ELIMINATION OF THE ANOMALOUS HUMIDITY EFFECT IN PRECISION CAPACITANCE BASED TRANSDUCERS

被引：3

作者：

BERTONE, GA

MEIKSIN, ZH

CARROLL, NL

机构：

[1] UNIV PITTSBURGH,DEPT ELECT ENGN,PITTSBURGH,PA 15261

[2] MEASURETON INC,BUTLER,PA 16001

来源：

IEEE TRANSACTIONS ON INSTRUMENTATION AND MEASUREMENT | 1991年 / 40卷 / 06期

关键词：

D O I：

10.1109/19.119764

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

An anomalous humidity effect has been observed in a precision capacitor-based displacement transducer. This effect displays a threshold, well below the dew point, above which the capacitance change exceeds by far the increase in moisture-caused dielectric constant of the air dielectric. This effect, common to air capacitors in general, results from water vapor adsorption on insulator surfaces. It can be eliminated by shielding the capacitor in a way which removes the humidity sensitive flux from the internal electric field of the capacitor.

引用

页码：897 / 901

页数：5

共 6 条

[1] NOISE-ANALYSIS FOR THE TRIAXIAL CAPACITIVE DISPLACEMENT TRANSDUCER [J].

BERTONE, GA ;

MEIKSIN, ZH ;

CARROLL, NL .

IEEE TRANSACTIONS ON INSTRUMENTATION AND MEASUREMENT, 1990, 39 (05) :735-738

[2] INVESTIGATION OF A CAPACITANCE-BASED DISPLACEMENT TRANSDUCER [J].

BERTONE, GA ;

MEIKSIN, ZH ;

CARROLL, NL .

IEEE TRANSACTIONS ON INSTRUMENTATION AND MEASUREMENT, 1990, 39 (02) :424-428

[3]

Ford L.H., 1948, J I POWER ENG, V95, P709, DOI DOI 10.1049/JI-2.1948.0199

[4]

LEA, 1945, J I ELEC ENG 2, V92, P261

[5] Dielectric constant of water vapor [J].

Stranathan, JD .

PHYSICAL REVIEW, 1935, 48 (06) :538-544

[6] Association, adsorption, and dielectric constant [J].

Zahn, CT .

PHYSICAL REVIEW, 1926, 27 (03) :0329-0340

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