天津市监控公司

随着数字网络监控的发展，目前很多超市、商店、餐馆、网吧等都开始安装数字网络监控系统了，像这些地方工程安装点位较少，一般情况几个点到十几个点就够了。那么，安装一套小型数字网络监控系统大体需要什么设备呢？

With the development of digital network monitoring, many supermarkets, shops, restaurants, Internet cafes, etc. are beginning to install digital network monitoring system, such as these places are less than the installation point, a few points to more than ten points in general. What devices do you need to install a small digital network monitoring system?

一、网络摄像机+摄像机支架

1. Network camera + camera support

网络摄像机又称IPC，IP Camera，是视频图像采集的主要设备，网络摄像机对比模拟摄像机的最大优势就是高清晰度，网络摄像机的分辨率较高，可以达到高清效果，网络摄像机的分辨率有130万像素，200万像素，300万像素等。现在人脸识别摄像机很红火，有时候可以推荐给客户，利润高点。

Network camera also called IPC, IP Camera, is the main device of video image acquisition. The greatest advantage of the network camera contrast analog camera is high definition. The resolution of the network camera is high, and the high definition effect can be achieved. The resolution of the network camera is 1 million 300 thousand pixels, 2 million pixels, 3 million pixels and so on. Now face recognition cameras are very popular. Sometimes they can be recommended to customers with high profits.

二、网络高清硬盘录像机

Two. High definition hard disk video recorder

网络高清硬盘录像机的主要目的是实现对前端网络摄像机的集中管理，设备搜索，图像预览，集中录像，录像回放等功能，采用嵌入式Linux系统。因此为了保证录像存储时间，网络高清硬盘录像机一般支持多盘位。

The main purpose of the network high-definition hard disk video recorder is to realize the centralized management of the front end network camera, the equipment search, the image preview, the centralized video, the video playback and so on. The embedded Linux system is used. Therefore, in order to ensure the storage time of video, HD HD video recorder generally supports multiple disk bits.

三、监控硬盘

Three, monitor hard disk

监控硬盘的主要目的是用来存储视频录像的，安装在网络高清硬盘录像机内。由于网络摄像机分辨率较高，占用码流较大，单位时间内的存储容量也要远远大于模拟监控，因此对硬盘容量要求较高。同时由于视频要24小时不间断录像，因此对硬盘的质量要求也很高，所以建议在数字网络监控中要选择大容量的监控级硬盘。现在的硬盘规格一般为4T、6T、10T等。

The main purpose of monitoring hard disk is to store video and video and install it in the network HD HD video recorder. Because of the high resolution of the network camera, it occupies a larger bit stream, and the storage capacity in the unit time is far greater than the analog monitoring, so the capacity of the hard disk is higher. At the same time, due to the video to 24 hours uninterrupted video, so the quality of the hard disk is also very high, so it is suggested to select a large capacity monitor level hard disk in the digital network monitoring. The current hard disk specifications are generally 4T, 6T, 10T and so on.

四、显示器

Four. Display

显示器主要用来显示网络高清硬盘录像机上的视频图像，通过VGA或HDMI接口与网络高清硬盘录像机相连。

The display is mainly used to display video and image on HD HD video recorder, and connect to HD HD video recorder through VGA or HDMI interface.

五、电脑

Five. Computer

在不使用网络高清硬盘录像机的情况下，也可采用电脑+网络摄像机厂家的数字网络监控软件来实现网络摄像机的集中管理，像海康高清监控系统（JNVR），可实现设备搜索，图像预览，集中预览，录像回放，集中管理等功能。

Without the use of the network HD video recorder, the computer + network camera manufacturer's digital network monitoring software can also be used to realize the centralized management of the network camera, such as JNVR, which can realize the functions of equipment search, image preview, centralized preview, video playback, centralized management and so on.

六、电源线+ 监控电源

Six, power line + monitoring power supply

电源线主要用来传输220V交流电的，到网络摄像机端再接DC 12V或者AC24V监控电源，为摄像机供电。

The power cord is mainly used to transmit 220V alternating current, and then connect DC 12V or AC24V monitoring power to the network camera terminal, and supply power for the camera.

七、超五类或者六类非屏蔽双绞线

Seven, super five or six types of unshielded twisted pair

在数字网络监控系统中，使用超五类或者六类非屏蔽双绞线进行视频信号的传输，双绞线最远传输距离建议不超过100米，同时为了保证视频信号的传输效果，建议选择国标纯铜线缆。

In the digital network monitoring system, using ultra five or six kinds of unshielded twisted pair wire for video signal transmission, the farthest transmission distance of the twisted pair is not more than 100 meters. In order to ensure the transmission effect of the video signal, the national standard copper wire cable is recommended.

八、交换机

Eight. Switch

交换机的主要目的是实现电信号转发的网络设备，前端摄像机及网络高清硬盘录像机均连接在一台交换机上。对于10个点以内的小型监控工程，采用一台8口或16口的普通百兆交换机即可，如果超过10个点，建议选择带千兆口的交换机。一般采用POE交换机供电。

The main purpose of switches is to achieve electrical signals forwarding network devices, and the front end cameras and HD HD video recorders are connected to one switch. For small monitoring projects within 10 points, an ordinary 100 megabyte switch with 8 or 16 ports can be used, and if more than 10 points are over 10, it is suggested to choose a Gigabit switch. Generally, POE switch is used to supply power.

九、水晶头

Nine. Crystal head

水晶头是网络连接中十分重要的接口设备，双绞线两头通过水晶头与前端网络摄像机和后端交换机连接在一起，水晶头的做法分568A和568B两种标准，目前多采用568B标准。

Crystal head is a very important interface device in network connection. The twisted pair is connected by the head of the network with the front end network camera and the back end switch. The crystal head is divided into two standards, 568A and 568B, and the 568B standard is used at present.

十、注意事项

Ten. Precautions

与传统的模拟监控相比，数字网络监控用双绞线取代了同轴电缆实现视频信号的传输，同时增加了交换机的选择。一套数字网络监控系统的效果好坏，很大程度上取决于交换机的选择，因此建议在数字网络监控系统实施过程中，尽量选择质量好的知名品牌交换机。

Compared with the traditional analog monitoring, twisted pair cable is used instead of coaxial cable to realize video signal transmission, and at the same time, the selection of switches is increased. The effect of a set of digital network monitoring system depends largely on the selection of the switch. Therefore, it is suggested that in the implementation of the digital network monitoring system, we should try to choose a well - known brand of famous brand switch.