珍珠湾ART

标题: 传感器的位置 [打印本页]

作者: ob 时间: 2005-8-24 04:30
标题: 传感器的位置

假设一张圆盘像唱机上的唱盘那样转动。这张盘一半是黑色，一半是白色。假设你有数量不限的一些颜色传感器。要想确定圆盘转动的方向，你需要在它周围摆多少个颜色传感器﹖它们应该被摆放在什么位置﹖

作者: sean9991 时间: 2005-8-24 18:21
标题: answer

Two sensors are enough. Put them side by side along any track, i.e., any circle on the disk with the disk's center as its center. Say the sensors are A and B clockwise. After both sensors pickup the same color, if A detects the change of color before B does, then the disk rotates clockwise. Otherwise, the disk rotates counter-clockwise.

作者: husonghu 时间: 2005-8-24 18:54
标题: Agree. This is a nice answer.

Agree. This is a nice answer.

作者: ob 时间: 2005-8-25 08:57
标题: A good solution[@};-]

A good solution

作者: 寒潭清 时间: 2005-8-25 09:00
标题: [@};-][@};-][@};-][@};-]

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