Abstract: An abnormality determination system applicable to a work machine includes: a stereo camera 22 mounted on a wheel loader having working equipment 10; a position data calculation unit 83 that estimates a position of the working equipment 10 in a captured image of the stereo camera 22 based on a posture of the working equipment 10 when captured by the stereo camera 22; and a determination unit 91 that determines whether the stereo camera 22 is normal based on the estimated position of the working equipment 10.

Abstract: A detection device includes an acquirer that acquires a video of each of a plurality of bearings of a structure including the plurality of bearings, an extractor that extracts a dynamic feature corresponding to a plurality of degrees of freedom of each of the plurality of bearings based on the video, and an identifier that identifies, among the plurality of bearings, a bearing whose dynamic feature fails to match a dynamic feature of one or more other bearings of the plurality of bearings.

Abstract: A conversion parameter calculation method includes: obtaining, from an image capturing device, image data obtained by the image capturing device capturing an image of an object having attached thereto a marker with which specific coordinates are detectable; obtaining displacement direction information indicating a direction of a displacement of the object, the direction crossing an image capturing surface of the image capturing device; detecting specific coordinates, based on the marker included in the image data; estimating a position of the image capturing device, based on a result of the detection; calculating distance data indicating a distance from the image capturing device to the object, based on the position of the image capturing device; and calculating, using the distance data and the displacement direction information, a conversion parameter for converting a pixel displacement amount of the object into an actual displacement amount.

Abstract: A control system of a work machine includes: a three-dimensional measurement device 20 that measures a work target of a work machine 1; a detection device 25 that detects the work target; and a working equipment control unit 87 functioning as an intervention control unit that performs intervention control of the work machine 1 when both the three-dimensional measurement device 20 and the detection device 25 have detected the work target.

Abstract: A prediction device for predicting the growth direction of a crack that occurs in a subject includes: an obtainer that obtains video of the subject; a derivation unit that derives displacement of each of a plurality of regions in the obtained video; a selector that selects, from among the plurality of regions, two or more regions each having displacement similar to displacement of a reference region included in the plurality of regions; and an identification unit that identifies, as the growth direction, the longitudinal direction of a collective region made up of the two or more selected regions.

Abstract: A torsion beam is configured in an arch shape and comprised of an open cross-section member including an arch lower-half portion and an arch upper-half portion. A sectional shape of the arch lower-half portion in a cross section perpendicular to a longitudinal direction of the arch lower-half portion is configured to be substantially horizontal when a vehicle is in a standard state, and a central portion, in the vehicle width direction, of the torsion beam is configured such that a front edge portion of the arch lower-half portion and a front edge portion of the arch upper-half portion are located substantially at the same position in a vehicle longitudinal direction when the vehicle is in a full-rebound state. Thereby, the rigidity and the productivity can be endured, attaining low floor-level of the vehicle.

Abstract: A torsion beam is configured in an arch shape and comprised of an open cross-section member including an arch lower-half portion and an arch upper-half portion. A sectional shape of the arch lower-half portion in a cross section perpendicular to a longitudinal direction of the arch lower-half portion is configured to be substantially horizontal when a vehicle is in a standard state, and a central portion, in the vehicle width direction, of the torsion beam is configured such that a front edge portion of the arch lower-half portion and a front edge portion of the arch upper-half portion are located substantially at the same position in a vehicle longitudinal direction when the vehicle is in a full-rebound state. Thereby, the rigidity and the productivity can be endured, attaining low floor-level of the vehicle.

Abstract: Disclosed is a torsion beam type rear suspension which comprises a pair of right and left trailing arms (2), a torsion beam (3), and a spring seat (6) disposed in a corner region defined at a junction between each of the lateral ends of the torsion beam and a rear portion (2c) of a corresponding one of the trailing arms to form a mounting seat for a coil spring (8). A vertical flange (13) is formed along a laterally inner edge (12) of the spring seat to have a longitudinally front edge extending vertically along a rear side surface of the torsion beam. The spring seat has a first region (7b) of disposed opposed to the corresponding trailing arm and fixed thereto approximately in its entirety, and a second region (16) disposed opposed to the torsion beam and fixed thereto only through the vertical flange.