A system may include a sensor configured to output a sensor signal indicative of a distance between the sensor and a mechanical member associated with the sensor, a measurement circuit communicatively coupled to the sensor and configured to determine a physical force interaction with the mechanical member based on the sensor signal, and a compensator configured to monitor the sensor signal and to apply a compensation factor to the sensor signal to compensate for changes to properties of the sensor based on at least one of changes in a distance between the sensor and the mechanical member and changes in a temperature associated with the sensor.

A phonic wheel having a body and a tooth is disclosed. An embodiment of the phonic wheel includes a body that is configured to rotate about a rotation axis. The tooth is attached to the body. The tooth has a first axial end relative to the rotation axis, a second axial end opposite the first axial end, and a mid portion extending between the first and second axial ends. The mid portion has a substantially axially uniform height from the body. The first axial end has a greater height from the body than the height of the mid portion.

Disclosed are a portable surface characteristics measurement device and a control method thereof. The portable surface characteristics measurement device includes: a roughness sensor configured to convert a signal sensed from a surface of an object during movement of the portable surface characteristics measurement device on the surface of the object into an electric vibration signal; a movement measurement sensor configured to measure a movement physical quantity of the portable surface characteristics measurement device; and a processor configured to change a sampling interval depending on the measured movement physical quantity, and sample the vibration signal in real time, wherein the processor is configured to perform Fourier transform on the sampled vibration signal, and identify a peak frequency band shown in the Fourier-transformed vibration signal as surface roughness information of the object.

An apparatus for tensioning a fastener while measuring displacement of the fastener relative to a female threaded member may include a driver extension having an interior channel aligned along the extension's central cylindrical axis, open to a socket driver at an output end of the driver. The apparatus may further include a measurement probe in the interior channel, coupled to a measurement indicator on an exterior of the extension by a coupling that moves the measurement indicator in proportion to movement of the measurement probe and a measurement gauge coupled to an exterior of the driver extension that gauges displacement of the measurement indicator. A method for using the apparatus includes driving a female threaded member along a threaded rod by the driver extension while holding the measurement probe against an end of a bolt, screw, or other threaded fastener of which the threaded rod forms a part and while reading the measurement gauge.

A target configured to be used with a position sensor for sensing a position of the target is described. The target includes at least one elongated conductive loop structure for allowing eddy currents to flow therein and configured to affect a magnetic field received from the position sensor in a preferred direction along the at least one elongated conductive loop structure.

The present invention relates to a system for monitoring plunger movement in non-energized condition in real time. More particularly, the present invention relates to a system comprising a plunger, a locking pin, a permanent magnet and a multi-point sensor to measure the position of plunger in a non-energized condition and to improve the automatic shut off or start on the pump.

A capacitive measurement device for indicating when two surfaces moving relative to each other are spaced less than a predetermined distance apart. The device comprises a probe having an elongated conductor, an insulating core, a conducting inner guard, an insulating interlayer, and a conducting sheath. A portion of the conductor, insulating core and conducting inner guard form a probe tip which extends beyond the insulating interlayer and conducting sheath by a predetermined offset. The probe is configured to extend from a first surface by a predetermined distance and to generate a signal when the tip is contacted by a second surface.

A stator module for electromagnetically driving a rotor of a planar drive system comprises a connection module to provide drive energy. A power module has a current-generating unit to generate a drive current, which drives the rotor, from the drive energy. A stator unit has a coil conductor, to which the drive current can be applied, for generating a magnetic field which drives the rotor. A sensor module comprises a position-detecting unit to detect a position of the rotor over the sensor unit. The sensor module is arranged in a module housing. The stator unit and power module are arranged on a top side of the module housing and the connection module is arranged on a bottom side. The current-generating unit and the connection module are connected via a drive energy line. The drive energy line passes through the module housing in a manner electrically insulated from the sensor module.

An arrangement (100, 200, 300) for monitoring of at least one distance between antenna units, the arrangement comprising at least two antenna units (104, 106, 116, 118, 136, 138), each antenna unit being associated with a radio unit (108, 110), the arrangement additionally comprising at least one radio unit being associated with at least one of the at least two antenna units, and at least one processor. The two antenna units are configured to placed at at least first and second locations, the arrangement being configured to execute at least two measurement cycles wherein during each measurement cycle the arrangement is configured to transmit at least one signal via antenna units one at a time and determine phase information for said signals being received by remaining antenna units. Distance variables determined based on the phase information are used to determine a change in distance between antenna units between measurement cycles.

The invention relates to a method and an apparatus for ascertaining a positional deviation of a brake disc (30) relative to a caliper seat (11). According to the invention, an angular deviation (34) from the parallel between the brake disc (30) and the caliper seat (11) is measured in that an apparatus (1) for ascertaining the positional deviation of the brake disc (30) is connected to the caliper seat (11), the apparatus (1) comprising at least two distance sensors (20, 22) that are stationary with respect to the caliper seat (11) and take measurements in the direction of a first flat face of the brake disc (30), the distance sensors (20, 22) transmitting distances (A, A′) between the first flat face of the brake disc (30) and the distance sensors (20, 22) measured at different radii (R, R′) of the brake disc (30) to an evaluation device, the angular deviation (34) of the brake disc (30) being ascertained by the evaluation device from the distances.