Determining a health condition of a structure
First Claim
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1. A computer-implemented method, comprising:
- monitoring a building structure by constantly or regularly performing the steps of;
receiving or accessing vibration data of a part of the structure, the vibration data being measured by two or more accelerometers and, the vibration data representing acceleration of the part of the structure substantially caused by an external vibration source;
transforming the vibration data by aligning an axis direction of the vibration data from each of the two or more accelerometers with a direction corresponding to maximum variance of the vibration data to create calibrated vibration data;
extracting an amplitude for a frequency of the calibrated vibration data based on frequency analysis of the calibrated vibration data; and
determining a health condition of the part of the structure by a support vector machine classifier based on the amplitude for the frequency.
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Abstract
The disclosure relates to structural health monitoring (SHM). In particular determining a health condition of a structure, such as a bridge, based on vibration data measured of the bridge. Measured vibration data is calibrated (410-450). Features are then extracted from the calibrated data (610-630) and a support vector machine classifier is then applied (720) to the extracted features to determine (730) the health condition of a part of the structure. Training of the support vector machine classifier by a machine learning process (910) is also described.
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Citations
14 Claims
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1. A computer-implemented method, comprising:
monitoring a building structure by constantly or regularly performing the steps of; receiving or accessing vibration data of a part of the structure, the vibration data being measured by two or more accelerometers and, the vibration data representing acceleration of the part of the structure substantially caused by an external vibration source; transforming the vibration data by aligning an axis direction of the vibration data from each of the two or more accelerometers with a direction corresponding to maximum variance of the vibration data to create calibrated vibration data; extracting an amplitude for a frequency of the calibrated vibration data based on frequency analysis of the calibrated vibration data; and determining a health condition of the part of the structure by a support vector machine classifier based on the amplitude for the frequency. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A system for determining a health condition of a part of a structure, the system comprising:
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two or more accelerometers providing vibration data, a processor configured to monitor a building structure by constantly or regularly performing the steps of; receiving or accessing the vibration data of the part of the structure, the vibration data being measured by the two or more accelerometers, the vibration data representing acceleration of the part of the structure substantially caused by an external vibration source; transforming the vibration data by aligning an axis direction of the vibration data from each of the two or more accelerometers with a direction corresponding to maximum variance of the vibration data to create calibrated vibration data; extracting an amplitude for a frequency of the calibrated vibration data based on frequency analysis of the calibrated vibration data; and determining the health condition of the part of the structure by a support vector machine classifier based on the amplitude for the frequency.
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12. A computer-implemented method for training a support vector machine classifier, the method comprising:
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monitoring a building structure by constantly or regularly performing the steps of; receiving or accessing vibration data of one or more parts of one or more structures measured by two or more accelerometers, the vibration data representing acceleration of the part of the structure substantially caused by an external vibration source; transforming the vibration data by aligning an axis direction of the vibration data from each of the two or more accelerometers with a direction corresponding to maximum variance of the vibration data to create calibrated vibration data; extracting two or more amplitudes for a frequency of the calibrated vibration data based on frequency analysis of the calibrated vibration data; and applying a machine learning process to determine the support vector machine classifier based on the two or more amplitudes for a frequency. - View Dependent Claims (13)
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14. A system for training a support vector machine classifier for use in determining a health condition of a part of a structure, the system comprising:
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two or more accelerometers providing vibration data of the part of the structure, a processor configured to monitor a building structure by constantly or regularly performing the steps of; receiving or accessing the vibration data of the part of the structure, the vibration data being measured by the two or more accelerometers, the vibration data representing acceleration of the part of the structure substantially caused by an external vibration source; transforming the vibration data by aligning an axis direction of the vibration data from each of the two or more accelerometers with a direction corresponding to maximum variance of the vibration data to create calibrated vibration data; extracting two or more amplitudes for a frequency of the calibrated vibration data based on frequency analysis of the calibrated vibration data; and applying a machine learning process to determine the support vector machine classifier based on the two or more amplitudes for a frequency.
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Specification