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41results about How to "Noise affecting" patented technology
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Noise reduction device
A noise reduction device including a noise detection microphone including a high-frequency noise detection microphone and a low-frequency noise detection microphone for respectively detecting a high-frequency noise and a low-frequency noise generated from a noise source; a noise control unit for generating a control sound signal for cancelling a noise detected by the noise detection microphone in a control center of control space; and a loudspeaker for outputting a control sound based on the control sound signal from the noise controlling unit. The high-frequency noise microphone is disposed in a vicinity of a head portion of a user in a state in which directivity in an opposite direction with respect to the control center is added, and the low-frequency noise detection microphone is disposed outside of a sound-insulating wall.
Owner:PANASONIC CORP
Personal authentication method, personal authentication apparatus and image capturing device
ActiveUS7155035B2Avoid accuracyNoise affectingElectric signal transmission systemsImage analysisIris codeLight reflection
A plurality of iris images of a person to be authenticated in which the positions of extraneous light reflection are respectively different are captured by using an image capturing device. Iris codes, that is, features for authentication, are respectively extracted from the plural iris images, and the plural iris codes thus extracted are respectively compared with a registered iris code, so as to generate a plurality of comparison results. The plural comparison results are integrated to obtain an ultimate comparison score, which is used for the authentication.
Owner:PANASONIC CORP
Mass measurement method, circuit for exciting piezoelectric vibration reed for mass measurement, and mass measurement apparatus
InactiveUS20050052813A1Excitation cheaplyReduce processWeighing apparatus using elastically-deformable membersFlow propertiesLoop filterPhase difference
A mass measurement apparatus with an excitation circuit is provided to forcibly excite a piezoelectric vibration reed. The excitation circuit comprises a PLL circuit including, a voltage controlled oscillation circuit outputting an excitation signal to the reed and a phase comparator via a distributor. The phase comparator outputs a signal corresponding to a phase difference between an output signal of the reed and the excitation signal. The signal is passed through a loop filter to be converted to a direct-current voltage and supplied to the oscillator as a control voltage. The oscillator has an oscillation frequency varying in according to the control voltage, outputs the excitation signal with no phase difference with respect to the output signal of the reed, and causes the reed to resonate. A signal processing unit counts the output frequency of the oscillator and calculates the resonance frequency of the reed.
Owner:SEIKO EPSON CORP
Apparatus equipped with electronic control units
ActiveUS20050112940A1Reduce the burden onSmall sizeVehicle connectorsElectrically conductive connectionsElectricityEngineering
Owner:YAZAKI CORP
Method for Estimating the Distance of a Receiver from a Radio Transmitter, Relative Methods for Calculating the Position of a Mobile Terminal, Mobile Terminal and Localization Device
ActiveUS20130310074A1Improve phase differenceImprove distance estimatePosition fixationUsing reradiationPhase differenceRadiotransmitter
A method for estimating the distance (d) of a receiver (102) from a radio transmitter (101) includes the steps of: receiving (602) radio signals (103, 701) irradiated by the transmitter (101), which include components from which at least three tones (1,2,3,4) are extracted, each having a different frequency; measuring (606) a first phase difference (Δφ21) between first two tones (1, 2) of the at least three tones, whose frequencies (f1, f2) have a first spacing, and measuring a second phase difference (Δφ43) between second two tones (3, 4) of the at least three tones, whose frequencies (f3, f4) have a second spacing, wherein one of the first spacing or second spacing is greater than the other; estimating (607, 611, 613) the distance (d) on the basis of the first phase difference (Δφ21) and the second phase difference (Δφ43).
Owner:EMERGENT MOBILE LLC
Relating to driving brushless DC (BLDC) motors
ActiveUS20090096397A1Reliably determinedIncrease torqueMotor/generator/converter stoppersSynchronous motors startersWave shapeThree-phase
In a three phase BLDC motor the rotor position is monitored by detecting the zero crossing points of the induced back EMF signals BEMF_U, BEMF_V, BEMF_W in the phase windings U, V, W. As they are illustrated, the back EMF signals are substantially sinusoidal but they may in other situations be substantially trapezoidal. The three back EMF signals are 120° out of phase with each other. In order to accurately monitor the back EMF in a phase winding, the driving waveform for each phase U, V, W includes an undriven period P close to the expected zero crossing point. The period P can be a preset part of the driving waveform or can be an interruption of the normal driving waveform in response to suitable interrupt signals. In order to determine the zero crossing points of each back EMF signal, two (or more) samples of the back EMF are taken during the undriven period P and used to interpolate the back EMF signal to determine the zero crossing point.
Owner:MELEXIS TECH NV
Circuit module and power line communication apparatus
InactiveUS20080123302A1Noise affectHigh reliabilityModulated-carrier systemsPower distribution line transmissionPower-line communicationGround layer
A circuit module is mounted with an IC that modulates and demodulates a multicarrier signal. The circuit module has a laminated board, which is provided internally with a plurality of conductive layers laminated having insulating layers in between, and an IC, which is provided with a plurality of ground terminals to be grounded. Of the plurality of conductive layers, a conductive layer provided proximate to the IC configures a ground layer electrically connected to the plurality of ground terminals.
Owner:PANASONIC CORP
Relating to driving brushless DC (BLDC) motors
ActiveUS8212508B2Reliably determinedIncrease torqueMotor/generator/converter stoppersAC motor controlThree-phaseEngineering
In a three phase BLDC motor the rotor position is monitored by detecting the zero crossing points of the induced back EMF signals BEMF_U, BEMF_V, BEMF_W in the phase windings U, V, W. As they are illustrated, the back EMF signals are substantially sinusoidal but they may in other situations be substantially trapezoidal. The three back EMF signals are 120° out of phase with each other. In order to accurately monitor the back EMF in a phase winding, the driving waveform for each phase U, V, W includes an undriven period P close to the expected zero crossing point. The period P can be a preset part of the driving waveform or can be an interruption of the normal driving waveform in response to suitable interrupt signals. In order to determine the zero crossing points of each back EMF signal, two (or more) samples of the back EMF are taken during the undriven period P and used to interpolate the back EMF signal to determine the zero crossing point.
Owner:MELEXIS TECH NV
Distance Measurement Method and Device Using Ultrasonic Waves
InactiveUS20080192573A1Easy constructionEasy to controlLinesAcoustic wave reradiationAudio power amplifierUltrasonic transmission
The present invention provides a method of and an apparatus for measuring a distance using an ultrasonic wave. The method comprises steps of receiving through an ultrasonic sensor a signal generated from an ultrasonic transmitter according to a signal of ultrasonic transmission time, amplifying the received signal, filtering a high-frequency wave from the amplified signal, outputting only a signal corresponding to a predetermined signal size from the signal in which the high-frequency wave is filtered, and computing a distance value by calculating the period of the output signal. The apparatus comprises an ultrasonic transmitter for transmitting an ultrasonic wave, a device for transmitting a synchronized signal in a wired or wireless mode in order to an ultrasonic transmission signal, an ultrasonic sensor for receiving the ultrasonic signal transmitted from the ultrasonic transmitter, an amplifier for amplifying the received signal to the ultrasonic sensor, a filter for filtering a high-frequency signal from the amplified signal in the amplifier, a comparator for outputting only a signal corresponding to a predetermined signal size from the filtered signal, and an arithmetic unit for computing a distance value by calculating the period of the output signal.
Owner:KT CORP
Vascular endothelial reactivity measuring apparatus and method for controlling the measuring apparatus
InactiveUS20060122489A1Short timeNoise affectingBlood flow measurement devicesPerson identificationGeometric propertyBiological body
A vascular endothelial reactivity measuring apparatus according to the present invention includes: a blood flow blocking section 2 for blocking blood flow through the arterial blood vessel of an organism; an evaluating section 4 for evaluating the geometric property of the arterial blood vessel or its wall; and a control section 3 for controlling the blood flow blocking section such that the blood flow through the arterial blood vessel is repeatedly blocked and unblocked in at least two iterative blocking / unblocking cycles. During at least a part of a period in which the blood flow through the arterial blood vessel is unblocked, the evaluating section 4 evaluates the geometric property and processes data, representing the geometric property during the partial period, in the iterative blocking / unblocking cycle.
Owner:KONICA MINOLTA INC
Pressure Detecting Apparatus Utilizing Electromagnetic Coupling
InactiveUS20070214897A1Lower impedanceLess affectedForce measurement by measuring magnetic property varationPedestrian/occupant safety arrangementElectromagnetic couplingLarge size
The object of the present invention is to provide a pressure detecting apparatus that is less affected from noises and can be constructed in a large size. The pressure detecting apparatus according to the present invention utilizes electromagnetic coupling. The sensor section comprises first coils 1, second coils 2 provided on the first coils such that they are superimposed to each other, and a first cushion member 3 provided between the first coils and the second coils. A drive circuit for driving either of the first coils and the second coils and a detection circuit for detecting pressure applied against the sensor section on the basis of signals resulting from electromagnetic coupling from the other of the first coils and the second coils are connected to the sensor section. The sensor sections are disposed in a matrix state so that measurements of pressure distribution can be effected.
Owner:XIROKU INC
Protective circuit board for battery pack
ActiveUS20060096778A1Minimize impactNoise affectingCells structural combinationSecondary cells charging/dischargingInsulation layerEngineering
A protective circuit board for a battery pack for controlling charge and discharge states of the battery pack includes an insulation layer and a first signal pattern disposed inside the insulation layer. The circuit can further include a second signal pattern disposed inside the insulation layer. The circuit can include a first dummy pattern spaced from a first side of the first signal pattern and a second dummy pattern spaced from a second side of the first signal pattern.
Owner:SAMSUNG SDI CO LTD
Apparatus equipped with electronic control units
ActiveUS7137823B2Reduce the burden onSmall sizeVehicle connectorsElectrically conductive connectionsElectricityEngineering
Owner:YAZAKI CORP
Imaging device
ActiveUS20150263052A1Stable characteristicHigh detection sensitivityTransistorSolid-state devicesImaging equipmentSemiconductor
An imaging device is provided at a lower manufacturing cost. In a light-receiving portion of an imaging device which includes the light-receiving portion, a first transistor connected to the light-receiving portion, and a peripheral circuit, a comb-like n-type semiconductor and a comb-like p-type semiconductor are arranged so as to engage with each other in a plan view. Further, the light-receiving portion and the first transistor overlap with each other. The peripheral circuit includes a second transistor and a third transistor. Further, the second transistor and the third transistor include semiconductor layers having different bandgaps. Further, one of the semiconductor layers of the second transistor and the third transistor has the same bandgap as a semiconductor layer of the first transistor.
Owner:SEMICON ENERGY LAB CO LTD
Liquid ejecting apparatus and drive circuit
A liquid ejecting apparatus includes an ejecting unit that includes a piezoelectric element which is displaced by a first drive signal or a second drive signal; a first unit circuit that generates the first drive signal by using a first pair of transistors; a second unit circuit that generates the second drive signal by using a second pair of transistors; and an adjustment unit that delays at least one of a first control signal and a second control signal to supply the delayed control signal to a corresponding unit circuit, in a case where timing when a level of the first control signal for controlling the first pair of transistors changes and timing when a level of the second control signal for controlling the second pair of transistors changes are within a threshold time, and in a case where a predetermined condition is satisfied.
Owner:SEIKO EPSON CORP
Noise reduction device
ActiveUS8565442B2Quality improvementReduce noiseEar treatmentNoise generationNoise controlNoise detection
A noise reduction device including a noise detection microphone including a high-frequency noise detection microphone and a low-frequency noise detection microphone for respectively detecting a high-frequency noise and a low-frequency noise generated from a noise source; a noise control unit for generating a control sound signal for cancelling a noise detected by the noise detection microphone in a control center of control space; and a loudspeaker for outputting a control sound based on the control sound signal from the noise controlling unit. The high-frequency noise microphone is disposed in a vicinity of a head portion of a user in a state in which directivity in an opposite direction with respect to the control center is added, and the low-frequency noise detection microphone is disposed outside of a sound-insulating wall.
Owner:PANASONIC CORP
Method And System For Magnetic Resonance Imaging, And Use Thereof
ActiveUS20120062229A1High strengthNoise affectingMeasurements using NMR spectroscopyDiagnostic recording/measuringRadio frequencyResonance signal
The present invention refers to a method for magnetic resonance imaging or nuclear magnetic resonance spectroscopy comprising emitting a radio frequency and gradient pulse sequence towards an object being subjected to a magnetic field, wherein said object comprises a molecule having an atom with a nuclear spin differing from 0, encoding, detecting and acquiring a magnetic resonance signal from said object corresponding to said emitted radio frequency and gradient pulse sequence, wherein the radio frequency and gradient pulse sequence comprises a first weighting block, a mixing block with duration tm and a second weighting block, and wherein encoding, detecting and acquiring the magnetic resonance signal from said object is limited to initial decay of the signal intensity I with increasing strength of at least one of the first weighting block and the second weighting block, wherein the variation of the initial signal decay rate with tm is analysed to obtain the apparent exchange rate AXR.
Owner:RANDOM WALK IMAGING AB
Rotation detector
ActiveUS20150061654A1Error in position detectionReduce errorsMagnetic-field-controlled resistorsSolid-state devicesMagnetic polesAngle of rotation
A rod-shaped magnet is mounted on a rotating unit. The rod-shaped magnet has end surfaces which are oriented in a rotating direction and are magnetized to different magnetic poles. An angle detecting unit including magnetoresistive elements is disposed so as to be offset in a radial direction of a revolution path of the magnet from the revolution path and is configured to detect a change in angle of rotation of the rotating unit by detecting a leakage magnetic field in the vicinity of a side surface of the magnet. Two position detecting units each include magnetoresistive elements and are configured to detect a change in orientation of a magnetic field in the direction of a tangent to the revolution path when facing the rod-shaped magnet and produce a switch output.
Owner:ALPS ALPINE CO LTD
Protective circuit board for battery pack
ActiveUS7667979B2Minimize impactNoise affectingCells structural combinationSecondary cells charging/dischargingInsulation layerEngineering
A protective circuit board for a battery pack for controlling charge and discharge states of the battery pack includes an insulation layer and a first signal pattern disposed inside the insulation layer. The circuit can further include a second signal pattern disposed inside the insulation layer. The circuit can include a first dummy pattern spaced from a first side of the first signal pattern and a second dummy pattern spaced from a second side of the first signal pattern.
Owner:SAMSUNG SDI CO LTD
Pressure detecting apparatus utilizing electromagnetic coupling
InactiveUS7703341B2Lower impedanceLess affectedForce measurement by measuring magnetic property varationPedestrian/occupant safety arrangementElectromagnetic couplingElectromagnetic shielding
The object of the present invention is to provide a pressure detecting apparatus that is less affected from noises and can be constructed in a large size. The pressure detecting apparatus according to the present invention utilizes electromagnetic coupling. The sensor section comprises first coils 1, second coils 2 provided on the first coils such that they are superimposed to each other, and a first cushion member 3 provided between the first coils and the second coils. A drive circuit for driving either of the first coils and the second coils and a detection circuit for detecting pressure applied against the sensor section on the basis of signals resulting from electromagnetic coupling from the other of the first coils and the second coils are connected to the sensor section. The sensor sections are disposed in a matrix state so that measurements of pressure distribution can be effected.
Owner:XIROKU INC
Upstream data bypass device for a video system
InactiveUS20050216947A1Less affectedLess corruptedAnalogue secracy/subscription systemsTwo-way working systemsSignal onImage based
Owner:BOSCH SECURITY SYST INC +1
Method and system for magnetic resonance imaging, and use thereof
ActiveUS8810244B2High strengthNoise affectingMeasurements using NMR spectroscopyDiagnostic recording/measuringSpinsPulse sequence
The present invention refers to a method for magnetic resonance imaging or nuclear magnetic resonance spectroscopy comprising emitting a radio frequency and gradient pulse sequence towards an object being subjected to a magnetic field, wherein said object comprises a molecule having an atom with a nuclear spin differing from 0, encoding, detecting and acquiring a magnetic resonance signal from said object corresponding to said emitted radio frequency and gradient pulse sequence, wherein the radio frequency and gradient pulse sequence comprises a first weighting block, a mixing block with duration tm and a second weighting block, and wherein encoding, detecting and acquiring the magnetic resonance signal from said object is limited to initial decay of the signal intensity I with increasing strength of at least one of the first weighting block and the second weighting block, wherein the variation of the initial signal decay rate with tm is analysed to obtain the apparent exchange rate AXR.
Owner:RANDOM WALK IMAGING AB
Optical image stabilization apparatus and optical apparatus
ActiveUS20200077025A1Noise affectingTelevision system detailsColor television detailsEngineeringImage stabilization
An optical image stabilization apparatus includes an image stabilization element, a movable member configured to hold the image stabilization element, a support member configured to movably support the movable member, a coil held by one of the movable member and the support member, and a magnet held by the other of the movable member and the support member and opposite to the coil. The optical image stabilization apparatus drives the movable member by electrifying the coil to correct an image blur, and further includes a nonmagnetic conductor configured to cover a surface different from a magnet opposing surface of the coil that faces the magnet.
Owner:CANON KK
Commutator
InactiveUS20070080601A1Noise affectingPromote resultsRotary current collectorDynamo-electric machinesEngineeringElectrical and Electronics engineering
A commutator for an electrical machine, which has a plurality of laminations that have contact faces and are separated from one another by slots in which, in the laminations, at least one groove is provided in the contact face, which groove extends essentially in the longitudinal direction of the respective lamination. As a result, the frequency with which the brushes are excited by the commutator can be increased, which has a favorable effect on noise.
Owner:ROBERT BOSCH GMBH
Ultrasonic distance measurement method and device by extracting the period of a received signal from noise using a dual-threshold comparator
InactiveUS7668045B2Easy constructionEasy to controlLinesAcoustic wave reradiationUltrasonic sensorDual threshold
The present application discloses a method of and an apparatus for measuring a distance using an ultrasonic wave. The method of measuring a distance using an ultrasonic wave includes the steps of receiving through an ultrasonic sensor a signal from an ultrasonic transmitter; amplifying the received signal; filtering a high-frequency component from the amplified signal, thereby generating a filtered signal; generating an output signal when the filtered signal satisfies a predetermined condition; and computing a distance based on a period of the output signal.
Owner:KT CORP
Liquid ejecting apparatus and drive circuit
A liquid ejecting apparatus includes an ejecting unit that includes a piezoelectric element which is displaced by a first drive signal or a second drive signal; a first unit circuit that generates the first drive signal by using a first pair of transistors; a second unit circuit that generates the second drive signal by using a second pair of transistors; and an adjustment unit that delays at least one of a first control signal and a second control signal to supply the delayed control signal to a corresponding unit circuit, in a case where timing when a level of the first control signal for controlling the first pair of transistors changes and timing when a level of the second control signal for controlling the second pair of transistors changes are within a threshold time, and in a case where a predetermined condition is satisfied.
Owner:SEIKO EPSON CORP
Circuit module and power line communication apparatus
InactiveUS8310837B2Noise affectingImprove reliabilityModulated-carrier systemsPower distribution line transmissionElectricityConductive polymer
Owner:PANASONIC CORP
Apparatus for digital-analog conversion of a signal
ActiveUS7187315B2Noise affectingElectric signal transmission systemsDigital-analogue convertorsSignal onExternal variable
An apparatus for the conversion of a digital input signal into an analog output signal, the apparatus including a first circuit receiving the digital input signal that is representative of the analog output signal and suitable for producing a first signal on an output line, and a second circuit for supplying a second signal on the output line, in response to a further digital signal. The further digital signal is a function of external variables, and the union of the first and second signal on the output line forms the analog output signal.
Owner:STMICROELECTRONICS SRL
Multi-touch system and method for controlling liquid crystal capacitors to reduce touch sensing interference
ActiveUS9639192B2Reduce distractionsNoise affectingStatic indicating devicesNon-linear opticsLiquid-crystal displayTouch Senses
A multi-touch system for controlling liquid crystal capacitors to reduce touch sensing interferences includes K gate driving lines, which are divided into N groups each corresponding to a common voltage conductive line. When a display driving signal is applied to an i-th group of gate driving lines for performing a display driving, the liquid crystal capacitor corresponding to the i-th group is set to a predetermined voltage, where i=1 to N. Finally, a touch driving signal is applied to an i-th common voltage conductive line corresponding to the i-th group for sensing touch points, so as to reduce touch sensing affections caused by noises of the liquid crystal display.
Owner:FOCALTECH SYST CO LTD
Time delay measurement
InactiveUS8503578B2Reduce decreaseTime delay determinationVoltage-current phase anglePosition fixationTime delaysComputer science
A method of processing first and second corresponding signals having a delay therebetween. The method includes introducing a plurality of different delays between the first and second signals, successive delay amounts differing from each other by less than the interval between chip boundaries, and for each introduced delay, summing samples of the second signal which are obtained at the times of, at least, chip boundaries between bits of the first signal which have the same state, to obtain a value; thereby to obtain a representation of how the value varies according to the introduced delay, which representation contains a level change associated with an introduced delay which bears a predetermined relationship to the delay between the first and second signals.
Owner:MITSUBISHI ELECTRIC CORP
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