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Author

Bien, Franklin
Bien’s Integrated Circuit Design Lab (BICDL)
Research Interests
  • Wireless Power Transfer(WPT), touch screen, finger print, RADAR, RF IC.

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Fabrication of a Novel Contactless Switch Using Eddy Current Displacement Sensor for Safer Vehicle Brake System

Cited 0 times inthomson ciCited 2 times inthomson ci
Title
Fabrication of a Novel Contactless Switch Using Eddy Current Displacement Sensor for Safer Vehicle Brake System
Author
Kim, Young SuChoi, Yun HoLee, Jung MinNoh, Jong SangKim, Jae JoonBien, Franklin
Keywords
Air-gaps; Automobile applications; Automotive-grade; Brake switch; Brake systems; Contact points; Contact switches; contactless; Contactless switches; Conventional brake system; Displacement sensor; Eddy current displacement sensors; Harsh environment; Input voltage ranges; Measurement results; Over current; Reliable performance; Switching speed; Vehicle brakes
Issue Date
201105
Publisher
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
Citation
IEEE TRANSACTIONS ON VEHICULAR TECHNOLOGY, v.60, no.4, pp.1485 - 1495
Abstract
Conventional brake systems using a mechanical-structure-based contact switch with a metal spring suffer from frequent malfunction problems over time caused by unstable contacts stemming from loose tension of the spring, a faulty air gap, and damage to the contact point due to overcurrent from load. In this paper, a novel contactless switch for brake systems using an eddy-current displacement sensor is proposed, fabricated, and verified to have reliable performance that overcomes conventional contact switch problems. A proposed contactless switch was fabricated using automotive-grade surface-mount devices (SMDs) on both sides of an FR-4 printed circuit board for low-cost implementation. The measurement result shows a switching speed of less than 49.7 mu s, on average, which is approximately ten times faster than conventional mechanical-structure-based contact switches. The overall dimension of the proposed switch is 36 mm x 26 mm x 64 mm, which can fit into most brake switch housings. The operating input voltage range is from +8 V to +22 V, with the temperature ranging from -40 degrees C to +85 degrees C, showing reliable performance under harsh environment test for automobile applications.
URI
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DOI
http://dx.doi.org/10.1109/TVT.2011.2128898
ISSN
0018-9545
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