Application Solutions

Radius (R) / Inner Diameter

Finding The Right Solution for Radius Measurements

When looking for the best way to measure radius (R) / inner diameter, there are a number of important factors to consider, including the type of measurement system and the installation environment. Selecting equipment that doesn't adequately meet your needs can lead to insufficient precision and increased man-hours during production, so choosing the right equipment is important. This site is designed to help you discover the best way to perform radius/ inner diameter measurements with confidence.

How to Measure Radius (R) and Inner Diameter

Find the best measurement method and the right equipment to measure "Radius (R) and Inner Diameter".

Measurement of radius (R)

Example Application: Radius measurement of a drum seam

Optimal measurement system

Optimal measurement system2D Laser Displacement Sensor

The line laser irradiates the target and obtains a profile of the surface from which to calculate radius.

The radius of the curved shape and the coordinates for the center position can be calculated internally.
KEY POINTS

By using 2D measurement, radius (R) can be measured directly without having to calculate the approximate R externally based on individual point data.

  • 2D Triangulation Method.
    In-line Multi-point measurement.
    World's Fastest sampling rate at 64,000 images/sec.

    LJ-X Series

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  • Multi-color confocal method
    Linearrity：From ±0.2μm
    Confocal Displacement sensor

    CL Series

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Measurement of inner diameter of a ring shape

Example Application: Inner diameter measurement of bearings

Optimal measurement system

Optimal measurement systemThrubeam 2D Optical Micrometer

The inner diameter is measured from the image obtained using the 2D optical projection method.

An approximate radius is measured using the data from within the specified arc area.
KEY POINTS

Even if the target shifts within the measurement range, radius can be correctly measured using the position correction function.

  • 2D Telecentric Optical Method. Simultaneous measurement of up to 100 with calibrated high-speed measurement.

    TM-X Series

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Measurement of inner diameter of a cylinder shape

Example Application: Inner diameter measurement of cylinder blocks

Optimal measurement system

Optimal measurement systemLaser Displacement Sensor

Hole diameters are measured by bending the optical axes of two sensor heads 90° using a prism.

A
Center of hole
B
Diameter
KEY POINTS

The laser beams travel parallel through the center of the hole and strike prisms to reflect on to opposite inner walls. The workpiece can be rotated to measure roundness and eccentricity.

  • Multi-color confocal method
    Linearrity：From ±0.2μm
    Confocal Displacement sensor

    CL Series

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  • Spectral Interference Method
    Ultra-high resolution of 1 nm
    2 mm microprocess sensor head

    SI Series

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