公开(公告)号：US4335603A

公开(公告)日：1982-06-22

申请号：US177722

申请日：1980-08-13

申请人： Stephen A. Locke

发明人： Stephen A. Locke

IPC分类号： G01L5/10 ,  G01L5/04 ,  G01N29/00

CPC分类号： G01L5/042

摘要： Tension in a moving web is measured by subjecting the web to an ultrasonic pulse train and measuring the time interval for the resultant transverse waves in the web to proceed a known distance past a point upstream (or downstream). The composite web plus wave velocity is calculated and the web travel time is added (or subtracted) to obtain wave velocity which is related to tension in accordance with the equation T=a.sup.2 w/g.sub.c, where T=web tension, a=wave velocity, w=mass per unit area and g.sub.c =lb mass ft/lb force sec.sup.2 conversion factor.

摘要翻译： 通过使幅材经受超声波脉冲串并测量网中产生的横波的时间间隔，通过上游（或下游）的点行进已知距离来测量移动幅材中的张力。 计算复合网加波速，并根据公式T = a2w / gc，添加（或减去）网路行进时间以获得与张力相关的波速，其中T =腹板张力，a =波速， w =单位面积质量，gc = lb质量ft / lb力sec2转换系数。