Method and device for self-regulation of locking force of dome camera
A self-adjusting, dome camera technology, applied in image communication, color TV parts, TV system parts, etc., can solve problems such as increased power consumption, impact on motor life, increased power consumption, etc., to achieve optimal power consumption , prolong service life and increase reliability
Active Publication Date: 2014-01-29
ZHEJIANG UNIVIEW TECH CO LTD
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But this will bring a series of negative effects: 1. Increased power consumption: at this time, the power consumption is relatively large, which is not conducive to environmental protection
2. Affect the service life of the stepper motor: because the life of the stepper motor is closely related to the temperature rise
Excessive temperature has a serious impact on the life of the motor
3. The problem of heat dissipation is prominent: due to the increase of "full current lock" power consumption, the heat dissipation also increases. If the heat dissipation cannot be handled well at this time, it will also affect the service life of the single board components
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[0015] The invention mainly perceives the change of the external environment through the vector sensor, and feeds back the change result to the control unit, so as to control the stepper motor drive unit to self-adaptively adjust the magnitude of the locking current. While solving the out-of-step phenomenon caused by vibration, this solution rationally optimizes power consumption and is environmentally friendly; prolongs the service life of stepping motors and other components; increases the reliability of the dome machine. The technology of the present invention will be described in detail below in conjunction with specific embodiments.
[0016] In this embodiment, a vector sensor is introduced, and the vector sensor senses the vibration of the outside world in real time so as to realize the adjustment of the locking current of the stepping motor. The vector sensor in this embodiment is a three-axis accelerometer. As we all know, there are many types of vector sensors, inclu...
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The invention provides a method for self-regulation of the locking force of a dome camera. The dome camera comprises a vector sensor. The method includes the following steps that A, the current vibration acceleration of the dome camera sensed by the vector sensor is acquired; B, whether the current locking force moment needs to be regulated or not is judged according to the current vibration acceleration in combination with the vibration acceleration stored in a nonvolatile memory in advance and a locking force moment mapping table, if yes, a driving unit of a stepping motor is controlled to regulate the magnitude of a locking current so as to regulate the magnitude of the locking force moment of the stepping motor, and if not, the regulation is not performed. Due to the scheme, while the step falling out problem caused by vibration of the dome camera is solved, power consumption is optimized reasonably, and environment friendliness is achieved; the service life of the stepping motor and the service life of other components are prolonged; the dome camera is made to be more reliable.
Description
technical field [0001] The invention relates to the technical field of dome cameras, in particular to a method and device for self-adjusting the locking force of a dome camera. Background technique [0002] Nowadays, dome cameras (hereinafter referred to as dome cameras) are widely used in the monitoring of large-area and moving targets in all walks of life. Dome cameras can be installed in a variety of ways, including wall-mounted, pole-mounted, corner-mounted, pole-mounted, and even dome cameras suspended on cableways. In some complex installation environments, it is extremely difficult to fix the dome camera, and it is easily affected by external stress and cause the dome camera to vibrate. When the dome camera is monitoring at a certain watch position, the pan / tilt is controlled to "half-flow lock", that is, the locking force is not very strong. When the vibration source reaches a certain intensity, the acceleration received by the dome camera is too large and exceeds ...
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IPC IPC(8): H04N5/232
Inventor 李晗宋亚鹏徐燕飞
Owner ZHEJIANG UNIVIEW TECH CO LTD