The present technology provides an impact test device and method. The rotational speed of a rotary drum with a rubber sample attached on the outer surface is set to a desired rotational speed, the impact cycle for the surface of the rubber sample of the contact member by the repeat-impact mechanism is set to a desired cycle, the impact load by the contact member is set to a desired impact load by a weight member, a desired contact member is selected from among the plurality of contact members with different specifications, and the contact member is repeatedly made to collide with the surface of the rubber sample by rotating a vertical excitation roller and pivoting the arm portion in the vertical direction with a rotation shaft.

A method of detecting a preload of a linear guide includes: applying an external force to the linear guide with an external force applying device, wherein the external force applying device sends an impact signal while applying the external force; sensing with a sensor a vibration signal sent from the linear guide because of vibration thereof which occurs under the external force; and receiving the impact signal of the external force applying device and the vibration signal of the sensor and calculating the preload of the linear guide according to a received result, with a signal analyzer. Therefore, with the method of the present invention, the preload of the linear guide is precisely tested regardless of environmental factors.

An output member for a Direct Impact Hopkinson pressure bar includes an elongate tube portion and a disc-shaped cap portion. The tube portion has a first end and an opposite second end, while the cap portion includes a first face and an opposite second face. A circular stub protrudes from a center of the first face, and a circular cavity is formed in the second face. Each of the stub and the cavity is concentric with the cap portion, with a diameter of the cavity being greater than a diameter of the stub. The second face of the cap portion is positioned in intimate contact with the first end of the tube portion, with the cap portion being concentric with the tube portion.

A system has footwear and a striking device. The striking device has a shaft connected to a striking surface for contacting an object. A sensor affixed to the shaft changes electrical resistance when the striking surface is swung to contact the object to in turn generate a signal reflective of the deflection of the shaft. The footwear is configured with an array of sensors that change at least one electrical characteristic upon deflection when the player is operating the striking device. The footwear is to send signals reflective of the deflection of the feet as the shaft is swung. The signals reflective of the deflection of the shaft and the footwear are sent to a cell phone, notebook, PC or the like suitably programmed to present audio and visual images of the feet positions and movement and movement of the striking device (e.g., golf club, racket).

The present disclosure relates to a personal wearable device. The personal wearable device may include one or more sensors, a charging circuit and a transceiver. In one embodiment, the personal wearable device may be a mouthguard. Also disclosed is a system which includes a personal wearable device and a personal electronic device which receives impact information from the personal wearable device, determines that the impact information indicates that an impact force above a pre-determined threshold has been experienced by the personal wearable device, and transmits a notification.

An electronic device includes at least one sensor configured to collect sensing data, a memory configured to store the sensing data, and a processor. The processor is configured to acquire first sensing data through the at least one sensor and determine a falling pattern of the electronic device based on the first sensing data, acquire second sensing data through the at least one sensor and determine a collision pattern according to falling of the electronic device based on the second sensing data, determine the type of object with which the electronic device collides based on the falling pattern and the collision pattern, and perform a preset function based on the type of the object.

A rotating force sensing kickboxing apparatus is disclosed. An example apparatus includes a support member including a first connector located at a bottom portion of the support member and a body. The apparatus also includes a sensor attached to the body, the sensor configured to detect an object striking a portion of an exterior side of the body. The apparatus further includes a stand including a circular recessed channel and a second connector secured within the circular recessed channel and configured to connect to the first connector. The second connector is configured to rotate within the circular recessed channel. The connection of the first connector to the second connector enables the body and the support member to be rotatable with respect to the stand.

A plastically deformable almen strip is held under a predetermined underwater environment in which water jet peening is carried out, and a result of providing compressive residual stress in the water jet peening is confirmed by jetting water jet to the almen strip.

An Internet of Thing (IoT) device includes a camera coupled to a processor; and a wireless transceiver coupled to the processor. Blockchain smart contracts can be used with the device to facilitate secure operation.

A feeding apparatus is provided for supplying feed to a trough. The feeding apparatus includes a plurality of feed dispensers having respective outlets. The feeding apparatus further includes a slide, the slide being positioned below the outlets to receive feed falling from the outlets and guide the feed towards the trough. The slide includes a plurality of impact detectors located below the respective outlets to detect impact of feed on the slide.