Initial Validation of Mobile-Structural Health Monitoring Method Using Smartphones

Yu, Yan; Han, Ruonan; Zhao, Xuefeng; Mao, Xingquan; Hu, Wei; Jiao, Dong; Li, Mingchu; Ou, Jinping

doi:10.1155/2015/274391

Cited by 64 publications

(48 citation statements)

References 9 publications

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“…The smartphone application Orion-CC is possible to not only estimate cable force from the acceleration responses of cable vibration that is extracted using accelerometer embedded in smartphone, but also upload to the data sharing platform and share with the public. Further details regarding the operation guide and cable force measurement of the smartphone application Orion-CC can be seen in [22]. The second smartphone referred to as Smartphone 2, in which a smartphone application D-Viewer is installed, is utilized for the extraction of dynamic characteristics of cable from the dynamic displacement response of a black circle target attached on cable.…”

Section: Experimental Verificationsmentioning

confidence: 99%

“…The three smartphones except Smartphone 1 are placed at about 20 cm away from the cable, respectively, so that the field of view appropriate for the measurement is satisfied without smartphone camera zoom. The reference accelerometer is not installed on the cable because the performance of smartphone built-in accelerometer for cable force measurement has been validated through previous studies [22]. Figure 3 shows the installation of smartphones.…”

Section: Overview Of Experimentmentioning

confidence: 99%

“…Most smartphones have powerful operating system, large memory resource, and a variety of high-performance sensors, and such characteristics are very appropriate for the implementation of SHM. Several researchers studied the application feasibility of smartphone for extracting structural vibration responses from the accelerometer embedded in smartphone [20][21][22][23][24]. Particularly, the smartphone application Orion-CC developed by the authors for smartphone based cloud-SHM [25] is possible to estimate the cable force using the accelerometer embedded in smartphone as well as to upload to the data sharing platform and to share with the public [26].…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Experimental Verification for Cable Force Estimation Using Handheld Shooting of Smartphones

Zhao¹,

Ri²,

Wang³

2017

Journal of Sensors

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Currently, due to the rapid development and popularization of smartphones, the usage of ubiquitous smartphones has attracted growing interest in the field of structural health monitoring (SHM). The portable and rapid cable force measurement for cablesupported structures, such as a cable-stayed bridge and a suspension bridge, has an important and practical significance in the evaluation of initial damage and the recovery of transportation networks. The extraction of dynamic characteristics (natural frequencies) of cable is considered as an essential issue in the cable force estimation. Therefore, in this study, a vision-based approach is proposed for identifying the natural frequencies of cable using handheld shooting of smartphone camera. The boundary of cable is selected as a target to be tracked in the region of interest (ROI) of video image sequence captured by smartphone camera, and the dynamic characteristics of cable are identified according to its dynamic displacement responses in frequency domain. The moving average is adopted to eliminate the noise associated with the shaking of smartphone camera during measurement. A laboratory scale cable model test and a pedestrian cable-stayed bridge test are carried out to evaluate the proposed approach. The results demonstrate the feasibility of using smartphone camera for cable force estimation.

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Section: Experimental Verificationsmentioning

confidence: 99%

Section: Overview Of Experimentmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Experimental Verification for Cable Force Estimation Using Handheld Shooting of Smartphones

Zhao¹,

Ri²,

Wang³

2017

Journal of Sensors

Self Cite

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“…Smartphones as a mobile-based information technology can be a solution to benefit quick seismic damage investigation and emergency communication in postdisaster relief experience. With an operating system, communication system, and built-in sensors, they have already been used in many fields other than the communication field, including human health monitoring [14], vehicle accident detection [15], motivation recognition [16], seismic sensing [17], and structural health monitoring [18][19][20][21][22][23][24][25]. What is more, smartphones and the Internet provide a means to use after an earthquake when a response is needed, especially since individuals are becoming very comfortable with the use of smartphones.…”

Section: Introductionmentioning

confidence: 99%

Emergency Communication and Quick Seismic Damage Investigation Based on Smartphone

Han

Zhao

et al. 2016

Advances in Materials Science and Engineering

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The communications in the quake-hit area are always cut off from the outside after the earthquake, and the traditional seismic field investigation method calls for immense time to accomplish house-to-house investigation, which goes against timeliness of the emergency rescue. In this paper, an emergency communication and quick seismic damage investigation method based on smartphone is proposed. Towards this, an application, E-Explorer, on iOS platform is initially developed. First, in the emergency communication module, the communication is available by using the Multipeer Connectivity Framework technology even without external network. A series of validation experiments are simulated without external network, and the results prove convincing. This module enhances the possibility of communication and increases the chances for rescue. Second, in the damage investigation module, E-Explorer integrates the functions of questionnaire and picture collection for damage phenomenon recording and image acquisition, following an intensity evaluation method according to seismic index. Last, a website, which provides guidance for rescue workers and collects damage information for quick intensity evaluation, is being built.

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“…A cable structure is a structural member that can efficiently bear tension and is commonly used in large span and highrise structures [1,2], such as a cable-stayed bridge, suspension bridge, arch bridge, tower mast structure, and so on. The distribution of the cable force largely affects the stability of the cable structure.…”

Section: Introductionmentioning

confidence: 99%

Portable and convenient cable force measurement using smartphone

Zhao

Han

Ding

et al. 2015

J Civil Struct Health Monit

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Cable force measurement is an essential step in bridge construction and structural health evaluation; it has developed rapidly in recent years and can be achieved using a wireless sensor network, which greatly reduces the monitoring cost and improves the efficiency of monitoring compared with traditional monitoring methods. However, expensive sensors, devices, transfer systems, and professionally trained technicians are needed in a wireless network system. Therefore, it is necessary to develop a portable and convenient method that requires less professional components. Smartphones with powerful operating systems are becoming popular; some have built-in highperformance sensors and a network that can transmit data. Based on these facts, a novel cable force measuring method using smartphone was proposed in this work. An iPhonebased cable force measurement software named OrionCloud Cell (Orion-CC) was developed and launched in the Apple App Store by our group. It has the advantages of being low cost, convenient, time saving, and easy-to-operate. First, a comparison test between an iPhone and a wireless monitoring method was conducted to verify the feasibility of a cable force measuring method using smartphones. Second, Orion-CC was applied to laboratory cable model tests. A comparison of the results from Orion-CC and MATLAB post-processing data proved the accuracy and operability of this method. Finally, this method was applied to the Dalian Xinghai Bay Cross-sea Bridge, which demonstrated its efficiency in an actual engineering application.

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Initial Validation of Mobile-Structural Health Monitoring Method Using Smartphones

Cited by 64 publications

References 9 publications

Experimental Verification for Cable Force Estimation Using Handheld Shooting of Smartphones

Experimental Verification for Cable Force Estimation Using Handheld Shooting of Smartphones

Emergency Communication and Quick Seismic Damage Investigation Based on Smartphone

Portable and convenient cable force measurement using smartphone

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