Measurement method, measurement device, measurement system, and measurement program
View Patent ↗A measurement method includes: a physical quantity acquisition step of acquiring, based on observation information obtained by at least one observation device that observes first to N-th observation points of a structure arranged along a second direction intersecting a first direction in which a moving object moves along the structure, physical quantities at the first to N-th observation points; and an action calculation step of calculating actions x 1 to x N on the first to N-th observation points based on the acquired physical quantities at the first to N-th observation points, on the assumption that, when a function indicating a correlation between an action x j on a j-th observation point and an action that the action x j has on an i-th observation point is set as y ij , an acquired physical quantity at the i-th observation point is equal to a sum of values of functions y i1 to y iN .
1. A measurement method comprising:
a physical quantity acquisition step of acquiring, based on observation information obtained by at least one observation device that observes first to N-th observation points of a structure arranged along a second direction intersecting a first direction in which a moving object moves along the structure, physical quantities at the first to N-th observation points, N being an integer of 2 or more; and
an action calculation step of calculating actions x 1 to x N on the first to N-th observation points based on the physical quantities at the first to N-th observation points acquired in the physical quantity acquisition step, on the assumption that, for any integer i of 1 or more and N or less and any integer j of 1 or more and N or less, when a function indicating a correlation between an action x j on a j-th observation point and an action that the action x j has on an i-th observation point is set as y ij , a physical quantity at the i-th observation point acquired in the physical quantity acquisition step is equal to a sum of values of functions y i1 to y iN .
2. The measurement method according to claim 1 , further comprising:
a coefficient value calculation step of acquiring physical quantities at the first to N-th observation points when a known moving object different from the moving object moves alone on the structure, and calculating a value of a coefficient of the function y ij based on the physical quantities at the first to N-th observation points.
3. The measurement method according to claim 1 , wherein the function y ij is a polynomial function of the action x j .
4. The measurement method according to claim 1 , wherein the structure has first to N-th paths through which the moving object is able to move, and
the first to N-th observation points are associated with the first to N-th paths.
5. The measurement method according to claim 1 , wherein the physical quantities at the first to N-th observation points acquired in the physical quantity acquisition step are displacements or loads generated by the moving object.
6. The measurement method according to claim 1 , wherein the observation device is an acceleration sensor.
7. The measurement method according to claim 1 , wherein the observation device is a contact displacement meter, a ring displacement meter, a laser displacement meter, a pressure sensor, a displacement measurement device based on image processing, or a displacement measurement device based on an optical fiber.
8. The measurement method according to claim 1 , wherein
the physical quantities at the first to N-th observation points acquired in the physical quantity acquisition step are physical quantities in a third direction intersecting the first direction and the second direction.
9. The measurement method according to claim 1 , wherein
the moving object is a railroad vehicle, an automobile, a tram, a construction vehicle, or a military vehicle.
10. The measurement method according to claim 1 , wherein
the structure is a superstructure of a bridge,
the superstructure is a structure across any one of a bridge abutment and a bridge pier adjacent to each other, two adjacent bridge abutments, or two adjacent bridge piers,
both end portions of the superstructure are located at positions of the bridge abutment and the bridge pier adjacent to each other, at positions of the two adjacent bridge abutments, or at positions of the two adjacent bridge piers, and
the bridge is a road bridge or a railway bridge.
11. The measurement method according to claim 1 , wherein the structure is a structure in which bridge weigh in motion (BWIM) functions.
12. A measurement device comprising:
a physical quantity acquisition unit that acquires, based on observation information obtained by at least one observation device that observes first to N-th observation points of a structure arranged along a second direction intersecting a first direction in which a moving object moves along the structure, physical quantities at the first to N-th observation points, N being an integer of 2 or more; and
an action calculation unit that calculates actions x 1 to x N on the first to N-th observation points based on the physical quantities at the first to N-th observation points acquired by the physical quantity acquisition unit on the assumption that, for any integer i of 1 or more and N or less and any integer j of 1 or more and N or less, when a function indicating a correlation between an action x j on a j-th observation point and an action that the action x j has on an i-th observation point is set as y ij , a physical quantity at the i-th observation point acquired by the physical quantity acquisition unit is equal to a sum of values of functions y i1 to y iN .
13. A measurement system comprising:
the measurement device according to claim 12 ; and
the observation device.
14. A non-transitory computer-readable storage medium storing a measurement program, the measurement program causing a computer to execute:
a physical quantity acquisition step of acquiring, based on observation information obtained by at least one observation device that observes first to N-th observation points of a structure arranged along a second direction intersecting a first direction in which a moving object moves along the structure, physical quantities at the first to N-th observation points, N being an integer of 2 or more; and
an action calculation step of calculating actions x 1 to x N on the first to N-th observation points based on the physical quantities at the first to N-th observation points acquired in the physical quantity acquisition step, on the assumption that, for any integer i of 1 or more and N or less and any integer j of 1 or more and N or less, when a function indicating a correlation between an action x j on a j-th observation point and an action that the action x j has on an i-th observation point is set as y ij , a physical quantity at the i-th observation point acquired in the physical quantity acquisition step is equal to a sum of values of functions y i1 to y iN .