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PTZ option note
1, protection class. The degree of protection is very important for the outdoor environment. It can be applied to the outdoor environment in accordance with IP65. However, IP66 or higher protection is recommended for the harsher climatic conditions and to extend the life of the equipment and improve the feasibility of the gimbal. Grade will be preferred.
2, speed. PTZ is generally divided into AC fixed speed PTZ and DC variable speed PTZ, AC constant speed PTZ speed is low and constant, DC variable PTZ speed and high speed. AC PTZ level 6~9°/sec, vertical 3~6°/sec is suitable for occasions where fast tracking is not required. DC PTZ level 20°～50°/second, vertical 10°～30°/second is suitable for fast tracking or other occasions requiring high rotation speed. 3ã€Rotating angle PTZ rotation angle is divided into horizontal angle and vertical angle, vertical angle and load. Related to the installation method, the vertical angle of the top mounted pan/tilt head is -90°~40°, the vertical angle of the side mounted pan/tilt head is ±100°, and the horizontal angle can generally reach 345°~365°. Need to ensure that there is no monitoring dead angle, so the vertical angle needs to guarantee -90 ° ~ 20 °, horizontal rotation angle need to ensure 360 ​​°.
4, gear clearance. The gear backlash (GearBacklash) is also called the backlash, which is an important indicator to investigate the accuracy of the pan/tilt rotation. The smaller the gear gap, the higher the accuracy of the pan tilt, especially for high-speed pan/tilt heads or PTZs with preset functions.
5, torque. For a given load head, the greater the torque, the greater the resistance of the PTZ to non-motor starting, which is very important for more severe weather conditions.
6, bearing way and installation. According to the load installation mode, the PTZ has a top loading mode and a side loading mode. When actually selecting, it is necessary to refer to the selection of the load and the awareness of the construction unit. PTZ mounting methods are generally installed, hoisted, ceiling mounted, embedded installation of four, embedded installation is divided into the upper and lower embedded installation, design needs to consider the same when the PTZ loading indicator load The rate of decline will not be recommended if there is no special need for lifting.
7, auxiliary functions. PTZ auxiliary functions include automatic horizontal scanning, preset positions, heaters, etc. The design needs to be determined according to the use environment and the functional requirements of users.
8, spherical, hemispherical head. The above-mentioned PTZ is more suitable for outdoor installation under all-weather conditions. For ball/hemispherical PTZ selection, it is more suitable for the occasions that are beautiful and hidden without the need for smart domes, and spherical/hemispherical heads. The interior space is limited and it is not suitable to install lenses with large and long focal lengths. Ball/hemispherical heads are difficult to clean due to the lower dome cover acting as a protective cover and are therefore not recommended for use in harsh weather conditions.
High-definition camera PTZ selection analysis
In the field of security, the selection and application of the PTZ should be fully capable of carrying the total weight of the camera, lens, and shield, and the total weight of the assembly. Considering that the P/N's load indicators are balanced loads, the PTZ There should be a proper margin when selecting the load. Generally, 1.3 to 1.5 times the load is selected as the load index of the PTZ.