發(fā)布時(shí)間：2018-03-07 16:12

  本文選題：射頻功率計(jì)　切入點(diǎn)：有效值功率　出處：《西安科技大學(xué)》2012年碩士論文　論文類(lèi)型：學(xué)位論文

【摘要】：目前國(guó)內(nèi)功率測(cè)試的儀器，大多是臺(tái)式機(jī)，其價(jià)格昂貴、接口復(fù)雜、體積大、笨重，不便于攜帶進(jìn)行外場(chǎng)測(cè)試；而手持設(shè)備通常功能簡(jiǎn)單，不具有臺(tái)式功率分析儀的數(shù)據(jù)分析能力，同時(shí)不利于組建復(fù)雜的測(cè)試系統(tǒng)。從而對(duì)于便于攜帶同時(shí)又具有分析能力且易于組建復(fù)雜測(cè)試系統(tǒng)的功率測(cè)試儀器需求比較旺盛。 通過(guò)對(duì)市場(chǎng)的調(diào)研和需求分析，以便攜式微波測(cè)試儀器的課題研發(fā)為依托，以有效值功率測(cè)量為切入點(diǎn)，提出設(shè)計(jì)一款價(jià)格便宜、體積小、重量輕、便于攜帶、易于組建復(fù)雜測(cè)試系統(tǒng)的基于USB總線的射頻微波功率計(jì)。對(duì)此功率計(jì)所需的功能展開(kāi)分析，按照虛擬儀器的設(shè)計(jì)思想，提出功率計(jì)系統(tǒng)的總體設(shè)計(jì)方案。整個(gè)系統(tǒng)由兩部分組成，上位機(jī)應(yīng)用軟件系統(tǒng)和USB設(shè)備系統(tǒng)。USB設(shè)備系統(tǒng)主要負(fù)責(zé)射頻信號(hào)的處理，信號(hào)采集以及與上位機(jī)通信等功能。應(yīng)用軟件系統(tǒng)主要完成與功率計(jì)USB設(shè)備的通信，數(shù)據(jù)的分析處理和顯示以及功率的校準(zhǔn)。 本論文主要針對(duì)USB設(shè)備系統(tǒng)展開(kāi)研究和設(shè)計(jì)，USB設(shè)備系統(tǒng)由兩部分組成，硬件電路和控制設(shè)備進(jìn)行數(shù)據(jù)采集和數(shù)據(jù)傳輸?shù)墓碳绦�。�?duì)于射頻信號(hào)的輸入使用50標(biāo)準(zhǔn)SMA頭作為接口，采用可以檢測(cè)有效值功率的對(duì)數(shù)檢波器實(shí)現(xiàn)有效值功率檢測(cè)，以ATMEL公司的AVR單片機(jī)作為系統(tǒng)的核心控制芯片，，實(shí)現(xiàn)數(shù)據(jù)的采集以及與上位機(jī)應(yīng)用軟件系統(tǒng)的USB總線通信。使用Protel99SE對(duì)系統(tǒng)的硬件電路原理圖和PCB板進(jìn)行設(shè)計(jì)和制作。固件程序是在ATMEL公司所編寫(xiě)的開(kāi)發(fā)環(huán)境AVR Studio4.18中使用C語(yǔ)言進(jìn)行開(kāi)發(fā)的，C代碼的編譯采用WinAVR進(jìn)行編譯，使用微控電子開(kāi)發(fā)的JTAGICE燒寫(xiě)器給芯片燒寫(xiě)可執(zhí)行文件，通過(guò)串口調(diào)試助手和總線監(jiān)測(cè)軟件進(jìn)行軟件系統(tǒng)的調(diào)試。通過(guò)實(shí)際的設(shè)計(jì)和制作，并使用射頻信號(hào)源和精密萬(wàn)用表等測(cè)量?jī)x器對(duì)檢波部分做測(cè)量，測(cè)試結(jié)果基本滿足檢波功能要求；使用BusHound總線監(jiān)測(cè)軟件對(duì)USB總線傳輸進(jìn)行監(jiān)測(cè)，其結(jié)果滿足傳輸要求。最后此硬件設(shè)備基本實(shí)現(xiàn)了該硬件系統(tǒng)的設(shè)計(jì)方案。
[Abstract]:At present, most of the domestic power testing instruments are desktop computers, which are expensive, complicated, bulky, bulky, cumbersome and not easy to carry out external field tests, while handheld devices usually have simple functions. It does not have the data analysis ability of desktop power analyzer, and it is not conducive to the construction of complex test system at the same time. Therefore, there is a strong demand for the power test instrument which is easy to carry and has analytical ability and is easy to set up complex test system. Through the market research and demand analysis, based on the research and development of portable microwave test instrument and the effective value power measurement as the breakthrough point, the paper puts forward a design of a cheap, small volume, light weight, easy to carry, RF microwave power meter based on USB bus is easy to set up for complex test system. The function of this power meter is analyzed, and the design idea of virtual instrument is presented. The overall design of the power meter system is put forward. The whole system is composed of two parts. The host computer application software system and the USB device system .USB device system are mainly responsible for the RF signal processing. The application software system mainly completes the communication with the USB equipment of the power meter, the analysis, processing and display of the data and the calibration of the power. This thesis mainly focuses on the research and design of USB device system, which consists of two parts. Hardware circuit and control equipment for data acquisition and data transmission firmware. For RF signal input using 50 standard SMA head as interface, using logarithmic detector which can detect RMS power to realize RMS power detection. The AVR microcontroller of ATMEL Company is used as the core control chip of the system. Data acquisition and communication with USB bus of host computer application software system are realized. The hardware circuit schematic diagram and PCB board of the system are designed and made with Protel99SE. The firmware program is developed in AVR Studio4.18, the development environment of ATMEL Company. The compilation of C code developed in C language is compiled by WinAVR. The JTAGICE burner developed by microcontroller is used to burn the executable file to the chip, and the software system is debugged through serial port debugging assistant and bus monitoring software. The detection part is measured by radio frequency signal source and precision multimeter, and the result basically meets the requirement of detection function, and the transmission of USB bus is monitored by BusHound bus monitoring software. The results meet the transmission requirements. Finally, the hardware system design scheme is basically realized.
【學(xué)位授予單位】：西安科技大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2012
【分類(lèi)號(hào)】：TM933.34;TP334.7

【引證文獻(xiàn)】

相關(guān)期刊論文 前1條

1 孫弋;袁曉霞;;有限空間WIFI無(wú)線信號(hào)覆蓋測(cè)量系統(tǒng)設(shè)計(jì)[J];西安科技大學(xué)學(xué)報(bào);2013年03期

本文編號(hào)：1580001