公开(公告)号：US20150077738A1

公开(公告)日：2015-03-19

申请号：US14027883

申请日：2013-09-16

Applicant: Honeywell ASCa Inc.

Inventor： Michael Kon Yew Hughes ,  Sebastien Tixier ,  Stuart James Heath

IPC: G01B11/06 ,  G01N15/08

CPC classification number: G01B11/0691 ,  B65H20/10 ,  D21F7/06 ,  G01B7/107 ,  G01N15/0826 ,  G01N21/86 ,  G01N33/346 ,  G01N2015/086 ,  G01N2021/8609 ,  G01N2201/101

Abstract: Dual mounting head scanners measure the thickness of flexible moving porous webs and employ an air clamp on the operative surface of the lower head to maintain the web in physical contact with a measurement surface. As the web is held firmly by the clamp, the vacuum level that is established is indicative of the porosity of the membrane. As compressed air is supplied to a vacuum generator at a given operational pressure, the rate of airflow through the web can be interred from the vacuum pressure measurements. The rate of airflow through the membrane and therefore the porosity of the membrane are related to the vacuum level. It is not necessary to measure the airflow through the membrane. From the vacuum pressure measurements, the membrane's permeability can also be determined by correlation to empirical data. Thickness measurements are effected by optical triangulation and inductive proximity measurements.

Abstract translation: 双重安装头扫描仪测量柔性移动多孔网的厚度，并在下头的操作表面上采用气夹，以保持网与测量表面物理接触。 当网状物通过夹具牢固地固定时，建立的真空度表示膜的孔隙率。 由于在给定的操作压力下将压缩空气供应到真空发生器，所以可以从真空压力测量值中排出通过幅材的气流速率。 通过膜的气流速率以及膜的孔隙率与真空度有关。 没有必要测量通过膜的气流。 从真空压力测量，膜的渗透性也可以通过与经验数据的相关性来确定。 厚度测量通过光学三角测量和感应接近度测量来实现。