19 results about "Delayed pulse" patented technology

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.

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 provides an experimental simulation system of an equivalent wind shear wind field. According to the system, pulse light signals emitted by a wind measurement laser radar are simulated through different delay optical fibers to reach atmospheric stratification at different positions, then delayed pulse light is emitted to different positions of the side face of a rotating disc rotating at a constant speed, and echo signals obtain Doppler frequency shifts of different sizes due to different radial speeds; based on this, the change of wind speed in wind shear is simulated. A required equivalent wind shear wind field can be customized by adjusting the length of the delay optical fiber, the diameter of the turntable and the incident position of light on the side surface of the turntable. The system is simple in structure and low in cost, and can provide an equivalent wind shear wind field with accurate and controllable wind speed and abundant changes.

The application discloses a signal sampling method, device and equipment of digital PET, and a storage medium. The signal sampling method of the application comprises the following steps: performing delay processing on pulse signals input to multiple channels, and obtaining multiple delay pulse signals; switching the multiple channels based on the multiple delay pulse signals, and obtaining comparison signals; and performing time-to-digital conversion processing on the comparison signals to extract time information. According to the scheme of the embodiment of the application, the multiplexing of time-to-digital converters among multiple channels can be realized in the FPGA, information loss is not caused, the resource usage of the FPGA is reduced, and the time measurement precision and system integration are improved.

A method, apparatus and system for processing a wafer in a plasma chamber system, which includes at least a plasma generating element and a biasing electrode, include generating a plasma in the plasma chamber system by applying a source RF source power to the plasma generating element for a first period of time of a pulse period of the RF source power, after the expiration of the first period of time, removing the source RF source power, after a delay after the removal of the RF source power, applying an RF bias signal to the biasing electrode for a second period of time to bias the generated plasma towards the wafer, and after the expiration of the second period of time, removing the RF bias signal from the biasing electrode before a next pulse period of the RF source power. The generated plasma biased toward the wafer is used to process the wafer.

The application provides a time coding compressed sensing imaging method and device based on FPGA and electronic equipment, the method is applied to the technical field of photoelectric detection and computational imaging, and the method comprises the steps of: calibrating an FPGA delay unit based on a reference clock, constructing a delay lookup table and writing a time coding sequence of random coding and a push-scan mode. In response to a synchronization signal, coarse and fine delay tap values are analyzed, a reference pulse is generated and is synchronized to the reference clock, a delay pulse is generated through fine delay, three alignment timing control signals are generated, and the excitation gate and exposure signals are cooperatively controlled. Discrete integral observation values are collected in an exposure window, a continuous observation operator is constructed in combination with the delay lookup table, a target function is constructed based on physical priori, and the target function is iteratively solved to obtain a high signal-to-noise ratio, a transient response curve and physical parameters. The method can solve the problems of slow sampling speed and lack of software flexibility due to dependence on modulation devices in traditional hyperspectral imaging technology.

Provided is a pulse generation circuit that receives a clock signal and outputs a delayed pulse signal, including: a first delay-locked loop circuit that receives the clock signal and generates a first delay signal obtained by delaying the clock signal; a second delay-locked loop circuit that generates a second delay signal with reference to the first delay signal; and an output circuit that outputs the delayed pulse signal according to the first delay signal and the second delay signal. The second delay-locked loop circuit may have: a second charge pump that outputs a current according to the clock signal and the delayed pulse signal; and a second delay circuit that outputs the second delay signal obtained by delaying the clock signal according to a current output by the second charge pump.

This invention discloses a multi-delay mode delay pulse generation circuit, including a signal input unit, a signal processing unit, a pulse generation unit, and a pulse output unit. In the signal input unit, a logic processing circuit receives a level combination signal and a control pulse signal, and multiple signal output circuits are configured according to their combination. Each signal output circuit is connected to a delay selection circuit. In each delay selection circuit, a delay control signal is used to control the state of the delay selection switch, so that the signal delay processing circuit processes the signal output from the signal output circuit into a pulse signal DLY with a corresponding delay, which is then sent to the pulse generation unit. The pulse generation unit generates a detonation pulse based on the pulse signals DLY output from the multiple delay selection circuits. The pulse output unit outputs the detonation pulse to the detonation driving device. This invention enables the selection and setting of the delay of the driving pulse to provide pulse signals with different delays as needed, achieving precise control of the load switching time.

The present disclosure relates to a pipeline clock driving circuit, a computing chip, a computing power board and a computing device. A pipeline clock driving circuit is disclosed for providing a pulse clock signal for a pipeline, comprising: a plurality of stages of clock driving circuits, each stage for providing a pulse clock signal for a corresponding operation stage of the pipeline; a clock source coupled to an input of a first stage of the clock driving circuits, each stage of the clock driving circuits comprising: a flip-flop coupled to an input of the stage of the clock driving circuits; a delay module comprising a first delay submodule for delaying a pulse signal output by the flip-flop and feeding back the delayed pulse signal to the flip-flop as a feedback pulse signal; and a combinational logic module for performing a combinational logic operation on the pulse signal and the feedback pulse signal to generate the pulse clock signal for providing to the corresponding operation stage, wherein the delay module further comprises a second delay submodule for delaying the pulse signal and outputting the delayed pulse signal to a next stage of the clock driving circuits.

A dynamic torsion-tension / compression synchronous combined loading device and loading method, through a delay pulse generator, a torsional wave and a tensile / compressive wave are simultaneously arrived at a sample, and finally a torsion, a tensile / compressive composite dynamic loading is realized. In the application, energy is stored through a rotating torque loading mechanism, and the size of the energy is obtained in real time through a strain flower pasted on a torsional incident rod. After the energy storage is completed, the clamping bolt of the rotating clamping mechanism is clamped to make the broken bolt be broken under tension, so that the energy stored in the energy storage section of the torsional incident rod is transmitted to the sample in the form of a stress wave, the strain flower located on the torsional incident rod can record the waveform of the torsional wave, and the sample is dynamically torsionally loaded when the torsional wave reaches the sample. Through accurate control of the delay time, the torsional wave and the tensile wave can be simultaneously arrived at the sample, and the dynamic tensile-torsion composite loading of the sample is realized. A data collector simultaneously records the stress wave pulse signals on the torsional incident rod and the tensile incident rod.

The invention relates to the technical field of fault detection, in particular to a discharge fault positioning system, a discharge fault positioning method, discharge fault positioning equipment and a medium, and the discharge fault positioning system comprises a laser, a first acoustic optical modulator, a second acoustic optical modulator, an optical amplifier, a balanced photoelectric detector and an acquisition card. One part of the first pulse sequence is delayed to obtain a delayed pulse sequence, the remaining first pulse sequence is modulated to obtain a second pulse sequence, the two parts of pulse sequences are amplified and then injected into the sensing optical fiber to obtain a target signal, and the sensing optical fiber is arranged on the outer surface of the GIL pipeline to be detected and converts the target signal into a voltage signal; and carrying out discharge fault positioning according to the voltage signal. Therefore, the problems that the GIL discharge fault positioning technology is high in cost and low in reliability, and long-distance GIL discharge fault positioning is difficult to achieve are solved, and the GIL discharge fault positioning method can cover the length of several kilometers and is easy to install, accurate in positioning and high in reliability.

A control signal generation circuit 5 according to one embodiment comprises: an insulated gate driver that is configured to output a control pulse signal corresponding to a common input pulse signal to first and second switching elements; a delay signal generation unit that is configured to generate at least one delay pulse signal using the control pulse signal; and a logic synthesis unit that is configured to generate first and second control pulse signals by performing different logic synthesis on two signal sets among a plurality of signal sets that are defined by the at least one delay pulse signal and the control pulse signal, wherein the first control pulse signal is different from the control pulse signal, and the second control pulse signal is different from the control pulse signal and the first control pulse signal.

This invention discloses a pulse density modulation full-bridge converter capable of eliminating inter-frequency harmonics, belonging to the field of power electronic control technology. The pulse density modulator provided by this invention includes an adder for adding a pulse density command signal and a feedback signal to obtain a signal to be quantized, x. A quantizer quantizes the signal to be quantized, x, to obtain a pulse signal, a. A register delays pulse signal a by half a switching cycle to generate a pulse signal, b. Pulse signals a and b are input into an XOR gate and then subtracted from the signal to be quantized, x, to obtain a quantization error, e. The quantization error, e, is then filtered by a digital filter to obtain a feedback signal. Pulse signals a and b control the switching state of the full-bridge converter. This invention can be applied to various resonant converters, controlling the converter's output voltage or power through pulse density modulation; it can eliminate inter-frequency harmonics based on the resonant network, avoiding oscillation and ensuring stable converter operation.

The present application relates to the technical field of fault detection, and particularly relates to a discharge fault positioning system, a discharge fault positioning method, equipment and a medium, wherein the discharge fault positioning system comprises a laser, a first / second acousto-optic modulator, an optical amplifier, a balanced photodetector and a collection card; the laser is split after being modulated into a first pulse sequence; a part of the first pulse sequence is delayed to obtain a delayed pulse sequence; the remaining first pulse sequence is modulated to obtain a second pulse sequence; the two pulse sequences are amplified and then injected into a sensing optical fiber to obtain a target signal; the sensing optical fiber is arranged on the outer surface of a GIL pipeline to be detected, and the target signal is converted into a voltage signal; and the discharge fault is positioned according to the voltage signal. Thus, the problem that the GIL discharge fault positioning technology has high cost, low reliability and is difficult to realize long-distance GIL discharge fault positioning is solved; the present application can cover a length of several kilometers, is easy to install, has accurate positioning and high reliability.

This invention relates to a control method for well stratification, belonging to the field of oilfield production tools technology. The method controls the opening and closing of switches according to a pre-set timed stratification status schedule. During stratification, if the current stratum is identified before the scheduled time for the next stratum, a stratification adjustment pulse signal is emitted at the wellhead by changing the wellhead pressure. Upon detecting the adjustment pulse signal, the open switch closes, and the switch corresponding to the next stratum in the schedule opens. If the current stratum is not identified by the scheduled time for the next stratum, a delayed pulse signal is emitted at the wellhead. Upon detecting the delayed pulse signal, all switches do not perform any switching actions. This solution addresses the problem in existing technologies that cannot adjust the single-layer water-finding cycle in real time according to the production status of each oil layer.

This invention provides a method for handling gate pulse train contention timing. The method, developed based on an FPGA, includes the following steps: S1: Delaying the pulse modulation signal, and using the rising and falling edges of the delayed pulse modulation signal to trigger the generation of a leading-edge trigger pulse train and a turning-off leading-edge pulse train, respectively; S2: Widening the pulse modulation signal, and using the rising and falling edges of the widened pulse modulation signal to trigger the generation of a turning-off trailing-edge pulse train and a trailing-edge trigger pulse train, respectively; S3: Using the leading-edge trigger pulse and the turning-off trailing-edge pulse train to generate the rising edge of the secondary-side pulse modulation signal; using the trailing-edge trigger pulse train and the turning-off leading-edge pulse train to generate the falling edge of the secondary-side pulse modulation signal. This method effectively avoids the problem of gate drive waveform distortion caused by contention between leading and trailing-edge pulse trains under low repetition rate and wide pulse conditions.

The invention discloses a pulse width continuously adjustable double-gain series double-cavity solid laser and a working method thereof, and relates to the technical field of lasers. The laser comprises a main resonant cavity and a sub resonant cavity, the main resonant cavity is sequentially provided with a total reflective mirror, a first gain medium, a Q-switch and a main output mirror along a light path; the sub resonant cavity is arranged on an output light path of the main resonant cavity, and a second gain medium, an auxiliary output mirror and a displacement driving device are sequentially arranged along the light path; the auxiliary output mirror is installed on the displacement driving device. After the output pulse of the main resonant cavity is coupled into the sub resonant cavity, a plurality of delay pulse components are formed through repeated back-and-forth reflection, and broadened pulse is output after time domain superposition. The optical cavity length of the sub resonant cavity is adjusted through the displacement driving device, so that the output pulse width is continuously adjustable.

A distributed acoustic system (DAS) may include an interrogator that includes two or more lasers, a pulser module disposed after and connected to each of the two or more lasers, a wavelength division multiplexer (WDM), wherein each of the pulser modules are connected to the WDM as inputs, and a downhole fiber attached to the WDM as an output and wherein the downhole fiber includes at least one sensing fiber. A method for increasing a sampling frequency may include identifying a length of a downhole fiber connected to an interrogator, generating and launching a light pulse from each of the two or more lasers the pulser module, and delaying an output from the pulser module into the downhole fiber bykNseconds, where k is a pulse repetition interval of the pulser module and N is equal to the two or more lasers.

This invention discloses a continuously adjustable pulse width dual-gain tandem dual-cavity solid-state laser and its operating method, relating to the field of laser technology. The laser includes a main resonant cavity and a sub-resonant cavity. Along the optical path, the main resonant cavity sequentially comprises a total reflection mirror, a first gain medium, a Q-switching switch, and a main output mirror. The sub-resonant cavity is located along the output optical path of the main resonant cavity, and along this path, sequentially comprises a second gain medium, a secondary output mirror, and a displacement driving device. The secondary output mirror is mounted on the displacement driving device. After the output pulse from the main resonant cavity couples into the sub-resonant cavity, it undergoes multiple round-trip reflections to form multiple delayed pulse components, which are then superimposed in the time domain to output a broadened pulse. The output pulse width is continuously adjustable by adjusting the optical cavity length of the sub-resonant cavity through the displacement driving device.