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| Number | Title | Issue Date |
| 7340370 | Resolver signal processing device A resolver signal processing device includes a control portion, a resolver, and an input/output portion. The control portion includes a memory for storing sine wave data for two cycles, and a DMA controller for transmitting to the resolver the excitation signal incl... | 03/04/2008 |
| 7205761 | Rotation state detecting device and rotation state detecting method 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 c... | 04/17/2007 |
| 7132954 | Self monitoring pool cover system System and method for monitoring a working status of a swimming pool cover assembly. The system comprises a pool cover assembly operably connected to an alarm apparatus; both may be operably connected to a plurality of sensors capable of detecting a working status o... | 11/07/2006 |
| 7123998 | Automated transmission systems An automated transmission system includes a transmission brake which is used to apply a braking torque to the transmission, while the engine torque is negative and a transmission clutch is disengaged to effect a gear downshift, in order to avoid acceleration of the ... | 10/17/2006 |
| 7113104 | Giant magnetoresistance based gyroscope 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 ... | 09/26/2006 |
| 7084755 | Method and device for monitoring the region of technical rolling bodies The invention relates to a method for monitoring the area of technical rolling bodies, especially their supports, wherein the forces exerted in that area are detected with sensors in order to generate electrical energy and to detect changes in the state of the area.... | 08/01/2006 |
| 6940399 | Tire air pressure detection device for detecting air pressure based on vehicle speed signal A tire air pressure detection device includes an ideal driving status calculating portion (3e) and a rotational status value compensating portion (3f). The ideal driving status calculating portion calculates an ideal status value (βid) c... | 09/06/2005 |
| 6940277 | Giant magnetoresistance based nanopositioner encoder An encoder (10) for a nanopostioner (24) includes a strip of magnetic bits (18) for producing discrete magnetic fields and a giant magnetoresistor (GMR) (14) which changes in electrical resistance in response to changes in the magnetic fi... | 09/06/2005 |
| 6859139 | Control apparatus for controlling motor drive A control apparatus controls a drive of a motor having a movable part via an electric power converter. The control apparatus includes a detecting device for detecting a position of the movable part of the motor; a locking device for locking the movable part of the m... | 02/22/2005 |
| 6768418 | Tire air pressure detection device for detecting air pressure based on vehicle speed signal A tire air pressure detection device of the present invention includes a warning anticipation timing calculating portion for anticipating a warning timing at which tire air pressure decrease detecting portion will detect the tire air pressure decrease based on rotat... | 07/27/2004 |
| 6747553 | Apparatus for detecting rotational state of wheel Provided is rotational-state-of-wheel detecting apparatus that can avoid output of an incorrect rotational direction during a halt of a wheel. In ECU 10, a signal input section 10a accurately detects wheel speeds and rotational directions of res... | 06/08/2004 |
| 6741170 | Apparatus for monitoring rotation of an object about an axis A sensor (36) for monitoring rotation of an object (16) about an axis (20) comprises a switch member (40) that is urged into a neutral position and is movable relative to the object (16). A direction of movement of the switch membe... | 05/25/2004 |
| 6737979 | Micromechanical shock sensor The invention comprises a micromechanical shock sensor that is formed on the surface of a micro-substrate. A moveable proof mass is formed on the surface with at least one spring connected to the proof mass and the surface. The spring allows the proof mass to move a... | 05/18/2004 |
| 6693548 | Structural monitoring system for helicopter rotor components A system for monitoring the structural condition of a helicopter rotor assembly component includes a piezoelectric sensor. Acoustic emission signal techniques allow for recognizing the relatively high frequency stress waves associated with the propagation... | 02/17/2004 |
| 6690285 | Agricultural implement component rotation alarm A forage harvester represents agricultural implements that include at least one rotating component which is driven through a drive train including a main clutch operable between engaged and disengaged conditions so as to selectively couple and disconnect ... | 02/10/2004 |
| 6441745 | Golf club swing path, speed and grip pressure monitor The golf club has a head and a shaft. A three axis linear accelerometer is mounted on the shaft adjacent to the head. The axis of one accelerometer is in parallel alignment with an axis of the shaft. A circuit board is attached to the shaft and the accele... | 08/27/2002 |
| 6323779 | Displacement sensing apparatus A pedal stroke sensor a rotor that rotates with a brake pedal with a pair of brushes fixed on the rotor. The brushes are inclined oppositely to each other along rotating direction of the rotor and contact a circuit printed on a circuit board to generate o... | 11/27/2001 |
| 6304190 | Method for determining the absolute angular position of the steering wheel of a motor vehicle, and optoelecronic steering angle sensor A method of determining the angular position of the steering wheel of a motor vehicle using an optoelectronic steering angel sensor includes disposing a code transmitter between the light source and the line sensor. The line sensor has image points positi... | 10/16/2001 |
| 6242905 | Method for identifying the direction of rotation of a wheel using hall probes A method of identifying a direction of rotation of a wheel using Hall probes which are disposed about the circumference of the wheel. In this case, a first, a second and a third Hall probe are disposed successively, so that the second Hall probe lies betw... | 06/05/2001 |
| 6229299 | System and method for computing the angular velocity and direction of a rotational body A sensor is positioned to sense the magnetic field strength of a magnet associated with a rotating body. The sensor produces a signal having a sinusoidal output as the magnet rotates with the rotating body. A controller takes a derivative of the output an... | 05/08/2001 |
| 6208131 | Electronic position and speed sensing device A position and speed sensor comprising a circular element (1) rotatably driven about its axis. The circular element (1) has two position indicators (3, 4) of different angular width. A sensor means (5) is fixed in position with respect to and adjacent to ... | 03/27/2001 |
| 6181235 | Rotary apparatus A rotary apparatus in which at least one electrically controlled device is attached to a rotor. The rotor carries coils such that rotation of the rotor generates power for the device. A switch is provided for controlling the supply of power to the device ... | 01/30/2001 |
| 6058358 | Device for direction of rotation recognition and plausibility testing in absolute angular position measuring devices especially with serial transmission of actual positions detected A first value (V), which corresponds to the angular units covered during two actual position values successively transmitted via the data transmission link at the maximum rotational speed of the encoder shaft (W), and a second value (D) which corresponds ... | 05/02/2000 |
| 6044791 | Apparatus for determining the position of a rotary valve A position indicator for a rotary valve actuator has a stator of one color mountable on a housing for the actuator and a rotor of a contrasting color which is connected to the actuator output shaft for rotation with it. The rotor has inner and outer coaxi... | 04/04/2000 |
| 6002338 | Method and system for detecting failures in self-exciting sensor A method and system for detecting faults with a self-exciting sensor includes a monitor circuit coupled to the self-exciting sensor for monitoring a signal associated with the sensor and generating a failure signal. A voltage limiting circuit is coupled t... | 12/14/1999 |
| 5986559 | Infinitely adjustable position sensor with visual confirmation An infinitely adjustable position sensor is provided. The position sensor can be used as a head position switch which generates an output indicative of a position of a harvesting head of a harvesting vehicle, or in similar applications with other types of... | 11/16/1999 |
| 5982279 | Tire air pressure detecting device To accurately detect a resonance frequency of tire even in high speed range by which tire air pressure state of each wheel is known, a calculation processing unit to which detection signals of wheel speed and resonance frequencies of tire are inputted cal... | 11/09/1999 |
| 5977765 | Speed, direction, and acceleration sensor for a rotating shaft having a rotor with teeth having unequal spacing An apparatus is provided to determine the speed and direction of a rotating shaft, including a rotor with three circumferentially spaced teeth connected to the shaft. The spacing of the center of the second rotor tooth is wider than the spacing of the cen... | 11/02/1999 |
| 5644224 | Dual brushless resolver rate sensor A resolver rate sensor is disclosed in which dual brushless resolvers are mechanically coupled to the same output shaft. Diverse inputs are provided to each resolver by providing the first resolver with a DC input and the second resolver with an AC sinuso... | 07/01/1997 |
| 5610577 | Automobile front-wheel orientation and turning-angle indicator An automobile front-wheel orientation and turning-angle indicator is arranged at the center of the steering wheel to indicate the orientation and turning-angle of the front-wheel. The indicator comprises a rotating disk, a scale disk, an indicator disk, a... | 03/11/1997 |
| 5523679 | Apparatus for detecting speed and direction of rotation with a single magnetic sensor The invention relates to a process and apparatus for detecting the speed and rotary direction of a rotary drive by using a signal-transmitting or signal-changing element which is connected rotationally secured to the rotary drive. According to the inventi... | 06/04/1996 |
| 5500585 | Device for detecting the speed and direction of a movable component using a single signal line A device for detecting the movement of a movable component in that the position signals furnished by two position sensors are added to a signal that is conducted through a signal line to an evaluation arrangement. The position ranges associated with the p... | 03/19/1996 |
| 5471202 | Rotation sensing device for detecting a fine displacement of a handle and control system in electrical power steering device A rotation sensing device for detecting a fine displacement of a handle and control system for use in an electrical power steering device in vehicles and a motor driving device in industrial machines. The rotation sensing device has a fixing member with a... | 11/28/1995 |
| 5446376 | Sensing motor speed and rotation direction The present invention features a method and an apparatus for sensing the speed and the direction of rotation of a motor. The apparatus of the invention has a timing wheel disk that is attached to the rotational shaft of a motor and has a number of slots. ... | 08/29/1995 |
| 5428964 | Control for air quality machine A multi-functional room air conditioning unit that controls both heat and humidity as well as the concentration of airborne particulates. A control unit monitors temperature, humidity and air quality parameters and automatically programs the apparatus to ... | 07/04/1995 |
| 5371460 | Speed and direction sensor for a rotating shaft having a rotor with teeth of alternating widths An apparatus for determining the speed and direction of a rotating shaft is provided. The apparatus includes a rotor connected to the shaft. The rotor has a plurality of teeth of alternating widths. The apparatus detects the teeth and responsibly determin... | 12/06/1994 |
| 5345171 | Apparatus including a selectively connectable isolation transformer for determining the speed and direction of a rotating object In one aspect of the present invention, an apparatus determines the rotational speed and direction of a rotating object. The apparatus includes a sensor adapted to detect the speed and direction of the rotating object and responsively produce a frequency ... | 09/06/1994 |
| 5287742 | Device for detecting defects of web A plurality of probes 3 or 10 are arranged in a conveying path of a web 1 or 9 comprising a slit sheet or a nonwoven fabric for contact with the web 1 or 9. The probes 3 or 10 are rotatably supported and arranged so that if a defect portion exists in the ... | 02/22/1994 |
| 5264789 | Method of determining the direction of rotation of a member using a rotor having a predetermined pattern of exciter surfaces A method of determining the direction of rotation of a member (17) is closed, wherein the member has a speed pick-up rotor (27) having a plurality of teeth or exciter surfaces (29). The rotor has a predetermined pattern of gaps (37,73) and groups of teeth... | 11/23/1993 |
| 5248939 | Apparatus for sensing the direction and speed of a steering wheel shaft using Hall effect sensors in a detachable sensor mounting A bearing on a steering shaft has an elongated inner race and an elongated outer race with rolling elements between the two races. The inner race is rotatable with respect to the outer race. An encoder is mounted on the inner race. Sensors in a detachable... | 09/28/1993 |
