Tire pressure detection side receiving circuit and tire monitor system provided therewith

A tire pressure detection side receiving circuit (80) includes an antenna resonance circuit (81) having an antenna (40), a capacitor (C1 to C4) and a coil (L1), a capacitance changing circuit (82) for changing a capacitance of the capacitor, an oscillation circuit (85) capable of imparting a test wa...

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1. Verfasser:	KATOU, MICHIYA
Format:	Patent
Sprache:	eng ; fre ; ger
Schlagworte:	DEVICES OR ARRANGEMENTS RELATED TO TYRES PERFORMING OPERATIONS REPAIRING, OR CONNECTING VALVES TO, INFLATABLE ELASTIC BODIESIN GENERAL TRANSPORTING TYRE CHANGING OR REPAIRING TYRE INFLATION VEHICLE TYRES VEHICLES IN GENERAL
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creator	KATOU, MICHIYA
description	A tire pressure detection side receiving circuit (80) includes an antenna resonance circuit (81) having an antenna (40), a capacitor (C1 to C4) and a coil (L1), a capacitance changing circuit (82) for changing a capacitance of the capacitor, an oscillation circuit (85) capable of imparting a test wave to the antenna resonance circuit (81), a resonance level detector (83) capable of detecting a resonance level of the antenna resonance circuit (81), a memory (34) storing preset reference frequency, a resonance frequency detector (S2, 31) changing a frequency of the test wave to be imparted to the antenna resonance circuit (81) while the capacitor (C1 to C4) of the antenna resonance circuit (81) is maintained at a constant capacitance, thereby detecting as a measured resonance frequency a frequency in a case where an amplitude level of the test wave has reached a peak, and a tuning control (S3, 31) controlling the capacitance changing circuit (82) and changing the capacitor capacitance so that the measured resonance frequency is approximated to a reference frequency.
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language	eng ; fre ; ger
recordid	cdi_epo_espacenet_EP1849628A3
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subjects	DEVICES OR ARRANGEMENTS RELATED TO TYRES PERFORMING OPERATIONS REPAIRING, OR CONNECTING VALVES TO, INFLATABLE ELASTIC BODIESIN GENERAL TRANSPORTING TYRE CHANGING OR REPAIRING TYRE INFLATION VEHICLE TYRES VEHICLES IN GENERAL
title	Tire pressure detection side receiving circuit and tire monitor system provided therewith
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