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Posts tagged ZOOM LENS

What is cctv system

May18
2012 Leave a Comment Written by admin

cctv system is an important part of security technology to prevent the system is an advanced ability to guard against highly integrated system by remote cameras and auxiliary equipment (lenses, head, etc.) directly to watch the monitor places all the circumstances, the place to be monitored at a glance. Cctv system can also be linked with anti-theft alarm system and other security technology to prevent system operation, its ability to guard against more powerful.

cctv system can not be directly observed occasions, but it can real-time, the image of a true reflection of the screen being monitored object, and has become a very effective observation tool in modern management monitoring. Because it has only one person in the operation of the control center can be observed in many regions, even the unique features of the remote region, is considered to be the necessary means of security work.

cctv system can provide some important areas of close observation, monitoring and control. The system meets the relevant national technical regulations. General television cameras should be set in the system, to achieve all-round monitoring. The main equipment of the system should be configured cctv cameras, VCR Delay and image processor, users can tune to any screen and remote control operation on any remote control ptz camera and zoom function.

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Safety monitoring system composed of instructions

May14
2012 Leave a Comment Written by admin

The typical closed-circuit monitoring system displayed by the camera part, transmission part, control and part of the record and part of the four blocks.

(1) camera part
The camera part of the forefront part of the television monitoring system is the “eyes” of the entire system. Be monitored workplace area, installation of a zoom lens on the camera, the camera can observe farther and more clearly; can also install the camera on the power head on, you can head to drive the camera level and vertical rotation, so that the camera can cover a greater angle. China Theo monitoring system in some cases, especially in the case of outdoor applications, in order to dust, rain, resistance to high temperature, corrosion resistance, etc., should also install a special shield on the camera and its lens, and even The head must have the appropriate protective measures.

(2) the transmission part
The transmission part is the monitor image signal pathway. In general, the transmission part of the single transfer images, sound signals. Meanwhile, the need to have a control center via the console, camera, lens, PTZ control, and thus the transmission system also includes a control signal transmission.
Commonly used in the transmission mode, close the video cable transmission, not more than twelve kilometers distance commonly used coaxial cable transmission, longer distances can be optical fiber transmission. For long-distance transmission, the need to with the video signal amplifier, the image signal correction and compensation equipment.
Control and part of the record

(3) Control and part of the record
Responsible for the control of the camera and its accessories (such as lens, PTZ), and images, sound signals to be recorded. DVR technology development better, it can not only record images and sound, but also includes a split screen to switch, PTZ camera control and other functions, essentially replaces the screen switches used in the past, Quad, PTZ controller, camera controller, and other products. If a customer asks for PTZ, lens (especially high-speed ball) very easy to control, you can increase with the control of the keyboard.

4 display section
Generally composed by a few or more monitors, LCD monitors are gradually replacing the traditional CRT monitors, commonly used are: Bo display LCD monitor. The number of cameras is not a lot, not very demanding in the case of the monitor is generally directly connected to the DVR base station burglar alarm monitoring system can be. If the camera number, and request multiple monitors on the screen switch shall be equipped with the “Matrix”.
Dedicated monitor is more expensive, can also be used to save money, ordinary TV alternative, but the TV not suitable for 24 hours a day, year-round boot failure rate will be high, and this may cause a fire.

More than four parts combine to form a complete security system!

Monitoring system With the raising the level of development of computers, from analog system to a digital system, digital system functionally sound than the analog system, the operation is extremely intelligent and centralized. The monitoring system is suitable for places include:
Government agencies, electricity telecommunications, prisons, military, banking, treasury, supermarkets, shopping malls, hotels, residential, schools, office buildings, road monitoring.

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Common issues in the application of electric zoom lens

Apr24
2012 Leave a Comment Written by admin

the zoom lens is the C/CS interface , in conjunction with ordinary gun-camera use, zoom , focus , and iris functions can artificially control the CCTV camera in the back-end controller . In general, the electric zoom zoom larger than the commonly used six times , seven times , 10 times the lens focal length mostly less than 100mm , there are 15 times 16 times 20 times 22 times in multiples of focal length mostly between 100mm – 300mm , and further , 30 times 33 times 50 times , 100 times , the general focal length more than 300mm , and some can even reach or exceed 1000mm , particularly suitable for long distance monitoring.

As we all know , power zoom lens used for the outdoor environment , China has a vast spans multiple climate zone, will be subject to the limitations of many of the natural environment , such as fog , high or low temperatures . The application of a long focal length lens , such as conventional decoder and PTZ accuracy has been unable to meet the increasingly demanding requirements , the growth of the Focal length also makes the control focus to become the operating personnel in the work of one of the main means of operation . In addition , although the function of the camera is becoming richer , But it was still unable to achieve flexible settings in the environmental that changes frequently.

Common zoom lens in use will face a number of problems that cannot be avoided:
1, as the telephoto lens used in the round-the-clock monitoring of the environment, application auto-aperture technique is essential. Follow problem is depth of field with the IRIS adjustment to changing, especially the Aperture open all at night, Makes during the day can be clearly observed objects may become blurred.

2, in addition, telephoto lens gives us a more extensive observations of the scene, in the same scene, vision may also appear in the near , medium and long-term , we need to monitor the different distance of the target. Typically monitor staff needs to do is continuously to focus the lens, To achieve the desired observation.

From a long-term perspective, is the irreversible trend of intelligent, Anthropogenic interference with the operation will be less and less. So the best way to solve the above problem is that lens are able to automatic focus like DV machines.

As a high-end lens power zoom lens in the future will certainly occupy an important place in the field of high – end video surveillance, Faced with the challenges of the environment, technology, Power zoom lens is continually improved and mature, Humane and intelligent trend is increasingly evident, I believe in the near future , it will be more humanistic and intelligentized based on more and more understanding to IRIS Lens.

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