| 计算机视觉镜头的精细调焦控制 |
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| 引用本文： | 张玉华,王安敏,王成江.计算机视觉镜头的精细调焦控制[J].微特电机,2002,30(5):25-26. |
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| 作者姓名： | 张玉华 王安敏 王成江 |
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| 作者单位： | 青岛科技大学,山东青岛,266042 |
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| 摘 要： | 在步进电机控制系统中，采用调频调压与恒频脉冲调宽及高低压驱动相结合的连续细分驱动电路方法。LM331F／V变换器件提供细分时的参考电压，由软件控制产生频率信号，采用正弦与线性叠加规律对绕组电流进行了等步距细分，无需I／O扩展，工作可靠，从而很好地满足了系统的要求。
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| 关 键 词： | 计算机视觉镜头 精细调焦控制 步进电机 控制系统 |
| 文章编号： | 1004-7018(2002)05-0025-02 |
| 修稿时间： | 2002年1月9日 |
The Precise Control of Shot Focal Setting in Computer Vision |
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| ZHANG Yu - hua,WANG An - min,WANG Cheng -Jiang.The Precise Control of Shot Focal Setting in Computer Vision[J].Small & Special Electrical Machines,2002,30(5):25-26. |
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| Authors: | ZHANG Yu - hua WANG An - min WANG Cheng -Jiang |
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| Abstract: | The circuit used in stepping motor control system which combines the merit of frequency - voltage conversion with constant frequency PWM and high - low voltage driving are introduced in this paper. In addition, the reference voltage of comparator is composed of F/V conversion chip - LM331 and the frequency signals which is produced by single - chip computer is analyzed here. It doesn' t require I/O expend and can subdivides the wind current according to linear plus sine wave. The circuit works reliably and satisfyes the requirements of system well. |
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| Keywords: | precise control of focal setting subdividing driving stepping motor |
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