US Patent No. 10,405,401

PRECIPITATION SENSING LUMINAIRE


Patent No. 10,405,401
Issue Date September 03, 2019
Title Precipitation Sensing Luminaire
Inventorship Ruben Rajagopalan, Neuss (DE)
Assignee SIGNIFY HOLDING B.V., Eindhoven (NL)

Claim of US Patent No. 10,405,401

1. A luminaire comprising:at least one light source arranged to emit light to illuminate an outdoor environment of the luminaire;
at least one sensor, each of the at least one sensor integrated into the luminaire and arranged to provide a respective sensor output signal;
a control module arranged to receive the respective sensor output signal from each of the at least one sensor and configured to communicate with a component of the luminaire based on the respective sensor output signal, wherein the at least one sensor comprises an accelerometer and the respective sensor output signal that is output by the accelerometer is an accelerometer output signal;
a memory storing reference precipitation information, wherein the reference precipitation information comprises a correlation of a plurality of precipitation types with a plurality of frequencies from accelerometer detection signals; and
a precipitation detection module configured to receive the respective sensor output signal from each of the at least one sensor,
wherein the precipitation detection module is configured to convert the accelerometer output signal into a frequency domain waveform and compare the frequency domain waveform to the reference precipitation information,
wherein the precipitation detection module is configured to detect precipitation in the outdoor environment based on said comparison,
wherein the precipitation detection module is configured to control the light emitted from the at least one light source based on said detection.