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Surveillance Cameras Common Problem And Solution Analysis

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#1 iacemomo

iacemomo

    Private First Class

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Posted 17 August 2012 - 12:27 AM

Surveillance cameras common problem and solution analysis
1, the camera image how to do?
A: First, to confirm whether the camera power supply plus, usually through the indicator to determine. Monitor is normal. Such as whether to switch to the corresponding input channel. Coaxial cable is normal compliance contact. The lens aperture is open. If other reasons, Depot Repair.
Camera image is white What can we do?
A: First see if at the strong light, if a manual iris lens, to see if the aperture opened. If auto iris lens to see if the school will come at a time when too low, so that the aperture open too large. Followed by viewing the camera's exposure settings are correct, the electronic shutter speed is too slow. If other reasons, Depot Repair.
3 camera image color cast how to do?
A: Generally white balance settings to improve the color cast: white balance settings in two ways:
, Automatic white balance, continuous mode - white balance settings will change with the scene color temperature continuously adjust the range of 2800 ~~ 6000K. In this way is most appropriate for the changing situations of the color temperature of the scene during the filming, so that the color performance of the natural scene in little or no white, continuous white balance can not produce the best color. Button way - the first camera alignment such as white walls, white paper and white target, and then appropriated to automatic mode switching from manual to set the location, reservations so far in the position for a few seconds or until the image is white, white balance is executed, the automatic mode switch dial back to the manual position to lock the white balance settings, white balance settings will remain in the camera's memory until the execution was changed again, the range of 2300 ~ 10000K, in this period, even if the camera power will not lose the set. A button to set the white balance is the most accurate and reliable, suitable for most applications.
Manual white balance to open the manual white balance will turn off the automatic white balance, red or blue in changing the image up to 107 levels for adjustment, such as the increase or decrease in the red all one level, increase or reduce the blue all a grade. Times outside of some cameras there are white balance will be fixed in the 3200K (incandescent light level) and 5500K (daylight level), grade command.
The camera lens how to choose?
A: (1) imaging of the lens size? Camera CCD target surface size is consistent, as mentioned earlier, 1/2 in., 1/3 inches, 1/4 inches, and other specifications.
(2) the lens focal length and viewing angle? First according to the camera to target distance of the monitor, select the lens focal length, lens focal length f is determined by the camera target surface determines the vision.
(3) aperture or through the amount of light the lens of the pass light amount of the lens focal length and light through the aperture of the ratio measure as F as marked on each lens are standard have its maximum F value, the amount of light and the F value of the square is inversely proportional to , F value is smaller, the larger the aperture. It should be monitored part of the light changes in the degree of manual iris or auto iris lens.
The lens focal length is calculated?
A: The formula method: field of view and focal length calculation? Field of view means uptake object size, the size of the field of view is the lens to be uptake of the object distance, lens focal head and the size of the imaging identified. ? Lens focal length, field of view size and the lens to the intake of the object distance is calculated as follows; 1, f = WL / W, f = hL / H
f: focal length of the lens
w: the width of the image (the subject is in ccd target surface imaging width)
W: width of the subject
L: is subject to the distance of the lens
h: image height of the scene (the subject is in ccd target surface imaging height) field of view (intake) highly
H: the height of the subject
6. Common video transmission options? Transmission distance is about how much?
A: a coaxial cable (transmission distance of 0-600m), fiber (0-20Km above), wireless (3G or 2G network), the traditional network cable (100m relay), 5 . twisted pair (0-2400m or so, divided into two kinds of active and passive).
Common video transmission options? Transmission distance is about how much?
A: the contention degree of the angle of the infrared light and the lens does not match the result.
8 high-speed ball out of control how to do?
A: 1. High-speed ball address code and address code of the control keyboard. The communication baud rate control keyboard communication protocol with the control of the keyboard. 4 Wiring the RS485 standard.
9 network cameras can not image what is the reason?
A: First check the power indicator light is on, indicating that the camera has power. If the network indicator, see the light on or blinking. Show that the state of the camera networking. (3) Check the client computer network Unicom, in the same subnet with the network camera is not with the camera in the same LAN. The computer can be a normal network connection to provide a basis. Check the IE control is installed correctly. And allowed to run control. 5 aperture of the camera is turned on. That the camera image CCD normally collected by the light of the outside world into the lens. 6 camera color and brightness settings are reasonable.
10 camera image blur is the problem?
A: The camera lens out of focus, you can adjust the back focal of the camera, the camera image is clear.





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