664 results about "Multiple pulse" patented technology

Methods and systems for performing multiple pulse LIDAR measurements are presented herein. In one aspect, each LIDAR measurement beam illuminates a location in a three dimensional environment with a sequence of multiple pulses of illumination light. Light reflected from the location is detected by a photosensitive detector of the LIDAR system during a measurement window having a duration that is greater than or equal to the time of flight of light from the LIDAR system out to the programmed range of the LIDAR system, and back. The pulses in a measurement pulse sequence can vary in magnitude and duration. Furthermore, the delay between pulses and the number of pulses in each measurement pulse sequence can also be varied. In some embodiments, the multi-pulse illumination beam is encoded and the return measurement pulse sequence is decoded to distinguish the measurement pulse sequence from exogenous signals.

A multiple pulsed dose drug delivery system for pharmaceutically active amphetamine salts, comprising a pharmaceutically active amphetamine salt covered with an immediate-release coating and a pharmaceutically active amphetamine salt covered with an enteric coating wherein the immediate release coating and the enteric coating provide for multiple pulsed dose delivery of the pharmaceutically active amphetamine salt. The product can be composed of either one or a number of beads in a dosage form, including either capsule, tablet, or sachet method for administering the beads.

A stimulation strategy for cochlear implants seeks to approximate the time domain response of a patient's neural system to electrical stimuli, to the time domain response of a normal hearing person to a corresponding acoustic stimulus. The strategy is designed to induce in the neurons of a patient a time domain response to an acoustic signal which is similar to, or approximates the time domain response induced by the normal processes in a healthy person. Various implementations are disclosed.

Methods for operating a pixel cell include efficient transferring of photo-charges using multiple pulses to a transistor transfer gate during a charge integration period for an associated photosensor. The pixel cell can be operated with efficient transfer characteristics in either normal or high dynamic range (HDR) mode. The high dynamic range can be realized by either operating an optional HDR transistor or by fluctuating the voltage applied to a reset gate.

An apparatus for measuring distance to a surface is disclosed. The apparatus transmits at least one subsequent pulse of light prior to receiving a reflection of a previously sent pulse of light. Thus, multiple pulses of light are in-flight at a given time. The embodiments are applicable to terrain mapping, bathymetry, seismology, detecting faults, biomass measurement, wind speed measurement, temperature calculation, traffic speed measurement, military target identification, surface to air rangefinding, high definition survey, close range photogrammetry, atmospheric composition, meteorology, distance measurement, as well as many other applications. Examples of such apparatuses include laser ranging systems, such as light detection and ranging (LIDAR) systems, and laser scanners. Data received from the apparatus by a data processing unit can be used to create a data model, such as a point cloud, digital surface model or digital terrain model describing the surface, terrain, and/or objects.

A material processing system and method is disclosed for processing materials such as amorphous silicon in an annealing processes and lithography processes on a silicon wafer, as well as ablation processes. A first laser generates periodic pulses of radiation along a beam path directed at the target material. Similarly, at least one additional laser generates periodic pulses. A beam aligner redirects the beam path of the at least one additional laser, such that the beam from the at least one additional laser is directed at the target along a path colinear with the first laser's beam path. As a result, all the lasers are directed at the target along the same combined beam path. The periodic pulses of the at least one additional laser are delayed relative to the first laser such that multiple pulses impinge on the target within a single pulse cycle of any given laser.

Electrical pulses are applied to tissue in a manner which destroys targeted cells such as cancerous cells while sparing non-targeted cells such as nerve cells. The electrical pulses are controlled within ranges for voltage, wattage and duration of application. Multiple pulses or groups of pulses may be applied to obtain a desired result while maintaining any temperature increase below a level which destroys cells.

Spectroscopic measurements are described based on light-molecule interaction in response to a resonant rate optical pulse train so that a Raman spectrum is reflected containing at least two types of vibrational mode information (e.g., vibrational frequency, and vibrational phase relaxation) on the molecules comprising the object. A pump optical pulse train generation means is configured for generating an optical pulse train having an arbitrary repetition rate which is directed through irradiation means to the sample object. Light from the sample object is collected and vibrational coherence is detected for the sample object. The sample is tested across a plurality of different repetition frequencies. The detected information can be compared with data from other known samples from within a database when analyzing the information collected.

A pulse width modulation (PWM) generator featuring very high speed and high resolution capability and the ability to generate standard complementary PWM, push-pull PWM, variable offset PWM, multiphase PWM, current limit PWM, current reset PWM, and independent time base PWM while further providing automatic triggering for an analog-to-digital conversion (ADC) module that is precisely timed relative to the PWM signals. Applications include control of a switching power supply that requires very high speed operation to obtain high resolution at high switching frequencies, and the ability to vary the phase relationships among the PWM output signals driving the power supply power components. A single PWM duty cycle register may be used for updating any and/or all PWM generators at once to reduce the workload of a digital processor as compared to updating multiple duty cycle registers.

A method and apparatus are shown for automatically adjusting a response bandwidth and input sensitivity of a communications receiver responsive to a frequency of a received data signal. The response bandwidth is adjusted by switching a low pass filter into a receive path of the receiver when the received data signal is a low speed data signal and switching the low pass filter out of the receive path when the received data signal is a high speed data signal. The input sensitivity is adjusted by either changing a detection threshold of a comparator in the receive path or varying a gain of an input amplifier in the receive path. The high speed data signal is discerned when the low pass filter limits the response bandwidth of the receiver by a mode selection circuit which examines the duration of multiple pulses in a pulse train in the received data signal.

A process for forming an electronic device includes placing a substrate adjacent to a heating element and a deposition source, wherein the deposition source lies between the substrate and the heating element. In one embodiment, the process also includes sending a multiple pulsed signal to the heating element such that the heating element is on and off for a plurality of times. In another embodiment, the process also includes sending a signal to the heating element and depositing a layer over the substrate. Either or both processes further includes depositing a layer over the substrate. Depositing occurs as a result of sending the multiple pulsed signal to the heating element. The layer includes a material from the deposition source.

A method of cleaning and polishing an alloy comprising at least one noble metal and at least one non-noble metal, the method including the steps of submerging said alloy in an electrolytic acidic bath comprising at least one chelating or complexing agent including sulfur, and applying a multiple pulse periodic reverse waveform, and articles cleaned and/or polished thereby.

A multiple pulsed dose drug delivery system for pharmaceutically active amphetamine salts, comprising an immediate-release component and an enteric delayed-release component wherein (1) the enteric release coating has a defined minimum thickness and/or (2) there is a protective layer between the pharmaceutically active amphetamine salt and the enteric release coating and/or (3) there is a protective layer over the enteric release coating. The product can be composed of either one or a number of beads in a dosage form, including either capsule, tablet, or sachet method for administering the beads.

The invention discloses a radar detection method based on generalized keystone transformation and non-coherent accumulation, wherein the method mainly solves the detection problem of a high speed and highly accelerated target in a strong Gaussian white noise background. The method is implemented by the following steps: (1) generating radar target multiple-pulse echoes with Gaussian white noise added, and performing frequency domain pulse compression; (2) correcting range curvature of the pulse-compressed echoes by using the generalized keystone transformation; (3) performing fuzzy compensation on the curvature-corrected echoes by using a fuzzy factor; (4) performing non-coherent accumulation on the fuzzy-compensated echoes, and performing velocity compensation and slow time dimensional quadratic term compensation on the echoes by using a target velocity obtained in the non-coherent accumulation; (5) performing coherent accumulation on the slow time dimensional quadratic term compensated echoes to obtain the target to be detected. The method provided in the invention can eliminate effects of the range curvature and migration of the echoes on energy accumulation, can reduce computation of velocity search, and can be used in the detection of the target in the strong Gaussian white noise background.

A compression ignition engine is supplied with a first fuel in a flow of air and a second fuel is injected into the combustion chamber. The first fuel comprises a more volatile fuel than diesel such as ethanol, LPG or other combustible gas; the second fuel comprises diesel or biodiesel; and the second fuel is injected in multiple pulses in each ignition cycle with the first pulse acting as a pilot pulse to trigger ignition, and the timing of the second pulse being such as to modify the temperature through evaporation of the second fuel and thereby reduce the combustion temperature and mitigate knock susceptibility. Preferably the pilot pulse is followed by a single further pulse of the second fuel in the ignition cycle. The engine may be controlled to operate in two different modes, one mode for light and medium load conditions when there is only a pilot pulse injection of the second fuel which reduces NO_x and soot emissions, and the other mode for higher load conditions when there is a pilot pulse injection followed by a main pulse injection of the second fuel. The first fuel may comprise bioethanol and or one or more of the following: ethanol, butanol, propanol, lpg, natural gas, hydrogen.

The invention discloses a broadband radar detection method based on weighted sequence statistics and multiple-pulse coherence accumulation. The method can be used to mainly solve a detection problem under an unknown scene of a high-speed moving target space distribution state. The method is characterize by: generating broadband radar target multipulse echo with clutter and performing FFT to the echo along a distance domain; calculating a clutter normalization covariance matrix; performing prewhitening processing and chirp-z transformation to distance frequency domain data; estimating a target speed and performing phase-coherent accumulation; performing IFFT to the pulse which is performed with the phase-coherent accumulation; calculating each distance unit square envelope of the pulse and performing descending order; carrying out weighted processing to the data after being performed with the descending order; initializing a counter; calculating the adaptive matched filter energy accumulation of a counting distance unit; detecting whether the target exists according to a threshold. By using the method of the invention, the clutter can be effectively inhibited. Migration through resolution cell of the echo can be corrected. Through descending-order weighted processing, the radar can rapidly detect the target under the unknown target space distribution state.

The application relates to an ion trap mass spectrometer. An apparatus 41 and operation method are provided for an electrostatic trap mass spectrometer with measuring frequency of multiple isochronous ionic oscillations. For improving throughput and space charge capacity, the trap is substantially extended in one Z-direction forming a reproduced two-dimensional field. Multiple geometries are provided for trap Z-extension. The throughput of the analysis is improved by multiplexing electrostatic traps. The frequency analysis is accelerated by the shortening of ion packets and either by Wavelet-fit analysis of the image current signal or by using a time- of-flight detector for sampling a small portion of ions per oscillation. Multiple pulsed converters are suggested for optimal ion injection into electrostatic traps.

Continuous monitoring and fault diagnosis of rotating machinery during variable speed operation is performed using only a position feedback signal. The position sensor generates a periodic waveform having multiple pulses per revolution of the machine. A circuit is included to detect, for example, a zero crossing or edge of the periodic waveform. At each detected zero crossing or edge, the time and position of the event is stored in memory. Other data, such as the current in the motor, may also be sampled and stored in memory. Because the sampled data is triggered by repeated feature of the position feedback signal, the sampled data is in a stationary reference frame in the position domain. Frequency analysis is performed on the sampled data, and the frequency components present in either the sampled signal are analyzed to identify the presence of a fault in the rotating machinery.

Capacitor based pulse forming networks and methods are provided which require fewer inductors are that pulsed more frequently to provide a smaller, lower mass, and lower inductance pulse forming network having better pulse shaping characteristics than conventional pulse forming networks. In one implementation, the invention can be characterized as a capacitor based pulse forming network comprising a plurality of inductors adapted to be coupled to a load, a plurality of capacitor units, and a plurality of switches. Each switch couples a respective capacitor unit to a respective inductor, wherein multiple capacitor units are coupled to each inductor by separate switches. The plurality of switches are adapted to non-simultaneously discharge at least some of the multiple capacitor units to provide non-simultaneous pulses through a given inductor to the load and not through other inductors. The non-simultaneous pulses form at least a portion of an output pulse waveform to the load.