Patent ID: 11867592
Assignee: NEC CORPORATION
Field: Measurement (Instruments)
Classification: CPC G  E | IPC G

Claim 6:
7. A non-transitory computer-readable recording medium on which storing a program executable by a processor to perform:
measuring, at each of a plurality of times over a period of time, a displacement amount generated on a measurement spot on a floor deck of a target bridge by a weight of a vehicle traveling on the target bridge, which is to be diagnosed, wherein the displacement amount is measured by analyzing time-series images of the measurement spot captured by a camera substantially immediately below the measurement spot;
a process of estimating, within the period of time, a section of time in which deflection of the target bridge occurred, based on the displacement amount measured at each of the plurality of times over the period of time;
detecting a number of maximal values and a number of minimal values of the displacement amount measured within the section of time;
in response to the number of maximal values being equal to one and the number of minimal values being equal to zero, corresponding the maximal value as the displacement caused by the weight of only the vehicle; and
generating a histogram of the displacement amount caused by the weight of only the vehicle; and
performing deterioration diagnosis of the target bridge based on the generated histogram, and output a result of the deterioration diagnosis.