Integrated torque and angle sensor for steering column monitoring with improved performance

US11543311B2 · kind B2 · utility

Assignee

• Robert Bosch GmbH · DE

Inventors

• Adrian Kussmann · Reutlingen, DE
• Andreas Kurz · Oberursel, DE
• Christoph Ossmann · Reutlingen, DE
• Guotao Chen · 安丰镇, CN
• Michael Kleinknecht · Lehrensteinsfeld, DE
• Mirko Scheer · 安丰镇, CN
• Rolando Doelling · Hechingen, DE
• Sina Fella · Neuenstadt am Kocher, DE

Key dates

• Filing date: Jan 17, 2020
• Grant date: Jan 3, 2023
• Expiry date: May 23, 2040

Classification

• Technology area (CPC G): Physics
• CPC primary: G01B7/30
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

A sensor for at least detecting steering torque of a steel steering column includes a magnetic field generating element which is configured to generate a magnetic field. The magnetic field penetrates the steering column so as to magnetize a steel material thereof. The sensor also includes a magnetic field detection element which is configured to detect a magnetic field change caused by a magnetoelastic effect of the magnetized steel material of the steering column when the steering column is subjected to torque stress. An output signal of the magnetic field detection element characterizes steering torque. The sensor also includes a base plate bearing the magnetic field generating element and the magnetic field detection element. The base plate is spaced from and separate from the steel steering column. The magnetic field generating element and the magnetic field detection element are directly mounted on the base plate.