车载超声测距仪的研制

超声测距在一些场合有其独特的优越性，车载超声测距仪应用于汽车和货车等车辆。介绍了采用脉冲回波法进行车载超声测距仪的设计原理、超声波声速与空气温度的关系和超声波的传播特性，阐述了车载超声测距仪的硬件系统和软件系统设计，分析了部分硬件电路，给出了实验结果，并分析了产生误差的原因。从实验和使用的结果看，系统设计能够满足要求。     Research and Development the Instrument of UltrasoundDistance Measurement in Vehicle

Zhang Hesheng1，Song Mingyao2
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(1.School of Electrical Engineering,Northern Jiaotong University，Beijing 100044，China;2.Department of R&D Baoji Xintie Maintenance Mechinerary Co.Ltd.,Baoji 721003,China)

Abstract： There are special advantages of ultrasound distance measurement in some cases.The instrument of ultrasound distance measurement in vehicle developed by us is used in the car and truck.Principle of instrument of ultrasound distance measurement in vehicle using pluses echo method,the relationship between the speed of the ultrasound and the air temperature and the characteristic of ultrasound are introduced.The designs of hardware and software of the instrument of ultrasound distance measurement in vehicle are presented.The results of experiments and analysis of the reasons to cause the error are also given.From the view of the result of experiments and the use of the instrument,all requirements are satisfied.

Key Words： Ultrasound Distance Measurement；Pluses Echo Method；Time

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