| 1 | Second, based on reading radio frequency card module of EM Corporation, the design of a RFID system is given. | |
| 2 | The opposite side of the moving surface is provided with a single absolute type optical rule and two groups of read heads. | |
| 3 | Good question, so there is this little reading head kind of like in an old phonograph player that does move back and forth and in and out depending on the implementation. | |
| 4 | The direction and magnitude also can be solved by four reading heads, so the influence of rotating shaft can be eliminated. | |
| 5 | 为了消除光栅编码器偏心与振动对测量的影响，在双读头法的基础上，提出了四读头法消除光栅编码器偏心和振动影响的方法，并进行了理论推导和仿真。 A new method to eliminate the influence of eccentricity and vibration with four reading heads is proposed and the theoretical derivation and simulation results are given out. |
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