Skip to main content
OSTI.GOVU.S. Department of Energy Office of Scientific and Technical Information
U.S. Department of Energy
Office of Scientific and Technical Information
 

Miniaturized Magnetoelastic Sensor System

Journal Article · · IEEE Sensors Journal
 [1];  [2];  [2];  [2];  [3];  [4]
  1. Lockheed Martin Aeronautics, Fort Worth, TX (United States)
  2. Y-12 National Security Complex, Oak Ridge, TN (United States)
  3. Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)
  4. Texas Tech Univ., Lubbock, TX (United States)
+ Show Author Affiliations
This article describes the design, assembly, and implementation of a hand-held, magnetic-field-based sensor system that can be adapted for a variety of sensing applications. The miniaturized system is based on Chemical Identification by Magneto-Elastic Sensing (ChIMES) technology, which uses three concentric solenoid coils to wirelessly interrogate a sensor body comprised of a response material coupled to a magnetoelastic wire. The response material expands when it encounters a target, imposing mechanical stress on the wire and altering its magnetic permeability. The sensor bodies are passive, requiring no external power source, and they are small, measuring about 15 mm in length and 3.0 mm in diameter. Up to four sensor bodies can be configured as an evenly-spaced linear array. The sensor system operates by applying a low-frequency, current-stabilized, filtered triangle wave to a uniform-density excitation coil to switch the magnetic domains within the wire. Further, the responses from the sensors are picked up by a detection coil as stress-induced changes in the Faraday voltage, and the strong magnetic field induced by the excitation coil in the detection coil is nullified by a cancellation coil reverse-wound in series with the detection coil. The responses of the sensors in an array are separated in time by a linear gradient dc biasing coil. The sensors can be interrogated through metallic and nonmetallic barriers. The signals from the detection coil and the excitation coil are digitized by a pair of bipolar analog-to-digital converters (ADCs). A Raspberry Pi single-board computer (SBC) and associated software perform data acquisition and control all aspects of the sensor system hardware. The program allows the user to select the number of sensors in the array, the type of signal that is being collected, and the number of samples to take. The program also allows for signal processing of the sensor data, such as baseline correction. The program can differentiate sensor peaks from each other and calculate the magnitude of each sensor response with less than 1% error. The data are then displayed along with a graph of the signal.
Research Organization:
Consolidated Nuclear Security, LLC, Oak Ridge, TN (United States); Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States); Oak Ridge Y-12 Plant (Y-12), Oak Ridge, TN (United States)
Sponsoring Organization:
USDOE; USDOE National Nuclear Security Administration (NNSA)
Grant/Contract Number:
AC05-00OR22725; NA0001942
OSTI ID:
2441441
Alternate ID(s):
OSTI ID: 2447235
Report Number(s):
IROS108871
Journal Information:
IEEE Sensors Journal, Journal Name: IEEE Sensors Journal Journal Issue: 10 Vol. 24; ISSN 1530-437X
Publisher:
IEEECopyright Statement
Country of Publication:
United States
Language:
English

References (5)

The radiation degradation of polytetrafluoroethylene resulting in low-molecular and functionalized perfluorinated compounds journal January 1989
Wireless chemical sensors and biosensors: A review journal August 2018
Chemical Sensor Based Upon Stress-Induced Changes in the Permeability of a Magnetoelastic Wire journal June 2017
Designer's Guide to Radiation Effects on Materials for Use on Jupiter Fly-Bys and Orbiters journal January 1979
A Passive Magnetoelastic Radiation Sensor journal November 2019

Figures / Tables (15)

Fig. 1(p. 17)figure Fig. 1
Fig. 2(p. 17)figure Fig. 2
Fig. 3(p. 18)figure Fig. 3
Fig. 4(p. 18)figure Fig. 4
Fig. 5(p. 19)figure Fig. 5
Fig. 6(p. 19)figure Fig. 6
Fig. 7(p. 20)figure Fig. 7
Fig. 8(p. 20)figure Fig. 8
Fig. 10(p. 21)figure Fig. 10
Fig. 9(p. 21)figure Fig. 9
Fig. 11(p. 22)figure Fig. 11
Fig. 12(p. 22)figure Fig. 12
Fig. 13(p. 22)figure Fig. 13
Fig. 14(p. 23)figure Fig. 14
Fig. 15(p. 23)figure Fig. 15

Similar Records

A Passive Magnetoelastic Radiation Sensor
Journal Article · Wed Nov 13 19:00:00 EST 2019 · Sensors · OSTI ID:1628561
Analysis and improvement of detection accuracy for a wireless motion sensing system using integrated coil component
Journal Article · Sat May 15 00:00:00 EDT 2010 · Journal of Applied Physics · OSTI ID:21476228

Related Subjects

46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY
coils
magnetic domains
magnetic sensors
magnetoelastic
magnetomechanical
magnetoresistive
sensor
sensor arrays
sensor systems