Study on high-performance temperature meter using quartz tuning-fork temperature sensor

The fundamental principle of high-performance temperature meter with quartz tuning-fork temperature sensor (QFTS) is studied. Research demonstrates that the quartz tuning-fork temperature sensor is high resolution and long-term stability, which is less frequent recalibration. The frequency format of the information is inherently digital, since counting is a digital operation, with the elimination of analog-to-digital conversion, these quartz resonator sensors can transmit their inherent sensor performance undiminished by the intermediate circuitry. The theory of equal-precision digital frequency measure and best-fitting method are used for the temperature transducer to design its hardware and software, its for use from -40/spl deg/C to 110/spl deg/C with accuracies of 0.1/spl deg/C and with a resolution of 0.005/spl deg/C for 2-s response time.