A flexible differential strain sensor, system, and method includes a deformable substrate having a first axis and a second axis different than the first axis and a first sensing element and a second sensing element. The first and second sensing elements are comprised of conductive gel. The first sensing element is arranged to sense strain in the deformable substrate along the first axis. The second sensing element has a first portion arranged to sense strain in the deformable substrate along the first axis and a second portion arranged to sense strain in the deformable substrate along the second axis. The second sensing element is arranged to cancel at least a portion of the stimulus sensed by the first sensing element in the along the first axis.

The present invention relates to a sensor module for detecting unevenness of a surface, especially for detecting bulging and bowing of the pipe external surface. The sensor module comprises an arm assembly comprising an arm body having at least two ends, one or more surface contacting element mounted to at least one end of the arm body; a magnet assembly comprising at least one magnet to generate magnetic lines of force; and a magnetic sensor assembly comprising a magnetic sensor being assembled adjacent to the magnet for sensing changes in the magnetic lines of force in response to movement of the arm body. The invention also relates to an apparatus comprising the said sensor module and a method for detecting unevenness of a surface using the said sensor module.

The present invention relates to a sensor module for detecting unevenness of a surface, especially for detecting bulging and bowing of the pipe external surface. The sensor module comprises an arm assembly comprising an arm body having at least two ends, one or more surface contacting element mounted to at least one end of the arm body; a magnet assembly comprising at least one magnet to generate magnetic lines of force; and a magnetic sensor assembly comprising a magnetic sensor being assembled adjacent to the magnet for sensing changes in the magnetic lines of force in response to movement of the arm body. The invention also relates to an apparatus comprising the said sensor module and a method for detecting unevenness of a surface using the said sensor module.

A surgical end effector includes a cartridge. The cartridge includes first and second sensor arrays disposed in the cartridge. The first sensor array is configured to sense a function of a first component located within the cartridge and the second sensor array is configured to sense a function of a second component located within the cartridge. The first and second sensor arrays are electrically coupled to an electronic circuit. The electronic circuit includes a control circuit configured to receive signal samples from the first sensor array, receive signal samples from the second sensor array, and process the signals samples received from the first and second sensor arrays to determine a status of the cartridge.

A surgical end effector includes a cartridge. The cartridge includes first and second sensor arrays disposed in the cartridge. The first sensor array is configured to sense a function of a first component located within the cartridge and the second sensor array is configured to sense a function of a second component located within the cartridge. The first and second sensor arrays are electrically coupled to an electronic circuit. The electronic circuit includes a control circuit configured to receive signal samples from the first sensor array, receive signal samples from the second sensor array, and process the signals samples received from the first and second sensor arrays to determine a status of the cartridge.

Aspects include a hybrid socket dynamic warp indicator for socket connector systems and methods of using the same to measure the warpage of a printed circuit board assembly. The method can include providing a printed circuit board having a plurality of pads and a socket. A warp indicator having a plurality of solder joint connections and a resistor array is electrically coupled to the printed circuit board to build a printed circuit board assembly. The printed circuit board assembly is subjected to a thermal event. A resistance across the resistor array is measured after the thermal event. A number of separations between one or more pads of the printed circuit board and one or more solder joint connections of the warp indicator is determined based on a change in the resistance. A defective warpage condition for the socket is determined based on the number of separations.

A technique for testing a pushrod valvetrain in an engine includes replacing an original pushrod with an instrumented pushrod (IPD) which includes a sensor configured to measure strain and/or motion. The engine is then operated, and the output of the sensor is monitored for anomalies. Diagnosis and repair of identified defects may then follow.

A technique for testing a pushrod valvetrain in an engine includes replacing an original pushrod with an instrumented pushrod (IPD) which includes a sensor configured to measure strain and/or motion. The engine is then operated, and the output of the sensor is monitored for anomalies. Diagnosis and repair of identified defects may then follow.

A high-speed tensile testing machine conducts a tensile test on a test piece by applying a test force to the test piece. The high-speed tensile testing machine includes a detection unit configured to detect a test period indicating a time from when the test piece starts to deform under action of the test force to when the test piece breaks, and a determination unit configured to determine validity of a test result of the tensile test, on the basis of the test period and natural vibration of the high-speed tensile testing machine. Specifically, in the case where the test period is a predetermined multiple or more of a specific cycle indicating a cycle of the natural vibration of the high-speed tensile testing machine, the determination unit determines that the test result of the tensile test is valid.

A high-speed tensile testing machine conducts a tensile test on a test piece by applying a test force to the test piece. The high-speed tensile testing machine includes a detection unit configured to detect a test period indicating a time from when the test piece starts to deform under action of the test force to when the test piece breaks, and a determination unit configured to determine validity of a test result of the tensile test, on the basis of the test period and natural vibration of the high-speed tensile testing machine. Specifically, in the case where the test period is a predetermined multiple or more of a specific cycle indicating a cycle of the natural vibration of the high-speed tensile testing machine, the determination unit determines that the test result of the tensile test is valid.