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This paper proposes a capacitor detection method based on YOLO algorithm for printed circuit board (PCB) assembly. YOLO is a kind of fast object detection method based on convolutional …
This paper proposes a capacitor detection method based on YOLO algorithm for printed circuit board (PCB) assembly. YOLO is a kind of fast object detection method based on convolutional …
This study examined normal capacitors and the fault detection of power capacitors with different attenuation degrees (20%, 40%, 60%, 80%, and failure). The faults …
The deposition of a film composed of graphene oxide particles as the dielectrics of the capacitor allows to measure the gas concentration of CO 2 and NO mixed with N 2. The sensors were characterized in a gas chamber with a constant flow, obtaining promising results in changes of capacitance at 100 Hz.
Learn about the failure mechanisms and monitoring methods for different types of capacitors in power electronics. See examples of capacitor failures, lifetime indicators, and spectral analysis …
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Here, we demonstrate a new concept of exploring synchronization effects for capacitive sensing. This paper presents a novel validation of high sensitivity capacitive readout method based on …
Learn how capacitive sensors detect both metallic and non-metallic objects using an electrical alternating field. Find out the advantages, applications, and history of this sensing principle and …
BACK EMF DETECTION DURING PWM ON TIME BY ST7MC t0~t1: The capacitor starts to discharge by the inductance. At the beginning, since the capac - itance is small, the discharging rate is very fast, but as the voltage reduces, the rate drops. At time t1, the capacitor is fully discharged, an d the diode D turns on. The current passes through
Key learnings: Capacitor Definition: A capacitor is defined as a device that stores electric charge in an electric field and releases it when needed.; How to Test a Capacitor: To test a capacitor, you need to disconnect it, discharge it, and use a multimeter, resistance, or voltmeter to check its condition.; Multimeter Testing: Involves measuring capacitance directly to …
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Features - 1. 100% brand new and high quality. 2. This V014 Pro PCIE is the latest graphics card extension cable with temperature and voltage detection. 3. Upgrade 10 capacitors, power supply is more stable and safe. 4. PCI-E GPU extender features and has good performance, it can be used for a long time. 5. The PCI-E GPU adapter features a stable resistance and has LED light …
Defect scenario N° 1: One wrong value capacitor detection: A data matrix was generated containing a wrong value capacitor C1 inserted in PCB6. After running a PCA on the data, results for both defect cases a and b (see Table 3) show that PCB6 is isolated from the non-faulty PCB cluster. As the calculated PC2 coordinates in both cases is the ...
A finite set MBPC (Model based predictive control) based fault detection technique for OC fault detection in flying capacitor inverter. It utilizes the switching functions to detect the fault and take corrective action [108]. To begin with, a mathematical model is developed for 3 phase flying capacitor inverter for all the switch fault ...
Discover the significance of capacitor self-resonant frequency in electronic circuits. Explore how this characteristic influences performance, stability, and efficiency. Learn about measurement techniques, applications, and considerations for choosing the right capacitor. Stay ahead of emerging trends and developments in this essential aspect of circuit design.
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In this article, we demonstrate the radiation detection performance of vertical metal-oxide-semiconductor (MOS) capacitors fabricated on 20 μm thick n-4H-SiC epitaxial layers with the highest ...
Supercapacitors have received wide attention as a new type of energy storage device between electrolytic capacitors and ... capacity and higher energy density. Compared with batteries [3], supercapacitors have higher power density (10–100 times higher than that of batteries ... while leak testing and continuous leak detection are carried out. ...
Capacitance detection, dominated by dielectric effects, is less sensitive to charge effects and, thus, offers increased signal-to-noise ratio, improved sensor recovery, and larger dynamic range. ... Dive into the research topics of ''Improved chemical detection using single-walled carbon nanotube network capacitors''. Together they form a unique ...
To address the problem, an online monitoring method for capacitor conditions based on sensorless capacitor voltage detection is proposed. Initially, the mapping relationship …
The power capacitor discharge detection testing platform is shown in Figure 2. The overall experimental process was comprised of the power capacitor defect construction and a self-made detection circuit design (high-pass filter and …
In [9], Bailly et al. used a microstrip interdigital capacitor surrounded by a sensing layer of titanium dioxide (TiO 2 ) nanoparticles for the detection of ammonia concentration in the range from ...
To verify the effectiveness of the proposed approach, samples of PCB images with nine kinds of capacitors are collected and trained by YOLO. Experimental results show all the types of …
Parallel Plate Capacitor 100%. Heavy Metal Detection 100%. Alkali Metal Ions 100%. Output Voltage 50%. Peak Power Output 50%. Liquid Solution 50%. Capacitance 50%. Chemical Elements 50%. Engineering Application 50%. Pb(NO3)2 50%. Sensing Technique 50%. Environmental Applications 50%. Oscilloscope 50%.
The aging detection of dc-link capacitors has great significance in enhancing the reliability of the power electronic converters in photovoltaic applications. This chapter summarizes the wear-out failure characteristics of capacitors, including degradation models and end-of-life criteria. Generally, two categories of methods are applied to ...
The main aim of this paper is to develop and exploit a model able to mimic accurately the electrical response in a frequency range spanning from 1.5 GHz to 2.9 GHz, and for different concentrations of O 2, ranging from 0% to 100% v/v at a room temperature. To develop the model, artificial neural networks (ANNs) have been chosen as the modelling tool.
This paper presents wavelet transform based fault detection scheme for the protection of series capacitor compensated double circuit transmission lines. Three phase current of both circuits measured at relay location are used for the detection of fault. Three phase current of both circuits are processed using Daubechies-4 mother wavelet up to level-1. Performance of wavelet …
For the electronic component detection problem in the PCB assembly scene, the current research mainly includes six aspects: small size object detection [37,38], PCB …
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Patcharoen T., Ngaopitakkul A., Pothisarn C., et al: ''Simulation analysis of the switching of 230 kV substation shunt capacitor banks with a 6% series reactor for limiting transient inrush currents and oscillation overvoltage'', Electr. Eng., 2018, 100, (2), pp. 1–25
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The studied sensor consists of a microstrip interdigital capacitor covered by a gas sensing layer made of titanium dioxide (TiO2). To explore the gas sensing properties of the developed sensor, oxygen detection is considered as a case study. The sensor is electrically characterized using the complex scattering parameters measured with a vector network …
The main works of this paper are: (1) develop an AOI system for capacitor polarity defect detection, propose the framework and measurement method of a light source …
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