多通道超声的双向单程伪距测量研究  

Research on dual one-way pseudorange measurement of multi-channel ultrasound

作　　者：赵佰秋 孟立新[1,2] 于笑楠 张立中[1,2] 佟首峰[1] Zhao Baiqiu;Meng Lixin;Yu Xiaonan;Zhang Lizhong;Tong Shoufeng(National and Local Joint Engineering Research Center for Space Optoelectronic Technology,Changchun University of Science and Technology,Changchun 130022,China;College of Mechanical and Electrical Engineering,Changchun University of Science and Technology,Changchun 130022,China)

机构地区：[1]长春理工大学空间光电技术国家与地方联合工程研究中心,长春130022 [2]长春理工大学机电工程学院,长春130022

出　　处：《电子测量与仪器学报》2020年第9期174-180,共7页Journal of Electronic Measurement and Instrumentation

摘　　要：超声波测距是一种非接触测量方式,在工业、交通等行业应用广泛。为提高超声波的测距量程,解决多通道在通道间距离较近时的串扰噪声问题,在不改变电声转换器与发射接收硬件电路前提下,将"双向单程伪距测量技术"应用到超声波测距系统中,利用双向单程测量替代了传统的反射式双程测距,通过无线串口通信进行测距主端与测距从端的时钟同步,提高测距量程,该技术还可消除系统自身的时钟同步误差。同时应用"时分多路复用"技术,通过无线电信号广播进行时隙分配,使任意时刻测距信道中只有单路处于工作状态,实现多通道近距离通道间隔下无串扰测量。实验结果表明,双向单程测量可以将反射测距量程提升1倍以上,探测精度优于1%。时分多路复用技术的引用,可以实现超声多通道近距离通道间隔下测量无串扰。Ultrasonic ranging is a non-contact measurement method that is widely used in industry and transportation.In order to improve the ranging range of ultrasonic waves and solve the problem of crosstalk noise when the distance between multiple channels is relatively close,applies“dual one-way pseudorange measurement technology”to the premise of changing the electroacoustic converter and transmitting and receiving hardware circuits.In the ultrasonic ranging system,the dual one-way measurement replaces the traditional reflective two-way ranging,and the clock between the ranging main end and the ranging slave is synchronized by the wireless serial communication to improve the ranging range,and the technology can also eliminate the system itself.Clock synchronization error.At the same time,the“time division multiplexing”technology is applied to perform time slot allocation through radio signal broadcasting,so that only one path in the ranging channel at any time is in a working state,and multi-channel close-range crosstalk-free measurement is realized.The experimental results show that the dual one-way measurement can more than double the reflection ranging range,and the detection accuracy is better than 1%.The reference of the time division multiplexing technique enables measurement of crosstalk without interference in ultrasonic multi-channel short-range channel spacing.

关 键 词：超声波测距 双向单程伪距测量 时分多路复用 测距量程 串扰噪声 

分 类 号：TB551[理学—物理] TN98[理学—声学]