215 results about "Impulse detection" patented technology

A system for detecting and correcting impulse noise present on an input data signal includes an impulse detector module receiving an input data signal and producing as output an correction enable signal indicating when an impulse correction is required. An impulse corrector module receives the input data signal and a correction enable signal and produces a corrected data signal, e.g., having the impulse canceled or blanked, as output. A reliability estimator and selector module receives the corrected data signal and the input data signal and selects as output the input signal which is more reliable. In one embodiment, the impulse detector includes first and second complementary impulse detectors, the outputs of which are analyzed by an enable and correction module to produce an impulse detection signal with improved accuracy. Preferably, the enable and correction module also indicates the most appropriate type of impulse correction in accordance with the detection signals from the complementary detectors. A novel system and method of detecting impulses based on Gram Schmidt techniques is also presented. In this method, one or more channels of a multi-channel data signal are kept free of data. When a whitening filter is applied, impulses on these quiet channels are emphasized. The Gram Schmidt technique exploits this fact to provide for improved impulse detection. The system can be modified to detect other types of low dimensionality noise.

A pixel for the detection of electromagnetic radiation or high energy particles or charge packets, in particular for detecting X-ray photons, comprises a radiation receptor for converting the radiation into a sensing signal, the pixel being adapted for performing both pulse detection and integration of the same sensing signal.

A self-powered tire revolution counter includes a motion sensitive power generation mechanism, a power conditioner, a pulse detector, a microcontroller, and, optionally, a radio frequency (RF) transmitting device. In one exemplary embodiment, the power generation mechanism corresponds to a piezoelectric patch that, during movement, provides both operating electrical power and pulsed signals indicative of tire rotation. The power conditioner receives a generator signal from the power generation mechanism and produces a conditioned output voltage that can be used to power associated electronic devices, including the microcontroller. The pulse detector receives the generator signal and produces a detection signal whenever the generator signal meets a predetermined condition. The microcontroller is programmed to determine current and lifetime-accumulated values of selected pulse indications in the detection signal that meet predetermined criteria. Data corresponding to tire environment related parameters such as temperature, pressure, tire deflection, and/or vehicle speed may be stored in the microcontroller at times during tire rotation as power is supplied from the power generation mechanism through the power conditioner. Additional data may be supplied to the microcontroller directly from an external source and read from the microcontroller either by direct electrical contact or via selective RF transmission.

A delay tracker for a signal processing system, which delay tracker utilizes a special code or pulse on the active portion of the tracked signal with the system including a pulse detector later in the system subsequently recognizing the special code or pulse in order to identify such signal and ascertain any delays associated with the signal for use by the system including possible resynchronization of the tracked signal with another signal associated therewith.

According to one embodiment of the present invention, a method for detecting a defect in an integrated circuit using an optimized power pulse includes applying a first pulse of power to a first integrated circuit for an optimized pulse duration. The optimized pulse duration is determined as a function of a difference in temperature between a second, defective integrated circuit and a third, non-defective integrated circuit. The temperature of the first integrated circuit is measured after the first pulse of power is applied to the first integrated circuit for the optimized pulse duration, and a determination is made as to whether the first integrated circuit is defective based on the temperature of the first integrated circuit.

A liquid level detection-type self-calibration high-precision water level gauge comprises a controller, a steel wire take-up pulley, a motor, a measurement driving wheel, a rotary encoder, a steel wire rope and a heavy hammer. A rotating shaft of the motor is connected with a rotating shaft of the steel wire take-up pulley; the steel wire take-up pulley is wound with one end of the steel wire rope, and the other end is connected with the heavy hammer through the measurement driving wheel; the rotary encoder is connected with a measurement driving wheel shaft; the controller includes a central processing unit which outputs a motor control signal to a motor driving unit to drive the motor to rotate; a zero position detection signal of a heavy hammer zero position detection unit, a water surface detection signal of the heavy hammer arriving at a water surface detection unit, and an encoding impulse signal of an encoder impulse detection unit are input to the central processing unit; and the data is processed by the central processing unit which also transfers the data to an external data processing unit. By adopting the active liquid level detection method and the zero position self-calibration method, the invention can prevent the heavy hammer from dropping into the water, and eliminate the accumulated error produced by the skidding of the steel wire rope and the impulse loss of the encoder, thereby ensuring high-precision and wide-range measurement of the water level.

The invention discloses a multi-laser-beam heterodyne micro-impulse-measuring device and a multi-laser-beam heterodyne micro-impulse-measuring method and relates to the technical field of micro impulse detection. By the device and the method, the problems of low energy coupling efficiency and big system error in the current small-impulse-measuring system are solved and the micro impulse measurement is carried out on the basis of a laser heterodyne technology and a Doppler effect. The method comprises the steps of: converting the micro impulse generated under the action of the laser and a target into a rotating angle of a torsional pendulum; then introducing a scanner into the measuring light path to attach an optical frequency to each of the light signals entering at different time points, so that a reflected light from the front surface of a planer standard lens and a transmitted light reflected by the front surface and the back surface of the planer standard lens for many times generate a multi-beam heterodyne interfering signal under an interfering condition; and thus modulating the change information of the rotating angle of a standard beam into the frequency difference of a medium-frequency heterodyne signal successfully. With polyvinyl chloride (PVC) and 2 percent of carbon (C) as working fluid, the micro impulse generated under the action of the laser and the working fluid is simulatively measured by using a torsional pendulum method and the measurement result shows that the maximum relative error of the measurement is less than 2.3 percent.

The invention relates to a relay protection device pressboard outlet logic detection apparatus. The logic detection apparatus comprises a relay protection device outlet pressboard ms-level instantaneous voltage impulse detection circuit, a relay protection test-stand dry contact state detection circuit, a microprocessor, a drive, timing display and sound-light alarm circuit and a power indication and grounding disconnection indication circuit, wherein the output terminals of the relay protection device outlet pressboard ms-level instantaneous voltage impulse detection circuit and the relay protection test-stand dry contact state detection circuit are connected with corresponding input terminals of the microprocessor respectively; the output terminal of the microprocessor is connected with the input terminal of the drive, timing display and sound-light alarm circuit; the input terminal of the power indication and grounding disconnection indication circuit is connected with the output terminal of the drive, timing display and sound-light alarm circuit. The advantages of the logic detection apparatus are that: detection accuracy and sensitivity are high, and wiring and operation are simple.

An automatic pulse detector compares a radar video pulse to a delayed and amplified version of itself. The radar video pulse serves as an amplitude reference for a comparator. A delayed and amplified version of the same pulse serves as the pulse to be detected. Time of detection is amplitude independent and is not degraded by flat-topped pulses. Pulse detection occurs at a fixed, fractional point on the leading edge of a pulse where noise has less temporal influence than at the top of a pulse. Unlike a time-of-peak detector, the self-referencing pulse detector is well-suited to detecting wide, flat-topped pulses produced by expanded-time, pulse-echo radars operating in relatively narrow ISM bands.

Abstract of Disclosure An apparatus and circuit for monitoring the closed position of a fuel cap relative to a tank connection pipe . The fuel cap has a ratchet torque limiter for controlling the tightening of the fuel cap to the tank connection pipe. A magnet is connected to the fuel cap and a magnetic switch, such as a reed switch, is connected to the tank connection pipe or proximal thereto. The movement of the magnet relative to the magnetic switch, indicating a locked fuel cap condition, is sensed by an abrupt change in magnetic field strength of the magnet. When releasing members snap over the cams therein, a current pulse is induced in a pickup coil . This current pulse is sensed and a logic level high voltage is produced corresponding to a tightened fuel cap condition. A dashboard lamp is then extinguished indicated that the fuel cap is safely and securely tightened.

The invention provides a single-shot laser pulse detection device. The single-shot laser pulse detection device comprises a detection light path for transmitting baseband detection light pulses, a reference light path for transmitting frequency-doubled reference light pulses, a dual-pulse generator for obtaining dual-pulses having a first time delay and transmitted collinearly along the reference light path, a light pulse converter for converting the dual-pulses into a series of dual-pulse form sub-pulses mutually delayed in time, separated from each other in space and propagated in parallel basically, a pulse stretcher for translating each frequency component of the baseband detection light pulses so as to stretch in the time domain, a dispersor for separating the frequency components in the baseband detection light pulses in space, and a plane detector for generating third-order mutual-correlation pulse signals from the baseband detection light pulses and the sub-pulses from the dispersor. The single-shot laser pulse detection device is capable of accurately measuring the waveform of the femtosecond petawatt lase pulses and solving the problem of difficult diagnosis of ultrafast and ultrastrong pulses large in dynamic range.

An all-digital line-of-sight (LOS) process architecture addresses the size, weight, power and performance constraints of a receiver for use in semi-active or active pulsed electromagnetic (EM) targeting systems. The all-digital architecture provides a platform for enhanced techniques for sensitive pulse detection over a wide field-of-view, adaptive pulse detection, LOS processing and counter measures.

The invention discloses a pulse-detecting circuit used for an ultrasonic gas flowmeter based on a time difference method. The pulse-detecting circuit is characterized by comprising a computer interface, a control circuit, a pre-amplification circuit, a peak value adjusting and transmitting circuit, a signal three-level amplification circuit, and a comparison circuit; wherein the pre-amplification circuit is respectively connected with the peak value adjusting and transmitting circuit and the signal three-level amplification circuit; and the pre-amplification circuit, the peak value adjusting and transmitting circuit and the signal three-level amplification circuit are electrically connected through the comparison circuit and the computer interface as well as the control circuit respectively. By adopting a peak value transmission method, the invention automatically changes a comparative level used for generating a zero-crossing comparison control signal according to changes of the peak value of a signal, avoids complex controls needed by a gain control, and simplifies a circuit structure to be very simple; and moreover, the invention avoids precision loss generated during conversion and a balanced contradiction between cost and precision without adopting AD/DA conversion.

A pulse wave velocity measurement device comprises a pulse wave detection unit (110) for detecting a pulse wave in a living body, a pulse wave velocity calculation unit (120) for calculating a pulse wave velocity on basis of the pulse wave detected by the pulse wave detection unit (110), and a pulse wave velocity correction unit (130) for correcting the pulse wave velocity calculated by the pulse wave velocity calculation unit (120) so as to eliminate an increment in the pulse wave velocity that results from influence of hydrostatic pressures caused according to a position of the living body. Thus, the pulse wave velocity measurement device can be provided that are capable of accurate measurement of the pulse wave velocity without being influenced by the hydrostatic pressures caused according to the position of the living body.

A system and method is provided for improved monitoring and controlling of mechanically commutated DC motors. The system and method include DC motors, pulse-count driver circuitry for driving the motors, motor position sensing circuitry, and motor control circuitry. The system and method provide for improved motor current waveform sensing that is able to effectively reject false brake pulses, avoid erroneous processing due to fluctuating battery voltage levels, and reduce the sensitivity to variations in motor current signals due to dynamic motor load, manufacturing variation, system aging, temperature, brush bounce, EMI, and other factors. The system and method also include an improved ability to multiplex additional external motor drivers to the motor control circuitry, select between sequential and simultaneous drive modes using an SPI bit, and monitor the system controller for an error condition and simultaneously driver motors in response to the error condition.

A verifying device of a grating groove defect aims at resolving the problem that a main ruler has the conditions of stain and inconsistency of front and back phases in the manufacture process of a grating ruler, and a manual method cannot finish verifying of the grating ruler. A first shifting driving device of the verifying device drives a signal detection head to move along the detection direction, the signal detection head detects light transmitted by a light source and modulated by a grating to be measured and a standard grating, the light is converted into electric signals through a photoelectric detector, amplification processing and analog-digital conversion are conducted through a signal processing module on the electric signals, finally a pulse detection module is used for detecting and scoring the defect and copying existence and position of the defect through pulse signals, a second shifting driving device moves the position of the standard grating, and the processing is repeated till the detection finished. The verifying device is used for measuring the defect of long grating, groove evenness detection and phase consistency detection of a length grating ruler.

The present invention relates to a sleep alert device that acts by pressure of the fingers of the user on sensors. The invention includes a limited number of sensors as well as an instant alarm system which prevents accidental problems with previous delay alarm systems. At least one sensor is mounted on the fingers of the user or the steering wheel and with no delay of any kind connected directly or wirelessly to a control panel for control of the pressure sensors. The device has a means for detecting the wearing by the user, such as a pulse detector which can tell if the device is on or off when a pulse is detected respectively.

In one embodiment, a method that includes creating a filter structure using a parameter of a periodic pulse train, the filter structure having a plurality of time slots, each time slot being associated with a memory value; receiving a pulse at a time; incrementing the memory value associated with the time slot corresponding to the time the pulse was received; filtering the pulse if the memory value exceeds a threshold; and transmitting the pulse to a processor if the memory value does not exceed the threshold. In another embodiment, an apparatus that includes an input filter; a pulse detection circuit coupled to the input filter; a periodic pulse filter coupled to the pulse detection circuit; and a pulse queuing and transmission circuit coupled to the periodic pulse filter.