Abstract: Arrangement for inductive speed detection in which two planar coils are arranged offset at a given distance from a so-called pulse wheel and in the rotational direction of the pulse wheel, and are each part of an oscillator, the oscillator frequency of which is evaluated.

Abstract: A magnetic field sensor for low power applications includes a magnetic field sensing element that, during sample intervals, provides a signal proportional to a sensed magnetic field and also includes a comparator circuit that, during the sample intervals, compares the magnetic field signal to threshold levels to generate a sensor output signal indicative of a strength of the magnetic field. According to a dual sample rate feature, initially the magnetic field signal is sampled at a first predetermined sample rate and, following detection of a transition of the sensor output signal, is sampled at a second, faster predetermined sample rate for a predetermined interval. According to a user-programmable sample rate feature, a user may select to operate the sensor at a fixed, predetermined sample rate or at a user-specified sample rate. The magnetic field sensor may also or alternatively detect the speed and/or direction of rotation of a rotating magnetic article.

Abstract: The invention relates to a device for detecting the movement of a movable component, the device having an inner part 1 and the inner part 1 having a housing in which are mounted conductors 3 that carry electrical components 4 and a sensor element. One end of each conductor 3 protrudes from the inner part 1 forming plug contacts 6, and the inner part 1 is encapsulated by a plastic housing 2 in such a way that the plug contacts 6 project into a plug receiver 5 in the plastic housing. The electrical components 4 and the sensor element are covered by covers and encapsulated by the plastic housing 2. The covers protect the components from the plastic in the encapsulation process.

Abstract: The density of a multipolar magnet in this type of magnetic encoder, in particular, a multipolar magnet composed of a sintered compact, is made uniform. Samarium-iron based magnetic powder is used as magnetic powder, tin powder is used as non-magnetic metal powder, and a compressed molded body 114 is obtained by compression molding of a mixed powder of 20 to 90 wt % of samarium-iron based magnetic powder and 10 to 80 wt % of tin powder. The compressed molded body 114 is sintered at a temperature less than the melting point of the tin powder serving as the non-magnetic metal powder, so that the sintered compact is formed which serves as the multipolar magnet of the magnetic encoder 10.

Abstract: A multiple-point smoothing method for motor-speed estimation. The output of an encoder is over-sampled to obtain over-sampled position differences according to an over-sampling factor M. The over-sampled position differences are averaged to obtain an initial speed estimation. The initial speed estimation is low-pass filtered to obtain a final speed estimation. The final speed estimation is sent to a speed controller to control the speed of a motor. Alternatively, in a composite multiple-point smoothing scheme, the initial speed estimations based on two over-sampling factors are obtained. One of the initial speed estimations is selected based on an average of the two estimations, and the selected initial speed estimation is further processed to obtain a final speed estimation. The method of the present invention can reduce ripple in estimated speed of motor when the motor is operated at high speed.

Abstract: Disclosed is a realization method of a speed signal of a motor using a linear Hall-effect sensor characterized by comprising the steps of: by using a Hall signal in the form of a sine wave of a linear Hall-effect sensor, determining coordinate values on a x-y coordinate system of the position sensor; evaluating a summed coordinate value of the above coordinate values; calculating the angle(?) formed by a summed coordinate value and the x axis; determining the quadrant of the resulted angle(?); and determining a speed signal by dividing the final motor displacement value by the rate of time change.

Abstract: A bearing assembly is proposed which includes a rotational speed detector including a sensor and a sensor holder made of steel. The sensor is adapted to be snap-fitted in the sensor holder. The sensor holder is subjected to cationic electrocoating to improve its corrosion resistance, thereby preventing the sensor from separating from the sensor holder after long use of the bearing assembly. This improves the reliability of the entire bearing assembly.

Abstract: A rotor for a rotation sensor may be mounted on a bearing that supports a wheel on an automotive vehicle so that it can detect the number of revolutions for the wheel. The rotor for a rotation sensor 1 includes a reinforcing ring 2 formed like an L-shape in cross section, including a cylindrical part 3 adapted to be fitted on a peripheral surface of the rotating part of the bearing (inner race or outer race) and a flanged part 4 bent at an end edge of the cylindrical part 3, from which it extends in the radial direction. A multi-pole magnet 10 is attached to the axial outer lateral side of the flanged part 4, and a non-magnetic covering 6 encloses the axial outer lateral side of the multi-pole magnet 10 and has a peripheral edge on its one end secured to the reinforcing ring 2.

Abstract: Device for determining the position of the rotor in an electric motor comprises a detector, which is mounted on the electric motor and which is sensitive to the passage of the rotor through a reference position, and comprises a phase-locking loop, which can be synchronized with the output signal of the detector and which furnishes an output signal representative of the position of the rotor. The moments when the rotor passes through a reference position are detected, the period of the oscillator is adapted in such a manner that the reference position passages occur at a predetermined phase of the oscillator, and the position of the rotor is derived from the oscillation of the oscillator between the reference position passages.

Abstract: A rotation detecting device includes a rotation detecting unit for providing first and second rotation signals in response to rotation of a rotating object and a signal processing circuit for processing the signals to provide rotation data such as the rotation direction, rotation speed and rotation position.

Abstract: A rotation detecting device that includes an electric power generator having a stator and a rotor, said rotor having a plurality of alternating opposite magnetic poles in a circumferential direction of the rotor, at least a first magnetic sensor mounted on either the stator or a support member for supporting the stator and operable to detect the alternating opposite magnetic poles in the rotor; and an electric power supply circuit for utilizing an electric power generated by the electric power generator as an electric power source for the at least first magnetic sensor.

Abstract: A sensor package apparatus includes a lead frame substrate that supports one or more electrical components, which are connected to and located on the lead frame substrate. A plurality of wire bonds are also provided, which electrically connect the electrical components to the lead frame substrate, wherein the lead frame substrate is encapsulated by a thermoset plastic to protect the plurality of wire bonds and at least one electrical component, thereby providing a sensor package apparatus comprising the lead frame substrate, the electrical component(s), and the wire bonds, while eliminating a need for a Printed Circuit Board (PCB) or a ceramic substrate in place of the lead frame substrate as a part of the sensor package apparatus. A conductive epoxy and/or solder can also be provided for maintaining a connection of the electrical component(s) to the lead frame substrate. The electrical components can constitute, for example, an IC chip and/or a sensing element (e.g.

Abstract: To provide a wheel support bearing assembly designed to avoid an ingress of foreign matter from an area, where a sensor is fitted, into the inside of the bearing assembly. The wheel support bearing assembly includes an outer member (1) adapted to be secured to a vehicle body structure, an inner member (2) adapted to support a vehicle wheel, and circular rows of rolling elements (3) interposed between the outer and inner members (1,2). A sensor cap (13) is provided for closing an inboard end of the outer member (1) and has an insert nut (15) embedded therein. The sensor cap (13) is also provided with a reduced diameter hole (23), in which an elastic sealing member (25) is interposed under interference fit between it and a deep end face of the insert nut (15).

Abstract: Apparatus and methods for detecting passing magnetic articles using a first, True Power On State (TPOS) detector during a first time interval and transitioning to a second, running mode detector after the first time interval, when the output of the second detector is accurate. A phase comparator is responsive to the output signal of the first and second detectors and provides a control signal indicative of a change in the phase relationship between the two output signals. An output switch controlled by the phase comparator provides, as the detector output signal, the first detector output signal during the first time interval and the second detector output signal thereafter.

Abstract: A speed sensor for a marine vessel includes a correction circuit to correct any sensor non-linearities so that the sensor produces an output with a pulse stream having a constant pulse rate, and reduces the pulse-to-pulse variations of the pulse stream. The circuit can standardize the pulse stream to have a frequency corresponding to a standard rate.

Abstract: A motorcycle includes radial mount type disk brakes, a brake caliper of the disk brake is mounted on a lower portion of a front fork, which pivotably supports a front wheel, the wheel speed sensor is attached to a mounting boss disposed at the lower portion of one leg of the front fork so as to dispose the wheel speed sensor between the brake caliper and the wheel axle. This mounting location is desirable in terms of lowering costs and ease of brake maintenance.

Abstract: A wheel speed detection system including a rotator, a sensor head, a detector, a pulse converter, a speed calculator and a threshold shifter. Plural concave and convex portions are formed on a periphery of the rotator rotating together with a wheel. The sensor head includes a coil to generate an alternate current magnetic field. The detector excites the coil to generate an eddy current on the concave and convex portions, and outputs alternate current detection signals corresponding to changes in the eddy current generated with rotation of the rotator. The pulse converter converts the alternate current detection signals into pulse signals according to preset threshold levels. The speed calculator calculates rotational speed of the wheel based on the pulse signals. The threshold shifter sifts the threshold levels corresponding to a difference between a default average and an average of the alternate current detection signals actually outputted from the detector.

Abstract: A multiple-point smoothing method for motor-speed estimation. The output of an encoder is over-sampled to obtain over-sampled position differences according to an over-sampling factor M. The over-sampled position differences are averaged to obtain an initial speed estimation. The initial speed estimation is low-pass filtered to obtain a final speed estimation. The final speed estimation is sent to a speed controller to control the speed of a motor. Alternatively, in a composite multiple-point smoothing scheme, the initial speed estimations based on two over-sampling factors are obtained. One of the initial speed estimations is selected based on an average of the two estimations, and the selected initial speed estimation is further processed to obtain a final speed estimation. The method of the present invention can reduce ripple in estimated speed of motor when the motor is operated at high speed.

Abstract: A tone ring of a vehicle anti-lock braking system of the type that is integrated into a disc brake rotor. The tone ring has a protective layer which enables it to withstand the combination of extreme heat and harsh environmental conditions to which it is exposed during operation of the vehicle. The protective layer is applied by thermally spraying a selected one of a plurality of materials, such as a nickel-based alloy, a high-chrome stainless steel, or non-ferrous materials such as an aluminum, copper-based alloys or a ceramic, on teeth of the tone ring, and without causing the protective layer to be deposited on the rotor braking surfaces. The protective layer generally prevents the formation of oxidation and corrosion byproduct layers on the teeth, to thereby maintain sensitivity for detection of teeth movement by the anti-lock braking system sensor during operation of the system.

Abstract: A magnetic sensor device is used for detecting, e.g., a rotational speed of a rotor made of a magnetic material by sensing changes in a magnetic field. The magnetic sensor device is composed of a magnet, electronic components including a sensor chip and wiring for electrically connecting the electronic components. The wiring is formed on a surface of the magnet, and the electronic components are directly mounted on the wiring and electrically connected to the wiring. Alternatively, the electronic components are mounted on the magnet and electrically connected to the wiring via bonding wires. In this manner, a reed frame or a printed circuit board on which the electronic components are mounted can be eliminated to thereby reduce the number of parts used in the magnetic sensor device.

Abstract: A device for sensing the input shaft speed of an automotive automatic transmission that is driven by the engine through the fluid coupling of a torque converter. The speed sensor device includes circumferentially spaced markings about the transmission input shaft and a speed sensor that is placed at close proximity to the circumferentially spaced markings through a hole in the torque converter stator shaft. An electronic control unit (ECU) analyzes the sensor output signal and in the case of an active speed sensor it also functions as its power source. During vehicle operation, the transmission input shaft rotates the target wheel in front of the speed sensor causing modulation of its output signal. The electronic control unit analyzes the signal modulation and calculates the input shaft rotational speed. A variety of sensor/target-wheel options and sensor mounting techniques could be used depending on the application constraints.

Abstract: An outer ring is provided with the stator of a resolver, and a ring member with the rotor of the resolver. The stator comprises an annular core and a winding provided around the core. The ring member is provided at a position opposed to the stator with an eccentric cylindrical face serving as the rotor and eccentric with respect to other outer peripheral surface of the ring member.

Abstract: A hub cap assembly couplable to an axle of a vehicle and operable to obtain data indicative of wheel velocity includes a housing, a hub cap rotatably coupled to said housing, and a speed sensor coupled to said hub cap. The assembly may be inserted into or otherwise coupled to an axle of a vehicle.

Abstract: In a motorcycle, to prevent an increase in the diameter of a hub in association with the mounting of a pulser ring and for increasing the flexibility when arranging a wheel speed sensor. An annular groove is formed on a side surface of an annular rear brake disk in an annular shape. A stepped annular pulser ring is mounted to the side surface of the rear brake disk so that a pulser section is located in the groove. Thus, a space for accommodating the pulser ring on an inner periphery of the rear brake disk is eliminated. In addition, the size of a hub-engagement hole on the rear brake disk may be reduced. Since the pulser section of the pulser ring is located in the groove of the rear brake disk, it does not take much space in the direction of an axle.

Abstract: A sensitizing ring for sensors having a reduced manufacturing cost and an improved profile shape manufacture with a diameter of 120 mm or less. The sensitizing ring of the present invention is used to measure the rate of rotation and position of a rotating element. The sensitizing ring of the present invention is usable in more applications, especially in the automotive industry. The sensitizing ring comprises a body, a plurality of teeth provided on an outer periphery thereof, and a plurality of gaps interposed between the teeth. The body is made of a polymeric material interspersed with a ferromagnetic material. Alternately, the body is made of a polymeric material having a coating layer of ferromagnetic material. In a further embodiment, the body includes ferromagnetic material in the polymeric material forming the teeth but does not include ferromagnetic material in the polymeric material forming the gaps.

Abstract: A method of processing a pulse train output signal provided by a non-contact sensor that senses the rotational speed and angular position of a rotating wheel includes comparing the amplitudes of the pulses with a variable switching threshold value, and adjusting the value of the variable switching threshold value if the difference between the amplitudes of two successive pulses exceeds a maximum value.

Abstract: An exciter ring assembly to detect rotational parameters of an axle within a tube has an exciter ring attached to the axle by an elastomer insert. The insert provides a frictional interference fit with the axle. The insert affixes the exciter ring to rotate with the axle. The elastomer insert is supplied with radially-spaced axial channels to enable oil flow past the assembly. The outer member of the assembly is press fit into the axle tube. The outer member remains stationary with respect to the axle tube. The outer member restricts the axial movement of the exciter ring and enables rotation of the exciter ring and provides oil flow across the exciter ring assembly.

Abstract: A moving object detection device has a magnetic sensor element, a permanent magnet for applying a magnetic field to the magnetic sensor element; a board on which electronic parts are mounted, a holder; and a case. The holder has an integral approximately box-shaped support part to hold the magnet and the board, and the holder is inserted into the case so that the magnetic sensor element, the permanent magnet, and the board are contained in the case. The holder and the case are fitted and fastened to each other by concave-convex-shaped elements.

Abstract: A wheel speed sensor assembly includes a rotor formed with first and second protrusions arranged circumferentially on the outer periphery thereof in two separate rows at an equal angular pitch. The first protrusions are angularly displaced from the respective second protrusions by half the angular pitch of the first or second protrusions. The sensor assembly further includes a senor having two magnetoelectric devices each opposing the first protrusions or second protrusions. With this arrangement, the differential waveform produced by the sensor has a flat stepped portion between any adjacent rising and falling portions of the differential waveform. The flat portions make the rising and falling portions steeper and shorter. Thus, when the sensor vibrates in the rotational direction of the rotor, the differential waveform is less likely to overshoot the upper threshold or undershoot the lower threshold, which in turn prevents abnormal block pulses from being produced.

Abstract: An assembly that includes a target component mounted for rotation about an axis, a sensor mounted adjacent the inner member and directed toward the inner member to measure the rotational speed of the target component and an outer component interposed between the sensor and the target component. Low magnetic permeability of the outer component is assured by appropriate selection of the material, maintaining the concentration of martensite in the outer component below a reference concentration as indicated by certain reference indices such as the Instability Function, and/or by maintaining the temperature at which a stamping operation is performed on the inner member above a pre-determined temperature.

Abstract: A magnetic motion sensor has: two magnetic sensors aligned in a direction along which changes in a magnetic field shift for detecting an appearance of the changes; a differential means for taking out a differential signal of output signals from these two magnetic sensors; and a timing detection means for generating a pulse, indicating a timing at which the changes in a magnetic field pass through either of the magnetic sensors, when an output signal of the magnetic sensor in question strides over a threshold value, while generating a pulse, indicating a timing at which the changes in a magnetic field pass through in between the magnetic sensors, when the differential signal strides over the threshold value.

Abstract: A two-wire type current output sensor includes two external connection terminals to one of which a power supply flows from an outside and from the other one of which the power supply flows to the outside, a detecting element capable of outputting a detection signal, a signal processing circuit for changing a current supplied to a power supply side of the signal processing circuit based on the detection signal of the detecting element and outputting the changed current, and a connection switching circuit for switching a connection between the two external connection terminals and the signal processing circuit such that one of the external connection terminals at a higher voltage is connected to the power supply side of the signal processing circuit while the other one of the external connection terminals at a lower voltage is connected to an output side of the signal processing circuit.

Abstract: A rotation state detecting device capable of detecting the direction of rotation of a rotating body includes first and second bridge circuits made up of magneto-resistance effect elements, a first comparator for detecting the increasing/decreasing direction of the center point voltage of the first bridge circuit, a second comparator for detecting the increasing/decreasing direction of the center point voltage of the second bridge circuit, a third comparator for detecting the difference between the center point voltage of the first bridge circuit and the center point voltage of the second bridge circuit, and logic value information deriving means for outputting “1” when the logic values of the outputs of the first comparator and the second comparator are both “1”, outputting “0” when they are both “0”, and continuing to output the previous value at other times, the direction of rotation of the rotating body being determined on the basis of a combination of the outputs of the first, second and third comparators

Abstract: A method and apparatus for improving speed measurement quality in systems having multi-pole machines is taught. The method compensates for pole misalignment by computing speed based upon moving average techniques. In one embodiment, a moving average speed averaged over a complete interval of rotation is determined, based upon measurements of one or more magnetic pole position sensors for magnetic pole location. In another embodiment, a time interval between two poles is averaged over one or more rotational periods, and the average time interval is used to determine the moving average speed. Computation of the moving average speed reduces errors in speed measurements due to pole misalignment and may provide for smaller control adjustment times for controlling motor speed variability. In one embodiment, the speed measurement system includes a multi-pole rotor, and a controller having a capture timer and a buffer.

Abstract: In a rotation detecting device attached to an end face of a hub bearing for an automobile, a sensor body (a resin molded member) having a holder member and a connector member is integrally formed in a single resin molding process. The rotation detecting device shortens the distance between a detection surface of a molded IC and a rotor. The holder member is defined by a recess with a bottom portion and two sidewalls. The molded IC has a detection surface, a back surface opposite to the detection surface, and side surfaces. The molded IC is fixed on the holder member and exposes the detection surface. The back surface of the molded IC is opposed to the bottom portion of the holder member. The side surfaces correspond to portions to be press-fitted, and the sidewalls of the holder member correspond to portions to press-fit.

Abstract: A rotor of a sensor-less motor has a multiplicity of magnetic poles, with one magnetic pole giving a smaller magnetic flux than other the magnetic poles. A coil is provided at a predetermined position external to the rotor. An induction signal is generated in the coil as the magnetic flux through it is changed by the rotation of the rotor. An index signal indicative of the reference rotational position of the rotor is generated based on the change in the induction signal. Thus, the reference rotational position of the disk of an information recording-reproducing unit, for example, can be detected without utilizing any Hall elements.

Abstract: A speed measuring system comprising at least one stationary speed sensor (4) for detecting a speed of a measuring body (1) rotating relative to the speed sensor (4) wherein the measuring body (1) is provided, on its periphery, with electric or magnetic discontinuities. The speed sensor (4) situated at a defined distance from the measuring body (1), reacts to the discontinuities when the measuring body (1) is moved past the speed sensor (4). The speed measuring system has, in addition, one separate distance sensor (5) for determining an actual distance (LS) and an actual change in distance between the speed sensor (4) and the measuring body (1). In an evaluation device of the speed measuring system the speed of the measuring body (1) is formed from an actual output signal of the speed sensor (4) according to an actual output signal of the distance sensor (5).

Abstract: A gyroscope (10) for determining rate of rotation includes a giant magnetoresistor (GMR) (14) attached to a mass (12) oscillating along a first axis. When the gyroscope (10) is rotated, the mass (12) also oscillates along a second axis perpendicular to the first axis. A magnetic element (16), which includes of a strip of magnetic bits (18), is disposed along the first axis, the second axis, or both. The magnetic bits (18) supply discrete magnetic fields. The GMR (14) changes in electrical resistance when exposed to these magnetic fields. A voltage sensor (20) and processor (34) are then utilized to calculate the rate of rotation.

Abstract: A rotation detection sensor, which is a wheel-speed sensor, has a detection unit placed in a metal capped cylindrical casing and a holder fit in an opening of the casing. A flange is provided along the entire edge of the opening of the casing. Between the flange and the holder, a viscoelastic liquid gasket is entirely applied. The edge of the opening of the casing and the exposed part of the holder are covered with a resin portion. Thus, the viscoelastic liquid gasket smoothly enters the gap between the casing and the holder to ensure the gap is closed. Moreover, since the viscoelastic liquid gasket is quickly cured owing to its solvent which is speedily volatilized, the gasket exhibits a good workability. Then, after the solvent is volatilized, a rubber-based elastic sealing material is produced. The sealing material thus withstands any temperature change without problem, it never occurs that the sealing material melts to leak out, and the sealing between the casing and the holder can be ensured.

Abstract: An arrangement for determining the direction of movement of a motion sensor element, requiring only two sensor elements, which, in a first zone having a first pitch and extending in the form of strips along a motion co-ordinate describing a movement of the motion sensor element, comprises periodically recurrent areas alternately influencing a first magnetic field, and, in a second zone having a second pitch and extending in the form of strips along the motion co-ordinate, comprises periodically recurrent areas alternately influencing a second magnetic field, the arrangement comprising a first sensor element for detecting the influence on the first magnetic field by the first zone of the motion sensor element, and a second sensor element for detecting the influence on the second magnetic field by the second zone of the motion sensor element, the first pitch of the first zone being in an odd, integral ratio to the second pitch of the second zone, such as 1:3, 1:5, etc.

Abstract: A non-contact rotation speed and torque sensing device which uses the natural inhomogeneities in the magnetic properties of a rotating element (4) to measure movement, displacement and deformation of the rotating element. An alternating magnetic field is applied in the region of a rotating element (4) and a signal representing the change in magnetic flux caused by the inhomogeneities of the magnetic structure of the object is received at a sensor (1). By processing the sensed signal using the auto-correlation function, the speed of rotation of the element (4) may be determined through inspection of the periodicity of the signal.

Abstract: To detect the rotational speed and angular position of a rotating wheel, a non-contact sensor (e.g., an optical sensor or a Hall sensor) scans scan marks on the wheel, and generates a pulse train. The amplitude of the pulses is compared in a comparator with a variable switching threshold. To achieve accurate measurement results, and to compensate for offset and long-term drift of the sensor, the switching threshold is adjusted if one or more of the following conditions is met: (i) the difference between the pulse amplitude and the switching threshold exceeds a fixable first maximum, (ii) the difference of the amplitudes of two successive pulses exceeds a fixable second maximum, (iii) the difference of the frequencies of successive pulses exceeds a fixable third maximum.

Abstract: A sensing assembly senses angular speed and position of a device that rotates about an axis of rotation. The axis of rotation is defined with respect to a frame. The sensing assembly includes an encoder target wheel that is fixedly secured to the device. The encoder target wheel rotates about the axis of rotation with the device being measured. A first Hall effect sensor is fixedly secured to the frame at a predetermined distance from the axis of rotation. The first Hall effect sensor has a first output line and transmits a first output thereover. A second Hall effect sensor is also fixedly secured to the frame at the same predetermined distance from the axis of rotation. The second Hall effect sensor is offset from the first Hall effect sensor by ninety degrees. The second Hall effect sensor has a second output line and transmits a second output thereover. A controller is electrically connected to the first and second Hall effect sensors. The controller receives the first and second outputs.

Abstract: The shaft speed monitor includes a hub with a bearing bore with an open end and a bearing end. A bearing stop flange is adjacent to the bearing end. A bearing is pressed into the bearing bore and is seated against the stop flange. A lock ring axially fixes the bearing in the bearing bore. A bobbin with an embedded multi-pole ring magnet and a coil is inserted into the bearing bore in the hub. A spindle with a toothed ring passes through the bearing. The toothed ring is in radial alignment with the ring magnet. Leads connected to the coil pass through a grommet. The grommet is held in a grommet slot in the hub. A seal is pressed into a seal counter bore in the hub and seals against a sealed surface on the spindle as well as against the grommet.

Abstract: A wheel-speed sensor for generating signals representative of the wheel-speed of an individual wheel on a vehicle. Unlike known wheel-speed sensors, the wheel-speed sensor in accordance with the present invention is readily serviceable without disassembly of major components of the wheel assemblies and is relatively simple, and thus less expensive to manufacture, than known wheel-speed sensors. Two embodiments of the wheel-speed sensor in accordance with the present invention are disclosed. One embodiment relates to a “between-the-rows” wheel-speed sensor which includes a magnetic exciter ring that is adapted to be affixed to a rotating axle between rolling element rows of a wheel bearing. In an alternate embodiment of the invention, the wheel-speed sensor is configured to form a grease seal which typically inserts into the end of an axle tube. A wheel-speed sensor utilizes a multiple pole magnetic exciter ring that is adapted to be attached to a rotating axle shaft.

Abstract: A rotation detecting device A, in which a body 5 being detected, for rotation with a front wheel (wheel) 10 is mounted on that insertion portion 1a of a housing 1, through which an axle shaft S is inserted, and rotation of the body 5 being detected is detected by a magnetism detecting element (magnetism detecting means) 3, the body 5 being detected comprising a cylindrical portion (detecting portion) 5a, rotation of which is detected by the magnetism detecting element 3, and an elastic rotation transmitting portion (rotation transmitting portion) 5c for transmitting rotation of the front wheel 10 to the cylindrical portion 5a.

Abstract: An axle unit for a vehicle is provided which comprises a hub that installs thereon a vehicle wheel and is rotatable together with the vehicle wheel, a hub bearing that is mounted on a vehicle body and rotatably supports the hub, a rotary encoder that is attached concentrically to the hub and is rotatable together with the hub, a cover that is made of a non-magnetic material and covers an open end of the hub bearing that is located on the side thereof where the rotary encoder is provided, a rotational speed sensor that has a detecting section that is made of a magnetic material and disposed outside the cover and so as to face the rotary encoder, and a magnetic body that is provided at a portion of the cover that is placed between the detecting section of the rotational speed sensor and the rotary encoder.

Abstract: A vibration damping feature for a sensor assembly, particularly a variable reluctance position sensor including a spool assembly, a harness assembly mechanically and electrically joined to the spool assembly, and a cap which sealingly encloses the spool and harness assemblies. The vibration damping feature preferably is in the form of a plurality of crush ribs provided on the periphery of an upper disk of the spool assembly adjacent the joints. The crush ribs contactingly abut the cap sidewall so as to positively locate, in a fixed relationship, the spool assembly relative to the cap adjacent the joints.

Abstract: A rotation detecting device includes a rotating direction determining means for determining a rotating direction of the rotor based on a first signal and a second signal, generating a rotating direction signal based on the first signal and the second signal, and outputting a rotating direction determining signal by switching the rotating direction signal with an external switching signal wherein the pulse signal generating means generates the pulse signal in response to the rotating direction determining signal.

Abstract: An apparatus for attaching sensors to rotating shafts on equipment includes a cup magnet and a housing for receiving the cup magnet. A target rotor is displaced within the housing which rotates when attached to a rotating shaft for the purpose of sensing the shaft rotation. Alternately, the cup magnet may be permanently attached to a rotating couple rather than a non-rotating housing. A preferred embodiment may have a dust cover.