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2 International Journal of Electronics and Telecommunications

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Experimentally test bench for Tire Pressure Monitoring System : discussion of measurement and communication issues

100%

Gryś S.

International Journal of Electronics and Telecommunications

2019

tom Vol. 65, No. 1

51--56

This paper presents a method of wireless measurement of pressure and temperature of air in a car wheel with Tire Pressure Monitoring System - one of the modern safety systems used in the automotive industry. The readings were performed on a specially designed test bench. It was described a construction and operating principle of key elements of this test bench allowing work with sensors, TPMS module, reference instruments, and the format of data and correctness of data transmission between TPMS and host computer. The created software for embedded system emulating real on-board computer let to observe the uncorrected sensor readings and the effect of calibration in two points of characteristic.

Discretization Method of Continuous-Time Dynamic Linear Model

63%

Gryś S. , Minkina W.

International Journal of Electronics and Telecommunications

2023

tom Vol. 69, No. 2

281--286

The article presents a new discretization method of a continuous-time linear model of sensor dynamics. It can be useful to reduce measuring errors related to the inertia of the sensor. For example it is important in the measurement of rapid processes as temperature changes in combustion chambers, or for shortening the time needed to establish the sensor readings in a transition state. There is assumed that sensor dynamics can be approximated by linear differential equation or transfer function. The searched coefficients of equivalent difference equation or discrete transfer function are obtained from Taylor expansion of a sensor output signal and then on the solution of the linear set of equations. The method does not require decomposition of sensor transfer function for zeros and poles and can be applied to the case of transfer function with zeros equal to zero. The method was used to compensate the dynamics of sensor measuring fast signals. The Bode characteristics of a compensator were compared with others derived using classical methods of discretization of linear models. Additionally, signals in time were presented to show the dynamic error before and after compensation.