A system for simultaneously measuring the indentation hardness properties, span properties, and resilience properties of a mattress includes a first indentation means and a second indentation means, and means for urging the first indentation means and the second indentation means into the mattress with a predetermined force, and also includes laser means for projecting a laser line configured to map, preferably by photographic triangulation, the amplitude, shape, and time-dependency of the resultant deflection of the mattress surface between the first indentation means and the second indentation means. A method for simultaneously measuring the indentation hardness properties, span properties, and resilience properties of a mattress is also provided.

A system comprising a testing device comprising: a probe configured to be advanced to engage a produce item positioned in relation to the testing device, and at least one sensor configured to measure a resisting force by the produce item to the advancing; at least one hardware processor; and a non-transitory computer-readable storage medium having stored thereon program instructions, the program instructions executable by the at least one hardware processor to: operate the testing device to continuously advance the probe to engage a surface of the produce item while measuring the resisting force, discontinue the advancing when the resisting force ceases to increase as a result of the advancing, and determine a highest resisting force measured during the advancing, wherein the highest resisting force is indicative of a firmness value of the produce item.

The present invention relates to a jig for evaluating a buffer pad. The jig includes a first plate configured to be positioned on one surface of the buffer pad and configured to press the buffer pad; a second plate configured to be positioned on another surface of the buffer pad and configured to press the buffer pad from the other surface; and a magnet member configured to be positioned between the first plate and the second plate. A recessed portion, which is recessed to allow the magnet member to be disposed, is defined at an edge of at least one of the first plate and the second plate.

Disclosed is a device for mechanically characterizing an element of interest, for example an oocyte. The mechanical characterization device includes: a support receiving a container suitable for containing a liquid medium; a holder for holding the element of interest; an indenting member; a magnet for generating a magnetic field in which the indenting member is intended to move and which participates in suspending the indenting member with an unstable horizontal direction oriented coaxially to the longitudinal axis; a controller to control the magnet to maneuver the indenting member in translation along the unstable horizontal direction; and a component for determining the mechanical characteristics of the element of interest.

A testing machine comprising: (a) a transmitter; (b) a receiver opposing the transmitter; and (c) a compressibility sensor in communication with the transmitter, the receiver, or both, wherein the testing machine transmits a signal between the transmitter and the receiver to perform ultrasonic testing and further performs compressibility testing of one or more objects positioned between the transmitter and the receiver.

A system for simultaneously measuring the indentation hardness properties, span properties, and resilience properties of a mattress includes a first indentation means and a second indentation means, and means for urging the first indentation means and the second indentation means into the mattress with a predetermined force, and also includes laser means for projecting a laser line configured to map, preferably by photographic triangulation, the amplitude, shape, and time-dependency of the resultant deflection of the mattress surface between the first indentation means and the second indentation means. A method for simultaneously measuring the indentation hardness properties, span properties, and resilience properties of a mattress is also provided.

A method includes preparing a rocklike core sample for compressive testing, the rocklike core sample defining a longitudinal axis and having first and second axial ends. Preparing the rocklike core sample includes providing a throughhole in the rocklike core sample, the throughhole extending between a first opening at the first axial end and a second opening at the second axial end, wherein the first opening and the second opening are dimensioned differently. The rocklike core sample is mounted in a compressive testing apparatus, and a compressive test is performed on the rocklike core sample in the compressive testing apparatus. The compressive test includes compression in axial and radial directions. A related system includes a compressive testing apparatus and a sample preparation apparatus which prepares a rocklike core sample for compressive testing in the compressive testing apparatus, via providing a throughhole in the rocklike core sample.

A device is configured to allow for the load-bearing capacity of cylindrical shells of a composite fiber material that are at risk of buckling to be determined. The device allows for deriving improved reduction factors for analytical calculation of the design load, which enables an improved approximation to the actual load-bearing capacity. The device includes a load distribution head for applying an axially acting force to a cylinder shell introduced into the device; a dent actuator for producing a single dent in a surface of the cylinder shell in a predetermined dent direction with a predetermined dent depth; a fixed support for fixing the dent depth of the single dent produced by the dent actuator in the predetermined dent direction; a dent force sensor for determining a dent force in the predetermined dent direction of the single dent that is fixed in the predetermined dent direction when a steadily increasing, axially acting force is applied to the cylinder shell by the load distribution head; a control unit for actuating the load distribution head for applying a steadily increasing, axially acting force to the cylinder shell until a complete failure of the cylinder shell is detected as a load step by an axial force sensor; and a digital data memory for storing a current dent force in an event of a complete failure of the cylinder shell and the applied axially acting force on the cylinder shell at the current dent force for the predetermined dent depth.

Embodiments are generally directed to a lateral expansion apparatus for mechanical testing of stretchable electronics. An embodiment of a system includes a compressible cylinder to apply mechanical forces to a stretchable electronics device by the compression and release of the compressible cylinder; a compression unit to compress to the compressible cylinder, wherein the compression unit is to apply a compression force in a direction along an axis of the compressible cylinder to generate lateral expansion of the compressible cylinder; and a testing logic to control compression and release of the compressible cylinder.

Embodiments are generally directed to membrane test for mechanical testing of wearable devices. A mechanical testing system includes an actuation mechanism including a clamp to hold a membrane including stretchable electronics over an opening in the actuation mechanism, wherein the actuation mechanism is to apply pressure to the membrane through the opening; and a testing logic to control the application and release of pressure on the membrane by the actuation mechanism.