| 高分辨力超声波飞行时间测量系统 |
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| 引用本文： | 胡春海,韩非. 高分辨力超声波飞行时间测量系统[J]. 传感器与微系统, 2005, 24(8): 34-35,38 |
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| 作者姓名： | 胡春海 韩非 |
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| 作者单位： | 燕山大学,电气工程学院,河北,秦皇岛,066004 |
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| 摘 要： | 从超声波飞行时间测量的传统方法入手,分析了这种方法不能提高测量分辨力的原因,阐述了提高测量分辨力的途径和方法;简要介绍了提高测量分辨力关键技术———时间内插法测量飞行时间的工作原理;给出了具体的实施方案———复杂可编程逻辑器件(CPLD)结合无源延迟线实现内插测量,实验验证结果表明:通过时间内插技术完成的飞行时间测量,消除了计数法中整时钟周期误差,大幅度提高了测量分辨力,降低了硬件成本,提高了系统稳定性,具有推广价值。
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| 关 键 词： | 时间内插测量 超声波 复杂可编程逻辑器件 飞行时间 |
| 文章编号： | 1000-9787（2005）08-0034-02 |
| 收稿时间： | 2004-12-23 |
| 修稿时间： | 2004-12-23 |
Ultrasonic high-resolution flight-time measurement system |
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| HU Chun-hai,HAN Fei. Ultrasonic high-resolution flight-time measurement system[J]. Transducer and Microsystem Technology, 2005, 24(8): 34-35,38 |
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| Authors: | HU Chun-hai HAN Fei |
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| Abstract: | The matter that the measurement resolution not improved by traditional way in ultrasonic flight-time measurement is explained. The method and approach by which measurement resolution is improved are presented. Key technology-work principle of measuring flight-time on time-interval is described ; concrete implement plan-time-interval measurement realized by combination of CPLD and passive delay-line is provided. The experiment results show that flight-time measurement is implemented; the whole clock error in count method is eliminated,so the resolution is improved through time-interval technology. Hardware cost is lowered, and system stability is improved. The method is worth spreading. |
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| Keywords: | time-interval measurement ultrasonic wave complex programmable logic device(CPLD) flight-time |
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