The present invention provides a shock recording device includes: an electric power source; a vibration energy harvester including a first electrode and a second electrode, the vibration energy harvester converting an energy of a shock applied thereto into a potential difference between the first electrode and the second electrode; a first transistor including a first gate electrode, a first source electrode, and a first drain electrode, the first transistor further including a stacked structure of a ferroelectric layer and a semiconductor layer; and a second transistor including a second gate electrode, a second source electrode, and a second drain electrode. The second gate electrode is electrically connected to the first electrode. The second drain electrode is electrically connected to the electric power source. The second source electrode is electrically connected to the first gate electrode. The first source electrode is electrically connected to the second electrode.

The present invention comprises apparatuses and methods of detecting impacts to the head. Accelerometers attached to a user's head and neck or body is used to measure the differential acceleration of the head with respect to the neck or body. A differential acceleration exceeding a certain threshold may be indicative of the user suffering a traumatic brain injury.

A collision sensor assembly is attachable to a stationary structure such as a pallet rack, a door frame, the corner of a wall, or the like. The collision sensor is configured to sense when a collision occurs with the stationary structure such as when a piece of movable machinery contacts the stationary structure. The collision sensor assembly includes a sensor operatively connected to a processor which determines when a collision occurs, and produces a signal to an output signal generator to provide an external indication of the collision.

The present disclosure relates to a gas-conducting device having a safety device for interrupting a gas flow in the device. In a resting state, an inertia body is located on a resting place of a housing bottom so that a plunger rests on it. In an activation state, the inertia body moves out of the resting place, the plunger moves toward the housing bottom, and the safety device interrupts the gas flow. The present disclosure provides in that the housing bottom includes at least one guiding structure and that in the activation state the guiding structure guides the inertia body to a deflection point, in that the guiding structure is designed essentially in the shape of a section of a jacket of a cylinder, and in that a longitudinal axis of the cylinder is offset in relation to a vertical axis which is perpendicular to a center point and/or a lowest point of the resting place.

An inertial force sensor has a first sensor element, a second sensor element, a first signal processor, a second signal processor, and a power controller. The first sensor element converts a first inertial force to an electric signal, and the second sensor element converts a second inertial force to an electric signal. The first signal processor is connected to the first sensor element, and outputs a first inertial force value. The second signal processor is connected to the second sensor element, and outputs a second inertial force value. The power controller is connected to the first signal processor and the second signal processor, and changes power supplied to the second signal processor based on the first inertial force value.

An inertial force sensor has a first sensor element, a second sensor element, a first signal processor, a second signal processor, and a power controller. The first sensor element converts a first inertial force to an electric signal, and the second sensor element converts a second inertial force to an electric signal. The first signal processor is connected to the first sensor element, and outputs a first inertial force value. The second signal processor is connected to the second sensor element, and outputs a second inertial force value. The power controller is connected to the first signal processor and the second signal processor, and changes power supplied to the second signal processor based on the first inertial force value.

A collision sensor assembly is attachable to a stationary structure such as a pallet rack, a door frame, the corner of a wall, or the like. The collision sensor is configured to sense when a collision occurs with the stationary structure such as when a piece of movable machinery contacts the stationary structure. The collision sensor assembly includes a sensor operatively connected to a processor which determines when a collision occurs, and produces a signal to an output signal generator to provide an external indication of the collision.

An impact detection circuit includes a first detection section adapted to detect presence or absence of an impact input based on a first output signal as an output signal in a first detection axis of an inertial sensor having the first detection axis and a second detection axis different from each other, a second detection section adapted to detect presence or absence of an impact input based on a second output signal as an output signal in the second detection axis, and an impact detection determination section adapted to determine that an impact input has been made in a case in which both of the first detection section and the second detection section have detected the presence of the impact input.

A collision sensor assembly is attachable to a stationary structure such as a pallet rack, a door frame, the corner of a wall, or the like. The collision sensor is configured to sense when a collision occurs with the stationary structure such as when a piece of movable machinery contacts the stationary structure. The collision sensor assembly includes a sensor operatively connected to a processor which determines when a collision occurs, and produces a signal to an output signal generator to provide an external indication of the collision.

An impact indicator includes a first member having a reservoir for holding an indicator fluid; a second member couplable to the first member; and a third member disposed between an opening of the reservoir and the second member. Responsive to receiving a predetermined level of impact, at least a portion of the indicator fluid exits the reservoir, and wherein the third member causes the portion of the indicator fluid to be distributed across a surface of the first member adjacent the opening and facing the third member, the portion of the indicator fluid located on the surface of the first member providing a visual indication of the received predetermined level of impact.