A sensor, and method of using the sensor, includes a primary resolver circuit and a static reference resolver circuit. The primary resolver circuit is configured to provide first and second primary analog outputs. The primary analog outputs are indicative of a sensed condition of the sensor. The static reference resolver circuit includes a transformer and is configured to generate first and second reference analog outputs indicative of a reference condition of the sensor. The first and second reference analog outputs match the first and second primary analog outputs when the sensed condition is equivalent to the reference condition.

The disclosure relates to a method for operating a movement apparatus having a first assembly and a second assembly. The first assembly includes a base and several permanent-magnet arrangements that are connected to the base via actuators such that they move as a whole relative to the base in at least one degree of freedom by the assigned actuator, the second assembly including a base and a permanent-magnet arrangement arranged firmly relative to the base. Position controllers are provided, each with a controlled variable and with a correcting variable. The controlled variable is one of six possible degrees of freedom with regard to a relative position between the first and second assembly. The correcting variable represents a force or a torque that has been assigned to the degree of freedom. Desired positions of the actuators are computed from the correcting variables and the actuators are set accordingly.

The present disclosure relates to a displacement sensor. A displacement sensor according to the embodiment of the present disclosure includes a coil structure consisting of wound coil, a shield member formed to surround an outer periphery of the coil structure and a housing, wherein the housing comprises an upper side wall part surrounding an outer periphery of the shield member and a lower side wall part formed to extend from the upper side wall part, wherein an inner circumferential surface of the lower side wall part is protruded toward the inside of the housing more than an inner circumferential surface of the upper side wall part, wherein an outer circumferential surface of the lower side wall part may include a depressed region formed to be depressed into the inside of the housing by a predetermined depth.

A receiver coil of an inductive angular position sensor can have circuit features that become smaller than reasonable for high resolution measurement designs. This is especially true when multiple receiver coils are used, such as in a three-phase configuration, and when each of the multiple receiver coils is in a twisted loop configuration. The disclosed inductive angular position sensor utilizes different spatial frequencies for a rotor coil and the receiver coils. For example, the spatial frequency of the receiver coils may be kept smaller than the rotor coil. In this condition, the fundamental frequency of the angular position sensor is shifted to the least common multiple of the spatial frequencies, making the angular resolution of the inductive angular position sensor high, while the circuit features of the receiver coils are maintained at a reasonable size.

Provided is equipment for transferring a vacuum chamber that solves a problem of heat dissipation of a driver by (i) placing a permanent magnet, which is a stator structure of a linear motor and causes linear motion, inside a vacuum chamber and (ii) by placing a coil of a driver structure outside the vacuum chamber, Under this structure, (i) no cable is installed in inside the chamber, and (ii) heat generated from the driver structure can be smoothly dissipated. The transfer equipment includes; a first-axis linear coil (24) that is fixed to an outside of the vacuum chamber at a bottom surface of the housing (11) of the vacuum chamber (10); a first-axis slider (60) that is installed inside the vacuum chamber (10) and moves in a first-axis direction relative to a bottom of an inner space of the vacuum chamber (10); and a first-axis linear permanent magnet (63). The first-axis linear permanent magnet (63) is arranged in the first-axis direction, is installed in a lower portion of the first-axis slider (60), and slidingly moves together with the first-axis slider (60).

An inductive position measuring sensor comprises a fixed ruler and a sliding ruler which can move relatively along the direction of the measuring axis. A series of coupling coils are made on the fixed ruler in the measuring direction,-two sets of driving coils are disposed on the sliding ruler, and induction coils in a staggered manner are also disposed on the sliding ruler. The two sets of driving coils generate excitation signals, by interaction with the coupling coils on the fixed ruler, and being received by the induction coils of the sliding ruler, they are used for measuring the relative movement of the fixed ruler and the sliding ruler. By controlling the positions and winding directions of the driving coils and the induction coils, the sensor can effectively inhibit the direct space signal interference of the driving coils to the induction coils, and the signal-to-noise ratio is improved.

The electromagnetic induction displacement sensor consists of a transceiver board and an excitation board that may move relative to each other along a measuring path. The transceiver board is arranged with at least one transmitter winding and at least two three-phase receiver windings with different pitches, the number of three-phase receiver windings is one more than that of transmitter windings. Each transmitter winding encircles two three-phase receiver windings with different pitches in the same direction in series, and all receiver windings are in a distributed winding structure. The excitation board is arranged with at least two rows of excitation coils in the shape of short-circuit loop, the number of rows of excitation coils is equal to the number of the three-phase receiver windings on the transceiver board, respectively aligning with corresponding three-phase receiver winding and having the same pitch.

Systems and methods for a vehicle pedal assembly and an inductive sensor assembly thereof. The inductive sensor assembly includes a rotary inductive sensor target and a printed circuit board (PCB) positioned opposite the rotary inductive sensor target. The inductive sensor assembly includes a first inductive sensor circuit defined on the PCB. The first inductive sensor circuit includes a first coil circuit including a first coil having a first electrical current in a first flow direction and a second electrical coil having a second current in a second flow direction opposite to the first flow direction. The first inductive sensor circuit is configured such that a rotation of the rotary inductive sensor target induces a change in the first electrical current and the second electrical current within the first coil and the second coil.

An electromagnetic induction type encoder, wherein a detection head has a drive coil generating magnetic flux, wherein a scale has a plurality of connection coils arrayed in a fundamental period in a measurement axis direction, are electromagnetically coupled with the magnetic flux generated by the drive coil and generates magnetic flux fluctuating in a predetermined spatial period in the measurement axis direction, wherein the detection head has a plurality of receiver coils arrayed in the fundamental period in the measurement axis direction and are electromagnetically coupled with the magnetic flux generated by the plurality of connection coils and detects a phase of the magnetic flux, wherein /22d<L</2 is satisfied when a distance between line width centers of the plurality of connection coils is L and a line width of the plurality of connection coils is d.

An electronic position encoder comprises a scale including a periodic scale pattern along a measuring axis direction having a scale period Ps, and a detector portion comprising a first group of sensing elements, a second group of sensing elements, and a signal processing configuration. The second group of sensing elements is located at a group position which is equal to K2*Ps+PS/M relative to the first group of sensing elements along the measuring axis direction, where K2 and M are integers. The signal processing configuration independently acquires a first set of detector signals from the first group of sensing elements, and a second set of detector signals from the second group of sensing elements, and determines a relative position between the detector portion and the scale pattern based on the first set of detector signals and the second set of detector signals.