Valdimir ZEMANEK,Bernd GERSTLAUER,Thomas ZEHETMAIER,Ruben VON STEIN,Florian VON STEIN
申请号：
US15562010
公开号：
US20180085075A1
申请日:
2016.03.23
申请国别(地区):
US
年份:
2018
代理人:
摘要：
An X-ray system includes a first structure on which an X-ray source and/or an X-ray detector is provided, a second structure, a stepper motor that moves the first structure relative to the second structure, an incremental rotary encoder, and a control unit. The stepper motor includes a rotor shaft coupled with the first structure such that when a user exerts an external force on the first structure, an angular position of the rotor shaft is changed in accordance with the exerted external force. The incremental rotary encoder is coupled with the rotor shaft of the stepper motor and generates an encoder signal in accordance with the change of the angular position of the rotor shaft. The control unit determines, based on the encoder signal, a position deviation signal characterizing a deviation of the angular position of the rotor shaft from a reference angular position of the rotor shaft and controls the stepper motor to rotate the rotor shaft dependent on the position deviation signal such that the stepper motor supports a movement of the first structure relative to the second structure in accordance with the exerted external force.
