倾角传感器在线校准的激励源影响性分析

doi:10.3969/j.issn.1000-1158.2019.04.04

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摘要传感器是桥梁健康监测数据采集的关键部件,然而由于缺少合适的激励源和在线校准方法,在用桥梁健康监测系统传感器的计量性能难以在现场条件下得到有效验证。为探索利用行驶车辆的组合加载效应作为激励源进行桥梁健康监测传感器在线校准的可行性,提出了基于共源激励条件下序列数据分析的试验方法。以简支梁模型桥为基础,模拟了中心挠曲变形增量0～10mm,加载变化周期分别为5,10,15,20s的条件下,倾角传感器在线校准的激励条件,试验验证了激励源特性对校准结果稳定性的影响。统计学假设检验认为在显著性水平为0.05的条件下,激励源所引起的挠曲变形量、加载变化周期等对所试倾角传感器的校准结果无显著影响。

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	荆根强
	段发阶
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	罗翥

关键词 ：计量学, 桥梁健康监测, 在线校准, 倾角传感器, 激励源

Abstract：Sensors are key units of bridge health monitoring (BHM) systems for data collection. However, their measuring performance cannot be easily verified in situ for the absence of proper excitation sources and methods. An online calibrating method is presented which aims at using the load combination by traffic vehicles as an excitation source. To verify the impacts of excitation characteristics on the stability of calibrating results, an experiment is designed with input deflection step length ranging from 0 to 10mm and variation period being 5s, 10s, 15s and 20s. The experiment is performed on a simply supported beam bridge model under random excitation simulated by a programmable linear module. Hypothesis testing is conducted with the experimental results, which shows that given the significance level 0.05, the deflection amplitude and period of excitation source have no effect on calibrating results of the sensors.

Key words： metrology bridge health monitoring online calibration tilt sensor excitation source

收稿日期: 2019-01-14 发布日期: 2019-06-10

PACS:

TB922

基金资助:国家重点研发计划(2017YFF0206305)

通讯作者: 荆根强 E-mail: gq.jing@rioh.cn

作者简介: 荆根强(1978-),男,河南郑州人,交通运输部公路科学研究所教授级高工,主要研究方向为激光视觉测量技术、结构健康监测传感器在线计量技术、公路工程数字化仪器远程计量技术等。Email: gq.jing@rioh.cn

引用本文:

荆根强,段发阶,李建双,罗翥. 倾角传感器在线校准的激励源影响性分析[J]. 计量学报, 2019, 40(4): 563-568.
JING Gen-qiang,DUAN Fa-jie,LI Jian-shuang,LUO Zhu. Statistical Analysis on the Impacts of Excitation Sources on Tilt Sensors Online Calibration. Acta Metrologica Sinica, 2019, 40(4): 563-568.

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http://jlxb.china-csm.org:81/Jwk_jlxb/CN/10.3969/j.issn.1000-1158.2019.04.04 或 http://jlxb.china-csm.org:81/Jwk_jlxb/CN/Y2019/V40/I4/563

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