摘要:
A non-contact type potentiometer with high resolution of rotation amount detection applicable to endlessly multiple rotations. The potentiometer has an endlessly rotatable first shaft, a first detection unit that magnetically detects a rotation angle of the first shaft in a non-contact manner, an endlessly rotatable second shaft, a second detection unit that magnetically detects a rotation angle of the second shaft in a non-contact manner, a transmission unit that decreases the speed of the rotation of the first shaft and transmits the rotation to the second shaft, and an output unit that outputs an electric signal proportional to a rotation amount of the first shaft based on detection signals from the first detection unit and the second detection unit.
摘要:
Noise control systems and methods for brakes and clutches are disclosed, in which voltage profiles comprise at least one or two step profiles and at least one ramp profile. The voltage profiles are selectively applied to at least one of a stationary member or rotary member of the brake or clutch in order to decrease noise during operation thereof. Such systems and methods can be adapted for use in medical imaging equipment, particularly to decrease the noise of brakes and clutches commonly associated therewith.
摘要:
An embodiment of an integrated circuit device may comprise an integrated circuit package, a sensor element attached within the integrated circuit package, a capacitance sensor coupled with the sensor element and situated within the integrated circuit package, wherein the capacitance sensor is configured to measure a capacitance of the sensor element, and an output pin positioned at the exterior of the integrated circuit package, wherein the output pin is configured to carry a signal based on the measured capacitance of the sensor element.
摘要:
In an embodiment, a safe motion enabling method for a positioner e.g. a vascular positioner in a medical imaging apparatus, includes the actions of (i) holding a positioner at a predetermined stationary position against influence of gravity, (ii) operating a drive motor for the positioner at predetermined low speed; (iii) measuring current drawn by the drive motor and (iv) releasing the positioner in response to the magnitude of the current drawn by the drive motor.
摘要:
An embodiment of an integrated circuit device may comprise an integrated circuit package, a sensor element attached within the integrated circuit package, a capacitance sensor coupled with the sensor element and situated within the integrated circuit package, wherein the capacitance sensor is configured to measure a capacitance of the sensor element, and an output pin positioned at the exterior of the integrated circuit package, wherein the output pin is configured to carry a signal based on the measured capacitance of the sensor element.
摘要:
In some embodiments, a braking system for a positioner in a medical imaging apparatus comprises a brake coil coupled to a power supply, a first control circuit coupled to a top side of the brake coil, a second control circuit coupled to a bottom side of the brake coil, and a current sensor coupled to at least one of the first control circuit and the second control circuit.
摘要:
A method and system for reducing or eliminating uncontrolled motion in a motion control system is disclosed herein. The method includes defining at least one closed motion control loop. The motion control loop comprises a plurality of feedback control loops. The method further includes detecting a faulty feedback control loop from among the plurality of feedback control loops based on a faulty feedback signal. Once the faulty feedback signal is detected, the faulty feedback signal in the faulty feedback control loop is swapped to an operative feedback signal while the motion control loop is active. In an embodiment the motion control loop includes a velocity feedback control loop and a position feedback control loop.
摘要:
In an embodiment, a tilt calibration system for a medical imaging apparatus having a positioner axis, comprises at least one first sensor (e.g. an accelerometer), configured to determine the position of the positioner axis relative to ground, and at least one second sensor (e.g. an encoder), configured to output tilt position feedback of the positioner axis, and a processor is configured to determine a home offset in response to the position of the positioner axis relative to ground, and the tilt position feedback.
摘要:
In some embodiments, a braking system for a positioner in a medical imaging apparatus comprises a brake coil coupled to a power supply, a first control circuit coupled to a top side of the brake coil, a second control circuit coupled to a bottom side of the brake coil, and a current sensor coupled to at least one of the first control circuit and the second control circuit.
摘要:
A non-contact type potentiometer with high resolution of rotation amount detection applicable to endlessly multiple rotations. The potentiometer has an endlessly rotatable first shaft, a first detection unit that magnetically detects a rotation angle of the first shaft in a non-contact manner, an endlessly rotatable second shaft, a second detection unit that magnetically detects a rotation angle of the second shaft in a non-contact manner, a transmission unit that decreases the speed of the rotation of the first shaft and transmits the rotation to the second shaft, and an output unit that outputs an electric signal proportional to a rotation amount of the first shaft based on detection signals from the first detection unit and the second detection unit.