21results about "Form factor measurements" patented technology

A vehicle, system and method for monitoring an occurrence of thermal runaway in a battery pack of the vehicle. The system includes a plurality of voltage sensors and a processor. The plurality of voltage sensors obtains a plurality of voltage measurements at each of a plurality of battery cells of the battery pack. The processor is configured to determine a mean value based on the plurality of voltage measurements, compare a voltage measurement obtained from a selected battery cell to the mean value, and generate a notification signal when a difference between the voltage measurement from the selected battery cell and the mean value is greater than or equal to a prognostic threshold.

The invention relates to the technical field of electric power system analysis, and discloses a method for analyzing waveforms in an electric power system.The method comprises the steps of data collection, data preprocessing, feature extraction, comparative analysis and result display.The waveform data of multiple data points are collected in real time through a voltage transformer and a current transformer, the data accuracy is ensured, and the analysis accuracy is improved. Voltage and current waveform characteristics are comprehensively analyzed through feature extraction, and the monitoring accuracy is improved; comparing and analyzing, judging abnormity according to a preset threshold value and determining an accurate abnormity level, and clearly dividing normal and different risk levels by calculating a deviation rate and an analysis factor in combination with a preset abnormity factor threshold value set, so that related personnel can quickly know the risk degree to take measures; results are displayed visually and clearly, key data and risk levels are presented to related personnel, problems can be found in time, maintenance and repair are carried out, and the stability and reliability of the system are improved.

A vehicle, system, and method for monitoring a vehicle battery pack for the occurrence of thermal runaway. The system includes a plurality of voltage sensors and a processor. The plurality of voltage sensors obtain a plurality of voltage measurements at each of a plurality of battery cells in the battery pack. The processor is configured to determine an average value based on the plurality of voltage measurements, compare a voltage measurement obtained from a selected battery cell to the average value, and generate a notification signal when a difference between the voltage measurement from the selected battery cell and the average value is greater than or equal to a prediction threshold.

Techniques for imaging low duty cycle signals using a scanning electron microscope. Systems, components, methods, and algorithms for generating differential data are described. A computer-implemented method includes directing a first pulse of charged particles toward a sample. The method may include generating first detector data based at least in part on an interaction between the charged particles of the first pulse and the sample. The method may include directing a second pulse of charged particles toward the sample. The method may include generating second detector data based at least in part on an interaction between the charged particles of the second pulse and the sample. The method may also include generating differential data using the first detector data and the second detector data, wherein the differential data describes a change between an "on" state of the sample and an "off" state of the sample.

A computer-implemented method for performing an enhanced resolution time domain reflectometry is provided. Aspects include obtaining a plurality of waveforms by transmitting a first pulse on a transmission line, transmitting a second pulse on the transmission line, where the second pulse is transmitted after the first pulse by a delay, and capturing and measuring reflections of the transmitted pulses, where the delays corresponding to each of the plurality of waveforms are different. Aspects also include identifying a discontinuity of the transmission line based at least in part on the plurality of waveforms. Based on determining that the transmission line includes a discontinuity, the aspects include calculating a third derivative curve for each of the plurality of waveforms, and calculating a length of the discontinuity of the transmission line based on the third derivative curves. Aspects also include creating a notification indicative of the location and length of the discontinuity of the transmission line.

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.

Techniques for efficient compression of sensor data are described herein. In an example, metrology data is received from a metrology device, the metrology data comprising one or more of: voltage (V) data; current (A) data; resistive power (W) data; and volt-amps reactive power (VAR) data. The metrology data is processed, wherein the processing comprises: performing peak-detection on the metrology data, to create data-signals comprising: a timestamped peak- values data-signal; and a peak-removed data-signal. Median-filtering is performed on the peak-removed data-signal, wherein a median-filtered data-signal is created. Level-shift detection is performed on the median-filtered data-signal, wherein a timestamped level-shift data-signal is created. The data is sent to a server. The data may include the timestamped peak-values data-signal and the timestamped level-shift data-signal.

Exemplary embodiments are disclosed of methods and systems of power detection in RF circuits to provide gain compensation for vehicle systems. In exemplary embodiments, a module (e.g., a front end module (FEM), compensor, compensator, etc.) includes a gain modifier, a power detector, and a controller. The power detector is configured to detect a power output of the gain modifier. The controller is configured to determine a mean of n samples taken by the power detector. The controller is also configured to determine a boundary to mean ratio of the n samples. The controller is further configured to adjust a detected value of the power detector based on the mean and the boundary to mean ratio.

Computer-implemented methods for performing time-domain reflectometry with improved resolution are provided. These methods include obtaining a plurality of waveforms by transmitting a first pulse on a transmission line, transmitting a second pulse on the same line with a delay after the first, and detecting and measuring reflections of the transmitted pulses, where the delay corresponding to each waveform is different. The methods also include identifying a discontinuity in the transmission line, at least partially, based on the plurality of waveforms.Based on a determination that the transmission line contains the discontinuity, aspects include calculating third-derived curves for each from the plurality of waveforms, as well as calculating the length of the transmission line discontinuity based on these third-derived curves. Aspects also include generating a notification that specifies the location and length of the transmission line discontinuity.

A high-frequency QRS waveform curve analysis method comprises: acquiring a high-frequency QRS waveform curve; selecting the high-frequency QRS waveform curve in a preset time period as a reference waveform curve; selecting a point with the minimum root-mean-square voltage on the reference waveform curve as a first reference point; selecting a second reference point meeting a first selection condition and a third reference point meeting a second selection condition, wherein the time of the first reference point is later than that of the second reference point and earlier than the third reference point; based on the first reference point and the second reference point, determining an amplitude falling relative value; based on the first reference point and the third reference point, determining an amplitude rising relative value. If the amplitude falling rising relative values meet a preset condition, determining reference information according to the high-frequency QRS waveform curve.

Disclosed is a method for the predictive maintenance of a machine through the degree of current waveform imbalance of multiple power units, in which, by means of collecting current waveforms on the basis of current values consumed in power units of a machine, and overlapping the collected current waveforms with each other, thereby detecting the degree of waveform imbalance, signs of mechanical abnormality in the respective power units may be detected, and at the same time, various signs of abnormality such as defects in components associated with the power units of the machine or an error in a control system for controlling the power units may also be detected.

Computer-implemented methods for performing enhanced resolution time-domain reflectometry are provided. Aspects include obtaining a plurality of waveforms by transmitting a first pulse on a transmission line, transmitting a second pulse on the transmission line, where the second pulse is transmitted after the first pulse by a delay, and capturing and measuring reflections of the transmitted pulses, wherein the delay corresponding to each of the plurality of waveforms is different. Aspects also include identifying a discontinuity of the transmission line based at least in part on the plurality of waveforms. Based on a determination that the transmission line includes the discontinuity, aspects include calculating third derivative curves for each of the plurality of waveforms and calculating a length of the discontinuity of the transmission line based on the third derivative curves. Aspects also include creating a notification indicating a location and the length of the discontinuity of the transmission line.

Systems, components, methods, and algorithms for generating difference data are described. A computer-implemented method includes directing a first pulse of charged particles toward a sample. The method can include generating first detector data based at least in part on interactions between the charged particles of the first pulse and the sample. The method can include directing a second pulse of charged particles toward the sample. The method can include generating second detector data based at least in part on interactions between the charged particles of the second pulse and the sample. The method can also include generating difference data using the first detector data and the second detector data, wherein the difference data describe a change between an “on” state of the sample and an “off” state of the sample.

A high-frequency QRS waveform curve analysis method comprises: acquiring a high-frequency QRS waveform curve; selecting the high-frequency QRS waveform curve in a preset time period as a reference waveform curve; selecting a point with the minimum root-mean-square voltage on the reference waveform curve as a first reference point; selecting a second reference point meeting a first selection condition and a third reference point meeting a second selection condition, wherein the time of the first reference point is later than that of the second reference point and earlier than the third reference point; based on the first reference point and the second reference point, determining an amplitude falling relative value; based on the first reference point and the third reference point, determining an amplitude rising relative value. If the amplitude falling rising relative values meet a preset condition, determining reference information according to the high-frequency QRS waveform curve.

Exemplary embodiments of a method and system for power detection in RF circuits are disclosed for providing gain compensation for vehicle systems. In the exemplary embodiments, a module (e.g., a front-end module (FEM), a compensator, etc.) includes a gain modifier, a power detector, and a controller. The power detector is configured to detect a power output of the gain modifier. The controller is configured to determine an average value of n samples collected by the power detector. The controller is further configured to determine a bound on a ratio of the n samples to the mean values. The controller is further configured to adjust a detected value of the power detector based on the average value and the bound on the ratio to the mean value.

Computer-implemented methods for performing enhanced resolution time-domain reflectometry are provided. Aspects include obtaining a plurality of waveforms by transmitting a first pulse on a transmissi

The invention relates to the technical field of lightning protection, and discloses a lightning parameter adaptive identification intelligent lightning protection switching device comprising a lightning parameter real-time monitoring unit used for collecting original electric signals of lightning impulse in real time, the original electric signals at least comprising lightning current amplitude, gradient, waveform characteristics and electromagnetic pulse intensity; according to the invention, through double-unit cooperation and an intelligent algorithm, the lightning type and the threat level are accurately identified, and a double-protection mode of hundred microsecond high-speed switching is matched, so that the pain points of easy shielding failure, difficult grounding and weak electromagnetic pulse protection of traditional lightning protection are solved; by means of linkage of a dynamic threshold value model and environment parameters, a protection strategy is optimized in a self-adaptive mode, the whole-course recording and remote reporting functions are combined, the lightning stroke risk and economic loss are greatly reduced, the protection effect and operation loss are considered, and practicability and economical efficiency are outstanding.

Systems, components, methods, and algorithms for generating difference data are described. A computer-implemented method includes directing a first pulse of charged particles toward a sample. The method can include generating first detector data based at least in part on interactions between the charged particles of the first pulse and the sample. The method can include directing a second pulse of charged particles toward the sample. The method can include generating second detector data based at least in part on interactions between the charged particles of the second pulse and the sample. The method can also include generating difference data using the first detector data and the second detector data, wherein the difference data describe a change between an “on” state of the sample and an “off” state of the sample.

Disclosed is a predictive maintenance method for a device based on current waveform imbalance of a multi-power unit, wherein real-time current waveforms are collected on the basis of values of currents consumed in respective power units of the device, and the collected real-time current waveforms are superimposed on each other to continuously detect waveform imbalance such that a mechanical abnormality in each of the power units can be detected, and various abnormalities such as defects in components associated with the power units of the device or errors in a control system for controlling the power units can also be detected.

The present application provides a distribution network lightning monitoring method and system, which relates to the field of information technology, including: obtaining dynamic change data of environmental factors through real-time monitoring of the ambient temperature and humidity along the distribution line, and using it as the input of the mathematical model of the insulator performance parameters to obtain the final mathematical model of the insulator performance parameters that can adapt to changes in environmental conditions; obtaining and combining the insulator manufacturing database, determining the specific manufacturing process parameters of the insulator according to the optimal combination of insulator materials and structural parameters that meet the actual needs of the distribution line, producing and putting the distribution line into operation; if it is found that the insulator has a hidden fault, according to the location and model of the faulty insulator, matching the corresponding replacement product from the insulator manufacturing database, and triggering the instruction of insulator replacement to ensure the safe and stable operation of the distribution line. The precise optimization of insulator performance and fault prediction are achieved, and the lightning protection capability and operation reliability of the distribution line are improved.

Provided in the present application are an arc signal processing circuit and method, and an electrical device. The arc signal processing circuit includes: an amplification module, wherein an input end of the amplification module is connected to an arc signal, and the amplification module is used for amplifying the arc signal and then outputting an amplified signal; a band-pass filtering amplification module, wherein an input end of the band-pass filtering amplification module is electrically connected to an output end of the amplification module, and the band-pass filtering amplification module is used for filtering and amplifying the amplified signal outputted from the amplification module and then outputting a high-frequency signal in a preset frequency band; and a main control module, wherein the main control module is electrically connected to the output end of the amplification module, and the main control module is electrically connected to an output end of the band-pass filtering amplification module. In the present application, the amplitude of a half-wave signal and an arc energy value of the half-wave signal in a high-frequency signal are compared with corresponding threshold values, and whether an arc signal fault occurs is identified according to a comparison result, such that the accuracy in identification of arc fault of an electrical device is improved.