Data transmission process within a data processing system suitable for use in motor vehicles
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United States of America Patent
Stats
-
Jan 27, 1998
Grant Date -
N/A
app pub date -
Jul 19, 1995
filing date -
Jul 21, 1994
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
A trigger circuit for occupant protection systems in motor vehicles comprises a control unit which will effect the triggering of a means of restraint such as an airbag, depending on sensor signals generated by one or more external sensor units. To achieve a degree of triggering certainty, data interrogation must take place in very short time intervals. A safe transmission of data between the control unit and the sensor units will be ensured if, in accordance with this invention, the information units to be transmitted will each be encoded by means of a PWM signal with a certain period duration. The control unit will check the period duration of the PWM signal received, and, in the event of this actual period duration not matching the specified nominal value, it will not accept the relevant unit of information.
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