USE OF MAGNETIC FORCES TO CONTROL DISTANCE IN A SURFACE FORCE APPARATUS

被引：33

作者：

STEWART, AM

CHRISTENSON, HK

机构：

[1] Dept. of Appl. Math., Res. Sch. of Phys. Sci., Australian Nat. Univ., Canberra, ACT

来源：

MEASUREMENT SCIENCE AND TECHNOLOGY | 1990年 / 1卷 / 12期

关键词：

D O I：

10.1088/0957-0233/1/12/007

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

A simple system that permits the surface separation to be varied smoothly and accurately in a surface force apparatus is described. It is based on the deflection of the force-measuring spring in a magnetic field gradient created by a current passing through two coils. The resulting displacement of the surface is highly linear with applied current and free of hysteresis over separations of 10 mu m or more. This allows the accurate measurement of the force between two surfaces by monitoring the difference between expected and observed spring deflection (using, for example, multiple-beam interferometry).

引用

页码：1301 / 1303

页数：3

共 12 条

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