Strong Motion Measurement Using Security Video Cameras

Hori, Muneo; Sutoh, Atsushi; Saitoh, Yoshihito

doi:10.2208/jscej.2000.647_57

Cited by 6 publications

(3 citation statements)

References 5 publications

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“…Therefore, it is generally difficult to retrieve the ground motion from the video recordings without knowing the characteristics of the video camera and the site in which it is installed. SAITO et al, (1997) andHORI et al, (2000) discussed the theoretical framework of using video information to retrieve strong motion parameters. One of the difficulties in using this method is that the parameters of the video camera, such as the installation conditions, have to be known, which is hardly realistic for the case of Wenchuan earthquake.…”

Section: Ground Acceleration Estimated From Monitoring Videosmentioning

confidence: 99%

Estimating Intensities and/or Strong Motion Parameters Using Civilian Monitoring Videos: The May 12, 2008, Wenchuan Earthquake

Yang

Jiang

et al. 2010

Pure Appl. Geophys.

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One of the important issues in macroseismology and engineering seismology is how to get as much intensity and/or strong motion data as possible. We collected and studied several cases in the May 12, 2008, Wenchuan earthquake, exploring the possibility of estimating intensities and/or strong ground motion parameters using civilian monitoring videos which were deployed originally for security purposes. We used 53 video recordings in different places to determine the intensity distribution of the earthquake, which is shown to be consistent with the intensity distribution mapped by field investigation, and even better than that given by the Community Internet Intensity Map. In some of the videos, the seismic wave propagation is clearly visible, and can be measured with the reference of some artificial objects such as cars and/or trucks. By measuring the propagating wave, strong motion parameters can be roughly but quantitatively estimated. As a demonstration of this 'propagating-wave method', we used a series of civilian videos recorded in different parts of Sichuan and Shaanxi and estimated the local PGAs. The estimate is compared with the measurement reported by strong motion instruments. The result shows that civilian monitoring video provide a practical way of collecting and estimating intensity and/or strong motion parameters, having the advantage of being dynamic, and being able to be played back for further analysis, reflecting a new trend for macroseismology in our digital era.

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Section: Ground Acceleration Estimated From Monitoring Videosmentioning

confidence: 99%

Estimating Intensities and/or Strong Motion Parameters Using Civilian Monitoring Videos: The May 12, 2008, Wenchuan Earthquake

Yang

Jiang

et al. 2010

Pure Appl. Geophys.

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“…Since it is not necessary to attach devices directly to the object, it is easy to install the system in various kinds of environment. There is an example of application of a surveillance camera for input motion measurements (Hori 2000). If existing surveillance cameras are available, we have only to add the data processing system for vision-based measurements to the existing system.…”

Section: Vision-based Systemsmentioning

confidence: 99%

Vision-Based Measurements for Seismic Damage Monitoring

et al. 2004

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Motion tracking with optical devices such as surveillance cameras can be particularly powerful for measuring earthquake induced motions. We propose a vision-based system with motion tracking for providing additional safety functions to detect seismic damage to interior elements and thus reduce risks in a building. Shaking table tests were carried out to evaluate the system's ability to detect structural collapse and overturning of interior elements using conventional video cameras. Results from this exploratory study show that vision-based measurements are promising in terms of capturing small to large deformations and identifying various kinds of seismic damage.

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“…These techniques have been utilized for monitoring movement of objects especially in laboratories [1][2][3][4]. There is also an example of application of a surveillance camera for input motion measurements [5].…”

Section: Introductionmentioning

confidence: 99%

Monitoring of earthquake induced motions and damage with optical motion tracking

Kanda¹,

Miyamoto²,

Kondo³

et al. 2005

Smart Mater. Struct.

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Optical motion tracking technologies using surveillance cameras have been applied to the measurement of earthquake induced motions and detection of seismic damage to interior elements to reduce risks in a building. We have developed methods for detecting structural collapse and overturning of interior elements. Shaking table tests were carried out to evaluate the optical system's ability to detect damage. The movements of two-storey frame structures and rectangular pieces of wood on the shaking table were monitored using conventional video cameras. Results from this exploratory study showed that optical measurements are promising in terms of capturing small to large deformations and identifying various types of seismic damage.

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Strong Motion Measurement Using Security Video Cameras

Cited by 6 publications

References 5 publications

Estimating Intensities and/or Strong Motion Parameters Using Civilian Monitoring Videos: The May 12, 2008, Wenchuan Earthquake

Estimating Intensities and/or Strong Motion Parameters Using Civilian Monitoring Videos: The May 12, 2008, Wenchuan Earthquake

Vision-Based Measurements for Seismic Damage Monitoring

Monitoring of earthquake induced motions and damage with optical motion tracking

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