sopc报告

2012年湖北大学生电子设计竞赛--------ALTERA杯SOPC专题竞赛项目报告地沟油快速检测装置Deviceforquicklyidentifyingillegalcookingoil学院：电子与电气工程学院小组成员：蔡明喜、陈婉、石楚雄指导老师：田裕康完成日期：2012年10月16日作品原创性声明本小组郑重声明：所呈交的湖北省大学生电子设计竞赛ALTERA杯SOPC专题竞赛作品，是本小组在指导教师的指导下，独立进行创作工作所取得的成果。除文中已经注明引用的内容外，本作品不包含任何其他个人或集体已经发表或撰写过的作品成果。本人完全意识到本声明的法律结果由本人承担。作品作者签名：日期：年月日摘要本项目是基于NiosII软核处理器（MCU）的地沟油快速检测装置，旨在实现“地沟油”快速，现场检测。首先采用可编程的直接数字频率合成器（DDS）产生正弦激励信号，经过低通滤波器（LPF）作用于阻抗传感器（实验室制作）后通过模数转化（ADC），MCU对采集的信号通过快速傅里叶变换（FFT）处理，实现地沟油阻抗与相角的检测，检测值在LCD上显示，并用微型打印机打印出检测结果。该仪器具有检测结果可靠、便携式和显示直观等优点。关键字：NiosII软核处理器DDS阻抗传感器FFTAbstractThedeviceforquicklyidentifyingisbasedonNiosIIsoftcoreprocessor,andaimingattherealizationofillegalcookingoilfastandfieldtesting.Firstofall,itcanbeadoptedwithprogrammableDirectDigitalfrequency-Synthesizer(DDS)thatproducessinesignal,throughlowpassfilter(LPF)effectsonimpedancesensor(labproduction),thensignalthroughanalog-to-digitalconversion(ADC),MCUprocessesthesamplesignalthroughthefastFouriertransform(FFT),thatrealizesthedetectionaboutimpedanceandphaseAngleoftheillegalcookingoil.TheresultisdisplayedonLCD,andisprintedoutbymicroprinter.Theinstrumenthastheadvantagesofhighreliability,portableandintuitivedemonstration.Keywords:NiosIIsoftcoreprocessorDDSimpedancesensorFFT摘要...............................................................................................................................3一．引言.......................................................................................................................5二．系统方案...............................................................................................................5三．功能与指标...........................................................................................................63.1功能描述.........................................................................................................6DDS模块......................................................................................................6信号处理部分...............................................................................................6FFT模块........................................................................................................64.LCD显示模块和微型打印机模块...........................................................73.2性能参数.........................................................................................................71、系统资源使用情况.................................................................................72、系统性能指标.........................................................................................7四．实现原理...............................................................................................................7五．硬件设计...............................................................................................................81.整理框图............................................................................................................82、分模块设计.....................................................................................................81）DDS介绍................................................................................................92）低通滤波器的设计...............................................................................103)阻抗传感器..............................................................................................114）模数转换...............................................................................................125）快速傅里叶变换FFT............................................................................12六．软件设计原理.....................................................................................................141、SOPC资源配置情况....................................................................................142)系统软件流程图..............................................................................................15七、系统测试.............................................................................................................151、测试仪器.......................................................................................................152、测试方法.......................................................................................................16八．系统创新.............................................................................................................161、传感器检测部分...........................................................................................162、实现阻抗与相角的转化中算法的运用.......................................................16九．设计总结.............................................................................................................16十.参考文献................................................................................................................17附录.............................................................................................................................17一．引言地沟油，泛指生活中的各类劣质油，如从下水道中的油腻漂浮物或餐饮行业的泔水、从劣质猪肉、内脏或猪皮和反复使用的炸油中提炼加工出的油，经过不法者的勾兑，摇身变成餐桌上的“食用油”。由于地沟油中含有细菌、真菌、霉素、苯并芘以及超标的铅、砷，长期食用会引发癌症，对人体的危害极大。由于存在很大的经济诱惑，仍有人铤而走险销售地沟油。2011年全国公安机关破获一批跨省特大地沟油案件，打掉了非法利用地沟油炼制食用油的犯罪链条，揭开了不