矿用本安型超声测距换能系统电阻抗匹配设计
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摘要
针对矿用超声测距系统经本质安全化设计后能量转换效率提高以及驱动电压受限的问题,对本安驱动下电能传输匹配的实现和协调展开了研究,设计基于高速光耦升压驱动回路的LRC电阻抗匹配网络以提高能量转换效率,并选取不同匹配参数来降低驱动脉冲波谷电压幅值,进而可在测距性能保持不变的前提下明显降低最低驱动电压。实验结果表明,在测距距离一定时超声测距系统通过LRC电网络阻抗匹配可显著降低超声换能器所需的驱动电压至11 V左右,并有效提高能量转换效率。
Aiming that the improvement of energy conversion efficiency and the limited driving voltage after intrinsically safe design is a knotty issue in mining ultrasonic ranging system, in this paper, the research of realization and coordination of the electric energy transmission and matching for intrinsically safe driving were carried out. The LRC impedance matching network based on high speed optocoupler boost driver circuit was designed to improve the energy conversion efficiency. Then, by selecting different matching parameters, the trough voltage amplitude of driving pulse was reduced. Therefore, the minimum driving voltage is significantly reduced while the ranging performance remains unchanged. The experimental results show that the ultrasonic distance measurement system can significantly reduce the driving voltage to 11 V, and effectively improve the energy conversion efficiency when the ultrasonic distance measurement system is based on the LRC electrical network impedance matching.
Aiming that the improvement of energy conversion efficiency and the limited driving voltage after intrinsically safe design is a knotty issue in mining ultrasonic ranging system, in this paper, the research of realization and coordination of the electric energy transmission and matching for intrinsically safe driving were carried out. The LRC impedance matching network based on high speed optocoupler boost driver circuit was designed to improve the energy conversion efficiency. Then, by selecting different matching parameters, the trough voltage amplitude of driving pulse was reduced. Therefore, the minimum driving voltage is significantly reduced while the ranging performance remains unchanged. The experimental results show that the ultrasonic distance measurement system can significantly reduce the driving voltage to 11 V, and effectively improve the energy conversion efficiency when the ultrasonic distance measurement system is based on the LRC electrical network impedance matching.
引文
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[9]张悦,陈劲操.基于单相全桥逆变拓扑的超声波测距系统设计[J].仪表技术与传感器,2016(4):67-70.
[10]唐慧强、徐昊德,刘佳.基于ARM11的长距离高精度超声波测距仪.仪表技术与传感器,2015(10):35-37.
[11]潘仲明,祝琴.压电换能器阻抗匹配技术研究[J].应用声学,2007,26(6):357-361.
[2]ZHANG H J,WANG Y,ZHANG X,et al.Design and performance analysis of an intrinsically safe ultrasonic ranging sensor.Sensors,2016,16(6):1-17.
[3]刘树林,刘健,钟久明.输出本质安全型Buck-Boost DCDC变换器的分析与设计[J].中国电机工程学报,2008,28(3):60-65.
[4]孟庆海,牟龙华,王崇林,等.本质安全电路的功率判别式[J].中国矿业大学学报,2004,33(3):292-294.
[5]袁义坤,赵增辉,王育平,等.超声波电动机定子等效电路模型及驱动电路的阻抗匹配[J].微特电机,2012,40(2):62-63.
[6]简盈,王跃科,潘仲明.超声换能器驱动电路及回波接收电路的设计[J].自动化与仪器仪表,2014(11):31-33.
[7]宋雁鹏,李晓,王志斌,等.声光可调谐滤波器驱动系统设计[J].压电与声光,2015,37(4):721-725.
[8]赵海鸣,卜英勇,王纪婵.一种高精度超声波测距系统的研制[J].矿业研究与开发,2006,26(3):62-65.
[9]张悦,陈劲操.基于单相全桥逆变拓扑的超声波测距系统设计[J].仪表技术与传感器,2016(4):67-70.
[10]唐慧强、徐昊德,刘佳.基于ARM11的长距离高精度超声波测距仪.仪表技术与传感器,2015(10):35-37.
[11]潘仲明,祝琴.压电换能器阻抗匹配技术研究[J].应用声学,2007,26(6):357-361.