Introduction

Theoretical information

Introduction

The development of professional competencies in measurement science and engineering requires a systematic understanding of the functional concepts of measurement, model constructing, identification, and interpretation of measurement data.

From educational viewpoint the practical teaching of measurement discipline should be undertaken by the design-oriented methods. This implies the use of higher level of abstraction models that deal not only with fundamental principles underlying measurement systems but also with principles of treatment of deviations and uncertainties based on the analysis of instrument structure and the effects of sensitivity to parameters variations and external influences. In many cases the models that are formed on basic physical theory and phenomena of the relevant systems should be completed by more comprehensive consideration.

Methods of development and analysis of such models are time consuming ones and require special knowledge and approaches to both mathematical modeling and the development of pedagogic materials. An example of this attitude could be sensors that include mechanical elements to sense a dynamic variable being measured. When analyzing the behavior of high-performance systems it is very important for applications to investigate properties of the system in the presence of disturbances of different physical nature, e. g. vibrations. Structural vibration problems present a major hazard and design limitation for interpretation of these systems properties and their effect on system performance. At the sizing stage of a design process models with simplifying assumptions can be applied. But when it comes to a refinement, more accurate techniques, such as models of higher order, modal analysis and optimization, consideration of the distributed dynamics effects become indispensable.

The use of new learning technologies, the introduction of computer and network base components to teaching methods are enabling tools to creating new pedagogic components by using new philosophy of collaboration and new co-working schemes, particularly, along the virtual workshop concept.

Through the setting up knowledge pools and bringing together their competence under the vision of " Virtual tools" considerable synergetic effects between the relevant partners can be realized.

Sensor systems based on capacitive or inductive measurement principles usually require sophisticated analog and digital signal processing. Particularly in automotive applications, a high degree of integration with as few external components as possible is desirable. We describe the design of an integrated angular speed sensor system based on a carrier frequency approach. To optimize the performance, we combined a synchronous

demodulation strategy with an external resonance filter serving as clock reference and noise protection. The filter was extended by an additional low-pass easing implementation of the demodulator and compensating for internal signal delays. For system simulation, a simple analytical model based on Fourier synthesis was found to be superior to a conventional SPICE simulation.