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在安全防范电视监控系统中,某些场合需要把摄像机置于电动云台上,由电动云台带动摄像机作上、下和左、右转动,以扩大摄像机的视角范围。随着微电子技术的发展,目前摄像机的体积越来越小,因此,以前曾大量使用的交流电动云台除在特殊场合还继续使用外,大多数已不再使用。本人利用录音机的9V或12V直流电机,去掉内部的调速电路而设计制造的直流电动云台,体积小、重量轻,承载负荷可达到2.5kg,耗电只有交流电动云台的四分之一,并且在无蜗轮蜗杆减速装置时,利用电阻尼原理能够对存在惯性的直流云台实现瞬间制动。文中给出了这种直流电动云台的无触点驱动电路。
In the security TV monitoring system, some occasions need to put the camera on the electric camera platform, led by the electric camera platform for the camera up and down and left and right turn to expand the camera’s viewing angle. With the development of microelectronics technology, the size of the video camera is getting smaller and smaller. Therefore, most of the AC powered PTZs that have been used before are not used any more than the special occasions. I use the recorder of the 9V or 12V DC motor, remove the internal speed control circuit design and manufacture of DC electric PTZ, small size, light weight, load carrying capacity up to 2.5kg, power consumption is only one-fourth of the AC electric PTZ , And in the absence of worm gear reducer, the use of electrical damping principle of inertial DC PTZ to achieve instantaneous braking. This paper gives the DC PTZ driver circuit.