632 results about "Pulse generator" patented technology

The invention relates to the technical field of hydraulic test of nickel alloy pipes, and discloses a hydraulic test system for a thin-wall nickel alloy pipe. According to the system, in the axial loading state of the thin-wall nickel alloy pipe, a closed water pressure cavity is established through an annular sealing clamp, and then strain distribution data on the surface of the pipe body is collected through a distributed optical fiber sensor array. And constructing a three-dimensional stress field reconstruction model based on the acquired strain distribution data, calculating an equivalent plastic deformation threshold value of the pipe body under different water pressure gradients, adjusting a water pressure loading curve slope parameter according to the equivalent plastic deformation threshold value, and generating a dynamic water pressure loading instruction. And the high-frequency pressure pulse generator executes the instruction, synchronously triggers the X-ray diffractometer to collect lattice distortion data of the tube body, inputs the data into the material microscopic damage evolution model, and outputs a microscopic defect spatial distribution map. And finally, material constitutive parameters of the three-dimensional stress field reconstruction model are corrected based on the atlas, closed-loop feedback control is formed, and multi-dimensional data acquisition and accurate management and control of the thin-wall nickel alloy pipe hydrostatic test are achieved.

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 present invention discloses a pulse generator and a pulse rod, which relate to the field of pulse circuit technology. The pulse generator includes a frequency control unit, a dual closed-loop pulse amplification unit, a digital signal processing unit and an adaptive power management unit. The frequency control unit includes an environmental sensor and a microcontroller. The microcontroller can calculate a preset pulse frequency based on information transmitted by the environmental sensor. The input end of the dual closed-loop pulse amplification unit can receive a pulse signal transmitted by the microcontroller, amplify it to a preset pulse frequency, and provide a pulse current to an electrostatic elimination needle. The digital signal processing unit can digitize the pulse signal to enhance the anti-interference ability of the pulse signal. The adaptive power management unit includes a dynamic voltage regulation module electrically connected to an external power supply, and the dynamic voltage regulation module can dynamically adjust the output voltage. The technical solution provided by the present invention can provide a pulse generator with high stability, a wide adjustment range and strong anti-interference ability.

A light-emitting diode (LED) control unit includes: a pulse generator configured to generate a pulse signal; a T-filter configured to convert the pulse signal into a triangular wave signal; a first gate driver configured to receive the triangular wave signal and output a first gate control signal; a second gate driver configured to receive the first gate control signal and output a second gate control signal; a first switch configured to turn on a first LED string corresponding to a first color temperature based on the first gate control signal; a second switch configured to turn on a second LED string corresponding to a second color temperature based on the second gate control signal; and a power supply circuit configured to supply a power supply voltage to the pulse generator, the first gate driver, and the second gate driver by stepping down an operating voltage of the LED driver.

A voltage-to-delay converter includes a first reset transistor having a first terminal coupled to a power supply terminal, a gate terminal receiving a reset signal, and a second terminal coupled to a top plate of a first integrating capacitor, and a second reset transistor having a first terminal coupled to a power supply terminal, a gate terminal receiving the reset signal, and a second terminal coupled to a top plate of a second integrating capacitor. First and second input transistors receive first and second input voltages, and are coupled between the top plate of the first and second integrating capacitors, respectively, and a first current source. A discharge current source is coupled to bottom plates of the first and second integrating capacitors. A pulse generator has first and second inputs coupled to the top plate of the first and second integrating capacitors, respectively.

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 field of electrical safety monitoring, in particular to an explosion-proof grounding resistance online monitoring system. The device comprises an explosion-proof housing, a pulse generator, a sensor, a microprocessor and a communication module. The explosion-proof housing is provided with a closed ground wire through hole. The pulse generator, the sensor and the microprocessor are all arranged in the explosion-proof shell, and the microprocessor is in communication connection with the pulse generator and the sensor; the communication module is in communication connection with the microprocessor; the microprocessor circularly monitors and calculates a grounding resistance value and a metal connection resistance value according to time set by a user, and actively uploads the values to a background monitoring center through the communication module. According to the invention, automatic and real-time resistance on-line measurement can be realized in an explosion-proof environment, an alarm can be given when a resistance value exceeds a threshold value, and a fault can be effectively identified.

The invention discloses a bionic wrist pulse generator, and relates to the technical field of medical instruments, the bionic wrist pulse generator comprises a wrist bionic structure and a blood vessel bionic structure, the wrist bionic structure comprises a bionic skin layer, a mounting layer and a supporting layer, and the mounting layer is arranged between the bionic skin layer and the supporting layer; when the device is used, the peristaltic pump draws liquid from the liquid groove and outputs the liquid into the elastic tube, the purpose of simulating pulse vibration signals of the wrist of the human body is achieved by adjusting parameters of the peristaltic pump, adjusting the flow of the liquid in the elastic tube and reproducing periodic signals, the three-stage branch network structure is designed, the first-stage branch simulates the arteriole, and the second-stage branch simulates the arteriole; the second-stage branch and the third-stage branch simulate a micro artery and a blood capillary respectively, and then a periodic signal is sensed on the bionic skin layer, so that the practice effect is achieved.

An example isolation measurement circuit includes a first switch connecting a first isolation resistor to a terminal of a measurement resistor, the first isolation resistor also connecting to a positive bus of a power distribution system. The isolation measurement circuit also includes a second switch connecting a second isolation resistor to the terminal of the measurement resistor, the second isolation resistor also connecting to a negative bus of the power distribution system. The isolation measurement circuit also includes a pulse generator that connects the measurement resistor to chassis ground.

The invention discloses a standard cell library delay test system and a test method thereof, the test system comprises a primary pulse generator, the clock input end of the primary pulse generator receives a test enable signal and generates a start pulse signal; the clock input end of each stage of trigger is connected to the output end of the previous stage of trigger, and the clock input end of the first stage of trigger receives an operation result of a starting pulse signal and an output signal of the last stage of trigger through a logic OR gate; the test system further comprises a feedback control module including a first phase inverter and a logic AND gate, the first phase inverter negates an output signal of any one trigger in the first three stages of the delay chain and then performs logic AND operation with a global reset signal, and a dynamic reset signal is generated and connected to the reset end of the primary pulse generator. According to the technical scheme, the trigger delay chains connected in series in multiple stages and the feedback control module are designed, an additional reference clock path is not needed, and the circuit area is reduced.

An integrated circuit device includes: one or more switches of a Buck converter; and a control circuit for the Buck converter including: a comparator configured to generate a comparator output signal by comparing a feedback voltage of the Buck converter with a compensation ramp voltage; a pulse generator configured to generate, in response to a rising edge in the comparator output signal, a pulse signal for controlling the Buck converter; a transconductance amplifier configured to generate, at an output terminal of the transconductance amplifier, a current proportional to a difference between a reference voltage and the feedback voltage; a capacitor coupled between the output terminal of the transconductance amplifier and a reference voltage node; and a ramp signal generator configured to generate the compensation ramp voltage by adding a voltage at the output terminal of the transconductance amplifier and a ramp voltage generated by the ramp signal generator.

The invention discloses a device and system for conducting electric field treatment on the digestive tract, the device for conducting electric field treatment on the digestive tract comprises a slender catheter, a supporting body located at the far end of the catheter, an electrode array film and a pulse generator, the electrode array film and the pulse generator are arranged on the supporting body, and the output end of the pulse generator is coupled with an electrode pair on the electrode array film. A sequence pulse wave output by the pulse generator comprises a plurality of groups of nanosecond pulse strings, and the time interval between the adjacent nanosecond pulse strings is 1us-10000 us; the nanosecond pulse string is composed of a plurality of nanosecond pulse pairs, and the time interval between every two adjacent nanosecond pulse pairs ranges from 50 ns to 10000 ns; the nanosecond pulse pair comprises positive pulses and negative pulses which appear alternately, the pulse width of the positive pulses and the pulse width of the negative pulses are 10-1000 ns, and the time interval is 10-1000 ns. The cell membrane permeability and the cell death efficiency can be remarkably improved, and the limitation of the traditional IRE technology is broken through.

The invention provides a plant chlorophyll index determination method based on multispectral laser, which comprises the following steps: detecting ambient light intensity of an environment where plant leaves are located to obtain an actual ambient light detection value; according to the actual detection value of the ambient light, a pulse generator is regulated and controlled, and a PWM frequency conversion signal is generated; driving a multi-band laser source based on the PWM frequency conversion signal to enable the laser source to emit laser and form uniform light spots on the surface of the plant leaf; receiving and preprocessing the laser signal reflected by the plant leaf to obtain a pure electric signal; the pure electric signal is converted into a digital quantity, calculation processing is carried out based on the digital quantity and a preset digital quantity, and the reflectivity corresponding to each wave band is obtained; and calculating based on the reflectivity corresponding to each wave band to obtain the chlorophyll index. By adopting the method, related data of the chlorophyll content of the plant can be accurately obtained, and technical support is provided for agricultural scientific management, diagnosis decision and high yield.

The invention relates to the technical field of partial discharge detection and sensor verification, and particularly discloses an ultrahigh frequency sensor relative amplitude online verification method for transformer bushing defects. The method comprises the following steps: firstly, spraying conductive paint into a lower porcelain bushing of the transformer bushing to form a creeping discharge channel, and constructing a transformer bushing operation simulation device; then, a standard calibration pulse generator is utilized to inject a discharge signal equivalent to a 10pC electric charge quantity at the defect position of the sleeve; then, the ultrahigh frequency sensor to be tested receives a partial discharge signal, and a relative amplitude model is established based on sensor frequency response, dielectric constant, signal propagation attenuation and installation conditions; and finally, comparing the actually measured signal amplitude with the calculated relative amplitude threshold, and if the amplitude is lower than the threshold, judging that the performance of the sensor is degraded. According to the method, the installation condition correction model is introduced, online evaluation of the sensitivity of the ultrahigh-frequency sensor under the condition that equipment is not disassembled is achieved, the real performance of the sensor in a complex field environment can be accurately reflected, and the reliability and maintenance efficiency of a transformer bushing partial discharge monitoring system are remarkably improved.

The invention discloses a method and a device for calibrating an ultrasonic time rod. The device comprises a pulse generating / receiving device, a first ultrasonic transducer, a second ultrasonic transducer and a display module, the pulse generating / receiving device works in a one-transmitting and one-receiving mode, the pulse generating / receiving device is used for generating high-voltage pulses, the transmitting / receiving end of the pulse generating / receiving device is connected with the first ultrasonic transducer, and the second ultrasonic transducer is connected with the display module. The first ultrasonic transducer is used for exciting ultrasonic signals, the receiving end of the pulse generator / receiver is connected with the second ultrasonic transducer, the second ultrasonic transducer is used for receiving ultrasonic signals, and the radio frequency output end of the pulse generator / receiver is connected with the input end of the display module. And when the pulse generator / receiver works in a self-transmitting and self-receiving mode, the transmitting / receiving end of the pulse generator / receiver is connected with the third ultrasonic transducer. According to the device, the sound time value of the ultrasonic sound time rod can be measured, and the ultrasonic sound time rod is calibrated based on the error.

A pulse-width modulator (401) comprising a pulse generator (402) configured to generate, at a switching frequency, a pulse-width modulated waveform for synthesising an analog waveform, and a clock unit (403) configured to control the switching frequency and to, while the pulse generator (402) is generating a series of pulses that represents a single respective period of the analogue waveform, change the switching frequency such that at least one pulse in every series is generated at a different switching frequency from other pulses in that series.

The invention provides a bulk metal ore grade online analysis method based on high-voltage pulse discharge breakdown spectroscopy, which comprises the following steps: (a) placing bulk metal ore particles in a high-voltage discharge electrode system filled with a liquid insulating medium, and applying 30-250kV voltage through a high-voltage electric pulse generator to carry out pulse discharge, carrying out electric breakdown on the ore particles and generating plasmas; (b) synchronously acquiring a plasma characteristic spectrum signal and a voltage waveform signal and a current waveform signal of pulse discharge in the electric breakdown process; (c) preprocessing the characteristic spectral signal, determining element types according to the wavelength of a characteristic spectral line, and extracting the intensity of the characteristic spectral line; and (d) inputting the characteristic spectral line intensity, the pulse discharge waveform parameter, the discharge condition and the ore particle property into a pre-established quantitative analysis model, and outputting the metal element grade of the ore particles.

The invention provides an integrated pulse generator. The integrated pulse generator comprises a coiling part, a pulse generating circuit and an electrode wire, the coiling piece is provided with an inner cavity and a communicating hole; the communicating hole communicates the inner cavity with the exterior of the coiling piece; the pulse generating circuit is accommodated in the inner cavity and is fixedly connected with one end of the electrode lead, and the other end of the electrode lead penetrates out of the inner cavity through the communicating hole, is coiled on the coiling piece and then extends towards the implantation part; and the coiling piece is rotatably arranged by taking the axis of the coiling piece as a rotating shaft so as to adjust the length of the electrode wire coiled on the coiling piece, so that the extension length of the electrode wire extending towards the implantation part is adjusted. Through the configuration, a connector between the electrode wire and the pulse generator is omitted, and the step of physically plugging the traditional electrode wire and the pulse generator is also omitted, so that the size of the pulse generator is reduced; and various poor connection problems caused by plugging faults of a connector between a traditional pulse generator and an electrode lead are completely eliminated.

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 layered pulse generator for a vertical-cavity surface-emitting laser (“VCSEL”) driver is disclosed consisting of three elements: a low-speed pulse generator, a high-speed pulse generator, and a pulse generator selector, all of which are on-chip with the VCSEL driver. By providing these elements on-chip, overall system power and complexity are reduced while allowing for significantly higher pulse train frequencies compared with known systems. The high-speed pulse generator is capable of generating pulses faster and with higher resolution than that of the low-speed pulse generator. The high-speed pulse generator uses multiple clock outputs, phase shifted, and synthesized into a single pulse waveform capable of wide-ranging frequencies, duty cycles and pulse counts.

The integrated circuit includes a delay monitor that monitors a delay of the data signal from the digital circuitry by generating a pulse having a width determined by the delay. In some embodiments, a delay monitor is implemented as a digital circuit that includes a pulse generator and an event generator. The delay monitor receives a data signal and a clock signal for clocking the data signal. The pulse generator generates a pulse according to the received data signal and the clock signal, wherein a width of the pulse is determined by a delay of the data signal relative to the clock signal. The event generator generates events that are temporally distributed with respect to the clock signal. As a result, the delay may be estimated based on an overlap between the event and the pulse.

Systems and methods of wirelessly powered stimulators and implantable pulse generators that can generate stimulations with programmable amplitudes and RF spectrum control in the RF domain are described. An embodiment includes an implantable pulse generator that includes: an Rx antenna configured to receive a radio frequency (RF) signal: a demodulator coupled to the Rx antenna, the rectifier, and a source, and configured to control an output of a train of mini-pulses, based on the RF signal, each mini-pulse having a voltage amplitude and a pulse width (on-portion) smaller than a pulse width TO; and stimulation circuitry 250 coupled to receive the train of minipulses and deliver the train of mini-pulse to an electrode, where the train of mini-pulses to the electrode effectively corresponds to a stimulation pulse, having a pulse width TO and an amplitude that is a function of the pulse widths of the mini-pulses.

The purpose of the embodiments of this disclosure is to provide a control method and system for an adaptive electrical pulse generator. The method involves: collecting inflammation-related data from a user; extracting the user's biometric vector using a feature extraction module based on the inflammation-related data; determining the user's disease course classification using a disease course classification module based on the biometric vector; and then determining corresponding electrical pulse parameters using a parameter generation module based on the biometric vector and the disease course classification. According to the electrical pulse parameters, the adaptive electrical pulse generator applies a corresponding broadband electrical pulse stimulation scheme to the user at the electrical stimulation application site. This disclosure, through data fusion and closed-loop optimization, achieves precise personalization and dynamic adaptability in parameter generation, promoting the leap from static templates to intelligent dynamic modes in electrical pulse parameter configuration schemes.

A pulse generator includes charging circuitry configured to provide electrical power to the pulse generator. The pulse generator includes communication circuitry configured to conduct wireless telecommunications with external programming devices. The telecommunications contain programming instructions sent from the external programming devices. The pulse generator includes stimulation circuitry configured to generate electrical pulses based on the programming instructions. The electrical pulses include a first component that is paresthesia-inducing and a second component that is non-paresthesia-inducing.

Provided is a multi-pulse conductive implantable physiotherapy probe and a physiotherapy device. The implantable physiotherapy probe comprises a conductive housing, and one end of the conductive housing is provided with a conductive port connected to an electrode wire. Arranged in the conductive housing are: a first pulse wave generator, a pulse wave emitted by the first pulse wave generator being a terahertz wave; and / or a second pulse generator, a pulse wave emitted by the second pulse generator being an infrared wave and / or a near-infrared wave; and a light output hole, arranged on the other end of the conductive housing to output the light emitted by the second pulse generator.

The invention relates to high-voltage cable terminal teaching model equipment integrating infrared temperature measurement and ultraviolet measurement. The high-voltage cable terminal teaching model equipment comprises a high-voltage cable terminal model; the heater is arranged in the high-voltage cable terminal model and is used for simulating an abnormal heating fault; the temperature control device is used for temperature control; the high-voltage pulse generator is used for generating periodic high-voltage pulse signals, and a positive electrode and a negative electrode are connected with high-voltage wires respectively; the hollow wire outlet rod is arranged in the center of the high-voltage cable terminal model; a hollow channel is arranged in the hollow wire outlet rod and is used for arranging a high-voltage wire; and the discharge electrode is respectively connected with the high-voltage wires of the positive electrode and the negative electrode to form a discharge positive electrode and a discharge negative electrode, and the discharge positive electrode and the discharge negative electrode are both connected with the top end of the terminal model. Compared with the prior art, students can master an infrared temperature measurement technology and can also know and master an ultraviolet measurement technology, so that the monitoring capability of the students on the running state of the power cable is improved.

Pulse-generator-based reciprocal quantum logic (RQL) bias-level sensors are fabricated on an RQL integrated circuit (IC) to sample AC or DC bias values provided to operational RQL circuitry on the RQL IC. The bias-level sensors include pulse generators having strengthened or weakened bias taps (transformer couplings to RQL AC clock resonators or DC bias lines) as compared to bias taps of Josephson transmission lines in the operational RQL circuitry, or Josephson junctions (JJs) with larger or smaller critical currents as compared to JJs in the operational RQL circuitry. Pulse generators with weakened bias taps or larger JJs can have lower limits of their operational ranges placed near an optimal bias point at the centroid of the operating region of the operational RQL circuitry. The bias-level sensors can be staged by relative strength to indicate whether a provided bias value is an improvement when varied over a range.

Disclosed is a pulsed laser apparatus and method of generating a laser pulse. The apparatus includes an input coupler configured to receive pumping light from a pumping light source and a seed pulse from a seed pulse generator. The apparatus further includes a doped fiber-optic cable with an input port at a first end configured to receive the pumping light and the seed pulse. The doped fiber-optic cable amplifies the seed pulse to generate an output pulse. Along a first length of the doped fiber optic cable, the pulse spectrum broadens rapidly owing to nonlinearity. Beyond the first length in an extended portion, the output pulse shifts towards longer wavelengths and broadens in both spectral and temporal domains. The apparatus also includes an output port at a second end of the doped fiber-optic cable, wherein the output pulse exits the doped fiber-optic cable at the output port.

Implanted pulse generators with reduced power consumption via signal strength-duration characteristics, and associated systems and methods are disclosed. A representative method for treating a patient in accordance with the disclosed technology includes receiving an input corresponding to an available voltage for an implanted medical device and identifying a signal delivery parameter value of an electrical signal based on a correlation between values of the signal delivery parameter and signal delivery amplitudes. The signal delivery parameter can include at least one of pulse width or duty cycle. The method can further include delivering an electrical therapy signal to the patient at the identified signal delivery parameter value using a voltage within a margin of the available voltage.

Technologies for closed-loop calibration of pulses to control spin qubits are disclosed. In an illustrative embodiment, calibration circuitry generates a pulse from a pulse generator. The pulse passes through a variable filter controlled by a filter parameter. The pulse is provided to a qubit, and the qubit is measured. Depending on the measured state of the qubit, the filter parameter can be changed. In this manner, the control pulses can be quickly and continuously calibrated. The calibration approach above offers several advantages. It can be implemented by circuitry close to the physical qubit, reducing opportunities for noise, cross-talk, etc. The calibration approach is scalable, as the calibration can be done quickly and continuously on a given qubit, and the same calibration circuitry can be multiplexed to interface with several qubits. The calibration circuitry can be on an integrated circuit, which can be in a cryogenic stage of the quantum computer.