Abstract:Aimed at the problem that the error of synchronous acquisition method based on a cross-layer design would accumulate rapidly with network expansion, a transmission model for synchronous information was established, and its mechanism was analysed.It is found that the low real-time performance of embedded systems, the random jitter of crystal oscillator and the delay jitter of wireless link are the main reasons of error accumulation.Thus, a control method for the accumulated synchronous error based on the cross-layer design was proposed and a multipath cross-layer design was provided to capture synchronous information and trigger timer.A high accuracy crystal oscillator was adopted to suppress the jitter; The mathematical model for the random delay of wireless link was established, and the regression analysis was adopted to calibrate the caused errors such as the random jitter of synchronous information and the calculation error of transmission delay.Finally, a 4-hop network was constructed to evaluate the proposed method, which shows that the accumulated error is suppressed effectively.
肖鑫,邓蕾,汤宝平,黄艺. 基于跨层设计的机械振动WSNs同步采集多跳累积误差控制方法[J]. 振动与冲击, 2020, 39(9): 97-102.
XIAO Xin, DENG Lei, TANG Baoping, HUANG Yi. Control of accumulated multi-hop synchronous acquisition error based on the cross-layer design of machine vibration WSNs. JOURNAL OF VIBRATION AND SHOCK, 2020, 39(9): 97-102.
[1] FLAMMINI A, FERRARI P, MARIOLI D, et al. Wired and wireless sensor networks for industrial applications[J]. Microelectronics Journal, 2009, 40(9): 1322-1336.
[2] Zhou G, Wang J, Han Y, et al. An Experimental Study on Film Pressure Circumferential Distribution of Water-Lubricated Rubber Bearings with Multiple Grooves[J]. A S L E Transactions, 2016, 60(3):385-391.
[3] 曾超, 汤宝平, 邓蕾,等. 基于混合拓扑的机械无线传感器网络多信道数据传输方法[J]. 振动与冲击, 2018, 37(4).
Zeng C, Tang B, Deng L, et al. A multi-channel data transmission method for mechanical wireless sensor networks based on hybrid topology[J]. Journal of Vibration & Shock, 2018, 37(4).
[4] 黄庆卿, 汤宝平, 邓蕾,等. 机械振动无线传感器网络跨层步采集方法[J]. 仪器仪表学报, 2014, 35(5):1143-1148.
Huang Q, Tang B, Lei D, et al. Synchronous acquisition method based on cross-layer design for machine vibration wireless sensor networks[J]. Chinese Journal of Scientific Instrument, 2014, 35(5):1143-1148.
[5] BOCCA M, ERIKSSON L M, MAHMOOD A, et al. A Synchronized Wireless Sensor Network for Experimental Modal Analysis in Structural Health Monitoring: A synchronized WSN for experimental modal analysis in SHM[J]. Computer-Aided Civil and Infrastructure Engineering, 2011, 26(7): 483–499.
[6] VOGL A, WANG D T, STORÅS P, et al. Design, process and characterisation of a high-performance vibration sensor for wireless condition monitoring[J]. Sensors and actuators a: physical, 2009, 153(2): 155-161.
[7] 郭俊锋, 施建旭, 魏兴春,等. 一种机械振动信号的结构化随机测量矩阵构造方法[J]. 振动与冲击, 2017, 36(7):104-109.
GUO J F, SHI J X, WEI X C, et al. A structured random measurement matrix GCMM for mechanical vibration signals[J]. Journal of Vibration & Shock, 2017, 36(7):104-109.
[8] 裴勇, 汤宝平, 邓蕾,等. 基于信标时序补偿的机械振动无线传感器网络同步触发方法[J]. 振动与冲击, 2014, 33(3):57-62.
Pei Y, Tang B P, Deng L, et al. A WSN mechanical vibration synchronous acquisition trigger protocol based on beacon timing compensation[J]. Journal of Vibration & Shock, 2014, 33(3):57-62.
[9] PING S. Delay measurement time synchronization for wireless sensor networks[J]. Intel Research Berkeley Lab, 2003.
[10] SARI I, SERPEDIN E, NOH K L, et al. On the joint synchronization of clock offset and skew in RBS-protocol[J]. IEEE Transactions on Communications, 2008, 56(5): 700-703.
[11] 汪付强, 曾鹏, 于海斌. 一种低开销的双向时间同步算法[J]. 仪器仪表学报, 2011, 32(6): 1357-1363.
WANG F Q, ZENG P, YU H B. Low overhead two-way time synchronization algorithm[J]. Chinese Journal of Scientific Instrument, 2011, 32(6): 1357-1363.
[12] HUANG D J, TENG W C, YANG K T. Secured flooding time synchronization protocol with moderator[J]. International Journal of Communication Systems, 2013, 26(9): 1092-1115.
[13] DJENOURI D, MERABTINE N, MEKAHLIA F Z, et al. Fast distributed multi-hop relative time synchronization protocol and estimators for wireless sensor networks[J]. Ad Hoc Networks, 2013, 11(8): 2329-2344.
[14] HUANG Q, TANG B, DENG L. Development of high synchronous acquisition accuracy wireless sensor network for machine vibration monitoring[J]. Measurement, 2015, 66: 35-44.
[15] XIAO X, TANG B, DENG L. High accuracy synchronous acquisition algorithm of multi-hop sensor networks for machine vibration monitoring[J]. Measurement, 2017, 102:10-19.