from extraneous sounds - set to a certain range of sound frequencies. Many allow you to adjust the sensitivity of the detectors, equipped with display events and drawdown can store in memory.

So-called "obemniki"



By "obemnikami" taken to imply - motion. The most common infrared and radio wave.
The principle of the IR sensor based on registration of change of the thermal background in the area of ​​the sensor per unit time. Thus it is not recommended to direct or installed where possible by frequent changes in temperature (radiators, vents, windows).
In the radio wave detector incorporates the principle of detecting human registration Doppler shift of the reflected microwave (RF) signal that occurs when the person moves in the electromagnetic field generated by microwave module. Such sensors can be masked by the obstacles of material leaking radio waves. (Original and more)
Some "obemniki" allow to protect the premises located inside pets. Many detectors also allow you to adjust the sensitivity, equipped with display events and drawdown can store in memory.

Smoke Detectors



Smoke optoelectronic fire detector. Designed to detect fires, accompanied by smoke in enclosed spaces. The principle of the detector is based on recording the change in optical density of the air per unit of time, with the typical smoke threshold. Alarms accompanied by the inclusion of an integrated optical indicators (LEDs).
The reason for switching can also be dust and bugs trapped inside, so at least twice a year such detectors require inspection and cleaning.
In the case of false alarms is not too lazy to pay attention to LEDs such sensors, remember that which he burned and specify the service personnel. This will save you from future headaches.

Fire alarm heat



Record the temperature rise in the room above the threshold. Older models were only a two electrodes alloyed low temperature solder. Modern designs are more reliable and have a resistance thermometer or thermal relay. Each detector is set at a certain temperature rating. Some have LED indication and can visually identify the drawdown of the individual detector.

Manual fire alarm



In case of fire are activated manually. Typically installed at the exits.
At first, once put into operation in Russia, the detectors were only a sanitized button, and inquiring minds compatriots, and someone just out of malicious motives, did not allow the fire service no rest day or night. A little later, in order to win mentality, were commissioned detectors equipped with detailed information on the use of the right to housing, and some also equipped with a device for sealing.

The alarm

I almost forgot. In contrast to the security and fire alarm systems, alarm just over fully intended to protect people from their own kind. The most widespread panic buttons of various types and designs. Button first, equipped offices, button located under the tables, sometimes it was a special pedal. Then were equipped with point of sale of alcoholic beverages, the guards appeared portable remote radio controls. Then schools and preschools - especially this impact event occurred in Beslan. Now the buttons are used everywhere, shops, offices and state. institutions.
And thanks to the alarm you can do interesting things.

Afterword


Always moved by the movie, where with the help of unimaginable devices and high-tech group of brave guys safecrack federal banks and quite noticeably eluded the guards with all good
The truth is in fact likely to have such heroes will only attempt, if that will not help them pofigizm security company and staff apathy. It happens that the employer himself chasing cheap and gets in the end the project with cheap raw nameless alarm devices, with constant false positives and a lot of other headaches.