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9018940 Bicycle rotation detecting device  
A bicycle rotation detecting device is provided with a first electrical connector, a second electrical connector, a rotation detecting circuit and an output part. The second electrical connector...
8836321 Motor speed detection apparatus and motor control apparatus  
The motor speed detection apparatus detects rotational speed of a motor. The apparatus includes an FG coil (21) and a magnet (22) to be relatively moved with rotation of the motor, the FG coil...
8659250 Management apparatus of a rotating motor and an annexed load during power loss  
A management apparatus is described of a rotating motor and a load during power loss; the apparatus comprises a first switching circuit coupled with the rotating motor and a controller of said...
8531182 Control system and method for providing position measurement with redundancy for safety checking  
A control system for use in safety critical human/machine control interfaces is described, more particularly a joystick type control system and particularly a joystick type control system...
8497672 Acceleration sensor  
The present embodiments provide an acceleration sensor, which enables highly accurate detection and has an extremely compact size. The acceleration sensor of the present embodiments is provided...
8339078 Apparatus and method for providing information relating to a motor  
This invention relates to an apparatus and method for deriving speed and position information for an electric motor. Apparatus for and a method of controlling a motor 100 are also disclosed. The...
8324887 Device for determining the rotational speed of a transmission shaft  
A device for determining the rotational speed of a transmission shaft (12). The device includes a rotational speed indicator (3) connected, in a rotationally fixed manner, to the transmission...
8260479 Modular software architecture for an unmanned aerial vehicle  
A method for developing software as a layered, segmented system having diverse functionalities, based on a software architecture and an aerial vehicle utilizing the software architecture are...
8183854 Measuring linear velocity  
An apparatus for measuring linear velocity of a movable element relative to a stationary element includes a magnetic element fixed in relation to the stationary element. A soft-magnetic yoke is...
8169214 Angular position sensor  
An angular position sensor and method that relies on a stationary circular array of Hall sensors and a rotatable circular array of magnets arranged about a common axis. A periodic and simultaneous...
8159173 Control device for controlling travel motor of vehicle  
A control device for a travel motor mounted to a vehicle has a resolver which works as a rotation-angle sensor. The control device has a RDC which calculates a rotation-angle output value φ based...
8111032 Indicating instrument for vehicle  
An indicating instrument for a vehicle includes a step motor including a field winding, a pointer, a stopper device for stopping the pointer, which is rotating in a zero-reset direction, at a...
8102139 Indicating instrument for vehicle  
An indicating instrument includes a step motor having a field winding, a pointer, a reduction gear mechanism having gears, a stopper device for stopping the pointer at a stopper position, a...
8018189 Motor drive apparatus  
The present invention provides a motor drive apparatus which improves a trade-off relation between a stable position detection and noise at its driving. A sensorless drive operation circuit...
7835630 Adaptive and reconfigurable system for DC motor control  
An integrated circuit for controlling a DC motor is disclosed. The integrated circuit includes at least one digital position and speed circuit (DPS) for providing measurements of speed, position,...
7378721 Chip on lead frame for small package speed sensor  
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...
7265538 Method and device for measuring the rotational speed of a pulse-activated electric motor based on a frequency of current ripples  
A method and a device for measuring the speed of a pulse-activated electric motor are described. According to this method, the motor is fully activated at time intervals to be determined for a...
7205759 Apparatus and method for determining an engine speed  
A removable sensor assembly for non-intrusively sensing instantaneous speed of an engine comprising a crankshaft having a respective end equipped with an externally accessible bolt, the removable...
7075290 Tachometer apparatus and method for motor velocity measurement  
A method and apparatus for determining the velocity of a rotating device is described herein. The apparatus includes a magnet assembly affixed to a rotating shaft of a rotating device and a...
6885186 Resonant circuit for increasing variable reluctance sensor output  
An apparatus and method for measuring a characteristic of a machine. A variable reluctance sensor (VRS) is coupled to the machine. A first switching device and capacitor, coupled in parallel with...
6876194 Linear velocity sensor and method for reducing non-linearity of the sensor output signal  
Linear velocity sensor and method for reducing non-linearity in the output signal of the sensor are provided. The sensor comprises a ferromagnetic housing including an opening. The sensor further...
6791217 Method and system for motor velocity measurement  
A method and system for determining the velocity of a rotating device is described herein. The system includes an apparatus with a set of sense magnets affixed to a rotating shaft of the rotating...
6784658 Signal generator for multi-cylinder internal combustion engine and rotation information detector using signal generator  
A signal generator for an internal combustion engine for obtaining precise information on a rotational direction of the engine when the engine runs at extremely low speed, comprising: a rotor...
6777925 Input circuit for inductive engine speed sensor  
A circuit for inputting and processing a signal from a speed sensor element, includes a comparator having first and second input terminals and first and second input circuits connected to receive...
6741058 Drive unit for initialization  
A drive unit for calibrating an indicator/meter of a vehicle is provided in which a pointer in an indicator for a vehicle can point immediately after an ignition switch is turned ON, and the...
6559632 Method and apparatus for determining linear and angular velocity of a moving body  
An apparatus and method for determining linear and angular velocity of a moving body. A magnet is attached or fixed to the body, the velocity of which is to be determined. The apparatus comprises...
6552531 Method and circuit for processing signals for a motion sensor  
The present invention relates to a method and a circuit arrangement for processing signals for an active motion sensor which generates at least one first sequence of input pulses that contain...
6541959 Angular position sensing system with magnet and rotor arrangement  
A sensing system for measuring the angular displacement of a rotating shaft is disclosed. The sensing system comprises a rotor and a sensor assembly disposed within the rotor. The rotor is...
6476605 Inductive sensor for target parameter detection and magnetic image feature determination  
Inductive sensor for non-contact detection of discontinuities of a conductive or ferromagnetic target for determination of target position, movement and speed, or generally of a magnetic image,...
6469500 Method for determining the position and/or speed of motion of a control element that can be moved back and forth between two switching positions  
The invention relates to a method for determining the position and/or the speed of motion of a control element which can be moved back and forth between a first and second switching position....
6268720 Method for determining the rates of motion and wheel for roller skates and skateboard  
A wheel for roller skates or roller boards, the wheel having a non-rotating axle of rotation and a wheel body rotatable around an axle of rotation, the wheel includes means for measuring the speed...
6208132 Non-intrusive speed sensing for induction motors  
A sensing coil affixed to the outside of an induction motor housing uses flux signals from the motor to measure motor speed. In particular, components of the rotor current are measured and...
6191550 Method and apparatus for detecting abnormality in rotation sensor  
In a rotation sensor having a resolver attached to a rotor and a signal processing unit for angle detection for supplying a reference signal having a predetermined periodic waveform to the...
6181127 Method and circuit for checking the width of the air gap in a speed sensor  
In the case of a method for checking the width of the measuring air gap of a magnetic speed sensor, square-wave output signals are generated from the measurement signals of the sensor by means of...
5986448 Revolving speed detecting device with reduced eddy current loss  
A revolving speed detecting device for use with a rolling contact bearing having a rotary ring and a fixed ring. It has a magnetic ring provided on the peripheral surface thereof with a plurality...
5893052 Method and apparatus for testing sensing system performance  
An apparatus and method for testing, for example, ABS systems in which a variable reluctance detector is positioned adjacent a ring of ferromagnetic teeth mounted on a wheel is provided. The...
5828210 X-ray tube anode drive speed monitor including flux pickup coil  
A method for monitoring a rotor speed of an X-ray tube anode drive includes acquiring axial flux pickup data from the rotor, using the axial flux pickup data to provide a flux spectrum, and...
5714941 Integral information and energy storage system  
An integral information and energy storage system is disclosed comprising a disk drive having a housing, a shaft rotatably mounted therein, and a disk platter coupled to the shaft. A flywheel is...
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...
5451867 Method and circuit configuration for conditioning the output signal of a rotational speed sensor  
A circuit configuration which serves to condition the output signal of a rotational speed sensor, e.g., the wheel sensor of an automotive vehicle. The circuit configuration includes a trigger...
5451870 Sensor for measuring the difference between the velocity of a cylinder and a piston in a dashpot  
A sensor for measuring the difference between the velocity and/or position of a vibration-suppressing cylinder and that of a piston connected to a piston rod and moving back and forth inside the...
5446375 Reluctance sensor having variable threshold detection circuit  
A reluctance sensor produces reluctance signals in response to passing slots in a rotating wheel. When a given signal exceeds a threshold, a DIG-- OUT signal is produced. When the signal falls to...
5396427 Method and apparatus for determining relative contributions of individual cylinders of internal combustion engine  
A linearly moving external part of a multi-cylinder internal combustion engine is contacted with a hand-held contact tachometer for producing a waveform signal which, along with a signal...
5260650 Method and apparatus for detecting low rotational speeds using a resolver  
A method and apparatus for generating a voltage (uDK) proportional to the rotational-speed uses a resolver (2), which outputs two path-dependent or angle-dependent, amplitude-modulated (AM)...
5237872 Angular velocity sensor  
An angular velocity sensor is provided with a spherical liquid inertia mass, preferably mercury, which can rotate with respect to a vessel in which it is contained. A magnetic field passes through...
5239490 Device for detecting rotation of rotary shaft and rotation controlling apparatus using the same  
This specification discloses inventions of a rotation detecting device for a rotary shaft and of a rotation controlling apparatus using this rotation detecting device. The rotation detecting...
5233293 Sensor for measuring the speed and/or position of a piston in relation to that of the cylinder it moves inside of in a dashpot or shock absorber  
A sensor for measuring the speed and/or position of a piston in relation to that of the cylinder it moves inside of in a dashpot of shock absorber for motor vehicles. The sensor consists of a...
5225749 System for controlling the rotational speed of a rotary member  
The present invention provides a system for controlling the rotational speed of a rotary member such as a video tape recorder drum or the like. The system detects a zero crossing interval in the...
5196793 Crankshaft position voltage developing apparatus having a voltage clamp  
An apparatus for developing a signal voltage that represents the angular position of the crankshaft of an internal combustion engine. The apparatus includes a variable reluctance sensor that has a...
5140305 Speed sensor failure detection method and apparatus for an overspeed protection system  
An apparatus for detecting speed sensor failure in an overspeed protection device is disclosed. The apparatus comprises a plurality of tachometers having outputs for indicating the speed of...

Matches 1 - 50 out of 148 1 2 3 >