Patent · US Expired

Process for the capacitive object detection in the case of vehicles

US6577142B2 · kind B2 · utility

9Cited by

7References

8Claims

0Family size

Assignee

Bayerische Motoren Werke Aktiengesellschaft · DE

Inventors

Lutz Eisenmann · Reichenbach/Oberlausitz, DE
Yan Lu · Beijing, CN
Sivart Sauer · Munich, DE
Christian Marschner · Munich, DE

Key dates

Filing date	Mar 2, 2001
Grant date	Jun 10, 2003
Priority date	—
Expiry date	Mar 2, 2021

Classification

Technology area (CPC B)Performing Operations; Transporting
CPC primaryB60N2220/20
WIPO fieldTransport
WIPO sectorMechanical engineering

Abstract

In a process for capacitive object detection in a vehicle seat, capacitors arranged in the backrest and in the seat surface are influenced by an object. The capacitors are acted upon by alternating voltage, and the time variation of their capacitances is determined individually. From the values of each of the two capacitances, an evaluation of the object is derived by means of a value table and, when the two evaluations correspond to one another concerning the type of an object, an occupant protection system assigned to the seat is correspondingly activated.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.