Novel Method for Interstory Drift Measurement of Building Frames Using Laser-Displacement Sensors

Islam, Md. Sakinul; Zareie, Shahin; Alam, M. Shahria; Seethaler, Rudolf

doi:10.1061/(asce)st.1943-541x.0001471

Cited by 15 publications

(14 citation statements)

References 4 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…It can be concluded that the precision of the smartphone is lower than Kanekawa et al, 6 Matsuya et al, 7 and Matsuya et al, 8 but higher than Islam et al, 5 and Dai et al 10 The advantages of using a smartphone include the low cost, convenience, and large measurement range. However, they also have a relatively low precision and sampling rate.…”

Section: Sensor Comparisonmentioning

confidence: 95%

“…As these disadvantages impact the ability to accurately monitor displacement, many instruments have been developed to monitor interstory drift directly. These include the laser‐based method, a laser light source and phototransistor array, a light‐emitting diode array and position‐sensitive detector unit, and consumer grade digital cameras . However, these methods require professional instruments, which significantly affect the cost.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Measuring the interstory drift of buildings by a smartphone using a feature point matching algorithm

Xie

Zhao

2020

Struct Control Health Monit

View full text Add to dashboard Cite

Summary When an earthquake strikes an area, unless the local infrastructure has a structural health monitoring system, it is difficult to obtain its health condition due to a lack of data. A smartphone could be competently used for many monitoring tasks to gather large amounts of data at a low cost. In this study, a smartphone is used as a sensor to obtain the interstory drift of buildings by recording a video of the ceiling with the front camera using a feature point matching algorithm. In addition, static and dynamic tests were carried out. In the static tests, the precision and error were investigated and compared with the reference sensor. In the dynamic tests, the displacement under a seismic wave was acquired by a smartphone and compared with the reference sensor, and the illumination condition was varied to test the robustness of the algorithm. The results indicated that feature point matching was suitable for calculating the displacement, and the smartphone was competent in monitoring the interstory drift during an earthquake.

show abstract

Section: Sensor Comparisonmentioning

confidence: 95%

Section: Introductionmentioning

confidence: 99%

Measuring the interstory drift of buildings by a smartphone using a feature point matching algorithm

Xie

Zhao

2020

Struct Control Health Monit

View full text Add to dashboard Cite

show abstract

“…Optical techniques have been investigated by a number of researchers [11][12][13][14], but as yet without the system level development necessary to enable broad transition into practice. For example, Chen et al [13] proposed a technique that relies on a laser beam projected from ceiling to floor onto an arrangement of four position sensitive detectors, which yield a measure of ID in three directions.…”

Section: Introductionmentioning

confidence: 99%

“…However, no experimental evidence of the system performance under dynamic loading and on realistic structures experiencing earthquake-induced displacements is provided. More recently, Islam et al [14] have explored a laser-based technique to measure ID. It consists of a laser pointing at an inclined reflecting surface, in which the change of distance between the vertical laser source and the reflecting surface caused by the horizontal displacement of the floor is geometrically translated into ID.…”

Section: Introductionmentioning

confidence: 99%

Direct measurement of building transient and residual drift using an optical sensor system

Petrone

McCallen

Buckle

et al. 2018

Engineering Structures

View full text Add to dashboard Cite

Interstory drift (ID) is a key response parameter for buildings subjected to lateral loads and is used to define performance-based limit states, allowable deformations and damage states in a number of seismic design codes and standards. An ability to rapidly and accurately measure both transient and residual ID during an earthquake would provide important observables for understanding the seismic demands and post-earthquake condition of a building. Accurate retrieval of ID from accelerometer-based instrumentation systems can be very challenging, if not impossible, as a result of instrumentation limitations and the post-processing associated with strong motion accelerometer data. This is particularly true for the case in which residual drifts occur during inelastic building response. In the study presented herein, a newly developed optical sensor system, designed specifically for directly measuring both transient and residual ID, was experimentally evaluated through shake table testing and computational simulations. The ability of the sensor to accurately measure ID is demonstrated and key operational considerations for sensor system deployment are examined through a model-based investigation.

show abstract

“…Different from [11,12], the measuring unit utilizes the layout of pneumatic micrometer, and this arrangement cannot be affected by dynamic factors. To overcome the short range of pneumatic micrometer, LTSs [20,21,22], which have the advantage of high accuracy and wide measuring range, are employed in our system to acquire raw data. The measuring principle of LTS is introduced in Section 2.…”

Section: Introductionmentioning

confidence: 99%

A Laser-Based Measuring System for Online Quality Control of Car Engine Block

Wang

2016

Sensors

View full text Add to dashboard Cite

For online quality control of car engine production, pneumatic measurement instrument plays an unshakeable role in measuring diameters inside engine block because of its portability and high-accuracy. To the limitation of its measuring principle, however, the working space between the pneumatic device and measured surface is too small to require manual operation. This lowers the measuring efficiency and becomes an obstacle to perform automatic measurement. In this article, a high-speed, automatic measuring system is proposed to take the place of pneumatic devices by using a laser-based measuring unit. The measuring unit is considered as a set of several measuring modules, where each of them acts like a single bore gauge and is made of four laser triangulation sensors (LTSs), which are installed on different positions and in opposite directions. The spatial relationship among these LTSs was calibrated before measurements. Sampling points from measured shaft holes can be collected by the measuring unit. A unified mathematical model was established for both calibration and measurement. Based on the established model, the relative pose between the measuring unit and measured workpiece does not impact the measuring accuracy. This frees the measuring unit from accurate positioning or adjustment, and makes it possible to realize fast and automatic measurement. The proposed system and method were finally validated by experiments.

show abstract

Novel Method for Interstory Drift Measurement of Building Frames Using Laser-Displacement Sensors

Cited by 15 publications

References 4 publications

Measuring the interstory drift of buildings by a smartphone using a feature point matching algorithm

Measuring the interstory drift of buildings by a smartphone using a feature point matching algorithm

Direct measurement of building transient and residual drift using an optical sensor system

A Laser-Based Measuring System for Online Quality Control of Car Engine Block

Contact Info

Product

Resources

About