Metal sensor

US9638823B2 · kind B2 · utility

Assignee

• Robert Bosch GmbH · DE

Inventors

• Andrej Albrecht · Stuttgart, DE
• Tobias Zibold · Stuttgart, DE

Key dates

• Filing date: Oct 31, 2012
• Grant date: May 2, 2017
• Expiry date: Oct 31, 2032

Classification

• Technology area (CPC G): Physics
• CPC primary: G01V3/107
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

A metal sensor includes a primary coil arranged in a first plane, a first compensation coil arranged in a second plane, a second compensation coil arranged in a third plane, and a magnetic field sensor arranged in a fourth plane. The first plane, the second plane, the third plane and the fourth plane are oriented parallel to one another and perpendicular to a common z-direction in each case.