Class / Patent application number | Description | Number of patent applications / Date published |
073862193 | By measuring an electrical or magnetic characteristic of a torque delivering electric motor | 31 |
20080307900 | Self-contained wireless rotational speed sensing unit - A speed sensing device for use with a traction device is disclosed. The speed sensing device has a rotor having a first rotational, wherein the rotor has magnets affixed thereon to generate a magnetic field. The speed sensing device also has a power-harvesting circuit coupled with the rotor to convert fluctuations in the magnetic field into electrical energy. The speed sensing device further has a sensor having a second rotational speed different from the first rotational speed, wherein the sensor is powered by the power-harvesting circuit to generate a signal indicative of a speed of the traction device. The speed sensing device still further has a transmitting circuit connected with the speed sensor and powered by the power-harvesting circuit to wirelessly transmit the generated signal. | 12-18-2008 |
20090056474 | Electric power steering system - In an electric power assisting system for a vehicle, a control unit receives an input shaft rotation angle detected by an input shaft rotation angle sensor and an output shaft rotation angle detected by an output shaft rotation angle sensor. The control unit controls rotation of a motor based on the detected two rotation angles. The control unit differently controls the rotation of the motor whether torque is applied from a steering wheel side or from a road surface side. | 03-05-2009 |
20090107259 | Torque Detecting Device - A magnetic shield made of magnetic material in the shape of a thin cylinder is externally fitted and fixed on a cylindrical mold member holding magnetic flux collecting rings so that it has extended sections with appropriate length on both sides in the axial direction, and therefore magnetic noise from outside in the radial direction is shielded directly by the outer surface of the magnetic shield, magnetic noise from both sides in the axial direction is shielded by concentrating the magnetic noise on the end faces of the magnetic shield, and the influence on the magnetic flux collecting rings held in the mold member is eliminated. | 04-30-2009 |
20090217774 | Torque sensing apparatus - There is described an apparatus for providing rotary displacement information indicative of the torque applied to a torsion bar which is rotatable relative to a housing, in which the electromagnetic coupling between a transmit aerial fixed relative to the housing and a receive aerial fixed relative to the housing varies in dependence upon first and second resonators fixed to the torsion bar at spaced axial positions. The first and second resonators have respective different resonant frequencies to enable the signal coupled between the transmit aerial and the receive aerial via the first resonator to be distinguished from the signal coupled between the transmit aerial and the receive aerial via the second resonator. | 09-03-2009 |
20100018328 | Magnetic torque/force transducer - A torque transducer utilizes a ferromagnetic region ( | 01-28-2010 |
20100186522 | Monitoring System For A Hybrid Drive - The invention relates to a method for the continuous torque monitoring of a hybrid drive composed of an internal combustion engine with an engine control unit and an inherently safe electric drive with a control unit, wherein a permissible total torque is compared with the sum of an actual torque of the electric drive and an actual torque of the internal combustion engine. If the permissible total torque is reduced by the actual torque of the electric motor and is formed by a permissible torque of the internal combustion engine, it is largely possible by means of this method for existing software to be utilized further, and said software need not be amended. In the engine controller, it is largely possible for calculations to be carried out with torques which are normalized to the maximum torque of the internal combustion engine. In the comparison stage in particular, the value range of the torques in the case of a hybrid drive in relation to that in the case of a pure internal combustion engine is maintained. Storage-space-saving and calculation-duration-saving programming is therefore possible. | 07-29-2010 |
20110000319 | Torque sensor - In a torque sensor that detects torque acting on a torsion bar in accordance with the density of magnetic flux guided to a rotating magnetic circuit portion from a magnetism generating portion, the magnetism generating portion includes a back yoke that rotates together with a first shaft, a ring magnet joined to the back yoke, and an adhesive that is interposed between the back yoke and the ring magnet to join the two, and the adhesive includes a rotation-stopping projecting portion that engages with a rotation-stopping recess portion formed in the back yoke to function as a latch for stopping relative rotation between the back yoke and the ring magnet when an adhesion portion thereof adhered to the back yoke peels away. | 01-06-2011 |
20110005340 | CONTACTLESS TORQUE SENSOR FOR STEERING SYSTEM - The present invention relates to a contactless torque sensor for steering system which is installed between an input shaft connected to a steering wheel and an output shaft connected to vehicle wheels and detects torsion generated by rotational manipulation of the steering wheel. The torque sensor comprises a magnetism generation unit coupled with the input shaft wherein north and south pole magnets are arranged along an outer circumference, a cylindrical magnetic shielding unit connected to the output shaft and comprising holes placed near the magnets, a magnetic detection unit distanced from the outer circumference of the magnetic shielding unit and detecting magnetism passing through the holes, and a magnetic detection sensor placed on an outer circumference of the magnetic detection unit and detecting torsion of the magnetism generation unit and magnetic shielding unit. The present invention allows detecting torque of the output shaft with magnetism induced only once. | 01-13-2011 |
20110126639 | Sensor system for ascertaining a torque and for index detection - A torque sensor system having an index function and ascertaining a torque between an input shaft and an output shaft connected to each other via a torsion bar, includes: a magnetic unit having a magnetic pole wheel for generating a magnetic field, the magnetic unit being rigidly connected to one of the two shafts; a flux ring unit having a flux ring system for converting and conducting the magnetic flux generated by the magnetic unit, the flux ring unit being rigidly connected to the other shaft; and a sensor unit having at least one first magnetic field-sensitive sensor element for sensing changes in the magnetic flux through the flux ring system, the sensor unit being mounted in a stationary manner relative to the flux ring unit. The index function is implemented with the aid of an index magnet and a further magnetic field-sensitive sensor element. | 06-02-2011 |
20110308331 | Speed or torque probe for gas turbine engines - There is provided a variable reluctance sensor for sensing the speed or torque of a shaft in a gear box or gas turbine engine, comprising a magnetic pole piece a conductive wire wrapped around the pole piece a housing surrounding the pole piece, the housing having a front face and at least one side wall, wherein, in use, the front face is positioned proximate to an object to be sensed wherein the pole piece is rigidly fixed to the side wall of the housing. This arrangement reduces microphony in the sensor. | 12-22-2011 |
20120031202 | TORQUE SENSOR - An excitation AC signal biased by a predetermined DC voltage is applied to a coil to allow a DC voltage component in a coil output signal to contain failure information about disconnection, partial disconnection, or the like of the coil. The DC voltage component contained in the coil output signal is detected, and the detected DC voltage is provided as an offset voltage for a failure diagnosis. Further, to check a peak level of the excitation AC voltage, a DC voltage corresponding to the peak level may be contained in the offset voltage. A differential amplifier circuit for obtaining a difference between a coil detection output AC voltage component and a reference AC voltage component outputs an obtained differential signal offset by the offset voltage. Accordingly, the differential signal containing the offset voltage as the failure information is transmitted to a circuit for torque measurement as a torque detection signal via a single output line. The circuit for torque measurement provides the torque detection data based on the transmitted differential signal and at the same time extracts the offset voltage to use it for the failure diagnosis. | 02-09-2012 |
20120279320 | MAGNETIC FLUX COLLECTOR FOR A TORQUE DETECTION DEVICE - The invention relates to a magnetic flux collector for a torque detection device. The collector includes two coaxial magnetic cylinder heads ( | 11-08-2012 |
20120297895 | Magnetic Torque Sensor Packaging for Automatic Transmissions - Designs to package a magneto-elastic torque sensor in an automotive transmission, such as front wheel drive (FWD) automatic transmissions, for volume production applications are provided. | 11-29-2012 |
20120325020 | Sensor system for combined speed-torque detection - A sensor system having at least two phase tracks spaced apart in the axial direction of a rotation axis of a rotating body and situated circumferentially around it, having at least one sensor element for each phase track situated fixed in place opposite the rotating body to detect the particular phase track. At least one first sensor element assigned to a first phase track, with at least one second sensor element assigned to the first phase track, is connected to at least one first sensor element bridge, extending parallel to the first phase track and perpendicularly to the rotation axis of the rotating body, and at least one sensor element assigned to a second phase track, with at least one sensor element assigned to the first phase track, is connected to at least one second sensor element bridge extending perpendicularly to the two phase tracks and parallel to the axis. | 12-27-2012 |
20120325021 | LOAD WEIGHT DETERMINING APPARATUS AND LOAD WEIGHT DETERMINING METHOD FOR ELECTRIC CHAIN BLOCK - A load weight determining apparatus and method for an electric chain block having a lifting-lowering motor and an inverter controller. The lifting-lowering motor rotates a sheave to wind up and unwind a chain engaging the sheave. The load weight determining apparatus has a current detecting element detecting a motor current supplied to the lifting-lowering motor from the inverter controller, and a load weight determining unit. A torque current is calculated from the motor current detected by the load weight determining unit, and a variation cycle of the torque current is calculated. An average torque current value over a period of time corresponding to the variation cycle is calculated, and the average torque current value is compared with a set threshold to perform load weight determination. | 12-27-2012 |
20130145865 | TORQUE DETECTION APPARATUS - A first excitation AC signal (V | 06-13-2013 |
20130160569 | TORQUE SENSOR - A torque sensor includes a driving rod, a driving body connected fixedly to the driving rod, and a driving block extending from the driving body and having two opposite pushing surfaces, a driven body permitting the driving body to rotate relative thereto as a result of application of a torque to the driving rod, a driven rod extending from the driven body, and a block-receiving groove formed in the driven body. A first measuring module is connected to the driving block. A second measuring module is connected to the driven body, and cooperates with the first measuring module so as to measure the torque. Two resilient members flank the driving block. Each of the resilient members is disposed between and abuts against the corresponding pushing surface and the driven body. | 06-27-2013 |
20130167660 | TORQUE SENSOR ARRANGEMENT HAVING AN INDEX MAGNET - A sensor arrangement including a torque sensor for sensing the torque acting on a shaft. The torque sensor shaft includes two shaft segments, wherein a magnetic encoder is disposed on the first shaft segment and a stator packet is disposed on the second shaft segment, the stator packet having at least two magnetically conductive stator elements conducting the magnetic field generated by the magnetic encoder of the first shaft segment and guiding the field directly or indirectly to one or more magnetic field sensor elements for sensing the torque. An angle of rotation index unit detects and/or identifies the angular position of the shaft with respect to a defined angle of rotation and/or a defined range of angle of rotation. The angle of rotation index unit includes an index magnet attached to a carrier. The carrier connected to the magnetic encoder or at least to one of the stator elements. | 07-04-2013 |
20140123770 | TORQUE MEASUREMENT DEVICE - Provided is a torque measurement device including a stator in which a space portion is formed by a first annular ring and a second annular ring having protrusion pieces, a ring-shaped magnet disposed in the space portion, and a collector assembly including a first collector member and a second collector member to form at least one insertion space in which a magnetic element is disposed, wherein the insertion space is formed by bending an end of the first collector member and an end of the second collector member toward the space portion. | 05-08-2014 |
20140130612 | TORQUE SENSOR - A torque sensor has a magnetic sensor, which is composed of a first magnetic detecting element, a second magnetic detecting element and a comparator. The first magnetic detecting element outputs an output signal of a provisional detection value, while the second magnetic detecting element outputs an output signal of a reference value. The comparator compares the provisional detection value and the reference value and outputs the provisional detection value as an authorized detection value, when a difference value between the provisional detection value and the reference value is smaller than a predetermined threshold value. | 05-15-2014 |
20140174202 | TORQUE DETECTOR AND STEERING SYSTEM INCLUDING THE TORQUE DETECTOR - A torque detector includes: a magnetic flux collecting unit including a magnetic flux collecting holder formed in an annular shape by resin molding and a magnetic shield formed by bending a metal plate and attached to an outer peripheral face of the magnetic flux collecting holder; and a sensor housing formed integrally with the magnetic flux collecting unit. The magnetic shield has a shield body, a shield end portion, and a bent portion. A second angle formed between an outer side face of the shield end portion and a radial direction is smaller than a first angle formed between an outer peripheral face of the shield body and the radial direction. | 06-26-2014 |
20140230570 | Magnetic Sensor Packaging for Transmissions - Designs to package a magneto-elastic torque sensor in an automotive transmission for volume production applications are provided. One transmission includes an output shaft and a magnetic torque sensor. The output shaft has a magnetized region. The sensor, for detecting torque of the output shaft, is mounted on friction reduction members such as bushings supporting the output shaft. In another transmission, the sensor is alternatively mounted to a transmission case. | 08-21-2014 |
20140283623 | Torque Sensor For Measuring Torsion Of Steering Column And Measurement Method Using The Same - A torque sensor is provided and includes a rotor and stator. The rotor includes a plurality of magnet, while the stator includes a plurality of teeth respectively corresponding to the plurality of magnets. A magnetic flux is provided by the plurality of teeth and the plurality of magnets and flows in one direction. | 09-25-2014 |
20140290386 | TORQUE MEASUREMENT DEVICE FOR STEERING WHEEL - A measuring device for steering wheel torque includes a magnetic sensor to measure a rotational torque of the steering wheel. The measuring device for steering wheel torque has the advantages of high measuring precision, non-contact, high reliability and low cost. | 10-02-2014 |
20150033877 | TORQUE DETECTING DEVICE AND ELECTRIC POWER STEERING SYSTEM - A torque detecting device includes a permanent magnet; a first magnetic yoke; a second magnetic yoke; two magnetic elements; a terminal; a case; and an external housing. The two magnetic elements are electrically connected to the terminal. The case accommodates the two magnetic elements and the terminal. The external housing accommodates the permanent magnet, the first magnetic yoke, and the second magnetic yoke, covers an outer side surface of the case, and is formed integrally with the case. | 02-05-2015 |
20150053024 | TORQUE MEASURING APPARATUS USING MAGNETIC BODIES - Provided is a torque measuring apparatus using magnetic bodies, the torque measuring apparatus including: an input link whose one end is connected to a driver and rotated in one direction by the driver; a first displacement sensor disposed at the other end of the input link, and controlling rotation displacement of the input link and the driver; a plurality of first magnetic bodies connected to the input link via a connection member and rotating in the one direction; a plurality of second magnetic bodies disposed between the plurality of first magnetic bodies; an output link supporting the plurality of second magnetic bodies and rotated by the pluralities of first and second magnetic bodies, wherein the plurality of second magnetic bodies are disposed inside the output link; and a second displacement sensor closely disposed to one surface of the output link and measuring rotation displacement of the output link. | 02-26-2015 |
20150090051 | Torque Index Sensor - A torque index sensor according to an embodiment of the present invention includes a rotor rotating with the first shaft which is one of an input shaft and an output shaft having a first magnet on an outer circumferential surface thereof, a stator disposed on an outer side of the first magnet and rotating with the second shaft which is the other of the input shaft and the output shaft, a shield disposed on a lower side of the stator and rotating with the second shaft and a second magnet combined with a lower side of the shield and rotating with the second shaft. The torque index sensor shields magnetic field interference and improves operational reliability. | 04-02-2015 |
20160138983 | TORQUE STEERING ANGLE SENSOR - A torque steering angle sensor is provided. The sensor includes a ring magnet with magnetic poles, magnetic path forming members to vary in location relative to the magnetic poles depending on torsion of a torsion bar, one pair of magnetic flux collecting rings for the magnetic path forming members, a first detecting element to detect a magnetic field between the flux collecting rings, a second detecting element to receive a magnetic field from the ring magnet, a slide magnet for producing a magnetic field in a different direction from that of the magnetic field of the ring magnet in the second detecting element, and a sliding mechanism to move the slide magnet toward or apart from the second detecting element with rotation of a rotary member of an electrically assisted power steering device. The second detecting element detects the magnetic fields received from the ring magnet and the slide magnet. | 05-19-2016 |
20160153851 | Magnetic Sensor Packaging for Transmissions | 06-02-2016 |
20160377495 | TORQUE DETECTING SYSTEM - A torque detecting system is adapted to detect a setting torque of a torque providing apparatus. A torque driving apparatus is mounted on a stationary base to exert a resisting force on the torque providing apparatus. The setting torque of the torque providing apparatus corresponds to the resisting force. The torque detecting system comprises an angle detecting module and an operation device. The angle detecting module is mounted on the torque driving apparatus and outputs a detecting voltage. The operation device obtains a torque value via table-searching based on the detecting voltage. The torque value corresponds to the setting torque of the torque providing apparatus. The torque detecting system performs the torque detection through a non-contact detecting technique, such that detecting accuracy would not be affected after long term use. | 12-29-2016 |
20180024018 | ROTOR, AND TORQUE SENSOR AND ELECTRONIC POWER STEERING SYSTEM INCLUDING THE SAME | 01-25-2018 |