Tech Briefs Magazine - May 2021 - 29
RFID-Based Rotary Position Sensor
Applications exist in aerospace, automotive, consumer goods, industrial machinery, medical
devices, military, and robotics.
Lyndon B. Johnson Space Center, Houston, Texas
I
nnovators have developed an RFIDbased system for sensing the angular
position of rotating systems. The RFIDBased Rotary Position Sensor can be
used as a position/orientation sensor
or implemented in a controller to interpolate and refine the rotation angle of
a rotating system. The sensor is part of
a suite of RFID-based technologies
developed to monitor and manage inventory based on passive RFID sensors.
NASA's RFID sensors can wirelessly
track either bulk levels or discrete
quantities of materials within a container without having to attach RFID tags to
each item.
The RFID-Based Rotary Position Sensor was designed for use in a handcrank dispenser with a circular disc
inside the dispenser box containing
RFID integrated circuits (ICs) around
the disc's periphery. An antenna is cou-
L
Wheel that turns disc
Box with loops
mounted on periphery
of disc
W
Microstrip patch
antenna, half-wave
An example steering controller with the RFID-Based Rotary Position Sensor.
pled to the crank on the outside of the
box, which allows a user to turn the
disc and dispense items. An RFID interrogator, coupled to a processor, determines the orientation of the crank
based on the RFID ICs, providing information about the rotation angle of the
internal disc that can then be used to
assess level of material remaining in
the dispenser.
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We're ready for you.
CABIN SYSTEMS
In-Flight Entertainment
Wi-Fi
Video On-Demand on Seats
Galley Equipment
Lighting Systems
AUXILIARY POWER
APU (Auxiliary Power Unit)
SGCU (Starter/Generator Control Unit)
ENGINE SYSTEMS
ECU (Engine Control Unit)
Fuel Management System
AVIONICS
IMA (Integrated Modular Avionics)
AFDX E/S (Aircraft Full Duplex End-System)
Our power and signal magnetics
support systems on the world's
elite platforms - from tip to tail.
Tech Briefs, May 2021
FLIGHT DECK
Control & Display System
Communication Navigation and Identification
Black Box
Traffic Collision Avoidance System
NAVIGATION and FLIGHT CONTROL
FCU (Flight Control Unit)
GPS
Inertial Guidance System
vwww.inrcore.com/commercial-aerospace/
Free Info at http://info.hotims.com/79413-730
Cov
ToC
29
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Tech Briefs Magazine - May 2021
Table of Contents for the Digital Edition of Tech Briefs Magazine - May 2021
Tech Briefs Magazine - May 2021 - Intro
Tech Briefs Magazine - May 2021 - Sponsor
Tech Briefs Magazine - May 2021 - Cov1
Tech Briefs Magazine - May 2021 - Cov2
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