초록 ▼

The Incident Location Reporting Security System pertains to a device that is capable of determining instantaneously, via the use of pulse-width coded modulation, the location of incidences such as burglary, robbery and fire. Detailed multi-point monitoring can be carried out in such varied sites in

The Incident Location Reporting Security System pertains to a device that is capable of determining instantaneously, via the use of pulse-width coded modulation, the location of incidences such as burglary, robbery and fire. Detailed multi-point monitoring can be carried out in such varied sites in a multistory buildings, residential neighborhoods, museums or individuals. The concept allows for generation and reading of billions of different codes through the simplistic design of a coded receiver wherein codes are read instead of matched. In achieving this capability, a base number is created by multiplying the plurality of positions of a switch times the number of switches and thereafter pulsing a transmitter a number of times to generate a code in which the base number is raised to the power of the number of times it is pulsed. Each transmitter is assigned a specific coded number and a single receiver rapidly processes and identifies any coded number received. In order to identify the position of an individual immediately at the time an alarm is sounded, triangulation is used.

대표청구항 ▼

A communications system including a central receiver and a plurality of transmitters wherein each transmitter transmits to the central receiver, the system comprising: means in each transmitter for generating a modulated code particular to that transmitter, the code generating means including: code

A communications system including a central receiver and a plurality of transmitters wherein each transmitter transmits to the central receiver, the system comprising: means in each transmitter for generating a modulated code particular to that transmitter, the code generating means including: code determining means having a plurality circuit elements, each circuit element having a plurality of different pulse-width modes, means for setting each element in one of the modes to provide each transmitter with a unique code, wherein the number of codes available to the transmitter is determined by the number of modes raised to the power of the number of circuit elements; means in each transmitter for generating a carrier signal for transmitting the modulated code of that transmitter to the receiver as a coded train; means in the central receiver responsive to the carrier signal; and means in the central receiver for reading the code of a transmitter carried by the carrier signal upon receipt thereof by the receiver to identify the particular transmitter transmitting the code.