New approach to the accuracy description of unbalanced bridge circuits with the example of pt sensor resistance bridges

• Autorzy: Warsza Z. L.
• Języki publikacji: EN

Abstrakty

EN

After short introduction transfer coefficients of the unloaded four arms bridge of arbitrary variable arm resistances, supplied by current or voltage source, are given in Table 1. Their error propagation formulas are find and two rationalized forms of accuracy measures, i.e. related to the initial bridge sensitivities and of double component form as sum of zero error and increment error of the bridge transfer coefficients are introduced. Both forms of transfer coefficient measures of commonly used bridge - of similar initial arm resistances in balance and different variants of their jointed increments, are given in Table 3. As the example limited errors of some resistance bridges with platinum Pt100 industrial sensors of class A and B are calculated Table 4 and analyzed. Presented approach is discussed and found as the universal solution for all bridges and also for any other circuits used for parametric sensors.

Słowa kluczowe

EN

resistance bridge; sensor; measures of accuracy; error; uncertainty of measurements

• Wydawca: Łukasiewicz Industrial Research Institute for Automation and Measurements PIAP
• Czasopismo: Journal of Automation Mobile Robotics and Intelligent Systems
• Rocznik: 2010
• Tom: Vol. 4, No. 2
• Strony: 8--15
• Opis fizyczny: Bibliogr. 10 poz., rys.

Twórcy

autor

Warsza Z. L.

• Polish Metrological Society, Warsaw, Poland,

Bibliografia

• [1] Warsza Z. L., “Four-Terminal (4T) Immittance Circuits in Multivariable Measurements” (Immitancyjne układy czterobiegunowe (4T) w pomiarach wieloparametrowych), Monograph of Industrial Institute of Control and Measurement PIAP, Warszawa 2004 (in Polish).
• [2] Sydenham P.H., Thorn R. (eds.), Handbook of Measuring System Design, Chapters: 126: “Electrical Bridge Circuits Basic Information” and 127 “Unbalanced DC bridges” by Warsza Z. L., John Wiley & Sons, Ltd. New York 2005, pp. 867-889.
• [3] Warsza Z. L., “Two Parameter (2D) Measurements in Four Terminal (4T) Impedance Bridges as the New Tool for Signal Conditioning”. Part 1 and 2. In: Proc. of the 14th International Symposium on New Technologies in Measurement and Instrumentation and 10 Workshop on ADC Modeling and Testing IMEKO TC-4, Gdynia/Jurata, 2005, pp. 31-42.
• [4] Warsza Z. L., “Two Parameter (2D) Measurements in Double-current Supply Four-terminal Resistance Circuits”, Metrology and Measurement Systems, vol. 13, no 1, 2006, pp. 49-65.
• [5] Warsza Z. L., “Backgrounds of two variable (2D) measurements of resistance increments by bridge cascade circuit”. In: Proc. of SPIE Photonic Applications...,Wilga Symposium, Poland, vol. 6347, ed. Romaniuk R. S., 2006, pp. 634722R-1-10.
• [6] Warsza Z.L., “Accuracy Measures of the Four Arm Bridge of Broadly Variable Resistances, Parts 1 and 2”. In: Proceedings of 15 IMEKO TC4 International Symposium on Novelties in Electrical Measurement and Instrumentations, TU Iasi , Romania, vol. 1, Sept. 2007, pp. 17-28.
• [7] Warsza Z.L., “Miary dokładności transmitancji mostka rezystancyjnego w przypadkach szczególnych” (Accuracy measures of transmittance of variable resistance bridge in particular cases), Pomiary Automatyka Kontrola, no. 10, 2007, pp. 17 -24 (in Polish).
• [8] Warsza Z.L., „Nowe ujęcie opisu dokładności mostka z przemysłowymi czujnikami Pt” (New Approach of the Accuracy of Industrial Pt Sensor's Bridge), Podstawowe Problemy Metrologii PPM'08, Prace Komisji Metrologii Oddziału PAN w Katowicach, Konferencje, no. 8, pp. 155-164 (in Polish).
• [9] Kreuzer M., “Linearity and Sensitivity Error in the Use of Single Strain Gages with Voltage-Fed and Current-Fed Circuits”, Experimental Techniques, vol. 8, October 1984, pp. 30-35.
• [10] Kreuzer M., “Whestone Bridge Circuits shows almost no Nonlinearity and Sensitivity Errors when used for Single Strain Gage Measurements”, Technical literature of Hottinger Baldwin Messtechnik, in Internet: ta_sg_kreuzer_06 2004.