Capacitive sensor array

US8344739B2 · kind B2 · utility

Assignee

• Huf Hülsbeck & Fürst GmbH & Co. KG · DE

Inventors

• Peter Van Gastel · Solingen, DE
• Iko Lindic · Essen, DE

Key dates

• Filing date: Jul 15, 2010
• Grant date: Jan 1, 2013
• Expiry date: May 31, 2031

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B60R19/48
• WIPO field: Transport
• WIPO sector: Mechanical engineering

Abstract

A capacitive sensor array includes a sensor electrode, a shielding electrode and a background electrode which are surrounded by insulator materials and connected to a control and evaluation circuit. The sensor electrode detects the entry of an object into a space ahead of the sensor electrode. The control and evaluation circuit detects a capacity change of the sensor electrode as compared to a reference potential. The shielding electrode is connected to the sensor electrode via the control and evaluation circuit in such a manner that its potential follows. The three electrodes are arranged behind each other. The insulating materials are arrayed between the sensor electrode and the detection zone and include at least one plastic layer that directly surrounds the sensor electrode and a plastic layer.