矿用本安型超声测距换能系统电阻抗匹配设计  

Impedance Matching Design for Mining Intrinsically Safe Ultrasonic Ranging Transducer System

作　　者：李杨[1] 张红娟[1] 王宇[2] 高妍[1] 王东[2] 靳宝全[2] LI Yang ZHANG Hong-juan WANG Yu GAO Yan WANG Dong JIN Bao-quan(College of Electrical ＆ Power Engineering, Taiyuan University of Technology ,Taiyuan 030024, China Key Lab of Advanced Transducers and Intelligent Control System, Ministry of Education and Shanxi Province, Taiyuan University of Technology ,Taiyuan 030024, China)

机构地区：[1]太原理工大学电气与动力工程学院,山西太原030024 [2]太原理工大学新型传感器与智能控制教育部与山西省重点实验室,山西太原030024

出　　处：《仪表技术与传感器》2017年第7期79-83,共5页Instrument Technique and Sensor

基　　金：国家自然科学基金资助项目(51504161)

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.

关 键 词：超声测距 本质安全 阻抗匹配 电压驱动 

分 类 号：TP274[自动化与计算机技术—检测技术与自动化装置]