Patent ID: 9024727
Filing Date: 2015-05-05
Classification: G01K,G06K,G08B,H01H,H01Q

Abstract:
1. A method, comprising: transmitting, by a reader device, a radio frequency (RF) signal to a tag device, wherein the tag device includes an electronic oscillator configured to generate an oscillator signal with an oscillator frequency and further includes a frequency adjuster configured to adjust the oscillator frequency with a frequency adjustment factor to provide a resulting frequency, wherein the oscillator frequency is dependent on a temperature of the tag device, and wherein the resulting frequency is based on a reference frequency provided by the RF signal; receiving, by the reader device, data from the tag device, wherein the data from the tag device comprises data indicative of the oscillator frequency; and determining, by the reader device, an estimate of the temperature of the tag device based on at least the data and a predetermined relationship between temperature and oscillator frequency.