45results about How to "Signal is generated" patented technology

The present invention discloses a computer implemented signal analysis method through the Hilbert-Huang Transformation (HHT) for analyzing acoustical signals, which are assumed to be nonlinear and nonstationary. The Empirical Decomposition Method (EMD) and the Hilbert Spectral Analysis (HSA) are used to obtain the HHT. Essentially, the acoustical signal will be decomposed into the Intrinsic Mode Function Components (IMFs). Once the invention decomposes the acoustic signal into its constituting components, all operations such as analyzing, identifying, and removing unwanted signals can be performed on these components. Upon transforming the IMFs into Hilbert spectrum, the acoustical signal may be compared with other acoustical signals.

An apparatus for monitoring the intra-abdominal pressure of a patient includes a urinary catheter (102) connected to a urine valve (250) providing selectable communication between a discharge end of the urinary catheter (102) and either a drain (224) or a fluid source (104). Preferably, the urine valve (250) is adapted for remote actuation and has a housing adapted to resist patient discomfort from leg-valve (250) contact. Plumbing structure desirably maintains fluid supply (225) and drain (223) conduits in a substantially parallel arrangement to assist routing those conduits (225, 223) between a patient's legs. When the urine valve (250) is oriented to permit communication with the fluid source (104), an infusion pump (116′) may be used to infuse a known quantity of fluid through the urine valve (250) and into the patient's bladder (216). A pressure transducer (218) desirably is connected in-circuit to indicate the fluid's pressure and avoid pressure fluctuations induced by system components. To facilitate the infusion process, an automatic flow control device may be included in a fluid supply path (225) and arranged to permit repetitive operation of a syringe (116′) to inject a bolus of fluid into the patient's bladder (216). Subsequent to making a pressure measurement, the urine valve (250) is returned to the bladder (216) draining position.

A noise reducing circuit includes a denoising unit configured to eliminate a noise band from an input voice signal; a noise recognizing unit configured to recognize noise included in the voice signal; a denoising period generating unit configured to generate a signal indicating a denoising period in accordance with an occurrence period of the recognized noise; and a selecting unit configured to select an output of the denoising unit when the denoising period is indicated and select the voice signal when the denoising period is not indicated.

Methods and systems for acoustically determining reservoir parameters of subterranean formations. A tool comprising at least one seismic source or seismic receiver mounted thereon; a conveyance configured for movement of the acoustic tool in a borehole traversing the subterranean formations; and a source retainer configured or designed for permanent deployment in the borehole to removably retain the acoustic tool in the borehole. The source retainer when deployed provides acoustic coupling with the borehole and removably retains the acoustic tool in the borehole so that, over multiple deployments, the acoustic tool is repeatedly deployed at the same predetermined location and orientation relative to the subterranean formation, and with the same acoustic coupling to the borehole.

A phase-locked loop for a differential recovery of the clock signal wherein an extracted data signal (DS) is conveyed via a phase delay element and thence to a phase comparator. In the phase comparator comparison signals, whose phase shifts can be set relative to one another, differential phase evaluation is carried out. This results in a control signal (RS) whose operating point, independent of the power of the transmit channel, always lies in the center of the control range. In the inventive differential timing recovery, the dependencies on power fluctuations, signal-to-noise ratio, the pulse shape and on transmitted bit patterns are eliminated to the greatest possible extent.

A mobile apparatus and an operating method thereof are provided. According to the present invention, a sensor is installed in the mobile apparatus, and the sensor and a receiver are installed on the same side of the mobile apparatus. The sensor is used to detect whether an object exists within a predetermined distance or not and to generate a corresponding signal. Afterward, a touch unit is disabled or enabled according to the corresponding signal.

A smart translator “SMARTX” box provides an aircraft outfitted with an analog AGM-65 (“Maverick”) interface with the same “look and feel” and capability to use a store outfitted with a digital MIL-STD-1760 interface as if the aircraft was fully 1760 compliant without any modifications to the electronics or software of either the aircraft or store.

The invention relates to a hearing aid device for humans with impaired hearing, who have an at least partially functional cochlea and a functional nervous signalling pathway from the cochlea via the auditory nerve to the brain. The hearing aid device contains a receiver, a transducer of the sound or other acoustic signals into electrical current serving as a signal representing a sound, a pulsed irradiation source connected to the transducer for receiving the electrical current and for generating modulated pulsed irradiation in dependence from the electrical current, and preferably one or more optical fibres optically coupled to the exit of the pulsed irradiation source, wherein the optical path for conduction of irradiation within the device ends directly opposite a functional element of the natural vibration transduction pathway, e.g. adjacent the skull, the tympanic membrane, the hammer, the incus, the stapes, the outside of the cochlea, the otic capsule, the round window membrane, or the oval window membrane.

A highly agile low phase noise frequency synthesizer is provided for rapid generation of frequency specific signals. The frequency synthesizer is capable of rapidly generating signals at different output frequencies while maintaining low cross-coupling. Two or more signal generators utilize a reference frequency to generate two or more signals. These signals are limit processed to reduce cross-coupling prior to being presented to a switch. Responsive to a control signal, the switch outputs one of the signals to a frequency modification device, such as a frequency divider or multiplier. Responsive to a control signal, the frequency modification device scales the frequency of the switch output to convert the frequency of the switch output signal to a desired output frequency. By maintaining sufficient frequency separation between the switch input signals cross-coupling and phase noise is minimized and implementation on an integrated circuit may be achieved.

An ignition apparatus for an internal combustion engine, comprising at least one ignition plug, an actuating circuit provided with first and second coil pairs corresponding to one ignition plug for generating spark discharge in the at least one ignition plug. First and second ignition signals respectively supplied to the first and second coil pair are generated so that a first discharge period and a second discharge period partially overlap with each other during an overlap discharge period, the overlap discharge period is made equal to a set overlap period, and a start timing of the first discharge period is prior to a start timing of the second discharge period. The first and second discharge periods are time periods of electric discharges generated by the first and second coil pairs. The set overlap period is set according to the first discharge period, a temporary cut threshold value, and a discharge start current value at the start timing of the first discharge period. The temporary cut threshold value is a minimum value of the discharge current value at which no temporary cut of the discharge current in the ignition plug occurs.

A switched mode power supply is provided. The switched mode power supply includes a transformer, which includes at least one primary winding connected to a DC voltage via a switching element and a secondary winding connected to a load via a rectifier circuit including at least one diode, and at least one piezoelectric fan which generates an air flow at the transformer and/or at the switching element and/or at the diode. The air flow produced can be guided in a targeted manner onto the components to be cooled, with the air flow remaining low and therefore, no contamination by air particles arises.

A drive circuit for a high-frequency agitation source includes a signal generator generating a train of low voltage square-wave pulses at a drive frequency, a booster including a boost inductor generating a back EMF and configured to produce a high-voltage pulse train in response to the low-voltage square-wave pulse train and a filter producing a drive signal having a pre-determined harmonic of the drive frequency, the drive signal being used to drive the high-frequency agitation source. The drive circuit is particularly suitable for use with piezoelectric crystals.

A microcomputer reset apparatus including a counter for counting pulses of a pulse signal generated by a ring oscillator, and an edge detector driven by a clock signal of the microcomputer, for detecting an edge of each pulse of the pulse signal to produce a reset signal of the counter. The edge detector halts its edge detection when the clock signal is suspended so that the reset signal of the counter is not produced. Thus, the count value of the counter overflows without being reset, and the microcomputer is reset by the overflow signal. This can solve a problem of a conventional microcomputer reset apparatus in that when its microcomputer operates normally, the microcomputer must regularly supply its 8-bit timer (counter) with a reset pulse to prevent the 8-bit timer from overflowing and producing the reset signal of the microcomputer, and that this increases the processing load of the microcomputer.

An LED device is provided. The LED device implements an efficient dimming operation. The LED device includes a triac dimmer for receiving an AC voltage and adjusting an angle of the AC voltage, a ballast for receiving the AC voltage from the triac dimmer and generating an AC voltage pulse, a bridge diode unit for generating a DC voltage pulse using the AC voltage pulse, an LED for receiving a DC current and emitting a light, an LED drive controller for receiving a dimming signal and controlling the DC current passing through the LED, and a dimming signal generator for receiving the AC voltage pulse from the ballast and generating a pulsating dimming signal for compensating an output of the triac dimmer and providing the dimming signal to the LED drive controller.

The present invention discloses a train pantograph structural health monitoring system. The system includes one or more sensors mounted to or integrated with the train pantograph, a data acquisition unit for receiving signal or data from the sensors, and a processing unit for determining the train pantograph's structural health based on the received signal or data. Inspections via the system can be performed in real time continuously or periodically while a train is in service. It can also be performed offline while a train is not in service. Inspection method can be either passive, where sensors collect signals without generating excitation signals to the structure, or active, where some sensors are used as actuators to actively send excitation signals to the structure and other sensors or the actuators themselves collect the structural response signals. The data acquisition unit receives signals or data from sensors. The processing unit processes sensor data acquired by the data acquisition unit and determines if there are structural changes or damages.

Provided is a device for generating a chaotic signal comprising a PN signal generator that is composed of a digital logic circuit and generates a digital pseudo random signal with a predetermined frequency; a voltage control that generates a clock signal with a predetermined frequency; a mixer that mixes the pseudo random signal and the clock signal so as to generate a chaotic signal to output; and a band-pass filter that filters the chaotic signal, output from the mixer, into a chaotic signal of a desired band and then outputs the filtered signal.

A measuring device for measuring the power of a high-frequency signal including a detector for detecting the high-frequency signal and for generating an analog detector signal, an analog/digital converter for generating a digital signal and an evaluation device for evaluating the digital signal. A dither supply device for the supply of a dither signal and a chopper, which periodically chops the analog detector signal with a chopper signal, are disposed between the detector and the analog/digital converter. In this context, the dither signal is supplied synchronously to the chopper signal.

An apparatus for identification of medically related technical accessories and patients comprises a connected transponder reader and a monitoring device. The transponder reader can read out an accessory transponder attached to a medical accessory (possibly an irradiation mask) and a patient transponder. The monitoring device can acquire information read out from an accessory transponder by the transponder reader as an input signal and, dependent on this input signal, can generate an accessory identification signal. It can also acquire information read out by the transponder reader from a patient transponder as an input signal and, dependent on this input signal, can generate a patient identification signal. The apparatus can be part of a radiation therapy system. A system for identification of medically related technical accessories, comprised of a monitoring device, a transponder reader connected with the monitoring device, and an accessory transponder attached to a medical accessory is also provided.

A position and electromagnetic field sensor is provided. The sensor relies upon an oscillator such as a Robinson marginal oscillator to generate an rf or microwave electromagnetic field. As an inhomogeneously-shaped object, such as a metallic toothed wheel, for example, moves through the resultant field, the field experiences a change in electric or magnetic susceptibility. This in turn causes energy losses in the oscillator the magnitude of which can be output as a d.c. signal related thereto. To detect non-moving objects which nevertheless generate an electromagnetic field or have attached to them a source thereof, the sensor may also include a giant or colossal magnetoresistive structure located adjacent the oscillator coil, the structure having an imaginary magnetic susceptibility which is strongly dependent upon the magnitude and direction of the field generated by or at the object to be sensed.

The present invention discloses a refresh oscillator including a biasing circuit for generating constant first and second biases by using current mirrors, regardless of variations of a power supply voltage, a start-up circuit for stabilizing the initial operation of the biasing circuit by applying a predetermined level of potential to the biasing circuit, and an oscillator for generating a constant period of refresh signals according to the first and second biases. The refresh oscillator can improve operation reliability by generating a constant period of signals, regardless of variations of the power supply voltage.

A device for reliably generating signals in a motor vehicle, having a control arrangement which is supplied at least one control signal, the control arrangement generating a trigger signal as a function of the control signal in order to trigger at least one switching element or driver. The control arrangement includes an emergency-operating arrangement which, in an emergency operation, generates the trigger signal as a function of at least the one control signal, a testing arrangement being provided, which tests the operativeness of the emergency-operating arrangement by selective triggering.