what is the working principle of surveillance camera PTZ

PTZ is a supporting equipment for installing and fixing cameras, which is divided into two types: fixed and motorized gimbal.

Fixed gimbal is suitable for small-scale monitoring, after installing the camera on the fixed gimbal, the level and pitch angle of the camera can be adjusted, and after achieving a good working attitude, as long as the adjustment mechanism is locked.

The motorized gimbal is suitable for large-area scanning and monitoring, which can expand the monitoring range of the camera.

The motorized gimbal high-speed attitude is achieved by two actuator motors that accept signals from the controller to operate in a safe position. Under the action of the control signal, the camera on the gimbal can not only automatically scan the monitoring area, but also track the monitoring object under the manipulation of the personnel on duty in the monitoring center.

The working principle is to use the camera to capture the wireless WiFi signal in the home after installation. After shooting, you can use WiFi to download the app at the same time, control the camera’s remote control and playback, etc. This is the current trend technology of home camera security, which is very convenient and operated. You can mount a memory card with your camera or you can play it with a memory card.

The principle of mobile phone remote monitoring technology is that hardware acquisition equipment (hard disk recorder, video server) collects image information, transmits it to remote computers and mobile phones, and views it through the Internet.

To achieve these functions, computers and mobile phones must be equipped with software-enabled hardware devices.

There are also mobile phone remote monitoring camera implementation principle: the whole system is based on the Internet, through the surveillance camera placed somewhere for shooting, the captured video picture is compressed by the video server and uploaded to the Internet, transmitted to the video surveillance server of the monitoring center through the network, and then use the mobile phone to access the Internet, log in to the video surveillance server, and then obtain the list of monitoring resources, and then you can choose the surveillance video. It is also easy to control the remote gimbal when the user enters the surveillance screen to ensure that he gets the angle he wants. The front-end surveillance camera terminal accesses the Internet through wired or wired methods, and uses wireless Internet access to realize mobile phone video viewing end.

In addition to the camera is called monitoring is also called probe, its main working principle is to use the installed monitoring head, with wireless transmission or wired monitoring line transmission to the hard disk recorder for saving, and then connect the monitoring software, you can monitor the software in real time preview and retrieval, greatly increasing the dynamic recording of the current space, as well as video saving after the fact

The working principle of the camera is: according to a certain resolution, the point on the image is acquired by interlaced scanning, and when it is scanned to a certain point, the image grayscale at the point is converted into the voltage value corresponding to the grayscale through the image sensor chip, and then the voltage value is output through the video signal terminal.

If the camera continuously scans a line on the image, the output is a continuous voltage signal, and fluctuations in the voltage signal reflect the grayscale change of the line image. When the scan is complete, the video signal terminal outputs a level below the safe video signal voltage (for example, hold for a period of time). This corresponds to a voltage “groove” immediately following each line of image signal, called a sync pulse line, which is a sign of a scan break.

Then, after skipping a line (because the camera is interlaced), start scanning new lines, and so on until the video signal of the field is scanned, and then a -segment blanking area appears. This region has several composite blanking pulses, one of which is wider (i.e., longer than the other), called a field sync pulse, which is a sign of lateral scanning.