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7369063 |
Encoder signal processing circuit including a direction determining/counting unit
An encoder signal processing circuit includes: a plurality of detectors adapted to generate signals with different phases; a switching circuit adapted to alternatively select and output a signal...
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6999006 |
Rotation position detecting device
A rotation position detecting device includes an angular signal generator which generates pulses the cycle period of which is even or equal when a rotating object rotates at a constant rotation...
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6967595 |
Input method of encoder signals
The present invention relates to an input method of encoder signals, and more particularly, to an input method of encoder signals which senses encoder signals by setting a predetermined signal...
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6696984 |
Apparatus and method for sensing rotary switch handling direction of monitor
An apparatus and method for sensing a rotary switch handling direction of a monitor is disclosed, in which a simple configuration can be obtained and accuracy in sensing a handling direction can be...
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6541760 |
Rotation detecting apparatus detecting rotation operation by light transmission to prevent invalid detection
A rotating body has paired anchoring projections and small projections projectingly disposed on one side thereof. On a shutter plate are formed guide holes in which the paired anchoring projections...
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6525675 |
Position encoder for determining the angle or position and the total angle on distance moved
An angular position/position encoder is provided for determining the position of a moving part through evaluation of the direction-specific changes in the measured values recorded and for serial...
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6507292 |
Positional encoder assembly
A positional encoder assembly including a positional encoder, an interface unit releasably connectable with the positional encoder for connecting the positional encoder with a data bus, and...
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6430479 |
Methods, apparatus and computer program products for determining the vertical speed of an aircraft
A method, an apparatus and a computer program product are provided for accurately determining the vertical speed of an aircraft in a manner independent of signals provided by an air data computer,...
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6323786 |
Absolute-value encoder device
An absolute-value encoder device for detecting a plurality of rotation quantities is disclosed. An A/B phase forming portion 610 forms an A-phase pulse signal and a B-phase pulse signal, based on...
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6300884 |
Method for decoding a quadrature encoded signal
A method of decoding a quadrature encoded signal where position tracking is implemented which decouples the position calculations from the encoder edges. In one embodiment of the present invention,...
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6246343 |
Increment encoder failure detection
An error detection method for use with a two channel increment encoder. The error detection method operates to detect errors over a wide range of rotational velocity of a rotating member. The error...
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6058358 |
Device for direction of rotation recognition and plausibility testing in absolute angular position measuring devices especially with serial transmission of actual positions detected
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6043483 |
Apparatus and method using an indexed-encoder to sense the absolute position of an object with a single set of optics
An apparatus and method for detecting the absolute position of a movable member, by monitoring the incremental and directional of movement of an indexed-encoder, coupled to the movable member, and...
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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...
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5774068 |
Absolute signal detecting method and absolute encoder
A code plate has an m-bit signal track read out in parallel for providing the starting position of an AC servo motor for commencing rotation when power is first turned ON. An n-bit signal track...
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5663933 |
Meter circuit
The present invention relates to an electronic meter circuit for a time comparison measurement between two successive periodic events with which the signal time ratios between two times two...
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5608394 |
Position detecting method and apparatus
A position detecting apparatus and method of determining the detected position utilizing a motor driven incremental encoder to provide a signal indicative of a plurality of reference points and a...
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5602544 |
Absolute encoder and method of generating its current position
An absolute encoder which is operative to provide a plurality of signals indicating a current position, that signal including a least significant bit whose edge is detected and used as a basis for...
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5537322 |
System and method for determining a gradient speed of a shaft driven by an internal combustion engine
In a system and a method for determining the speed gradient dn/dt of a shaft of an internal combustion engine, the speed gradient dn/dt is determined as a function of the third power of the speed...
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5461375 |
Forward/backward counting device
The present invention relates to a forward/backward counting device intended for providing an absolute address of N bits in binary code, the address enabling the position of an object to be deduced...
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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...
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5264844 |
Apparatus for detecting rotational angular position for internal combustion engine
An apparatus for detecting the angular position for an internal combustion engine is capable of accurately detecting the angular position by a simple structure without being influenced by changes...
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5257024 |
Search position encoder
The search position encoder includes a generally planar medium, a search probe and a device for moving the probe generally parallel to the surface of the planar medium, and indexing device for...
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5239297 |
Position-encoded screw and method and system for calibrating a position-encoded screw
A position-encoded screw, and a method and system for calibrating a position-encoded screw. In one embodiment, the screw includes a threaded portion and a set of position-encoding marks arranged...
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5200683 |
Method for optimizing sampling rates for position tracking for motion control systems
An auxiliary resolver position tracking (RPT) system for an industrial robot includes a resolver excitation and monitoring system which is powered by an uninterruptable power supply which includes...
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5187479 |
Backlash compensation circuit for use with an incremental encoder
A circuit compensates backlash of a shaft on an incremental encoder having a quadrature and index pulse output lines. Quadrature is represented as two signal lines phased apart by 90 degrees and an...
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5012239 |
High resolution position sensor circuit
A resolution enhancement circuit comprises a voltage divider used to add multiples of two position representing quadrature signals into a plurality of adder output signals having zero crossings...
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5007057 |
Power source monitor and a rotary encoder with such a monitor
A rotary encoder which serves to generate absolute position data is outfitted with a power source monitor which generates, during a power interruption, an alarm signal which invalidates all...
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4982189 |
Encoder with wide index
An improved encoder for indicating angular position or rotation of a shaft, and particularly a digital encoder for use with materials handling vehicles, includes an index mark in an index band of...
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4922176 |
Electronic absolute coordinate encoder for positional control devices
An electronic absolute coordinate encoder for positional control devices which includes an encoding section, a detector section, a counter section and a backup power source. The encoder can detect...
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4918443 |
Method for determining a rotational angle of a rotary body
For the purpose of knowing an angular position and a rotational speed of a rotary body, according to an encoding pattern on an encoder mounted to and synchronously rotated with the rotary body,...
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4892312 |
Operating device for TV game machine
An operating device for inputting the coordinate positions of a controlled object that moves across a screen. The present invention is directed to obviating the problems of the prior art involving...
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4864300 |
Rotating high-resolution shaft encoder utilizing capacitive sensing
A high-resolution shaft encoder and a related encoding method for accurately measuring angular position and velocity of rotating shafts. The high-resolution shaft encoder includes an annular-shaped...
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4831376 |
Optical analog-to-digital converter and transducer
The present invention relates to an optical laser analog-to-digital (A/D) converter and the use of such a converter as a transducer. In a first embodiment of the invention, the converter consists...
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4829248 |
Hall effect sensing apparatus and method
Reproducability in the manufacture of rotating shaft sensing encoders and similar devices employing Hall effect switching devices to sense changes in magnetic fields is achieved in the present...
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4811254 |
Displacement detector for an encoder
An absolute displacement detector utilizing two sensors and a code bearing track having domains arranged such that relative movement between the sensors and the track produces two signals in phase...
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4780703 |
Rotary encoder apparatus
A rotary encoder apparatus of an incremental-type construction, including: a rotary unit mechanically joined to a movable machine; a unit for outputting at least two signals having a phase shift...
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4774494 |
Position encoder employing three or more colors
An incremental position encoder comprising a first member arranged for movement with a second member the movement of which is to be monitored, a plurality of light transmissive or reflective...
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4737710 |
Hall-effect array for sensing second spatial derivative of magnetic field
Hall-effect position sensor apparatus is disclosed which senses the position of a moving body and provides an output signal indicative of the position of the moving body. The apparatus includes a...
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4694279 |
Vector electronic control device
An electronic control device for providing control signals having direction and magnitude represented by electrical output signals based upon employing a circuit that senses relative changes in...
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4644157 |
Optical rotation detecting apparatus
An optical rotation detecting apparatus for a bushless dc motor detects rotation information of the shaft by the slits arranged at equal pitches along the circumference of a rotary disk and a...
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4630928 |
Length measuring device
In a length measuring device with a measuring transducer system, the curve of two sinusoidal test signals is dependent on the longitudinal movement of the measuring transducer system. An...
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4623831 |
Rotor position sensing apparatus for motors
A pulse encoder (2) is provided for generating a position code IP corresponding to the rotational position of a rotor of a motor (1), as well as rotation pulses AP, BP each of which is produced...
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4607956 |
Position detecting apparatus
A position detecting apparatus provided with a photosensor for optically detecting the scale pattern of an optical scale which moves together with the optical head of the optical disk instrument,...
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4603238 |
Fast indexing encoder apparatus
A rotatable cylinder having a plurality of drivers mounted therein for axial movement with each driver having a projection thereon extending through openings in the cylinder to engage rotatably...
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4599600 |
Conversion of quadrature signals into counter control pulses
A method and apparatus for conversion of quadrature signals into counter control pulses including count and direction pulses. The method includes the steps of determining the relative states of the...
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4597081 |
Encoder interface with error detection and method therefor
An optical encoder interface and method provides encoder position information and performs error checking on each revolution of the encoder. Error checking is achieved by ascertaining that the...
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4502050 |
Position discrimination device for a thumb wheel switch
A position discrimination device for a thumb wheel switch comprises a shift register and a ROM. The output data from the shift register and the data, determined by an inverted output from the shift...
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4496936 |
Digital-analog conversion for shaft encoders
Apparatus for producing an analog signal--having a relative amplitude that is indicative of the direction and rate of rotation of a shaft--from a pair of pulse streams provided by a shaft encoder...
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4491826 |
Incremental digital converter
An incremental digital converter for converting two phase displaced signals of a pulse generator, which signals represent the position and direction of an object moved in two opposite directions,...
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