Method for temperature measurement
A technology for temperature measurement and temperature measurement, which is applied to thermometers, measuring devices, and heat measurement. It can solve the problems of high cost and limited production quantity, and achieve the effect of increasing power consumption and realizing simple principles.
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[0024] Next, principles and examples in accordance with the present invention are discussed more thoroughly.
[0025] according to figure 1 , the temperature affects the frequency of the on-chip oscillator of the RFID tag 1 . The tag 1 is read by an RFID reading device 2 . The frequency of the Tag 1 local oscillator is determined by a method described in detail later in this document. The protocol is intentionally made insensitive to this frequency change. Using suitable methods, the tag clock frequency can be determined. Labeling frequency is proportional to temperature.
[0026] according to Figure 6 a and 6b, in order to remove the largest noise and unknown parameters, the temperature is stepped up or down.
[0027] Assume the following scenario:
[0028] The internal oscillator of a UHF (Ultra High Frequency) tag is usually based on a ring oscillator
[0029] The frequency of the ring oscillator is proportional to the label temperature
[0030] The dependence of ...
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