This article will discuss what comprises a basic IP video surveillance system and the basic component choices that determine the video output. This will be the first of a series of articles discussing video surveillance equipment.
For this article, I have decided to obtain product from a single equipment manufacturer, Merit LILIN Corp. This company manufactures a range of video surveillance components including megapixel video cameras, switches, network video recorders and recording software. Working with a single manufacturer ensures the components are compatible with each other and technical support provides assistance with one telephone call.
For our purposes, a basic IP video surveillance system is comprised of an NVR (Network Video Recorder), a PoE switch, IP cameras and Ethernet cabling (preferably CAT 6 cable). To setup and customize the system and view the video output, a monitor is necessary.
For our basic system, LILIN recommended using the 1080P Real-time Multi-touch 4-Channel Standalone NVR Touch, part number NVR104. This video recorder supports up to full 1920x1080 HD resolution. Additional resolutions supported include 720P, D1 and VGA. The NVR104 has the capacity for up to four channels of real-time recording with up to 24Mbps (Megabits per second) throughput. The recording time is configurable using schedule, manual, motion detection and external alarm. The software that operates each LILIN NVR supports a touch screen display, eliminating the need for a mouse or other input device.
For the purpose of this article, I was provided with two two-megapixel IP cameras whose resolution is 1080P, the High Definition (HD) standard. The LILIN LD6122EX3.6 is a Day & Night 1080P Vandal-Resistant Dome IP Camera and is equipped with a 1/2.5” CMOS image sensor. This Vari-focal lens focal length is adjustable from 3.3-12mm, which is the distance between the lens and the image sensor. A Vari-focal lens has added flexibility able to adjust the width and depth of the captured scene.
This camera’s minimum color illumination is 0.25 Lux at an F-stop of F1.4. For our purposes, a 0.25 Lux is barely equal to the amount of light put out by a full moon on a clouded night. This is the amount of illumination required for the camera to capture color images. The LD6122 camera’s maximum video resolution is 1920 x 1080 (1080P) at up to 15fps (frames per second). The camera housing is rated for outdoor and indoor applications.
The LD2222 1080P HD Dome IP Camera has a fixed lens focal length of 4mm from the 1/2.5” CMOS image sensor. The focal length indicates the angle of view or how much of the scene will be captured. The smaller the number, the wider the image will be. The larger the number, the narrower the angle of view will be. This camera has a very wide angle of view.
The LD2222 camera lens aperture opening is an F1.6. This camera requires a minimum of one Lux to record up to 15fps at 1080P. For our purposes, a one Lux is equal to the amount of light put out by a full moon on a clear night. The camera housing is rated for indoor applications.
The Eight-Port PoE+ Fast Ethernet Switch (30W/port), part number PMH-POE08260WAT, provides Power over Ethernet (PoE) at 30 watts for each of the eight Gigabit uplink ports. This switch provides power to each camera. There are two combo Gigabit UTP port/SFP to transfer the video from the cameras into the NVR. The Gigabit (1000-Megabits per second) speed capability is required to transfer large files.
CAT 5e cables connect the cameras to the switch and the switch to the NVR. The CAT 5e cable is the standardized cable for Gigabit Ethernet performance. The maximum allowed length for CAT 5e cable is approximately 300 feet.
For the purpose of this first article, we decided upon a tabletop installation. To setup the video surveillance system, the individual components must first be wired.
Important: No component should be powered until all of the components are connected.
Interior dome cameras are the backbone of most surveillance systems.
Learn to enjoy the view as you select and install CCTV systems.
Evaluate CCTV manufacturers carefully, making sure they have a sound reputation and stand behind their products
Shipped in a single box with the camera and lens already mounted in the enclosure, “plug-and-play” packages from a single manufacturer simplify installation as well as the ordering process...