System and method for the wireless signal transmission between a measuring head and a remote receiver
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United States of America Patent
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Sep 7, 1999
Grant Date -
N/A
app pub date -
Oct 23, 1997
filing date -
May 11, 1995
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A system for transmitting a radio-frequency signal from a contact detecting probe (1), powered by a battery (4), to a remote interface (11), that includes the transmitting, by way of coded serial signals, of messages containing information regarding the state of the probe, the level of charge of its associated battery, and other possible control and identification information. In order to guarantee the repeatability of the delay time that cannot be avoided in the transmission of the change of state of the probe, the bit periods of the single bits that form the message are changed, with respect to a nominal bit period (TN) of the serial signal, on the basis of the delay or the advance at which there occurs the change of state, with respect to a theoretical instant (C0) pre-set within the nominal bit period. Each message comprises a number of bits that represent coded variables, and a start sequence (ST), clearly distinguishable with respect to the coded variables, and enabling the interruption of serial signals the transmission of which is in progress.
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