IMPROVING THE ACCURACY OF THERMAL CABLE MEASUREMENTS BASED ON MULTI-POINT AVERAGING OF DS18B20 SENSORS
DOI:
https://doi.org/10.53002/160Ключевые слова:
thermometric cable, DS18B20, measurement accuracy, sensor averaging, calibration, temperature monitoringАннотация
The article addresses the problem of improving temperature measurement accuracy in thermometric cables based on DS18B20 digital sensors. The specified accuracy of a single sensor is ±0.5 °C, which limits the use of standard thermal cables for applications requiring an accuracy of ±0.05 °C. The aim of the study is to substantiate the possibility of achieving this accuracy by installing several sensors at each monitored horizon followed by joint processing of their readings. A combined method is proposed, including spatial averaging of readings from 2–3 sensors, individual calibration of each sensor, and temporal filtering. Calculations show that after individual calibration with a residual systematic error of no more than 0.03 °C and spatial averaging of three sensors, the total error does not exceed 0.05 °C. The results can be used in the design of systems for long-term monitoring of soil and borehole temperatures.
Библиографические ссылки
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