Patent ID: 8558558
Filing Date: 2013-10-15
Classification: B60R,E05Y

Abstract:
1. A detection system comprising: a modulator for generating an alternating voltage; a field-forming electrode structure that is coupled with an output of the modulator for the purpose of generating a spatially extended excitation field; a detector having a detection electrode structure to detect a field-electrical effect within a detection area extending along the detection electrode structure; a first shield electrode arranged in proximity to said field forming , electrode structure; a second shield electrode arranged in proximity to said detection electrode structure; wherein said first and second shield electrodes are coupled with said output of the modulator and wherein a signal fed to said second shield electrode is configured to be attenuated with respect to a signal fed to said first shield electrode; wherein the field-forming structure and the detection electrode structure are provided near each other, and the detection electrode structure and field-forming structure are shielded by said first and second shield electrode from each other such that when the excitation field and the detection area are bridged by an object to be detected, a voltage event that can be classified as indicating a presence is induced in the detection electrode structure.