[ Huaqiang Security Network News ] When installing, we need to understand the monitoring equipment. The monitoring equipment is mainly divided into: cloud platform, bracket, protective cover, monitor, video amplifier, video splitter, video switcher, picture splitter, video recorder. Big step. 
1 Yuntai
In the previous introduction, we often mentioned the gimbal, but some people don't have any perceptual knowledge about it. In fact, the gimbal is an installation platform composed of two alternating currents, which can move horizontally and vertically. What we call the PTZ is different from the PTZ in the photographic equipment. The PTZ of the photographic equipment is generally just a tripod, which can only be adjusted by hand. The monitoring system says that the PTZ is remotely controlled by the control system. Can control the direction of its rotation. There are many types of cloud platforms: indoor and outdoor according to the use environment. The main difference is that the outdoor sealing performance is good, waterproof, dustproof and load-bearing. It is divided into side loading and lifting according to the installation method, that is, whether the gimbal is installed on the ceiling or on the wall. According to the shape, it is divided into ordinary type and spherical type. The spherical head is placed in a hemispherical and spherical protective cover. In addition to preventing dust from interfering with images, it is also concealed, beautiful and fast. When selecting the PTZ, consider the installation environment, installation method, working voltage, load size, and also consider the performance price ratio and appearance.
2 bracket
If the camera only needs to rotate to monitor a certain position, then only the camera bracket can meet the requirements. Ordinary camera brackets are simple to install, inexpensive, and available in a wide variety. Ordinary brackets are short, long, straight, and curved, and different models are selected according to different requirements. The outdoor bracket mainly considers whether the load capacity meets the requirements, and then the installation position, because from the practice we found that many outdoor cameras are installed in special positions, some are installed on the poles, some are standing on the tower cranes, some are installed in the iron On the shelf... For various reasons, the existing brackets may be difficult to meet the requirements and require additional processing or improvement, so I won't say more here.
3 protective cover
The protective cover is also one of the most commonly used devices in the monitoring system, mainly divided into indoor and outdoor. The main difference between the indoor protective cover is the size, the appearance is beautiful, and the surface treatment is qualified. The function is mainly dustproof and vandal proof. The outdoor shield must have a good sealing performance to ensure that rainwater does not enter the shield and erode the camera. Some outdoor shields also have exhaust fans, heating plates, and wipers to better protect equipment. When the weather is too hot, the exhaust fan works automatically; when it is too cold, the heating plate works automatically; when there is rain on the cover glass, the wiper can be activated by the control system. When selecting the protective cover, look at the overall structure. The fewer the mounting holes, the better the waterproofing. Then, whether the internal wiring is easy to connect, and finally consider the appearance, weight, mounting seat, and so on.
4 monitor
The monitor is the standard output of the monitoring system, and with the monitor we can view the images sent from the front end. The monitor is divided into color, black and white, and the size is 9, 10, 12, 14, 15, 17, 21 inches, etc., commonly used is 14 inches. The monitor also has a resolution, which is represented by the number of lines as the camera. In actual use, the number of monitor lines is generally required to match the camera. In addition, some monitors also have audio input, s-video input, rgb component input, etc., except for the audio input monitoring system, most of the other functions are used for image processing, and will not be introduced here.
5 video amplifier
When the video transmission distance is relatively long, it is better to use a video line with a thicker line diameter, and at the same time, a video amplifier can be added in the line to enhance the signal strength to achieve long-distance transmission. The video amplifier can enhance the brightness, chrominance and sync signal of the video, but the inter-line interference signal will also be amplified. In addition, too many video amplifiers cannot be connected in series in the loop, otherwise saturation will occur and the image will be distorted.
6 video distributor
One video signal corresponds to one monitor or video recorder. If you want the image of one camera to be sent to multiple managers, it is best to choose a video distributor. Because the parallel video signal has a large attenuation, after being sent to multiple output devices, the image will be seriously distorted due to impedance mismatch and the like, and the line is unstable. In addition to impedance matching, the video splitter also has video gain, so that the video signal can be sent to multiple output devices simultaneously without being affected.
7 video switcher
Multi-channel video signals should be sent to the same monitor, and one video can correspond to one monitor. However, the monitor occupies a large area and is expensive. If you do not require monitoring at all times, you can add a switcher in the monitoring room to turn the camera. The output signal is connected to the input end of the switch, and the output end of the switch is connected to the monitor. The input end of the switch is divided into 2, 4, 6, 8, 12, 16 channels, and the output end is divided into single channel and dual channel, and It is also possible to switch audio simultaneously (depending on the model). The switch has two modes of manual switching and automatic switching. The manual mode is to switch which way to switch which way to see; the automatic mode is to let the preset video switch in sequence, and the switching time can be adjusted by a knob. Usually between 1 second and 35 seconds. The price of the switch is cheap (usually only three or five hundred yuan), the connection is simple, and the operation is convenient, but only one image in the input can be seen in one time period. To view multiple camera images simultaneously on a single monitor, you need a screen splitter.
8-screen splitter
The picture splitter has four divisions, nine divisions and sixteen divisions. It can display images of 4, 9, or 16 cameras simultaneously on one monitor, or can be sent to the recorder for recording. Four-division is one of the most commonly used devices, and its performance and price ratio are also good. The quality and continuity of the image can meet most of the requirements. The nine-segment and sixteen-segmentation prices are more expensive, and the resolution and continuity of each image after segmentation will decrease, and the video recording effect is not good. There are also six-, eight-, and four-divided devices, but the image ratio, resolution, and continuity are not ideal, and the market usage is smaller. In addition to displaying images at the same time, most of the splitters can also display a single frame, which can superimpose time and characters, set automatic switching, and connect alarm devices.
9 recorder
The most commonly used recording devices in surveillance systems are civilian video recorders and long-delay video recorders. Because of their ease of operation, videotapes are easy to store and purchase. Unlike the home video recorder, the time-lapse recorder can work for a long time, can record 24 hours (using ordinary vhs video tape) or even hundreds of hours of images, can be connected to the alarm equipment, automatically receive the alarm signal, can superimpose the time and date, can be compiled Video recorder automatic recording program, select the recording speed, the tape will automatically stop or rewind after the end of the tape... The performance of the time-lapse recorder is outstanding, but the price is not high, and the current resolution is not very high. Part of it will be lost, and the playback image will be a jump.
In the previous introduction, we often mentioned the gimbal, but some people don't have any perceptual knowledge about it. In fact, the gimbal is an installation platform composed of two alternating currents, which can move horizontally and vertically. What we call the PTZ is different from the PTZ in the photographic equipment. The PTZ of the photographic equipment is generally just a tripod, which can only be adjusted by hand. The monitoring system says that the PTZ is remotely controlled by the control system. Can control the direction of its rotation. There are many types of cloud platforms: indoor and outdoor according to the use environment. The main difference is that the outdoor sealing performance is good, waterproof, dustproof and load-bearing. It is divided into side loading and lifting according to the installation method, that is, whether the gimbal is installed on the ceiling or on the wall. According to the shape, it is divided into ordinary type and spherical type. The spherical head is placed in a hemispherical and spherical protective cover. In addition to preventing dust from interfering with images, it is also concealed, beautiful and fast. When selecting the PTZ, consider the installation environment, installation method, working voltage, load size, and also consider the performance price ratio and appearance.
2 bracket
If the camera only needs to rotate to monitor a certain position, then only the camera bracket can meet the requirements. Ordinary camera brackets are simple to install, inexpensive, and available in a wide variety. Ordinary brackets are short, long, straight, and curved, and different models are selected according to different requirements. The outdoor bracket mainly considers whether the load capacity meets the requirements, and then the installation position, because from the practice we found that many outdoor cameras are installed in special positions, some are installed on the poles, some are standing on the tower cranes, some are installed in the iron On the shelf... For various reasons, the existing brackets may be difficult to meet the requirements and require additional processing or improvement, so I won't say more here.
3 protective cover
The protective cover is also one of the most commonly used devices in the monitoring system, mainly divided into indoor and outdoor. The main difference between the indoor protective cover is the size, the appearance is beautiful, and the surface treatment is qualified. The function is mainly dustproof and vandal proof. The outdoor shield must have a good sealing performance to ensure that rainwater does not enter the shield and erode the camera. Some outdoor shields also have exhaust fans, heating plates, and wipers to better protect equipment. When the weather is too hot, the exhaust fan works automatically; when it is too cold, the heating plate works automatically; when there is rain on the cover glass, the wiper can be activated by the control system. When selecting the protective cover, look at the overall structure. The fewer the mounting holes, the better the waterproofing. Then, whether the internal wiring is easy to connect, and finally consider the appearance, weight, mounting seat, and so on.
4 monitor
The monitor is the standard output of the monitoring system, and with the monitor we can view the images sent from the front end. The monitor is divided into color, black and white, and the size is 9, 10, 12, 14, 15, 17, 21 inches, etc., commonly used is 14 inches. The monitor also has a resolution, which is represented by the number of lines as the camera. In actual use, the number of monitor lines is generally required to match the camera. In addition, some monitors also have audio input, s-video input, rgb component input, etc., except for the audio input monitoring system, most of the other functions are used for image processing, and will not be introduced here.
5 video amplifier
When the video transmission distance is relatively long, it is better to use a video line with a thicker line diameter, and at the same time, a video amplifier can be added in the line to enhance the signal strength to achieve long-distance transmission. The video amplifier can enhance the brightness, chrominance and sync signal of the video, but the inter-line interference signal will also be amplified. In addition, too many video amplifiers cannot be connected in series in the loop, otherwise saturation will occur and the image will be distorted.
6 video distributor
One video signal corresponds to one monitor or video recorder. If you want the image of one camera to be sent to multiple managers, it is best to choose a video distributor. Because the parallel video signal has a large attenuation, after being sent to multiple output devices, the image will be seriously distorted due to impedance mismatch and the like, and the line is unstable. In addition to impedance matching, the video splitter also has video gain, so that the video signal can be sent to multiple output devices simultaneously without being affected.
7 video switcher
Multi-channel video signals should be sent to the same monitor, and one video can correspond to one monitor. However, the monitor occupies a large area and is expensive. If you do not require monitoring at all times, you can add a switcher in the monitoring room to turn the camera. The output signal is connected to the input end of the switch, and the output end of the switch is connected to the monitor. The input end of the switch is divided into 2, 4, 6, 8, 12, 16 channels, and the output end is divided into single channel and dual channel, and It is also possible to switch audio simultaneously (depending on the model). The switch has two modes of manual switching and automatic switching. The manual mode is to switch which way to switch which way to see; the automatic mode is to let the preset video switch in sequence, and the switching time can be adjusted by a knob. Usually between 1 second and 35 seconds. The price of the switch is cheap (usually only three or five hundred yuan), the connection is simple, and the operation is convenient, but only one image in the input can be seen in one time period. To view multiple camera images simultaneously on a single monitor, you need a screen splitter.
8-screen splitter
The picture splitter has four divisions, nine divisions and sixteen divisions. It can display images of 4, 9, or 16 cameras simultaneously on one monitor, or can be sent to the recorder for recording. Four-division is one of the most commonly used devices, and its performance and price ratio are also good. The quality and continuity of the image can meet most of the requirements. The nine-segment and sixteen-segmentation prices are more expensive, and the resolution and continuity of each image after segmentation will decrease, and the video recording effect is not good. There are also six-, eight-, and four-divided devices, but the image ratio, resolution, and continuity are not ideal, and the market usage is smaller. In addition to displaying images at the same time, most of the splitters can also display a single frame, which can superimpose time and characters, set automatic switching, and connect alarm devices.
9 recorder
The most commonly used recording devices in surveillance systems are civilian video recorders and long-delay video recorders. Because of their ease of operation, videotapes are easy to store and purchase. Unlike the home video recorder, the time-lapse recorder can work for a long time, can record 24 hours (using ordinary vhs video tape) or even hundreds of hours of images, can be connected to the alarm equipment, automatically receive the alarm signal, can superimpose the time and date, can be compiled Video recorder automatic recording program, select the recording speed, the tape will automatically stop or rewind after the end of the tape... The performance of the time-lapse recorder is outstanding, but the price is not high, and the current resolution is not very high. Part of it will be lost, and the playback image will be a jump.
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