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A simple glass breakage detector using the MSP430

Posted: 04 May 2007 ?? ?Print Version ?Bookmark and Share

Keywords:glass breakage detector? MSP430F2274 MCU detector? LWDF glass breakage?

This application report describes a simple glass breakage detector using the MSP430F2274 ultralow-power MCU. The algorithm is based on the spectral analysis of a typical glass breakage signal. The input signal spectrum, limited to a frequency of 20kHz, is processed for a valid glass breakage. Various signal characteristics such as peak content, number of zero crossings, and frequency composition are analyzed. Real-time signal processing is achieved by implementing and using a low-order bireciprocal lattice wave digital filter (LWDF). A glass breakage alert is indicated by an onboard buzzer and an LED. The entire setup is designed to operate at low power, allowing long battery life.

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Related Datasheets
Part Number Description Category
? MSP430F2274 MSP430F22x2, MSP430F22x4 Mixed Signal Microcontroller (Rev. B) EDA - IC Design

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