A real-time measurement system for mechanical parameters of rock slag during excavation includes a rock slag conveyor belt configured to convey rock slag; cleaning device, located on both sides of the rock slag conveyor belt, configured to clean the rock slag; an image acquisition device, located behind the cleaning device and on both sides and above the rock slag conveyor belt, configured to collect images of rock slag; an on-site loading device, for conducting on-site mechanical loading procedure on the rock slag to obtain on-site mechanical parameters. The on-site loading device includes a loading bottom plate, a push plate and a pressure head. The loading bottom plate is provided with a loading area. The push plate is located on the loading bottom plate and pushed by a pushing mechanism to push the rock slag.

A material testing apparatus comprising a frame having three or more tracks, and a plurality of mounts positioned within the three or more tracks. The mounts including an attachment mechanism to attach the mounts to a material being tested. The mounts including a force measurement elements. Some of the mounts free mounts that move in a track slot within the track, the free mounts free to move to any position within the track slot. The apparatus further comprising a data collector to collect data from the force measurement elements in the mounts when the material is placed under stress, to characterize the material.

A method of inspecting a secondary bond of a laminated part includes positioning the laminated part within a sealed chamber. The method also includes reducing a pressure within the sealed chamber to below a pressure outside the sealed chamber when the laminated part is positioned within the sealed chamber. The method further includes, when the pressure within the sealed chamber is reduced to below the pressure outside the sealed chamber, measuring a gradient of change of a surface profile of the laminated part. The method additionally includes determining a condition of the secondary bond based on the gradient of change of the surface profile of the laminated part.

In this invention, a displacement gauge (40) comprises a first camera (41) that has a telecentric lens and photographs a test piece (11) and a second camera (42) that has a wide-angle lens and photographs the test piece (11) with a wider field of view than the photographic field of view of the first camera (41). The first camera (41) and second camera (42) are video cameras having imaging elements and transmit images acquired through photography at a prescribed frame rate (fps) to a personal computer (33). During photography by the first camera (41) and second camera (42), the test piece (11) is illuminated using a light (43).

An observable micro-nano mechanical testing apparatus and an observable micro-nano mechanical testing method are provided. The apparatus includes a supporting component, a driving component, a bearing component and an imaging component. The driving component and the imaging component are respectively vertically arranged on the supporting component, the bearing component is horizontally arranged on the supporting component and positioned below the driving component and the imaging component, the bearing component is used for bearing a sample and moving the sample, the driving component is used for driving an indenter to apply loads on the sample so as to form an indentation on the sample, and the imaging component is used for observing and analyzing the indentation on the sample.

Systems and methods for testing a surface are described. An apparatus can be configured to consistently strike a ball to maintain consistent testing conditions. One or more parameters may be determined based on a path of travel of the ball.

A discontinuous deformation measurement method based on infrared and visible light cameras may include: preparing a conductive film and a random speckle pattern on a surface of the conductive film; obtaining a visible image and an infrared image under a loading stage; applying a crack boundary detection to the visible image to obtain an initial coordinate of a micro-crack, determining an range of the micro-crack based on a temperature-rising region from the infrared image and the initial coordinate; setting a position corresponding to the range of the micro-crack in the visible image as a new region of interest; obtaining full-field principal tensile strains by a DIC method, and locating an accurate boundary of the micro-crack based on gradient distribution of the full-field principal tensile strains; analyzing displacement and strain fields around the micro-crack using the DIC method.

Novel markers that can be attached physically to a tensile specimen with a center guide to allow for measuring correct strain, as well as a binder that fixes and holds a pin guide to its location on the specimen during the test.

Disclosed are a testing system and method under fluid-solid coupling effects. A dynamic stress field during fluid flow, deformation of a porous rock framework, real-time evolution of the stress field and deformation of a fluid-solid interface under fluid-solid coupling effects can be obtained, on the basis of a collected photo-elastic stripe image and a surface deformation image. A stress field of a solid framework and fluid in porous rock, and a strain field of the solid framework and the fluid-solid interface under fluid-solid coupling effects can be visually and quantitatively displayed by means of a display device.

A tension load fixture for applying tension or loading forces to a specimen comprises a pair of tension arms and an imaging device. The pair of tension arms are configured to releasably couple to opposite end regions of a specimen and to apply tension or loading forces to the specimen. The specimen is configured to be positioned between the pair of tension arms and defines a notch between the opposite end regions of the specimen. The notch extends from a side of the specimen to a middle region of the specimen. The imaging device is configured to capture one or more images of the middle region of the specimen and is configured to rotate about a central axis of the tension load fixture that is proximate to the middle region of the specimen to facilitate generation of a three-dimensional image of the middle region of the specimen as the specimen is subjected to tension or loading forces.