| 摘要 |
PURPOSE: A BCD(Binary Code Decimal system) code detection method for a decimal counter is provided to perform an automatic control and measurement by using enable an analogue instrument in order to exchange data to the external by detecting the tooth of decimal counter as a binary code. CONSTITUTION: The BCD code as a number indicated through a hole of a gear is detected by making a hole on the gear surface of decimal instrument according to an arrangement of the BCD code and by a combination of single electrode pickup coil. The BCD code is detected by attaching an iron piece or magnetic influencing on a frequency of resonance pickup coil and circuit to the gear surface and detecting the change of resonance frequency according to the inductance change of a terminal. The BCD code also is detected by detecting the BCD code hole with a two sensor of both sides of gear. The BCD code hole is placed on the inner side of tooth base of decimal counter and arranged by a regular spacing and the spacing of 36 angular degrees.
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