电梯安全超速调速器的图像识别测量方法及不确定度

IF 1.5 4区 工程技术 Q3 CONSTRUCTION & BUILDING TECHNOLOGY
Yongming Zhang, Yicheng Zhao, Zhe Yan, Shuangchang Feng, Jie Chen
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引用次数: 0

摘要

电梯安全与公共安全密切相关。超速调速器是电梯安全系统的重要组成部分。其检查和校准涉及跳闸速度的测量。经常使用的接触式测量方法存在风险。本文提出了一种基于摄像头的非接触式图像识别测量方法,包括转子中心识别、特征点匹配和跳闸开关识别。速度曲线可以通过基于转子中心的特征点位移来获得。跳闸开关识别可以确定速度曲线中的电气和机械跳闸速度。实验结果表明,该方法与常见的接触式测量方法没有显著差异,同时显著消除了物理损伤的风险,提高了测量安全性。此外,本文还提出了由摄像机性能决定的测量不确定度的推导和计算。由于测量安全性的提高,所提出的方法将在电梯检测领域有进一步的应用。实际应用:本文对调速器跳闸速度测量的研究主要是基于图像识别和摄像头的辅助。实验结果表明,该方法能够在无接触的情况下完成调速器的转速测量。与接触式测量方法相比,所提出的方法显著降低了物理损伤的风险,并提高了测量安全性。所提出的非接触式图像识别方法可以替代现有的接触式方法,有助于电梯的检测、维护和管理,具有进一步的应用前景。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
An image recognition measurement approach and uncertainty for overspeed governors employed in elevator safety
Elevator safety is closely related to public safety. Overspeed governor is a crucial part of the elevator safety system. Its inspection and calibration involve the measurement of tripping velocity. The frequently-used contact-type measurement method has risks. This paper proposes a non-contact image-recognizing measurement method by the camera, which includes the processes of rotor centre recognition, feature points matching, and tripping switches recognition. The velocity curve can be obtained by feature points displacement based on the rotor centre. Tripping switches recognition can determine the electrical and mechanical tripping velocities in the speed curve. The experimental results demonstrate that the proposed method has no significant difference from the common contact-type measurement method, while it significantly eliminates the risks of physical damage and improves measurement safety. Moreover, this paper proposes the deduction and calculation of measurement uncertainty decided by camera performance. Due to the enhancement of measuring safety, the proposed method will have further application in the field of elevator inspection. Practical application: The research on tripping velocity measurement for overspeed governor in this paper is principally based on image recognition with the help of a camera. The experiment result indicates that the proposed method is capable of completing the speed measurement for the overspeed governor without contact. The proposed method significantly mitigates the risks of physical damage and improves measurement safety rather than the contact-type measurement method. The proposed non-contact image-recognizing method can substitute for the existing contact-type method and contributes to the inspection, maintenance, and management of elevators, which will have further application prospects.
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来源期刊
Building Services Engineering Research & Technology
Building Services Engineering Research & Technology 工程技术-结构与建筑技术
CiteScore
4.30
自引率
5.90%
发文量
38
审稿时长
>12 weeks
期刊介绍: Building Services Engineering Research & Technology is one of the foremost, international peer reviewed journals that publishes the highest quality original research relevant to today’s Built Environment. Published in conjunction with CIBSE, this impressive journal reports on the latest research providing you with an invaluable guide to recent developments in the field.
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