ANTENNA DEVICE FOR ENGINE TACHOMETER
PROBLEM TO BE SOLVED: To supply a tachometer body with high-level pulses having engine speed information on a prescribed level by eliminating variations in reception sensitivity depending on the cable length while preventing the entry of external noise. SOLUTION: This antenna device is provided with...
Saved in:
Main Authors | , , , |
---|---|
Format | Patent |
Language | English |
Published |
28.08.2008
|
Subjects | |
Online Access | Get full text |
Cover
Loading…
Summary: | PROBLEM TO BE SOLVED: To supply a tachometer body with high-level pulses having engine speed information on a prescribed level by eliminating variations in reception sensitivity depending on the cable length while preventing the entry of external noise. SOLUTION: This antenna device is provided with: a wave receiving plate 11 for receiving an electromagnetic wave arising from an engine ignition system; a pulse input circuit part 21 for guiding the electromagnetic wave received by the receiving plate 11 to an induction coil 14 to take it therein as a pulse component of a prescribed frequency and level; and a waveform shaping circuit part 22 for waveform-shaping the pulse taken in the circuit part 21 to output it to the tachometer body via a cable 1 and a plug 3. COPYRIGHT: (C)2008,JPO&INPIT |
---|---|
Bibliography: | Application Number: JP20070034314 |