341results about "Pulse characteristics measurements" patented technology

The embodiment of the invention provides a dish-washing machine, a door control method, a program product, a storage medium and electronic device.The dish-washing machine comprises a main control board and a door assembly; the door assembly comprises a knocking signal sensor assembly, and the sensitivity of the knocking signal sensor assembly dynamically changes along with the opening and closing state of the door assembly. The main control board is used for detecting the current state of the door assembly and transmitting a coding value corresponding to the current state to the knocking signal sensor assembly; the knocking signal sensor assembly is used for adjusting the sensitivity of the knocking signal sensor assembly based on the coding value, so that the sensitivity of the knocking signal sensor assembly is matched with the current state of the door assembly; detecting a knocking signal in a preset operation area of the dish washing machine, and transmitting the detected knocking signal to the main control board; the main control board is further used for switching the current state of the door assembly according to the knocking signal. The technical problem that the door opening and closing operation force of the dishwasher is difficult to grasp is solved.

The present invention discloses a pulse width detection circuit. The edge conversion circuit in the present application can control the charging and discharging of a capacitor in a capacitor power regulation circuit based on the pulse width of a digital signal, and then the triangular wave generated in the capacitor is processed by a hysteresis comparator. Finally, the pulse width of the digital signal can be judged by the output waveform of the hysteresis comparator. Since the capacitor power regulation circuit and the hysteresis comparator in the present application are both analog circuits, and the edge conversion circuit can also be selected to be an analog circuit, due to the characteristics of the analog circuit itself, the pulse width detection circuit in the present application is less affected by process accuracy, temperature and power supply voltage, thereby improving the accuracy of pulse width detection.

The invention provides a single-particle transient pulse detection circuit in a nanometer integrated circuit, and relates to the technical field of single-particle transient effect detection, and the circuit comprises a chain-type to-be-detected circuit, a single-particle transient pulse capture circuit and a single-particle transient pulse number counting circuit. Wherein the single-particle transient pulse capture circuit and the chain type circuit to be detected are tightly coupled circuits, the single-particle transient pulse capture circuit comprises a plurality of D-type latches with reset, and when the width of a single-particle transient pulse is larger than the propagation delay time of the buffer, the single-particle transient pulse is captured and stored by the D-type latches; therefore, the width of the single-particle transient pulse is detected. The single-particle transient pulse number counting circuit comprises a plurality of D-type trigger groups with reset and a counter group; when the D-type trigger group detects a single-particle transient pulse signal entering the input end of the D-type trigger group, a counting signal is input to the counter group, and counting is completed by the counter group. According to the invention, specific quantitative detection of the single-particle transient effect can be realized.

The invention relates to the technical field of aviation, and discloses a multi-electric aircraft direct-current power supply high-voltage GCU dual-backup arbitration system which comprises a pulse loss detection module, an I / O state detection module, an arbitration control logic module and a redundancy switching circuit module. The pulse loss detection module is used for generating timing pulses by using a 555 timer and detecting whether pulse signals output by the 555 timer are continuous or not; the I / O state detection module is used for detecting the level state of an I / O port in real time and judging that the I / O port is in a low-level, high-level or high-resistance state; the arbitration control logic module is used for processing I / O port state data through a gate circuit and deciding to use the main microprocessor or the standby microprocessor. And the redundancy switching circuit module is used for automatically switching to the standby microprocessor according to the arbitration control logic when the main microprocessor breaks down. The method has the advantage of high reliability.

The invention relates to the technical field of pulse acquisition, in particular to a high-speed ADC (Analog to Digital Converter) and FPGA (Field Programmable Gate Array) coordinated extremely-narrow pulse signal acquisition system, which comprises a phase identification monitoring module, a phase lock reference updating module, a sampling permission control module, a prohibition feedback identification module and a synchronous trigger adjustment module. According to the method, a beat tolerance judgment mechanism is introduced, hyper-bound phase deviation trend statistics and frequency vector extraction are combined, beat correction is carried out by utilizing a directional hopping cumulant and a period adjustment amount, a sampling permission judgment and keeping window alignment mechanism is introduced in a multi-frame period, and a two-way judgment means of a sampling starting trigger value is adopted, so that the beat tolerance of the multi-frame period is judged. And meanwhile, centralized extraction and frequency directivity statistics are carried out on the hopping direction in the sampling prohibition time sequence, the synchronous mismatch trend is distinguished, and the initial beat position is adjusted, so that the time domain characteristics of the narrow pulse waveform are kept continuous, the edge response is prevented from deviation, the trigger structure is stable and reliable, and the overall sampling judgment is more accurate and efficient.

A ripple voltage detector circuit comprises a pulse generator, a direct current-to-direct current (DC-DC) converter coupled to the pulse generator, and a first control loop coupled to the pulse generator and the DC-DC converter. The first control loop is configured to measure an output voltage of the DC-DC converter, determine an output ripple voltage of the output voltage, determine a ripple coefficient based on the output ripple voltage, determine a reference peak inductor current based on the ripple coefficient, and determine a peak value of an inductor current during a switching cycle, and transition a switching state of the DC-DC converter based on the reference peak inductor current and the peak value of the inductor current.

An apparatus for diagnosing a battery according to an embodiment of the present disclosure includes a voltage measuring unit configured to measure a voltage of a battery during a discharge process of the battery; a pulse output unit configured to generate a discharge pulse at every predetermined cycle and output the generated discharge pulse to the battery; and a control unit configured to calculate a resistance value of the battery based on a voltage deviation of the battery due to the discharge pulse, determine a resistance pattern in a preset initial discharge region based on the calculated resistance value, and diagnose whether there is lithium precipitation in the battery according to the determined resistance pattern.

The invention discloses a motor phase current sampling method and device, a chip and a motor controller, and the method comprises the steps: obtaining the duty ratio of a multi-phase bridge arm in a pulse modulation period; determining a to-be-sampled bridge arm according to the duty ratio; sampling a motor phase voltage corresponding to the to-be-sampled bridge arm in a target sampling time period corresponding to the to-be-sampled bridge arm, and determining a corresponding motor neutral point voltage; wherein the target sampling time period is a time period from the start of a dead zone corresponding to the to-be-sampled bridge arm to the completion of follow current; and determining a motor phase current corresponding to the to-be-sampled bridge arm according to the motor phase voltage corresponding to the to-be-sampled bridge arm and the corresponding motor neutral point voltage. According to the method, the sampling function of the motor phase current can be realized without phase shift and sampling point calculation, the algorithm is simple, harmonic waves are not generated, and the phase current sampling cost is relatively low.

The invention relates to a method for evaluating the state of an electronic component (12, 14) of a circuit arrangement (10) using an evaluation device (16), comprising the steps of: - specifying a target eye diagram (48) for the electronic component (12, 14) using an electronic computing unit (36) of the evaluation device (16); - acquiring at least one current signal (24) of the electronic component (12, 14) using a detection unit (26) of the evaluation device (16); - generating a current actual eye diagram (28) of the electronic component (12, 14) as a function of the acquired, current signal (24) using the electronic computing unit (36); - comparing the target eye diagram (48) with the actual eye diagram (28) using the electronic computing unit (36); and - evaluating the state as a function of the comparison using the electronic computing unit (36).Furthermore, the invention relates to a computer program product, a computer-readable storage medium and an evaluation device (36).

The invention provides a method and a system for measuring pulse width. The method comprises the following steps of: inputting a pulse to be measured into a delay chain; if the pulse to be measured is a negative pulse, directly inputting the pulse to be measured into the delay chain; if the to-be-measured pulse is a positive pulse, inverting the to-be-measured pulse and inputting the to-be-measured pulse into the delay chain; a pulse to be measured is output in a delay chain through a plurality of taps in sequence in a delay manner, and an output signal of each tap of the delay chain is input to the corresponding two-stage D flip-flop; if the to-be-detected pulse output by a certain tap has a negative pulse signal, the corresponding two-stage D trigger outputs a high level; otherwise, outputting a low level; counting the number M of the two stages of D triggers outputting high level, and taking the sum of the reduced widths of negative pulses caused by the delay time of the first M taps on the delay chain propagation path as the width of the negative pulses; wherein M is a positive integer. The pulse compression technology is adopted, the dead time is short, and the resolution ratio is high.

The invention provides a PWM signal duty ratio obtaining method, electronic equipment and a computer storage medium. The obtaining method comprises the following steps: obtaining the edge number of a PWM signal in a to-be-measured period; determining a duty ratio calculation strategy of the PWM signal in the to-be-measured period based on the edge number; and calculating the duty ratio of the PWM signal in the to-be-measured period by using a duty ratio calculation strategy. According to the PWM signal duty ratio obtaining method provided by the invention, the non-centrosymmetric PWM signal duty ratio can be obtained.

The invention relates to an early-stage high-altitude electromagnetic pulse incidence and polarization parameter determination method and a coupling effect analysis method thereof, belongs to the technical field of strong electromagnetic pulses, and meets the requirements of early-stage high-altitude electromagnetic pulse coupling effect analysis. The incidence and polarization parameter determination method comprises the steps of determining parameters of a blasting point and an observation point, solving an incidence elevation angle and an incidence azimuth angle, solving an incidence direction and a unit electric field vector, and solving a polarization angle. According to the coupling effect analysis method, early-stage high-altitude electromagnetic pulse coupling effect analysis of the power electronic system is carried out by utilizing early-stage high-altitude electromagnetic pulse incidence and polarization parameters. The method is used for analyzing the early-stage high-altitude electromagnetic pulse coupling effect of the power electronic system.

The invention discloses a continuous high-precision pulse width measurement method and system based on a high-speed serdes, and relates to the technical field of electronic measurement, and the method comprises the steps: S1, transmitting a matching calibration signal; s2, a calibration signal is selected and copied; s3, setting an initial delay value; s4, receiving the data and performing template comparison to complete initial calibration; s5, setting phase offsets of a plurality of links; s6, carrying out delay adjustment on the link; s7, carrying out precise delay calibration on link data; s8, analyzing the measurement precision; s9, selecting and copying a tested signal; s10, carrying out parallel interleaving sampling to output sampling data; s11, calculating a pulse width value; s12, calculating a compensated pulse width value according to the compensation coefficient; through the method, the time resolution is less than or equal to 10ps, and the maximum throughput rate is greater than 300M event / s; channel expansion is supported, and the interleaving sampling rate is improved; and a time delay chip with higher resolution can be used as a time delay adjusting module, so that the performance is improved.

Aspects of the present disclosure include a method, a switch, and / or a computer readable medium for analyzing a window of samples at an expected position of a plurality of input edges of a plurality of input waveforms, detecting the plurality of input edges, measuring a displacement of each input edge, with respect to a previous position, of the plurality of input edges, generating a value of the displacement of each input edge, incrementing a corresponding counter value of a plurality of accumulator values in response to each value of the displacement of a corresponding accumulator of the plurality of accumulators, normalizing the plurality of accumulator values, generating the plurality of accumulator values, summing the plurality of accumulator values output by the plurality of accumulators to generate an accumulated jitter value, and sending jitter result information based on the accumulated jitter value.

A computer-implemented method (100) for determining a load parameter value of a load model of an electrical load comprising: Receiving from a data acquisition means the synchronous data couples: Active power and voltage amplitude, Reactive power and voltage amplitude, Active power and frequency, or Reactive power and frequency; Generating continuously a first data set and a second data set from the data couples collected, wherein the first data set represents: active or reactive power samples, and the second data set represents: voltage or frequency samples; Calculating continuously a respective variation of the first and the second data sets; Detecting a discontinuity by comparing (102) continuously the variation of the first data set with a discontinuity limit; Detecting a disturbance by comparing (101) continuously the variation of the second data set with a disturbance variation detection limit; and, calculating (103) the load parameter value by means of a numerical method.

The invention relates to clock frequency calibration, and discloses a clock measuring circuit and a calibration method and system, and the method comprises the steps: employing a clock frequency detection circuit to measure and calculate the clock frequency of an internal to-be-calibrated crystal oscillator; entering a calibration state, performing cyclic calibration, and adjusting a calibration register; when the frequency value is calibrated to be within a set error range, clock calibration is completed; and a calibration stability test is carried out, and the calibration process is optimized. According to the clock measurement circuit and the correction method and system provided by the invention, high-precision and automatic calibration of the clock frequency and excellent environmental adaptability can be realized. The clock frequency of the crystal oscillator can be monitored and calibrated in real time through the built-in clock frequency detection circuit under the condition that an external reference clock is not needed, and the real-time performance and the automation level of calibration are remarkably improved. And a cyclic calibration mechanism and a stability test are introduced in the calibration process, so that the stability and reliability of a calibration result in long-term operation are ensured.

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 discloses a power semiconductor device online junction temperature detection method and system based on delay time, and the method comprises the steps: carrying out the edge collection of the delay time, and then synthesizing a delay time narrow pulse signal; based on the delay time narrow pulse signal, integral output signals are output at different integral speeds within and outside the delay time; and comparing the integral output signals, and generating an output wide pulse signal of which the pulse width is a fixed multiple of the delay time narrow pulse signal for online junction temperature detection of a power semiconductor device. The junction temperature of the power semiconductor device can be detected in real time, a basis is provided for thermal management of the power semiconductor device, the reliability of the power semiconductor device is improved, and reliable operation of a power electronic device is guaranteed.

According to the light-pressure-electromagnetic pulse fusion sensor for arc detection in the transformer oil, in the sensor, a shell is arranged in the transformer oil, and an elastic membrane is fixed to the junction of the shell and the surface of the transformer oil so as to bear fluid pressure and deform; the metal strain gauge is wound into a spiral shape on the elastic diaphragm to serve as a high-frequency antenna for capturing an electromagnetic pulse signal, and the metal strain gauge is strained along with deformation of the elastic diaphragm to monitor a pressure wave signal; the bottom film is arranged between the metal strain gauge and the elastic film to play a role in insulation and transmit deformation of the elastic film to the metal strain gauge, and the optical lens is fixed to the center of the elastic film to receive optical signals from transformer oil and serve as a balancing weight. The collimating mirror is fixed in the shell and is connected with the optical fiber to receive the optical signal; and the signal processing circuit is connected with the optical fiber to collect the optical signal and is connected with the metal strain gauge to collect an electromagnetic pulse signal and a pressure wave signal.

A duty ratio measuring device comprises an input switching unit, a period monitoring unit, a level monitoring unit, a period comparison unit, an output switching unit and a parameter output unit. The period monitoring unit is used for monitoring the period and the pulse width of a to-be-detected signal, and the period comparison unit is used for comparing a first period value output by the period monitoring unit with a first preset value and sending the period and the pulse width of the to-be-detected signal to the parameter output unit according to a comparison result; or the high-level voltage and the low-level voltage of the signal to be detected are monitored through the level monitoring unit, and the reference voltage value, the high-level voltage value and the low-level voltage value are sent to the parameter output unit; and the parameter output unit is used for acquiring the duty ratio of the to-be-measured signal according to the period and pulse width of the to-be-measured signal or according to the reference voltage value, the high-level voltage value and the low-level voltage value. Due to the fact that the duty ratio obtaining mode is adaptively selected according to the period value of the to-be-measured signal, the duty ratio obtaining precision is higher, and the duty ratio obtaining is more reliable.

Disclosed is a frequency detector. The frequency detector includes a first flip-flop sampling a clock signal based on a data signal to generate a first signal, a second flip-flop sampling a delayed-phase component of the clock signal based on the data signal or sampling the clock signal based on a delayed-phase component of the data signal to generate a second signal, a third flip-flop generating a third signal representing a polarity of a frequency difference between a data rate of the data signal and a frequency of the clock signal based on the first signal and the second signal, and a delay cell generating the delayed-phase component of the clock signal or the delayed-phase component of the data signal. The delayed-phase component has a delay amount set to a value smaller than about 0.25 UI.

The utility model discloses a pulse microwave biological effect experiment radiation field on-line measurement system which is characterized in that a transmitting waveguide horn antenna is electrically connected with a first waveguide coupler, and a coupling port of the first waveguide coupler is connected with a low-loss cable and then is connected to a first sampling channel of a digital oscilloscope through a first microwave broadband attenuator and a first microwave detector; the first waveguide coupler is connected with a high-power microwave source through a transmission waveguide; the receiving waveguide probe antenna is electrically connected with a second waveguide coupler and is arranged opposite to the transmitting waveguide horn antenna, and a coupling port of the second waveguide coupler is connected with a low-loss cable and then is connected to a second sampling channel of the digital oscilloscope through a second microwave broadband attenuator and a second microwave detector; the absorption load is arranged on one side of the receiving waveguide probe antenna; and the test bracket is made of a non-metal material and is used for supporting the receiving waveguide probe antenna and the absorption load. According to the utility model, accurate monitoring and measurement of ultrahigh-power and ultra-short pulse microwave peak power density can be realized.

The invention discloses an automatic test method for a digital chip PWM module, and the method comprises the steps: enabling a plurality of PWM capture channels to be connected with a plurality of PWM output channels, and enabling the fault input channels of the PWM output channels to be connected with a general purpose input / output (GPIO); creating an output signal data frame, wherein the data frame records a channel number, a channel state, a period value, a pulse width value, an output channel frequency division value, an effective level and a fault level; a PWM channel is started for capturing, and the pulse width and the period of an output channel are captured; the method comprises the steps of setting a period value, a pulse width value and an output frequency division value of a PWM output channel, outputting a PWM signal with a set duty ratio, initializing a data frame, and recording a channel number, the period value, the pulse width value, the frequency division value, an effective level and a fault level of the current PWM output channel; when the PWM capture channel detects that the state of the PWM output channel is RUN, whether the capture pulse width and period are consistent with the output pulse width and period of the output channel is compared, and when the capture pulse width and period are consistent with the output pulse width and period of the output channel and the number of normal capture times reaches a set threshold value, the PWM output period and duty ratio test is completed.

A computer-implemented method (100) for determining at least one load parameter value of at least one load parameter defined by a load model of at least one electrical load comprising: Receiving from a data acquisition means at least one of the following synchronous data couples: Active power and voltage amplitude, Reactive power and voltage amplitude, Active power and frequency, or Reactive power and frequency; Generating continuously a first data set and a second data set from the data couples collected over a time window, wherein the first and second data sets comprise at least two samples, and the first data set represents: Active power samples, or Reactive power samples; Calculating continuously a respective variation of the first and the second data sets; Comparing (102) continuously the variation of the first data set with a discontinuity limit, wherein a discontinuity is given when the variation of the first data set exceeds the discontinuity limit; Comparing (101) continuously the variation of the second data set with a disturbance variation detection limit, wherein a disturbance is given when the variation of the second data set exceeds the disturbance variation detection limit, and wherein the disturbance ends when the variation of the second data set falls below the disturbance variation detection limit; Calculating (103) the at least one load parameter value of the load parameter by means of a numerical method.

Embodiments of the present disclosure provide a pulse signal monitoring circuit, a chip, and an electronic device. The circuit comprises a pulse monitoring module. The pulse monitoring module comprises: a pulse period monitoring module used for monitoring, on the basis of a reference clock signal, the period of a pulse signal to be tested and the period change between two adjacent periods; and a pulse duty ratio monitoring module used for monitoring, on the basis of the reference clock signal, the duty ratio of said pulse signal and the duty ratio change between two adjacent periods.

Methods for electroporating plants and electroporation systems are described. The electroporation may be based on one or more of plant species, plant size, plant density, plant health and plant growth. The electroporation may target the basal portion of the plants. The plant characteristics may be sensed by driving electrodes used for electroporation in a sensing phase, preceding the electroporation treatment stage.

The invention relates to a sensor(S), in particular for an electrical network of an electrically driven vehicle, in particular in an electric car. The sensor according to the invention comprises first of all a measuring device (ME) for current measurement and / or for voltage measurement in the electrical network, in particular with a low-resistance current sense resistor for current measurement according to the four-wire technique. Furthermore, the sensor(S) according to the invention comprises an integrated insulation monitoring device (ME, IQ, Rk, S3) for monitoring an electrical insulation of high-side and / or low-side of the electrical network. The sensor(S) according to the invention is characterized by the fact that the insulation monitoring device (ME, IQ, Rk, S3) operates actively and impresses measurement pulses into the electrical network for insulation monitoring.

The application discloses a kind of generator stator winding partial discharge quantity's inversion method and system, belong to large-scale rotating electrical machine insulation state diagnostic technical field, method includes: obtaining or estimating the key distributed capacitance parameter in insulation structure multi-capacitance equivalent circuit model, mapping relationship database is established;Partial discharge detection is carried out to the generator stator winding of applied test voltage, and the characteristic information of discharge pulse is collected;Based on the key distributed capacitance parameter in mapping relationship database, pre-generated pulse waveform-defect capacitance calibration curve, the characteristic information of discharge pulse collected is executed nonlinear iterative inversion calculation;Quantitative evaluation, type identification and health diagnosis are carried out to the insulation defect of generator stator winding.The application introduces pulse waveform feature into partial discharge physical quantity inversion, improves the accuracy, quantitative level and defect identification ability of generator stator insulation state evaluation, provides technical support for generator life extension and condition maintenance.

The invention provides a pulse detection method, communication equipment, a storage medium and a program product. The method comprises the following steps: acquiring a communication signal according to a clock reference signal of a receiver; after the first pulse detection result of the communication signal is passed, acquiring a control state of pulse frequency drift check of the communication signal; and according to the control state and the clock reference signal, pulse frequency drift detection is controlled to be enabled until pulse detection of the communication signal is completed. According to the invention, after the first pulse detection result of the communication signal is passing and the control state of obtaining the pulse frequency drift detection of the communication signal is forbidden, the pulse frequency drift detection is controlled to be enabled based on the clock reference signal and the correctness verification result, so that the control accuracy of pulse detection is improved, and the accuracy of pulse detection is improved. And the problem that a large amount of invalid software / hardware redundancy and resource waste exist under the working conditions that the configuration clock reference of the receiver is inconsistent, the number of configured half bytes of the receiver is inconsistent with the number of configured half bytes of the transmitter or the communication is unstable at the beginning is avoided.

The present application discloses a method and a device for acquiring radio frequency power signals, wherein the method comprises: determining a rising edge interval and a falling edge interval within a current pulse cycle; setting the data bits in a sampling array corresponding to the rising edge interval and the falling edge interval to 0, low signal level or blank signal, thereby solving the prior art problem of the signals continuing to be continuously acquired and output during the ramp generation phase, which leads to inaccurate output data because the acquisition board continuously acquires voltage and current signals and continuously outputs signals, even in on / off mode and PULSE mode.