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Operation: Road Surveillance Camera Network Surveillance Equipment Monitor
The camera is a front-end device that acquires the image of the surveillance site. It uses the area array CCD image sensor as the core component, plus a synchronization signal generation circuit, a video signal processing circuit, and a power supply. In recent years, new low-cost MOS image sensors have developed rapidly. Cameras based on MOS image sensors have begun to be applied to videophones or conference television systems that do not require high image quality. Since the MOS image sensor's resolution and low illumination are temporarily not comparable to the CCD image sensor until the main index, the use of the camera in the monitoring system is still a CCD camera. The camera is divided into black and white and color, because the black and white camera has the advantages of high resolution, low illumination, and especially it can be imaged under infrared light, so in the television monitoring system, the black and white CCD camera still has a high market share. By the way, the cameras listed in the list of CCTV surveillance equipment are usually without the lens (except for the integrated camera). Therefore, in practical applications, the camera should be fitted with the actual environment of the monitoring site and user requirements. The use of the lens camera is very simple, usually as long as the correct installation of the lens, connecting the signal cable, power can work. However, in actual use, if you do not install the lens correctly and adjust the camera and lens status, you may not achieve the intended effect. Should pay attention to the lens and camera interface, whether it is a C-type interface or a CS-type interface (this must be remembered, otherwise it will most likely damage the camera's CCD chip when the C-type lens is directly screwed onto the CS interface camera).
When installing the lens, first remove the protective cover of the camera and the lens, then gently screw the lens into the lens connector of the camera and put it into place. For auto iris lenses, the lens control line should also be connected to the camera's auto iris interface. For motorized two-variable or three-variable lenses, as long as the lens is rotated into position, it is not necessary to correct its equilibrium state (only after After the focus adjustment is completed, it is necessary to finally correct its equilibrium state).
Adjust Lens Aperture and Focus Off Turn off the on-camera electronic shutter and backlight compensation switch to position the camera at the scene to be monitored, and adjust the lens aperture and focus ring to optimize the image on the monitor. If you use the camera in a place with a large variation in illumination, it is best to connect the auto iris lens and set the camera's electronic shutter switch to OFF. If the manual iris is selected, the camera's electronic shutter switch should be turned ON, and when the application site is brightest (maximum ambient light), the lens aperture should be as large as possible and still make the image the best (can not make the image too much White and overloaded, the lens is adjusted. If you do not pay attention to opening the lens as much as possible when the light is bright, but it is relatively small, the electronic shutter of the camera will be automatically adjusted at a low speed. , so you can still form a good image on the monitor; but when the light is dimmed, because the lens aperture is relatively small, and the electronic shutter has been the slowest (1/50s), the imaging at this time may be It's dark.