| 摘要: |
| 中精度频率测量电路主要用于中精度石英振梁加速度计频率输出的二次测量。通过比较并选择合适的测量方法，详细地分析了方案的理论误差，研究基于Nios Ⅱ嵌入式处理器的测频电路，将数据采样和运算单元都集成在FPGA芯片中，形成一个片上操作系统SOPC，获得了较高精度的测量结果。 |
| 关键词: 测频 FPGA 嵌入式处理 SOPC |
| DOI： |
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| 基金项目: |
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| SOPC Medium Precision Design for Frequency Measurement Circuit Based on Nios Ⅱ |
| DONG Jian-shu,YUAN Xiao-yu,WANG Hui,YAN Zong-rui |
| (Beijing Institute of Automatic Control Equipment;Beijing Revitalization Institute of Measurement and Test;Nanjing Naval Command Academy) |
| Abstract: |
| The medium precision frequency measurement circuit is presented for the second measurement of quartz flap accelerator’s frequency output.Firstly，the scheme’s theoretical error is analyzed in detail by comparing and selecting proper measurements.Secondly，the frequency measurement circuit based on Nios Ⅱ embedded processor is discussed：both the data sampling and operation unit are integrated in FPGA chip，which forms SOPC，and a higher precision measurement result is achieved. |
| Key words: Frequency measurement FPGA Embedded processing SOPC |
