Impact or acceleration sensor, which contains a liquid droplet and is designed such that the position and/or distribution of the liquid indicates whether an impact or any other acceleration of a predetermined minimum magnitude has occurred, includes: first and second foils, a cavity disposed between the foil faces of the foils and at least one retaining structure disposed on the foil face of the first and/or second foil and functions to maintain the liquid in a predetermined first sub-volume of the cavity. The retaining structure is a region of the first and/or second foil formed as a local elevation, depression or irregularity of the foil face, which forms a passable barrier for the wetting and/or contacting of the first and/or second foil by the liquid and defines an area piece of the foil face of the first and/or second foil corresponding to the first sub-volume.

Shock indicator device for a watch, internal to the watch, including a structure, to which is fixed an inertia block by means of at least one connecting element made of elastic or ductile or breakable material, which is elastically and plastically deformable when movements are imparted to the inertia block, this inertia block being movable in proximity to a fixed opposing surface comprised in the structure itself or in another element of a watch case, and arranged to come into contact with this opposing surface, to impart a proof indicator of impact or a permanent deformation or damage to the inertia block and/or to the connecting element and/or to the opposing surface, and/or to a breakable element incorporated in the shock indicator device), when the acceleration imparted to this inertia block is higher than a given acceleration threshold.

A lone worker system for performing a safety check is provided. The lone worker system includes a mobile device. The mobile device includes a memory storing a safety check application thereon and a processor. The processor is coupled to the memory and executes the safety check application. The processor initiates the safety check application with respect to the service call. The safety check application executes a use-case safety monitoring of the mobile device with respect to a service call to implement the safety check. The use-case safety monitoring detects an emergency situation with respect to a connectivity of the mobile device to a server, an activity of the mobile device, and a motion of the mobile device.

A lone worker system for performing a safety check is provided. The lone worker system includes a mobile device. The mobile device includes a sensor and a memory storing a safety check application thereon and a processor. The processor is coupled to the memory and executes the safety check application under a motion mode including an active tracking of a fall motion event by the sensor. In response to the fall motion event being detected during the active tracking, the processor operates a count utilizing a timer of the safety check application. If the count exceeds a predetermined amount of time, the safety check application enters an emergency mode to execute an emergency alert.

An acceleration sensor assembly preventing opening of a door in response to an unusual force acting on a moving vehicle includes a stepped pin integrated with an amount of weight, at least two springs encapsulating the stepped pin while allowing free movement of the stepped pin, and a case cover with an opening at one side, the case cover enclosing the stepped pin and the at least two springs, where the unusual force is configured to cause acceleration of a vehicle door handle and trigger compression of the at least two springs, movement of the stepped pin out of the case cover, rotation of a bell crank due to pulling of the vehicle door handle, and insertion of the stepped pin into the bell crank to stop its further rotation thereby preventing opening of the door.

Systems and methods are disclosed herein for multi-axis single-drive inertial devices. A multi-axis single drive inertial device can include a rotational drive configured to oscillate a plurality of accelerometer proof masses and a plurality of gyroscope proof masses about a z axis and signal processing circuitry configured for determining inertial parameters based on motion of the plurality of accelerometer proof masses and the plurality of gyroscope proof masses. The inertial parameters can include acceleration of the inertial device along an x axis perpendicular to the z axis and along a y axis perpendicular to each of the x and z axes, and rotation of the inertial device about each of the x, y, and z axes.

An environmental data recorder includes an enclosure, a first acceleration recorder array positioned on a first inner surface of the enclosure corresponding to an x-z plane defined by an x-axis and a z-axis, a second acceleration recorder array positioned on a second inner surface of the enclosure corresponding to an x-y plane defined by the x-axis and a y-axis, and a third acceleration recorder array positioned on a third inner surface of the enclosure corresponding to a y-z plane defined by the y-axis and the z-axis. The x-axis, the y-axis, and the z-axis are orthogonal axes. The first, second, and third acceleration recorder arrays each include a plurality of beams cantilevered at first ends from a base attached to an inner surface of the enclosure and a plurality of known masses associated with the beams. The beams are configured to deform or break when exposed to different g loads.

According to one embodiment, an impact detection device includes a mobile body having mass, a supporting section, and a holding section. The supporting section includes a fixed end to be fixed to a detection target object, includes an attachment section, to a halfway position in a longitudinal direction of which separated from the fixed end the mobile body is attached, and is deformed between the fixed end and the attachment section if acceleration exceeding a fixed threshold was caused in the mobile body by impact applied to the detection target object. The holding section holds the mobile body moved by the deformation of the supporting section in a moving destination.

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.

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.