Self-assembly of home surveillance system
To date, there are many ways and high-tech devices that allow self-assemble home comfortable, modern and multi-functional surveillance system. But, in order that the result met all expectations, the creator is first necessary to determine the characteristics of the system:
- the number of objects that will be monitored;
- number of cameras (via a camera can be monitored simultaneously for multiple objects);
- the distance from the cameras to the observed object;
- models of cameras and their location;
- method of video surveillance (remote, local);
- type camera arrangement (hidden, open);
- time video archive storage and so on. etc ..
The number of objects of observation
If you talk about the number of objects that fall under surveillance, then it all depends on the number of places in your area (in the house), which potentially can be expected to unauthorized penetration. The list can include other objects that are desirable to control for any other reasons. Some people are limited to installing a video camera at the entrance to a house. Someone, on the contrary, installs CCTV around the perimeter of the suburban area. In general, the number of monitored objects depends on the needs and concerns of the degree of the hosts for the safety of their property.
Denispnt (participant FORUMHOUSE):
Do not forget about the "face control zone". Be sure to put the camera in the place where the alleged abuser will close up.
A chamber located at the entrance, it is desirable to hide. You can use the design visor. With proper installation of the device, it will be protected from malicious impacts that entered the territory but has not yet hit the lens.
If it is impossible to hide a camera for technical reasons, you can buy a device with vandal-resistant. It is desirable to put these cameras on the street.
Determine the number of cells
The number of chambers in the system depends on the extent of the territory falls under observation.
Lastcorsair (Member FORUMHOUSE):
The number of cameras depends on your needs - what will it look. If the perimeter of the house - it means on each wall (in the corners). If a general overview of the site - on some of the posts, etc...
Accurately determine the number of cameras will help you plan the site, on which are marked all the building and observed the objects to scale. Knowing the angle of the image capturing cameras, it is possible to combine this data with the visual layout (it easily is drawn on its own), and to determine not only the number of cells, but also their locations.
The distance from the camera to the observable object
On which there is a distance between the observed object and the camera, the basic characteristics of the latter depend on: the camera resolution, the size of its matrix and sensitivity. Camera model should be selected, in consultation with professionals or qualified vendors. To be safe, go to the manufacturer's website and carefully study the characteristics of the model you are interested in.
The distance between the camera and DVR
Cameras are installed in home video systems, powered by mains 12 Volts (DC) and a voltage of 14 volts (DC). As a part of modern video surveillance systems there are also devices connected to the network 220 volts (alternating current), but they They are more suitable for large protected sites, and should not be considered as an option for the home system surveillance.
A substantial distance of the camcorder power supply leads to the voltage drop at the inlet to the consumer. Therefore, creating a surveillance system should pay special attention not only on the calculation of the appropriate power supply, but also to the educated choice for powering cable and video transmission. And for this it would be nice to listen to the expert advice:
Denispnt (Member FORUMHOUSE):
12 Volt power supply I recommend using if the distance from the cameras to the registrar no more than 50 meters. In this case it is possible to build special combined cable, which will save time and money laying tracks. Power 220 Volt have to be used when the length of the tracks more than 50 meters. If the composite cable will not work (there are interferences on coax), it would be better to put a separate feed line, and a separate video. With a length of routes over a hundred meters, I advise to transmit video over twisted pair, and power is put at 220 volts. Naturally, we must understand that nutrition should be a backup.
In order to provide a continuous video in terms of unplanned outage, must be selected power supplies capable in the absence of voltage in the network switch is powered by battery. These include special redundant power supplies used in home surveillance systems.
Given the uneven voltage drop depending on the distance of the camera, the most reliable power supply to device having a voltage adjustment. Using a complete unit with household voltmeter can easily obtain the desired amount at the inlet to the consumer.
Choosing a camcorder
Some people may be a question of choosing between analog, WI-FI and IP-cameras. Considering the main advantage of the latest, most experts recommend the establishment of a home surveillance system, which was originally equipped with digital equipment.
lambada (Member FORUMHOUSE):
At present, IP-cameras had time to fall in price, and it is wise to build a system based on them. Pros:.. Ease of installation and ease of supply of communications, and so on to the video signal, and the power may come at a cheap-UTP twisted pair. That is, in this case, we will significantly save on the lining of communications. Well, again, IP-cameras do not require frame grabbers, software exists in the free version, the server can also collect inexpensive. All this is easy to equip the UPS that will nourish both server and camera. At the exit obtain a cheap, resilient and high quality system with a simple configuration, exhibits high image quality.
As for cameras that transmit a signal via WI-FI, then read expert advice, professionally engaged in the installation of video surveillance systems.
Denispnt (Member FORUMHOUSE):
Wi-Fi in CCTV - EVIL! I advise you not to use or design of such systems. They exhibit poor resistance to interference, zero control signal reception, and while working there hanging equipment. In addition to that, Wi-Fi is now almost any school would open. In all of this without laying power cables in such a system is still not enough.
In order to at any time of the day (especially when there is no ambient light), the camcorder could clearly locking situation near the observed object, the device must be equipped with an infrared backlit.
DVR and hard drive
The DVR is used in both local and remote (composite) video surveillance systems. The latter allows to simultaneously receive the video on the screen of the remote computer or mobile device via internet connection. As a recorder, you can use a small computer or laptop. But, given the high capacity of these devices, we would recommend to buy special equipment with low power consumption, designed for home video surveillance systems.
If the transfer of data to the remote device you want to use 3G-modem, the computer, in this case at all is a bad assistant.
Maksimus52 (Member FORUMHOUSE):
On a PC with access to the network through a mobile operator (with 3G modems) disconnection often occurs without the user's participation is restored.
Special DVR should buy in such a way that the number of its channels in line with the number of cameras in your system.
If you decide to install a combined CCTV system, DVR that supports P2P technology - this is exactly what you need. It will allow to simultaneously record and monitor the object through the Internet. In this case, remote monitoring will be carried out without connecting the static IP-address and without having to make complex settings home router. For these purposes, use software provided by the device manufacturer, and a special service. Some call P2P cloud service, but it is not quite right, that is. To. The system allows you to not store, but rather view information from cameras through a variety of devices.
Denispnt (Member FORUMHOUSE):
The method - the "cloud" of P2P. For the clouds do not need a "white» IP. For him, using a simple, dynamic, which we use in modems, cellular operators. DVR communicates with the appropriate website and the user, knowing the unique device ID-number is connected through this site to it. It is clear that in this case, the registrar MUST support this service. The "cloud" nothing has been saved! This service acts only as a free schemes for communication. All information is written only to the recorder! Here there you can see the record or download it to your computer or tablet.
To record, we can only choose a reliable hard drive. The more its capacity is, the longer it will record continuously. If you have more than 2 cameras, the disc is desirable to select a capacitance not less than 1 terabyte. Especially its connection to the DVR will depend on the last design.
If you are not going to be monitored locally, to configure the DVR you will still need to connect a monitor to the device.
router
Ideal conditions for remote video surveillance is the availability of fiber-optic Internet. But, unfortunately, in most cases to use such technological advances can only be in a city apartment. As a rule, the territory of the country towns there is no reliable high-speed internet. Therefore, a router (router) will have to choose to support 3G (4G) modem, and the presence of LAN-ports.
However, with such a method of connection, there are some nuances.
DgafTLT (Member FORUMHOUSE):
You've got to be sure that the mobile operator's network can stably transmit the video stream from the camera. In this case, the router should be "friends" with the modem operator
In fact, it is. In most cases, mobile operator steadily transmits the data from the cameras, but no guarantee on the quality of the signal by a constant nobody will give you. Here, as the saying goes, you only need to try (you can pre-consult with the neighbors, who already have a working video surveillance system).
To be safe, you can measure the speed of outgoing traffic, which will ensure your modem. To do this his SIM-card is necessary to enter the site inspection speed of the Internet. If the figures exceed the 0.35 Mb / s, you can safely proceed to experiments with four cameras operating in the normal mode (not slow). The larger number of cameras, the high speed modem must provide.
installation of the system
Installation of a video surveillance system should be made as follows:
connection sequence similar to the following: camera connected to the switch (switches), then the signal from the switch is transferred to the recorder, the router and the monitor. In this embodiments are possible. For example, the signal is supplied to a monitor through video recorder.
Through the 3G-router signal is transmitted to the global network, from where it can be viewed through the P2P technology. If any of the items shown in the example of a chain you do not need (such as a monitor for local observation), they can be removed from the general scheme.
opl777 (Member FORUMHOUSE):
DVR is an IP. 8 channels operate in 1080P mode, browsing through a cloud service with "android." To TV system is connected via HDMI. DVR is on the shelf under the TV, it comes to a network cable from the hub installed in the utility room. By the hub connected IP cameras.
Finally a couple of nuances: the cables connecting the camera with other equipment, it is necessary to hide from prying eyes. For example, if the chambers are arranged around the perimeter, the cable is laid underground in metal pipes. If you want to hide not only wires, but the cameras themselves, know that hidden recording may lead to a conflict with the law.
atw (Member FORUMHOUSE):
On his site, you have the right to do anything you want, provided that it does not invade the privacy of others, such as neighbors. In accordance with the Constitution, the collection and dissemination of information about the private lives of citizens, who have not given consent, is prohibited. If you are simply monitored for its own territory, in order to shoot the attacker, you should hang a sign informing that the area is under surveillance.
If you are interested in creating a home video surveillance system, be sure to visit some sections located on our forum. In the subject "IP-surveillance, IP-video cameras"You can find answers to questions relating to the selection of suitable equipment. Useful information you can find in the topics "Video surveillance system with their own hands"And"Inexpensive video surveillance via Internet».
Discuss the article and read other materials devoted to country life you can on the websiteFORUMHOUSE.
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