| 基于DSP和单片机的超声波测距系统 |
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| 引用本文： | 陶建平.基于DSP和单片机的超声波测距系统[J].科学技术与工程,2010,10(3). |
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| 作者姓名： | 陶建平 |
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| 作者单位： | 南京农业大学工程学院,南京,210031;东南大学仪器科学与工程院,南京,210096 |
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| 摘 要： | 设计了一种新型的超声波测距系统,系统以单片机和DSP为双控制核心,提出以单片机控制,利用包络检波,微分过零点检测电路确定回波包络峰值点时间。粗测得到误差为一个波长以内的测距结果。之后采用DSP控制进行FFT精测相位差,将粗测和精测的结果进行数据整合,实践证明这种方法有效地提高了测距的精度。
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| 关 键 词： | 超声波测距 DSP 单片机 数据整合 |
| 收稿时间： | 2009/10/15 0:00:00 |
| 修稿时间： | 2009/10/15 0:00:00 |
Ultrasonic detection Ranging System based on DSP and MCU |
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| taojianping.Ultrasonic detection Ranging System based on DSP and MCU[J].Science Technology and Engineering,2010,10(3). |
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| Authors: | taojianping |
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| Institution: | Institute of Engineering/a>;Nanjing Agricultural University/a>;Nanjing 210031/a>;P.R.China/a>;Institute of Instrument Science and Engineering/a>;Southeast University1/a>;Nanjing 210096/a>; |
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| Abstract: | A new ultrasonic ranging system is designed,which uses the microcontroller and DSP for the control core,using envelope detector circuit structure echo envelope,and through differential zero detection circuit set echo envelope peak time.The microcontroller get a rough result that limited the error within one wavelength,and then calculates phase separation through FFT based on DSP,at last both of the results should be integrated.This method use effectively in improving the measurement accuracy. |
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| Keywords: | ultrasonic ranging DSP MCU data integrate |
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