Characterizing the decay of the microstructure of a drilling fluid gel using a model based on two exponential functions. Based on the model, identify at least two components of the decay model comprising a fast decay component and a slow decay component, wherein the fast decay component decays more quickly than the slow decay component. The decay of the microstructure of the gel over a time period can be determined using a rheometer or viscometer. Wellbore processes, including start up and tripping operations can be optimized based on the determination of the fast decay component and/or a slow decay component of the drilling fluid gel.

An apparatus and method for inspection of at least one of grass, artificial turf, infill, or dirt, on a surface, using optical photographic images from a camera and three-dimensional (“3D”) depth scans using the camera and one or more laser, to create a mask to distinguish aspects of the surface, so that the surface can be measured and analyzed.

Provided is a repeated moment generation device that includes: a principal shaft; principal bearing members; lever members; principal eccentric weight rotors; auxiliary eccentric weight rotors; and drive means (such as a motor) for causing the principal eccentric weight rotors and the auxiliary eccentric weight rotors to synchronously rotate. Eccentricity directions of the principal eccentric weight rotors are different from each other by 180 degrees around shaft centers of shaft bodies thereof, eccentricity directions of the auxiliary eccentric weight rotors are different from each other by 180 degrees around shaft centers of shaft bodies thereof, and the eccentricity direction of the principal eccentric weight rotor and the eccentricity direction of the auxiliary weight rotor located on the same side as the principal eccentric weight rotor with respect to the principal shaft 1 are different from each other by 180 degrees around the shaft centers of the shaft bodies thereof.

The present invention relates to a system and process carried out after a process of separating fragments of steel from pieces of ore that come out of a semi-autogenous grinder for grinding ores, and which consists of a system formed by one or more instruments for capturing images, each one being sensitive to light of different wavelengths, which point to the surface of an element for receiving the steel fragments or a channel that receives the steel balls and the fragments thereof from the separation process, through which the steel balls and fragments thereof move when they are discharged from this process, with the possibility of directing each image sensor such that it is not parallel to the others.

By digitally processing the images obtained with the one or more sensors, the dimensions and morphology of the balls and ball fragments discharged from the separation process can be determined.

A pin-on-plate friction and wear test device includes a high temperature heating chamber and a cooling pin. The high temperature heating chamber is fastened horizontally to the mobile base. The axis of the cooling pin is perpendicular to the upper surface of the mobile base. The electric resistance heating plate is located in the bottom closed space under the friction sample plate in the high temperature heating chamber. The electric resistance heats the fixed sample to experiment temperature. The inner layout of pin is a circling cooling channel where the cooling medium adjusts and cools the temperature of the sample. Thermocouples are separately distributed in the temperature measuring groove of the high temperature heating chamber and the temperature measuring hole of the cooling pin for real-time temperature measurement. The device can simulate the friction and wear properties of the high-strength steel plate and hot-stamping die in the differential temperature environment.

A pin-on-plate friction and wear test device includes a high temperature heating chamber and a cooling pin. The high temperature heating chamber is fastened horizontally to the mobile base. The axis of the cooling pin is perpendicular to the upper surface of the mobile base. The electric resistance heating plate is located in the bottom closed space under the friction sample plate in the high temperature heating chamber. The electric resistance heats the fixed sample to experiment temperature. The inner layout of pin is a circling cooling channel where the cooling medium adjusts and cools the temperature of the sample. Thermocouples are separately distributed in the temperature measuring groove of the high temperature heating chamber and the temperature measuring hole of the cooling pin for real-time temperature measurement. The device can simulate the friction and wear properties of the high-strength steel plate and hot-stamping die in the differential temperature environment.

A horizontal jet-mechanical combined rock breaking test device and method. The device includes a horizontal base. One end of the horizontal base is provided with a multi-mode cutter head. A jet-mechanical combined cutter is provided on the multi-mode cutter head. The other end of the horizontal base is provided with a surrounding rock stress simulation bin for loading a rock sample. The multi-mode cutter head is connected to a driving mechanism, and the multi-mode cutter head is configured to advance and rotate horizontally along the horizontal base under the action of the driving mechanism, so that the jet-mechanical combined cutter is capable of acting on the rock sample.

An automatic test system and method for mechanical parameters of surrounding rock applicable to a TBM. The system includes: an aggregate portion collecting a rock slag in a TBM tunneling process in real time; a gripping portion gripping any rock slag from obtained rock slags; a visual processing apparatus performing three-dimensional imaging for a rock slag under test in an infrared ranging manner; calculating positions of loading points for an abrasiveness test experiment, and determining, based on a spacing between loading points, whether rock slag under test meets a requirement; and determining actual positions of loading points if the rock slag under test meets the requirement, and determining a region, on a surface of rock slag, that meets a set condition as an action region for abrasiveness test experiment; and a rock abrasiveness test apparatus automatically performing an abrasiveness test for a rock slag under test that meets a requirement.

An automatic test system and method for mechanical parameters of surrounding rock applicable to a TBM. The system includes: an aggregate portion collecting a rock slag in a TBM tunneling process in real time; a gripping portion gripping any rock slag from obtained rock slags; a visual processing apparatus performing three-dimensional imaging for a rock slag under test in an infrared ranging manner; calculating positions of loading points for an abrasiveness test experiment, and determining, based on a spacing between loading points, whether rock slag under test meets a requirement; and determining actual positions of loading points if the rock slag under test meets the requirement, and determining a region, on a surface of rock slag, that meets a set condition as an action region for abrasiveness test experiment; and a rock abrasiveness test apparatus automatically performing an abrasiveness test for a rock slag under test that meets a requirement.

A Fatigue Performance Test induces a traffic analogous, 60 cycle, stress-strain environment into a road pavement cross section through a rolling cyclic fatigue platform. Data from the encounter dynamic reveals where strain build-up is occurring well before external, visually detectable evidence of fatigue failure is present in the pavement sample from cracks or permanent deformation. Responsive tuning of the embedded, sensor firmware establishes a baseline status for the sample whereupon incoming data gathered during the stress-strain encounter dynamic reveals details of fatigue build-up.