Search research articles

ABOUT JoVE

Overview Leadership Blog JoVE Help Center

AUTHORS

Publishing Process Editorial Board Scope & Policies Peer Review FAQ Submit

LIBRARIANS

Testimonials Subscriptions Access Resources Library Advisory Board FAQ

RESEARCH

JoVE Journal Methods Collections JoVE Encyclopedia of Experiments Archive

EDUCATION

JoVE Core JoVE Business JoVE Science Education JoVE Lab Manual Faculty Resource Center Faculty Site

Terms & Conditions of Use

Related Concept Videos

Electronic Distance Measuring Instruments

Electronic Distance Measuring Instruments

Electronic Distance Measuring Instruments (EDMs) are essential tools in modern surveying, offering precise distance measurements by emitting electromagnetic signals and calculating the time required for these signals to travel to a target and return. Two primary types of signals are used in EDMs — light waves and microwaves — each suited to specific environmental and distance requirements. Light-wave-based EDMs utilize either infrared or laser light, providing high accuracy over short distances...

Leveling Equipment

Leveling Equipment

As leveling involves measuring vertical distances relative to a horizontal line of sight, it requires a graduated rod, called a level rod, for vertical measurements and an instrument called a level for a horizontal sight line. A level includes a high-powered telescope with a mechanism for leveling to ensure the line of sight is horizontal when the bubble in the spirit level is centered. Leveling rods, made of wood, metal, or fiberglass, are graduated in feet or meters and commonly used in two-...

Confocal Fluorescence Microscopy

Confocal Fluorescence Microscopy

Confocal microscopy is an advanced microscopic technique. The prime advantage of the confocal microscope over other microscopy techniques is its ability to block the out-of-focus light from the illuminated samples using pinholes. It is widely used with fluorescence optics to obtain high-resolution, sharp contrast images. Unlike optical microscopes, confocal microscopes use a focused beam of light laser to scan the entire sample surface at different z-planes. These microscopes are, therefore,...

You might also read

Related Articles

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

Sort by

Same author

Development and validation of a nomogram to assess recurrence risk in young patients with breast cancer based on preoperative serum tumor markers.

Gland surgery·2026

Same author

Multi-cohort integration and machine learning identify CPVL as a novel oncogenic driver in gastric cancer.

Discover oncology·2026

Same author

Piezo3 is a novel mechanosensitive Piezo ion channel in vertebrates.

bioRxiv : the preprint server for biology·2026

Same author

Evolutionary analysis of vertebrate KCNH voltage-gated potassium channels and their expression in zebrafish embryos.

bioRxiv : the preprint server for biology·2026

Same author

PRMT5 is Frequently Upregulated and a Potential Therapeutic Target in MTAP-deficient Malignant Peripheral Nerve Sheath Tumors.

bioRxiv : the preprint server for biology·2026

Same author

Influence of heat-reinforcing Needling on the PPAR-γ/NF-κB signaling pathway in the synovial membrane of rats with rheumatoid arthritis.

Histology and histopathology·2026

Search research articles

Related Experiment Video

Updated: May 8, 2026

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

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

Published on: September 30, 2019

High-dynamic angle measurement based on laser displacement sensors.

Junhua Sun¹, Jie Zhang, Zhen Liu

¹Key Laboratory of Precision Opt-mechatronics Technology, Ministry of Education, Beihang University, Beijing, China.

|August 14, 2013

Summary

This study introduces a new photoelectric method using three laser displacement sensors for accurate real-time dynamic angle measurement. The system achieves high precision even at high speeds, overcoming current limitations.

More Related Videos

Compact Lens-less Digital Holographic Microscope for MEMS Inspection and Characterization

Compact Lens-less Digital Holographic Microscope for MEMS Inspection and Characterization

Published on: July 5, 2016

Related Experiment Videos

Last Updated: May 8, 2026

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

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

Published on: September 30, 2019

Compact Lens-less Digital Holographic Microscope for MEMS Inspection and Characterization

Compact Lens-less Digital Holographic Microscope for MEMS Inspection and Characterization

Published on: July 5, 2016

Area of Science:

Optics and Photonics
Measurement Science and Metrology
Mechanical Engineering

Background:

Accurate real-time dynamic angle measurement is challenging, especially with high precision and wide angular ranges.
Existing methods often struggle to balance accuracy, speed, and measurement range effectively.

Purpose of the Study:

To propose and validate a novel photoelectric measurement method for dynamic angles using three laser displacement sensors (LDSs).
To establish a dynamic angle vision measurement model and calibrate the system for real-time angle calculation.

Main Methods:

A system employing three LDSs projecting laser beams onto a rotating plane to capture three noncollinear points synchronously.
Offline calibration using a planar target moved by a 2D platform to establish a dynamic angle vision measurement model.
Real-time calculation of rotation angle based on acquired point data.

Main Results:

Simulations confirmed the theoretical feasibility of the proposed photoelectric measurement method.
Experimental results demonstrated high measurement accuracy: 0.008° at 80°/s (quasi-static) and 0.046° at 1000°/s (highly dynamic).
The system operates effectively within a measurement range of approximately ±40°.

Conclusions:

The proposed three-LDS photoelectric method provides a viable solution for accurate real-time dynamic angle measurements.
The method demonstrates robust performance across different speeds and a significant measurement range.
This technique offers a significant advancement in dynamic angle measurement technology.