1D ultrasonic transducer unit for material detection

US11906293B2 · kind B2 · utility

Assignee

• Pepperl+Fuchs SE · DE

Inventors

• Regine Augenstein · Mannheim, DE
• Thomas Kaindl · Dossenheim, DE

Key dates

• Filing date: Feb 3, 2021
• Grant date: Feb 20, 2024
• Expiry date: Apr 22, 2041

Classification

• Technology area (CPC G): Physics
• CPC primary: G01S7/521
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

A 1D ultrasonic transducer unit for material detection, comprising a housing having securing device for securing to a surface and having at least three discrete ultrasonic transducers designed to decouple sound waves with a consistent operating frequency between 20 kHz and 400 kHz in a gaseous medium, and a control unit designed to control each ultrasonic transducer individually, wherein two ultrasonic transducers, directly adjacent to one another, are spaced apart by a distance, the 1D ultrasonic transducer unit has a sound channel per ultrasonic transducer with an input opening, associated with exactly one respective ultrasonic transducer, and an output opening, the output openings are arranged along a straight line, a distance from the directly adjacent output opening corresponds at most to the full or half the wavelength in the gaseous medium and is smaller than the corresponding distance.