235results about "Pulse characteristics measurements" patented technology

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 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.

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.

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 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.

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 problem to be solved by the present invention is to provide a spot welding spatter detection method that can detect spatter generation without resetting the voltage detection line. To solve the above problem, in the spot welding method, a pulsed waveform welding current is provided to the workpiece by alternately performing the following steps in multiple cycles: a step of maintaining the welding current within a set peak current range; a step of decreasing the welding current from the peak current range towards the bottom current, and then increasing the welding current towards the peak current range when the effective value of the welding current reaches a set target range. In the spatter detection method, the pulse widths IW(1), IW(2), ... of the pulsed waveform in each cycle are measured. If the pulse width difference D(M) = IW(M) - IW(M-1) between the pulse width IW(M) in the target cycle (the Mth cycle) and the pulse width IW(M-1) in the previous cycle exceeds a width threshold Dth, then the generation of spatter is detected.

The invention discloses a PWM signal frequency detection method and device and a household appliance, and belongs to the technical field of household appliances. The PWM signal frequency detection method comprises the following steps: counting based on a counting period, and obtaining an initial period value based on counting values when a target edge of a PWM signal is continuously captured twice; the target edge comprises at least one of a rising edge and a falling edge; under the condition that the initial period value is in the first range, multiplying a counting frequency value corresponding to the counting period by a target multiple, dividing by the initial period value, and rounding down to obtain an initial rotating speed value; the target multiple is the multiple of the rotating speed of the target equipment relative to the working frequency of the target equipment; and obtaining the value of the actual frequency of the PWM signal based on the quotient obtained by dividing the initial rotating speed value by the target multiple. According to the PWM signal frequency detection method and device, and the household electrical appliance provided by the invention, a more accurate frequency value can be obtained, and the precision of frequency detection of the PWM signal can be improved.

The present invention provides a jitter tolerance measuring device and a jitter tolerance measuring method that can automatically calculate the measurement time required to obtain a desired reliability level and perform error measurements to obtain the jitter tolerance of an object under test over the calculated measurement time. [Solution] The jitter tolerance measuring device includes an error measurement unit 14 that measures the number of errors and error rate of the output signal of the DUT200, which receives a pattern signal synchronized with a jitter clock phase-modulated by a jitter modulation signal, over a predetermined measurement time; a jitter tolerance measuring unit 16 that changes the jitter amplitude and jitter frequency of the jitter modulation signal and estimates the maximum jitter amplitude at which the number of errors or error rate measured by the error measurement unit 14 is less than or equal to a predetermined tolerance value as the jitter tolerance of the DUT200 for each jitter frequency; a measurement time setting unit 20 that calculates the measurement time and sets it in the error measurement unit 14; and a display unit 32 that displays a setting screen 40 for setting the measurement conditions for jitter tolerance.

This invention provides a jitter tolerance measuring device and method that automatically calculates the reliability level of the output signal of the object under test when jitter tolerance is obtained, allowing for quick and easy confirmation of the reliability of jitter tolerance after a jitter tolerance test. [Solution] The jitter tolerance measuring device 1 includes an error measurement unit 14 that measures the error measurement value of the output signal of the DUT200, which receives a pattern signal synchronized with a jitter clock phase-modulated by a jitter modulation signal, over a predetermined measurement time; a jitter tolerance measuring unit 16 that changes the jitter amplitude and jitter frequency of the jitter modulation signal and estimates the maximum jitter amplitude at which the error measurement value measured by the error measurement unit 14 is less than or equal to a predetermined tolerance value as the jitter tolerance of the DUT200 for each jitter frequency; a reliability level calculation unit 20 that calculates the reliability level related to the tolerance value of the error rate of the output signal of the DUT200; and a display unit 32 that displays a result display screen showing the jitter tolerance and reliability level.

The invention discloses a single particle transient pulse width measurement circuit, belonging to the technical field of basic electronic circuits. The circuit comprises a front-stage detection part and a rear-stage logic control part, wherein the front-stage detection part comprises a double-chain detection circuit composed of two delay chains and a PD detector and a logic device for calculating the rear-stage logic control signal, and the rear-stage logic control part comprises a counter for classifying and counting the partial pulses of the SET pulse that exceed the measurement range. The invention has the advantages of low area cost, high detection accuracy and wide measurement range.

The utility model discloses a square wave frequency and duty ratio detection display device, comprising a circuit board on which a detection module and a display module are integrated. The detection module adopts a GD32A503VD microcontroller, and the display module adopts an OLED (Organic Light Emitting Diode) display screen; the OLED display screen is electrically connected with the GD32A503VD microcontroller in an I2C (Inter-Integrated Circuit) communication connection mode; a power supply interface is arranged on the circuit board in an integrated mode, and the power supply interface is electrically connected with the OLED display screen and the GD32A503VD microcontroller. According to the utility model, the GD32A503VD microcontroller is used as a core processing unit to realize miniaturization and low cost of equipment, and the built-in ADC module and timer module are used to realize high-precision measurement; a calculation result is transmitted to a 0.96-inch OLED display screen through an I2C interface to be displayed, so that visual operation is realized; the GD32A503VD microcontroller is triggered to start to collect PWM signals through simple key operation, and convenient operation is achieved.

The invention relates to the technical field of pulsed electric field detection equipment, and discloses a detector for pulsed electric field measurement, which comprises an induction unit, a signal transmission unit, a dynamic adjustment module and an environment adaptation module, and is characterized in that the dynamic adjustment module is configured to adjust the input impedance value of the induction unit in real time according to the change of an electromagnetic environment. The environment adaptation module is connected with the sensing unit, the signal transmission unit and the dynamic adjustment module. The environment adaptation module is configured to optimize a signal transmission path according to test scene requirements. According to the invention, by dynamically adjusting the input impedance of the induction unit and optimizing the signal transmission path, the precision and stability of pulse electric field measurement can be improved, and changes of different electromagnetic environments and test scenes can be adapted.

The invention discloses a disconnection detection implementation method applied to a load management branch device, and the technical scheme comprises the steps: enabling equipment to be capable of distinguishing a disconnection detection instruction and a remote control tripping instruction through the difference of the widths of pulse signals received by a remote signaling port by expanding a DL / T645-2007 protocol; therefore, on the basis that the on-site stock station area does not have the condition of control loop disconnection detection hardware, the disconnection detection function is achieved in the mode that software is matched with existing hardware, and meanwhile the disconnection detection function is achieved by expanding disconnection detection instructions and remote control tripping instruction enabling commands. It is stipulated that the load management branch apparatus must only respond to the relevant signal within the enable command valid time period. According to the invention, the problem that the on-site stock area does not have a broken line detection function is solved, the tripping success rate is improved, the error tripping rate is reduced, the reliability of load management work of the transformation area is greatly improved, and meanwhile, by expanding remote signaling and remote control event records, the reliability of the load management work is improved. And abundant field orderly power utilization management data is provided for theoretical analysis of load management work.

In some aspects, a device includes a gating circuit having an enable input, a signal input, and an output, wherein the enable input is configured to receive an enable signal. The device further includes a switching circuit having an output, wherein the switching circuit is configured to switch a logic state at the output of the switching circuit based on the enable signal. The device further includes a multiplexer having a first input, a second input, and an output, wherein the first input of the multiplexer is coupled to the output of the gating circuit, and the second input of the multiplexer is coupled to the output of the switching circuit. The multiplexer is configured to select one of the first input and the second input based on the enable signal and couple the selected one of the first input and the second input to the output of the multiplexer.

A duty cycle measurement (DCM) device includes a charge pump circuit and a clocked comparator circuit. The charge pump circuit is configured to receive a clock signal that has an unknown duty cycle and to generate a capacitor voltage based on the duty cycle of the clock signal. The clocked comparator circuit is configured to receive the capacitor voltage and a reference voltage and to generate a digital output code based on the capacitor voltage and the reference voltage. The digital output code is indicative of the duty cycle of the clock signal. The charge pump circuit is further configured to receive the digital output code. A method of determining a duty cycle of a clock signal is also disclosed.

A device for monitoring a life condition of a spark igniter in a gas turbine ignition system. The device includes an evaluation circuit having circuit components that include a hold capacitor, a transistor, and an operational amplifier arranged to form a sample-and- hold circuit, wherein an igniter spark impulse signal is applied to an input node of the evaluation circuit causing the transistor to turn on and the hold capacitor to discharge for a duration of the igniter spark impulse signal, and wherein a discharged voltage at the hold capacitor is maintained and output by the operational amplifier, the discharged voltage representing the duration of the igniter spark impulse and indicating the life condition of the spark igniter.

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

The present application discloses a pulse detection circuit and a pulse detection method, which can measure higher-speed input pulses while reducing the power consumption of a microcontroller. The pulse detection circuit includes: an input module, an automatic trigger measurement module, and a data latch module. The input end of the input module receives an external input pulse, and the pulse signal is respectively transmitted to the clock pulse end of the automatic trigger detection module and the input end of the data latch module through the output end of the input module. When the pulse signal changes from a first level to a second level, the automatic trigger detection module is enabled, and the output end of the automatic trigger detection module sends a latch signal to the enable end of the data latch module, so that the data latch module latches the pulse signal according to the latch signal.

Methods and systems for detecting and notifying power outages and power quality are described herein. A sensor coupled to a circuit transmits keep-alive packets to a server. The sensor detects an input signal generated by electrical activity. The sensor generates an output signal based on the input signal. The sensor monitors the output signal. During a clock cycle, the sensor determines whether a rising edge occurs and transmits a failure packet to the server if a rising edge occurs before a predetermined clock value or if no rising edge occurs. The server receives the failure packet from the sensor and listens for the keep-alive packets. When no keep-alive packets are received within at least a defined period of time after the failure packet is received, the server transmits a power outage notification. When one or more keep-alive packets are subsequently received, the server transmits a power restoration notification.

The invention discloses an intelligent pulse parameter detection method and system based on deep learning, and the method is used for the automatic analysis of the time-frequency data of a transient astronomical signal, and comprises the steps: S1, an imaging stage: carrying out the physical correction of original FRB signal data observed by a radio telescope, converting the original format of the signal data into a standardized time-frequency graph matrix two-dimensional image; s2, a detection stage: inputting the time-frequency graph into a deep learning model; the deep learning model automatically locates a time-frequency region where an FRB pulse signal is located in background noise through a signal discrimination branch by using the feature extraction capability of the deep learning model; and S3, a regression stage: after the signal area is successfully positioned, the network directly regresses various attributes of the target through two branches, so that predicted values of various pulse parameters of the FRB signal are obtained. According to the method, extraction of a plurality of parameters is integrated into one end-to-end deep learning model, so that the data processing speed is greatly improved, and the processing flow is simplified.

The invention provides a signal monitoring circuit, a control method, a chip and electronic equipment, and belongs to the technical field of electronics. The signal monitoring circuit comprises a signal detection module and an event recording module. The signal detection module comprises a first detection branch and a second detection branch. The first detection branch is used for detecting a first detection signal based on a first edge detection unit and a first counting unit and outputting a first event detection result of the first detection signal; the second detection branch is used for detecting a second detection signal based on a second edge detection unit and outputting a second event detection result of the second detection signal; determining a third event detection result based on the first event detection result and the second event detection result; and the event recording module is used for generating and recording a target event detection result based on the third event detection result. According to the invention, the universality and flexibility of the signal monitoring circuit can be improved.

The invention belongs to the technical field of pulse characteristic measurement, and relates to an on-chip integrated single autocorrelator and a measurement method thereof. The autocorrelator comprises an SOI substrate, a photonic crystal waveguide is formed on the SOI substrate through etching, and an insulating layer, an indium selenide layer and a chromium gold electrode array are sequentially arranged on the photonic crystal waveguide; the photonic crystal waveguide is composed of a straight waveguide area in the middle area and photonic crystal areas on the two sides. The chromium-gold electrode array is composed of a plurality of pairs of chromium-gold electrodes which are arranged at equal intervals in the photonic crystal waveguide direction, and each pair of chromium-gold electrodes serve as a source electrode and a drain electrode respectively; a back gate electrode is arranged on an unetched region of the SOI substrate; during measurement, a p-i-n homojunction is formed in the indium selenide material; the source electrode is connected with the p-type region of the indium selenide layer, the drain electrode is connected with the n-type region of the indium selenide layer, and the indium selenide p-i-n homojunction photoelectric detector is formed by the source electrode and the drain electrode. The problem that an existing autocorrelator is difficult to integrate and cannot meet actual requirements is solved.