MATTHEW WILCOX PRICE
Pilots at Copperwood Ct, Rockville, MD
License number
Maryland A2560203
Issued Date
May 2015
Expiration Date
May 2017
Category
Airmen
Type
Authorized Aircraft Instructor
Address
Address
7113 Copperwood Ct, Rockville, MD 20855
Professional information
Wireless Remote Passive Temperature Sensor For Monitoring Food
US Patent:
2009014, Jun 11, 2009
Filed:
Dec 8, 2008
Appl. No.:
12/314283
Inventors:
William Joseph Schafer - Rockville MD, US
Matthew Price - Derwood MD, US
Matthew Price - Derwood MD, US
Assignee:
WT Systems, LLC - Rockville MD
International Classification:
G01K 7/34
US Classification:
374183, 374E07037
Abstract:
A passive wireless temperature sensor with a loop antenna is placed in a remote environment for exposure to its changing temperature conditions. The sensor includes a coil of wire wrapped around a cylinder to form an air-core inductor. The cylinder contains a small amount of eutectic material similar to a conventional thermometer which has the property of being magnetic. A capacitor is connected to the coil of wire to form a resonant LC “tank” circuit. As temperature increases, the eutectic material expands through the cylinder at the core of the inductor causing an increase in inductance and corresponding decrease in the resonant frequency of the LC “tank” circuit. The temperature of the remote sensor is proportional to resonant frequency and can be determined by generating an oscillating signal and measuring resonant frequency of the remote sensor.