System and method for detecting a thickness of a layer

US11592380B2 · kind B2 · utility

Assignee

• Robert Bosch GmbH · DE

Inventors

• Christian Peters · Mountain View, US
• Beatrix Mensch · Illertissen, DE
• Thomas Rocznik · Mountain View, US
• Seow Yuen Yee · Mountain View, US

Key dates

• Filing date: Dec 17, 2018
• Grant date: Feb 28, 2023
• Expiry date: Dec 17, 2038

Classification

• Technology area (CPC A): Human Necessities
• CPC primary: A61B5/442
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

A thickness analyzer unit for determining a thickness of a layer includes a temperature change device, a temperature sensor, a memory, and a controller. The temperature change device is configured to induce a temperature change of the layer from a first temperature value to a second temperature value. The temperature sensor is configured to generate first temperature data corresponding to the first temperature value and second temperature data corresponding to the second temperature value. The memory is configured to store the first and second temperature values, a thermal conductivity value, a specific thermal capacity value, and a density value. The controller is configured (i) to determine a time constant value of the layer based on the first and second temperature values, and (ii) to determine the thickness of the layer based on the time constant value, the thermal conductivity value, the specific thermal capacity value, and the density value.