76 results about "Pulse pattern" patented technology

The invention relates to a human body health state assessment system and assessment method based on multi-point acquisition, and the system comprises an event sensing module which is used for collecting an image data signal, a physiological signal and an environment data signal of a human body, and outputting an asynchronous pulse event flow when the signal change is detected; the pulse coding module is used for generating a space-time pulse sequence through a preset adaptive threshold coding technology; the neural network processing module is used for performing event driving processing by utilizing leakage integral distribution neurons in a preset pulse neural network according to the space-time pulse sequence to obtain a current health characteristic pulse mode; and the health state decoding module is used for obtaining a health state score and a risk classification result of the current human body through a preset pulse distribution rate analysis algorithm and a preset time sequence decoding technology according to the current health characteristic pulse mode. Therefore, the problems of high power consumption, high delay, low data transmission efficiency, low early pathological feature recognition accuracy and the like of a human health state evaluation system are solved.

A multilevel power converter includes a plurality of switches, a first DC link capacitor, a second DC link capacitor, and one or more processors configured to: generate, for a duty cycle of the multilevel power converter, a pulse width modulated pulse pattern in accordance with a reduced common mode voltage scheme; modify the pulse width modulated pulse pattern to render a modified pulse pattern; and cause the plurality of switches to implement the duty cycle based at least in part on the modified pulse pattern to render a common mode voltage pulse to balance voltages at the first DC link capacitor and the second DC link capacitor.

A multilevel power converter includes a plurality of switches, a first DC link capacitor, a second DC link capacitor, and one or more processors configured to: generate, for a duty cycle of the multilevel power converter, a pulse width modulated pulse pattern in accordance with a reduced common mode voltage scheme; modify the pulse width modulated pulse pattern to render a modified pulse pattern; and cause the plurality of switches to implement the duty cycle based at least in part on the modified pulse pattern to render a common mode voltage pulse to balance voltages at the first DC link capacitor and the second DC link capacitor.

The invention provides an operation state data processing method and system applied to an electronic circuit board, and the method comprises the steps: obtaining the real-time voltage fluctuation data of each power path of the electronic circuit board in a preset monitoring time, and carrying out the self-adaptive time-frequency decomposition of the real-time voltage fluctuation data; separating to obtain a steady-state substrate component representing stable operation characteristics of the circuit board and an instantaneous pulsation component reflecting an instantaneous interference phenomenon, and constructing an amplitude-time sequence correlation heat map in a two-dimensional data plane based on an amplitude change sequence of the steady-state substrate component and a time interval parameter corresponding to a sampling timestamp; performing pixel-by-pixel morphological fusion on the pulse pattern and a standard pulse pattern stored when the circuit board leaves a factory to generate a fusion difference spectrum containing space distribution characteristics of difference pixels, and calculating a state coupling coefficient of each power supply path according to the space density distribution characteristics of the difference pixels; and integrating the state coupling coefficients of all the power paths to obtain a quantitative condensation index. According to the invention, the reliability and comprehensiveness of operation state evaluation can be improved.

The invention discloses an intelligent traditional Chinese medicine pulse diagnosis system which comprises a pulse condition information acquisition module (1), a processing module (2), a diagnosis module (3) and a visualization module (4). According to the method, the adaptive Fourier algorithm AFD and wavelet transformation are combined, complex pulse signals can be decomposed more accurately, key physiological features are extracted, the pulse diagnosis signal processing precision and reliability are improved, the key features in the pulse signals can be accurately extracted by means of the adaptive Fourier decomposition algorithm, and the pulse diagnosis signal processing accuracy and reliability are improved. High accuracy and consistency of pulse condition type classification are ensured, multiple common traditional Chinese medicine pulse condition types can be accurately identified through the deep learning model, diversified and complex pulse condition types are coped, an objective and accurate basis is provided for traditional Chinese medicine diagnosis, subjectivity and uncertainty of traditional Chinese medicine diagnosis can be reduced, and diagnosis accuracy is improved. The accuracy and reliability of diagnosis are improved, and the accuracy of pulse diagnosis is improved.

The invention relates to the technical field of equipment control, and discloses a control method of a wave conduction health care instrument capable of outputting different waveforms based on symptoms, and the method comprises the steps: transmitting a 1-10MHz multi-frequency detection wave to a target treatment area, calculating tissue impedance distribution through a reflected wave, and obtaining a focus boundary coordinate based on an impedance difference threshold; on the basis of the impedance-frequency response curve, an inverse phase compensation waveform is generated through a time reversal algorithm, the inverse phase compensation waveform comprises a phase delay component in negative correlation with the impedance curve, and tissue scattering distortion is counteracted; synchronously starting the electrical stimulation module and the ultrasonic module; the focus coordinates are repeatedly updated every 30 seconds, and the electrical stimulation focusing position is adjusted; the concentration of lactic acid and the concentration of prostaglandin E2 in tissue fluid are detected in real time through a microfluidic sensor, and correction is triggered when any concentration exceeds the limit, specifically, lactic acid ultralimit switching electrical stimulation is 50-100 Hz damped oscillatory waves (larger than or equal to 5 minutes), prostaglandin E2 ultralimit switching ultrasound is in a pulse mode, and the electrical stimulation amplitude is increased. The treatment effect of the waveform treatment equipment can be improved.

The present invention relates to the field of (digitally controlled) electric motors, (digital) control systems, (electric) motor-based systems, including those (digital) control systems, and methods relating thereto. The present invention addresses the complexity of dynamic switching between two or more different modulation algorithms, such as SVPWM (Space Vector Pulse Width Modulation), SPWM (Sinusoidal Pulse Width Modulation), THIPWM (Third Harmonic Pulse Width Modulation), DPWM (Discontinuous Pulse Width Modulation), OPP (Optimized Pulse Pattern).

Methods, systems, and computer-implementable algorithms for determining time-varying pulses for a patient with an implantable stimulator device (ISD) are disclosed. At least one time-invariant tonic stimulation pulse parameter (e.g., amplitude, pulse width, or frequency) is modified by a modulation function to produce a time-varying pulse (TVP), and one or more measurements are made to determine the effectiveness of the TVP. The measurements can be objective and taken from the patient, and / or subjective and determined based on feedback from the patient. In one example, the objective measurements can include one or more features determined from an epidural spinal cord electrogram (ESG) signal detected by the ISD, which can include an evoked compound action potential. The one or more measurements are used to determine a score for the TVP, which is useful in selecting the best TVP for use with the patient, or for adjusting the modulation function applied to the tonic stimulation parameters.

An electroporation system is provided. The electroporation system includes a catheter comprising a plurality of electrodes; and a pulse generator coupled to the catheter, the pulse generator being configured to generate a waveform delivered using at least one of the plurality of electrodes. The waveform includes a first pulse pattern and a second pulse pattern consecutive to the first pulse pattern, wherein the pulse period defined between the start point of the first pulse pattern and the start point of the second pulse pattern is in the range of 1 millisecond (ms) to 100 ms, such that the waveform contributes to increasing the depth of lesion.

The invention provides a traditional Chinese medicine pulse diagnosis instrument based on artificial intelligence and a data analysis method thereof. The pressure detection mechanism comprises an air bag wrapping the to-be-detected part, an inflation part used for inflating the air bag to enable the air bag to pressurize the to-be-detected part of the user, a gas pressure sensor linked with the air bag and a flexible pressure sensor, and the pressure detection mechanism is used for applying different pressures to the to-be-detected part and collecting pulse information under the different pressures; the data acquisition module is used for converting the analog signal into a digital signal and preprocessing the digital signal; the signal processing module is used for carrying out segmentation, calibration, normalization and SG smoothing on the pulse waveform and extracting features; and the pulse condition analysis module is used for carrying out pulse condition recognition and classification on the quantization parameters by utilizing a machine learning algorithm. According to the method, pulse information under different pressures is collected and processed, and stable, accurate and lossless collection and quantitative analysis of pulse condition information are achieved through one-to-one mapping of characteristic values and traditional Chinese medicine conclusions.

Evaluation and adjustment of time-varying pulse patterns in spinal cord stimulator systems are disclosed. Methods, systems, and computer-implemented algorithms are disclosed for determining time-varying pulses for a patient having an implantable stimulator device (ISD). At least one time-invariant stimuli pulse parameter (e.g., amplitude, pulse width, or frequency) is modified by a modulation function to produce a time-varying pulse (TVP), and one or more measurements are made to determine the effectiveness of the TVP. The measurements may be objective and taken from the patient, and / or subjective and determined based on feedback from the patient. In one example, the objective measurements may include one or more features determined from electrospinal cord (ESG) signals detected by the ISD, which may include evoked composite action potentials. One or more measurements are used to determine a score of TVP, which is useful in selecting an optimal TVP for use with a patient, or in adjusting a modulation function applied to an ankylosing stimulation parameter.

Described herein is method for controlling an electrical converter, the electrical converter converting an input voltage (vin) into a multi-level output voltage (vout), the method incudes: determining an optimized pule pattern (u(x)); and determining switching states from the optimized pulse pattern (u(x)) and applying the switching states to semiconductor switches of the electrical converter, such that the multi-level output voltage (vout) is generated, where the optimized pulse pattern (u(x)) includes a plurality of switching transitions (Δu), each switching transition (Δui) encoding a transition between two different levels of the multi-level output voltage (vout), at a switching angle (xi), where the optimized pulse pattern (u(x)) is determined by optimizing a cost function, where the cost function J(x)=ΔuTA(x)Δu is a cost matrix A(x), and where each entry of the cost matrix A(x) depends on polynomials into which the switching angles (xi) are input.

The invention relates to a simulation method for generating pulse patterns defined by switching angles for a synchronous PWM modulation method for controlling an inverter that supplies an electric motor, wherein The simulation procedure comprises the following steps: a. Providing an inverter model that reflects inverter losses when using the synchronous PWM modulation method to operate the electric motor; b. Providing a motor model of the electric motor that reflects motor losses of the electric motor when implementing the synchronous PWM modulation method to operate the electric motor; c. Determine at least one switching angle of the synchronous PWM modulation method to define a start pulse pattern and determine the inverter losses and motor losses taking into account the start pulse pattern based on the inverter model and the motor model; d. Searching for suitable switching angles for operating the electric motor by changing at least one switching angle to obtain varied pulse patterns and evaluating the inverter and motor losses determined for each of the varied pulse patterns; and e. Saving the switching angles found by searching for controlling the inverter corresponding to the inverter model in order to operate the electric motor corresponding to the motor model.

The invention relates to a method for regulating and / or controlling an electric machine by extended synchronous modulation based on space vector modulation, wherein the following input variables are used: - a set (Σ) of switching durations (Σ1, ..., Σx) that appear within a subsequent sampling interval, - a current angular error (ΣError,Now) and a subsequent angular error (ΣError,Next), - a minimum switching angle (Σmin), wherein an online calculation of switching angles (Σ1) and a flow trajectory (Σab) is performed, wherein pulse patterns (suvw(Σel)) are calculated online as a function of a modulation level (m).

Systems, methods, and computer program products are provided for calibrating ultrasonic flow sensors. An example system includes an ultrasonic flow sensor that includes a flow tube, a first piezoelectric sensor or transducer, and a second piezoelectric sensor or transducer; and at least one processor configured to: (vi) modify, based on (i) whether a signal-to-noise ratio (SNR) associated with at least one ultrasonic signal satisfies at least one threshold SNR ratio and (ii) whether the at least one ultrasonic signal includes saturation, a number of excitation pulses included in an excitation pulse pattern.

The invention discloses a control method of a nasal irrigator and the nasal irrigator, and relates to the technical field of nasal irrigators. The control method comprises the step of controlling to enter a pulse mode in response to a pulse starting instruction. In a pulse mode, at least M PWM signals with different duty ratios are circularly and alternately output so as to drive the water outlet assembly to generate changing (M-1) groups of pulse water flows; wherein M is a positive integer greater than 1. Thus, diversified pulse water flow can be provided, natural physiological stimulation can be more effectively simulated or flushing can be conducted on nasal cavity areas with different blocking degrees, and stubborn secretions and particulate matter can be more thoroughly loosened and removed through the variable water flow intensity; cleaning dead angles or insufficient flushing possibly caused by single-intensity water flow is avoided, and the problem that an existing nasal irrigator is poor in cleaning effect is solved.

A pulse diagnosis device and pulse pattern recognition method are disclosed. The pulse diagnosis device includes: a wearable body for wearing on the wrist to be tested; the wearable body is provided with a pressure sensing mechanism and an ultrasound detection mechanism; wherein the ultrasound detection mechanism is used to locate at least three target pulse points on the wrist to be tested; the pressure sensing mechanism is used to apply gradient pressure to the at least three target pulse points on the wrist to be tested and to collect the pulse pressure signals of the at least three target pulse points under the action of the gradient pressure; the ultrasound detection mechanism is also used to collect vascular feature information corresponding to each of the at least three target pulse points. The technical solution of this application can effectively improve the accuracy of the pulse diagnosis device.

An electroporation system is provided. The electroporation system includes a catheter comprising a plurality of electrodes, and a pulse generator coupled to the catheter, the pulse generator configured to generate a waveform to be delivered using at least one of the plurality of electrodes. The waveform includes a first pulse pattern, and a second pulse pattern that is consecutive to the first pulse pattern, wherein a pulse period defined between a start of the first pulse pattern and a start of the second pulse pattern is in a range from 1 millisecond (ms) to 100ms, such that the waveform facilitates increasing lesion depth.

An electrical converter (10) comprises a main stage (12) adapted to convert a DC voltage into an intermediate voltage comprising at least two voltage levels, and a filter cell stage (14) having filter cells (30) for each phase of the intermediate voltage, each filter cell (30) being adapted to add or subtract a cell voltage of the filter cell (30) to the intermediate voltage. A method for controlling an electrical converter (10) comprises a pattern determination section (44) comprising the steps of: determining a main pulse pattern (60) for a main stage (12) with pulse width modulation, where the main pulse pattern (60) is determined from a voltage reference signal (Vref, abc) for an output voltage, and wherein the main pulse pattern (60) comprises a switching time for the main stage (12) within a next modulation period of the main stage (12); and determining a cell pulse pattern (70) for the filter cell stage (14) with pulse width modulation, where the cell pulse pattern (70) is determined from the difference between the voltage reference signal (Vref, abc) and the primary stage voltage signal (62) determined from the primary pulse pattern (60), and where the cell pulse pattern (70) comprises a switching time for the filter cell (30) within the next modulation period. The method further includes a model predictive control section (46) including the following steps performed multiple times during the next modulation period: modifying the main pulse pattern (60) and the unit pulse pattern (70) by moving at least one transition time of the switching time, such that a flux error determined from a difference between an estimated flux of the electrical converter and a reference flux trajectory (76) is minimized; and applying at least a next switching time from the main pulse pattern (60) and the unit pulse pattern (70) to the electrical converter (10).

Method for regulating and / or controlling an electrical machine by extended synchronous modulation based on space vector modulation, using the following input variables: - a set (α) of switching times (α1, ..., α x ), which appear within a subsequent sampling interval, - a current angular error (α Error,Now ) and a subsequent angular error ( α Error,Next ), - a minimum switching angle (α min ), where an online calculation of switching angles (τ1) and a flow trajectory (ψ) ab ) is done, and where pulse pattern (s uvw (γ el )) depending on a modulation level (m) can be calculated online, characterized by the fact that with different signs of the angular error (α) Error,Now , α Error,Next ) α the smaller angular error in absolute value (α Error,Now , α Error,Next) determines the maximum switching time (Δα) Error,max ) can potentially be redistributed, where by summing all around the minimum switching angle (α min ) reduced switching times from the set (α) that corresponds to a current or subsequent space vector ( u → Now , u → N ext ) are associated with the switching time (Δα) Now,max , Δα Next,max ) is determined to predict the occurrence of the space vector ( u → Now , u → N ext ) can be reduced to a maximum within the sampling interval, - where in the case of a negative current angular error (α) Error,Now ) to shorten the current space vector ( u → Now ) the actual switching time to be redistributed (Δα) from the minimum of the maximum switching time (Δα) Error,max ) and α of the switching time (Δα Now,max) is determined, whereby the switching duration to be redistributed (Δα) is chronologically distributed to the corresponding switching durations (α) Now,i ) divided and then each individual switching duration (α) Now,i ) to determine the corresponding Δα i is reduced, whereby the extension of the switching state ( u → N ext ) to determine the switching duration to be redistributed (Δα) solely by considering the first associated switching duration (α) Next,1 ) is done, - where in the case of a positive angular error (α Error,Now ) to shorten the space vector ( u → N ext ) the actual switching time to be redistributed (Δα) from the minimum of the maximum switching time (Δα) Error,max ) and the switching time ( Δα Next,max ) is determined, whereby the switching duration to be redistributed (Δα) is chronologically distributed to the corresponding switching durations (α) Next,i ) divided and then each individual switching duration (α) Next,i ) around the corresponding (Δα i) is reduced, whereby the extension of the switching state ( u → Now ) to determine the switching duration to be redistributed (Δα) solely by considering the first one for the switching state ( u → Now ) apparent switching time (α) Now,1 ) is carried out, where the modified set (α) of switching durations is output.

An implantable nerve stimulation device is configured with a current delivery architecture having at least two digital-to-analog converters (DACs); and a therapy definition circuit using the therapy configuration is provided, which allows the two therapy configurations to be linked together. When two therapy configurations are linked, each therapy configuration uses a different one of the DACs to deliver therapy in an overlapping or simultaneous manner using the same or different electrodes.

Methods, system, and computer-implementable algorithms are disclosed for determining time-varying pulses for a patient having an implantable stimulator device (ISD). At least one time-invariant tonic stimulation pulse parameter (e.g., amplitude, pulse width, or frequency) is modified by a modulation function to produce time-varying pulses (TVPs), and one or more measurements are taken to determine the effectiveness of the TVP. The measurements may be objective and taken from the patient, and / or subjective and determined based on feedback from the patient. In one example, objective measurements may comprise one or more features determined from an electrospinogram (ESG) signal detected by the ISD, which may include evoked compound action potentials. The one or more measurements are used to determine a score for the TVP, which is useful in selecting a best TVP for use with the patient, or for adjusting the modulation function applied to the tonic stimulation parameters.

Methods and systems are provided herein for an adjustable current individualized stimulation system. In one example, a stimulation system comprises a device comprising a plurality of stimulation electrodes and at least one isolated current source (ICS), wherein the device is configurable to adjust current parameters and a pulse pattern of pulses of stimuli applied to a patient.

A voltage monitoring device 2 includes: a comparator circuit 31; a state determination circuit 32; a pulse pattern setting circuit 33; an output circuit 36; a VDD port 21; a VSS port 22; an input port 24; and an output port 23. The comparator circuit 31 is connected to the state determination circuit 32. The state determination circuit 32 is connected to the pulse pattern setting circuit 33. The pulse pattern setting circuit is connected to the output port 23 via the output circuit 36.

A semiconductor device for generating PWM modulation signals, for example an optimized pulse pattern (OPP), is provided. An ADC 42 outputs the motor angle and is connected to a coprocessor 52, for example a digital signal processor (DSP). The coprocessor 52 has an observer 44 connected to the angle inputs for generating a motor angle, and a lookup table 48 for generating a PWM signal as a direct function of the generated motor angle. A processing unit 46 has an input connected to the coprocessor 52, and the processing unit is configured to select a lookup table based on the generated motor angle and to store the selected lookup table as the lookup table 48.

An electroporation system is provided. The electroporation system includes a catheter comprising a plurality of electrodes, and a pulse generator coupled to the catheter, the pulse generator configured to generate a waveform to be delivered using at least one of the plurality of electrodes. The waveform includes a first pulse pattern, and a second pulse pattern that is consecutive to the first pulse pattern, wherein a pulse period defined between a start of the first pulse pattern and a start of the second pulse pattern is in a range from 1 millisecond (ms) to 100 ms, such that the waveform facilitates increasing lesion depth.

The invention discloses a porous medium multi-sequence splitting lap-joint net-forming grouting control method and system, and belongs to the technical field of grouting engineering.By conducting multi-sequence splitting lap-joint net-forming grouting with multiple sequences and the interval set time of the adjacent sequences, in the interval time between every two sequences, due to the viscosity time-varying characteristic of grout, the number of the multiple-sequence splitting lap-joint net-forming grouting is increased, and the number of the multiple-sequence splitting lap-joint net-forming grouting is increased. And the tip of the previous order split pulp vein tends to be initially set. The local stress distribution is changed due to the initial setting of the preorder slurry vein part, so that the subsequent cleavage channel is forced to occur at a new position and diffuse in a new direction, and after bypassing the influence range of cleavage-compaction-initial setting of the preorder cleavage slurry vein, the subsequent cleavage channel returns to develop in the direction of the maximum principal stress, and a dendritic cleavage slurry vein form is formed in a target grouting range; the mechanical reinforcement effect of splitting a pulp vein framework to form a net is achieved in an injected medium; and the defect that only trunk split pulp veins with limited quantity and single direction are formed due to continuous diffusion of the pulp along a dominant split channel in the direction of the maximum principal stress is avoided.

The application discloses a kind of pore medium multi-sequence split lap netting grouting control method and system, belong to grouting engineering technical field, by carrying out multi-sequence and adjacent sequence interval setting time multi-sequence split lap netting grouting, in the interval time between every two sequences, due to the time-varying characteristics of slurry viscosity, the tip of previous sequence split slurry pulse tends to initial setting.Due to the partial initial setting of previous sequence slurry pulse, the local stress distribution changes, forcing the post-sequence split channel to occur in a new location and spread in a new direction.After passing through the influence range of the previous sequence split slurry pulse "splitting- compaction-initial setting", it returns to develop along the direction of the maximum principal stress, forming a dendritic split slurry pulse pattern in the target grouting range, which plays a mechanical reinforcement effect of splitting slurry pulse skeleton netting in the grouted medium;Avoid the disadvantage of continuous splitting channel diffusion of slurry along the direction of the maximum principal stress, only forming a limited number of main trunk split slurry pulses with a single direction.

There are provided a waveform memory 10 that stores waveform data of an arbitrary waveform, a control unit 30 that outputs the waveform data stored in the waveform memory in time-series order at predetermined time intervals, and a waveform signal generation unit 20 that generates a waveform signal by performing digital-analog conversion on the waveform data output under the control of the control unit. A data processing unit40 that sequentially calculates, when generating a pulse pattern waveform, waveform data in time-series order based on pulse pattern data is further provided, and the control unit outputs the sequentially calculated waveform data at predetermined time intervals from the data processing unit to the waveform signal generation unit, and causes the waveform signal generation unit to generate a waveform signal by performing digital-analog conversion.