Detection system with randomized transmissions
AssigneeEmhart Industries, Inc.
InventorsStacy E. Gehman, Kevin T. Ruddell, Brian D. Dawson
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Abstract
A detection system having sending units for sending data signals representative of a condition, such as fire, smoke, intrusion, battery condition, or an emergency, to a central receiving unit. The sending units include a microcomputer which generates a pseudo-random number, waits for a number of cycle periods equal to the pseudo-random number, then activates a transmitter to send a data signal to the receiving unit. The randomized transmission prevents the synchronized clashing of transmitters.
Claims2
A detection system comprising:
- a plurality of sending units, each of said units comprising:
- sensing means for sensing a condition;
- means for generating a pseudo-random number;
- means responsive to said sensing means and said means for generating for sending a data signal representative of said condition at pseudo-randomized time intervals, said means including a means for cycling through a number of timing loops in a microprocessor program equal to said pseudo-random number before outputting said data, and a means for delaying the sending of said data signal for a predetermined time interval in addition to the pseudo-random time interval;
- and
- receiving means for receiving said data signals and producing an output indicative of said condition.
A method of providing an indication of a condition at a remote location comprising:
- sensing said condition;
- generating a pseudo-random number;
- cycling through a timing loop in a microprocessor program a number of times equal to said pseudo-random number;
- waiting for a predetermined time interval;
- sending a data signal representative of said condition;
- and
- receiving said data signal and utilizing it to provide an indication of said condition.
Dependencies are inferred from the claim text.