Analytical integration camera

Probably in the late 1990s, a product that made the surveillance industry excited to make great strides toward project applications, that is, high-speed ball. The small size, high speed, preset position, and continuous 360-degree rotation make these traditional features of the conventional pan/tilt shield series dwarf, unless in its special applications, the high-speed ball seems to have become a high-end customer. The second choice.

However, the high-speed ball is expensive. Driven by market demand and price factors, next to the high-speed ball, the camera maker has found a good thing to add the corresponding interface board on the camera movement in the high-speed ball to the chassis. A new type of camera has been produced: it has an electric three-magnification zoom lens, a DSP processing chip, a rich menu of functions, and powerful personalized features. The most popular feeling is that the camera and the three variables can be used together. This was definitely a dazzling product at the time, and both the engineering and the users were very fond of it. Its length is only half or even 1/3 of the original camera plus lens, so that it is a good cover and aesthetics; due to the built-in electric three variable lens, the camera installation and debugging is extremely convenient, and at the same time, these cameras have automatic Aperture and autofocus features also come with characters. In particular, the movement of this kind of camera can come from the production line of civilian cameras, which greatly reduces the cost. Therefore, the market began to develop. In order to distinguish the traditional way of separating the original camera from the three variable lenses, it is common for everyone to call such a built-in electric three-variable lens camera as an integrated camera.

Since then, there have been a variety of camera combinations, such as a combination of a manual zoom lens and a camera, an infrared light tube, a combination of a manual zoom lens and a video camera, a protective cover, a stand, a manual zoom lens, and a camera, but no one ever calls them. For the integrated camera, once one mentions the integrated camera, people still think of cameras with built-in electric three-variable lenses. It can be seen that the concept has a far-reaching impact.

Issues to pay attention to when purchasing firstly, in terms of indicators, integrated cameras generally use 1/4-inch CCD, the near-end focal length in the 3-4mm, remote focal length in the 90mm or so, although the magnification is large (at present, most products are in 22 More than twice), the observable distance may not be as far as it is supposed to be, and it is not like the normal 1/3 inch 11-110mm 10x lens. If you say 10 times, you can look at the distant objects. The effect is similar to that of the 27x integrated camera. Therefore, you should pay attention when purchasing. In addition, because the matched lenses use 1/4-inch specifications, the amount of light passing through will also be relatively small and the sensitivity will be reduced. This should also be considered.

In terms of functions, the following points are mainly considered: Are there day and night conversions, whether there is infrared sensing, how much operating voltage is, how much power is, which is related to the decoder, and it cannot be careless; whether there is real backlight compensation, this problem sounds ridiculous Actually, some manufacturers do not know what to consider, the backlight compensation is simply to increase the image brightness, the result is not as good as 90% of the circumstances do not turn on the backlight compensation function, which can only be found through testing, the manual can not tell you . In addition, some integrated cameras may have serious color cast at 4 or 5 pm, which may be due to poor handling of filters or lenses, which must be tested to find out.

Since the integrated camera is widely used on a uniform ball, its interface mode is very important. Some integrated cameras use a single plug-in interface, and the interface connection is rough. As a result, when the camera rotates in the ball, power failure or control out-of-control failures constantly occur, and such failures are difficult to solve. Therefore, it is better to use a crimped interface. Of course, when used in a general protective cover, since the camera is fixed relative to the protective cover, there is no such problem.

In addition, most integrated cameras have a camera communication interface, there are RS-485, there are RS-232, because these interfaces are mostly multiplexed with the lens control terminal, so you have to determine how to achieve port function conversion, Because the conversion of the control cameras of some integrated cameras is achieved by controlling the time of the lens, if such cameras are installed, it is necessary to explain this to the user. Otherwise, once the control time is too long, it will jump out of the menu, confusing users. Pay attention to the video format problem. Perhaps the reason for the instability of the supply of the integrated camera movements is that the integrated cameras provided by individual manufacturers will have the NISC system. This problem is often not easy to find because the current monitors are compatible with multiple systems, PAL system and NISC system. The images are all displayed well in the above, but once the camera is connected to the hard disk recorder or video server, the problem comes. If the hard disk recorder or video server has "determined" standard setting function, otherwise we have to see strange. The image is up.

Tips for installation Do not completely trust the instructions. Do not know why, in many current integrated camera products, to find a decent manual is not easy, and some pages, rough printing, some models are not on, some content is full of errors, and even Some listed false indicators. In short, don't let the instructions be confused. It is also for this reason that many old construction companies have developed the habit of not reading the manuals. Some of them are directly looking for businesses. The problem is that many businesses are also ignorant of the facts. Many times they still find manufacturers. Therefore, to buy such a product, the engineering firm can only grope while inquiring and at the same time revise the specification. Otherwise, maintenance will become a problem in the future.

Do not use hard-wired connections. Many integrated cameras are used in constant-speed balls. Zooming, focusing, and camera power are all required to be connected to the built-in decoder board. First-time installation of such equipment should be done without notice. Hard lines such as wire, because this will not turn a few times, the line will be broken, it is easy to cause short circuits and other failures.

Pay attention to ground interference. Since most integrated cameras use DC12V power supply, many manufacturers connect the grounding of the DC12V to the enclosure. Special attention must be paid to the installation. Because some metal components in the shield form a connection to the earth, this will result in Because of the interference caused by the ground potential difference, when installing such cameras, we must pay attention to the "ground" connection between the camera and the earth, forming a "floating ground."

Debugging should pay attention to the problem should pay attention to the wide-angle end do not take in the hood edge. Whether it is an ordinary protective cover, a full-day protective cover or a dome cover, first walk the zoom from afar to a few times to see if there is a cover on the image, and adjust the position of the camera and the position of the gimbal in the dome cover. , find the right camera position, of course, this work should be done in the tuning machine, and then a lot of mind to install.

Does auto focus need to be turned off. One of the most important features of the all-in-one camera is auto focus. This function brings us unparalleled convenience in image surveillance work, but it is not suitable for all places. For example, when observing the target at night, the interference of the headlights will make the autofocus unable to stabilize the focus, not only the visual fatigue of the monitor personnel, but also the recording of the image data, especially if the video server is used, it will need The amount of data transmitted increases dramatically, increasing the burden on the network and the codec equipment. Therefore, the autofocus function should be turned off at this time, but it should be noted that not all integrated cameras provide autofocus on and off functions.

Pay attention to the power of the camera. If the integrated camera is installed on a uniform ball or with an intelligent outdoor pan/tilt, the power supply is often provided by a built-in decoder board. Since the built-in decoder board is limited by space, power supply will not be too great, and the power of different integrated cameras will differ. Larger, if the optional integrated camera power is too high, the power of the decoder board may not be able to stand. It is particularly worth mentioning that the aperture and focus are not idle during the zoom operation.

Priority mode. Many integrated cameras have a priority mode. In some special occasions, the application of priority mode will fully respond to the needs of users. For example, in a traffic application environment such as an expressway, the shutter priority will bring high-definition express images, etc. In the case of unsatisfactory image effects, look at which modes in the priority mode can surprise you.

Prepositions. Some integrated cameras have a lens preset function, which is generally used to remotely set or recall a preset position through a communication interface. However, one function is very practical. This is the initial preset function, which can be set. After the lens is turned on, it stays in position. Once we adjust the angle that we need to observe, even if the camera is powered off after power off, the lens will go to the set angle to bring convenience to the user.

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