Projects:2015s1-28 Wireless Rotation Detector

From Projects
Revision as of 17:47, 17 August 2015 by A1615563 (talk | contribs)
Jump to: navigation, search

Supervisors

Honours students


Project objects

Scope

  • Design and construct a portable wireless device which can accurately measure the speed of rotating object.

Specific Aims

  • Design and produce a metamaterial absorber with resonate frequency of 2.4GHz.
  • Design and fabricate a planar dual-antenna which can transmit and receive signals with limited crosstalk.
  • Design a software system which can calculate the rotation speed.

Background & Significance

  • Rotation speed measurement devices widely used in industries.
  • Current popular rotation speed measurement devices, such as laser tachometer, use visible light.
  • Can not use if line of sight blocked.
  • Intend to change – use Electromagnetic Wave instead
Fig. 1: Background & significance


Key Requirements

  • Metamaterial Absorber shall absorb at least 90% (-10db) power at 2.4GHz when it has same polarization with antenna.
  • Dual antennas shall work at 2.4GHz and the crosstalk between 2 antennas shall be less than -40dB.
  • Portable system shall be operational up to 50cm from the rotating object.
  • Portable system shall accurately measure the rotating object in both low and high speed.

Proposed Approaches

  • Method exploited - ‘Divide-And-Conquer’.
  • The entire project can be decomposed into several aspects.
    • Hardware (design required)
      • Metamaterial Absorber
      • Dual-Antennas