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System for sensing whether an object struck in a collision is a pedestrian

  • US 6,744,354 B2
  • Filed: 09/23/2002
  • Issued: 06/01/2004
  • Est. Priority Date: 09/23/2002
  • Status: Expired due to Term
First Claim
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1. A sensing system for determining the width of an object in the event of an impact force being applied thereto, comprising:

  • a strip having first and second portions that are spaced apart, a conductive electrode being attached to the first portion and a resistive electrode being attached to the second portion;

    a voltage source is connected to the resistive electrode that provides a constant current through the resistive electrode, wherein upon impact the conductive electrode contacts the resistive electrode and shorts out the portion of the resistive electrode that is contacted by the conductive electrode decreasing the resistance of the resistive electrode which decreases the voltage developed; and

    wherein the resistive electrode is formed as a first part that increases in resistivity from right to left and a second part that increases in resistivity from left to right, wherein the first and second parts are positioned adjacent to one another and the conductive electrode contacts both of the first and second parts in an impact shorting the first and second parts, wherein by comparing the voltages developed in each part the width and location of the impact is determined.

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