With the development and demand of the monitoring industry, intelligent automatic tracking generally uses panoramic cameras combined with high-speed domes or high-speed heads to increase work efficiency.
PTZ selection
PTZ can be simply understood as a base that can rotate freely in all directions (360° horizontal, 90° vertical). The use of the head to expand the camera's field of vision. In the television monitoring system, places that need to be monitored by the tour, such as halls, playgrounds, plazas, etc., often use PTZ.
PTZ is generally divided into ordinary type and ball type PTZ. Ordinary pan/tilt heads are bare pan/tilt heads. Camera guards are required to install cameras; ball heads are built-in pan/tilt heads, and global or semi-spherical shrouds are external, so ball heads are more beautiful than ordinary heads. Concealed and easy to install.
First, when choosing a PTZ, the following points must be noted:
(1) Identify indoor and outdoor installations. Outdoor PTZ is better than indoor PTZ waterproof, corrosion resistance, constant temperature and impact resistance, to adapt to outdoor complex climatic conditions, its weight and carrying capacity are also greater than indoor PTZ.
(2) According to special environmental requirements. Such as hotels, communities, government agencies, office buildings and other places, generally have higher requirements for concealment after installation, and therefore more use of ball-type PTZ. It should be noted that because the indoor hemispherical pan tilt needs to be embedded and installed, if the top of the wall cannot be hollowed out, it cannot be installed.
(3) If you add infrared light to the camera, you must use the ordinary head. Ball heads cannot mount infrared lights.
(4) Since the ball head does not have a mechanical wiper, if the wiper function must be used, only the ordinary head can be used with a wiper boot.
PTZ troubleshooting
A pan/tilt will not operate quickly or at all after it is used. It is a common fault of the PTZ. The appearance of this situation, apart from the factors of product quality, is generally caused by the following reasons:
(1) Only the pan/tilt that is mounted on the camera is allowed to use the lifting method. In this case, the hoisting method leads to an increase in the operational load of the pan-tilt. Therefore, soon after use, the pan-tilt mechanism will be damaged, and even the motor will be burned.
(2) The total weight of the camera and its protective cover exceeds the weight of the PTZ. Especially for PTZs that are used outdoors, the weight of the protective cover is often too large, and there is often the problem that the PTZ will not move (especially the vertical direction).
(3) The outdoor pan/tilt head is faulty or even damaged due to poor ambient temperature, too low, waterproof, and frost-proof measures.
2. When the distance is too far, the keyboard cannot be controlled by the decoder on the camera (including the lens) and the head.
This is mainly because when the distance is too far, the control signal is attenuated too much and the control signal received by the decoder is too weak. At this time, a relay box should be installed at a certain distance to amplify the shaping control signal.
3, the monitor image contrast is too small, the image is light.
This phenomenon is not the problem of controlling the host computer and the monitor itself, that is, the transmission distance is too long or the attenuation of the video transmission line is too large. In this case, the line amplification and compensation device should be added.
4, the image clarity is not high, the details are lost, serious color signal loss or color saturation is too small.
This is due to the fact that the loss of the high-frequency end of the image signal is too large, resulting in the basic loss of signals above 3 MHz. In this case, either the transmission distance is too long and there is no amplification compensation device in the middle; or the distribution capacitance of the video transmission cable is too large; or the equivalent capacitance is concentrated in the transmission link between the core wire and the shielded wire. Caused.
Hue distortion
This is a fault phenomenon that easily occurs in long-distance video baseband transmission. The main reason is caused by the large phase shift of the high frequency band caused by the transmission line. In this case, a phase compensator should be added.
Operation keyboard failure
This phenomenon can basically be determined as the "deadlock" of operating the keyboard when there is no problem in checking the connection. On the operating instructions of the keyboard, there are generally methods to solve the "crash", such as "reset the whole machine" and other methods, this method can be used to solve. If it cannot be solved, it may be that the keyboard itself is damaged.
The host does not clean the image
This failure phenomenon is manifested in the screen after the selection, the interference of other pictures superposed, or the interference of the line synchronization signals of other pictures. This is due to the poor quality of the host or matrix switch and the lack of isolation between images.
PTZ selection
PTZ can be simply understood as a base that can rotate freely in all directions (360° horizontal, 90° vertical). The use of the head to expand the camera's field of vision. In the television monitoring system, places that need to be monitored by the tour, such as halls, playgrounds, plazas, etc., often use PTZ.
PTZ is generally divided into ordinary type and ball type PTZ. Ordinary pan/tilt heads are bare pan/tilt heads. Camera guards are required to install cameras; ball heads are built-in pan/tilt heads, and global or semi-spherical shrouds are external, so ball heads are more beautiful than ordinary heads. Concealed and easy to install.
First, when choosing a PTZ, the following points must be noted:
(1) Identify indoor and outdoor installations. Outdoor PTZ is better than indoor PTZ waterproof, corrosion resistance, constant temperature and impact resistance, to adapt to outdoor complex climatic conditions, its weight and carrying capacity are also greater than indoor PTZ.
(2) According to special environmental requirements. Such as hotels, communities, government agencies, office buildings and other places, generally have higher requirements for concealment after installation, and therefore more use of ball-type PTZ. It should be noted that because the indoor hemispherical pan tilt needs to be embedded and installed, if the top of the wall cannot be hollowed out, it cannot be installed.
(3) If you add infrared light to the camera, you must use the ordinary head. Ball heads cannot mount infrared lights.
(4) Since the ball head does not have a mechanical wiper, if the wiper function must be used, only the ordinary head can be used with a wiper boot.
PTZ troubleshooting
A pan/tilt will not operate quickly or at all after it is used. It is a common fault of the PTZ. The appearance of this situation, apart from the factors of product quality, is generally caused by the following reasons:
(1) Only the pan/tilt that is mounted on the camera is allowed to use the lifting method. In this case, the hoisting method leads to an increase in the operational load of the pan-tilt. Therefore, soon after use, the pan-tilt mechanism will be damaged, and even the motor will be burned.
(2) The total weight of the camera and its protective cover exceeds the weight of the PTZ. Especially for PTZs that are used outdoors, the weight of the protective cover is often too large, and there is often the problem that the PTZ will not move (especially the vertical direction).
(3) The outdoor pan/tilt head is faulty or even damaged due to poor ambient temperature, too low, waterproof, and frost-proof measures.
2. When the distance is too far, the keyboard cannot be controlled by the decoder on the camera (including the lens) and the head.
This is mainly because when the distance is too far, the control signal is attenuated too much and the control signal received by the decoder is too weak. At this time, a relay box should be installed at a certain distance to amplify the shaping control signal.
3, the monitor image contrast is too small, the image is light.
This phenomenon is not the problem of controlling the host computer and the monitor itself, that is, the transmission distance is too long or the attenuation of the video transmission line is too large. In this case, the line amplification and compensation device should be added.
4, the image clarity is not high, the details are lost, serious color signal loss or color saturation is too small.
This is due to the fact that the loss of the high-frequency end of the image signal is too large, resulting in the basic loss of signals above 3 MHz. In this case, either the transmission distance is too long and there is no amplification compensation device in the middle; or the distribution capacitance of the video transmission cable is too large; or the equivalent capacitance is concentrated in the transmission link between the core wire and the shielded wire. Caused.
Hue distortion
This is a fault phenomenon that easily occurs in long-distance video baseband transmission. The main reason is caused by the large phase shift of the high frequency band caused by the transmission line. In this case, a phase compensator should be added.
Operation keyboard failure
This phenomenon can basically be determined as the "deadlock" of operating the keyboard when there is no problem in checking the connection. On the operating instructions of the keyboard, there are generally methods to solve the "crash", such as "reset the whole machine" and other methods, this method can be used to solve. If it cannot be solved, it may be that the keyboard itself is damaged.
The host does not clean the image
This failure phenomenon is manifested in the screen after the selection, the interference of other pictures superposed, or the interference of the line synchronization signals of other pictures. This is due to the poor quality of the host or matrix switch and the lack of isolation between images.
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