Speed ​​ball application should pay attention to matters

Speed ​​Dome Application Notes 1. Speed ​​Dome is not suitable for any occasion

Of course, high-speed domes are not suitable for any occasions. High-speed domes are affected by their own construction and are not suitable for some occasions.

At present, most of the high-speed domes on the market have CCD dimensions of 1/4”, which determines their photoelectric conversion efficiency is lower than that of 1/3” CCD gun cameras; in addition, due to the limited size of high-speed domes , And it also needs to accommodate larger zoom optical zoom lens, which determines the size of its optical zoom lens smaller. In addition to almost all fastballs, the optical lens consists of several lens groups, through the refraction of light between these lens groups, reflections, etc., so as to achieve the corresponding optical zoom magnification. Obviously, when the light is refracted and reflected in the lens group, some of the energy will be lost, and therefore the light that enters the CCD will be weak, which also affects the efficiency of photoelectric conversion. Therefore, for applications where there is insufficient illumination, or when it is required that both day and night can be clearly imaged and there is no adequate lighting at night, smart speed domes are not suitable. For example: In some environments where large focal lengths (above 200mm) and poor illumination are required, if a camera with pan/tilt+high performance or large zoom lens is used, the effect will be better than high-speed smart domes. Therefore, the application of high-speed domes must also make appropriate judgments based on the actual monitoring environment.

2. Selection to avoid blind pursuit of high performance, full-angle, high-speed rotation

In the selection of high-speed ball, it is necessary to choose according to actual needs, and to avoid blindly pursuing its high performance, full-angle, high-speed rotation and other performance.

For example, when designing a scheme, a monitoring point needs to install a fast ball. According to the actual installation and use environment, when the fastball is used in a wall or column installation, it can be selected from a non-full-angle (full-angle 360 ​​degrees horizontal direction). Degree, 180 degree rotation in the vertical direction) Rotating fastball. Just think of what happens when the wall-mounted fastball has a horizontal rotation greater than 180 degrees or a vertical selection greater than 90 degrees. - Will be a wall or ground, and this type of screen is meaningless for monitoring. This kind of installation method can choose the economical fast ball that rotates horizontally at 350 degrees and vertical at 90 degrees.

Proper selection of fastball can not only achieve the same monitoring effect, but also significantly reduce system costs. For example, in terms of the configuration of the dome, the rotation angles of the two types of domes differ by only 10 degrees, but their costs may differ by more than 40% due to the different rotating motors. Therefore, in the selection of fastball, it is also necessary to consider the characteristics of monitoring distance and monitoring target, and different optical zooming devices can be selected according to different monitoring distances.

With the increase in the demand for security in the society and the development of the “Safe City” in China, the high-speed ball meets the needs of different levels of security monitoring according to its own characteristics and higher cost performance. Such as outdoor large-scale square for the needs of rotation speed, positioning accuracy, monitoring range; various types of enterprises, factories, entrances and exits for complex lighting environment, the need for adaptability, clarity; and "Safe City" in the construction of complex goals Need for tracking performance, etc. High-speed ball as an important equipment for security monitoring, it will continue to improve in accordance with these needs to improve its intelligent, integrated features to better serve the security monitoring system.

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