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...

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Bibliographic Details
Main Authors KAWAHARA ATSUSHI, WATANABE HIROMI, IWATA MASAO, TAKANO TOSHIYUKI
Format Patent
LanguageEnglish
Published 28.08.2008
Subjects
ANTENNAS, i.e. RADIO AERIALS
BASIC ELECTRIC ELEMENTS
ELECTRICITY
INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT
MEASURING
MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION,OR SHOCK
PHYSICS
TESTING
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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