The rapid development of China's economy has made people's living conditions better and better, and the dual pressures of work and life have made many people have less time to understand the family status, and more and more negligence for parents and children; but The development of technology has effectively helped people solve this problem. You can take care of and visit your parents and children remotely through a smooth network, keep abreast of the security situation in your home, and make real-time monitoring of your home security situation a very popular technology nowadays. . Driven by this tide, the application of home surveillance network cameras is particularly urgent. In fact, home network video surveillance is an inevitable product of social development. It is an individual's security requirement for the social unit cell family. Many people are at a loss when faced with the assortment of surveillance products on the market. They are afraid that what they buy is not good value for money. In fact, buying surveillance products and selecting systems is the same as buying a mobile phone. Different family needs are different. However, unlike the mobile phone, the mobile phone is a single product, and the monitoring system includes cameras, video transmission, storage, display and other functions in one, and it is not a single product. Moreover, according to local conditions, different types of houses will have very different camera installation positions. Therefore, before we determine the product matching, we should determine our own prevention requirements, understand the relevant product knowledge, and determine the product matching plan according to the actual situation. When possible, it is best to draw a simple product package and installation plan, listing the installation location, installation method, and accessories of each product to avoid the lack of east and west during installation and affecting the installation. The first step: decide whether to use PC + capture card or DVR as your host For users who have computers at home, especially desktop computers, the "PC + capture card" method can be said to reduce costs. Of course, the price is not the first. Let's take a look at the pros and cons of each side. The advantages of using PC + capture card: you can make full use of your original home computer (configuration meets the requirements of the board), each monitoring card has different requirements for the PC system, it is best to use INTELP4 CPU and chipset, and this PC Can be used for general purpose. The disadvantage is that the hard disk space required for video files is large. If you need to apply for a long time, you need to use a professional digital hard disk recorder. DVR Digital hard disk recorder: Compared with traditional analog recorders, hard disk recorders have greater advantages. They are: long recording time, and the maximum recording time depends on the capacity of the connected storage device, which can generally reach several hundred hours; supported The number of video and audio channels is large, and several, dozens, or even dozens of simultaneous recordings can be performed at the same time; the quality of the recorded image will not deteriorate with time; the function is more abundant, unlike the traditional analog video recorder. Different application fields have different functional requirements for DVRs. For example, the hard disk recorder used in the monitoring industry should have the following functions: compression function, recording function, playback function, backup function, network function, PTZ, lens control function, alarm input and output. DVRs designed and produced by different manufacturers may not necessarily have all the functions listed above. Step 2: Decide how many cameras are needed and determine the camera image quality The apartment types are different, the fields that need to be monitored are different, and the cameras we need are also different, so we must first determine the monitoring points. Then, according to the specific conditions of each monitoring point, determine the picture quality requirements of each monitoring camera, and determine the number of home monitoring system cameras. Video camera Step 3: Whether to have night vision function There are many types of cameras used in surveillance, which are dazzling. We also need to determine the type of surveillance camera used according to the brightness (illuminance) of the monitoring place and whether night monitoring is required. If the ambient brightness of a monitoring point is relatively low or needs to be monitored at night, we need to determine the camera of this monitoring point as an infrared camera; if the camera lens position needs to be adjusted in some places, we may need to rotate the pan / tilt; for both You can purchase ordinary cameras that do not require night vision or zoom lenses. Step 4: Whether to wire or use wireless For home monitoring, aesthetics is also a very important consideration. In addition to the expensive price, the wireless network does not save the trouble and unsightly of the camera cable, but it needs to pay attention to the problem of distance and obstacles. In principle, cement building materials will shorten the wireless transmission distance, and metal materials will completely shield the wireless signal. The transmitter (on the camera side) and the receiver (on the host side) should be far away from other electrical appliances to avoid interference. If you want to use a wireless network, We have to weigh carefully. It should be noted that we must accurately measure the distance between each camera and the host, which is an indispensable step for wired or wireless monitoring. Step 5: Camera features and prices The function is realized, but the price, can you get your own recognition, generally speaking, cameras with special functions, such as infrared functions, such as zoom function, will increase the price of the camera. If you feel that the price of the entire monitoring system has increased, you should understand your needs, such as the desired picture quality, the light at night, the distance to be shot, and select the appropriate camera based on these factors. The civil air defense alarm control system is a wireless dual control system developed specifically for civil air defense alarms. This system utilizes wired or civil air defense wireless dedicated frequency points, equipped with alarm controllers (control units, radio stations, wireless modems, wired interfaces), computers, etc., to automatically release and manage various alarms in the civil air defense alarm system The system equipment is easy to operate, with functions such as state echo and network management, as well as anti-interference and encryption (anti hostile sabotage) functions. Communication is reliable and efficient. Control device, control unit, Alert system, Safety warning system, Warning device Taixing Minsheng Electronic Co.,Ltd. , https://www.ms-speakers.com