发明名称 BICYCLE SPEEDOMETER
摘要 PURPOSE:To provide a speedometer for bicycles which can correctly measure a running speed without requiring any special sensor. CONSTITUTION:In the speedometer for bicycles which is constituted so as to digitally display a running speed of a bicycle, a waveform of an alternating current output from a hub dynamo 1 for lighting a lamp 10 fixed to the bicycle is converted into a pulse wave by a protecting circuit 12 and a waveform- forming circuit 13. A running speed of the bicycle is measured by a microcomputer 14 based on an interval of the pulse waves and a peripheral length of a wheel stored in an internal RAM beforehand.
申请公布号 JPH07229909(A) 申请公布日期 1995.08.29
申请号 JP19940020052 申请日期 1994.02.17
申请人 SANYO ELECTRIC CO LTD 发明人 TOMITA TATSUHIKO
分类号 G01P1/08;B62J99/00;(IPC1-7):G01P1/08;B62J39/00 主分类号 G01P1/08
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