A system for determining an amplitude of a sinusoidal output waveform from a sensor includes a controller configured to provide a sample signal having a sample frequency that is four times a frequency of a sinusoidal excitation waveform provided to the sensor. The sensor has inductively-coupled primary and secondary windings that produce the sinusoidal output waveform from the secondary winding when the excitation waveform is provided to the primary winding. An analog-to-digital converter measures a first and second voltage of the sensor waveform separated in time by the period of the sample frequency, and the system calculates the amplitude based on the measurements of the first and second voltages.

A system for determining a phase angle of a sensor waveform relative to an excitation waveform includes a controller that provides an excitation signal having an excitation frequency and a sample signal having four times the excitation frequency. An exciter provides a sinusoidal excitation waveform at the excitation frequency to a primary winding, thereby inducing a sensor waveform in a secondary winding. An analog-to-digital converter (ADC) measures a first and second voltage of the sensor waveform separated in time by the period of the sample frequency, and a wrap-around ADC measures a first and second voltage of the sinusoidal excitation waveform. The first voltage measurements are made at the same time, and the second voltage measurements are made at the same time. The system calculates the phase angle based on the first voltage measurements and the second voltage measurements.

Apparatuses, systems, and associated methods of assembly are described that provide for improved sensor wire retention. An example sensor wire retention device includes a bobbin tube that defines a hollow interior configured to receive a probe assembly inserted therein. The device includes one or more coil elements wrapped around at least a portion of the bobbin tube. One or more washers are attached around the bobbin tube, and each of the one or more washers defines one or more wire notches. The device includes a wire harness of one or more wires, and each of the one or more wires of the wire harness are positioned within the one or more wire notches. The device further includes a return shield element disposed around the wires located within the wire notches of the one or more washers, and the return shield element compresses the one or more wires.

An inductive position sensor including at least two secondary windings consisting of a plurality of turns that are formed on two opposite faces of a printed circuit board and divided into first and second sectors. The first and second sectors are divided, in one turn width, into a first portion on one face of the printed circuit board and a second portion on an opposite face. The second portion of the first sector is extended by a first portion of the second sector and the first portion of the first sector is connected to the second portion of the second sector of a neighboring turn. The portions are connected pairwise by a respective via passing through the printed circuit board.

An apparatus for sensing a rotating body includes a detection target arranged on a surface perpendicular to an extension direction of a rotating shaft of the rotating body, a sensor module facing the detection target, and comprising two sensors disposed in a rotation direction of the rotating body, and a rotation information calculator configured to calculate rotation information of the rotating body based on sensed values from the two sensors, wherein the rotation information calculator is further configured to calculate a rotation angle of the rotating body in accordance with a difference value generated from the sensed values.

A measurement method using an inductive displacement sensor including a magnetic core and transformer with a primary winding and two secondary windings. The method includes an excitation phase of applying an AC excitation voltage across the primary winding terminals; acquisition phase for acquiring and digitizing two measurement voltages across the two secondary windings' terminals; first main processing phase performed on two measurement voltages including the steps of: multiplying the measurement voltage by a reference sine wave and reference cosine wave to obtain two resulting signals; carrying out a first integration of each resulting signal over a sliding window with width equal to the excitation period to obtain two integrated signals; carrying out a second integration of each integrated signal over a sliding window with width equal to half an excitation period to obtain two doubly integrated signals; producing amplitude of the measurement voltage from the doubly integrated signals; first final processing phase for producing a positional estimate of the magnetic core from the amplitudes of the two measurement voltages.

Systems and methods for sensor position measurements are provided. Aspects include receiving, through a first signal path, a first secondary signal from a first sensor and a built in test (BIT) signal, wherein the first signal path comprises a first multiplexer connected to a first filter, receiving, through a second signal path, a second secondary signal from the first sensor and the BIT signal, wherein the second signal path comprises a second multiplexer connected to a second filter, wherein the first signal path and the second signal path are connected to a third multiplexer, wherein the third multiplexer is connected to a first analog to digital converter (ADC), receiving, by a controller, an output signal from an output of the first ADC, and determining, by the controller, a position measurement for the first sensor based on the first secondary signal, the second secondary signal, and the BIT signal.

An inductive position detector (IPD) for stylus position measurement in a scanning probe comprises two substrates located along a central axis in the probe with a motion volume therebetween, each including N rotary sensing coils (RSCs) and respective axial sensing coil configurations (ASCC). A stylus-coupled conductive disruptor moves along Z (axial) and X-Y (rotary) directions in the motion volume. A generating coil (GC) generates a changing magnetic flux encompassing the disruptor and coils, and coil signals indicate the disruptor and/or stylus position. Axial projection of the disruptor defines axial sensing overlap area (ASOA) with the ASCC, and rotary sensing overlap areas (RSOAs) with respective RSCs. The IPD is configured such that the ASOA is independent of disruptor position, and N complementary pairs (CPs) of RSCs are provided, wherein the magnitude of the change in the RSOA in the two coils of a CP is the same for any disruptor displacement.

A method for detecting an open line (10) of a receiver coil (17; 18) of a resolver (16) comprisesproviding a pull-up resistor (R.sub.1; R.sub.3) and a pull-down resistor (R.sub.2; R.sub.4) at the terminals (7a, 7b; 8a, 8b) on a control device (1) for the signal lines (13a, 13b; 14a, 14b) of the receiver coil (17; 18);measuring the voltage between the two signal line terminals (7a, 7b; 8a, 8b) of the receiver coil at two sampling times provided symmetrically at the middle of the excitation period;calculating an offset value by calculating an average value that comprises the measured values measured at the two sampling times in an excitation period; andidentifying an open line (10) if the offset value exceeds a threshold value.

A method and system to measure a parameter associated with a component, device, or system with a specified accuracy, including: providing one or more sensors operably disposed to detect the parameter; obtaining a coarse measurement of the parameter within a first range using the one or more sensors, wherein the first range includes minimum and maximum values for the parameter; obtaining a fine measurement of the parameter within a second range using the one or more sensors, wherein the second range is smaller than the first range and has a specified ratio to the first range that provides the specified accuracy; determining a current value of the parameter by combining the coarse and fine measurements; and providing the current value of the parameter to a communications interface, a storage device, a display, a control panel, a processor, a programmable logic controller, or an external device.