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A Novel Design Of An NTC Thermistor Linearization Circuit

100%

Lukić J. , Denić D.

Metrology and Measurement Systems

2015

tom Vol. 22, nr 3

351--362

A novel design of a circuit used for NTC thermistor linearization is proposed. The novelty of the proposed design consists in a specific combination of two linearization circuits, a serial-parallel resistive voltage divider and a two-stage piecewise linear analog-to-digital converter. At the output of the first linearization circuit the quasi-linear voltage is obtained. To remove the residual voltage nonlinearity, the second linearization circuit, i.e., a two-stage piecewise linear analog-to-digital converter is employed. This circuit is composed of two flash analog-to-digital converters. The first analog-to-digital converter is piecewise linear and it is actually performing the linearization, while the second analog-to-digital converter is linear and it is performing the reduction of the quantization error introduced by the first converter. After the linearization is performed, the maximal absolute value of a difference between the measured and real temperatures is 0.014°C for the temperature range between - 25 and 75°C, and 0.001°C for the temperature range between 10 and 40°C.

High-Reliable Position Encoder for Crane Positioning and Crane Displacement Problem Solving

80%

Denić D. , Pesić M. , Arsić M.

Machine Dynamics Problems

2005

tom Vol. 29, No. 2

35-44

A one-dimensional position measurement using pseudorandom encoding is discussed. An application in crane position measurement is described. This solution simultaneously provides high standards in solving the crane displacement problem. The solution is based on the application of developed hybrid pseudorandom linear encoder, which provides a frequent autocalibration of the measurement system in a simple manner. On the basis of the experimental results of the developed encoder functioning, the discussion about the possibility of its application for crane positioning, as well as the concrete possibility of the proposed solution are given. The discussion about the possibility of this solution to solve the crane displacement problem also is given.