Two Fault Tolerant Transmitter Activator.
DEPARTMENT OF THE AIR FORCE WASHINGTON DC
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The present invention relates to control apparatus for remotely activating the transmitter of an impact sensor system. More particularly, it concerns circuitry which prevents inadvertent emissions from a remotely activated transmitter until it has been commanded into two successive operative modes and has also received two reset commands. Signal transmissions systems are often used in remote locations to monitor variuos phenmena occurring in the vicinity of the system, such as motion, temperature and pressure changes and the like. One such application concerns the monitoring of a sensor adapted to detect stresses, strains and impacts upon a satellite carried into space and launched into orbit by a manned spacecraft, such as the space shuttle. It is important for safety reasons that the transmitter associated with such an impact sensor system not be inadvertently activated while traveling as cargo in the space shuttle.
- Non-Radio Communications