Systems and methods for evaluating the performance of an athlete using a strain gauge is described. In some embodiments, the measurement system comprises a strain gauge and a central processing device. The strain gauge can include a power source, an inertial measurement unit (“IMU”) comprising a load cell, a microcontroller, and a wireless communication module. The strain gauge can be configured to output strain data at a rate of at least 1kHz and the central processing device can be configured to receive the strain data transmitted from the wireless communication module.

A force transducer for measuring compression and/or tension forces includes a rod-shaped deformation body and at least four strain transducers applied on the deformation body and configured for measuring longitudinal and transverse strains thereof. Front and rear elongate recesses are provided on the front and rear sides of the deformation body in the area of an intersection between a central longitudinal axis and a central transverse axis of the deformation body. Left and right upper indentations and left and right lower indentations are provided on the deformation body respectively at the four quadrants bounded by the axes. A ratio of a cross-section on a center plane extending orthogonally to the central longitudinal axis and including the central transverse axis, to a sum of first and second partial regions of the cross-section, is from 1.56 to 2.15.

Described is a compression apparatus for a testing system having a load cell. The compression apparatus includes a compression rod and at least one mechanical fastener. The compression rod has a first portion at a distal end and a second portion that defines a threaded bore at a proximal end. The first portion is configured to contact a specimen and the second portion is configured to couple to the load cell. The mechanical fastener is configured to mate with the threaded bore.

Systems and methods for evaluating the performance of an athlete using a strain gauge is described. In some embodiments, the measurement system comprises a strain gauge and a central processing device. The strain gauge can include a power source, an inertial measurement unit (“IMU”) comprising a load cell, a microcontroller, and a wireless communication module. The strain gauge can be configured to output strain data at a rate of at least 1 kHz and the central processing device can be configured to receive the strain data transmitted from the wireless communication module.

The invention relates to a screw nut (1) with a sensor module (5) for determining a pretensioning force of a screw connection, wherein the sensor module (5) comprises at least one deformation detection sensor (7) arranged on a base body (6) of the screw nut (1) for detecting a deformation of the base body (6) of the screw nut (1) and an RFID transponder unit (8), and wherein a printed circuit board (9) of the sensor module (5), on which an antenna (10) of the RFID transponder unit (8) and an electronic circuit of the sensor module (5) are formed and which is electrically conductively coupled to the at least one deformation detection sensor (7), is arranged on an end face (11) of the base body (6). Furthermore, the invention relates to a mounting device (2).

A system and a method of testing a specimen. The system includes an endcap, a plurality of bars, a plurality of strain gauges, and a gas gun. The endcap includes a first surface and a second surface opposite to the first surface. The first surface is curved. Each bar is disposed in contact with the second surface of the endcap and extends along a longitudinal axis. Each strain gauge is disposed on a surface of a corresponding bar from the plurality of bars. At least one strain gauge is disposed on the surface of each bar. The gas gun is configured to fire a specimen towards the first surface of the endcap such that the specimen impacts the first surface at an oblique angle relative to the longitudinal axis.

A kingpin assembly includes a housing having a recess located therein, a kingpin having at least a portion located within the recess of the housing, wherein the kingpin is secured within the recess of the housing, and wherein the kingpin includes an axis extending along a length of the kingpin, and a sensor arrangement configured to sense a force exerted on the kingpin in a first direction that is substantially perpendicular to the longitudinal axis.

A signal detection device includes a strain gauge disposed in a strain gauge disposition section defined on a rotation spindle; a control circuit board disposed in the strain gauge disposition section and electrically connected to the strain gauge; an electrical power supply unit received in a receiving space defined in a pedal body to supply electrical power; an electric brush device disposed in a brush disposition section defined on the rotation spindle and set between the pedal body and the rotation spindle. The electric brush device is electrically connected to the control circuit board to supply the electrical power to the control circuit board. The electric brush device keeps the electrical power supply unit in electrical connection with the control circuit board whether the pedal body is rotating relative to the rotation spindle or not. Alternatively, the signal detection device adopts a structure of contact pin assembly and a removable battery assembly located between a free end of the rotation spindle and an end cap of the pedal body.

A load sensor element includes a substrate made of a ceramic material; an inorganic layer having a surface configured to receive a load, the inorganic layer covers a portion of the substrate; a thin-layer resistance body whose resistance value changes in accordance with the load received by the inorganic layer, the thin-layer resistance body having a main body portion and a pair of end portions, the main body portion mounted on the covered portion of the substrate and sandwiched between the substrate and the inorganic layer, the pair of end portions mounted on an exposed portion of the substrate, and the exposed portion free of the inorganic layer; and a pair of electrodes electrically connected to the pair of end portions of the thin-layer resistance body and separated away from the inorganic layer and on one side of the substrate.

A cable barrier system is managed by a cable barrier management system including a management system controller having a management processor and a plurality of turnbuckle subsystems joined to respective barrier cables to provide pretension. Each of the turnbuckle subsystems has a strain gauge mounting zone, and strain is communicated from a strain gauge circuit to the management processor. The controller is configured to determine excess strain events. Strain event data is sent via a wireless data communications interface to a remote recipient computing device.