A data collection system includes an information processing apparatus, and a communication node coupled to the information processing apparatus, wherein the information processing apparatus is configured to acquire a predetermined event occurrence time from a server, calculate an activation start time that is earlier than the acquired event occurrence time by an activation period of the communication node, and transmit the calculated activation start time to the communication node, and the communication node is configured to start activation at the activation start time received, and acquire predetermined data detected by a sensor upon completion of the activation, and transmit the acquired predetermined data to the information processing apparatus.

According to an embodiment, a structure evaluation system includes a plurality of sensors, a position locator, a velocity calculator, and an evaluator. The sensors detect an elastic wave generated from a structure. The position locator derives a wave source distribution of the elastic waves generated from the structure, on the basis of the elastic waves. The velocity calculator derives a propagation velocity of the elastic wave generated from the structure, on the basis of the elastic waves. The evaluator evaluates the soundness of the structure on the basis of the wave source distribution and the propagation velocity of the elastic waves.

A system for measuring, monitoring and controlling the performance of bridges and other infrastructure creates a database for analysis of real time performance and learning through adaptive algorithms allowing the performance to be analyzed over time and for changes in performance against the specific bridge or infrastructure and other bridges or infrastructure in the a network of such infrastructure.

An automatic wall climbing type radar photoelectric robot system for damages of a bridge and tunnel structure, mainly including a control terminal, a wall climbing robot and a server. The wall climbing robot generates a reverse thrust by rotor systems, moves flexibly against the surface of a rough bridge and tunnel structure by adopting an omnidirectional wheel technology, and during inspection by the wall climbing robot, bridges and tunnels do not need to be closed, and the traffic is not affected. Bridges and tunnels can divide into different working regions only by arranging a plurality of UWB base stations, charging and data receiving devices on the bridge and tunnel structure by means of UWB localization, laser SLAM and IMU navigation technologies, a plurality of wall climbing robots supported to work at the same time, automatic path planning and automatic obstacle avoidance realized, and unattended regular automatic patrolling can be realized.

A structure abnormality detection system that detects an abnormality of at least one of structures classified into a plurality of groups in which a plurality of factors that may affect behavior of structures are substantially the same includes: means for storing a model that predicts, from a first inspection value acquired at a first inspection position, a second inspection value acquired at a second inspection position that is a position where a vibration intensity in vibration of a predetermined vibration mode at a natural frequency of the structure is substantially the same as at the first inspection position; and means for detecting an abnormality of the structure by evaluating fidelity of the first inspection value and the second inspection value acquired at a particular time to the model.

A system for measuring movement of a structural component of a structure includes a projector which directs a laser or other trackable beam from an origin having a fixed location relative to the structure to a target surface configured to be fixed to the structural component. The beam strikes the target surface to produce a trackable spot at an incidence location on the target surface. A camera coupled to the target surface tracks the position of the incidence location as it moves on the target surface over time in response to relative movement between the structural component and the origin. A computer processor receives data from the camera and calculates the magnitude of movement of the structural component relative to the origin.

The present invention discloses a bridge inspection and evaluation method based on impact vibration. The method includes backward analysis of the bridge based on impact on blocks without reference points and forward analysis of the bridge based on progressive impact loading, where the backward analysis of the bridge based on impact on blocks without reference points is used to rapidly inspect the medium and small bridges from the road network to find the ones with serious shortage of bearing capacity, and the forward analysis of the bridge based on progressive impact loading is used to evaluate the actual bearing capacity of the bridges, which may have good safety condition in the backward analysis. The present invention realizes low-cost and highly efficient inspection and evaluation of the medium and small bridges in the road network.

A first radio frequency scan of a plurality of electronic circuit devices fixed to a structural component of a physical structure can be initiated. Data can be received from each electronic circuit device that is scanned, the data received from each electronic circuit device indicating a first measured electrical impedance of a respective conductor connected to the electronic circuit device and an identifier assigned to the electronic circuit device. For each of the plurality of electronic circuit devices that are scanned, the received data can be stored to a first memory. The data for the electronic circuit devices forms a baseline measurement of the electronic circuit devices to which impedance data gathered from subsequent radio frequency scans of the electronic circuit devices is compared to determine whether any of the conductors of the electronic circuit devices have deformed or broken.

A non-contact non-destructive inspection system according to an embodiment includes a sensor, a velocity detection unit, and a damage detection unit. The sensor detects a second elastic wave emitted to a medium surrounding an inspection object due to a first elastic wave propagating through the inspection object. The velocity detection unit detects a velocity of the first elastic wave based on a wavefront angle of the second elastic wave and a velocity of the second elastic wave. The damage detection unit detects damage to the inspection object based on the velocity of the first elastic wave.

An experimental setup for three-degree-of-freedom large-amplitude free vibration in wind tunnel test. The setup includes a rigid test model, rigid circular rods, rigid lifting arms, arc blocks with grooves, lightweight high-strength thin strings, linear tensile springs, fixed pulleys, and bearings. Large-amplitude three-degree-of-freedom free vibrations of test models can be adapted by the vertical deformation of the springs without any tilt. The possible nonlinear mechanical stiffness due to vertical spring tilt and lateral spring deflection in the traditional setup are excluded. It is convenient to install the test model and adjust the initial angle of attack in the new experimental setup. The linear stiffness property and hence constant vibration frequency can be ensured for very large-amplitude vibrations due to the eliminations of spring deflection and tilt.