Measurement method, measurement device, measurement system, and storage medium
A measurement method and coefficient technology, applied in the direction of measuring devices, measuring vibration, vibration measurement in solids, etc., can solve problems such as calculating displacement and large integral error
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no. 1 approach
[0095] 1-1. Measurement system
[0096] Hereinafter, a measurement system for realizing the measurement method of the present embodiment will be described by taking, as an example, a case where the structure is the superstructure of a bridge and the moving body is a vehicle. Vehicles passing through the bridge according to this embodiment are heavy vehicles such as railway vehicles, automobiles, streetcars, construction vehicles, or military vehicles that can be measured by a bridge weighing in motion (BWIM: Bridge Weigh in Motion:) system. BWIM is a technology that regards the bridge as a "balance" and measures the deformation of the bridge to measure the weight and number of axles of vehicles passing through the bridge. The superstructure of a bridge that can analyze the weight of passing vehicles from the response of deformation, strain, etc. is a structure where BWIM functions, and the BWIM system that applies the physical process between the action and response of the sup...
no. 2 approach
[0400] The processing of the displacement waveform correction step of the measurement method of the second embodiment is different from that of the measurement method of the first embodiment. Hereinafter, regarding the second embodiment, the same reference numerals are attached to the same constituent elements as those of the first embodiment, and overlapping descriptions of the first embodiment are omitted or simplified, and the differences from the first embodiment are mainly described.
[0401] In the measurement method of the second embodiment, the approximate integral error u ε In the above equation (50) of the quadratic polynomial of (t), the coefficient b of the first-degree term and the coefficient c of the zero-degree term are sufficiently small to be regarded as zero with respect to the coefficient a of the quadratic term. Thus, the quadratic polynomial (50) is replaced with a quadratic polynomial (65) in which the coefficient b of the first-degree term and the coeff...
no. 3 approach
[0444] The processing of the displacement waveform correction step in the measuring method of the third embodiment is different from the measuring methods of the first and second embodiments. Hereinafter, regarding the third embodiment, the same reference numerals are attached to the same constituent elements as those of the first embodiment or the second embodiment, and descriptions that overlap with those of the first embodiment or the second embodiment are omitted or simplified. Differences between the first embodiment and the second embodiment will be described.
[0445] As shown in equation (76), at time t k , the arbitrary first scale factor d 1 and path deflection waveform CP j (t) Multiplied waveform d 1 CP j (t) and slave displacement waveform U j (t) The residual of the waveform after subtracting the first quadratic polynomial is set to e k1 . In other words, the residual e kl is the first scaling factor d in the 1 and path deflection waveform CP j (t) Mult...
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