Abstract
The system is based on ARM as the core of the embedded platform, using STM32F103 chip, comprehensively designing adjustable gain microphone, AD7606 eight channel synchronous acquisition chip,W5300 Ethernet chip, Qt upper computer and so on to complete a multi-channel sound source localization system integrating acquisition, storage, upload, analysis and display of sound signals. The system use STM32F103 chip to control the core and source localization algorithm based on time delay estimation of arrival time difference with small computation, accurate localization and good real-time performance. Through the design and fabrication of microphone array, the acquisition and pre-processing function of sound signal is accomplished by using eight-channel synchronous acquisition module. The data is transmitted to the upper computer by using Ethernet module, and the upper computer performs algorithm processing and display. The system is simple in structure, small in size and easy to use. The test results show that the system can not only acquire complete sound data and high waveform reduction, but also display real-time sound source waveform in the upper computer. The positioning result is ideal, high accuracy, good real-time, and has certain practical value.
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