Inventor
HU ZHAOXIA
CN14 patents
Patents
14 patentsUS10173864B2Jan 8, 2019
System of monitoring handrail for a passenger conveyer device, a passenger conveyer device and monitoring method thereof
OTIS ELEVATOR CO6 citations83
US10479653B2Nov 19, 2019
Monitoring system of a passenger conveyor, a passenger conveyor, and a monitoring method thereof
OTIS ELEVATOR CO4 citations72
US10364130B2Jul 30, 2019
Speed detection system of passenger conveyor and speed detection method thereof
OTIS ELEVATOR CO3 citations72
US10214391B2Feb 26, 2019
System and method for monitoring handrail entrance of passenger conveyor
OTIS ELEVATOR CO4 citations72
US10071884B2Sep 11, 2018
Detection of state of engagement between step and comb plate of passenger conveyor
OTIS ELEVATOR CO4 citations72
US10183843B2Jan 22, 2019
Monitoring of step rollers and maintenance mechanics of passenger conveyors
OTIS ELEVATOR CO2 citations71
US10059569B2Aug 28, 2018
Monitoring system of a passenger conveyor, a passenger conveyor, and a monitoring method thereof
OTIS ELEVATOR CO5 citations71
US11764716B1Sep 19, 2023
Determination of operation mode for AC asynchronous three-phrase motor in escalator system
OTIS ELEVATOR CO0 citations57
US11078050B2Aug 3, 2021
Speed detection device and passenger conveyer device
OTIS ELEVATOR CO0 citations57
US12122640B2Oct 22, 2024
Heating control device and method for escalator system or moving sidewalk system
OTIS ELEVATOR CO0 citations54
US10221046B2Mar 5, 2019
System of monitoring handrail for a passenger conveyer device, a passenger conveyer device and monitoring method thereof
OTIS ELEVATOR CO0 citations51
US9884749B1Feb 6, 2018
Sensor assembly, security system and passenger conveyor
OTIS ELEVATOR CO1 citations48
US11993486B2May 28, 2024
Apparatus and method for controlling passenger transportation device
OTIS ELEVATOR CO0 citations46
US10282847B2May 7, 2019
Monitoring system of a passenger conveyor and monitoring method thereof
OTIS ELEVATOR CO0 citations41