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Thickness

For Individuals Looking for Thickness Measurement Systems

当寻找测量厚度的最佳方法时，需要考虑许多重要因素，包括目标的形状和材料和测量系统的类型。选择无法充分满足您需求的设备可能会导致精确度不足并在生产过程中增加工时，因此请确保选择正确的设备。该站点旨在帮助那些寻求厚度测量系统的人发现自信地进行测量的最佳方法。

How to Measure Thickness (sheet form)

Find the best measurement method and the right equipment to measure "Thickness (sheet form)".

卷之间透明目标的测量

Example Application: Thickness measurement of transparent films

最佳测量系统

最佳测量系统反射位移传感器

当灯导向透明目标时，从顶部和底部表面反射光。通过计算从顶部和底部反射的光的位置差来测量厚度。

A
前线（峰值1）
B
Back (Peak 2)
C
透明玻璃
关键点

位移传感器选择很重要

  • Does the displacement sensor have enough range to see both the top and bottom surfaces?
  • Check to see if stable measurement is possible even if the reflectance of the top and bottom surfaces is different.

Measurement of opaque targets between rolls

示例应用：塑料板的厚度测量

最佳测量系统

最佳测量系统反射激光位移传感器

Thickness is measured by passing a target between two sensor heads.

关键点

Optical-axis alignment or span adjustment are important to ensure that A+B is fixed even if there is workpiece run-out up or down.

滚筒上的厚度测量（目标行进方向存在空间）

示例应用：卷后厚度测量

最佳测量系统

最佳测量系统Thrubeam 2D Optical Micrometer

安装了传感器头，以便将滚子和目标的顶部表面投影为捕获图像上的单个平面。通过测量从辊到目标顶部的步骤来发现厚度。

关键点

可以测量透明和不透明目标的厚度。由于针对辊子测量了目标的厚度，因此请确保在辊子和目标之间没有形成间隙。

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

    TM-X系列

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厚度测量辊(没有空间总统ent in the direction of target travel)

Example Application: Thickness measurement of rubber sheets

最佳测量系统

最佳测量系统反射激光位移传感器

当目标周围缠绕（即密切接触）时的高度差，厚度由滚筒表面作为零点缠绕。

关键点

可以测量透明和不透明目标的厚度。由于针对辊子测量了目标的厚度，因此请确保在辊子和目标之间没有形成间隙。

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How to Measure Thickness (misc. workpieces)

Find the best measurement method and the right equipment to measure "Thickness (misc. workpieces)".

Measurement of transparent targets

示例应用：涂层膜的厚度测量

最佳测量系统

最佳测量系统反射位移传感器

当灯导向透明目标时，从顶部和底部表面反射光。通过计算从顶部和底部反射的光的位置差来测量厚度。

A
前线（峰值1）
B
Back (Peak 2)
C
透明玻璃
关键点

位移传感器选择很重要

  • Does the displacement sensor have enough range to see both the top and bottom surfaces?
  • Check to see if stable measurement is possible even if the reflectance of the top and bottom surfaces is different.

Measurement of opaque targets using height difference from reference

Example Application: Thickness measurement of sealing material

最佳测量系统

最佳测量系统Reflective 2D Laser Displacement Sensor

Thickness is found by simultaneously measuring the base surface and target using a 2D laser displacement sensor and measuring step from the obtained profile.

A
获得的形状
关键点

当目标表面和参考表面之间存在差距时，就会发生误差。

  1. 使用具有高精度的基础表面，例如表面板。
  2. 使用真空接触或磁性接触。

使用上述步骤改善安装将显着提高测量精度。

顶部和底部表面之间不透明目标的测量

Example Application: Thickness measurement of wafers

最佳测量系统

最佳测量系统反射激光位移传感器

Thickness is measured by passing a target between two sensor heads.

关键点

Optical-axis alignment or span adjustment are important to ensure that A+B is fixed even if there is workpiece run-out up or down.

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Precautions during Measurement of Thickness between Two Sensor Heads

About optical-axis alignment

When you measure a workpiece between two sensor heads, the measured thickness will not change, in principle, even if the workpiece vibrates up and down.
但是，如果两个传感器头的光轴彼此不排列成直线，则由于工件上下振动，可能导致测量误差。注意以下几点并安排安装，以便可以对齐光轴。

  1. To minimize the effect of the optical axes being misaligned, install sensor heads close to the rollers and select a location where the workpiece tension is stable and the distance from one roller to the next is small.
    这使得可以用少量工件弯曲和振动进行测量。
  2. Orient the sensor heads so that the directions of the projected and received light are perpendicular to the direction of movement of the workpiece, as shown in the figure.
    This makes it difficult for the sensor heads to be affected by tilting and shaking in the workpiece's direction of movement due to vibration during transportation.
  3. 在光轴排列过程中，测量一块薄薄的树脂或纸作为临时测量目标。当您测量这些目标时，激光点通过目标，可以看到。安装传感器头，以便即使目标在上下移动，目标的正面和背面也总是对齐。
[参考]检查目标的正面和背面上的斑点即使目标在上下移动，也总是对齐。
激光斑点略微错位。
The laser spots are aligned.
Set the sensor heads so that the centers of the laser spots are aligned even if the target is moved up and down.
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在滚筒上方厚度测量的预防措施

关于滚筒和工件之间的差距

当用该滚筒作为参考测量滚筒上工件的厚度时，如果滚筒和工件之间存在差距，则将发生测量误差。
Pay attention to the following points and arrange the installation so that no gaps occur.

  1. 尽可能多地对工件施加紧张。
    If the tension is weak, the workpiece will not be in full contact with the roll, so a gap ranging from a few micrometers to some tens of micrometers will occur.
    We recommend that you perform measurements with a tension of 50 N or more applied, but be sure to consider the tensile strength of the workpiece.
    Perform measurements from a location in which the workpiece tension is as stable as possible, the distance from one roller to the next is small, and the workpiece is positioned on top of the roller.
  2. 将光轴与滚子的峰位置对齐。
    As shown in the figure, if the optical axis is misaligned from the peak position of the roller, a measurement error (gap Z) occurs.
    1. Install a mechanism that makes it possible to fine-tune the sensor head position in the feed direction.
    2. Perform measurements on a roll with a large diameter to minimize gap Z even if the optical axis is misaligned from the peak position of the roll.
    You will have to make modifications such as those listed here.

关于滚子偏心

When a roller rotates, measurement errors may be created due to the eccentricity of the roller.
请注意以下几点，以取消滚筒偏心的影响。

  1. 当用于测量厚度的位置都是工件的边缘时，同时测量滚子表面和工件表面，以从步骤值中找到厚度。
  2. 当用辊子作为参考测量滚筒上的工件时，您可以以相同的旋转角度（位置）进行测量，以取消偏心率的影响，即使滚筒以偏心方式移动。
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指数

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