1、 I 摘 要 电磁式交互电子白板的板体沿X、Y轴铺设了感应线圈。信号笔前端有电 感线圈，使用时CPU向板体的感应线圈先发射一段时间与笔中电感线圈谐振 频率相同的电磁波，使笔中的电感电容谐振起来，然后停止发送，板体的感 应线圈切换到接收状态，这时，笔里的电感电容失去外在的推动力，笔中的 谐振波将会产生衰减震荡，同时用板体的感应线圈接收笔所发射的衰减电磁 波，由于电磁耦合，就会在板体的感应线圈上产生感应电动势。这样就在白 板上显示笔所走过的路线，将白板的感应线圈分组分区域，将所得的笔的轨 迹图传给检测电路进行检测，设计就是根据这个原理来进行检测白板系统是 否运作正常及坏点位置的检测。 采用三维雕刻
2、机的结构为原型进行改装， 去掉主轴电机及刀具设备， 由三 个步进电机控制滚珠丝杠进给，滚珠丝杠与滑块相连接，Z方向移动部件固 定在X轴的滑块上，而X轴方向的导轨又固定在Y轴的滑块上，实现三个坐标 轴的同步运行。 关键词：电磁式交互电子白板；感应线圈；信号笔；雕刻机。 II Abstract Electromagnetic type interactive electronic whiteboard along the X, Y axis laid induction coil. A signal pen in front of inductance coil, when using CPU t
3、o the plate body induction coil launch for a period of time and in the same pen inductance coil resonant frequency of electromagnetic wave, so that the pen in the inductor capacitor resonant, then stop sending, the board body induction coil switch to the receiving state, then, the inductance capacit
4、ance lost pen the external driving force, in the pen Xie Zhenbo will produce the damping vibration, at the same time with the plate body induction coil receives the sum of the emitted the attenuation of electromagnetic wave, due to electromagnetic coupling, will in the plate body on the induction co
5、il generates induced electromotive force. This is displayed on the whiteboard pen whiteboard traveled route, the induction coil group area, the pen trajectory plan to pass to the detection circuit to be tested, is designed according to this principle to detect the whiteboard system is functioning pr
6、operly and dead position detection. Using three dimensional engraving machine structure for prototypes were modified, removed from the spindle motor and cutter device, composed of three stepper motor control of ball feed screw, a ball screw is connected with a slide block, Z direction component is fixed in the X axis and X axis direction of the slide block, the guide rail is fixed on the Y axis on the slider, implementation three axes simultaneous operation. Keywords: Electromagnetic interactiv
