Patent · US Active

System for position measuring and integrity measuring

US9803664B2 · kind B2 · utility

1Cited by

5References

11Claims

0Family size

Assignee

Techni Holding AS · NO

Inventors

David Petersen · Åsgårdstrand, NO
Jan Martin Bendiksen · Drammen, NO
Petter F. Schmedling · Moss, NO
Morten Roll Karlsen · Borre, NO
Roland Eisenträger · Arendal, NO
Audun G. Kolle · Horten, NO

Key dates

Filing date	Apr 29, 2013
Grant date	Oct 31, 2017
Priority date	—
Expiry date	Oct 19, 2033

Classification

Technology area (CPC G)Physics
CPC primaryG01N2291/044
WIPO fieldMeasurement
WIPO sectorInstruments

Abstract

A system for measuring the position of a rod element as, for example, a hydraulically or pneumatically operated piston rod. Unlike the prior art, the system according to the present invention employs a measuring principle that does not require preparatory treatment of the rod element as is required in the known solutions. The system employs direct time of flight measurements with the aid of acoustic surface waves that are introduced into the rod element. The instrument is retrofittable on existing cylinders without any modification/reconstruction thereof. An EMAT principle is employed to introduce the surface waves into the measurement in a non-contact manner.

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