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3D激光掃描儀

Focus S

Focus S Plus

Focus M

Focus3D

Focus3D X

Focus3D X HDR

Focus3D S

FARO®知識庫

Focus3D 的质量设置功能

质量 - 会影响采用固定扫描分辨率时的扫描质量及扫描时间。它使用户借助一个简单的滑块即可实现扫描质量与速度之间的平衡。向上移动滑块可减少扫描数据的噪音,由此提高扫描质量,但也会延长扫描时间。向下移动滑块可缩短扫描时间,提高扫描项目的效率。“质量”滑块通过变换测量速率或应用额外的噪音压缩来设置质量等级。

 质量设置和过滤器没有任何关系,不会因为更改质量滑块禁用任何过滤器。我们的“质量”定义与距离测量的噪音相关。 测距噪音有两个非常明显的影响:

  1. 平对象上扫描点云的厚度。测距噪音越高,扫描点云越厚。
  2. 远距离对象上的有效扫描点数量。测距噪音越高,剩下的扫描点越少。因此测距噪音也是扫描仪的有效范围的限制因素。

测距噪音的主要因素是传感器电子元件,即通过评定传入信号确定距离。每个电子元件的信号处理行为都有轻微波动,最后会给传入信号加入不同数量的无用信号。如果与传入信号相比这些添加的无用信号相对较小,则测距噪音便很小。如果相对较大,测距噪音即增加。因此强信号的测距噪音小,而弱信号的大。

提高信号强度的一种方法是增加观察时间。我们观察传入的激光光源的时间越长,我们获得的能量就越多,信号就越强。质量系数 1x 到 4x 只是观察时间的不同的表达方式:1x 有最小的观察时间,为每扫描点 1µs,4x 为每扫描点 8 µs。