Monitoring equipment mainly includes:
1, all-in-one machine, with dustproof and moisture-proof function, with its own protective cover, can be used indoors and outdoors.
2. Color gun cameras are generally used indoors, but they can also be used outdoors if an outdoor protective cover is added.
3, color hemisphere camera, indoor use, easy to install in places with ceilings.
4. Infrared camera. When there is enough light, this camera is colored. When there is no light and the light is dim, turn on the infrared lamp and monitor it in black and white. Suitable for internet cafes, underground passages, garages and other places with dark light.
Second, the classification of surveillance cameras
According to different uses, surveillance cameras can be divided into industrial and household levels.
1, the industrial monitoring camera should be stable and reliable. In order not to be easily disturbed by the outside world, we will try our best to use wired transmission. Moreover, industrial surveillance cameras are mostly installed outdoors, and they have to withstand the wind and the sun, so they are very different in appearance from household cameras. In addition, waterproof function is also essential for industrial cameras.
2. General home surveillance cameras are not so strict. In order not to affect the overall decoration environment, but also to facilitate installation and save the trouble of wiring, we will try our best to adopt the wireless WiFi transmission mode that is easy to deploy.
3. The video data shot by the camera every day is not small, and the accumulated data is very large.
From the different transmission modes, surveillance cameras can be divided into wired and wireless.
1, cable transmission is stable, fast and not easily interfered by external signals, and it is the mainstream transmission mode of industrial cameras at present.
2. Wireless transmission is convenient, which can break through the limitation of wired, and is very suitable for remote areas without wiring conditions. However, the wireless transmission distance is limited and it is easily interfered by external signals. Wireless transmission includes 3G wireless, WiFi and analog microwave.
3. What should I pay attention to when installing camera monitoring in public places?
1. Install surveillance cameras and the surrounding environment.
When installing a surveillance camera, we should subconsciously pay attention to the surveillance scene. Practice has proved that the surrounding environment plays a vital role in setting up surveillance cameras. You need to consider checking scenes, blind spots, and more extreme variables on the spot. Users should consider the following issues when setting. First, fix the scene and set other variables. Find professional measuring things, calculate the scale of viewing angle, and measure the wiring problem of monitoring system. The second is to carry out actual verification. Open the video channel of the whole monitoring system, check the camera stack and the covered blind area to define the viewing angle value, and leave you room after the system equipment is finished. Of course, different monitoring sites have different degrees of clutter.
2. The surveillance camera captures night vision images.
Through the above analysis, we now have a preliminary understanding of the monitoring light source. When setting the monitoring camera, don't just pay attention to the function of the machine, but also contact some external light sources to adjust it. Especially at night, whether you use infrared lighting or white lighting, the ultimate aspect of monitoring is not the field of view of the camera, but the field of view of infrared or visible light sources. If you don't understand this, it is very likely that night vision monitoring will get a black picture. If night vision monitoring is as clear as daytime, it is necessary to conclude that the supply beam is larger than the camera's field of view. Most lighting fixtures can be adjusted according to the needs of the camera, or the intensity of the light source or the lighting angle is questionable. In order to capture the best picture in a reasonable time, you have to look at the night when debugging the camera, otherwise your camera will become "blind".
3. Install a monitoring camera to observe the light interference.
When monitoring the construction site, the person in charge of monitoring or engineering must help test the situation until the evening. In the process of planning the monitoring scheme, some problems in low illumination environment need to be considered: infrared illumination, thermal imaging camera, etc.
In the real environment, there will be some unexpected problems. Such as street lamps, periodic light sources, sunrise and sunset, reflected light (water or glass), etc. On the bright side, these lights can provide satisfactory light for night vision monitoring without affecting the monitoring; But the bad side is that these light sources can damage your photos in different ways. It's important that you know where they are in order to prevent the latter from happening. If you are too lazy to investigate these lighting problems at night, then the danger lurks in the monitoring at any time.
4. What lens should I choose to install the surveillance camera?
The first thing to understand is that the camera provides users with a certain number of pixels, which reflect useful video information. Changing the lens can provide a wider field of vision, but it cannot provide more pixels. In other words, if you choose a wide-angle snapshot, the picture quality will inevitably decline because the pixels are stable. The picture will be lost during transmission, and the pixels are diluted a little, so the color must not be 100%. Apart from setting basic parameters, few people can find the hidden functions of the camera. As the resolution of the camera is getting higher and higher, its responsibility is getting bigger and bigger. From a distant point of view, if we can provide a wider field of vision for the camera, its intelligent inspection function can also be brought into full play; This helps to prevent occlusion and track potential orbits well.