Automatic adjustment of the parameters of the temperature measurement algorithm in a wide range.
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| Title: | Automatic adjustment of the parameters of the temperature measurement algorithm in a wide range. |
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| Authors: | Bondar, O. G.1 (AUTHOR) b.og@mail.ru, Brezhneva, E. O.1 (AUTHOR), Botikov, K. A.1 (AUTHOR) |
| Source: | Measurement Techniques. Jul2024, Vol. 67 Issue 4, p308-317. 10p. |
| Subjects: | Measurement errors, Resistance thermometers, Temperature measurements, Temperature sensors, Time measurements |
| Abstract: | The improvement of temperature measurement accuracy using air monitoring systems at various sites, including hazardous industries, is considered. Specifics of such systems include a significant distance between the measuring device and the temperature sensors, such as resistance thermometers, which are widely used in the environmental parameter collection and control systems. It is shown that the main source of temperature measurement errors when connecting sensors remotely is the resistance of the connecting lines, determined by their length. The main methods for reducing measurement errors caused by the effect of resistance of the sensor connection line on the temperature measurement results are analyzed. The advantages of two-wire circuits in comparison with three- and four-wire circuits are formulated. A two-wire temperature measurement method with an integrating converter, implemented based on a device with a built-in microcontroller, is described. By using this method, it becomes possible to reduce measurement time, implement jamming and quantization noise avoidance, and consequently, reduce the temperature measurement error compared to similar two-wire measurement methods. An alternative two-wire temperature measurement method with automatic adjustment of the measurement algorithm parameters is proposed, aimed at increasing measurement accuracy by mitigating the effect of the time constant. The optimal time for the first integration step was found. Experimental studies and evaluation calculations were conducted to confirm the effectiveness of the proposed solution. When the temperature sensor resistance varies from 1 to 4 kOhm, the coefficient of variation constitutes ± 0.06%, while the variation interval of the relative resistance measurement error with automatic adjustment within the specified range has decreased by more than four times. The experimental results suggest the possibility of applying the proposed method in control and regulation systems with remote temperature sensor connections. [ABSTRACT FROM AUTHOR] |
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| Database: | Engineering Source |
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| Abstract: | The improvement of temperature measurement accuracy using air monitoring systems at various sites, including hazardous industries, is considered. Specifics of such systems include a significant distance between the measuring device and the temperature sensors, such as resistance thermometers, which are widely used in the environmental parameter collection and control systems. It is shown that the main source of temperature measurement errors when connecting sensors remotely is the resistance of the connecting lines, determined by their length. The main methods for reducing measurement errors caused by the effect of resistance of the sensor connection line on the temperature measurement results are analyzed. The advantages of two-wire circuits in comparison with three- and four-wire circuits are formulated. A two-wire temperature measurement method with an integrating converter, implemented based on a device with a built-in microcontroller, is described. By using this method, it becomes possible to reduce measurement time, implement jamming and quantization noise avoidance, and consequently, reduce the temperature measurement error compared to similar two-wire measurement methods. An alternative two-wire temperature measurement method with automatic adjustment of the measurement algorithm parameters is proposed, aimed at increasing measurement accuracy by mitigating the effect of the time constant. The optimal time for the first integration step was found. Experimental studies and evaluation calculations were conducted to confirm the effectiveness of the proposed solution. When the temperature sensor resistance varies from 1 to 4 kOhm, the coefficient of variation constitutes ± 0.06%, while the variation interval of the relative resistance measurement error with automatic adjustment within the specified range has decreased by more than four times. The experimental results suggest the possibility of applying the proposed method in control and regulation systems with remote temperature sensor connections. [ABSTRACT FROM AUTHOR] |
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| ISSN: | 05431972 |
| DOI: | 10.1007/s11018-024-02349-3 |
