Essays about: "MEMS"

Showing result 21 - 25 of 57 essays containing the word MEMS.

  1. 21. Development of a general acoustic model for an arbitrary surveillance camera design

    University essay from Blekinge Tekniska Högskola/Institutionen för maskinteknik

    Author : Shenyang Fei; [2018]
    Keywords : MEMS microphone; Frequency Response; Thermoviscous Losses;

    Abstract : This thesis studies how the mechanical design of a surveillance camera affects the acoustic performance, mainly in terms of the frequency response within the human hearing range. During the project, the mechanical characteristics that affect frequency response were investigated by measuring the camera’s audio behavior in an anechoic chamber. READ MORE

  3. 22. Analytical and Numerical Study of a Passive Self-Tuning Resonator

    University essay from Lunds universitet/Mekanik

    Author : Majeed al Tmizi; [2018]
    Keywords : Energy harvesting; mechanical vibrations; passive self-tuning; beam resonators; string resonators; sliding proof-mass; MEMS; actuators; Technology and Engineering;

    Abstract : Energy harvesting, from ambient vibrations, can be a very effective method for solving the problem with powering electronics were the need for constant power or regular battery replacements is a trouble or an inconvenience. But, since all energy harvesters, using mechanical vibrations, need to operate in resonance in order to generate maximal electrical output, and ambient vibrations usually do not have a constant vibration frequency, this results in the need for efficient self-tuning systems. READ MORE

  4. 23. Acoustic Analysis of Wave-Guide and MEMS Microphone in Camera Including Thermoviscous Losses

    University essay from Blekinge Tekniska Högskola

    Author : Karolis Poskus; [2018]
    Keywords : ;

    Abstract : Today Micro Electrical Mechanical Systems (MEMS) microphones are available in a range of electronic consumer products such as smart phones, tablets, smartwatches and surveillance cameras. The MEMS microphones are usually attached to a circuit board with a hole that lets sound propagate through, as well as additional wave-guides which alter the MEMS microphones original frequency response. READ MORE

  5. 24. Evaluation of IoTivity: A Middleware Architecture for the Internet of Things

    University essay from KTH/Skolan för informations- och kommunikationsteknik (ICT)

    Author : Kajsa Elfström; [2017]
    Keywords : Internet of Things; IoTivity; Middleware; Open Connectivity Foundation; Standard; Sakernas Internet; IoTivity; Mellanvara; Open Connectivity Foundation; Standard;

    Abstract : Today the Internet of Things (IoT) lacks universal standards for communication and interaction between devices. There is a wide collection of diverse software architectures for IoT applications on the market, where smart devices from different manufacturers are often unable to interact with each other. READ MORE

  6. 25. Tampering Classification Using Accelerometer Data

    University essay from Lunds universitet/Matematik LTH

    Author : Mikael Lindholm; Linus Lindgren; [2017]
    Keywords : machine learning; classification; accelerometer; support vector machine; doorstation; tampering detection; Mathematics and Statistics;

    Abstract : Network Video Door Stations are IP-based door stations for two-way communication, identification, and remote entry control. They have a number of different sensors e.g video, audio and accelerometer that can measure external data. READ MORE