Optical-electronic detectors in the fire safety system

These devices include a processor and devices with optical functions. When they detect violations, they send a signal, and an electronic system that can be purchased at https://www.oc.com.ua/catalog/ppk_satel/ it accepts and processes it. These devices are used both in fire protection and security alarm systems.
Their main advantages:
• efficiency;
• different combinations of research places;
• cheap cost.
They work in the range of infrared radiation and are divided by purpose, area of ​​use, and features in work.
Passive
They are used in security systems. How the advantages stand out: extensive territory of use and low price. They work on the basis of studying the difference in changes in the system, which Fresnel lenses produce.
The infrared beam is received by the section that produces the action and the final data is formed by the device.
And to increase stability, productivity and fluctuations, a microprocessor signal analysis is used.
Active
The work is carried out with the help of the estimation of changes in the beam and its intensity, which are processed by the transmitter. The components of the structure are located in different housings and are attached face to face. The distance that remains between them is under their supervision.
Along with them, there are annunciators with an address, equipped with electronic annunciators with an optical system. In addition to transmitting the message, they transmit the individual code of their product.
Thanks to this, accurate location detection is established, up to the mounting point of the electronic device itself. The high price justifies its functions.
There is also technology using address and analytics. It transmits the information of the scanned parameter, and the receiving system of the control device transmits the notification, such sensors are used mainly in fire protection systems.
Optical-electronic security detectors
Their methods of operation are described above. Detection zones can occur in different variations:
• detection by volumetric method;
• linear detection using a beam system;
• surface detection - "curtain system".
Active sensors work using a beam system.
They can be combined in one word - "motion sensor", since they react precisely to a change in location. The "curtain system" method and the use of a beam system can be attributed to the phrase: "intersection of the location".
The use of such notification systems creates a blockage in a closed-type place, while a linear design system is used at points located on the street. To increase efficiency, you can use devices that pass several barrier beams.
To prevent areas in the shadows, it is more convenient to use ceiling annunciators.
For proper operation, the following conditions should be observed:
• do not expose the receiver to direct sunlight and its glare, as well as other sources;
• do not allow the action of different temperature currents and other wind sources.
This does not apply to detectors of the active type, but they have their own drawback, this is the regulation of the optics device. In most cases, those that are designed for long-term action.
All of the above detectors can be installed on capital structures to avoid vibration.
Optical-electronic fire detectors
These detectors react to the action of the smoke stream. They are installed, like all the others, separately or in line.
In terms of operation and signal definition, they, like all others, are analog, threshold, addressable, and addressable-analog.
Separately installed units include a block that reacts to smoke. Two emitters fix the infrared beam, and the system fixes it.
They are used in retail outlets, hotels, schools, hospitals, etc.
The method of combining and exchanging information with the devices of the entire system can be wired or wireless.
For the fire safety system, these sensors are universal and can be used to solve the safety issue.