近程毫米波辐射计检测与数据处理
发布时间：2019-07-08 10:36
【摘要】：毫米波辐射计是一种常用的近程被动毫米波探测敏感装置,该装置是用于探测微弱毫米波辐射信号的高灵敏度接收机,特别适合于对近程金属目标的探测与识别,并广泛应用于高效灵巧弹药、被动成像和交通管制等领域。毫米波辐射计的性能检测和标定显得尤为重要。目前通常采用高塔实验或机载实验的方法,但这些实验方式均需要复杂的实验测试设施和大量的实验经费。因此,研究和设计便捷的毫米波辐射计实验测试系统,便于用户更好地进行近程毫米波辐射计实验测试十分重要。详细介绍了毫米波辐射计性能检测系统的设计组成及工作原理。针对毫米波辐射计输出信号波形特征,研究了一种改进的AdaBoost算法,通过设定阈值来修正分类错误样本的权值,最终在高噪声环境下获得较高的识别概率。详细介绍了系统中信号处理模块的硬件和软件设计。硬件设计包括整个模块的硬件工作原理,DSP芯片、A/D转换器和D/A转换器设计、电源、复位电路、JTAG电路和SCI串口通讯电路等。介绍了模块的软件设计,包括发送模块和接收模块。介绍了无线传输模块的整体框架,包括Wi-Fi芯片的选择以及无线传输模块原理。详细介绍了无线传输模块的软硬件设计,主要为Wi-Fi芯片外围电路的设计。并且用LabVIEW设计实现了无线数据采集系统,包括前面板和框图程序的设计。最后对系统进行了实验验证,实验结果表明目标识别算法能对目标进行分类识别,SD卡可以实时存储数据,示波器可以实时监测辐射计数据,并可以通过LabVIEW界面实时监测和回放实验数据。
[Abstract]:The millimeter-wave radiometer is a common short-range passive millimeter-wave detection sensitive device, which is a high-sensitivity receiver for detecting weak millimeter-wave radiation signals, is particularly suitable for detecting and identifying short-range metal targets, and is widely applied to high-efficiency and smart ammunition, and the like belongs to the field of passive imaging and traffic control and the like The performance detection and calibration of millimeter-wave radiometer are especially important. The method of high tower experiment or on-board experiment is usually used, but these experimental methods require complex experimental testing facilities and a large amount of experimental funds. Therefore, it is very important to study and design the test system of millimeter-wave radiometer, which is convenient for users to carry out the experiment of short-range millimeter-wave radiometer. The design composition and working principle of the millimeter-wave radiometer performance detection system are introduced in detail. An improved AdaBoost algorithm is developed for millimeter-wave radiometer output signal waveform characteristics. By setting the threshold, the weight of the classified error samples is corrected, and the higher recognition probability is obtained in the high-noise environment. The hardware and software design of signal processing module in the system are introduced in detail. The hardware design includes the hardware working principle of the whole module, the DSP chip, the A/ D converter and the D/ A converter design, the power supply, the reset circuit, the JTAG circuit and the SCI serial communication circuit. The software design of the module is introduced, including the sending module and the receiving module. The overall framework of the wireless transmission module, including the selection of the Wi-Fi chip and the principle of the wireless transmission module, is introduced. The hardware and software design of the wireless transmission module is introduced in detail, mainly for the design of the peripheral circuit of the Wi-Fi chip. And the design of the wireless data acquisition system, including the front panel and the block diagram program, is realized by the LabVIEW design. Finally, the experimental results show that the target recognition algorithm can classify and identify the target, and the SD card can store the data in real time. The oscilloscope can monitor the data of the radiometer in real time, and can monitor and play back the experimental data in real time through the interface of LabVIEW.
【学位授予单位】：南京理工大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TN015
本文编号：2511528
[Abstract]:The millimeter-wave radiometer is a common short-range passive millimeter-wave detection sensitive device, which is a high-sensitivity receiver for detecting weak millimeter-wave radiation signals, is particularly suitable for detecting and identifying short-range metal targets, and is widely applied to high-efficiency and smart ammunition, and the like belongs to the field of passive imaging and traffic control and the like The performance detection and calibration of millimeter-wave radiometer are especially important. The method of high tower experiment or on-board experiment is usually used, but these experimental methods require complex experimental testing facilities and a large amount of experimental funds. Therefore, it is very important to study and design the test system of millimeter-wave radiometer, which is convenient for users to carry out the experiment of short-range millimeter-wave radiometer. The design composition and working principle of the millimeter-wave radiometer performance detection system are introduced in detail. An improved AdaBoost algorithm is developed for millimeter-wave radiometer output signal waveform characteristics. By setting the threshold, the weight of the classified error samples is corrected, and the higher recognition probability is obtained in the high-noise environment. The hardware and software design of signal processing module in the system are introduced in detail. The hardware design includes the hardware working principle of the whole module, the DSP chip, the A/ D converter and the D/ A converter design, the power supply, the reset circuit, the JTAG circuit and the SCI serial communication circuit. The software design of the module is introduced, including the sending module and the receiving module. The overall framework of the wireless transmission module, including the selection of the Wi-Fi chip and the principle of the wireless transmission module, is introduced. The hardware and software design of the wireless transmission module is introduced in detail, mainly for the design of the peripheral circuit of the Wi-Fi chip. And the design of the wireless data acquisition system, including the front panel and the block diagram program, is realized by the LabVIEW design. Finally, the experimental results show that the target recognition algorithm can classify and identify the target, and the SD card can store the data in real time. The oscilloscope can monitor the data of the radiometer in real time, and can monitor and play back the experimental data in real time through the interface of LabVIEW.
【学位授予单位】：南京理工大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TN015
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