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Related Concept Videos

Position and Displacement01:31

Position and Displacement

25.1K
The position of an object defines its location relative to a convenient frame of reference at any particular time. A frame of reference is an arbitrary set of axes from which the position and motion of an object are described. Earth is often used as a frame of reference, and we often describe the position of an object as it relates to stationary objects on Earth. For example, a rocket launch could be described in terms of the position of the rocket with respect to Earth as a whole. On the other...
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Position and Displacement Vectors01:00

Position and Displacement Vectors

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To describe the motion of an object, one should first be able to describe its position (where it is at any particular time). More precisely, the position needs to be specified relative to a convenient frame of reference. A frame of reference is an arbitrary set of axes from which the position and motion of an object are described. Earth is often used as a frame of reference to describe the position of an object in relation to stationary objects on Earth.
Further, several important kinds of...
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Distance Problem01:29

Distance Problem

61
When an object's velocity changes over time, the total distance traveled can be determined by summing small displacement intervals over short increments. This approach approximates the true distance through numerical summation and the use of integral calculus. An estimate of the total displacement can be obtained by measuring velocity at regular intervals and multiplying each value by the corresponding time step.If a runner accelerates over the first three seconds of a race, speed measurements...
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Displacement Current01:19

Displacement Current

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Ampère's law, in its usual form, does not work in places where the current changes with time and is not steady. Thus, Maxwell suggested including an additional contribution, called the displacement current, Id, to the real conduction current I.
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Distance Corrections01:15

Distance Corrections

285
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...
285
The Distance Formula01:20

The Distance Formula

606
In geometry, measuring the direct distance between two points on a plane is essential in various practical and theoretical applications. Whether in navigation, engineering, or computer graphics, determining the shortest path between two locations involves using the distance formula. This formula is derived from the Pythagorean Theorem, which relates the lengths of the sides of a right triangle. On a coordinate plane, the horizontal and vertical distances between two points serve as the legs of...
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Related Experiment Video

Updated: Jan 25, 2026

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

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Laser Sensors for Displacement, Distance and Position.

Young Soo Suh1

  • 1School of Electrical Engineering, University of Ulsan, Namgu, Ulsan 44610, Korea. yssuh@ulsan.ac.kr.

Sensors (Basel, Switzerland)
|April 27, 2019
PubMed
Summary
This summary is machine-generated.

Laser sensors measure object distance, displacement, and position using optical techniques. Advancements have decreased size and cost, enabling wider use in robotics, autonomous driving, and biomedical fields.

Keywords:
displacement sensorsdistance sensorslaser sensorsoptical sensorsposition sensors

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Area of Science:

  • Optoelectronics and Sensor Technology
  • Optical Metrology

Background:

  • Laser sensors utilize diverse optical principles like triangulation, time-of-flight, confocal, and interferometry for precise measurements.
  • Technological advancements have significantly reduced the size and cost of laser sensors, driving their adoption across various sectors.

Discussion:

  • The decreasing footprint and cost of laser sensors facilitate integration into complex systems.
  • Expanding applications beyond traditional manufacturing into robotics, surveillance, autonomous vehicles, and biomedical fields highlight sensor versatility.

Key Insights:

  • Laser sensors offer robust solutions for measuring distance, displacement, position, surface profiles, and velocities.
  • Miniaturization and cost-effectiveness are key drivers for the expanding application scope of laser sensor technology.

Outlook:

  • Continued innovation in laser sensing is expected to further enhance precision and broaden applicability.
  • Future research will likely focus on integrating advanced laser sensors into next-generation autonomous and intelligent systems.