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Common troubleshooting of camera and peripheral equipment

2011-10-26

     1. Why use infrared camera, after a period of time, it is found that the lens appears foggy and the image is not clear ?

Because part of the infrared camera is relatively humid when it leaves the factory, after the installation and use for a period of time, the temperature inside the machine rises, and the temperature difference between inside and outside is large, the water will condense into small drops of water, and the small drops of water are attached to the glass , And can not be wiped outside, so the mist will be generated. In addition, during the use, some rosin on the circuit board and the gum products will also be heated and volatilized, and the volatilized things will stick to the glass sheet, making the picture unclear. In the past, the camera used a single glass sheet, which often caused this problem, so the camera was removed and the lens cleaned. Now the camera uses a double glass sheet, which rarely occurs.

2. Debugging of the network camera?

Network cameras include standard network cameras and infrared network cameras. The default IP of Hikvision's network camera is 192.0.0.64 . You must first enter the network camera (register the IP of 192.0.0.64 ), but the computer and the camera must be on the same network segment, and then enter the network camera to change the camera. IP so that the IP of the network camera is on the same network segment as the router we use; however, it must be noted that the gateway of the network camera must be set correctly to access it through the network. Under normal circumstances, we will use auxiliary software to achieve remote control. Now we use the software " Peanut Shell " , apply for a passport and domain name through the software, and then log in to the passport to achieve remote monitoring by accessing the domain name.

3. How to consider the installation position of the camera when installing the camera?

Under normal circumstances, we will survey the site before making a plan to understand the site situation; then, when we survey the site, we will consider the location of the camera installation according to the site conditions. The standard camera should consider: the intensity of the light, whether it is backlit, do not shoot with the lighting equipment, whether it will be affected by the outside world, etc .; the infrared camera should consider: reflective, do not shoot with the lighting equipment or objects with smooth surfaces, two Do not shoot at infrared cameras; take care to avoid strong electricity to avoid interference from strong electricity.

4.Why the camera cannot see the human face clearly ?

There are two possibilities for a standard camera, one lens, one camera; change one lens first, and see if you can adjust the focus. If it works, there is a problem with the lens. If not, you need to change the camera during debugging. There are two aspects, including One is definitely a problem; if it is an infrared camera, it may be that the lens is not adjusted in focus, and it needs to be readjusted. It may be that the glass in front of the camera is not clean, or it may be a quality problem of the camera. If it is an integrated zoom camera, it may be The focus problem may also be a quality problem of the camera. However, the wide-angle lens cannot clearly see the human face on the screen, while the telephoto lens does the opposite.

5.How should the outdoor camera be protected from lightning ?

There are three types of lightning protection for outdoor cameras: power supply lightning protection, control signal lightning protection, and video signal lightning protection. Lightning protection products now have 2 in 1 and 3 in 1 ; 2 in 1 is the combination of video signal and power supply, the power supply is 12V , 24V and 220V , you can choose according to your needs, 3 in 1 is the video signal, power supply and The control signal line is three-in-one, and the power source can also be selected. The control signal is the 485 control voltage, which can be installed in the place where there is a ball machine. If we installed a lightning arrester on the front-end camera, then our terminal must also be equipped with a lightning arrester. The lightning protection of outdoor cameras is mainly anti-induction lightning, so when we use 2-in - 1 or 3-in - 1 lightning protection products, the grounding must be reliable; we use multi-channel lightning protection devices installed in the machine room, and the grounding is also It must also be reliable. In this way, the system's lightning protection measures will be effective.

6. The other channels of the DVR are displayed normally. Why is there no video displayed on one channel ?

There are four possible reasons for this failure : one is the DVR , the other is the line and connector, the third is the camera power, and the fourth is the camera. First, replace the channel, and replace the problem channel with the channel that is normally displayed. It can be judged whether it is a terminal problem. Next, check the wiring and connectors. Use the short-circuit measurement method to detect whether there is a problem with the wiring, and then check the camera power. Measure the output voltage, finally check the camera, take it down and take it to the DVR , and directly test the quality of the camera without transmitting through the intermediate cable.

Detection object: line and connector, camera power, camera, DVR

7. When using DVR , why is the image dimmed and two screens keep flashing?

The image is dark, it may be caused by electromagnetic interference on site, and it may be a problem with the system. First, start with the system, replace the channel, and replace the problem channel with the normal channel. You can determine whether it is a problem with the host. Check the power of the camera, turn the power on after turning off, observe whether the picture changes, and measure whether the output voltage is stable. , Check the connector, unscrew the connector jacket, observe whether the welding point is in good contact, check the camera, remove it and get it next to the DVR , directly test the quality of the camera, do not transmit through the intermediate cable, and there is the interference of the electromagnetic field nearby, It depends on how to shield the magnetic field.

Detection object: camera, power supply, connector, host, interference