Protect your home security and DIY your home security system

Now, with the gradual improvement of living standards and the strengthening of people's awareness of family security, a reliable home security system has become a necessity in people's lives. Perhaps someone will recommend you a smart home security system. Admittedly, it sounds like such a security system is indeed worry-free and beautiful, but its price is also high. Not every family can afford the price of tens of thousands of yuan, but safety is what everyone wants. What can we do? Don't worry, let us DIY a reasonable but relatively cheap home security system to meet your needs for family security.

The door is the first line of defense for home security.

1. Access Control System

As the saying goes, "One man guards the pass and ten thousand men cannot open it." Obviously, access control has become the most important security tool. Nowadays, residential areas generally install intercom systems in the corridors, which should be regarded as the first line of defense for home security. Of course, the security management of many old residential areas is not perfect. For such families, people are more inclined to choose anti-theft doors as the "iron general" to protect family safety.

2. Monitoring system

For home security, monitoring systems have now become popular, especially with the popularization of computers, home monitoring seems to have become a necessity. However, buying a monitoring system is like buying a mobile phone . Each family needs to choose a different monitoring system according to their own needs. 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. If conditions permit, it is best to draw a simple product matching and installation plan, listing the installation location, installation method, accessories used, etc. of each product, so as to avoid the situation where something is missing during installation and affects the installation.

How to build a home monitoring system depends on user needs

Step 1: Decide whether to use PC+capture card or DVR as your host;

Advantages of using PC + acquisition card: You can make full use of the factory's original home computers (configuration meets the board requirements). Each monitoring card has different requirements for the PC system. It is best to use INTEL P4 CPU and chipset. At the same time, this PC can also be used for general purposes.

The disadvantage is that the video file requires a lot of hard disk space. If you need to use it for a long time, you need to use a professional digital hard disk recorder.

Digital hard disk recorder: Compared with traditional analog recorders, hard disk recorders have great advantages, which are: long recording time, the maximum recording time depends on the capacity of the connected storage device, generally up to several hundred hours; support a large number of audio and video channels, can simultaneously record several channels, dozens of channels, or even dozens of channels; the quality of recorded images will not deteriorate over time; more functions, unlike traditional analog recorders. Different application fields have different functional requirements for hard disk recorders. For example, hard disk recorders used in the monitoring industry should have the following functions: compression function, recording function, playback function, backup function, network function, pan/tilt, lens control function, alarm input and output. Hard disk recorders designed and produced by different manufacturers do not necessarily have all the functions listed above.

Step 2: Decide how many cameras you need and determine the camera image quality

According to the specific conditions of each monitoring point, determine the image quality requirements of each monitoring camera and decide the number of cameras in the home monitoring system.

Step 3: Do you need night vision?

There are many types of surveillance cameras, which may seem dazzling. Determine the illumination (brightness) of the surveillance site and whether night surveillance is required. If the ambient brightness of a certain surveillance point is relatively low or it needs to be monitored at night, you need to determine that the camera at this surveillance point is an infrared camera. If you do not need night vision function, please purchase a normal camera. If you need special functions (such as pan/tilt, zoom lens , etc.), please purchase other cameras that you approve of.

Step 4: Wiring or wireless

In addition to the high price, wireless networks do save the trouble and unsightly appearance of pulling cables for cameras, but you need to pay attention to the distance and obstacles. In principle, cement building materials will shorten the transmission distance of wireless, and metal materials will completely block wireless signals. The transmitter (on the camera end) and the receiver (on the host end) should be far away from other electrical appliances to avoid interference. If you want to use a wireless network but are not sure, you can also contact the contractor.

Please note that you must accurately measure the distance between each camera and the host.

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Step 5: Camera Features and Prices

If you are still confused and cannot decide, then you need to figure out your needs, such as the desired image quality, night light, and the distance you want to shoot, and then you can choose the appropriate camera based on these factors.

Here are two common home monitoring solutions:

1. Network Camera

You only need to buy a network camera (usually you also need a router ), connect the network camera to the router through a network cable , and you can realize LAN monitoring. In most cases, you can realize remote monitoring by doing port mapping on the router . At present, some manufacturers have realized routing penetration technology, which does not require users to set up routers , and truly realizes plug-and-play, which is a good thing for users who are not familiar with computers.

Network cameras Remote monitoring can be achieved through the Internet without the need for a computer at the front end of the monitoring. Not only can it be viewed through the client software, but it can also be browsed directly through IE. In addition, most network cameras also support motion detection, recording, historical playback, snapshot and other functions.

Since the monitoring front end only needs an embedded device, the cost is reduced, the complexity of installation is reduced, and maintenance is also simple. In terms of installation, many sites now already have networks that can be used directly. If video cables are used, rewiring is often required, which is costly.

2. Camera + video capture card + computer + monitoring software

Now all kinds of acquisition cards basically have their own monitoring software, which can generally realize remote monitoring function. Users need to buy cameras, video acquisition cards (usually free software), insert the acquisition card on their own computers, connect the camera to the acquisition card, and run the monitoring software to realize LAN and remote monitoring.

3. Anti-theft alarm system

In the home security system, the proportion of the anti-theft system cannot be underestimated. The home anti-theft alarm system usually consists of three parts: detector (also known as alarm), carbon monoxide gas alarm, transmission channel and alarm controller. The alarm detector is composed of sensors and signal processing. It is a device composed of electronic and mechanical components used to detect intruder intrusion or smoke. It is the key to the anti-theft alarm system, and the sensor is the core component of the alarm detector. Using sensors with different principles , different types, different uses, and different detection purposes can be formed. Alarm detection devices.

Usually, the home burglar alarm system uses a host computer to connect various detectors wirelessly or wired to realize the burglar alarm function. The host computer is connected to a fixed telephone line. If there is an alarm, the alarm is dialed according to the mobile phone or phone number set by the customer .

The burglar alarm system is an important facility to prevent theft, robbery, fire and other accidents. Once an emergency occurs, the owner can be notified quickly by phone, so that emergency measures can be taken quickly to prevent accidents or disasters from expanding.

With the advancement of technology, home security systems have also developed rapidly. The practicality and price of the previously unattainable technological security products are no longer a problem. After April 2008, the false alarms and missed alarms that previously troubled home security products have been greatly improved, and the price of security products has also dropped from tens of thousands of yuan at the beginning of the 21st century to several thousand yuan or even less than a thousand yuan that ordinary families can accept. Home security systems have gradually stepped down from the altar of mystery and high prices and have been accepted by ordinary families. We are looking forward to choosing home security systems like buying ordinary household appliances.