Detection system with randomized transmissions
First Claim
Patent Images
1. 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.
1 Assignment
0 Petitions
Accused Products
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.
-
Citations
2 Claims
-
1. 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.
-
-
2. 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.
-
Specification