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| CCD camera installation and adjustment
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The installation of the camera: C and
CS, Same of the two way is 1-inch thread are 32 teeth, 1-inch diameter, the
difference is the CCD camera from the distance between different target
surface, C-installed from the base level to focus on The distance of 17.562
mm, than the CS-distance CCD target of an exclusive circle to the length,
CS-distance focus distance of 12.5 millimeters. Do not underestimate this
one after lap, without it, and the camera lens can not be normal focus, the
image blurred. So before installing the camera, first look at the camera and
the camera interface is not the same, if not, we need to change in
accordance with specific circumstances circle. Some cameras do not have to
circle, and the regulation adopted after the ring like (such as Panasonic
products), regulation, regulation with screwdriver screw loose screws on the
Central, Central rotation adjustment, the CCD target surface at this time
will be relatively backward installed base (the former ) Movement, also play
a role in the next lap. In addition (such as SONY, JVC) similar to the
approach adopted after the regulation as part of its general fixed screws in
the side of the camera. Screw loose, adjust the top of a gear, so that
images can also be modified to clear and do not have to circle.
AGC ON / OFF (AGC): camera with a CCD will come from the signal
amplification to use the standard video amplifier, that is, to enlarge its
gain, equivalent to a higher degree of sensitivity, but the bright light of
the circumstances Amplifiers will overload, so that the video signal
distortion. When the switch in the ON, in low light conditions completely
open the lens aperture, automatically increase the gain to obtain a clear
image. In OFF switch, in low light available under the natural and low-noise
image.
ATW ON / OFF (Auto White Balance): Switches transferred ON, through the
lens to detect the source of / color temperature, thereby automatically set
for white-level, even if the characteristics / color temperature change can
also control the red and blue signals The gain.
ALC / ELC (automatic brightness control / electronic brightness control):
When you select ELC, according to electronic shutter into the brightness of
light and automatically change for the CCD image sensor exposure time
(usually from 1 / 50 to 1 / 10000 second consecutive regulation) . Choose
this way, can be fixed manually or automatically ALC alternative aperture
lens aperture lens.
It should be noted that: outdoors or in bright environment, due to
limited control of the ELC, or should we choose ALC lens in some unique
lighting conditions, circumstances may arise following:
¢Ù in the spotlight or brightness of objects such as windows on a strong
tailing or ambiguity.
¢Ú significantly to the flashing images and color reproduction of
instability.
¢Û white balance are cyclical changes in the event of these phenomena, should
use ALC lens.
A fixed-aperture lens used ELC way, the image of the depth of field may be
smaller than the use of ALC received by the lens depth of field. Therefore,
the camera fixed in the fully open aperture and lens used ELC manner. Depth
of field than the use of ALC lens at the small and images on the distant
objects may not focus on.
When the camera is automatically when the lens aperture, the need to switch
transferred ALC way.
BLC ON / OFF (backlight compensation switch): When used without a strong
background lighting to affect the clarity of the central important objects,
should be transferred to switch ON position. Note: ¢Ù When PTZ and
distribution or rapid changes in lighting, suggested that the switch on the
OFF position, because in the ON position, the lens aperture slows down; ¢Ú If
the object is not required for the middle image, backlight compensation may
not Will fully play its role.
LL / INT (synchronous selection switch): This switch to choose camera
synchronized manner, INT for the simultaneous 2,1 interlaced sync; LL
synchronization for power. Some cameras have a simultaneous phase LL PHASE
power controller. When the camera for use in power synchronous state, this
device to adjust the video output signal phase, the adjustment range is
probably the one. (Adjustment requires professionals)
VIDEO / DC (Lens control signal selection switch): ALC automatic lens
aperture control signals there are two, when the DC control signals will
need the automatic aperture camera lens installed in the head, they should
choose DC location, need to install the video control signals Auto aperture
lens, we should choose VIDEO position.
When you select ALC automatic lens aperture video drivers, there will be a
video level control (VIDEO LEVEL L / H) may need to adjust the controller to
automatically adjust the output of the lens aperture control level, to
control the lens aperture open And the narrow (Aojin Bright).
In camera accessories, a black small plugs, a four-pin plug, connect the
camera head black socket. If DC-driven auto iris lens, lens has made a plug,
as long as inserted in the socket, the selection switch transferred to DC if
using video-driven automatic lens aperture, requires the user manuals on the
basis of the mark, with Iron welding good. As the definition of different
manufacturers, so there are differences between welding method, please pay
attention at the time of installation.
SOFT / SHARP (details level selector switch): The switch to adjust the
output image is clear (SHARP) or smooth (SOFT), usually in SHARP default
position.
FLICKERLESS (without flashing method): Power in the frequency of 50 Hz
region, CCD accumulated time of 1 / 50 seconds, if you use NISC standard
video camera, its vertical synchronization frequency of 60 Hz, this will not
cause visual images simultaneously, in the Monitor on There flashing the
contrary, in power for 60 Hz with PAL formats in the camera will be like
this now. In order to overcome this is like, in electronic shutter set up a
stall without flashing way, the NISC standard video camera to provide 1 /
100 second, the PAL standard video camera to provide 1 / 120 second fixed
shutter speed, can prevent a flickering image on the monitor. Manual
electronic shutter: Some users CCD velocity faster uptake of objects, if the
end of 1 / 50 second speeds, will produce tailing phenomenon, which has
seriously affected image quality. Some are given a camera shutter electronic
manual, so that the charge-coupled CCD at a fixed rate of value, such as 1 /
500, 1 / 1000, 1 / 2000 second, and so on, at this time of the CCD speed of
the charge-coupled, this collection Images from the relatively less tailing
phenomenon, but also for observing high speed electric spark or a class of
objects, you must use this setting. Therefore, some dedicated camera shutter
is given electronic manual, available to the special purpose of the user.
Manual electronic shutter adjustments need to see random statement, in this
not in a repeat.
Added: There are many user requirements at night without the light of the
environment monitoring, please note: As the CCD camera is also relying on
light reflection to imaging, if there is no light, its image would be dark
with a lot of snow. How do I get this image » One approach is to increase
visible light, such as street lamps, searchlights, a rise in infrared light
(especially the requirement that light can not install the occasion), color
CCD camera, infrared lights on the response not enough, there are some
dual-use color cameras day and night The first in the evening will be
automatically converted into black and white mode. Therefore, your control
system requirements for night use, we must use black-and-white CCD camera.
Infrared lights are indoor, outdoor, long distance and short distance of the
points, commonly used indoor 10-20 metres of the infrared light, the walls
of reflection, the images were good; spent on outdoor long-range effects on
the infrared light will not be Ideal, but expensive, less than necessary, do
not normally use.
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