Class / Patent application number | Description | Number of patent applications / Date published |
324166000 | Including speed-related frequency generator | 58 |
20080224691 | METHOD FOR TESTING ROTATION SPEED OF FAN - An exemplary method for testing rotating speed of a fan, includes the following steps: coupling a fan and a resistor in series to a power supply; coupling an oscilloscope in parallel with the resistor; plotting voltage across the resistor on a screen of the oscilloscope, and obtaining the period of the voltage according to the image; and obtaining the rotating speed of the fan. | 09-18-2008 |
20090015241 | METHOD AND APPARATUS FOR SENSING AND CONTROLLING FAN SPEED - One embodiment of the present invention provides a system that determines fan speeds for a set of fans in a computer system. During operation, the system receives time-series data collected by a vibration transducer associated with the computer system, wherein the vibration transducer is configured to record mechanical vibrations from the set of fans. Next, the system performs a spectral analysis on the time-series data to obtain frequency peaks associated with fan speeds for individual fans in the set of fans. The system then identifies fan speeds for the individual fans in the set of fans from the frequency peaks. | 01-15-2009 |
20090021242 | DEVICE AND METHOD FOR MEASURING A QUANTITY REPRESENTING THE ROTATIONAL SPEED OF A MOTOR VEHICLE AND SYSTEM AND METHOD USING SAID DEVICE AND METHOD - The invention concerns a device for measuring a quantity representing the rotational speed of a motor vehicle wheel ( | 01-22-2009 |
20100117628 | SENSOR FOR THE DETERMINATION OF LOW (ZERO REVOLUTION) AND FAST REVOLUTIONS AS WELL AS FOR THE SIMULTANEOUS DETERMINATION OF DIRECTION OF ROTATION - A measurement of a lower and a higher speed of rotation is taking place via the inductive sensor. A sensor unit, which comprises a pulse generator, a transmitter side and a receiver side, is used for determining the speed of rotation, whereby the transmitter side comprises a transmitter inductor connected with an oscillator, and the receiver side comprises two receiving inductors. The signal, which is generated by the two receiver inductors and transmitted along each of the signal paths, is forwarded to two signal processing units. Through each of the two signal paths, for lower and higher speed of rotation, the processed signal is forwarded to a logic device. | 05-13-2010 |
20100327853 | PHASE LOCKED LOOP FOR CONTROLLING MOTOR AND SPINDLE MOTOR USING THE SAME - A PLL for controlling a motor includes first and second feedback loops. The first feedback loop includes an oscillator for generating a signal having a frequency corresponding to an input voltage, a first phase comparator for outputting a first phase difference signal corresponding to a phase difference between the signal from the oscillator and an input signal, and a first smoothing filter for smoothing the first phase difference signal to output the smoothed signal as the input voltage. The second feedback loop includes a second phase comparator for outputting a second phase difference signal corresponding to a phase difference between a signal having a frequency corresponding to a rotational speed of the motor and the input signal, an adder for adding the first and second phase difference signals, and a second smoothing filter for smoothing an output of the adder to output the smoothed signal to the motor. | 12-30-2010 |
20130038319 | PLASTIC SPEED TARGET WHEEL AND METHOD OF MANUFACTURE - A speed target wheel includes an annular body portion and a plurality of gear teeth. The annular body portion consists of a plastic material and the plurality of gear teeth project from the annular body portion. Each of the plurality of gear teeth includes a base portion adjacent the annular body portion and a tip portion, where the base portion is integrally formed with the annular body portion and substantially comprises the plastic material, and where the tip portion includes a ferrous region integrally encompassed by the plastic material. | 02-14-2013 |
20130069634 | SPEED SENSOR COMPRISING A COSTAS LOOP - A speed sensor including at least one sensor element and an analog-to-digital converter that digitizes the output signals of the at least one sensor element, and a Costas loop unit that is connected to the output of the analog-to-digital converter. | 03-21-2013 |
20130342189 | ROTATIONAL DEVICE - A rotational device comprises a first portion, a rotatable body rotatable relative to the first portion and comprising at least one salient member, and a speed sensor arrangement for use in measuring a speed of rotation of the at least one salient member, the speed sensor arrangement comprises a signal electrode, at least a portion of which is located between the rotatable body and the first portion, there being an electric potential difference between the signal electrode and the first portion in use, the signal electrode being configured to output a first signal in use which is a function of the speed of rotation of the at least one salient member; a guard electrode, at least a portion of which is located between the signal electrode and the first portion, the guard electrode being separated from the signal electrode by at least a first electrically insulating portion, and the guard electrode being separated from the first portion by at least a second electrically insulating dielectric portion; and a buffer arrangement configured, in use, to provide a second electrical signal to the guard electrode; the second electrical signal being arranged to place the guard electrode at an electrical potential such that the potential difference between the signal electrode and the guard electrode is less than the potential difference between the signal electrode and the first portion. | 12-26-2013 |
20140028292 | IDENTIFICATION SYSTEM AND ELECTRONIC SYSTEM FOR IDENTIFYING A FAN TYPE OF A FAN - A fan identification system identifies a fan type of a fan in an electronic system. The fan identification system includes a controller that includes: a setting module for setting a fan identification characteristic value corresponding to a pulse width modulation duty cycle with a substantial maximum difference between a fan speed of a first type of fan and a fan speed of a second type of fan; a reading module for reading a stable fan speed value after the fan receives the fan identification characteristic value and is initiated with the fan identification characteristic value; and an identification module for identifying the fan as the first type of fan or the second type of fan based on which fan has a predetermined fan speed that is the closest to the stable fan speed value when operating at the fan identification characteristic value. | 01-30-2014 |
20140035561 | VARIABLE RELUCTANCE SENSOR INTERFACE WITH INTEGRATION BASED ARMING THRESHOLD - An interface for processing a variable reluctance sensor signal provided by a variable reluctance sensor including an integrator, an arming comparator and a detect circuit. The integrator includes an input for receiving the variable reluctance sensor signal and an output providing an integrated signal indicative of total flux change of the variable reluctance sensor. The arming comparator compares the integrated signal with a predetermined arming threshold and provides an armed signal indicative thereof. The detect circuit provides a reset signal after the armed signal is provided to reset the integrator. A corresponding method of processing the variable reluctance sensor signal is also described. | 02-06-2014 |
20140035562 | METHOD, IDENTIFICATION SYSTEM, AND ELECTRONIC SYSTEM FOR IDENTIFYING A FAN TYPE OF A FAN - Disclosed is a method for identifying a fan type of a fan in an electronic system having a controller. The method includes: setting a fan identification characteristic value, the fan identification characteristic value corresponding to a PWM (pulse width modulation) duty cycle with a substantial maximum difference between the fan speed of a first type of fan and the fan speed a second type of fan; receiving, via the fan, the fan identification characteristic value; initiating the fan with the fan identification characteristic value; reading, via the controller, a stable fan speed value of the fan; identifying, via the controller, the fan type of the fan based on which fan has a predetermined fan speed (RPM) that is the closest to the stable fan speed value (RPM) when operating at the fan identification characteristic value (PWM). | 02-06-2014 |
20140247038 | FAN SPEED TESTING DEVICE - A fan speed testing device is provided. The device includes a power jack, a voltage conversion module, a first fan connector, a DIP switch, and a control module. The first fan connector receives voltage from the power jack and outputs a PWM signal to a fan, receives a first feedback signal from the fan, and outputs the first feedback signal to the control module. The control module receives the predetermined voltage, sets the rotation speed of the fan as marked or predicted by the manufacturer, and outputs the generated PWM signal to the first fan connector. The control module further analyzes the first feedback signal to determine an actual rotation speed of the fan, and outputs the predicted rotation speed of the fan and the first actual rotation speed of the fan, by visual or audible signal to the user for comparison purposes. | 09-04-2014 |
20140253104 | METHOD OF DETERMINING A ROTOR DISPLACEMENT ANGLE - A method of determining a rotor displacement angle of a synchronous generator having a rotor and electrically connected to a power supply network uses at least one rotary speed measuring device. During a revolution of the rotor, in particular during each revolution of the rotor, the measuring device communicates at least one rotary speed signal to an evaluation unit. A frequency measuring device communicates a frequency signal to the evaluation unit for each period duration of a voltage signal of the power supply network. A time duration between communication of the rotary speed signal and communication of the frequency signal is determined by the evaluation unit, and the rotor displacement angle is inferred in dependence on the determined time duration. | 09-11-2014 |
20150346233 | WIRELESS SPEED SENSOR - A speed and position sensing device designed for retrofitting onto the wheel of a vehicle is provided. The provided sensor transmits measurement data by means of wireless communications and thus achieves the easy installation. The provided sensor is able to power itself by harvesting the energy generated as the result of the wheel rotation. | 12-03-2015 |
20160054348 | VEHICLE WHEEL SPEED SENSOR PROTECTION STRUCTURE - In a vehicle including a pulse ring that rotates together with a wheel, a wheel speed sensor that has a detection portion close to the pulse ring, and a bracket that fixes the wheel speed sensor, a tubular protective wall surrounding the detection portion is provided on the bracket so that an end part, on the pulse ring side, of the protective wall is closer to the pulse ring than the detection portion) of the wheel speed sensor is. This enables the wheel speed sensor to be protected without adding a special component. | 02-25-2016 |
324167000 | Including rotating magnetic field actuated indicator | 2 |
20110260712 | CYCLE METER ADJUSTMENT DEVICE - An example cycle meter adjusting device includes a circuit configured to provide voltage pulses and an adjustable potentiometer configured to vary the frequency of the voltage pulses provided by the circuit. A coupling interface is configured to selectively communicate the voltage pulses provided by the circuit to a cycle meter having a display. The voltage pulses adjust a number of cycles shown on the display. Another example cycle meter adjuster includes a circuit configured to provide voltage pulses. A controller is configured to selectively adjust a frequency of the voltage pulses. A connection interface is configured to communicate the voltage pulses to a cycle meter. | 10-27-2011 |
20140028293 | MEASURING SPEED OF ROTATION OF A DOWNHOLE MOTOR - The invention relates to downhole motors for rotating drill bits. The downhole motors may comprise stators, turbines or the like. The drilling motor may comprise a drilling apparatus comprising a drill bit connected to a rotor rotatably housed within a stator (or a turbine rotor in a housing), the rotor comprising at least one magnetic field source or magnetic field detector, and the stator comprising at least one magnetic field source if the rotor comprises a magnetic field detector or comprising at least one magnetic field detector if the rotor comprises a magnetic field source, thereby allowing the rotation speed of the rotor relative to the stator to be measured. | 01-30-2014 |
324173000 | Including magnetic detector | 39 |
20080272765 | Brushless DC Motor Using Linear Hall-Effect Sensor And Realization Method Of Speed Signal Thereof - 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(θ) formed by a summed coordinate value and the x axis; determining the quadrant of the resulted angle(θ); and determining a speed signal by dividing the final motor displacement value by the rate of time change. | 11-06-2008 |
20080297143 | Magnetic Encoder and Wheel Bearing Provided with the Same - 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. | 12-04-2008 |
20080315865 | LOW POWER MAGNETIC FIELD SENSOR - 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. | 12-25-2008 |
20090021243 | Inductive Speed Detector - 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. | 01-22-2009 |
20090051349 | WHEEL SPEED SENSOR - A speed sensor assembly includes a bearing having a first race, a second race, a plurality of ball bearings separating the first race from the second race, and a tone wheel coupled to the second race. The speed sensor assembly also includes a spacer abutting the first race and a sensor positioned adjacent the tone wheel. | 02-26-2009 |
20090072814 | Wireless System And Method For Collecting Rotating System Data - A wireless system for collecting data indicative of a tire's characteristics uses at least one open-circuit electrical conductor in a tire. The conductor is shaped such that it can store electrical and magnetic energy. In the presence of a time-varying magnetic field, the conductor resonates to generate a harmonic response having a frequency, amplitude and bandwidth. A magnetic field response recorder is used to (i) wirelessly transmit the time-varying magnetic field to the conductor, and (ii) wirelessly detect the harmonic response and the frequency, amplitude and bandwidth, associated therewith. The recorder is adapted to be positioned in a location that is fixed with respect to the tire as the tire rotates. | 03-19-2009 |
20090096441 | Sensor-equipped rolling bearing apparatus - An annular member is mounted on an outer ring, and a sensor is fixed to the annular member. The annular member includes a fixing portion, and a cover portion. The sensor is fixed to the fixing portion by a bolt and a nut. The fixing portion is fixed to the cover portion by bolts. The cover portion is separate from the fixing portion, and therefore does not have an opening extending in a circumferential direction, and covers a magnet rotor fitted on an inner ring in the circumferential direction. | 04-16-2009 |
20090121706 | Active Sensor Element and Method of Determining the Temperature of an Active Sensor Element - The invention relates to an active sensor element for recording the speed of an exhaust gas turbocharger, comprising a suppressor circuit which has at least one diode. In order to specify a device for temperature measurement at the turbocharger and in particular at the turbocharger in the region of the active sensor, the current-voltage characteristics of the diode are evaluated for determining the temperature in the sensor element. | 05-14-2009 |
20090134864 | Inductive Sensor - The invention relates to an inductive sensor with an electrical coil assembly ( | 05-28-2009 |
20090189598 | Speed sensor - A probe for sensing the movement of a body of magnetic material comprises a magnetically energisable pole piece and a plurality of electrically conductive circuits, coupled to the magnetic pole piece, such that a change in magnetic flux in the pole piece caused by movement of the body relative to the pole piece induces a voltage in each of the circuits. The electrically conductive circuits are wound around in a symmetrical fashion each other such that in the vicinity of the magnetic pole piece each circuit experiences substantially the same change in magnetic flux. A probe of this type provides a plurality of substantially identical output signals and is easy to manufacture and replicate. | 07-30-2009 |
20090251132 | ROTOR FOR ROTATION SENSOR - 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 | 10-08-2009 |
20090256550 | Wheel Speed Detecting Apparatus And A Wheel Bearing Apparatus Incorporated With A Wheel Speed Detecting Apparatus - A wheel speed detecting apparatus incorporated with a wheel bearing apparatus. The wheel speed detecting apparatus has an encoder, and an annular sensor holder arranged opposite to the encoder. The sensor holder has an annular fitting member formed from a steel plate. A holding portion is integrally molded with the annular fitting member. A wheel speed sensor is arranged opposite to the encoder. Several substantially circular arc notches are formed on the outer circumference of the holding portion so that portions of the periphery of the annular fitting member are exposed from the holding portion. | 10-15-2009 |
20100026279 | Apparatus and Method for Providing an Output Signal Indicative of a Speed of Rotation and a Direction of Rotation as a Ferromagnetic Object - An apparatus and a method provide an output signal indicative of a speed of rotation and a direction of rotation of a ferromagnetic object capable of rotating. A variety of signal formats of the output signal are described. | 02-04-2010 |
20100072983 | HUB MOUNTABLE SPEED SENSING DEVICE - A hub mountable speed sensing device comprising a housing, a metallic tubular insert adapted to be press-fitted with respect to said housing, a stationary speed sensing probe comprising a magnetic conversion device having a bias magnet and adapted to be inserted into the housing in close proximity to a rotating member having sensing teeth along its axis made of ferrous material, a locking arrangement provided to prevent the said detection probe from dislodging from said housing, and wherein the said bias magnet is adapted to generate magnetic flux which is interrupted by the rotor tooth while rotating and said magnetic conversion device providing for speed sensing based on the change in flux density. | 03-25-2010 |
20100231201 | Low Mass Driveshaft Speed Sensor Assembly - A speed sensor assembly comprises: a driveshaft with a driveshaft axis, a sensing portion of the driveshaft having an axial bore along the driveshaft axis and multiple axial slots radially spaced around the sensing portion that penetrate through the driveshaft into the axial bore; and at least one electromagnetic sensor with a magnetic circuit proximate the sensing portion of the driveshaft; wherein rotation of the driveshaft causes the slots in the sensing portion to sequentially pass through the magnetic circuit of the electromagnetic sensor, thereby causing a change in the reluctance of its magnetic circuit that induces the electromagnetic sensor to generate an output signal that is representative of the rotational speed of the driveshaft. | 09-16-2010 |
20100231202 | MAGNETIC FIELD DETECTOR HAVING A VARIABLE THRESHOLD - Apparatus for detecting a passing magnetic article includes a peak detector providing a detector output signal that changes state when the magnetic field signal differs from a magnetic field tracking signal by more than a threshold offset amount. The threshold offset amount is dynamically variable in response to detection of a speed of rotation of the magnetic article and a peak-to-peak signal level of the magnetic field signal. | 09-16-2010 |
20100264908 | SHAFT SPEED SENSOR WITH ANALOG OUTPUT - A 2-wire, loop-powered shaft rotational speed sensor device that outputs a 4-20 mA current in response to the shaft rotational speed. The device is comprised of a sensor that senses an output from a sensor disk and outputs a series of voltage pulses whose frequency varies with the shaft rotational speed. A microcontroller measures this pulse frequency and generates a digital code representative of that frequency. A digital-to-analog converter generates an analog waveform in response to the digital code. A loop-powered, voltage-to-current circuit generates the output current in response to the analog waveform. | 10-21-2010 |
20100271008 | Motorcycle wheel speed transmission mechanism for speedmeter - A motorcycle wheel speed transmission mechanism includes a gear housing affixed to the front fork of a motorcycle and having an outside receptacle and an outside sensor mount, a driven gear mounted inside the gear housing and rotatable with the front wheel of the motorcycle, an output gear mounted in the outside receptacle and meshed with the driven gear, an annular magnet holder mounted on the gear shaft of the output gear and defining therein a plurality of equiangularly spaced magnetic zones, and a speed sensor mounted in the sensor mount and electrically connected to an electronic speedometer of the motorcycle through a transmission line for detecting the revolving speed of the annular magnet holder and transmitting detected data to the electronic speedometer for display. | 10-28-2010 |
20110267039 | MAGNET AND HOLDER ASSEMBLY HAVING IMPROVED ROTATIONAL AND AXIAL STABILITY - A magnet held in a magnet holder is constrained against radial or axial instability, or against both, by a shape on either component in contact with complementary shape on the other component, the shaped components generally defining a tab-and-slot arrangement. The magnet component may be a bonded magnet and in one embodiment may be formed in place by injection molding. The magnet also will exhibit improved magnet properties when magnetized to have lines of polarity matching a path defined by the bulk of the magnetic material as governed by the location of tabs on the magnet. The invention is useful in magnet-sensor assemblies found in industrial applications and in automotive applications such as power steering systems. | 11-03-2011 |
20110316525 | Power transmission monitoring and maintenance systems and methods - Power transmission monitoring systems includes rotation speed sensors mounted to hubs of a power transmission pulley. A sensor comprises a rotation sensing device, and a controller receiving rotation data therefrom and determining rotation speed of the pulley. A transmitter transmits rotational speed of the pulley to a receiver, which may include or be connected to a device that compares the rotational speed to rotational speed in transmissions from other sensors to determine slip in the power transmission system. The rotation speed sensing device may be an accelerometer, or a gravitational torque harvester. A harvester might include a rotor body rotating with the pulley and mounting induction coils, and a gravitational torque stator mounting an induction magnet and including an air vane damper maintaining the stator stationary with respect to the rotor, through air resistance. The transmissions may be employed to monitor, maintain and repair the power transmissions system. | 12-29-2011 |
20120062214 | CONTACTLESS ELECTRICAL CONNECTOR FOR AN INDUCTION SENSOR, AND SENSOR INCLUDING SUCH A CONNECTOR - An electrical connector between an induction sensor and a cable for transmitting a signal provided by the sensor, including a current transformer with a primary coil and a mechanism for electrically coupling to the sensor, and a secondary coil with a mechanism for electrically coupling to the cable, the primary and secondary coils being attached together by a removable attachment mechanism. | 03-15-2012 |
20120092000 | Arrangement For Intrinsically Safe detetion Of A Whell Rotational Speed - Disclosed is an arrangement for detecting rotational speed of a wheel or any other rotating body by a sensor ( | 04-19-2012 |
20140070794 | SENSOR AND TOOTH ARRANGEMENT FOR SHAFT SPEED DETECTION - A non-ferrous shaft includes multiple non-integral ferrous tooth components, thereby allowing a sensor to detect the shaft speed. | 03-13-2014 |
20140253105 | METHOD FOR DETERMINING A ROTARY SPEED OF A DEVICE - A device configured for rotary speed measurement includes a speed transmitter on which segments are distributed across a radial circumference and a sensor that is substantially stationary relative to the speed transmitter. A method for determining the rotary speed of the device includes continuously determining pass-through times of all segments relative to the sensor, continuously determining revolution times of the speed transmitter by summing the pass-through times of all segments over a complete revolution, and continuously determining the speed from the revolution times. The revolution times are determined after each pass-through of a segment relative to the sensor and the most current pass-through times of all segments are used for determining each revolution time. Since the time for a full revolution is calculated for each segment respectively, differences in the length of individual segments due to production do not have any negative influence on the calculation of speed. | 09-11-2014 |
20160018433 | SPEED SENSOR - A speed sensor ( | 01-21-2016 |
20180024158 | TURBOCHARGER ROTATION DETECTOR | 01-25-2018 |
324174000 | Permanent magnet type | 13 |
20080218156 | MAGNETIC ENCODER INCLUDING MAGNETIC RING HAVING ROUGHNESS - A magnetic encoder includes a metallic reinforcing ring and a magnetic ring attached to the metallic reinforcing ring, and is composed of a mixture of an elastic element and a magnetic material. A front side of the magnetic ring is formed into a roughly uneven surface having a roughness of Ra 0.2 to 10.0 or Ry 2 to 100.0. | 09-11-2008 |
20080246465 | Magnetoresistive Speed Sensor - In order to create a magnetoresistive speed sensor ( | 10-09-2008 |
20080309322 | Compact wheel speed detector capable of saving space and improving workability - A wheel speed detector for detecting a relative rotating speed between an outer ring and an inner ring by means of a magnetic sensor in association with a magnetic ring. A stationary seal member is fixed to the stationary ring and a rotatable seal member is fixed to the rotatable ring. The seal members engage to seal a gap between the inner ring and the outer ring. The magnetic sensor is fixed to a radial inner surface of the stationary seal member and the magnetic ring is fixed to a radial outer or a radial inner surface of the rotatable seal member and surfaces of the magnetic ring other than that fixed to the radial inner surface of the rotatable seal member are covered with a seal lip. | 12-18-2008 |
20090251133 | A Sensor Holder And A Wheel Bearing Apparatus Incorporated With A Wheel Speed Detecting Apparatus - A sensor holder has an encoder and a wheel speed sensor arranged opposite to the encoder, via a predetermined air gap. An annular fitting member is formed by pressing an anti-corrosive steel plate. A holding portion is formed of injection moldable synthetic resin and is integrally formed with the annular fitting member. The wheel speed sensor is embedded in the holding portion. At least a surface of the annular fitting member contacting the holding portion is roughened by shot blasting to have a surface roughness Ra of 0.8 or more. | 10-08-2009 |
20090256551 | Rolling Bearing With Rotational Speed Sensor - The object is to produce even an magnetic encoder having a large outer diameter at a low cost, provide a sensor case which is compact in size and can be easily mounted and dismounted with a sensor element received therein, and to provide a double row rolling bearing with a preload application means and a rotational speed sensor which comprises a small number of parts and thus can be assembled easily. | 10-15-2009 |
20090309576 | Speed Sensor Pick-Up for Fluid Device - A speed pick-up ring includes a main body having a plurality of targets and defining a plurality of notches. Each notch is disposed between adjacent targets. Each notch includes a base wall, a first sidewall and an oppositely disposed second sidewall. The base wall includes a convex portion. A fluid device includes a housing and a variable reluctance speed sensor engaged to the housing. The fluid device further includes a speed pick-up ring disposed within the housing. The speed pick-up ring includes a main body having a plurality of targets and defining a plurality of notches. Each notch is disposed between adjacent targets. Each notch includes a base wall, a first sidewall that is generally concave and an oppositely disposed second sidewall that is generally concave. The base wall includes a convex portion. | 12-17-2009 |
20090309577 | High temperature speed sensor - A gas turbine shaft speed sensor including a sensing coil comprised of a central conducting wire, the sensor and conducting wire is surrounded by a layer of mineral insulator and the mineral insulator is surrounded by a metallic, non magnetic, sheath. A sensing coil formed with this construction allows the high operating temperatures and is robust. | 12-17-2009 |
20100090686 | MAGNETIC ENCODER INCLUDING MAGNETIC RING HAVING ROUGHNESS - A magnetic encoder includes a metallic reinforcing ring and a magnetic ring attached to the metallic reinforcing ring, and is composed of a mixture of an elastic element and a magnetic material. A front side of the magnetic ring is formed into a roughly uneven surface having a roughness of Ra 0.2 to 10.0 or Ry 2 to 100.0. | 04-15-2010 |
20100156395 | METHOD AND APPARATUS FOR AMPLIFIED VARIABLE RELUCTANCE SPEED SENSOR - A method and system for measuring a characteristic of a machine is provided. The system includes a speed sensor including a housing, a variable reluctance sensor (VRS) mounted at least partially within the housing, and a digitization circuit electrically coupled to an output of the VRS. The digitization circuit is also mounted within the housing and is configured to convert a substantially sinusoidal output of the VRS into a digital output signal. | 06-24-2010 |
20110210719 | WHEEL SPEED DETECTING DEVICE - A wheel speed detecting device includes a countermeasure against the entrance of muddy water. An annular recess groove is provided in an outer circumference of an end portion of a hub on a sensor side. A cup-shaped flange portion extends from the sensor supporting member with the flange portion covering the annular recess groove while maintaining a predetermined gap T | 09-01-2011 |
20110260713 | IMPULSE TRANSMITTER AND METHOD FOR PRODUCING SAME - A pulse-type rotation speed transducer and a method for manufacturing the same are described. The pulse-type rotation speed transducer has, as inductive components, a central pole pin, a coil coaxially disposed as a pickup winding around the pole pin and measurement leads, a permanent magnet that is in effective connection with the pole pin, and a sleeve disposed coaxially around the pole pin and the coil. Spacers of an intermediate product ensure coaxial disposition in the context of testing cycles and measurement cycles, cavities within the sleeve being filled with a plastic compound in the context of the final product, accompanied by embedding of the components. | 10-27-2011 |
20130285647 | Self powered wireless system - Apparatus for a self-powered wireless transmitter system. One such system includes an inductor, a delay circuit, and a transmitter with an antenna. The magnet interacting with the inductor generates both power and a trigger signal. The inductor generates sufficient power for the transmitter to transmit a wireless signal corresponding to when the magnet interacts with the inductor. Precise timing is insured by the inductor being connected to the trigger input of the transmitter unit and the delay circuit adding a short delay to the signal from the inductor with the delayed signal connected to the supply voltage connection of the transmitter. The transmitter transmits the wireless signal upon being energized through the delay circuit. | 10-31-2013 |
20160084867 | SPEED SENSOR INTERFACE INCLUDING DIFFERENTIAL COMPARATOR - A sensor interface circuit for a vehicle includes a signal conditioning module having at least one raw sensor signal input, and at least one conditioned sensor signal output, and a differential comparator module including a differential comparator and an adaptable hysteresis module. The adaptable hysteresis module provides a first hysteresis magnitude to the differential comparator when a sensor signal is below a threshold and a second hysteresis magnitude to the differential comparator when the sensor signal is above the threshold. | 03-24-2016 |
324175000 | Including radiant energy detector | 2 |
20100181992 | DEVICE FOR MEASURING ANGULAR VELOCITY OF TIRE - A device for measuring angular velocity of a rotating tire, comprising a plurality (“m” pieces) of light reflection marks ( | 07-22-2010 |
20160018432 | Handheld Tachometer - The present invention is a handheld tachometer characterized in a unity body provided with a contact type tachometer, a non-contact type optical tachometer and a stroboscope such that the handheld tachometer can be used in different applications for measuring a machinery rotating speed. The handheld tachometer includes a unity body having one end provided with a contact shaft of the contact type tachometer and the other end provided with the non-contact type optical tachometer and stroboscope together with a display driver, a switch button and a set of function switch for controlling and switching an operational function. Thereby the handheld tachometer with multiply functions is ready to be used on different objects so as to achieve the convenience in measuring a machinery rotating speed in the most suitable manner and thus enhance the practical value. | 01-21-2016 |