26results about "Pulse characteristics measurements" patented technology

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 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 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.

The utility model discloses a duty ratio detection device, a duty ratio calibration device and electronic equipment, and the device comprises a first filtering unit which carries out the high-frequency filtering of an input signal, and outputs a first signal; the first signal processing unit is provided with a first input end for inputting a first signal, a second input end for inputting a reference signal and an output end for outputting a second signal; an integrating circuit that accumulates a difference between the first signal and the reference signal; the second filtering unit is used for performing high-frequency filtering on the signal output by the integrating circuit; the first signal processing unit comprises a control module and a first operational amplifier, the control module controls a first signal input by the first input end to be alternately input into the positive pole input end and the negative pole input end of the first operational amplifier, and a reference signal input by the second input end is input into the other input end of the first operational amplifier; and the first operational amplifier is controlled to output corresponding output signals to the output end of the first signal processing unit based on signals input by the positive pole input end and the negative pole input end of the first operational amplifier.

The application discloses a filtering method for pulse width measurement, which firstly determines whether the pulse signal frequency in a first specified time period is stable, if stable, corrects the pulse width value according to the real-time cycle width, real-time high level width and real-time low level width obtained by real-time measurement, and determines whether the signal state of the current measurement pulse is full high, full low or normal according to the corrected pulse width value, then determines the number of the three signal states in a second specified time period, and determines the real-time signal state as the state with the largest number; if unstable, determines the real-time signal state according to the level for capturing the input pin in a third specified time period; finally, determines the output pulse width value according to the real-time signal state.

A method and system for separating and determining the total jitter component of a signal under test includes a process for obtaining the time interval error (TIE) spectrum of the signal under test. The TIE spectrum contains multiple frequency bins. This method identifies the frequency bins in the TIE spectrum that contain deterministic jitter. This method includes a process for determining the total jitter component of the signal based on the frequency bins in the N-UI spectrum of the signal under test that correspond to the identified frequency bins in the TIE spectrum.

Systems, methods, and circuits for determining a duty cycle of a periodic input signal are provided. A delay element is configured to delay the periodic input signal based on a digital control word. A digital circuit is configured to generate a first digital control word used to delay the periodic input signal a first amount of time corresponding to a period of the periodic input signal, generate a second digital control word used to delay the periodic input signal a second amount of time corresponding to a portion of the periodic input signal having a logic-level high value, and generate a third digital control word used to delay the periodic input signal a third amount of time corresponding to a portion of the periodic input signal having a logic-level low value. A controller is configured to determine the duty cycle based on the first, second, and third digital control words.

This application discloses and provides a method and apparatus for collecting high-frequency power supply signals. The method includes: determining a rising edge section and a falling edge section within a current pulse period based on the power change amount of continuous sampling points and a predetermined determination threshold; determining abnormal data bits corresponding to the rising edge section of the pulse ramp determination module and the falling edge section of the pulse ramp determination module in a sampling array; setting the abnormal data bits to 0, a null signal value, or a low-level value of the signal, or skipping the output of the data of the abnormal data bits of the pulse ramp determination module when outputting sampling data, thereby solving the problem in the prior art that high-frequency power supplies are continuously sampled and the ramp signals generated during switch switching and in PULSE mode cannot be accurately read.

The application discloses a kind of measurement method, device, judging method and system of pulse extraction column pulse amplitude.The measurement method includes the following steps: measuring the pulse pressure of two measuring points on the pulse leg of pulse extraction column, and the two measuring points are arranged in upper and lower interval.According to the pulse pressure data at the two measuring points, the pulse frequency and the time difference of the pressure change at the two measuring points are obtained.The interval between the two measuring points is obtained.According to the interval between the two measuring points, the time difference and the pulse frequency, the pulse amplitude of the pulse extraction column is calculated.The measurement method can conveniently and quickly measure the pulse amplitude parameter of pulse extraction column.

The present invention provides an electronic circuit, a drive circuit, and a calculation method that can more accurately calculate the slew rate of the current flowing through a switching element. [Solution] The electronic circuit according to this embodiment includes: a timing detection unit that detects a voltage generated in the parasitic inductance of a switching element whose drive is controlled according to a control signal, and detects a first timing when the voltage is less than or greater than a predetermined value, and a second timing after the first timing when the voltage is greater than or less than the predetermined value; and a calculation unit that calculates the slew rate of the current flowing through the switching element based on the current flowing through the switching element at the first timing and the second timing.

The application provides a method and system for realizing loopback test based on algorithm switching. The method does not require external equipment, and one key can complete the whole process of transmission, collection and analysis. The method can realize integrated self-loopback, reduce operation difficulty, greatly reduce test time, and improve test efficiency. The method uses FPGA dynamic reconfiguration, supports multiple test scenes through algorithm switching, improves test controllability and integration, and reduces hardware cost.

This application discloses a current sharing calibration method, a current sharing calibration circuit, and an electronic device. The current sharing calibration method includes: obtaining a zero-point calibration duty cycle using a first current sharing test voltage of the current sharing bus under no-load conditions and an initial zero-point calibration duty cycle to generate a first pulse width signal; adjusting the reference output voltage of the power supply regulation circuit using the first pulse width signal and the initial proportional calibration pulse width signal to obtain a first current sharing bus voltage; obtaining a proportional calibration duty cycle using a second current sharing test voltage of the current sharing bus under full-load conditions, the maximum target output current, the maximum current sharing bus voltage, and the initial proportional calibration duty cycle to generate a second pulse width signal; and adjusting the reference output voltage using the first pulse width signal and the second pulse width signal to obtain a second current sharing bus voltage. Through the above methods, the current sharing calibration method of this application can effectively balance the accuracy of the current sharing bus under both light and full load conditions.

The present disclosure relates to the field of semiconductor circuit design, and particularly relates to a signal detection system and a memory detection method, which comprises a signal generator, which generates a reference test signal based on external parameters, the reference test signal being a clock signal satisfying a preset duty cycle; the reference test signal is subjected to duty cycle test based on a test circuit to determine whether the function of the test circuit is normal; if the function of the test circuit is normal, different test modules are selected in turn based on a test control signal, and the signals output by the selected test modules are subjected to duty cycle test based on the test circuit; the test module comprises a signal conversion module and a write clock path. The present disclosure selects different test paths to test whether the duty cycle of the high-speed clock signal in different transmission paths meets the requirements, so as to ensure the stability of memory data processing.

A detector for detecting a periodic square wave (PSW) includes: an interface circuit configured to generate a serial bit stream (SBS) by sampling an input signal carrying the PSW; a decimation encoder circuit (DEC) coupled to the interface circuit and configured to generate, for every first number of bits in the SBS, a symbol in a symbol stream; a pulse width estimator (PWE) configured to generate, for each symbol generated by the DEC, an estimate of a width of a most recent pulse (MRP) in a sequence of bits in the SBS, where the sequence of bits correspond to a pre-determined number of most recent symbols generated by the DEC; and a state machine coupled to the PWE and configured to declare detection of the PSW in response to detecting that the estimate of the width of the MRP is within a pre-determined range for a pre-determined period of time.

The present application relates to the field of environmental micro energy collection, in particular to a self-driven power management circuit suitable for pulse type energy collection. Based on the theory of maximum energy cycle output, the RC differential circuit is used to perform differential processing on the positive and negative pulse signals, the corresponding peak and valley information of each is extracted, the peak information is transmitted to the first energy storage control circuit A to generate a positive switch control signal for transmission to the switch circuit, and the valley information is transmitted to the first energy storage control circuit B to generate a negative switch control signal for transmission to the switch circuit. In the switch circuit, through the cooperation of the positive switch control signal and the negative switch control signal, the bidirectional detection of the output pulse signal at the peak and valley positions is completed. Thus, the self-driven power management of the pulse type energy collector is realized without the aid of an external power supply.

A negative electrode included in a secondary battery according to the present disclosure is a free-standing type electrode including a negative electrode active material but not having a current collector, and includes a first negative electrode tab and a second negative electrode tab extended in opposite directions. It may be possible to measure the resistance of only the negative electrode without disassembly of the secondary battery and accurately the resistance of the negative electrode. In addition, it may be possible to determine the degree of degradation of the negative electrode by measuring the resistance of the negative electrode.

The application provides a magnetron filament demotion method and device, computer equipment and a storage medium, relates to the technical field of medical instrument control, and determines an initial treatment plan based on a single pulse dose by acquiring treatment demand information and calibration parameters of a magnetron, and further predicts the magnetron input average power corresponding to each treatment stage, determines a filament demotion scheme on this basis, and performs cyclic iteration on the initial treatment plan in combination with a demotion stability index, so as to obtain a target demotion scheme and a target treatment plan. Therefore, the filament demotion strategy matched with each treatment stage can be determined in advance before radiotherapy starts, the hysteresis caused by the demotion control based on the current state or the state at the last moment in the prior art is reduced, the filament demotion is better adapted to the dynamically changing treatment plan, the stability of the magnetron operation is improved, and the service life of the magnetron is prolonged.

The application relates to the field of measurement while drilling, and discloses a pump stroke cycle detection method and a detection system, in particular to a method for detecting a pump stroke cycle by using a pressure sensor. The application does not depend on a pump stroke sensor, but detects a mud pulse signal by using the pressure sensor, accurately detects a pump stroke cycle by using a peak value detection and a spectrum analysis method, corrects an outlier of the detected pump stroke cycle by periodically detecting a signal peak value and combining a mud pump basic frequency obtained through spectrum analysis, and further obtains an accurate pump stroke cycle position. The technical scheme can reduce the cost and improve the stability and accuracy of the system in a harsh drilling environment.

This invention provides a method, apparatus, and electronic device for predicting high-altitude electromagnetic pulse (HEP) waveforms. The method first acquires characteristic parameters of the HEP at a target location, including peak value, rise time, and full width at half maximum (FWHM). Then, a predicted waveform of the HEP is generated based on these characteristic parameters. This prediction method improves the accuracy of HEP waveform prediction by reconstructing the waveform based on the characteristic parameters of the target location. Furthermore, this method only requires the characteristic parameters of the target location, effectively reducing the sample size and computational load compared to existing solutions, thus improving the efficiency of HEP waveform prediction.

This invention discloses a method and system for extracting discharge pulses from power electronic devices based on deep learning. The method includes: acquiring and preprocessing multiple cycles of current signals and square wave voltage signals to form a dataset; extracting physical prior features based on the square wave voltage signals, including region partitioning probability, theoretical displacement current, and voltage derivative features; constructing a deep neural network integrating a global-local attention mechanism; building an adaptive partitioned physical constraint loss function, including region-weighted reconstruction loss, monotonicity / flatness / energy conservation constraint loss, frequency domain consistency loss, and smoothing regularization loss; training the neural network to reconstruct the displacement current and calculating the residual to obtain the discharge pulse. This invention achieves end-to-end automated discharge pulse extraction without manual parameter setting, exhibits excellent generalization performance under small sample conditions, and significantly improves the efficiency and accuracy of power electronic device quality inspection.

The application discloses a lightning stroke surge pulse parameter automatic measurement method, device and medium, and the method comprises the following steps: acquiring a pulse waveform data group, wherein the pulse waveform data group comprises actually collected sampling points, and the sampling points comprise time and amplitude parameters; performing filtering processing on the data of the sampling points; extracting a part related to pulse parameter measurement from the data of the sampling points after the filtering processing, removing useless sampling points, and obtaining a pulse effective part; based on the pulse effective part, the pulse effective part is split into a rising edge and a falling edge by taking the maximum peak value of the pulse waveform as a boundary or taking the minimum peak value of the pulse waveform as a boundary; according to a target point required by pulse parameter measurement, interpolation is performed between sampling points on both sides of the target point; and the peak value, the wave front time and the duration are measured and calculated according to the sampling points and the interpolation points. The application has a significantly improved automation degree, and improves test efficiency and measurement accuracy.

This invention relates to a management device for detecting defects in the busbar fastening and cell-to-cell welding conditions of a battery pack using electrochemical impedance spectroscopy (EIS) technology. The device comprises: a current generation unit for applying a set alternating current to the battery pack; a voltage measurement unit for measuring the voltage generated at each battery cell or across the busbars by means of the current; an impedance calculation unit for calculating impedance using the measured current and voltage values; and a data output unit for generating a Nyquist plot or Bode plot based on the calculated impedance and outputting the impedance change.

This invention belongs to the field of power equipment, specifically relating to a pulse input counting method for a dedicated transformer terminal, a pulse input counting module, and a corresponding dedicated transformer terminal. The counting method includes the following steps: S1: Detect the connection status of the pulse output device. S2: Set the interrupt trigger condition of the MCU to the rising and falling edges of the received pulse signal. S3: Set a preset delay for the interrupt start time. S4: Register the interrupt handling process and detect the type of triggered pulse. S5: If triggered by a falling edge, set the pulse start flag to a high level; if triggered by a rising edge, set the pulse end flag to a high level. S6: When both the pulse start and end flags are high, count the pulses. S7: Obtain the pulse count value and pulse interval according to a preset sampling period, calculate the pulse power, and complete the power data statistics. This invention solves the problem that traditional pulse detection methods struggle to balance MCU load and detection accuracy.

The utility model provides a kind of detection device of mutual inductor, including equipment fixture, the inside detachably of equipment fixture is provided with detection equipment body, the rear side of equipment fixture is provided with distance adjusting mechanism, the side of distance adjusting mechanism is provided with lifting adjusting mechanism, which drives its up and down movement adjustment, away from equipment fixture;Equipment fixture has C-shaped support frame, the inside of C-shaped support frame is provided with upper pressing groove, the bottom of upper pressing groove is matched with the top of detection equipment body, the top of upper pressing groove;In the utility model, the detection device of mutual inductor is installed on wall surface by lifting adjusting mechanism, reduces desktop space occupancy, releases desktop operation area, and more quantity of detection equipment can be set in parallel in station, to meet different detection needs.