[PDF] Online capacitor early ageing monitoring and detection
This study deals with a new approach for real‐time detection of early ageing in DC‐link electrolyte capacitors of DC–DC converters. The method is based on the comparison between the slope of
Filter capacitor degradation detection apparatus and method
Power conversion systems and methods are presented for detecting input filter capacitor degradation or approach of end of operational life based on filter capacitor current
New method of capacitors failure detection and location in
XConsecutive failures detection XLive reporting of number of failed capacitors XAdvance alarm for externally fused SCBs fuse-saving XApplied for banks grounded through CT/ Capacitor (Neutral Voltage Unbalance) Method Discussed in [9]–[11], [15] Method of [13] X X Disclaimer 2 Mentions manual re-set [11], [15] (no demonstration) Disclaimer 2 Mentioned in [15] (no
Development of quench detection/protection system based on
In a conventional active power method, the inductive voltage is removed using a cancel coil with m = 0.17 mH, height of 100 mm, width of 100 mm and depth of 27 mm shown in Fig. 2.The cancel coil is an air-core toroidal transformer (number of turns: primary coil 8, secondary coil 10,000) and its secondary coil has a self-inductance of 0.2 H.. Therefore many
US11181419B2
A threshold detection circuit includes a plurality of capacitors. A plurality of switching circuits is coupled to the capacitors such that a first end of each of the capacitors is coupled to a corresponding photon sensor during detection intervals, and the first end of each capacitor is coupled to a variable initialization value during reset intervals.
An Accurate GNSS Spoofing Detection Method Based on Multiscale Eye Diagrams
3 天之前· Spoofing detection is critical for GNSS security. To address the issues of low detection rates and insufficient coverage in traditional methods, this study proposes an eye diagram detection method based on the multiscale Canny algorithm with minimum misjudgment probability (EDDM-MSC-MMP). Unlike conventional correlation peak distortion detection techniques, the
TW202032099A
A threshold number of the capacitors are initialized to a first value and the remaining capacitors are initialized to a second value during reset intervals. A comparator is coupled to a second of...
Online Capacitor Voltage Transformer Measurement Error State
Y. Q. Liu et al. DOI: 10.4236/sgre.2024.151003 35 Smart Grid and Renewable Energy measurement and control of high-voltage power grids, along with energy mea-
Capacitive Sensing Techniques and Considerations
A current DAC (iDAC) is connected to the bus with the external capacitor and the switched capacitor network to charge the external capacitor and comparator input to a threshold voltage.
Detection indicators of different threshold determination methods
By comparing with the Peak Over Threshold (POT) method and the epsilon method, the effectiveness of the adaptive threshold method is shown, and the results are shown in Table 3.
General scheme for fault detection and isolation with
Download scientific diagram | General scheme for fault detection and isolation with adaptive thresholds. from publication: IGBT fault diagnosis using adaptive thresholds during the turn-on
A Novel Real-Time Threshold Algorithm for Closed-Loop Epilepsy
Epilepsy, as a common brain disease, causes great pain and stress to patients around the world. At present, the main treatment methods are drug, surgical, and electrical stimulation therapies. Electrical stimulation has recently emerged as an alternative treatment for reducing symptomatic seizures. This study proposes a novel closed-loop epilepsy detection
How can we adjust the DESAT detection threshold?
The methods to adjust the DESAT detection threshold involve making changes to the components in series between the pin and the IGBT collector. These methods are summarized in DESAT Table 1 Changing the number of series HV blocking diodes allows us to the threshold in
Fast Plug-in Capacitors Polarity Detection with
Fast Plug-in Capacitors Polarity Detection with Morphology and SVM Fusion Method in Automatic Optical Inspection System November 2022 DOI: 10.21203/rs.3.rs-2233925/v1
Online capacitor early ageing monitoring and detection using
This study deals with a new approach for real-time detection of early ageing in DC-link electrolyte capacitors of DC–DC converters. The method is based on the comparison between the slope of the inductor current derived from a reference dynamic model and
On-chip capacitance mesurement
The CBCM method can be also used to measure a difference of two capacitances (Fig.3), allowing practically to eliminate parasitic capacitances of interconnects always present in
(a) Threshold-detection comparator (b) Block Diagram of the
The SAR ADC utilizes the split capacitor array DAC with a non-conventional split-capacitor value. The influence of switches in the capacitive DAC on the ADC''s non-linearity is analysed.
CN102736000B
The invention discloses an on-line detection method and device for a power capacitor. A current sensor is used for collecting a noise-contained local electric discharge signal of a capacitor; after the signal is processed, a complex signal is decomposed into limited intrinsic mode function components by empirical mode decomposition; the intrinsic mode function components are
Threshold Detection ADC For Continuous Monitoring Applications
acquisition, signal processing and threshold detection [3]. This This publication has emanated from research supported in part by a research grant from Science Foundation Ireland (SFI) and is co-funded under the European Regional Development Fund under Grant Number 13/RC/2077. work introduces a threshold detection based ADC, where the
Microsoft Word
Threshold levels for noise and finger response are optimized and set at power up. Let us understand by taking most common scenarios how auto tuning is beneficial
Fast Plug-in Capacitors Polarity Detection with
Fig. 1 System structure and application diagram. Fig. 2 A prototype of AOI on PCBA production line. Fig. 3 Flow chart of capacitor polarity detection method. 3.2 Light Source
Flow chart for obtaining the DTW threshold from
In this work, we address a low-cost test of switched capacitors filters embedded in configurable analog sections. The proposal improves the Transient Analysis Method (TRAM) by incorporating a...
Energy-Delay Performance of Capacitive Threshold Logic
Digital threshold detection is a fundamental logic function that is heavily utilized in a large family of arithmetic processors and neural networks.
(a) Threshold-detection comparator (b) Block Diagram of the
ADC was implemented in a 0.18 μm CMOS process. A block diagram of our implemented ADC is shown in Fig. 2 (b). The integral nonlinearity (INL) of the ADC for a sample selection of codes, is shown
Implementing Accurate Peak Detection
An alternative peak detecting method to the sample and hold technique can be created using a special I/O (SIO) pin available on PSoC 3 and PSoC 5. SIO pins provide a programmable input threshold that allows the SIO pin to function as an analog comparator. When a signal is supplied as an input threshold, it passes through a reference generator
The principle of traditional
The threshold detection method is to detect specific echo signals by setting a threshold voltage [39,45,46]. Its advantage is a simple operation, but the detectable ranges of defects and
Capacitive Sensors | Detection Method and Function
All Pepperl+Fuchs proximity sensors were, and continue to be, developed, manufactured, and marketed in accordance with the relevant standard IEC/EN 60947 "Low-voltage switchgear and controlgear—Part 5-2: Control circuit devices and switching elements—Proximity switches.". For Pepperl+Fuchs safety-related sensors, the relevant standard "Low-voltage switchgear and
Threshold detector circuit and method
A threshold detector circuit and method for providing an output signal indicative of the relative magnitude of an input signal with respect to a predetermined threshold...
EP0700159A1
A threaded detection circuit (102) generating a detection signal (R) when a power supply voltage (Vcc) exceeds a predetermined threshold, comprises: a first detection stage (104) connected between the power supply voltage (Vcc) and a reference voltage, including a first pull-up device (108) and a first switching device (134) connected in series and providing a control node (109)
An Automatic Optical Inspection Algorithm of Capacitor Based on
The accuracy of capacitor detection is 93.91%. Fan et al. [1] uses based on Haar-like feature and AdaBoost classifier to recognize and classify plug-in capacitors with eight directions. In
6 FAQs about [Capacitor threshold detection method diagram]
What happens when a comparator reaches a threshold voltage?
This voltage is also one input of a comparator. When the input of the comparator reaches the threshold voltage, a discharge circuit (resistor to ground) is connected and charge is bled off of the external capacitor at a rate determined by the starting voltage across the capacitor and the bleed resistor value.
What is capacitive sensing with successful approximation and a single-slope ADC?
Capacitive sensing with Successive Approximation and a Single-slope ADC uses a similar switched-capacitor network to the two previously described sensing methods. A current DAC (iDAC) is connected to the bus with the external capacitor and the switched capacitor network to charge the external capacitor and comparator input to a threshold voltage.
How to optimize sensor scan time based on parasitic capacitance?
Thus, based on the sensor parasitic capacitance (CP), the sensor scan time needs to be optimized for SNR, response time, and power consumption. The Finger Threshold is set to indicate a finger touch. This Finger threshold should be set carefully to avoid false triggering because of noise and atmospheric changes.
Which method is used to measure capacitance change?
Charge Transfer, Successive Approximation, Sigma-Delta, and Mutual Capacitance Measurement are the most commonly used sensing methods. Each is described here. Sensing capacitance change from 10pF to 100pF is not difficult. Sensing capacitance change from 10.0pF and 10.5pF is not trivial but does not present significant challenges.
How difficult is detecting capacitance change from 10.00pf to 10.05pf?
Sensing capacitance change from 10.00pF to 10.05pF is quite challenging, especially when doing so in the presence of environmental changes, system-level electromagnetic interference and measurement control circuitry variance. Challenges may be even more severe when also considering power consumption, response time, and usability.
What are capacitance sensing methods?
At the heart of this development are the sensing methods themselves, the process by which capacitance is measured and converted into digital values that can be processed, manipulated and interpreted. Charge Transfer, Successive Approximation, Sigma-Delta, and Mutual Capacitance Measurement are the most commonly used sensing methods.