Abstract: A particle size of soil is measured, a color measurement value related to a color of the soil is measured, and corrosion of a steel material buried in the soil is estimated from the particle size and the color measurement value. In the measurement of the color measurement value, a color value is measured as the color measurement value. In the corrosion estimation, a corrosion rate is obtained from the measured particle size, a corrosion rate magnification is obtained from the measured color measurement value, a corrected corrosion rate is obtained by multiplying the corrosion rate by the corrosion rate magnification, and the corrosion of the steel material is estimated according to the obtained corrected corrosion rate.

Abstract: Provided are a light source that radiates (projects) infrared rays to a surface of a coating film which is an observation target, an infrared camera that captures a thermal image (infrared image) of a place irradiated with the infrared rays, and a display unit that displays the thermal image captured by the infrared camera. The thermal image captured by the infrared camera and displayed on the display unit is an image virtualized by superimposing a state (temperature distribution) of an infrared ray emitted from an object (for example, a coating film of a building) on which the infrared ray is projected in the shape of the object.

Abstract: A corrosion amount estimation apparatus that estimates the corrosion amount of a metal material buried in the ground, the apparatus including: a soil adjustment unit that dries the target soil; a water permeability measurement unit that measures the water permeability of the soil after supplying water to the dried soil; and a corrosion estimation unit that estimates the corrosion amount of the metal material when buried in the soil using the water permeability.

Abstract: An occluded hydrogen content estimation method implemented by an occluded hydrogen content estimation device performs an occluded hydrogen content estimation step in which, based on an occluded hydrogen unit content which is a content of hydrogen occluded in a metal due to a change in humidity from a wet state to a dry state, a period after the metal is placed, and meteorological data corresponding to the period for an area where the metal is located, a content of occluded hydrogen that is absorbed in the metal for the period after the metal is placed is estimated. In the occluded hydrogen content estimation step, the occluded hydrogen content is estimated by multiplying the number of rainfalls in the meteorological data by the occluded hydrogen unit content.

Abstract: A looseness detection sensor for detecting looseness of a bolt for fixing a component, including: a resonance unit arranged adjacent to a head portion of the bolt and made of an insulating material confining a high-frequency signal input externally; and a conductive member in conduction with the component across the resonance unit, wherein the conductive member is a cap put on the head portion of the bolt and includes a protrusion contacting a surface of the component.

Abstract: A tire with a built-in antenna includes a radio wave transmissive resin filled in the tire and an antenna arranged in the radio wave transmissive resin, and the antenna transmits a radar wave when an antenna surface of the tire facing a radiation surface of the antenna comes into contact with a ground surface.

Abstract: A coating material includes a base material having a sheet-like or plate-like shape, and a non-adhesive layer and an adhesive layer formed on one surface of the base material. The base material is formed with a material that prevents intrusion of an ultraviolet ray. The non-adhesive layer is formed with a material that does not have adhesiveness to a polymer material, and is formed in a first region of one surface of the base material. The adhesive layer includes a material having adhesiveness to a polymer material, and is formed in a second region in which the first region of the one surface of the base material is interposed.

Abstract: To repair reinforced concrete easily and at low cost. An anticorrosion method includes infiltrating an anticorrosion solution held inside concrete of reinforced concrete into a vicinity of a reinforcing bar through the concrete to passivate the reinforcing bar, detecting that the anticorrosion solution is infiltrated to a surface of the concrete, and discharging, after detecting the anticorrosion solution, the anticorrosion solution to outside of the concrete to form an anticorrosive coating on a surface of the reinforcing bar.

Abstract: A correlation between environment data at a buried location and magnitude of a corrosion rate of each of a plurality of corrosion samples is obtained. A score based on the magnitude of the corrosion rate is set for the environment data at the buried location of each of the plurality of corrosion samples on the basis of the correlation between the environment data and the magnitude of the corrosion rate. The score set for the environment data is set as a score of the plurality of corresponding corrosion samples. A risk of corrosion of a metal structure to be buried in the buried locations of the plurality of corrosion samples is estimated on the basis of the score set.

Abstract: A micro-diaphragm pump includes a main body, a pump chamber, a diaphragm, a first electrode and a second electrode. The diaphragm is constituted of a crystal material having an electrostrictive effect. The diaphragm can be constituted of a transparent crystal material having an electrostrictive effect. The diaphragm can be constituted of either a cubic KTN [KTa1-?Nb?O3 (0<?<1)] crystal or a lithium-added cubic KLTN [K1-?Li?Ta1-?Nb?O3 (0<?<1, 0<?<1)] crystal.

Abstract: The corrosion estimation device includes a sensor, a first processing circuit, a second processing circuit, and a third processing circuit. The sensor measures a water content of soil of a target land. The first processing circuit estimates a damping function representing a temporal change in a ratio of an area wetted with water on a surface of a metal structure buried in the target land on the basis of a water content measurement value measured by the sensor. The second processing circuit estimates, from the estimated damping function, a rate increase function that increases the corrosion rate of the metal structure, the rate increase function being derived from a thickness of a water film formed on the surface of the metal structure. The third processing circuit estimates a temporal change function of the corrosion rate given by a product of the damping function and the rate increase function.

Abstract: A loosening detection device according to the present embodiment includes multiple washers having holes that allow bolts to pass therethrough, and including metals insulated from each other, a transmission line that electrically connects between the metals and between the metals of the washers, and a transmission line that includes a terminal pair at one end thereof, and that has the other end electrically connected to the metals of the washer. A resonance frequency is measured from the terminal pair to detect loosening of the bolts on the basis of a change in the resonance frequency.

Abstract: To improve the accuracy of estimating when a fracture occurred in the metal material. In the estimation apparatus, the fracture temperature estimation unit performs estimate calculation of the fracture temperature of a fractured metal material from the hydrogen embrittlement rate of the fractured metal material, the fracture occurrence time narrowing unit performs calculation by using the temperature information of the installation environment in which the fractured metal material is installed and narrow down the period during which the fracture temperature is obtained as the fracture occurrence period of the metal material, and the fracture time estimation unit performs estimate calculation of the timing of when stress was applied to the fractured metal material during the fracture occurrence period as the timing of when a fracture occurred in the metal material.

Abstract: An object is to support evaluation of corrosion of metal embedded in the ground such that the corrosion can be evaluated with high accuracy even if any type of soil is used. A coarseness/fineness test unit analyzes soil particles of soil that is used to evaluate corrosion of an embedded metallic material, a water supply unit supplies water to the soil, a soil stirring unit stirs the soil supplied with water, and a viscosity test unit measures fluidity of the stirred soil.

Abstract: A looseness detection structure includes: a structure (transducer) T which is formed on a surface of a cable; a screw which tightens and fixes the cable in contact with the structure T; and a terminal (detection unit) which transmits a transmission signal to the structure T, receives a reception signal returning after propagating through the structure T, and detects the loosening of the screw based on a change in the reception signal.

Abstract: A bolt tightening torque management structure for a bolt for fastening a component includes: the bolt including a plurality of projections of different heights on a bearing surface of a head; a non-conductive film that is formed on the surface of the component, has a shaft hole through which a shaft of the bolt extends, and has a predetermined size; and a conductive film that has the shaft hole and a plurality of grooves, through which the projections extend, is formed on the non-conductive film, and has the same planar shape as the non-conductive film. The projections other than the projection having the smallest height are configured to be in contact with the surface of the component when the tightening torque of the bolt is appropriate. The base of each projection has a width dimensioned to close the corresponding groove.

Abstract: A repair apparatus for repairing damaged reinforcing bars in a structure includes a strip-shaped conductor including conductive wires arranged in a height direction, the conductive wires being arranged in parallel, a high-frequency current generation unit configured to supply a high-frequency current between the conductive wires of a first end side of the conductor and the conductive wires of a second end side of the conductor, and a connection body configured to connect the conductive wires to each other and connect the first end side and the second end side of the conductor so that the conductive wires form a coil, and the high-frequency current generation unit supplies a high-frequency current between a conductive wire at an upper end or a lower end of the first end side of the conductor and a conductive wire at a lower end or an upper end of the second end side of the conductor.

Abstract: A sensor for detecting looseness of a plurality of bolts and nuts fixing parts includes: a non-conductive film attached to a surface of the part, which is one of the parts, including holes H from which the bolts are inserted; and a conductive film attached to the non-conductive film, configured to receive supply of a high-frequency signal, and having a same planar shape as that of the non-conductive film, wherein the planar shape is a shape in which a resonance frequency of the high-frequency signal confined in the non-conductive film is different according to a position of a loosened bolt, and the planar shape of the conductive film is a shape in which a distance between a bolt and an end portion of the conductive film is different for each of the plurality of bolts.

Abstract: Reinforced concrete is protected from corrosion without conducting an operation involving exposure of rebar. A reinforced concrete structure is provided with a storage part that is formed inside concrete of the reinforced concrete structure, and that retains an anticorrosion solution. The anticorrosion solution diffuses and permeates through the concrete from the storage part, prevents the concrete in the vicinity of rebar from drying, and passivates the rebar.

Abstract: A transducer includes a conductive sheet installed on a sheath of a cable, an insulative sheet installed on the conductive sheet, holes being formed in predetermined positions of the insulative sheet, and a conductive sheet installed on the insulative sheet, holes being formed in predetermined positions of the conductive sheet. The transducer has structure in which, when the cable is tightened by the screw from the top of the conductive sheet and fixed, the distal end of the screw comes into contact with the conductive sheet passing through the holes formed in the insulative sheet and the conductive sheet, and the conductive sheet and the conductive sheet are electrically connected.