Co-Investigators:
Annotation:
The noise from transportation has become one of the most important pollutant in modern cities. This rises the interest of the continuous noise monitoring using the wireless sensor networks allowing instataneous reactions (such as speed limit modification, etc.), which is in accordance with the concept of Smart Cities . Since the classical noise level meters have many disadvantages from the point of view of the use in sensor networks (price, immunity against the environmental conditions, way of control), the development of small, low-cost, remote controlled noise sensors has started recently in the previous project that is followed by this project. This project has two main parts: the theoretical and the experimental one. Since the microphones commonly used at the input of the noise level measuring systems are not well suited for long-term operation under variable outdoor conditions, the theoretical models (analytical and numerical) of miniaturized electroacoustic transducers suitable fot his purpose will be developed in the theoretical part of the project. The studied structures will be compatible with MEMS (Micro Electro-Mechanical Systems) fabrication procedures and the moving parts in form of plates and microbeams will be preferred over the usual tightened membranes. The models have to take into account the strong coupling between the acoustic pressure field inside the transducers and the displacement of the moving parts along with the dissipative effects originating in the thermal and viscous boundary layers. Publication of the models in the form of journal articles and conference proceedings is expected. In the experimental part the dovelopment of the sensor for wireless noise monitoring started during the previous project ('functional sample' 2017) will continue, the special focus will be given to the improvement of the measurement precision. Particularly the methods of autocalibration will be studied in order to compensate the change of the outdoor condition
Department:
Department of Security Technologies and Engineering
Year:
2018 - 2020
Program:
Studentská grantová soutěž ČVUT - SGS18/200/OHK2/3T/16
