Multispectral sensor based alert condition detector

1. An optical detector device, comprising:

one or more memories; and

one or more processors, communicatively coupled to the one or more memories, to:

receive a spectroscopic measurement from a multispectral sensor, wherein the spectroscopic measurement is performed at a fixed angle across a range of wavelengths;

determine, based on the spectroscopic measurement, a particulate size of a particulate;

determine, based on the spectroscopic measurement, an identification of the particulate;

determine, based on the particulate size and the identification of the particulate, that the particulate is a smoke-based particulate;

determine that an alert condition is satisfied based on the smoke-based particulate being a first type of smoke-based particulate that satisfies the alert condition, the first type of smoke-based particulate being different from a second type of smoke-based particulate that does not satisfy the alert condition; and

trigger an alert based on determining that the alert condition is satisfied.

2. The optical detector device of claim 1 , wherein the one or more processors are further to:

determine one or more other particulate sizes of one or more other particulates; and

determine one or more other identifications of the one or more other particulates; and

wherein the alert condition is determined to be satisfied further based on the one or more other particulate sizes and the one or more other identifications of the one or more other particulates.

3. The optical detector device of claim 1 , wherein the one or more processors are further to:

transmit an instruction to cause a beam to be provided with the range of wavelengths; and

wherein the one or more processors, when receiving the spectroscopic measurement, are to:

receive the spectroscopic measurement as a response to transmitting the instruction.

4. The optical detector device of claim 1 , wherein the one or more processors, when determining the identification of the particulate, are to:

determine, using a spectroscopic classification model, a classification of a spectrum of the particulate based on the spectroscopic measurement; and

determine the identification of the particulate based on the classification of the spectrum of the particulate.

5. The optical detector device of claim 1 , wherein the one or more processors, when determining that the alert condition is satisfied, are to:

determine, based on determining that the particulate is the smoke-based particulate, that a fire is occurring within a proximity of the multispectral sensor.

6. The optical detector device of claim 5 , wherein the one or more processors are further to:

determine, based on the spectroscopic measurement, a chemometric signature of the fire based on determining that the fire is occurring within the proximity of the multispectral sensor; and

wherein the one or more processors, when triggering the alert, are to:

provide information identifying the chemometric signature.

7. The optical detector device of claim 1 , wherein the one or more processors, when triggering the alert, are to:

trigger an audible or visual alert to indicate the alert condition.

8. The optical detector device of claim 1 , wherein the one or more processors, when triggering the alert, are to:

communicate with an emergency responder device to indicate the alert condition.

9. A fixed angle multispectral sensor device, comprising:

an optical transmitter to transmit a beam with a range of wavelengths;

a multispectral filter or lens to direct a reflection of the beam into a plurality of channels;

an optical receiver including a sensor element array to receive the reflection of the beam via the plurality of channels and to perform a spectroscopic measurement;

one or more processors to:

determine, based on the spectroscopic measurement, a particulate size of a particulate;

determine, based on the particulate size, that the particulate is a smoke-based particulate;

determine that an alert condition is satisfied based on the smoke-based particulate being a first type of smoke-based particulate that satisfies the alert condition, the first type of smoke-based particulate being different from a second type of smoke-based particulate that does not satisfy the alert condition; and

trigger a response action based on determining that the alert condition is satisfied.

10. The fixed angle multispectral sensor device of claim 9 , wherein the range of wavelengths is from 190 nanometers (nm) to 1100 nm.

11. The fixed angle multispectral sensor device of claim 9 , wherein the optical transmitter includes a first light emitter to transmit a first portion of the beam with a first portion of the range of wavelengths and a second light emitter to transmit a second portion of the beam with a second portion of the range of wavelengths.

12. The fixed angle multispectral sensor device of claim 9 , wherein the sensor element array includes a first one or more sensor elements to receive a first portion of the reflection of the beam with a first portion of the range of wavelengths and a second one or more sensor elements to receive a second portion of the reflection of the beam with a second portion of the range of wavelengths.

13. The fixed angle multispectral sensor device of claim 9 , wherein the optical transmitter is configured to transmit the beam, through a medium, toward particulates in the medium, and

wherein the medium is a gaseous medium or a liquid medium.

14. The fixed angle multispectral sensor device of claim 9 , further comprising:

a housing with an opening,

a particulate inflow device to draw fluid from a first environment external to the housing to a second environment internal to the housing via the opening,

wherein the optical transmitter is configured to transmit the beam and the optical receiver is configured to receive the reflection of the beam within the second environment internal to the housing.

15. The fixed angle multispectral sensor device of claim 9 , wherein a sensitivity of the optical receiver is for particulates with a concentration of less than a threshold.

16. A method, comprising:

receiving, by an optical detector device, a spectroscopic measurement from a multispectral sensor, wherein the spectroscopic measurement is performed at a fixed angle across a range of wavelengths;

determining, by the optical detector device and based on the spectroscopic measurement, a particulate size of a particulate;

determining, by the optical detector device and based on the spectroscopic measurement, an identification of the particulate;

determining, by the optical detector device and based on the particulate size and the identification of the particulate, that the particulate is a smoke-based particulate;

determining, by the optical detector device and that an alert condition is satisfied based on the smoke-based particulate being a first type of smoke-based particulate that satisfies the alert condition, the first type of smoke-based particulate being different from a second type of smoke-based particulate that does not satisfy the alert; and

performing, by the optical detector device, an alert action to indicate the alert condition.

17. The method of claim 16 , wherein performing the alert action comprises: providing an alert regarding a fire.

18. The method of claim 16 , further comprising:

transmitting an instruction to cause a beam to be provided with the range of wavelengths,

wherein receiving the spectroscopic measurement comprises:

receiving the spectroscopic measurement as a response to transmitting the instruction.

19. The method of claim 16 , wherein determining the identification of the particulate comprises:

determining, using a spectroscopic classification model, a classification of a spectrum of the particulate based on the spectroscopic measurement; and

determining the identification of the particulate based on the classification of the spectrum of the particulate.

20. The method of claim 16 , wherein determining that the alert condition is satisfied comprises:

determining, based on determining that the particulate is the smoke-based particulate, that a fire is occurring within a proximity of the multispectral sensor.