A high-precision detection circuit for capacitive sensor
Abstract: For the capacitance signal of capacitive sensor output is tiny, a capacitive sensor detection circuit is designed to solve the problem of hard measuring. Its sensitivity is …
A light-weight defect detection model for capacitor appearance …
Furthermore, target detection networks are categorized into two-stage detection and one-stage detection based on different network structures. Two-stage detection involves the generation of candidate regions, with prominent methods including R-CNN [12], Fast R-CNN [13], Faster R-CNN [14], Mask R-CNN [15], and more.
Microwave gas sensing with a microstrip interDigital capacitor: Detection of …
Microwave gas sensing with a microstrip interDigital capacitor: Detection of NH 3 with TiO 2 nanoparticles Author links open overlay panel Guillaume Bailly, Amal Harrabi, Jérôme Rossignol, Didier Stuerga, Pierre …
For a given fabrication process, the response of the bossed diaphragm can be controlled by defining both the radius of the boss and the area of the diaphragm. Chavan and Wise (2001) have implemented an array of these structures where the dynamic range of individual sensors in an array has been designed to have peak sensitivities for the various devices …
This capacitor based dash camera from Street Guardian is a dual channel setup with both front and rear cameras recording 1080p video at 30 frames per second. Both cameras use a Sony EXMOR image sensor, which …
The Design and Experimentation of a Corn Moisture Detection …
2.1. Detection Principle. The main components of a capacitor are metal plates and an intermediate medium. When the dielectric constant of the medium changes [], the capacitance will change.The dielectric constant of water is almost 80, far higher than corn [].As a result, the relative dielectric constant is different at different levels of moisture.
Recent Developments in Fault Detection and Power Loss Estimation of Electrolytic Capacitors …
This paper proposes a comparative study of current-controlled hysteresis and pulsewidth modulation (PWM) techniques, and their influence upon power loss dissipation in a power-factor controller (PFC) output filtering capacitors. First, theoretical calculation of low-frequency and high-frequency components of the capacitor current is …
Capacitor Condition Monitoring Method for Low-Capacitance StatComs: An Online Approach Using the Inherent Second …
The cascaded H-bridge low-capacitance static compensator (StatCom) deliberately reduces the capacitor size while allowing large oscillations in capacitor voltages. When a capacitor deteriorates, its capacitance decreases or/and its equivalent series resistance (ESR) increases, compromising StatCom performance and safety. For this reason, the condition …
Research on Self-Healing Discharge Detection Method of …
In modular multilevel converters (MMCs) of HVDC system, the metallized film capacitors (MFCs) suffer from complex electrical stresses. The aging of MFC is related to the accumulation of self-healing processes, which threatens the safety and reliability of the power system. In this study, a test platform was built for applying DC voltage as well as …
Sensorless Capacitor Voltage Detection Method of Cascaded H …
The cascaded H-bridge (CHB) static synchronous compensator (STATCOM) has been widely used in wind farm and conflux station. As the grid-connected voltage increases, the number of CHB proportionately increases. In order to achieve the capacitor voltage balance, it is necessary to independently detect the capacitor voltage of all H-bridge …
For a given capacitor, the ratio of the charge stored in the capacitor to the voltage difference between the plates of the capacitor always remains the same. Capacitance is determined by the geometry of the capacitor and the materials that it is made from. For a parallel-plate capacitor with nothing between its plates, the capacitance is given by
Capacitor Condition Monitoring Method for Low-Capacitance …
Capacitor Condition Monitoring Method for Low-Capacitance StatComs: An Online Approach Using the Inherent Second-Harmonic Oscillations Abstract: The cascaded H …
Capacitive Sensors: How do they work and what can they do?
Introduction. cks of circuit design due to its ability to store and discharge energy through its electric field. In addition to its energ. storage capabilities, the capacitor can also be used …
Capacitive Sensors | Detection Method and Function
Capacitive sensors are noncontact. The sensors detect objects located in their measurement field using the interaction of the object with the external electrical …
Detection of a Chirality-Induced Spin Selective Quantum Capacitance …
Advanced Kelvin probe force microscopy simultaneously detects the quantum capacitance and surface potential of an α-helical peptide monolayer. These indicators shift when either the magnetic polarization or the enantiomer is toggled. A model based on a triangular quantum well in thermal and chemical equilibrium and …
Recent Advances of Capacitive Sensors: Materials, …
Second, linear sensing capability is disrupted when structure engineering is applied to improve the sensitivity of capacitive strain sensors. In other words, it is challenging to …
An automatic detection system for film capacitor based on DCS …
In this paper, an automatic pipeline system is proposed to detect the exterior defects of film capacitors. The industrial personal computer (IPC) and micro-controller unit (MCU) are used in the pipeline as the main controllers. And the distributed control system (DCS) theory is applied to build the platform. Specifically, the proposed automatic detection system …
Capacitive proximity sensors are non-contact devices that can detect the presence or absence of virtually any object regardless of material. They use the …
Ask The Application Engineer—35 Capacitance Sensors for …
A: These capacitance-to-digital converters are designed specifically for capacitance sensing in human-interface applications. The core of the devices is a 16-bit sigma-delta capacitance-to-digital converter (CDC), which converts the capacitive input signals (routed by a switch matrix) into digital values.
Neuro-Inspired HTM-Based Online Capacitor Aging Detection of DC-Link Capacitors …
Understanding the aging mechanisms of electronic components in critical in power electronic converters. Capacitors are crucial components to monitor as they contribute to approximately 30% of electronic component failures in power electronic converters. The paper introduces a novel approach that utilizes a neuro-inspired Hierarchical Temporal …
hold capacitor (CHOLD) to form a voltage divider with an external conductive sensor. Through a series of steps, ... First Sample Second Sample r VDD VSS T im e e or The CVD feature allows users to quickly configure the ADC2 module to be used for capacitive sensing applications in software. The registers associated with the configuration of the ...
Capacitive Voltage Divider as an AC Voltage Divider
After a period of time equal to about "5RC" or 5 time constants, the plates of the capacitor are fully charged equalling the supply voltage and no further current flows. At this point the reactance of the capacitor to DC current flow is at its maximum in the mega-ohms ...
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 …
Recent Advances of Capacitive Sensors: Materials, …
1 Introduction. Wearable, flexible, and stretchable sensors based on piezoresistive, triboelectric, piezoelectric, and capacitive mechanisms have experienced rapid advancement to meet sensing demands in a diverse range of applications (e.g., soft prosthetic hand for amputees [1-4] and flexible, human activity recognition and body signal monitoring, [5, 6] …
