What is the reason for the black screen of the surveillance camera?

The reason for the black screen of the surveillance camera is:

1. The power supply of the monitoring camera has failed. The solution to this situation is: if the infrared monitoring camera can see the red light at night, it means that the power supply is normal; If not, you can use a multimeter to measure the power supply and power supply line.

2. There is something wrong with the line. The solution to this situation is: if the line is fine, maybe the camera is broken, you can test it by replacing it and replacing it with a good camera. If there is an image, the camera is broken.

The TV monitoring system can directly watch what happens in the monitoring place and target on the monitor through remote control of cameras, lenses, electric pan-tilt and other equipment. And transmit the image information content of the monitored place and target to a video recorder for recording.

CCD black-and-white and color cameras should be selected as cameras. The horizontal resolution of black-and-white camera is ≥400 lines, and the horizontal resolution of color camera is ≥270 lines. Signal-to-noise ratio should be ≥46dB. Cameras with different sensitivities should be selected according to the illuminance of the monitored object. The minimum ambient illumination of the monitored object should be 10 times higher than that of the camera.

When remote control is needed, you can choose a remote control lens device with optical focusing, aperture opening and zoom. The camera can be a charge coupled device (CCD) camera, which is small in size, light in weight and convenient for field installation and maintenance. According to the working environment, select the corresponding camera protective cover. The protective sleeve can be equipped with temperature control system and remote wiper as required.

The supporting device for fixing the camera at a specific position can adopt a camera bracket or a tripod head. When the camera needs to monitor multiple scenes in different directions, it should be equipped with automatic focusing device and remote control electric pan/tilt. When the camera needs to be hidden, it can be set on the ceiling or wall, and the lens can be pinhole or prism lens.

For the anti-theft system, additional external sensors and system combinations can be installed for linkage alarm. The system and equipment for monitoring underwater targets should adopt high-sensitivity camera tube, sealed pressure-resistant waterproof protective sleeve and water seepage alarm device. The setting position, shooting direction and lighting conditions of the camera shall meet the following requirements:

1, the camera should be installed near the monitoring target where it is not easy to be damaged by the outside world, and the installation position should not affect the operation of field equipment and the normal activities of personnel. Indoor installation height should be 2.5 ~ 5m away from the ground, and outdoor installation height should be 3.5~ 10m away from the ground, and not less than 3.5m. ..

2. The camera in the elevator car should be installed at the top of the elevator car and on the diagonal of the elevator operator, and can monitor the panoramic view in the elevator car.

3. The camera lens should avoid direct glare to ensure that the target surface of the camera tube is not damaged. Within the field of view of the lens, there should be no object blocking the monitoring target.

4. The camera lens should aim at the monitoring target from the light source direction to avoid backlight installation; When the backlight needs to be installed, the contrast of the monitoring area should be reduced.