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Related Concept Videos

Galvanometer01:25

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Common devices, including car instrument panels, battery chargers, and inexpensive electrical instruments, measure potential difference (voltage), current, or resistance using a d'Arsonval galvanometer. This electromechanical instrument is also known as a moving coil galvanometer.
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Voltage and current measurements using a standard voltmeter and ammeter alter the circuit being measured either by drawing or resisting the current flow, which introduces uncertainties in the measurements. Null measurements balance the voltages so that no current flows through the measuring device and, therefore, no alterations occur in the measured circuit.
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Mechanical vibrators are instrumental in compacting newly poured concrete within formwork and around reinforcements. This process is essential to eliminate trapped air pockets and establish a dense concrete mass. One widely used method is vibrating by internal vibrators, often referred to as a poker vibrator or immersion vibrator. It is rapidly inserted through the full depth of the freshly laid concrete and slightly extends into the layer below it (which remains in a plastic state). Consistent...
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Spontaneous Chemical Reactions
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Van de Graaff generators (or Van de Graaffs) are devices used to demonstrate high voltage due to static electricity that can also be used for research. Robert Van de Graaff first built one in 1931 (based on original suggestions by Lord Kelvin) for use in nuclear physics research.
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Correction: Kang et al. Fluid Flow to Electricity: Capturing Flow-Induced Vibrations with Micro-Electromechanical-System-Based Piezoelectric Energy Harvester. <i>Micromachines</i> 2024, <i>15</i>, 581.

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Updated: Sep 26, 2025

Measurement of Bioelectric Current with a Vibrating Probe
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Published on: January 4, 2011

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Self-Powered Galvanic Vibration Sensor.

Yik-Kin Cheung1, Zuofeng Zhao2, Hongyu Yu1

  • 1Department of Mechanical and Aerospace Engineering, The Hong Kong University of Science and Technology, Hong Kong, China.

Micromachines
|April 23, 2022
PubMed
Summary
This summary is machine-generated.

This study presents an electrochemical vibration sensor that integrates energy storage and sensing. While performance degrades quickly, sensitivity is restorable, showing potential for future rechargeable systems.

Keywords:
batteryelectrochemical vibration sensorself-powered vibration sensorvibration

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Area of Science:

  • Materials Science
  • Electrical Engineering
  • Energy Harvesting

Background:

  • Internet of Things (IoT) development requires compact, robust remote sensing systems with integrated energy harvesting and storage.
  • Existing energy harvesting methods (piezoelectric, triboelectric, electromagnetic) are common, but combined energy storage and sensing is underexplored.

Purpose of the Study:

  • To present an electrochemical vibration sensor that combines energy storage and vibration sensing functionalities.
  • To evaluate the performance characteristics of this integrated system.

Main Methods:

  • Developed an electrochemical vibration sensor utilizing a galvanic cell (Zn-Cu) for energy storage and as a vibration transducer.
  • Characterized the sensor's frequency response, scale factor, long-term stability, impedance, and discharge behavior.

Main Results:

  • Demonstrated the feasibility of integrating energy storage with vibration sensing, achieving promising initial performance.
  • Observed a performance halving within 74 minutes due to spontaneous reactions and ion depletion.
  • Showcased sensitivity restoration by refilling the electrolyte.

Conclusions:

  • The developed sensor proves the concept of integrated energy storage and vibration sensing.
  • Short sensor longevity is a limitation, but electrolyte replenishment offers a temporary solution.
  • Future iterations could employ reversible electrochemical systems for enhanced rechargeability and longevity.