摘要:
A reversing linear drive which comprises a field coil and a magnetic armature that is excited by the magnetic field of the field coil to perform a linear, axially oscillating movement. In order to detect the armature position, the drive is provided with a stripe pattern element with an alternating arrangement of transparent and opaque stripes or of light-reflecting stripes and non-light-reflecting stripes which extends at least across the entire axial armature stroke, and with a light barrier with elements that emit and receive light in a direction perpendicular to the axial direction.
摘要:
A magnetically guided endoscopy capsule is separated from the surface of water with the aim of immersing the capsule completely in water, using the least possible magnetic force. A brief force curve (F_mag(t)) is thereby automatically generated on the capsule by a solenoid system, by one or more force pulses. Assuming that the capsule floats on the water surface at the start of the force curve, a force curve is applied generating an odd number of force pulses having a step profile. Each odd force pulse brings about at least a partial immersion of the endoscopy capsule in the liquid, and each even force pulse bring about at least a partial emersion of the endoscopy capsule out of the liquid.
摘要:
A coil system for the contactless magnetic navigation of a magnetic body in a work space, has a plurality of coils and a current controller for controlling the respective currents in the plurality of coils. In order to navigate the magnetic body to a variably predeterminable position in the work space, the current controller is designed such that the currents in the plurality of coils are such that the magnetic forces generated by the currents and acting upon the magnetic body at multiple positions at the edge of a convex environment around the predetermined position are directed into the environment. The coil system has the advantage that a movement of the magnetic body toward a spatial position is achieved without any mechanical movement of the coil system and without a positioning system for determining the position of the magnetic body. The coil system is utilized particularly in a medical device, wherein a magnetic body in the form of a probe is moved in the body of a patient. In this way, fast navigation of the probe in the patient's body can be achieved without mechanical movements of the patient table or of the coil system.
摘要:
A charging post at a charging station for charging an electric vehicle can be lowered into the ground by a lifting device such that it does not become a physical obstacle or optically impair the environment and is not damaged by external influences.
摘要:
A control/regulation unit and a sensor device in an air-conditioning device enable detecting presence of an analyte in room air to infer the quality of the room air. A light source emits light into the room on a light path that is reflected to a light-sensitive detector. The air-conditioning device is controlled/regulated as a function of an output of the detector. If the analyte is situated on the light path, the light is scattered and/or absorbed such that the detector detects a smaller quantity of light, on the basis of which it is possible to infer the presence of the analyte. The light source can be pivoted to set various light paths through the room to determine where the analyte is situated in the room based on the output of the detector for each light path. The air-conditioning device can controlled to selectively influence the atmospheric environment locally.
摘要:
A solenoid system for magnetically guided capsule endoscopy, has the following components arranged under a patient table which defines a flat plane: a central coil with normal direction being perpendicular to the flat plane, and four coil pairs arranged in the form of a cross around the central coil with respect to the flat plane. Each pair includes two single coils, the normal directions of which are parallel to the flat plane and offset by 90 degrees in relation to each other.
摘要:
A coil system for the contactless magnetic navigation of a magnetic body in a work space, has a plurality of coils and a current controller for controlling the respective currents in the plurality of coils. In order to navigate the magnetic body to a variably predeterminable position in the work space, the current controller is designed such that the currents in the plurality of coils are such that the magnetic forces generated by the currents and acting upon the magnetic body at multiple positions at the edge of a convex environment around the predetermined position are directed into the environment. The coil system has the advantage that a movement of the magnetic body toward a spatial position is achieved without any mechanical movement of the coil system and without a positioning system for determining the position of the magnetic body. The coil system is utilized particularly in a medical device, wherein a magnetic body in the form of a probe is moved in the body of a patient. In this way, fast navigation of the probe in the patient's body can be achieved without mechanical movements of the patient table or of the coil system.
摘要:
In a method and system for guiding a capsule endoscope, the capsule endoscope contains a rotation sensor that measures a rotary position of the endoscope capsule about at least one fixed capsule axis. A control unit calculates a rotary position of the endoscope capsule from a mechanical movement model, measures the rotary position of the endoscope capsule by means of the rotation sensor, compares the measured rotary position with a rotary position calculated for an essentially identical point in time, and adapts the mechanical movement model on the basis of the comparison.
摘要:
A method for closed-loop control of a linear drive including a stator, a rotor configured for reciprocating movement along a drive axis therein, and a drive coil through which coil current flows, in particular for a linear compressor including a piston housing and a compressor piston configured for reciprocating movement along a piston axis therein, and driven by the linear drive wherein the coil current is subject to closed-loop control, the method including the steps of determining a target coil current and applying an actual coil current wherein the actual coil current and the target coil current are substantially the same value.
摘要:
A reversing linear drive which comprises a field coil and a magnetic armature that is excited by the magnetic field of the field coil to perform a linear, axially oscillating movement. In order to detect the armature position, the drive is provided with a stripe pattern element with an alternating arrangement of transparent and opaque stripes or of light-reflecting stripes and non-light-reflecting stripes which extends at least across the entire axial armature stroke, and with a light barrier with elements that emit and receive light in a direction perpendicular to the axial direction.