Today, a video surveillance system is an integral element of a single facility security complex. Video control lines are installed both on strategically important large perimeters, and in apartments and houses so that personal property is safe. The latest technology allows you to install a wireless video surveillance system. It is not difficult to choose the right kit, you need to determine the tasks and goals of its installation, as well as familiarize yourself with the technical characteristics of all devices individually.
System features
A wireless video surveillance system is a camera that captures events. This device has a certain range. Everything that happens around is recorded on a storage device. Events are accompanied by sound.
In general, video surveillance is divided into digital and analog. Between themselves, they differ in the protocol that is used to transmit information. Today, these two complexes are increasingly being used in practice. Due to the mass of advantages, the wireless system is widespread.
Wireless CCTV cameras, as well as kits, are used in places where there is no way to connect electricity. Also, cameras of this type are used to monitor:
- various technical processes;
- stations
- bridges;
- highways.
They are installed in trading floors, in transport.
Principle of operation
Wireless camcorders are popular because they can be used almost everywhere if you need to do this unnoticed. The video surveillance system kit includes a video camera, which consists of:
- housing;
- a transmitter that is installed inside;
- recorder;
- receiver - receiver.
There is also a 12 V DC battery, antenna and cable. The latter is necessary in order to connect the receiver to the equipment. The recorder is responsible for recording video surveillance. The signal receiver is connected to a TV monitor or computer. Between them is a very powerful connection, which reaches several kilometers. If the camera is of excellent quality, then the signal calmly passes through all kinds of obstacles, be it:
- plastic;
- tree;
- walls;
- glass.
The location of the camera and its distance affect image quality.
Classification of Wireless Outdoor Video Equipment
Wireless camcorders are divided according to the principle of data transfer. GSM video cameras transmit data through a cellular channel. The range is limited to the coverage of the operator of a particular network. There are analog devices that operate on the principle of broadcasting.
There are Wi-Fi cameras that are represented by wireless IP cameras. The principle of operation is that they install such cameras in those places where there is access to the Network.
Benefits
A wireless video surveillance system has the main advantage, which consists in the fact that the equipment is installed without wires, there is no need to hammer the walls, make channels for wiring in them. This is very important when building an internal video surveillance system. This type of camera is easy to install, they can also be quickly moved to another place and fixed there. If you need to expand the surveillance zone, it is possible to put additional cameras and change system settings.
disadvantages
It should be noted that wireless video surveillance also has disadvantages. They are less protected, the signal stability is affected by weather conditions, WI-FI frequency congestion, interference that occurred on the signal transmission path. For example, the presence of large reinforced concrete structures nearby that can absorb it. A problem such as congestion is often noticeable in office buildings and high-rise buildings.
Mounting Features
When installing a wireless video surveillance system for a private house, all cameras must be installed around the perimeter of the territory. It is necessary that the entire area be covered, there are no dead places. When creating external video surveillance, experts advise using wireless cameras equipped with motion sensors. This system significantly reduces power consumption and records extremely useful video material. The operation of the entire system depends on the correct placement of the cameras. It is forbidden that light from spotlights, lamps or direct sunlight get into the lens of wireless CCTV cameras, otherwise the image will light up.
When installing the device on the street for outdoor monitoring, it is necessary to protect it from:
- mechanical impact;
- dust
- moisture
- frost.
The best height is 3 meters. If set too high, objects will be poorly visible, low - the camcorder can be broken or stolen.
When organizing the internal placement of a wireless video surveillance system for an apartment with a recording, one camera with a wide viewing angle is enough. But this is if the apartment has a small area. The camcorder should be installed in a corner on the ceiling. Windows from the device should be located behind or on the side so that light from them and the lamp does not directly enter the lens.
A good night shooting will be when installing a camcorder with high light sensitivity.
Dome cameras
Dome IP surveillance cameras are hemispherical. It provides the largest viewing angle. This device is equipped with a video module consisting of:
The camcorder has a swivel mechanism. This explains its maximum functionality. Such cameras should be used for operational monitoring. Often this device is equipped with a lens that has the function of changing the focus distance. This makes it possible to significantly detail the picture and change the viewing angle at the right time. These cameras have a number of advantages:
- strong case;
- excellent image quality;
- extensive viewing angle.
Some models are equipped with an infrared sensor, as well as a heating element. Thanks to the latter, observation is also possible at sub-zero air temperatures.
One of the disadvantages is the low transmission rate in the presence of multiple cameras. The spherical shape also slightly distorts the image. On the surface of the dome you can observe the display of infrared illumination.
Each manufacturer has its own video surveillance software for IP cameras. As a rule, software only works with their hardware.
Redmond SkyCam RG-C1S
The video camera is based on Wi-Fi wireless technology. The device has an unlimited range. It has a motion sensor that is controlled remotely from a smartphone via the R4S Home mobile app on Android and iOS. A number of cameras can be connected to one application. The main functions include:
- real-time monitoring and control;
- video recording;
- image safety;
- voice communication from two parties.
The camera displays high-quality sound and a clear color video.
IVUE B1, 1.0Mpx
One of the best wireless camcorders is IVUE B1, 1.0Mpx with automatic time-of-day switching. The camera resolution is 1 MPX, and the display resolution is 1280 x 720 pixels. It can be combined with iPad, iPhone and Android. It has infrared light up to 20 m for fixing at night and a built-in motion sensor. This device operates at temperatures from minus 30 to plus 50 degrees.
VStarcam C7812WIP
This camcorder stands out for its compactness and advanced features. It can be used with any video surveillance system. There is a built-in motion sensor. The installation process is quite simple. Viewing is carried out from mobile devices using Plug and play technology, HD video quality of 1280 x 720 pixels.
Ambertek DV135S
This type of camera is considered one of the best standalone CCTV devices. The mini-camcorder has a mount, which is very convenient for wearing on clothes. A device made of plastic and metal. It has an HDMI output that can be connected directly to the TV. The camera records video with a frequency of up to 60 fps and a resolution of 1920 x 1080 pixels. The built-in motion sensor, even when shooting at night, does not lose high sensitivity up to 5 meters.
Ai-ball blue
Such a miniature-sized Wi-Fi camera shoots video that can be viewed on a computer, as well as on Android and iOS mobile devices. Its dimensions are 30 by 35 mm. This is considered one of the advantages of the device. This model has a light weight. Existence of the Multiview mode allows to observe at once from several cameras.
MD81 Mini Wi-Fi P2P
This device is like a flash drive. Due to its very small size, it is easily attached to all horizontal and vertical surfaces, as well as clothing. She has a Wi-Fi connection, so this camcorder is compatible with all mobile devices.
Device selection
With an extremely reasonable approach to choosing a device, you can almost completely eliminate the influence of the negative features of these devices. There are several criteria that you need to consider when buying a wireless home surveillance system. When choosing between analog and digital, you need to keep in mind that the last received data is transmitted to a computer via Wi-Fi. They have a lot more video resolution. Analogue function with PAL or NTSC signals, connect directly to the monitor.
The angle of view and the focal length of the lens matter. Camcorders with a telephoto lens and a viewing angle of no more than 45 degrees are needed for shooting small spaces and remote monitoring. Devices with a short focal length and an extensive viewing angle provide a complete overview of the area. There are special cameras called varifocal. They can change the viewing angle.
If it is necessary to protect it from weather conditions and damage when installing an outdoor camera, then indoor cameras do not require a protective housing.
Important for video resolution is the number of pixels on which image quality depends. No less significant is the ability of the camera to function in a wide dynamic range, as well as the sensitivity of the matrix. The image quality depends on the photosensitivity of the camera and lighting. The higher the score, the better. A light sensitivity of at least 0.01 lux indicates that the camera is of high quality and can work around the clock.
Thanks to the WDR technology, the illumination of the background, darkened objects and faces is the same. This technology is available exclusively in expensive devices.
For night shooting, the presence of infrared light is important. The auto iris function allows the camera to switch itself depending on darkness or bright light. The more powerful the infrared radiation, the better.
The price of a wireless video surveillance system is affected by technical parameters, which are the presence of a motion sensor and Wi-Fi, range, viewing angle and photosensitivity.
Thus, wireless monitoring of the territory and the house allows you to protect yourself from outside interference and reliably protect your property.