Patent · US Expired

Method and apparatus for measuring electrical or magnetic fields

US4920522A · kind A · utility

1Cited by

14References

7Claims

0Family size

Assignee

Siemens Aktiengesellschaft · DE

Inventors

Wilhelm Duerr · Erlangen, DE
Ralph Oppelt · Uttenreuth, DE

Key dates

Filing date	Apr 22, 1987
Grant date	Apr 24, 1990
Priority date	—
Expiry date	Apr 22, 2007

Classification

Technology area (CPC G)Physics
CPC primaryG01R33/3692
WIPO fieldMeasurement
WIPO sectorInstruments

Abstract

A method and apparatus for measuring electrical or magnetic fields, such as high-frequency alternating fields in a nuclear magnetic resonance tomography device, convert a test signal into a corresponding ultrasound signal, and transmit the ultrasound signal to a receiver, where the received signal is converted back into an electrical signal. The transmission path contains no metallic components and thus does not cause any disturbance in the field being measured.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.