超聲波室內(nèi)定位導(dǎo)航裝置的設(shè)計(jì)與實(shí)現(xiàn)
[Abstract]:In recent years, with the gradual improvement and maturity of outdoor positioning system, the development of indoor positioning system appears to be a bit backward, but the demand is increasing, such as in large shopping malls. People tend to get the location information and the navigation information of the target point in the multi-compartment underground parking lot and so on. Therefore, it is necessary to develop a kind of positioning and navigation device with high precision and low cost. In this paper, the existing system needs to use radio frequency communication, at least three base stations are needed to achieve positioning, and the algorithm is more complex and so on. More research is devoted to the communication based on ultrasonic itself, the simplification of algorithm and the optimization of base station. In this paper, the research status of outdoor indoor positioning system is analyzed in depth, and the reasons for the low conversion capacity of indoor positioning device are found, according to the main contradiction, the overall development and design of the device are carried out. The localization algorithm mainly optimizes and upgrades the contactless triangulation algorithm, that is, the two-side localization algorithm is adopted to reduce the complexity and execution time of the algorithm without affecting the precision, so as to optimize the operation of the whole device. Then the ultrasonic communication is described in detail. In addition to realizing the ultrasonic ranging function, the communication function is also loaded into the ultrasonic wave by the design of spread spectrum, coding, modulation and demodulation, which does not occupy other radio frequency band resources. At the same time, the execution cost of the device is greatly reduced, and the transmutability of the device is improved. In the installation of base station, the cross spot laser transmitter is used for the first time to determine the reference origin during the device initialization and to help correct the whole device. At the same time, it can be used to locate and navigate through two base stations, while in the traditional positioning device, Base station or node points need at least three, cost savings, improve the accuracy. Finally, after the hardware design and software platform are determined, the ultrasonic positioning and navigation device based on STM32F407ZGT6 microcontroller is built through the combination of theory and practice, and the functions of the device are tested. The positioning and navigation error can be controlled within the range of 5cm, and the absolute value of the error is mostly concentrated in the area of 1.6-3.8cm. After analyzing the causes of the error, an improved way to further reduce the error is put forward, and the function of the device is relatively perfect. High accuracy.
【學(xué)位授予單位】:哈爾濱理工大學(xué)
【學(xué)位級(jí)別】:碩士
【學(xué)位授予年份】:2017
【分類(lèi)號(hào)】:TB559
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1 本報(bào)記者 馬靜t,
本文編號(hào):2131733
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