The Design of Anemometric Sensor System for Measurement of Wind Velocity and Direction with Integrated Measure Probe

Abstract:- An anemometric measuring probe has been designed. The probe is composed of 4 temperature sensors. Each sensor contains 9 NMOS transistors. The transistors work in the mode of strong inversion (overthreshold area). Pair temperature sensors are mutually turned by 90º. Each pair measures the difference of temperatures given by flow velocity in specified direction. The resulting direction of flow is calculated from the data of perpendicular pair sensors using goniometric functions. The differential temperatures are represented by differential output voltage from the sensors processed by differential amplifiers. The computation of angles is performed in digital part. WinSPICE and MATLAB have been used for design and simulation. Models have been used for design and modelling. There are described the principle of the selected method, design of two-dimensional configuration of measuring probe, designed and realised model of the sensor system. The models are used on different system levels. Basic level is consisting of model on material and structure levels. Circuit and system models follow. The top of the model hierarchy is represented by models with logic functions. Modelling of the mechanical and thermal distribution is included in the models system, software CoventorWare is used for simulations. The CADENCE design framework is used for designing of integrated system including the evaluation circuits. The reached results are mentioned at the conclusion