Analysis on the development path of home security wireless cameras

    With the improvement of people's living standards and the rapid development of network technology, security protection has become more and more popular. Especially in recent years, the development of information technology and the improvement of people's living environment have prompted people to have an unprecedented awareness of family security. Thanks to the rapid development of network technology, it has become possible to take care of children and pets remotely and monitor family situations in real time. People can learn about their family profile through remote visits while they are busy at work or traveling, and make timely analysis and judgments based on the situation. 

    With the popularization of the Internet, more and more home networks are connected to the Internet through ADSL or FTTX+LAN. High-performance wireless indoor APs or wireless routers are used indoors to provide wireless coverage, so that wireless network cameras installed indoors can be connected to the home wired network through wireless networks.

   1. System Functions

    1. Remote real-time monitoring function

    Users can use the monitoring client software to watch remote monitoring videos in real time through the Internet. The monitoring client software can be installed on computers and smart phones.

    2. Remote alarm and remote disarming function

    The wireless camera of the home wireless video surveillance system can monitor images within a range of 15 meters and send alarm information to the user's mobile phone and client software in the first time. Users can use computer or mobile client software to remotely and conveniently manage the defense and disarming of the monitored place.

    3. Network storage image function

    The home wireless video surveillance system can save surveillance videos through the network. In the absence of alarm or disarmed state, the surveillance location video can be saved on the network hard disk at set time intervals; in the event of an alarm, the image can be continuously saved on the network hard disk until the alarm is lifted. Users can watch the surveillance video playback at any time through the client software.

    4. It is equipped with night vision, PTZ and other control functions

    Choose a wireless camera with infrared night vision function, which can also record normally in a dark environment. If you use a 360-degree rotating pan/tilt head, you can also greatly expand the monitoring range, avoid blind spots, and make one camera achieve the effect of multiple cameras.

    5. Mobile phone interactive monitoring function

    Mobile phones are the most mobile monitoring tools. Smart phones can be installed with powerful monitoring client software, while ordinary non-smart phones can use the browser on the phone to conveniently view real-time and historical monitoring images. When an alarm occurs, the phone will receive a text message with a link to the monitoring image, and the user can directly open the text message.

    Monitoring images. Users who are not used to using mobile browsers can also send text messages to the service number, and the system will automatically reply with a text message with the current image link. Users can open the monitoring images in the text message and can also use mobile text messages to perform operations such as disarming and setting up defenses.

   2. System composition

    The system consists of wireless routers or wireless APs, wireless cameras, MODEMs, power supplies, network hard disk recorders, sound and light alarms, computer terminals, etc. If the system requires anti-theft detection functions, you can choose to use a network hard disk recorder (NVR) to perform motion image detection, anti-theft deployment, and automatic recording.

   3. Equipment selection

    1. Selection of wireless cameras

    There are two types of wireless cameras on the market, one is WIFI wireless camera and the other is 3G wireless camera. Both cameras have distinct features. WIFI wireless network camera is cheap, mature technology, no wiring is required during installation. It is convenient to install and add cameras, and the cost of Internet access is relatively low.

    When installing the camera, you need to follow the instructions to make some simple network configurations before you can use it normally. At the same time, the distance between the network camera and the wireless router is generally required to be within 30 to 100 meters. If it exceeds this range, you need to use a dedicated antenna or install a wireless router nearby. At the same time, in places where wireless routers are used more intensively, you also need to set up wireless lines.

    The work of the router is quite long. 3G network cameras are available in 1U-SUJMA, WCDMA and CDMA2000 models. You need to insert the corresponding mobile phone card into the camera. The advantages of using 3G network cameras are: simple to use, no configuration is required, no wiring is required, no need for users to set up heat meters or any network by themselves, built-in lithium battery, and can be used wherever there is a mobile phone network. However, the price is expensive and the cost of later use is high.

    Considering the maturity of WIFI wireless camera technology, low price and low later use cost, this article selects WIFI wireless camera as the system component. WIFI wireless camera has built-in CPU and WEB operating system. Through the web browser, you can use remote access to view the real-time image of the network camera, and allow administrators to manage and control the network camera at any time and any place. There are multiple applications that can realize image monitoring, image recording and snapshot functions including up to 32 cameras. When choosing WIFI wireless camera, you need to consider the following factors. The first is the size and weight of the device. Lightweight and compact equipment is easy to install and concealed, and is the best choice for security monitoring. When installing the device, you can use screws to fix it on the ceiling, partition wall or glue it to household appliances without using tools. Medium-sized cameras with bases or brackets are cheap, but they must be installed with electric hammers or electric drills, and fixed to the wall with expansion bolts. They are not easy to conceal and complicated to install, so they are not recommended. The second is the choice of night vision function. The night vision function requires infrared auxiliary light source. The price is slightly more expensive, but it is the best for anti-theft detection. The next is the choice of brand. It is best to choose products launched by network manufacturers for home security wireless cameras. Although the monitoring effect is not as good as that of professional image manufacturers, it is easy to use, simple to configure, and convenient to access via the Internet. Finally, the image clarity requirement. The resolution of high-definition network cameras is 640x480, which can basically meet the needs of daily monitoring. It is also low-priced and is the mainstream in the market. 720P or 1080P high-definition cameras have good monitoring effects and clear images, but the price is more than twice that of standard fire cameras, and they have higher requirements for routers and network bandwidth, so they have not yet been popularized.

    2. Selection of wireless router

    Wireless routers are essential wireless products for ordinary families. They are cheap and easy to use. However, since remote monitoring requires a large amount of data traffic and the transmission power of home wireless cameras is relatively low, it is best to use wireless routers with higher transmission power, CPU frequency above 434MHz, and memory above 64M.

    3. Selection of hard disk video recorder

    If the home wireless video surveillance system is also used for anti-theft alarm, it is best to add a network hard disk recorder (NVR) and connect it to the wireless router as the host of video motion detection, anti-theft deployment and recording. If the purpose of the system is only to care for the elderly and children or watch pets, there is no need to use a hard disk recorder.

    4. Layout of wireless cameras

    First of all, the wireless camera must cover any area to be monitored, and no blind spots are allowed. Of course, these must be checked before checking the parameters of the selected product. Secondly, the camera should be placed near the power supply. Although wireless cameras do not need to use network wiring, the modem must have a power supply, so it is a better choice to place it near or above the air conditioner. Otherwise, additional power cables need to be laid, which not only increases the amount of work, but also is not beautiful. Finally, the camera should be installed in a relatively hidden location, which is not easily damaged by human beings and struck by lightning.

    5. Installation and wiring

    Wireless hard disk recorders need an independent network terminal. It is a better choice to put it together with the router, or to place it in the living room and connect it to the TV audio and video to play back the video. Wireless cameras need to lay power lines. This is the difficulty of system installation. Generally, indoor power sockets are installed 0.3m above the ground, and cameras are installed at a height of more than 2.5m, so it is difficult to get power. In places where the indoor power supply is relatively high, there is only air conditioning power supply. Therefore, using air conditioning power supply is a better choice. At the same time, the camera can be placed above the air conditioner. It is also convenient for concealment. The parallel connection of the camera line and the air conditioning line solves the problem of aesthetics.

    6. Installation of client software

    There are two ways to use a computer or smart phone to access the camera and monitor the real-time status of the home: one is to use a WEB browser to access the IP address of the camera; the other is to use the client software of the equipment manufacturer. The first method is more complicated, because most families use ADSL to access the Internet or community broadband, which are dynamic D' addresses. It is necessary to use the DDNS function of the router to bind the domain name, and the network settings are complicated. The second method is relatively simple. Install the client software of the product and register the network camera on the manufacturer's website to achieve remote access. You only need to perform simple settings according to the product manual.

   7. Cost of Traditional Wireless Cameras

    The price of wireless camera is 700 yuan, hard disk recorder is 1500 yuan, wireless router is 300 yuan, monitoring software is free, sound and light alarm is 200 yuan

    8. Disadvantages of Traditional Wireless Cameras

    If the target is fixed directly on the wall, it will be too obvious and people will easily find it and try to avoid the camera or destroy it directly.

    In June 2013, after two months of research and development, the Art Wireless Camera was launched by Zhongge Digital. It is easy to install, does not require wiring, professional settings, computers, or hard disk recorders, has no distance restrictions around the world, and can be viewed remotely anytime, anywhere via mobile phones or computers. No matter whether you have network coverage or not, you can view it anywhere you can make a phone call. It is synchronized in real time and has a variety of styles. It can be integrated into various environments and is the crystallization of the latest technology.

    1. Easy installation. No wiring is required. You can start watching by just plugging in the power supply. The camera itself is a complete video system.

    2. You can use your mobile phone or computer to remotely watch the real-time images, and your mobile phone or computer can also synchronously watch the video data at any time.

    3. Directly connect to 220V power supply, remote viewing 24 hours a day, no need to worry about running out of power in a few hours.

    4. Can be equipped with a 32G memory card to independently store video data and can record for 6 days or even longer.

    5. The picture is clear, and clear pictures can be taken even in low light conditions.

    Even if there is no network coverage, as long as there is a mobile phone signal, you can install a 3G router to watch the wireless camera