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

Distance Corrections01:15

Distance Corrections

167
To achieve precise distance measurements, especially in surveying and construction, certain corrections must be applied to account for potential sources of error like the standardization errors, temperature variations, and slope adjustments.Standardization error emerges when measurement equipment undergoes changes, such as wear, repairs, or weather impacts. To address this, surveyors compare the equipment’s readings to a standard. This process identifies any deviation that might lead to...
167
Common Leveling Mistakes and Errors01:17

Common Leveling Mistakes and Errors

213
A survey team is tasked with determining the elevation difference between points Point A and Point B, separated by uneven terrain. They use a leveling instrument and a leveling rod.Common MistakesMisreading the Rod: During a backsight reading at Point A, the instrumentman observes the rod partially obscured by tall grass. Instead of reading 1.135 m, they mistakenly record 1.735 m due to the misalignment of the crosshair with the wrong graduation. This error adds 0.600 m to all subsequent...
213
Adjusting a Traverse01:12

Adjusting a Traverse

234
In the site survey of a four-sided traverse, internal angles are essential to ensure geometric accuracy. The survey revealed that the sum of the measured internal angles was 359 degrees and 48 minutes, which is 12 minutes less than the expected 360 degrees. This discrepancy signals an error likely arising from measurement inaccuracies during the fieldwork.To rectify this error, the adjustment process involved distributing the 12-minute shortfall equally across the four internal angles. By...
234
Errors in Taping01:18

Errors in Taping

192
Errors in taping arise from multiple factors that can significantly impact measurement accuracy in surveying. Misalignment of the tape, often due to human error, is one primary source. A skilled rear tapeman, using a telescope, can help correct alignment by guiding the head tapeman; however, human limitations still lead to small inaccuracies. These errors may include misplacement of pins or inaccurate tape readings due to common visual confusions, such as mistaking a six for a nine. Such...
192
Linear Approximation in Time Domain01:21

Linear Approximation in Time Domain

206
Nonlinear systems often require sophisticated approaches for accurate modeling and analysis, with state-space representation being particularly effective. This method is especially useful for systems where variables and parameters vary with time or operating conditions, such as in a simple pendulum or a translational mechanical system with nonlinear springs.
For a simple pendulum with a mass evenly distributed along its length and the center of mass located at half the pendulum's length,...
206
Influence of Earth's Curvature and Atmospheric Refraction on Leveling01:26

Influence of Earth's Curvature and Atmospheric Refraction on Leveling

563
During leveling, the Earth's curvature and atmospheric refraction introduce deviations in the line of sight from a true horizontal reference. When the line of sight is leveled, it remains perpendicular to the plumb line only at a single point. Beyond this, it deviates due to the Earth’s curvature, represented by the correction C. For a sight distance D, the deviation can be derived using the relationship:This relationship shows that the deviation increases quadratically with distance. Over a...
563

You might also read

Related Articles

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

Sort by
Same author

Parametric Finite Element Evaluation of Load Redistribution Under Progressive Lumbar Disc Degeneration.

Bioengineering (Basel, Switzerland)·2026
Same author

The Effect of Mild Cyclic Loads on the Stress State of Degenerative Knee Joint Cartilages: A Numerical Study Aided by Experimental Data.

Biomedicines·2025
Same author

Optimization of SiC-TiC Composite Manufacturing by Electroconsolidation Method.

Materials (Basel, Switzerland)·2025
Same author

Self-Calibratable Absolute Modular Rotary Encoder: Development and Experimental Research.

Micromachines·2024
Same author

Material's Strength Analysis of the Coupling Node of Axle of the Truck Trailer.

Materials (Basel, Switzerland)·2023
Same author

A Method to Improve Mounting Tolerance of Open-Type Optical Linear Encoder.

Sensors (Basel, Switzerland)·2023

Related Experiment Video

Updated: Nov 21, 2025

Gain-compensation Methodology for a Sinusoidal Scan of a Galvanometer Mirror in Proportional-Integral-Differential Control Using Pre-emphasis Techniques
09:01

Gain-compensation Methodology for a Sinusoidal Scan of a Galvanometer Mirror in Proportional-Integral-Differential Control Using Pre-emphasis Techniques

Published on: April 4, 2017

8.9K

Thermal and Geometric Error Compensation Approach for an Optical Linear Encoder.

Donatas Gurauskis1, Artūras Kilikevičius2, Albinas Kasparaitis1

  • 1Department of Mechanical and Material Engineering, Vilnius Gediminas Technical University, J. Basanavičiaus g. 28, 03224 Vilnius, Lithuania.

Sensors (Basel, Switzerland)
|January 12, 2021
PubMed
Summary

This study developed a real-time compensation method for optical linear encoders, significantly reducing positioning errors caused by thermal effects. The innovative approach achieved up to a 98% reduction in final positioning errors for precise measurement systems.

Keywords:
coefficient of thermal expansionmeasuring scalethermoelastic deformation

More Related Videos

Automatic Laser-based Geometry Capture for Finite Element Analysis of Weld Beads
07:58

Automatic Laser-based Geometry Capture for Finite Element Analysis of Weld Beads

Published on: July 25, 2025

457
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

6.5K

Related Experiment Videos

Last Updated: Nov 21, 2025

Gain-compensation Methodology for a Sinusoidal Scan of a Galvanometer Mirror in Proportional-Integral-Differential Control Using Pre-emphasis Techniques
09:01

Gain-compensation Methodology for a Sinusoidal Scan of a Galvanometer Mirror in Proportional-Integral-Differential Control Using Pre-emphasis Techniques

Published on: April 4, 2017

8.9K
Automatic Laser-based Geometry Capture for Finite Element Analysis of Weld Beads
07:58

Automatic Laser-based Geometry Capture for Finite Element Analysis of Weld Beads

Published on: July 25, 2025

457
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

6.5K

Area of Science:

  • Metrology
  • Mechanical Engineering
  • Control Systems

Background:

  • Optical linear encoders are crucial for precise positioning in closed-loop control systems.
  • Encoder accuracy is vital for machine performance and process quality.
  • Thermoelastic deformation and ambient temperature fluctuations introduce significant errors in encoder readings.

Purpose of the Study:

  • To experimentally implement a real-time compensation model for geometric and thermal errors in optical linear encoders.
  • To investigate the effectiveness of a parametric function and ambient temperature variation for error approximation.
  • To achieve accurate real-time position readings for linear encoders.

Main Methods:

  • Developed a compensation model approximating encoder error using a parametric function.
  • Calculated linear error components based on ambient temperature variations.
  • Implemented a two-dimensional compensation function and real-time correction using a Field Programmable Gate Array (FPGA) platform.

Main Results:

  • Successfully realized real-time geometric and thermal error compensation for an optical linear encoder.
  • The implemented FPGA-based system corrected encoder position readings in real-time.
  • Experimental results demonstrated a significant reduction in final positioning error, up to 98%.

Conclusions:

  • The developed compensation strategy effectively mitigates thermal and geometric errors in optical linear encoders.
  • FPGA-based real-time compensation is a viable solution for enhancing encoder accuracy.
  • The method significantly improves the reliability and precision of measurement systems.