RFID Fall Detection Floor Mat System - PowerPoint PPT Presentation

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Title:

RFID Fall Detection Floor Mat System

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Power Output: 1 Watt. Output Impedance: 50 ohms. Floor Mat. Built with hard tapered edges ... Option 1: Single-loop antenna approximately the area of the floor mat ... – PowerPoint PPT presentation

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Title: RFID Fall Detection Floor Mat System


1
RFID Fall Detection Floor Mat System
  • Andrew Heidt
  • Brian Tippins
  • Coleman McDaniel
  • Zach Brannan
  • Abdirizak Mire

2
System Overview
  • Detects patient falls using an RFID wrist tag and
    an antenna embedded in a floor mat
  • Is used in hospitals and elderly care facilities,
    where falls are common
  • Will cost 3,500 per unit

3
Design Objectives
  • Detect patient falls and egress
  • lt 5 detection failures
  • Notify staff of incidents
  • Record incidents in logfile

4
System Diagram
5
RFID Reader
  • Feig OBID i-Scan MR101-A
  • Operating Frequency 13.56 MHz
  • Power Output 1 Watt
  • Output Impedance 50 ohms

6
Floor Mat
  • Built with hard tapered edges
  • Contains antenna structure
  • Placed at patient bedside

48
3
30
7
Antenna
  • Copper foil antenna
  • Resonant at 13.56MHz
  • Matched to 50 ohm reader

8
Antenna Design Options
  • Option 1 Single-loop antenna approximately the
    area of the floor mat
  • Option 2 Two antennas multiplexed

Single-loop
Multiplexed
9
Impedance Simulations (HFSS) Comparing
Single-loop and Multiplexed designs
Single-loop
Multiplexed
L Z/(j?)1.81 µH
L Z/(j?)1.26 µH
10
Magnetic Field Simulations (HFSS) Comparing
Single-loop and Multiplexed Designs
Multiplexed
Single-loop
11
Summary of Antenna Design Options
12
Computer Interface Process Flow
13
Interfacing with Hospital Network
  • Patient PC
  • Logs incidents
  • Displays fall alerts
  • Transmits alerts to nurse station
  • Nurse Station
  • Displays fall alerts
  • Adds/Removes patient information

14
VB Computer Implementation
  • Patient PC functions
  • Listener() listens on serial port for tag
    detections
  • File_Logger() logs detection incident with
    date/time in local file
  • Transmit() forwards detection incidents and
    listen resets to the nurse station
  • Alert() displays alert window on PC

15
VB Computer Implementation
  • Nurse Station
  • Add(), Remove() add and remove patients from
    the monitoring system
  • Edit() edit patient information (name, room
    number, tag number etc.)
  • Ignore() stops alerts for a specific patient
  • Alert() displays alert window with incident and
    patient information

16
GUIs
  • Nurse Station
  • Patient PC

17
Costs
  • Expected Costs Updated Costs



- We no longer anticipate the use of a
multiplexer in the design - Estimated Cost
18
Timeline
19
Patient falls cost the health care industry 19.4
billion in each year
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