141 results about "Pulse delay" patented technology

Systems, devices, and methods described herein relate to generation and delivery of pulsed waveforms, e.g., for therapy delivery in soft tissue ablation procedures. In some embodiments, a pulse generator is configured to generate a voltage pulse train including a plurality of biphasic pulses, each biphasic pulse of the plurality of biphasic pulses including a positive pulse, a negative pulse, and an inter-phase delay separating the positive pulse and the negative pulse. In some embodiments, successive biphasic pulses of the plurality of biphasic pulses can be separated by a pulse-to-pulse delay such that the plurality of biphasic pulses is separated by a plurality of pulse-to-pulse delays, and the plurality of pulse-to-pulse delays can include increasing or decreasing sequences of pulse-to-pulse delays.

A method for ablating tissue by applying at least one pulse train of pulsed-field energy. The method includes delivering a pulse train of energy having a predetermined frequency to cardiac tissue, the pulse train including at least 60 pulses, an inter-phase delay between 0 μs and 5 μs, an inter-pulse delay of at least 5 μs, and a pulse width of 5 μs.

A method for ablating tissue by applying at least one pulse train of pulsed-field energy. The method includes delivering a pulse train of energy having a predetermined frequency to cardiac tissue, the pulse train including at least 60 pulses, an inter-phase delay between 0 μs and 5 μs, an inter-pulse delay of at least 5 μs, and a pulse width of 5 μs.

Systems, devices, and methods described herein relate to generation and delivery of pulsed waveforms, e.g., for therapy delivery in soft tissue ablation procedures. In some embodiments, a pulse generator is configured to generate a voltage pulse train including a plurality of biphasic pulses, each biphasic pulse of the plurality of biphasic pulses including a positive pulse, a negative pulse, and an inter-phase delay separating the positive pulse and the negative pulse. In some embodiments, successive biphasic pulses of the plurality of biphasic pulses can be separated by a pulse-to-pulse delay such that the plurality of biphasic pulses is separated by a plurality of pulse-to-pulse delays, and the plurality of pulse-to-pulse delays can include increasing or decreasing sequences of pulse-to-pulse delays.

The invention relates to the technical field of signal processing, in particular to a radar antenna signal processing method and system, and the method comprises the following steps: collecting an antenna time domain echo extraction channel energy curve, calculating the initial phase attenuation curvature of a period length energy peak value, and building an interference characteristic parameter set; matching real-time echoes, judging homology, eliminating interference, extracting main echoes, extracting main peak position spacing through frequency spectrum transformation, calculating a judgment threshold, comparing, and judging and executing decoupling operation to obtain target frequency spectrum data. According to the method, by extracting Doppler channel coherent energy distribution and establishing a periodic interference characteristic parameter set, the intrinsic characteristics of periodic interference can be accurately described, rapid judgment and effective stripping of interference source homology are achieved, and by analyzing the Doppler center frequency change trend and generating a pulse delay compensation quantized value, the interference source homology can be quickly judged and effectively stripped. The stable target identification and frequency decoupling operation under the interference background is realized, and the target identification and frequency control level in the variable environment is obviously enhanced.

Systems, devices, and methods described herein relate to generation and delivery of pulsed waveforms, e.g., for therapy delivery in soft tissue ablation procedures. In some embodiments, a pulse generator is configured to generate a voltage pulse train including a plurality of biphasic pulses, each biphasic pulse of the plurality of biphasic pulses including a positive pulse, a negative pulse, and an inter-phase delay separating the positive pulse and the negative pulse. In some embodiments, successive biphasic pulses of the plurality of biphasic pulses can be separated by a pulse-to-pulse delay such that the plurality of biphasic pulses is separated by a plurality of pulse-to-pulse delays, and the plurality of pulse-to-pulse delays can include increasing or decreasing sequences of pulse-to-pulse delays.

The invention relates to the technical field of distributed pulse control, in particular to a complex network distributed containment pulse control method and system based on dual-channel attack and a computer readable storage medium, and the method comprises the steps: building a complex dynamic network and a leader node; pinning nodes are selected from the complex dynamic network; constructing a distributed delay containment pulse controller; constructing an error network; and solving the distributed control intensity, the pulse interval and the pulse time delay of the distributed delay contained pulse controller based on a constraint condition for stabilizing the global index of the error network to obtain a target distributed delay contained pulse controller. The distributed delay containment pulse controller constructed by the invention enables the network to quickly realize synchronization under the combined action of dual-channel fraud attacks, thereby improving the network security and reducing the control cost on the aspects of time and space.

The invention discloses a multi-channel high-precision time sequence pulse transmitting system, and the system comprises a control panel which comprises a command receiving control unit and a time sequence generation unit; the command receiving control unit is configured to receive a control command and analyze the control command into pulse basic information; the time sequence generation unit is configured to receive the pulse basic information, generate a coarse delay pulse signal according to the pulse basic information, and generate a driving signal; the daughter board comprises a pulse precise delay unit and an optical port output unit; the pulse fine delay unit is configured to receive the driving signal, perform fine delay adjustment on the coarse delay pulse signal and generate a time pulse sequence; the optical port output unit is configured to receive the time pulse sequence and convert the time pulse sequence into an optical signal. The delay precision of the system can be effectively improved.

Systems, devices, and methods described herein relate to the generation and delivery of pulse waveforms, e.g., for therapy delivery in soft tissue ablation procedures. In some embodiments, a pulse generator is configured to generate a voltage pulse train comprising a plurality of dual-phase pulses, each dual-phase pulse of the plurality of dual-phase pulses comprising a positive pulse, a negative pulse, and an inter-phase delay separating the positive pulse and the negative pulse. In some embodiments, successive biphasic pulses of the plurality of biphasic pulses may be separated by a pulse-to-pulse delay, such that the plurality of biphasic pulses are separated by a plurality of pulse-to-pulse delays, and the plurality of pulse-to-pulse delays may include an increasing or decreasing sequence of pulse-to-pulse delays.

The invention provides a geographic information surveying and mapping data processing method and system, and the method comprises the steps: obtaining terrain superpixels, carrying out the segmentation operation of the terrain superpixels, obtaining terrain superpixel blocks, carrying out the pulse frequency coding operation of the terrain superpixel blocks, obtaining a pulse frequency sequence, and carrying out the pulse delay coding operation of the terrain superpixel blocks. The method comprises the steps of obtaining a pulse frequency sequence, obtaining a pulse delay sequence, adjusting pulse density through terrain superpixels, obtaining pulse density, carrying out feature integration on the pulse frequency sequence, the pulse delay sequence and the pulse density, and obtaining a structured feature tensor. The method comprises the following steps: obtaining original point cloud data, carrying out position calibration on the original point cloud data through equipment movement track data, carrying out feature extraction on original point cloud according to a structured feature tensor, obtaining a terrain block map with a classification label, and improving the accuracy of geographic information surveying and mapping data while ensuring terrain continuity.

The invention provides an asynchronous pulse signal generation circuit. The asynchronous pulse signal generation circuit comprises a first latch input control module, a pulse delay module, a second latch input control module and a latch module, the first latch input control module outputs a first control signal of a level hopping signal and a level non-hopping signal when detecting that the edge of an input signal occurs, and the pulse delay module generates an output signal and a delay control signal according to the first control signal. The second latch input control module generates a second control signal according to the output signal and the delay control signal, and the latch module outputs a feedback signal according to the first control signal and the second control signal to indicate the first latch input control module to jump the level state of the level jump signal back to the original level state. Therefore, the pulse delay module outputs the pulse signal with the preset pulse width, and a good solution is provided for operation control of the storage unit.

The invention discloses an integrated circuit standard unit time sequence arc pulse delay measurement system, which comprises an on-chip clock generation module used for generating a high-frequency clock on a chip as a reference counting clock; according to the on-chip standard unit time sequence arc generation circuit, pulse broadening of time sequence arcs is achieved through a multi-stage cascaded circuit structure of the same time sequence arcs, and single time sequence arc delay is measured through superposition of multi-stage same time sequence arc delay; the on-chip time sequence arc counting circuit is used for counting the broadened time sequence arc pulses by using an on-chip high-frequency clock as a reference clock; the on-chip input and output module is used for controlling the selection of various integrated circuit standard unit types, the selection of time sequence arcs and the output of the counter; and the wafer circuit testing machine is used for performing wafer-level electrical connection by using a wafer circuit testing probe, supplying power to the integrated circuit standard unit and inputting and outputting signals. According to the invention, integrated circuit standard cell time sequence arc measurement and measurement of all time sequence arcs of all standard cells in a standard cell library are realized.

The invention relates to the technical field of wafer laser cutting, and provides a dual-laser synchronous coaxial modified stripping device and a dual-laser synchronous coaxial modified stripping method.The dual-laser synchronous coaxial modified stripping device comprises a mobile platform, a first pulse laser system, a second pulse laser system and a pulse delay regulation and control system; the moving platform can move the to-be-stripped part along a plurality of different directions; the first pulse laser system emits ultrashort pulse laser to the to-be-stripped part through a first light path, so that an initial modified layer is formed in the to-be-stripped part; the second pulse laser system synchronously emits continuous laser to the to-be-stripped part through a second light path, so that the initial modified layer is heated to form a cracked complete modified layer; the pulse delay regulation and control system is arranged in the first light path and used for regulating and controlling the pulse delay of the first pulse laser system. The latter can be suitable for the former, the stripping efficiency of the semiconductor crystal ingot can be improved, and quality stripping is improved.

The invention relates to the technical field of laser splitting, and provides a dual-laser synchronous coaxial modified stripping device which comprises a mobile platform, a first pulse laser system, a second pulse laser system and a pulse delay regulation and control system, the moving platform can move the to-be-stripped part along a plurality of different directions; the first pulse laser system emits ultrashort pulse laser to the to-be-stripped part through a first light path, so that an initial modified layer is formed in the to-be-stripped part; the second pulse laser system synchronously emits continuous laser to the to-be-stripped part through a second light path, so that the initial modified layer is heated to form a cracked complete modified layer; the pulse delay regulation and control system is arranged in the first light path and comprises a plurality of regulation and control parts which are arranged in the first light path at intervals in the same straight line direction; and the plurality of regulation and control parts are used for enabling the ultrashort pulse laser irradiated in the pulse delay regulation and control system to form at least two different optical path differences, and mutually interfere in the pulse delay regulation and control system to form pulse delay.

Systems, devices, and methods described herein relate to generation and delivery of pulsed waveforms, e.g., for therapy delivery in soft tissue ablation procedures. In some embodiments, a pulse generator is configured to generate a voltage pulse train including a plurality of biphasic pulses, each biphasic pulse of the plurality of biphasic pulses including a positive pulse, a negative pulse, and an inter-phase delay separating the positive pulse and the negative pulse. In some embodiments, successive biphasic pulses of the plurality of biphasic pulses can be separated by a pulse-to-pulse delay such that the plurality of biphasic pulses is separated by a plurality of pulse-to-pulse delays, and the plurality of pulse-to-pulse delays can include increasing or decreasing sequences of pulse-to-pulse delays.

The invention discloses a PWM waveform output device supporting a single pulse mode and an application method thereof.The device comprises a register module, a pulse number control processing module and a pulse delay control processing module, and the register module is connected with the control end of the pulse number control processing module and the control end of the pulse delay control processing module; input PWM square waves firstly enter the pulse number control processing module for number control, and then are subjected to delay control through the pulse delay control processing module to obtain output PWM square waves. On the basis that the high-precision pulse width modulator outputs PWM square waves with adjustable frequency and duty ratio, the PWM waveforms with fixed delay and quantity are automatically output through mode enabling after relevant configuration is carried out according to user requirements, it is ensured that the specific requirements of users are met, and the phenomenon of repeated sampling is avoided.

The invention discloses an overcurrent protection circuit for a power tube. The overcurrent protection circuit comprises a reference voltage terminal, a first comparator, a single-side delay circuit, an anti-spike pulse delay circuit and a logic circuit. The anti-spike pulse time-delay circuit comprises an external capacitor arranged between a reference voltage terminal and a reference ground, and is used for charging the external capacitor according to a time-delay control signal and generating an effective second indication signal when the capacitance voltage of the external capacitor rises to a reference voltage threshold. Therefore, the anti-spike pulse delay time of the circuit is controlled. In the overcurrent protection circuit of the embodiment, a user can set different anti-spike pulse delay times in the circuit through the external capacitance value arranged outside the chip, so that the circuit can be adjusted according to application scenes of different power devices, and the stability and the reliability of the circuit are improved.

The application discloses a kind of delay pulse generation device, method and electronic equipment based on FPGA chip, field programmable gate array FPGA chip has M delay units, the device includes: clock generation module, for generating reference clock, output clock and delay clock;Pulse generation module, for generating first output pulse according to reference clock;Delay adjustment module, for first output pulse is delayed adjustment according to delay clock, obtains second output pulse, wherein, delay adjustment module includes N delay units, N is less than or equal to M positive integer;And serial conversion module, for second output pulse is converted into parallel according to reference clock and output clock, and output delay pulse sequence.The device is based on FPGA chip internal logic to realize sub-nanosecond delay adjustment, generates sub-nanosecond delay pulse sequence, and the requirement level of peripheral circuit is low, with the advantages of low cost, simple structure, easy to realize.

The invention relates to a parallel multi-beam pulse laser welding device and a working method. A workbench is used for bearing a to-be-machined material, and a moving mechanism drives a fusion welding mechanism to achieve lifting motion and front-back and left-right movement on the horizontal plane. The fusion welding mechanism executes laser welding and is provided with at least one set of laser heads, and laser beams generated by the laser transmitter are sent into the laser heads through the modulator. In the modulator, after a laser beam generated by a laser transmitter sequentially passes through a beam expanding device, an energy control system, a reflecting mirror and a first semi-transparent and semi-reflecting mirror, one path of light enters a pulse delay device driven by a one-dimensional motion platform to adjust pulse delay, and the other path of light is reflected and converged and then is shaped into a flat-topped light beam through an aspheric surface shaping system; and after the light passes through the second semi-transparent and semi-reflecting mirror, one part of the light enters the image acquisition module driven by the one-dimensional motion platform to control focusing imaging, and the other part of the light enters the laser head after being diffracted by the concave lens.

The present invention discloses a method for reference clock phase synchronization and fine adjustment and a pulse generator. The method includes: Step 3, the host computer or the accelerator control system issues parameter configuration; Step 4, determine the reference clock selection mode; Step 5, when an external reference clock is selected, the pulse generator receives an external reference clock signal with a frequency of 10 MHz to 500 MHz; Step 6, according to the pulse parameter values set in Step 3, calculate the theoretically pulse repetition frequency count value, pulse width count value, and pulse delay count value. The present invention calculates the theoretically pulse repetition frequency count value, pulse width count value, and pulse delay count value through the parameter configuration issued by the host computer or the accelerator control system, enabling the pulse generator to generate stable and adjustable pulse signals with ns-level precision and to maintain phase synchronization with the input reference clock under different working conditions to meet different particle acceleration and control requirements.

The invention relates to an optical storage unit (1) for an optical computing unit (2), comprising a signal input (3), a signal output (4) and n connecting paths (5) arranged between the signal input (3) and the signal output (4), wherein the signal input (3) is designed to divide a useful signal into n pulses, a first pulse P n-1 is transmitted via a first connecting line (5A), a second pulse P n The transmission is carried out via a second connecting line (5B) that is different from the first connecting line (5A). the second connecting path (5B) has at least one property different from the first connecting path (5A), such that the second pulse P n relative to the first pulse P n-1 is delayed by the storage time Δt, and the signal output (4) is designed to transmit the pulses P n and P n-1to provide for further processing or the Pulse P n and P n-1 to combine into a single overall signal and to make the overall signal available for further processing. In this way, an optical storage unit is provided that can be integrated into a complete optical system, thus increasing the performance of the overall system.

The invention relates to the technical field of all-solid-state lasers, and particularly provides a master-slave pulse delay controllable ultraviolet dual-wavelength double-pulse laser, which comprises a pumping source and a V-shaped folded resonant cavity, and is characterized in that the V-shaped folded resonant cavity comprises an input mirror, a gain medium, a Q-switched crystal, a total reflective mirror, a frequency doubling crystal and an output mirror; wherein the Q-switched crystal performs step-type modulation through a double-step electric signal, the double-step electric signal sequentially comprises a high-voltage stage, a low-voltage stage and a voltage-reducing stage in a modulation period, and the double-step electric signal sequentially generates jump from the high-voltage stage to the low-voltage stage and jump from the low-voltage stage to the voltage-reducing stage in a pumping period. The dual-wavelength master pulse and the dual-wavelength slave pulse are respectively output, and the time delay between the dual-wavelength master pulse and the dual-wavelength slave pulse can be controlled by adjusting the duration of the low-voltage phase. According to the invention, ultraviolet dual-wavelength double-pulse output is realized, and master-slave pulse delay is flexible and controllable.

The invention provides a double-pulse laser engraving method and device, and relates to the technical field of laser engraving, the double-pulse laser engraving method and device are used for engraving a gravure forme.The engraving method comprises the steps that the wavelength of femtosecond pulse laser and the wavelength of picosecond pulse laser are determined; determining the pulse delay of the femtosecond pulse laser and the picosecond pulse laser; determining a to-be-engraved area of the gravure plate; adjusting the optical path length of the femtosecond pulse laser and / or the picosecond pulse laser according to the pulse delay; synthesizing the femtosecond pulse laser and the picosecond pulse laser into double-pulse laser by using a polarization beam splitting cube; and ablating the to-be-engraved area according to the double-pulse laser. The femtosecond pulse laser is short in wavelength and high in energy, so that a to-be-engraved area can be pre-ablated quickly, when ungasified plasma is formed in the pre-ablated area, the picosecond pulse laser is used for performing secondary ablation on the pre-ablated area, the machining quality of the gravure plate can be guaranteed, the area of a heat affected area can be controlled, and the etching precision of an etched pattern can be improved.

Waveform characteristics of pulses in a pulse train configured to cause pulsed field tissue ablation may be varied in a manner that improves electromagnetic compatibility while retaining treatment efficacy. Such waveform characteristics may include pulse-to-pulse initiation intervals, inter-pulse delays, pulse on-times, pulse widths, inter-phase delays in the case of biphasic pulses, or a combination thereof. Such waveform characteristics may be varied in a random manner. Variations of waveform characteristics may be bounded by minimum, maximum, or both minimum and maximum differences between various pulses or pulse groups, or between various pulse trains or pulse train groups, for example, to help ensure sufficient stability of treatment signal waveforms while allowing sufficient variability, for example, to improve electromagnetic compatibility.

The invention relates to the technical field of lasers, in particular to a three-level adjustment linear frequency modulation laser pulse generation device which comprises M narrow linewidth lasers with different wavelengths, a pulse modulation module, a wavelength division chopping module and an acousto-optic frequency shift module. Compared with a traditional OTDR-based distributed optical fiber sound wave sensing technology, the method has the advantages that a higher sound wave sampling frequency can be obtained, and the sound wave sampling frequency can even be improved by more than 100 times under the condition that the sensing distance is particularly large; compared with the technology that a narrow linewidth laser of each wavelength adopts a set of independent modulation and frequency shift equipment, and then laser pulses of all wavelengths are combined, modulation and frequency shift of the laser pulses are completed only through one set of modulation and frequency shift equipment, and the material cost is greatly saved. Therefore, the problem of high hardware cost caused by adopting a multi-wavelength pulse delay modulation technology to improve the sampling frequency is solved.

The invention discloses a novel picosecond-level digital delay pulse generator hardware design, relates to the technical field of signal measurement, and is applied to delay and generation of digital pulses. Comprising an external trigger interface circuit which is used for converting an external signal into a level signal which can be identified by SerDes of an FPGA; the FPGA master control module is used for receiving and sending pulses; the whole hardware design integration is high, the delay accuracy reaches 10ps when the pulse delay is set to be 1us, the jitter RMS value is 10.7 ps, the minimum delay time is not larger than 30ns, and the bandwidth for processing pulse signals can reach 29GHz.

The present invention relates to the field of microgrid control technology, and discloses an intelligent cloud-edge collaborative microgrid control system. In a time period before a water pump contactor closing signal is detected, the rate of change of the zero-sequence voltage per unit time is measured at fixed time intervals; the presence of a zero-sequence cross-reverse jump is determined based on the rate of change, and the jump moment of the zero-sequence cross-reverse jump is recorded; a virtual reactance is generated based on the polarity of the rate of change of the zero-sequence cross-reverse jump, and the virtual reactance is injected into the DC bus through an inverter; the presence of a DC negative pulse delayed zero crossing is determined based on the bus current, and the negative pulse energy corresponding to the DC negative pulse delayed zero crossing is estimated; the negative pulse energy is used as a control quantity, combined with a preset phase shift angle, and the control quantity is fed back to the water pump motor according to a preset power curve; after the feedback continues for a preset feedback time, the zero-sequence voltage and the DC bus current are obtained, and when the zero-sequence voltage and the DC bus current return to the normal operating range, the normal control mode is returned.

To provide a pulse width measuring circuit with which a measurement time is shortened.SOLUTION: A first programmable delay circuit 130 and a second programmable delay circuit 140 respectively delay a first pulse S1 and a second pulse S2 corresponding to an input pulse SIN and generate a first delay pulse Sd1 and a second delay pulse Sd2. A latch circuit 150 latches the first delay pulse Sd1 in response to an edge of the second delay pulse Sd2. A controller 160 continuously sweeps a delay amount τ2 of the second programmable delay circuit 140 in first processing, and detects a first delay mount τP when the output Q of the latch circuit 150 changes. In second processing, the delay amount τ2 of the second programmable delay circuit 140 is changed by a binary search and a second delay amount τn is detected when the output Q of the latch circuit 150 changes. The difference between the first delay amount τP and the second delay amount τn is made a pulse width Tp of the input pulse SIN.SELECTED DRAWING: Figure 1

Provided herein are systems, devices, and methods for delivering electroporation energy to treat target tissue. The system includes a generator for providing an electroporation waveform. The generator includes a signal generator for generating the electroporation waveform and a controller for providing signaling that causes the signal generator to generate the electroporation waveform. The system further includes a catheter including at least one catheter electrode. The signal generator provides the electroporation waveform to the at least one catheter electrode. The electroporation waveform includes a plurality of energy pulses, and each energy pulse is separated by an inter-pulse delay period.

The present invention provides an independently controllable laser time-sharing and light-splitting system, comprising a laser light source, at least two light-splitting optical paths and a digital pulse delay generator; each light-splitting optical path comprises an electro-optic modulator and a polarization beam splitter, and each light-splitting optical path is arranged in sequence; the laser light source emits a laser pulse of a certain frequency, which passes through the electro-optic modulator and the polarization beam splitter of the first to the last light-splitting optical paths in sequence, and the electro-optic modulator splits part of the laser pulse and outputs it from the polarization beam splitter; the digital pulse delay generator is used to trigger the laser pulse, set the frequency of the laser pulse, and the frequency and delay of the electro-optic modulator of each light-splitting optical path. The present invention utilizes an electro-optic modulator and a polarization beam splitter to realize the beam splitting of the laser, while each light-splitting optical path is independent of each other, solving the problem that the traditional light-splitting optical path cannot process different graphics, and the light paths after the light splitting affect each other, resulting in low processing efficiency.