US 11,688,573 B2
Relay safety system and robotic arm controller
Shun-Kai Chang, Taichung (TW); Yi-Hung Chen, Taichung (TW); and Yen-Shun Huang, Taichung (TW)
Assigned to HIWIN TECHNOLOGIES CORP., Taichung (TW)
Filed by HIWIN TECHNOLOGIES CORP., Taichung (TW)
Filed on Sep. 22, 2021, as Appl. No. 17/481,905.
Prior Publication US 2023/0086525 A1, Mar. 23, 2023
Int. Cl. H01H 47/00 (2006.01); G01R 31/327 (2006.01)
CPC H01H 47/002 (2013.01) [G01R 31/3278 (2013.01); H01H 47/001 (2013.01)] 9 Claims
OG exemplary drawing
 
1. A relay safety system, comprising:
a relay;
an emergency stop device adapted to generate an emergency stop signal;
a trigger detection circuit connecting said relay and said emergency stop device and adapted to convert said emergency stop signal into a trigger signal;
a sticking detection circuit connected to said trigger detection circuit and said relay, and adapted to detect a sticking signal generated by said relay, and generate a power-off signal according to said trigger signal and said sticking signal; and
a power-off circuit connected to said emergency stop device, said relay and said sticking detection circuit, and adapted to receive said power-off signal and disconnect the power of said relay according to said power-off signal.