| 高速运动物体制动全过程测量 |
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| 引用本文： | 于烨军,蔡萍,吴展,戴舒文.高速运动物体制动全过程测量[J].测控技术,2009,28(4). |
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| 作者姓名： | 于烨军 蔡萍 吴展 戴舒文 |
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| 作者单位： | 上海交通大学,测试计量技术与仪器系,上海,200240 |
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| 摘 要： | 介绍了一种基于激光光幕测速原理的新型测速系统,利用固联在运动物体上的参考齿形挡光板、一对激光发射/接收装置和大缓冲容量、大动态范围的高速计数电路,在制动行程内,实现运动物体从较高初速至准静态的全过程速度测量.介绍了测速系统的工作原理和硬件设计,并进行了误差分析.现场试验的结果证明该方法能对准静态速度至65 m/s的速度范围进行准确测量.在齿形板齿间距3mm情况下最高速段能保证200个测量脉冲,测时误差最大为0.125 μs.高速段测速误差在0.833%以内,低速段误差在0.334%以内.
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| 关 键 词： | 制动过程 激光测速 光电转换 全过程测量 |
Whole Braking Process Measurement of the High-Speed Object |
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| YU Ye-jun,CAI Ping,WU Zhan,DAI Shu-wen.Whole Braking Process Measurement of the High-Speed Object[J].Measurement & Control Technology,2009,28(4). |
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| Authors: | YU Ye-jun CAI Ping WU Zhan DAI Shu-wen |
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| Affiliation: | Department of Instrument Science and Engineering;Shanghai Jiaotong University;Shanghai 200240;China |
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| Abstract: | A novel velocity measuring system based on laser screen is introduced.By using a tooth-type bar fixed on the moving object,a pair of laser diode/photodiode and a high-speed counting circuit with large dynamic range and buffer capacity,the system realizes the whole process measuring of the moving object with the velocity from high to quasi-static.The working principle and hardware designing are introduced.In-depth analysis of errors is performed also.The field test results show that the system can accurately... |
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| Keywords: | braking process laser velocity measurement photoelectric conversion whole process measuring |
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