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目前,许多单位宿舍楼楼层很多,电工师傅们仍是把相邻的两层楼作出一个独立的控制电路,去控制这两层楼中间的那盏灯。照这种安装方法,如果有一人从一楼上到十楼,他必须在上楼过程中板动18次开关,这很不方便。对于任意层楼,我们能不能在每层楼道口各安装一只开关,随意控制楼道里的全部电灯呢?换句话说,从某层楼到达任意的另一层楼,只需板动两次开关,一次使灯亮,一次使灯熄灭呢?如图1、2、3就是以五层楼为例,示出了这种设想的思路过程。
At present, many unit dormitory buildings have many floors. The electricians and masters still make an independent control circuit for the two adjacent floors to control the lights in the middle of the two floors. According to this installation method, if there is a person from the first floor to the tenth floor, he must switch 18 times during the upstairs, which is inconvenient. For any floor, can we install a switch at each floor to freely control all the lights in the corridor? In other words, from a certain floor to any other floor, we only need to move twice. Switch, once the light is turned on, once the light goes out? As shown in Figure 1, 2, 3 is a five-story building, for example, shows the idea of this idea process.