The present invention relates to a device for measuring grip strength including a basis; a cover coupled to the basis to form an enclosed pressure space separated from the outside; a cap disposed between the basis and the cover and configured to form a sensing space separated from the pressure space; magnets mounted on the cap or the basis to form a magnetic field; and a magnetic sensor for detecting change in the magnetic field. With this configuration, when measuring the grip strength of the user's hand, accuracy or sensitivity may be increased.

The present invention relates to a device for measuring residual stress and hardness. Residual stress remaining in a metallic material due to deformation, thermal stress, or the like is a cause of various problems including degradation of mechanical properties such as fatigue strength and fracture properties and difficulty in post-processing. It is very difficult to derive a calibration curve when measuring stress by an existing non-destructive Barkhausen noise measurement method. When cross points of Barkhausen noise measurements for three or more stresses are not at one position, calibrated curves can be easily found by scaling the Barkhausen noise measurements by using calibration equations of the present invention to collect the cross points at a unique position, thereby providing a practical method of easily measuring stress of a metal by a Barkhausen noise measurement method. Therefore, according to the present invention, it is found that the internal microstructure and surface residual stress of a metal cause crossing points not to be at a unique position in a conventional Barkhausen noise measurement experiment. In addition, basic physical properties and surface residual stress of a metallic material may be measured using the above-mentioned physical feature.

A transducer assembly includes a mounting base, a collar, a magnet, and a Hall effect sensor. The collar defines a bore and extends from a proximal end to a distal end. The proximal end is fixedly coupled with the mounting base. One of the magnet and the Hall effect sensor is disposed within the bore and fixedly coupled to the mounting base. The other of the magnet and the Hall effect sensor is fixedly coupled to the distal end of the collar. The Hall effect sensor is spaced longitudinally from the magnet and is configured to detect lateral deflection of the distal end of the collar. Methods are also provided.

A transducer assembly includes a mounting base, a collar, a magnet, and a Hall effect sensor. The collar defines a bore and extends from a proximal end to a distal end. The proximal end is fixedly coupled with the mounting base. One of the magnet and the Hall effect sensor is disposed within the bore and fixedly coupled to the mounting base. The other of the magnet and the Hall effect sensor is fixedly coupled to the distal end of the collar. The Hall effect sensor is spaced longitudinally from the magnet and is configured to detect lateral deflection of the distal end of the collar. Methods are also provided.

Techniques for force sensing in additive fabrication are provided. According to some aspects, an additive fabrication device may include a force sensor configured to measure a force applied to a build platform during fabrication. A length of time taken for a layer of material to separate from a surface other than the build platform to which it is adhered may be determined based on measurements from the force sensor. Subsequent additive fabrication operations, such as subsequent motion of the build platform, may be adapted based on the determined length of time.

For more accurate load measurement, a load measuring arrangement includes a test object and a load measuring device for measuring a load on the test object. The load measuring device includes at least one magnetic field detection device for detecting a magnetic field parameter changing due to load at a measuring zone of the test object. The test object is work-hardened, at least at the measuring zone and at least in a near-surface region extending from a surface facing the magnetic field detection device to a depth of 20 μm, in such a way that it has a dislocation density of at least 5e8/cm.sup.2 and/or a residual stress of at least 400 MPa in amount.

The disclosure relates to a load cell for a linear actuator. The load cell configured to measure a force exerted thereon by a rotary motor, and includes a spring element, a hollow portion and at least one strain gauge. The spring element includes a first side and a second side. The first side and the second side are opposite to each other. The hollow portion passes through the spring element. The at least one strain gauge is secured on the spring element and located between the first side and the second side, wherein when the force is exerted on the spring element when the rotary motor is driven to move along the first direction, the second side is moved relative to the first side, the spring element is deformed, and the at least one strain gauge changes shape, so that the force is measured and standardized under a specific range.

The disclosure relates to a load cell for a linear actuator. The load cell configured to measure a force exerted thereon by a rotary motor, and includes a spring element, a hollow portion and at least one strain gauge. The spring element includes a first side and a second side. The first side and the second side are opposite to each other. The hollow portion passes through the spring element. The at least one strain gauge is secured on the spring element and located between the first side and the second side, wherein when the force is exerted on the spring element when the rotary motor is driven to move along the first direction, the second side is moved relative to the first side, the spring element is deformed, and the at least one strain gauge changes shape, so that the force is measured and standardized under a specific range.

A sensor arrangement for measuring a mechanical loading, comprising a first member to be mechanically loaded; a first sensor component arranged on the first member; a printed circuit board (PCB); a second sensor component arranged on the PCB and spaced from the first sensor component, wherein an output signal of the second sensor component is indicative of the distance between the first and second sensor components; and an electronic component arranged on the PCB and configured to receive the output signal of the second sensor component, wherein the sensor arrangement is configured such that the distance between the first and second sensor components depends on the mechanical loading applied to the first member.

Methods, apparatus, systems and articles of manufacture are disclosed to facilitate a single pin load sensor coupled to a hitch receiver, the sensor to measure one or more loads on the hitch receiver. An example non-transitory computer readable storage medium comprising machine-readable instructions that, when executed, cause a processor to at least capture, via a camera coupled to a vehicle, an image of a hitch of the vehicle, analyze the image to determine position data of a mount of the hitch, and calculate an actual load on the hitch based on the position data.