Title page for ETD etd-12192011-134916

Type of Document Master's Thesis
Author Kandel, Matthew Kreisman
Author's Email Address mkandel@vt.edu
URN etd-12192011-134916
Title Design of a System to Monitor Youth Workers’ Heat Stress and Positioning using Non-invasive Techniques
Degree Master of Science
Department Mechanical Engineering
Advisory Committee
Advisor Name Title
Diller, Thomas E. Committee Co-Chair
Grisso, Robert D. Jr. Committee Co-Chair
Wicks, Alfred L. Committee Member
  • handheld device
  • ZigBee
  • XBee
  • sensor development
  • heat exhaustion
  • proximity
  • health
Date of Defense 2011-12-07
Availability unrestricted
Due to inadequate training and an undeveloped ability to recognize dangerous scenarios, youth workers are exposed to many dangers in the agriculture and lawn care industries. With the abundance of new technologies available on the market, a project was devised to prevent youth from heat exhaustion and equipment run overs by employing sensor based technologies. Using aural temperature measurement techniques involving a thermistor and thermopile, an accurate estimation of core body temperature can be made. The measurements performed by the devices are recorded and transmitted wirelessly over a ZigBee network using XBee radiofrequency modules. Utilizing the properties of radiofrequency transmission, the Received Signal Strength Indication (RSSI) is used to approximate the distance between devices. With accuracy comparable to GPS methods and no necessity for line of sight to sky, RSSI supplies a more than adequate estimate for proximity distance. The temperature and RSSI values are then sent to a coordinating modem where the data is displayed for the supervisor. After testing and calibrating the device, it was found that these methods are effective for the monitoring of core body temperature and proximity of workers. The temperature sensor was able to measure temperatures with less than 0.25% error and the proximity sensor was able to estimate distance within 1.25 meters at close range.
  Filename       Size       Approximate Download Time (Hours:Minutes:Seconds) 
 28.8 Modem   56K Modem   ISDN (64 Kb)   ISDN (128 Kb)   Higher-speed Access 
  Kandel_MK_T_2011.pdf 2.21 Mb 00:10:14 00:05:15 00:04:36 00:02:18 00:00:11
  Kandel_MK_T_2011_Copyright.pdf 142.25 Kb 00:00:39 00:00:20 00:00:17 00:00:08 < 00:00:01

Browse All Available ETDs by ( Author | Department )

dla home
etds imagebase journals news ereserve special collections
virgnia tech home contact dla university libraries

If you have questions or technical problems, please Contact DLA.