A method and system for easily predicting a remaining lifetime of a hose are provided. A hose remaining lifetime prediction method and a hose remaining lifetime prediction system, for predicting a remaining lifetime of a hose 1 in use, include obtaining in advance, for a hose of the same type, relationship between use time of an inner tubular rubber layer 11 at a reference temperature and a physical property value of rubber forming the inner tubular rubber layer 11, generating a thermal degradation model for the inner tubular rubber layer 11, calculating, for the hose 1 in use, reference temperature use time being use time of the inner tubular rubber layer 11 at the reference temperature until a time of the prediction, and predicting the remaining lifetime of the hose 1 in use, based on comparison between the reference temperature use time and the thermal degradation model.

A methods and systems for determining a change in condition of a rock bolt. Some methods may comprise, at a first point in time, propagating shear and longitudinal ultrasonic waves along the rock bolt to measure a first time of flight for each of the shear and longitudinal waves, at a second point in time after the first point in time, propagating shear and longitudinal ultrasonic waves along the rock bolt to measure a second time of flight for each of the shear and longitudinal waves, and using the relative changes of the first and second time of flights, determining the change in condition of the rock bolt section.

A condition of at least one structural part (11′, 11″) of a working machine (10) is determined by detecting (201) a force of a changing magnitude to a first structural part (11′) or a structural part connecting the first structural part (11′) to the second structural part (11″), determining (203) a change in the position of the first structural part with respect to the second structural part as a function of the force detected, and determining (205) the condition on the basis of the change in the position of the first structural part with respect to the second structural part as a function of the force detected. At least a slope of the change in the magnitude of the force is detected.

A method for determining road loads includes preparing a road map (15) that contains information about the local configuration of a plurality of roads. For each of a plurality of vehicles (1) a vehicle location is determined and at least one vehicle location signal (So) that characterizes the location of the vehicle concerned is generated. Using the vehicle location signal (So) and the road map, the vehicles (1) are assigned to the roads. For each vehicle (1) a vehicle load mass is determined and at least one vehicle load mass signal (Sm) that characterizes the vehicle load mass is generated. At least one road loading signal (Sb) that characterizes a road load is generated for each road using the vehicle load mass signals (Sm) of the vehicles (1) assigned to it.

A movable system for automatically monitoring the correlated wind and temperature filed of a bridge, including a bridge monitoring subsystem, a cloud server, and a client. The system monitors the meteorological parameters of a bridge surface and a temperature of a bridge structure, performs data analysis and processing on a cloud server, and performs visual data interaction by using a client. A bridge surface-specific meteorological parameter monitoring module is movable, such that the location of the sensor for meteorological data monitoring can be adjusted at any time to monitor an entire bridge deck in a time-sharing manner. A lower cantilever structure has an adjustable height, such that the sensor for meteorological data monitoring can track a height of a boundary layer of the bridge surface. A bridge structure-specific temperature monitoring module adopts distributed patch-type temperature sensors, which can detect the temperature of the bridge structure in all directions.

A monitoring system according to one aspect of the present disclosure includes: a sensor to measure physical quantities at one or a plurality of measurement points of a structural body; processing circuitry configured to acquire measured values from the measurer; a memory to store the measured values acquired from the measurer; and a data storage that, when one or some of the measured values stored in the memory satisfy a predetermined trigger condition, and as a result, it is determined that the structural body has received impact, records a group of data of the measured values which are within a certain time range and include the measured value based on which it is determined that the trigger condition is satisfied.

A multi-dimensional space load and fire test system for a tunnel structure, which includes a multi-point loading self-balancing reaction force system having a rigid platform, two furnace body side-sealing apparatuses (22) and a model assembly and transport apparatus (23) for transporting and situating a tunnel model are on a track on the rigid platform (9), the two furnace body side-sealing apparatuses (22) are respectively used for sealing two end openings of the tunnel model, a tower-type combustion vehicle can be placed within an inner cavity of the tunnel model, a plurality of sets of evenly distributed self-adaptive loading apparatuses (3) used for exerting loading forces on an outer wall of the tunnel model are connected between two reaction force frames (1) of the multi-point loading self-balancing reaction force system. The present system is able to perform loading on tunnel models having different cross section shapes, can be adapted to testing requirements of tunnel structures having different cross section shapes, and with respect to tunnel structure fire testing in particular, a camera of the present system has a large imaging angle of view, the present invention has good heat resistance, possesses both terminal imaging and distance measurement, and can amply satisfy a use requirement for the high temperature environment of a tunnel fire.

A method and a system for estimating state of wear of a cutting tool mounted on a machine tool. The system includes an acquisition module configured to acquire at least one operating signal specific to the cutting tool during at least one interaction of introduction or of extraction between the cutting tool and the material to be machined, and a microprocessor configured to generate from the at least one operating signal a wear signature of the cutting tool and to determine the state of wear of the cutting tool as a function of the signature.

An integrated rapid infrastructure monitoring system for identifying defects in an underlying surface, comprising: at least one actuator; and, at least one impactor operatively connected to the actuator, wherein the actuator is configured to transition the integrated rapid infrastructure monitoring system from a first configuration with at least one of a motive force and an impact bounce force of the impactor, where the impactor is located on a first side of the integrated rapid infrastructure monitoring system, to a second configuration, where the impactor is located on a second side of the integrated rapid infrastructure monitoring system.

The invention describes an electrical component (10) which at least comprises a section (12) configured as a sensor (sensor section) made of concrete and which contains electrically conductive aggregates (22) which are present in a region (24) near the surface of at least one outer surface (20) of the section (12) in a higher spatial density than in the remaining section (12). In addition, a method for its production and a use of the component (10) are described.