Dual-lens smoke detection system

1 . An apparatus for smoke detection at a beam receiver, comprising:

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 apparatus 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.

2 . The apparatus of claim 1 , further comprising one or more light-emitting diodes (LEDs) configured to indicate a status of the beam receiver.

3 . The apparatus of claim 2 , wherein the status of the beam receiver includes one or more of a trouble alarm, a fire alarm, a programming mode, a search mode, or a lock between the first receive element and a first beam transmitter.

4 . The apparatus of claim 1 , further comprising a housing configured to contain the plurality of receive elements, the one or more memories, and the one or more processors.

5 . The apparatus of claim 4 , further comprising:

a humidity sensor configured to sense ambient humidity outside of the housing; and

a heating element configured to generate heat internal to the housing.

6 . The apparatus of claim 5 , wherein the one or more processors are further configured to:

receive, from the humidity sensor, an indication of the ambient humidity outside of the housing;

activate the heating element if the ambient humidity satisfies a humidity threshold condition; and

deactivate or refrain from activating the heating element if the ambient humidity does not satisfy the humidity threshold condition.

7 . The apparatus of claim 1 , further comprising a laser transmitter configured to align the first receive element with a first beam transmitter.

8 . The apparatus of claim 1 , further comprising a laser receiver configured to receive, from a first beam transmitter, a laser beam indicative of a direction of the first beam pair.

9 . The apparatus of claim 1 , further comprising a power over ethernet (PoE) interface configured to receive power and communicate with an external control system.

10 . The apparatus of claim 1 , wherein each of the plurality of receive elements is implemented as a complementary metal-oxide semiconductor (CMOS) sensor or a charge-coupled device (CCD) sensor.

11 . The apparatus of claim 1 , wherein the first beam is an ultra-violet (UV) light beam, and wherein the second beam is an infrared (IR) beam.

12 . 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.

13 . The method of claim 12 , further comprising:

receiving, via a humidity sensor, an indication of an ambient humidity outside of the beam receiver;

activating a heating element if the ambient humidity satisfies a humidity threshold condition; and

deactivating or refraining from activating the heating element if the ambient humidity does not satisfy the humidity threshold condition.

14 . 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.

15 . The smoke detection system of claim 14 , further comprising one or more light-emitting diodes (LEDs) configured to indicate a status of the beam receiver.

16 . The smoke detection system of claim 15 , wherein the status of the beam receiver includes one or more of a trouble alarm, a fire alarm, a programming mode, a search mode, or a lock between the first receive element and a first beam transmitter.

17 . The smoke detection system of claim 14 , further comprising a housing configured to contain the plurality of receive elements, the one or more memories, and the one or more processors.

18 . The smoke detection system of claim 17 , further comprising:

a humidity sensor configured to sense ambient humidity outside of the housing; and

a heating element configured to generate heat internal to the housing.

19 . The smoke detection system of claim 14 , further comprising a laser transmitter configured to align the first receive element with a first beam transmitter.

20 . The smoke detection system of claim 14 , further comprising a laser receiver configured to receive, from a first beam transmitter, a laser beam indicative of a direction of the first beam pair.