Jove
Visualize
Contact Us
JoVE
x logofacebook logolinkedin logoyoutube logo
ABOUT JoVE
OverviewLeadershipBlogJoVE Help Center
AUTHORS
Publishing ProcessEditorial BoardScope & PoliciesPeer ReviewFAQSubmit
LIBRARIANS
TestimonialsSubscriptionsAccessResourcesLibrary Advisory BoardFAQ
RESEARCH
JoVE JournalMethods CollectionsJoVE Encyclopedia of ExperimentsArchive
EDUCATION
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab ManualFaculty Resource CenterFaculty Site
Terms & Conditions of Use
Privacy Policy
Policies

Related Concept Videos

Biasing of FET01:22

Biasing of FET

612
Biasing a Junction Field Effect Transistor (JFET) is crucial for setting operational parameters and ensuring efficient functioning in electronic circuits. JFETs are characterized by using a single carrier type in N-channel or P-channel configurations, where the channel is surrounded by PN junctions. These junctions are central to the device's ability to control current flow.
In an N-channel JFET, the structure consists of N-type material forming the channel on a P-type substrate, with the...
612
PI Controller: Design01:24

PI Controller: Design

1.0K
Proportional Integral (PI) controllers are a fundamental component in modern control systems, widely used to enhance performance and mitigate steady-state errors. They are particularly effective in applications such as automatic brightness adjustment on smartphones, where they excel at mitigating steady-state errors for step-function inputs. Unlike PD controllers, which require time-varying errors to function optimally, PI controllers leverage their integral component to address residual...
1.0K
PD Controller: Design01:26

PD Controller: Design

544
In automotive engineering, car suspension systems often employ Proportional Derivative (PD) controllers to enhance performance. PD controllers are utilized to adjust the damping force in response to road conditions. A controller, acting as an amplifier with a constant gain, demonstrates proportional control, with output directly mirroring input.
Designing a continuous-data controller requires selecting and linking components like adders and integrators, which are fundamental in Proportional,...
544
Fast Fourier Transform01:10

Fast Fourier Transform

780
The Fast Fourier Transform (FFT) is a computational algorithm designed to compute the Discrete Fourier Transform (DFT) efficiently. By breaking down the calculations into smaller, manageable sections, the FFT significantly reduces the computational complexity involved. Direct computation of an N-point DFT requires N2 complex multiplications, whereas the FFT algorithm needs only (N/2)log⁡2N multiplications, offering a much faster performance.
The computational efficiency of the FFT becomes...
780
Galvanometer01:25

Galvanometer

2.6K
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.
The galvanometer consists of  two concave-shaped permanent magnets, providing a uniform radial magnetic field in the annular region. In the center, a pivoted coil of fine copper wire is placed in the uniform...
2.6K
Electro-mechanical Systems01:19

Electro-mechanical Systems

1.5K
Electromechanical systems are intricate configurations that effectively combine electrical and mechanical elements to achieve a desired outcome. Central to many of these systems is the DC motor, a device that converts electrical energy into mechanical motion, enabling various applications ranging from simple fans to complex robotic mechanisms.
A key component of the DC motor is the armature, a rotating circuit positioned within a magnetic field. As an electric current passes through the...
1.5K

You might also read

Related Articles

Articles linked to this work by shared authors, journal, and citation graph.

Sort by
Same author

Staged Buried Oral Mucosal Strip Urethroplasty for Long-Segment Post-Hypospadias Urethral Strictures: Achieving Functional Recovery and Distal Meatal Preservation.

International braz j urol : official journal of the Brazilian Society of Urology·2026
Same author

Multi-omics dissection of R-loop dynamics in tumorigenesis: From transcription-replication conflict to therapeutic targets.

Molecular therapy. Oncology·2026
Same author

Shortwave Infrared Upconversion Imaging with Tunable Dual-Resonance Microcavity.

Nano letters·2026
Same author

Ultrafast roll-angle measurement via a polarization-modulated optical frequency comb.

Optics letters·2026
Same author

Supramolecular Assembly of Proteoliposomes Containing Photosensitizers Regulating Energy Synthesis.

Angewandte Chemie (International ed. in English)·2026
Same author

Dual-comb absolute ranging reaches orbit.

Light, science & applications·2026

Related Experiment Video

Updated: Dec 23, 2025

A Random-displacement Measurement by Combining a Magnetic Scale and Two Fiber Bragg Gratings
08:23

A Random-displacement Measurement by Combining a Magnetic Scale and Two Fiber Bragg Gratings

Published on: September 30, 2019

6.6K

An FPGA Platform for Next-Generation Grating Encoders.

Yaodong Han1, Kai Ni1, Xinghui Li1

  • 1Shenzhen International Graduate School, Tsinghua University, Shenzhen 518055, China.

Sensors (Basel, Switzerland)
|April 23, 2020
PubMed
Summary

This study presents a Field Programmable Gate Array (FPGA)-based platform for real-time nanometer-level displacement measurement using grating encoders. The system enables high-speed, accurate multi-axis measurements, overcoming previous processing limitations.

Keywords:
FPGAdiffractiongrating encoderinterferometrymulti-axesreal-time

More Related Videos

Author Spotlight: Fabrication of a Low-Cost, Fiber-Coupled, and Air-Spaced Fabry-Pérot Etalon
07:22

Author Spotlight: Fabrication of a Low-Cost, Fiber-Coupled, and Air-Spaced Fabry-Pérot Etalon

Published on: February 3, 2023

7.8K
A Silicon-tipped Fiber-optic Sensing Platform with High Resolution and Fast Response
09:03

A Silicon-tipped Fiber-optic Sensing Platform with High Resolution and Fast Response

Published on: January 7, 2019

7.6K

Related Experiment Videos

Last Updated: Dec 23, 2025

A Random-displacement Measurement by Combining a Magnetic Scale and Two Fiber Bragg Gratings
08:23

A Random-displacement Measurement by Combining a Magnetic Scale and Two Fiber Bragg Gratings

Published on: September 30, 2019

6.6K
Author Spotlight: Fabrication of a Low-Cost, Fiber-Coupled, and Air-Spaced Fabry-Pérot Etalon
07:22

Author Spotlight: Fabrication of a Low-Cost, Fiber-Coupled, and Air-Spaced Fabry-Pérot Etalon

Published on: February 3, 2023

7.8K
A Silicon-tipped Fiber-optic Sensing Platform with High Resolution and Fast Response
09:03

A Silicon-tipped Fiber-optic Sensing Platform with High Resolution and Fast Response

Published on: January 7, 2019

7.6K

Area of Science:

  • Metrology
  • Instrumentation Engineering
  • Nanotechnology

Background:

  • Grating interferometry linear encoders are crucial for nanometer-level displacement measurement due to their robustness and cost-effectiveness.
  • Advancements seek multi-axis capabilities for simultaneous precision positioning and error motion measurement.
  • Existing systems face challenges in real-time data processing and nanometer resolution for multi-axis measurements.

Purpose of the Study:

  • To design and validate a Field Programmable Gate Array (FPGA)-cored real-time data processing platform for grating encoders.
  • To address the limitations in real-time data acquisition and processing for multi-axis nanometer displacement measurements.
  • To develop a practical system for high-accuracy, high-speed grating encoder data analysis.

Main Methods:

  • A front-end analog circuit with photodetector and I/V conversion for signal filtering.
  • An eight-channel, 16-bit, 200 kSPS Analog-to-Digital Converter (ADC) for digital signal acquisition.
  • An FPGA-based digital signal processing core for parallel, high-speed displacement calculation and USB2.0/UART real-time data transfer.

Main Results:

  • The developed platform successfully achieves real-time data processing and displacement result display.
  • The system maintains nanometer-level resolution, matching the accuracy of traditional offline methods.
  • Experimental validation confirms the system's capability for absolute two-dimensional grating scale displacement measurement.

Conclusions:

  • The FPGA-cored platform provides a robust solution for real-time, high-accuracy nanometer displacement measurement with grating encoders.
  • The system demonstrates significant industrial potential and practicality for multi-axis precision positioning and error analysis.
  • This advancement overcomes previous hardware and real-time processing challenges in grating encoder applications.