摘要:
Die Erfindung betrifft eine elektrische Maschine, insbesondere einen Elektromotor. Der Elektromotor weist einen Stator und einen Rotor auf. Der Elektromotor weist auch einen Rotorpositionssensor auf, wobei der Rotorpositionssensor ausgebildet ist, eine Rotorposition des Rotors entlang eines Rotorumlaufes mittels wenigstens einer Kapazität zu erfassen. Erfindungsgemäß weist der Rotor des Elektromotors der eingangs genannten Art im Bereich des Rotorumfangs wenigstens ein Markierungselement auf, wobei das Markierungselement dielektrisch ausgebildet ist. Der Stator weist wenigstens eine Statorelektrode auf und der Rotor weist eine entlang des Rotorumfangs - bevorzugt vollständig umlaufend - ausgebildete Rotorelektrode auf. Mittels der Rotorelektrode und der Statorelektrode ist ein Kondensator gebildet, wobei eine Kapazitätsänderung des Kondensators durch das Markierungselement erzeugt werden kann.
摘要:
The invention relates to a method for real-time tracking of the operational status of a capacitive sensor mountable onto a rotatable machine and connected to an electronic measurement module via a high-frequency transmission line. Said method includes the steps of: generating, within the electronic module, a signal of conductance compensation for interference from the transmission line and the sensor; generating, within the electronic module, a signal of capacitance compensation for the transmission line and the sensor; sampling a signal representing the capacitance compensation and a signal representing the conductance compensation such as to determine an operation point of the sensor; and analyzing the operation point so as to verify if it is located in a predetermined area.
摘要:
A tensioner, typically hydraulic, for threaded members, the tensioner comprising: a base (4) and a piston (6) defining a pressure space (13) therebetween, the base (4) and piston (6) being arranged to be urged apart along an axis (17) upon introduction of a fluid into the pressure space (13); and a thread-engaging member (7), comprising a body portion (8) of the form of a sleeve and having a threaded interior (30) for engagement with a threaded member (2) and a piston engaging portion (9) carrying a protrusion; in which the piston (6) bears against the protrusion such that the piston (6) exerts a force on the protrusion when urged apart from the base (4) by the introduction of fluid into the pressure space (13); the tensioner further comprising a displacement sensor arranged to determining the relative position of the body portion of the thread- engaging member and the base, the displacement sensor comprising a first part (12) carried on the base (4) and a second part (11) carried on the body portion (8); typically the displacement sensor is a magnetic encoder.
摘要:
The invention relates to a sensor element (1) of a capacitive sensor consisting of two or more layers of a substrate (2), the electrodes (3) of the sensor being inserted between said layers. The sensor element is characterized in that a heating element (5) is integrated into said sensor element (1).
摘要:
A method for improving robustness of a capacitive sensor system has the following steps: a) operating the capacitive sensor system, wherein received sensor signals are filtered by a band-pass filter having a band-pass having a first center frequency; b) polling sensor data at a first rate using the sensor system; c) determining whether a polled sensor value is meeting a predetermined threshold; d) if the predetermined threshold is met: d1) polling sensor data at a second rate being higher than the first rate using the sensor system; d2) verifying that sensor data polled at the second rate are consistent; d3) if the sensor data polled at the second rate are inconsistent, then repeating at least step d2) wherein said band-pass filter is controlled to have a second center frequency.