Tire condition monitoring apparatus
Number of patents in Portfolio can not be more than 2000
United States of America Patent
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Nov 15, 2005
Grant Date -
Nov 14, 2002
app pub date -
Jul 13, 2001
filing date -
May 10, 2001
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A transmitter, which is operated by a battery, wirelessly transmits data including data that represents the temperature T in a tire and data that represents the voltage V of the battery. A receiver judges whether or not the life of the battery is ending depending on the battery voltage V read from the received data. More specifically, the receiver performs the judgment regarding the life of the battery based on a comparison between the battery voltage V and a variable voltage reference value V0, which is selected in accordance with the temperature T in the tire. The judgment regarding the life of the battery is thus accurately performed.
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