基于ARM的方位判定系統(tǒng)研究與設(shè)計(jì)
[Abstract]:The azimuth determination system uses sound signal to locate the target and determines the position of the target by correlation calculation. The existing sound positioning technology has some shortcomings such as poor real-time, low positioning precision and easy to be affected by reverberation. In order to solve these problems, a azimuth determination system based on ARM is designed in this paper, with emphasis on hardware circuit design and software design. The research contents and research results mainly include the following aspects: 1. Based on the analysis and study of azimuth determination method, the overall design scheme of azimuth determination system is put forward. According to the requirement of sound signal quality and operation quantity, electret microphone and planar microphone array are selected. The existing azimuth determination methods are compared and analyzed, and the appropriate azimuth determination algorithm is selected. In this system, the generalized cross-correlation time delay estimation algorithm is chosen. The plane quaternion microphone array used in the system is described by the algorithm model and the calculation formula of the target position is deduced, and the azimuth determination algorithm is improved. According to the requirements of the system, the STM32F103RBT6 microprocessor is used to complete the data processing and calculation, and LCD1602 is used as the liquid crystal display device. In the aspect of hardware circuit design, this paper adopts low power design. Mainly includes processor peripheral module design, signal processing module design, LCD module design, power module design. 3. Software design, this paper uses Real View MDK development tools, and the use of STM32 standard peripheral library function. System initialization, main program design, LCD program design and azimuth determination algorithm are implemented. After the hardware and software design of the system is completed, the welding of the hardware circuit board and the debugging of the hardware and software are carried out. The system is tested in a relatively stable indoor environment, and the error of the measurement results is analyzed. The results of many experiments show that the azimuth determination system based on ARM can run normally, the positioning error is within 4%, and it can meet the requirements of azimuth determination for different frequency sound signals, and the real-time performance is good. It has high use value.
【學(xué)位授予單位】:西安科技大學(xué)
【學(xué)位級別】:碩士
【學(xué)位授予年份】:2016
【分類號】:TN641;TP311.52
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