摘要:
A simulation press is provided comprising a fixed main body; a carriage associated with the main body for movement relative to the main body; a first plate coupled to the fixed main body and being adapted to engage a workpiece; and a second plate coupled to the carriage for movement with the carriage. The second plate is also adapted to engage the workpiece. One or more motor apparatus are coupled to the fixed main body and the carriage for effecting movement of the carriage relative to the main body. A drive controller is coupled to the motor apparatus for controlling the operation of the motor apparatus in response to feedback from one or more feedback sensors so as to cause the second plate to move relative to the first plate such that the first and second plates engage at least one point site on the workpiece so as to simulate compression loading of a point site on a workpiece in a nip type process.
摘要:
A sensor pad for controlling the deployment of an automobile airbag. Weight sensing pad 10 is used in the seat 54 of an automobile, (not illustrated), to detect the presence of an occupant on the seat. Weight sensing pad 10 is used in conjunction with the vehicle's airbag control module in order to allow deployment of the airbag, in the event of a collision, only if the seat is occupied by a person of a preselected weight. Weight sensing pad 10 is defined by a bladder member 15 having an interior volume subdivided into a plurality of individual cells 42 in fluid communication with each other and that is filled with a non-compressible fluid 18, such as silicon or a silica gel of medium viscosity. A pressure tube 22 is in fluid communication with bladder 15 and is in further fluid communication with a pressure activated electronic transducer 26 which in turn is in electronic communication with the airbag controller 30. When a person sits upon weight sensing pad 10, there is a volumetric displacement of fluid 18 that provides a pressure change in the bladder member. If there is a sufficient pressure change due to the volumetric displacement of fluid to activate transducer 26, transducer 26 sends a signal to air bag controller 30. Electronic transducer 26 is selected to generate a signal upon detection of pressure resultant from the volumetric displacement of fluid 18 from bladder 15 expected from the average size adult of approximately one hundred pounds or heavier.
摘要:
A pressure verification device is provided which is configured to be used with a Superpave gyratory compactor to measure the pressure applied to a specimen of asphalt paving mix during the compaction process. The pressure verification device is positionable within the cylindrical mold of the gyratory compactor for dynamically measuring the pressure exerted upon the sample within the mold. The pressure verification device comprises a rigid disk-shaped plate having opposing surfaces, with at least one pressure transducer being carried by the disk-shaped plate on one of the opposing surfaces.
摘要:
An apparatus for measuring the penetration depth of a blunt object before failure of a film sample, such as a glove. Failure occurs when a film sample secured to a column ruptures from the force applied by a stylus. The penetration depth of the blunt object is equal to the distance traveled by the stylus under the method of the invention. With the measurement of the penetration depth and the force applied by the stylus, a quantitative measurement of the rupture strength of the film sample is obtained.
摘要:
A high strain rate tester for elastomeric materials used in sports balls includes a base on which a sample of the material is mounted and a striker which delivers an impact to the sample, preferably in the vertical direction. A load cell adjacent to the sample measures the reaction force of the impact from the sample and an optical detector measures the displacement of the sample in the vertical direction. The force and displacement measurements are processed to determine the time dependent strain of the material.
摘要:
An apparatus for measuring tension and stress, which is capable of adjusting an angle of measurement. The apparatus includes a base plate, a supporting member, and a body for measuring tension and stress. The supporting member is mounted on the base plate. The supporting member further includes a revolving spindle supported by a bearing so that the body for measuring tension and stress can be attached to the supporting member in a way that the body for measuring tension and stress is capable of turning on the revolving spindle. In this way, the user can adjust the angle between the body for measuring tension and stress and the base plate, fulfilling the purpose of doing measurement for an object in an arbitrary angle of measurement.
摘要:
A device for measuring the rate of recovery of a foam sample under compression includes a compression surface engageable with the foam sample and a displacement transducer disposed in mechanical communication with the compression surface. A process of measuring the rate of recovery of the foam sample under compression includes exerting a compressive force on the foam sample such that the foam sample is compressed by a predetermined percentage of its thickness, releasing the compressive force, and measuring the thickness versus time of the recovering foam sample as it returns to its pre-deformed state.
摘要:
A gyratory compactor apparatus is provided for interacting with a sample within a generally cylindrical mold having a flange. Such an apparatus comprises a frame defining an axis and an offsetable member engaged with the frame for engaging one end of the mold. The offsetable member is displaceable from the axis and is concurrently movable in an orbital motion thereabout. A pressure ram is movable along the axis and a mold-engaging device is engaged with the frame for receiving the mold such that the mold and frame axes are coaxial. The pressure ram is axially movable within the mold to apply a compaction pressure on the sample, and thereby maintains a portion of the mold at a gyration point along the frame axis. The mold-engaging device axially moves the mold into engagement with the offsetable member. A securing device engaged with the offsetable member and movable therewith reversibly engages the mold to secure the mold to the offsetable member as the secured end is moved in the orbital motion by the offsetable member. The mold is thereby gyrated and dynamically maintained at a gyration angle. Associated apparatuses, devices, and methods are also provided.
摘要:
Apparatus for locating adhesive failure of sealant joints. Useful for determination of the quality of sealant joints in structures, especially curtain wall buildings. A substantially constant pressure probe is utilized to displace roughly a middle third of a sealant bead that is located along a sealant joint having longitudinal axis and spanning a gap between adjacent substrates, using a predetermined force calibrated to provide a preselected elongation of a particular type of sealant. The testing apparatus has a frame, a first fluid cylinder having an first end wall, a first tubular cylinder wall, a first piston, and a first shaft. The first shaft is response to movement of the first piston. The first shaft has a probe affixed thereto. A second fluid cylinder is provided having an internal pressure equalization chamber defined by a second end wall, a second tubular cylinder wall, a second piston, and a fluid supply port for receiving a substantially constant pressure fluid supply to the internal pressure equalization chamber. Movement of the first piston transfers fluid pressure to the internal pressure equalization chamber of the second piston, thereby maintaining a substantially constant pressure on the first piston, and thus maintaining a substantially constant reaction force on the probe.
摘要:
An apparatus adapted to interact with a cylindrical mold for a gyratory compactor so as to determine a gyration angle of the mold is provided, wherein the mold is adapted to contain a sample therein. Such an apparatus comprises a rigid disk-shaped plate defining an axis and a periphery, with the plate being adapted to be disposed within a wall of the mold. At least one inductive sensing device is operably engaged with the plate, wherein the at least one inductive sensing device is configured to measure a proximity of the at least one inductive sensing device with respect to the wall of the mold and to produce a corresponding signal indicative of the gyration angle of the mold. The gyration angle of the mold may be determined either statically or dynamically. Associated apparatuses, systems, and methods are also provided.