Dual-lens smoke detection system

A method of smoke detection at a beam receiver, comprising:

• receiving a plurality of beam pairs including a first beam pair, wherein each beam pair is received via one of a plurality of receive elements, and wherein the first beam pair is received via a first receive element and comprises a first beam and a second beam;
• measuring, at a first time instance and at a second time instance, a first beam intensity of the first beam as received by the first receive element, and a second beam intensity as received by the first receive element, wherein the second time instance occurs a preconfigured amount of time after the first time instance;
• comparing a first delta between the first beam intensity and the second beam intensity at the first time instance with a second delta between the first beam intensity and the second beam intensity at the second time instance;
• if (i) a difference between the first delta and the second delta satisfies a threshold condition, and (ii) the first beam intensity and the second beam intensity at the first time instance is greater than the first beam intensity and the second beam intensity at the second time instance, generate an alarm signal;
• and
• if the difference between the first delta and the second delta does not satisfy the threshold condition, refrain from generating the alarm signal.

A smoke detection system including a beam receiver and one or more beam transmitters, wherein the beam receiver comprises:

• one or more memories, individually or in combination, having instructions;
• and
• one or more processors, individually or in combination, configured to execute the instructions and cause the beam receiver to:
• receive a plurality of beam pairs including a first beam pair, wherein each beam pair is received via one of a plurality of receive elements, and wherein the first beam pair is received via a first receive element and comprises a first beam and a second beam;
• measure, at a first time instance and at a second time instance, a first beam intensity of the first beam as received by the first receive element, and a second beam intensity as received by the first receive element, wherein the second time instance occurs a preconfigured amount of time after the first time instance;
• compare a first delta between the first beam intensity and the second beam intensity at the first time instance with a second delta between the first beam intensity and the second beam intensity at the second time instance;
• if (i) a difference between the first delta and the second delta satisfies a threshold condition, and (ii) the first beam intensity and the second beam intensity at the first time instance is greater than the first beam intensity and the second beam intensity at the second time instance, generate an alarm signal;
• and
• if the difference between the first delta and the second delta does not satisfy the threshold condition, refrain from generating the alarm signal;
• and each of the one or more beam transmitters comprises:
• one or more memories, individually or in combination, having instructions;
• and
• one or more processors, individually or in combination, configured to execute the instructions and cause each of the one or more beam transmitters to:
• radiate, via a first emitter the first beam;
• and
• radiate, via a second emitter, the second beam, wherein the first beam and the second beam are both radiated in a first direction toward the beam receiver.