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Cloaking System Using Optoelectronically Controlled Camouflage
A Cloaking System designed to operate in the visible light spectrum, utilizes optoelectronics and/or photonic components to conceal an object within it.
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| Number | Title | Issue Date |
| 7190129 | System and method for drift compensation when using pulse count controlled motors A system of detecting position drift in the motor due to lost pulses. Due to imperfections in the motor, the timing of the commutation pulses is not uniform but forms a unique repeatable signature. The system identifies lost pulses by using a pattern recognition tec... | 03/13/2007 |
| 7148641 | Direct current and alternating current motor and generator utilizing a periodic transformation system In an AC or DC motor operation and power generation system, a periodic transformation system reduces or prevents harmonic distortion, reduces resistance or impedance, and improves energy efficiency in a signal either consumed, such as in a motor, or produced, such a... | 12/12/2006 |
| 7075258 | Power control device of an electric tool, a method of power control of an electric tool and an electric tool provided with a power control device A power control device of an electric tool has a control or regulating device for adjusting a power output to an electric motor of the electric tool by means of a pulse width modulation, and a frequency transmitter that varies a frequency of the pulse width modulati... | 07/11/2006 |
| 7068006 | Stepping motor control circuit At the start of driving a stepping motor, a CPU sets the switching widths of the first through eighth states in a pulse width setting register, sets the switching counts of the first through eighth states in a pulse switching count register, and sets the start of dr... | 06/27/2006 |
| 6949904 | Power actuated seat Embodiments of the present invention provide methods and apparatus for controlling seats and for monitoring behavior of power-actuated seats. Certain embodiments permit seat occupancy data, e.g., whether the seat is occupied or a weight-dependent characteristic of t... | 09/27/2005 |
| 6911792 | System and method for controlling movement A system and method for controlling movement of a body includes a position-based velocity profile, at least one mover, a data processor for calculating a next position of the at least one mover using data from the position-based velocity profile and passing a next p... | 06/28/2005 |
| 6859001 | Torque ripple and noise reduction by avoiding mechanical resonance for a brushless DC machine A method of reducing torque ripple and noise for an brushless DC machine comprising: determining a control frequency for the electric machine, the control frequency indicative of an existing current command to and a rotational velocity of the electric machine; multi... | 02/22/2005 |
| 6825625 | Device with an electromotor An arrangement having an electric motor (10) has a microcontroller (12) for influencing at least one motor function and a nonvolatile storage element (14) for storing at least one variable as a definition for that motor function. The arrangement... | 11/30/2004 |
| 6819074 | Apparatus and method of controlling a driving speed of a motor An apparatus for controlling a driving speed of a motor comprises a motor controller provided in the motor controlling apparatus detecting the motor driving speed in response to pulses outputted from an encoder. The motor controller adjusts a detection period for th... | 11/16/2004 |
| 6815923 | Stepper motor jam detection circuit Methods, devices and circuits for detecting malfunctions in stepper motors. A signal from a driver circuit to a stepper motor that is proportional to the current in the windings of the stepper motor is detected. This signal is then amplified and integrated for ease ... | 11/09/2004 |
| 6771032 | Motor control system A motor control system is provided for controlling at least one motor driven mechanical actuator. The control system drives the motor according to a function of the actuator position. The system is further arranged to modify the motor speed to ensure that a predeter... | 08/03/2004 |
| 6611117 | Drive circuit for a brushless DC motor A drive circuit for a brushless DC motor controls at least one of a number of possible operation features of the motor. The drive circuit includes a driver stage for providing a current for a stator coil and varies which of the number of possible operatio... | 08/26/2003 |
| 6483265 | Methods and systems for minimizing vibration in electric machines Methods and apparatus for minimizing electrical machine vibration are described. In an exemplary embodiment of the method, power is applied to the motor under microprocessor control such that a pulse modulated current profile is applied to the motor which... | 11/19/2002 |
| 6456022 | Movable barrier operator A movable barrier operator having improved safety and energy efficiency features automatically detects line voltage frequency and uses that information to set a worklight shut-off time. The operator automatically detects the type of door (single panel or ... | 09/24/2002 |
| 6414455 | System and method for variable drive pump control A pump control system and method employs a variable drive for controlling the speed of an AC electric motor driving a cyclic load. A real-time tuning of the frequency and voltage of the AC input to the motor allows a controlled variation of a cycle speed ... | 07/02/2002 |
| 6407520 | Motor-vehicle door lock A motor-vehicle door latch to avoid unnecessary sound emission, has its motor operated with pulse-width modulation so that, once a blockade time point is reached or prior thereto, the motor is energized with reduced power so that it generates a ramp chara... | 06/18/2002 |
| 6243532 | Rotational speed control device for an electric motor A speed control device for an electric motor fed by a direct voltage source, the device comprising a controlled switch by which the motor voltage is alternately switched on and off under the control of a modulated switching pulse sequence. The switching f... | 06/05/2001 |
| 5998957 | Dissipativity-based controller for synchronous electric drives, and associated methods The invention provides a controller for specifying a drive voltage for synchronous motors relative to a desired speed profile. The controller senses motor current and optionally senses motor rotational position. A motor torque reference is first determine... | 12/07/1999 |
| 5844388 | Drive systems for a brushless motor employing predefined driving profiles stored in a nonvolatile memory The torque characteristic of an electrically driven brushless motor may be optimized by driving the phase windings of the motor with predefined, digitized and stored current or voltage profiles. Appropriate sequences of digital samples of the predefined d... | 12/01/1998 |
| 5793180 | Fully digital drive system for brushless motor with voltage or current profiles read from a digital memory Pre-defined driving profiles for the distinct phase-windings of an electronically controlled brushless motor are continuously reconstructed for each switching phase and forced in the form of a drive current or voltage on the respective windings, in synchr... | 08/11/1998 |
| 5680021 | Systems and methods for controlling a draft inducer for a furnace Draft inducer systems and methods for use with a furnace. A motor drives a fan in response to a motor control signal for inducing a draft which is a function of motor speed and motor torque. A processor defines a speed/torque operating curve having a mini... | 10/21/1997 |
| 5592058 | Control system and methods for a multiparameter electronically commutated motor A system which drives a component of a heating, ventilating, and/or air conditioning (HVAC) system in response to a system control signal such as a temperature signal provided by a thermostat. The system includes a motor having a stationary assembly and a... | 01/07/1997 |
| 5533166 | Method for calculating speed estimated value in speed control system A method for calculating a speed estimated value in a speed control system, comprises the steps of: (a) storing the number of speed detection pulses obtained at each interval of a speed control process and time that the speed detection pulse was obtained;... | 07/02/1996 |
| 5426355 | Power-off motor deceleration control system A system (20) for controlling deceleration of a motor (22) during an abrupt power-off condition includes a processor (40), a motor control circuit (50), and a secondary power source (70). During normal power-on operation and based on currently prevailing ... | 06/20/1995 |
| 5367239 | Printer carrier driving method Disclosed is a method for driving a printer carrier. One power source is connected via a constant current circuit to the carrier motor. Data storing means stores the current command data corresponding to the acceleration, constant speed printing and decel... | 11/22/1994 |
| 5347205 | Speed and mode control for a blender A blender is provided with a microprocessor for controlling energization of the blender drive motor, and a plurality of manually actuated switches for controlling the stepping of the microprocessor through a program which determines the mode and pattern o... | 09/13/1994 |
| 5331263 | Velocity control device A velocity control device is disclosed having feedforward signal applied to a velocity servo loop. An actuator moves a laser beam spot to a desired track of an optical disk. A displacement of the laser beam spot outputted from the actuator is differentiat... | 07/19/1994 |
| 5325460 | System and method for controlling the speed of an electric motor in an extremely low speed range using a rotary pulse encoder A system and method for controlling the speed of a motor operating in an extremely low speed range and having a rotary pulse encoder which outputs a pulse whenever a rotation axle of the motor has rotated through a predetermined angle. The extremely low s... | 06/28/1994 |
| 5317668 | Motor control device for controlling motor speed depending on imparted load For operating a plurality of mechanisms with a single motor, a motor control device is provided which is capable of stably operating one of the mechanisms while reducing influence of load imparted on the motor and attributed by an operation of remaining o... | 05/31/1994 |
| 5294872 | Method and apparatus for operating vacuum cleaner Method and apparatus for operating a vacuum cleaner in which by detecting a rotational speed of a variable speed fan motor adapted to give a suction force to the cleaner and its change range, the choking state of the filter and the state of the cleaned su... | 03/15/1994 |
| 5223774 | Method for controlling speed of a motor of a card reader A method for controlling a speed of a motor includes the steps of setting an upper limit threshold level for the thresholding at an upper limit value of the set speed range and a lower limit threshold level for the thresholding at a lower limit value of t... | 06/29/1993 |
| 5166585 | Motor control apparatus for an electric vacuum cleaner Method and apparatus for operating a vacuum cleaner in which by detecting a rotational speed of a variable speed fan motor adapted to give a suction force to the cleaner and its change range, the choking state of the filter and the state of the cleaned su... | 11/24/1992 |
| 5162709 | Apparatus for controlling blower motor of automobile air-conditioner An apparatus for controlling a blower motor composed of a brushless motor is operative to control the blower motor, in the pulse width modulation (PWM) mode, with a number of pulses which are inversely proportional to a setting speed so as to reduce the m... | 11/10/1992 |
| 5093892 | Motor speed control system There is disclosed a motor speed control system particularly applicable to control sewing machine operation, including an evaluator to compare a preset speed of revolution value and an actual speed of revolution value to output one signal representing a d... | 03/03/1992 |
| 5029230 | Motor control apparatus and speed setting apparatus A motor control apparatus for a sewing machine includes an adjustable speed setter for generating a speed set signal. A first memory stores a plurality of reference values each defining a reference region into which the speed set signal can fall. A second... | 07/02/1991 |
| 5010287 | Induction motor control system An improved induction motor control system utilizes an inverter supplying a variable frequency AC voltage to drive the induction motor, and volt/frequency (V/F) control section controlling the inverter to produce a suitable voltage and frequency in a pred... | 04/23/1991 |
| 4933616 | Drive control system for imprinting apparatus The mailing machine includes a print drum and shutter bar assemblies and a transport system for receiving seriately and assuming displacement control over envelopes from a feed means. The mailing machine drive control system is a microcomputer in control ... | 06/12/1990 |
| 4897778 | Motor control device There is provided a motor control device comprising a motor; an apparatus for entering the number of revolutions of the motor; a detector that detects the number of revolutions of the motor; and a microcomputer for entering the output from the detector an... | 01/30/1990 |
| 4879754 | Speed controller The invention provides a speed controller which detects the period of an AC signal containing information of the rotational speed of a motor and controls the rotational speed based on the detected period value and a reference speed value. More particularl... | 11/07/1989 |
| 4827197 | Method and apparatus for overspeed protection for high speed centrifuges An apparatus and method of protecting a centrifuge from rotor overspeed and resultant mishap by computation of the rotor moment of inertia is disclosed. In the preferred embodiment, a centrifuge is driven by a rotor mounted on a shaft which shaft is in tu... | 05/02/1989 |
