Patent ID: 11867799
Assignee: CARRIER FIRE & SECURITY EMEA BV
Field: Measurement (Instruments)
Classification: CPC G | IPC G

Claim 12:
13. A security system comprising a radar sensor for determining a range of a sensed moving object or person, the radar sensor comprising:
a transmitting antenna, configured to transmit a plurality of radar pulses;
a receiving antenna, configured to receive a corresponding plurality of pulses;
an oscillator;
a mixer;
a pulse modulator; and
a controller;
wherein the radar sensor is configured to transmit a plurality of radar pulses and, when the object or person is present to reflect the radar pulses, receive a corresponding plurality of pulses, the transmitting and receiving comprising:
transmitting a first radar pulse having a first defined pulse duration;
receiving a first reflected radar pulse, wherein the first reflected radar pulse is at least a portion of the first radar pulse that has reflected off of the object or person;
determining whether there is a first pulse overlap between the first radar pulse and the first reflected radar pulse;
selecting a second defined pulse duration for a second radar pulse based on the determination of the first pulse overlap;
transmitting the second radar pulse having the second pulse duration;
receiving a second reflected radar pulse, wherein the second reflected radar pulse is at least a portion of the second radar pulse that has reflected off of the object or person; and
determining whether there is a second pulse overlap between the second radar pulse and the second reflected radar pulse; and
wherein the radar sensor is configured to determine a range in which the object or person is located based on the determinations of the first pulse overlap and the second pulse overlap.