Family selection of surveillance cameras should pay attention to what
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Home security is a preventive measure based on home security. It uses physical or electronic technology to automatically detect intrusions that occur in the deployment monitoring area, generate an alarm signal, and prompts the on-duty personnel to place an alarm in the area where the countermeasure may be taken. system. Mainly uses the host computer, through the wireless or wired connection various types of detectors, realizes the anti-theft alarm function. As people attach importance to home security, home security applications are becoming more and more widespread. But what should you watch out for when choosing a home surveillance camera?
First, we must first understand your monitoring needs <br> <br> how many cameras you need depends on what they need to do, ready to install in those places? You must also think about whether you need video, and you need to buy a video recorder. In addition, what features do you want to include in the surveillance system? Do you want wired or wireless cameras?
Wireless network cameras need to work with wireless routers, and wireless routers are required to be able to access the Internet. The advantage of using WIFI or 3G wireless network camera: no wiring, installation and increase the number of cameras are more convenient, the cost of the Internet is relatively low. Such home network cameras are the market trend and the mainstream.
The wired network camera can work normally by plugging it directly into a network port or router that can access the Internet. The advantages of using a wired network camera are: The technology is mature, and the industrial network camera technology is transplanted directly. It is not afraid of signal interference, stable and reliable, and the cost of the Internet connection is relatively low. The disadvantage is that the installation is complex and wiring is needed. It can only be accessed through a computer. The scope of use is limited and it is no longer suitable for modern home use.
According to the demand, what should we pay attention to when choosing a home surveillance camera?
A: The definition of the screen When viewing the screen of the surveillance camera, the main effect is static clarity, dynamic resolution, and color reproduction. There is also when shooting landscapes, scenery, flowers, moving objects, to see if the picture is clean, the color is natural and realistic. The sharpness of the picture is not only to see the horizontal resolution, but also depends on its wide dynamics, automatic white balance, image sharpness adjustment, super digital noise reduction, intelligent digital automatic photometric compensation and other functions. When detecting the wide dynamic function, it is necessary to observe whether the transition between the bright area and the dark area is clear and natural, and whether the wide dynamic range can be automatically adjusted. Good cameras have rich levels and delicate performance in bright and dark areas. When looking at license plates under nighttime headlights, the outline of the headlights, filaments, and license plates are all very clear, and no bright lines appear. Low illumination requires observing whether the camera's surveillance picture is clear at night or not. The noise level affects the performance of the HD camera. Only a good performance can shoot the desired effect at a crucial moment. A high-definition surveillance camera is enough to see the human face in home monitoring. II. Wiring and power supply problems Wiring has always been troubled by the installation of home surveillance cameras. A big problem. The family is different from factories, shops and other facilities. It should pay attention to the appearance of the installation as a whole. Although the signal of the wired surveillance camera is stable, the wiring is not only troublesome, but also destroys the overall appearance of the home decoration. At the same time, exposed wires may also be the target of criminal damage. Generally, when installing surveillance cameras in homes, I recommend using surveillance cameras that transmit over wireless networks. At the same time as the installation, try to stay away from objects with electromagnetic signals, such as large home appliances, with less signal interference.
For power supply, try to select POE power supply. POE is a fast-growing and widely used network power supply technology in recent years. POE refers to the existing Ethernet Cat.5, the wiring infrastructure is unchanged, in addition to some IP-based terminals (such as IP phones, network cameras, etc.) to transmit data signals, but also for this Devices provide direct current technology. In this way, the network camera no longer needs to be powered by other power sources. The centralized use of UPS (Uninterrupted Power Supply) ensures that the equipment will continue to operate for a certain period of time (depending on the UPS), and also simplifies management. The IEEE802.3af standard is a new standard for POE based on Power over Ethernet (POE). The standard requires that the power consumption of devices powered by POE cannot exceed 12.95W.
III: Power Supply Problems The power supply is the source of energy that surveillance cameras provide for monitoring. After purchasing a surveillance camera, if you plan to use multiple monitoring cameras to monitor or integrate security devices such as burglar alarms, do not put the entire security system on a single power supply. Because the entire system is placed on a power supply, it is often necessary to turn the power on and off while the monitoring system is being serviced. All cameras are started at the same time when the power is turned on, and the starting current is particularly large. The impact on the power supply is great, and the power will be severely burned. When the power supply fails, the entire closed-circuit monitoring system is paralysed and may cause unnecessary trouble.
Today, home video cameras have won the favor of users, and families should pay attention to high-quality products when they purchase them. Now that thieves have high technology for theft, they want to guard against the theft of professional thief. The technical content of the camera is higher than the "professional level" of thieves. Otherwise, it is nothing more than mere irrelevance, as the thieves do not negotiate.