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FPGA硅微谐振式加速度计测频电路设计+电路图+程序

时间:2020-11-26 20:25来源:毕业论文
再用MATLAB进行仿真,最后用Verilog HDL硬件编程语言对FPGA进行编程来实现测频的功能。 在最后的实验中,本次论文设计的测频电路完全达到要求,并且分辨率达到0.08mHz,所以这种测频方

 摘要硅微谐振式加速度计可将被测加速度直接转换为稳定性和可靠性都很高的频率信号,因此可以获得优良的性能。当然由此也能够简化应用系统的处理电路而充分的发挥MEMS 传感器体积小的优点。所以做出一个精度高,可靠性高的测频电路是十分关键的。本论文的所做的测频电路要实现的目标为:谐振式加速度计的中心谐振频率为23kHz、量程为±15g、标度因数为 80Hz/g、分辨率为 0.01Hz。      在论文中采用的是锁相环测频法,锁相环是由鉴相器、环路滤波、压控振荡器三部分组成,首先将不同模块的功能进行划分,然后找到理论与方法后将其实现,最后再将各个模块拼接成测频电路。本次设计时,先确定设计方案,再用MATLAB进行仿真,最后用Verilog HDL硬件编程语言对FPGA进行编程来实现测频的功能。  在最后的实验中,本次论文设计的测频电路完全达到要求,并且分辨率达到0.08mHz,所以这种测频方法可以适用于硅微机械加速度计。 59964  
毕业论文关键词    频率测量      锁相环     FPGA       MATLAB 
Title  The Frequency Measurement Circuit of Micromechanical     Silicon Resonant Accelerometer                     
 Abstract The  micromechanical  silicon resonant accelerometer  can  transform the measured acceleration into frequency shift which is stable and reliable,so the accelerometer may get better performance.Of course, this also simplifies processing circuit of the application system . This will take the  full  advantages of small size  for  MEMS sensors. So to make a frequency measurement circuit of high precision and high reliability is crucial. So the paper discussed the design of the data acquisition system for the micromechanical  silicon  resonant accelerometer.The design target is that the system  can  acquire the differential frequency  signals of the resonant accelerometer with the resolution of 0.01  Hz,  corresponding to  0.125mg  on condition  that the resonant accelerometer has a normal  frequency of 23  KHz, a scale factor of 80 Hz/g,and a measuring range of±15g. In this paper ,new frequency measurement method based on  PLL(Phase-locked loop) is adopted. Phase-locked loop consists of phase discriminator, loop filter and the voltage-controlled oscillator of three parts. Divide the functions of different modules first, and then find the theory and method to implement it, finally, various modules patchwork into frequency measuring circuit.  In this design, to determine the design scheme, use MATLAB  to do the  simulation, finally on the FPGA using Verilog HDL language programming to achieve the function of frequency measurement. At the end of the experiment, the frequency measurement circuit completely meet the requirements, and resolution is 0.08 mHz, so this kind of frequency measurement method can be applied to  the  micromechanical  silicon resonant accelerometer.   
Keywords    Frequency Measurement  Phase-Locked Loop  MATLAB  FPGA   

目   次  

1.绪论.  1 

1.1 微机电系统与硅微加速度计简介  1 

1.1.1微机电系统概述    1 

1.1.2硅微加速度计概述  .  2 

1.1.3硅微谐振式加速度计工作原理    2 

1.2 硅微谐振式加速度计数据采集国内外现状.  3 

1.3 论文的主要内容..  4 

2.硅微谐振式加速度计数据采集方案..  5 

2.1频率测量的基本方法  .  5  FPGA硅微谐振式加速度计测频电路设计+电路图+程序:http://www.youerw.com/zidonghua/lunwen_65306.html

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