5简易电阻电容电感测试仪设计报告.doc

编号： 2009年滨州学院大学生电子设计竞赛： C题：简易电阻电容电感测试仪 参赛学生：翰耀元 刘丽娇 王增加 系 院：滨州学院物理与电子科学系 目 录 1 方案比较与论证 1 1.1 单片机选择 1 1.2 总体方案设计选择与论证 1 2 硬件系统设计 2 2.1 电阻测量电路 2 2.2 电容测量电路 3 2.3电感测量电路 4 2.4多路选择电路.......................................................................5 2.5按键及数码管显示电路..........................................................6 2.6 直流稳压电源.........................................................................8 3.软件设计 10 3.1I/O口的分配...........................................................................10 3.2主程序流程图.........................................................................11 3.3中断服务程序流程.................................................................12 4 测试说明 13 4.1 测试仪器 13 4.2测试数据 13 5 结论 14 6 参考资料 14 简易电阻电容电感测试仪 摘要：本系统是通过凌阳的16位单片机SPCE061A测量电阻、电容和电感对应振荡电路所产生的频率实现各个参数的测量，一方面测量精度较高，另一方面便于使仪表实现自动化　　其中电阻和电容是采用555多谐振荡电路产生的，而电感则是根据电容三点式产生的。SPCE061A的定时器可以利用外部时钟源来计数，这里我们将RCL的测量电路产生的频率作为单片机SPCE061A的时钟源，通过计数则可以计算出被测频率在通过该频率计算出各个参数。Abstract:The system through the Sunplus 16-bit single-chip measurement SPCE061A resistors, capacitors and inductors corresponding oscillation frequency generated by circuit implementation of the various parameters measured, on the one hand, a higher measurement accuracy, on the other hand, so easy to achieve automated instrument, but also voice broadcast can add to make them more intelligent functions. One of resistors and capacitors are used more than 555 have a harmonic oscillator circuit, and the inductor is based on three-point capacitance generated. SPCE061A timer external clock source can be used to count, here we will have a RCL circuit measuring the frequency of SPCE061A as a single-chip clock source, through the count can be calculated at the frequency measured by the frequency of the various parameters calculated. Keyword:16 single-chip Sunplus SPCE061A; 555 many harmonic oscillation circuit; capacitance three-point shock; RC shock 1 方案比较与论证 简易电阻电容电感测试仪的设计总体框图如下图