Security Systems for Your Business

.- CCTV Closed Circuit Television starts with the television itself. In fact, the first CCTV systems that were created before the same television for the public we all know, which was much more growth.

The CCTV had a very specialized use during the past century, mostly because of the price of the cameras, which tremendously limited applications. With the advent of new image acquisition systems in cameras, Aundair to high growth of crime and insecurity, causing an increase in production and a decrease in precios.En CCTV systems currently are available to any organization, company or family, and their practical applications are endless. By lowering the price significantly time-lapse videograbdoras will integrate CCTV systems (nearly Part 5 in 3 years) and moved to the monitor as an essential part of a system. The new DVRs compete on price with the analog, and we can say that there is equipment for all levels and requirements of society.

* Digital video recorders store a lot of information to be analyzed later. They complement that gives the highest value added to the system.

WHAT IS CLOSED CIRCUIT TELEVISION? System is all that is abierto.La television commercial television as we know, is open to the public as through the air and even through cable (cable TV) is circulated to all who wants to watch the programming. In the case of closed circuit video generated is kept private and are only able to observe the people assigned to it within a organización.Mientras in an open system, the main purpose is fun and / or information in a closed system the primary purpose is surveillance.

APPLICATIONS FOR CCTV: Probably the best known use of CCTV is in security and surveillance systems and in applications such as shops, banks, government offices, public buildings, airports, etc.. In fact, the applications are almost limitless. Here are listed some examples:

- Medical probes with micro cameras introduced in the human body .- Monitoring traffic on a bridge .- Monitoring industrial processes such as foundries, bakeries, - manual or automatic assembly .- Monitoring in absolute darkness using infrared light .- Monitoring public transport vehicles .- Monitoring in key areas, businesses, shops, hotels, casinos, airports .- Monitoring the behavior of employees .- Monitoring of children in the home, school, parks, nurseries .- Monitoring parking, including car plates .- Monitoring of checkpoints, vehicles or people. - Facial analysis for identification of criminals in public areas.

Logically, in almost all cases must be accompanied CCTV recording of the events that are monitored in order to obtain evidence from all the major moviemiento, and also the minimize human surveillance monitors.

AUDIO AND VIDEO: audio is called to all sounds, voices, noises, music and more., Which are collected from the environment (for microphones) and sent by a means of telecommunication (cable, radio frequency, fiber optics). From same thing happens with the images, which when converted to a format electetricos Inpulse is called video.El Audio and Video, on the other side of the closed circuit, are reproduced as sound and image through speakers and monitors respectively.

Elements of a CCTV SYSTEM

THE C? MARA.

The video generation point of any CCTV system is the camera. There are cameras that include a microphone interconstruido. There are many types of camera, each for different applications and with different specifications and features, which are:

- Black and White, Color, or Dual (for day and night applications) .- Operating temperature. - .- Weather resistance lighting (sensitivity) .- Environmental conditions (minimum and maximum temperature, humidity, salinity) .- resolution (image quality) .- System format (NTSC American, European PAL) Supply Voltage .- .- .- Dimensions lens type and size used .- Quality CCD .- The CCD chip is initially captured the image size and quality is very important. - The most commonly used in CCTV is the 1 / 3 ", but there are ¼" (minor) and ½ "(major).

LENS: For professional CCTV cameras without a lens and only come with a threaded connector for the lens assembly ienstalador that best meets the requirements, which vary according to:

Minimum Distance from objeto.Angulo fijo.Intensidad observación.Varifocal or light, variable or fixed or variable fijo.Telefoto.

Not all lenses have focus and iris adjustment. Most iris adjustment should be, some very wide angle lenses have no focus ring.

MONITOR: The image created by the camera needs to be reproduced in the control position. A CCTV monitor is virtually the same as a television receiver, except that it has no tuning circuit. But the main feature is the durability of your screen. We must remember that the CCTV is required 24 hours of work without loss of image quality for many years in difficult or hostile environments.

Figure 2 .- Monitor CCTV.

SIMPLE SYSTEM CCTV: The simplest system is a camera connected to a monitor via a coaxial cable to the electricity supply for the camera through the monitor. This is known as a camera powered by the cable. Diagram 3 shows how a system is formed. The best known version of this type is the self-observation system marketed by major supermarkets at an affordable price, easy to install.

3 .- Diagram of a basic connection of CCTV.

The first included a single camera systems, systems appeared after 2, 3 and 4 cameras which were sequenced automatically by the monitor, just a "sequencer" interconstruido. These systems include a quad lately, which allows observing the images of the 4 cameras simultaneously.

Figure 4 .- A system of 4 cameras powered by the CCTV system.

CCTV Professional Systems: The basic installation of CCTV Diagram 5 shows how the camera and monitor are powered through an electric cable. A coaxial cable carries the video signal from the camera to the monitor. However, we note that the installation must comply with all applicable regulations in connection matería.Estas allow great flexibility in the design of complete systems. When more than one camera, you must include a switch and video as shown in Figure 6. Any camera can be selected to be fixed on the screen or be assigned in sequential selection in turn through all the cameras. Usually the time for each camera to be displayed on the screen can be adjusted via a control.

Figure 5 .- A basic system powered by the mains.

Figure 6 .- A system of 4 cameras with video switcher.

VIDEO RECORDING SYSTEMS: The next development of a basic system is the sum of a VCR, the connections can be as shown in Diagram 7.

Figure 7 .- A multichamber system with video recorder.

With these arrangements, the figures for the review of the recording will be according to the manner in which the switch was assigned during recording. That is, if it was assigned to the sequence, then the same that was seen be displayed on the monitor screen. No control over what was displayed.

Time Lapse Recorders (VCR's) PROFESSIONAL: The recording of the video became a very common capabilities for the domestic market since the early 80s. VCRs in CCTV apparently has the same design as a domestic, with the difference that they have additional features designed specifically for the security market. We also work with HSV ordinary cassettes. The use of industrial cabinets designed to withstand continuous use of the VCR sets them apart from the others (made to work for 3 or 4 hours daily). The principle of the functionality of a VCR for security is to be recorded at least 24 hours . Recording will take place in a 'regular' (over time) instead of 'continuous' (home recorders) The security VCR to select the time slots in which you want to record, depending on your requirements. This form of record at intervals of time is known as "time-lapse." You can get a time-lapse recording from 24hrs to 960hrs, all depend on the needs of the application.

DIGITAL RECORDER - DVR:

Technological advances in computer systems and networks have reached the Security industry and recording methods have been implemented digital technologies to achieve best evidence. Digital video recorders (DVRs) now convert analog video CCTV systems in digital systems. By achieving convert from analog to digital video evidence, we get a number of benefits such as being able to store the video in devices such as diskettes, CDs, hard drives, etc.., Besides being able to convey this information through the telephone line data networks or the Internet. Digital video recorders also offer great flexibility to perform quick searches, or just print images back valuable information. Today you can choose from a VCR or a DVR, according to their needs. SYSCOM manages an extensive line of both.

PC's MADE IN VCR: There are in the market with video capture boards which can be made DVRs from ordinary computers. For no reason we recommend this technique because it is extremely unstable and does not represent reliability for the user. Although it is an economical solution, it begins to cause problems in a few days.

C? GANGS WITH MOVEMENT: At this point the cameras mentioned have been fixed with fixed focal length lenses. In many applications the area to be covered would need many fixed cameras. The solution for this is the application of cameras mounted on a mobile platform. This platform can be controlled from a remote location. The platform may simply rotate in a horizontal plane and is generally known as a scanner. Alternatively, the platform can be controlled both in the horizontal or vertical and is commonly known as Pan Tilt unit. A basic system shown in Figure 8.

The emergence of mobile internal camera domes in recent years meet the requirements of virtually any type of application. With the facility to rotate through 360 ° in less than a second, and have vertical movements of up to 94 ° and zoom up to 220X or more, such domes are becoming a must for any type of application. The drivers for this type of domes have the versatility to create user presets and control tens of domes from the same point. Figure 8 shows a system of domes CCTV system.

Figure 8 .- Basic System Moveable cameras.

The cameras can be installed indoors and / or outdoors. When used outdoors they always require a cover for protection. For indoor environmental or aesthetic content will dictate when you need a cover. Systems can contain a combination of both types of cameras and mobiles.

Figure 9 .- multi-camera system.

OTHER CONSIDERATIONS: This is an introduction to CCTV. The latest developments include the concept recording of many cameras, near real-time images over telephone lines, real-time true color images over ISDN telephone lines, the switching of hundreds or thousands of cameras from different positions separated control to dozens of monitors, reliable detection of movement through an electronic evaluation of the video signal; immediate full-color printing in seconds from a camera or recorder, the replacement of manual controls by simply touching the screen.