US 12,422,116 B2
Hazardous area lighting with emergency power back up and wireless communications
Timothy E. Graff, Arlington Heights, IL (US); and Ravindra Viraj Gurjar, Pune (IN)
Assigned to APPLETON GRP LLC, Rosemont, IL (US)
Appl. No. 18/286,500
Filed by APPLETON GRP LLC, Rosemont, IL (US)
PCT Filed Jun. 6, 2022, PCT No. PCT/US2022/032327
§ 371(c)(1), (2) Date Oct. 11, 2023,
PCT Pub. No. WO2022/260990, PCT Pub. Date Dec. 15, 2022.
Claims priority of application No. 202121025528 (IN), filed on Jun. 8, 2021.
Prior Publication US 2024/0191850 A1, Jun. 13, 2024
Int. Cl. F21S 9/02 (2006.01); G01R 31/392 (2019.01)
CPC F21S 9/024 (2013.01) [G01R 31/392 (2019.01)] 31 Claims
OG exemplary drawing
 
1. A method of monitoring the health of an emergency power source for a luminaire node that is a node of a wireless mesh network utilized by a process control system, the method comprising:
utilizing, by a luminaire node that is a node of a wireless network utilized by a process control system, mains power to (i) route process control messages utilized by the process control system via the wireless network to thereby control an industrial process, and (ii) at least one of energize an illumination source of the luminaire node or maintain communications with another luminaire;
storing, by the luminaire node, energy in an energy storage device configured to, during a loss of mains power, provide power to (i) route process control messages utilized by the process control system via the wireless network to thereby control the industrial process, and (ii) at least one of energize the illumination source of the luminaire node or maintain communications with another luminaire;
monitoring, by the luminaire node, the energy storage device to determine a health status associated with the energy storage device; and
sending, by the luminaire node, via the wireless network, an indication of the health status associated with the energy storage device.