Motion sensors are able to cover and monitor vast spaces, due to which they are widely used to protect various types of premises - residential, industrial premises, shopping malls, educational institutions and other facilities and enterprises. The motion sensor is an integral part of burglar alarms, has a moderate cost, easy to install and operate. The detectors do not need constant maintenance, while they are able to work continuously for a long time.
The design of the device allows you to cover a large sector, depending on the range, vertical and horizontal viewing angles. If a moving object enters the territory controlled by the detector, a relay is activated, which in turn triggers an alarm - the sound of a siren, the inclusion of a searchlight, an alarm signal, and in certain cases, the launch of a striking device.
Content
Manufacturers offer many different modifications of this type of equipment that perform the same function, but differ in the principle of operation.
Thermal, or infrared sensors, have a high sensitivity PIR sensor that can instantly detect infrared radiation from an animal or person. The angle of the detection zone of a moving object reaches 120 degrees, the range is from 10 to 15 meters.
Ultrasonic, or acoustic detectors, by their principle of operation, resemble a sound locator. The sound vibrations emitted by the generator, inaccessible to human hearing, are reflected from moving objects. After that, the oscillation frequency changes. Due to the difference in frequencies arriving at a special receiver, the signaling device is triggered.
Microwave, or radio frequency detectors, have the same principle of operation as acoustic (Doppler effect), however, in this case, the generator broadcasts microwave radiation, not sound. When the frequency of the radiation reflected from the detected object changes, an additional device is triggered.
Motion detectors designed to protect the perimeter are slightly different in technical design from those listed above. The design of such sensors is characterized by high reliability, the possibility of continuous operation regardless of weather conditions and air temperature. Such detectors are resistant to external interference and rarely show false alarms. The controlled space can have a complex configuration, a large area, or consist of several sections of different areas, so the following types of detectors are used to protect such areas:
Seismic detectors record vibrations in the soil, the vibration that is generated during the movement of a person or animal. Devices are used in certain natural and temperature conditions - frozen ground makes it difficult for devices of this type to work.
Infrared - popular and widespread due to the low price, strength and durability of the structure, as well as ease of installation. Setting up IR detectors allows you to increase or decrease the sensitivity of the device, as well as limit or completely prohibit the operation of objects with a small weight, having a small mass.
Magnetic devices record changes in the magnetic field in the controlled area. But, due to the low sensitivity, devices of this variety, they are of low popularity.
Laser (beam) detectors have established themselves as the most reliable devices. The design of outdoor laser detectors consists of a transmitter and a receiver, and the beam is invisible to the naked eye. When an object crosses the laser beam, the receiver detects its disappearance, after which an alarm is triggered.
Laser beams pass through several levels at once, they cannot be seen, which means it is impossible to go unnoticed through such a sensitive and complex security system. Laser detectors operate over long distances between transmitter and receiver (200 meters on average). Setting the device allows you to exclude the alarm for minor short interruptions of the beam, which can be caused, for example, by falling leaves.
Also, it is worth considering in more detail autonomous (wireless) IR motion sensors. Detectors of this type are an independent security device used when it is impossible to install a standard security alarm. Such a device is powered by a battery, and communication with the main device occurs via a radio channel.
Standalone sensors are multifunctional, easy to install, and capable of transmitting a signal over a long distance. Such a device can be placed anywhere in the room, without worrying about hiding cable lines, as is the case with wired detectors. Therefore, such a device is suitable for monitoring rooms, the design of which cannot be violated. Also, autonomous devices are suitable for protecting small premises, for example, for a garage, summer house, garden house.
Also, an autonomous sensor has a connector for connecting an additional device, for example, a magnetic contact sensor that detects the door opening. Sophisticated models of wireless detectors can be additionally equipped with the following:
Wireless motion sensors are indoor and outdoor. The latter have a durable, sealed housing, reliably protected from negative environmental influences (rain, snow, fog, low and high temperatures). Outdoor units are usually mounted on swivel brackets that come with the main unit. This mount allows you to choose the best viewing angle.
Specifications:
Reliable and durable wireless IR motion detector designed for indoor applications. Suitable for home and office.When mounting the equipment, make sure that the beam is not blocked by foreign objects (furniture, plants, curtains and other objects). At the same time, the space within the field of view of the detector must also be free from windows, air conditioners, radiators or other heating devices.
The average cost is - 1,600 rubles.
Specifications:
The model is a street motion sensor equipped with a solar battery. The design of the device is designed for vertical mounting, on walls or on poles using a separate mount. Installation height varies from 1.8 to 2.4 meters. The detector does not respond to animals and moving objects weighing up to 15 kg, as well as up to 36 kg. The sensitivity level can be adjusted. Also, the device is equipped with an anti-sabotage function - in case something interferes with the operation of the sensors, it signals this. Additionally, the case has a protective visor.
The average cost of the detector is 2,690 rubles.
Specifications:
Compact wired IR sensor with a wide viewing angle (110 degrees). The case of "ALPIR-10" is made of ABS plastic, this material is resistant to environmental influences - humidity, high temperatures. Installation of the product does not require special skills, even beginners can handle the installation. Thanks to the wired type of connection, uninterrupted operation of the device and a stable signal supply are ensured.
The average cost is - 560 rubles.
Specifications:
The kit includes:
"Millenium Alarm 300D" is an acoustic motion detector suitable for use at home, in the country. When a moving object is detected, the detector beeps.
The body of the product is made of plastic, the dimensions of the device are compact, so it is not too noticeable. Installation is simple - the device must be placed in the desired location and connected to the power supply (powered from the mains through a special adapter). If power outages occur, the Millenium Alarm 300D can operate autonomously from batteries.
The detector is equipped with 6 detection sensors, and is able to scan an area with a radius of 360 degrees, the detection range is 15 meters (in open space). At the same time, it can catch movement through wood and concrete (up to 180 mm thick).
It is also worth noting that the product has 8 volume levels and 3 types of emitted signal with a 3D effect (dog barking, police siren sound, and others). Modes, signal volume, turning on and off can be done using the remote control, the range of which is 50 m.
The average cost is 2,750 rubles.
Specifications:
"PATROL-USR" is a combined sounder. It fixes and signals about the appearance of a moving object on the territory, as well as about the destruction of laminated glass of any type (including double-glazed windows and glass blocks installed in the room). The device is equipped with an anti-masking function, which captures attempts to disrupt the operation of sound sensors.
PATROL-USR captures high-frequency sound signals that occur when breaking glass, and also detects changes in the frequency and length of sound waves when reflected from moving objects (Doppler effect). The device is a universal protection for all types of glass, therefore it has a wide range of applications. The sensitivity of the detector can be adjusted, in addition, the device automatically adjusts to the environment.
The average cost is 2,371 rubles.
Specifications:
Compact laser IR sensor with a detection radius of 20 meters (in open space) and 10 meters (indoors).Due to its small dimensions, the device can be mounted in living rooms, country houses, as well as offices, warehouses and other commercial premises. "KARKAM IKB-01" is equipped with a built-in self-regulation system - this is a modern signal processing system, in which the device independently adjusts to environmental conditions. Thanks to this function, "KARKAM IKB-01" eliminates false alarms during such natural phenomena as rain, snow or fog.
The high-strength case has a degree of protection IP 55, which prevents moisture and dust from entering the device. When mounted outdoors, the sensor can work properly at very low temperatures (from -40 degrees), as well as at very high temperatures (up to +60 degrees).
The average cost is - 1,590 rubles.
Specifications:
The kit includes:
Wireless motion detector with microwave sensor that does not react to pets. Detects the movement of a foreign object in a controlled room due to temperature changes. At the same time, it is configured to respond only to a person, ignoring objects weighing less than 20 kg and less than 50 cm tall.
The device quickly detects a moving object and instantly signals an intrusion. The channel through which Ajax MotionProtect Plus transmits alarms is protected from scanning and jamming. Also, the product blocks interferences that are created by household appliances, the thermal radiation of an air conditioner, a fireplace, as well as those arising from drafts, the movement of curtains, blinds and other objects.
The model is issued in the black case protected from opening. Designed for wall mounting. The product is completely ready for installation, mounted on a vertical surface using the Smart Bracket mount. When adding a device to the Ajax Hub security system, it is enough to scan the QR code in the mobile application.
The average cost is 4,060 rubles.
Equipment for the protection of premises must comply with the conditions of the controlled space:
When mounting motion sensors, it is recommended to follow the instructions attached to the product and other technical documentation. It is worth noting that most of the devices are mounted at a corner, between walls, the mounting height is usually from 180 to 220 cm. Swivel brackets allow you to adjust the most effective viewing angle of the territory. Sensors mounted indoors must be installed so that the viewing angle covers all areas of possible penetration (windows and doors).