An impact sensor has a hollow container with a spring extending therethrough. A liquid is present in the cavity. The spring biases opposing valve balls to a closed position, preventing dye that is located exterior of the cavity from entering the cavity. When a force applied to the sensor exceeds a first predetermined value, the spring is compressed or displaced, allowing at least one of the valve balls to move from the closed position to an open position, thereby allowing the dye at the moving valve ball to pass into the cavity, mixing with the liquid and providing a visual indication of the exceeded force upon the sensor.

A single axis accelerometer comprising a swing arm pivotally attached to a frame is held in apposition to a stop by a threshold force until an experienced acceleration force greater than the threshold force causes a distal segment of the swing arm to release from the stop and move toward a sensor that is activated by a sensor trigger on the distal segment of the swing arm.

A single axis accelerometer comprising a swing arm pivotally attached to a frame is held in apposition to a stop by a threshold force until an experienced acceleration force greater than the threshold force causes a distal segment of the swing arm to release from the stop and move toward a sensor that is activated by a sensor trigger on the distal segment of the swing arm.

The present disclosure provides an apparatus to measure swing mass moments of sports implements. The present disclosure further provides an apparatus to measure a center of mass point of sports implements. Some embodiments of the present disclosure further provide a single, compact apparatus configured to measure both a swing mass moment and a center of mass point of a sports implement. The disclosed swing mass measurement apparatus provides a compact mechanical device configured to quickly, accurately measure even small differences of implement swing mass. The disclosed center of mass point measurement apparatus provides a large roller rod adjuster, allowing easy adjustment of tested implements into balance of center mass over rod, then a touch stylus is moved into contact with the tested implements handle, for an accurate location measurement, that is projected onto a double size scale readout for enhanced comprehension.

One or more devices in an accident detection and recovery computing system may be configured to determine that vehicle accidents have occurred, collect and analyze accident characteristics and other related data, and providing customized accident recovery services. Mobile computing devices, alone or in combination with vehicle-based systems and external devices, may detect accidents or receive accident indication data. After determining that an accident has occurred, mobile computing devices and/or vehicle-based systems may be configured to determine accident characteristics, retrieve vehicle data and vehicle occupant data from one or external servers, determine the damages or potential damages resulting from the accident, and determine one or more accident recovery options or recommendations based on the accident damages. Various user interface screens may be generated and displayed via the user's mobile device and/or a vehicle-based display device to provide the user with accident information, damages, and recovery options or recommendations.

The present invention involves a test subject performing a sit-to-stand (STS) operation while wearing a device (MD) that contains an acceleration sensor (11) on the front of the chest. The present invention derives a muscular strength index (maximum acceleration value per unit of muscle mass during STS activity) representing the muscular strength of a human body by obtaining maximum acceleration value data from a signal expressing the size of an acceleration vector comprising a tri-axial component in detected acceleration, and using the maximum acceleration value data and the muscle mass or body fat mass of the text subject.

The present invention involves a test subject performing a sit-to-stand (STS) operation while wearing a device (MD) that contains an acceleration sensor (11) on the front of the chest. The present invention derives a muscular strength index (maximum acceleration value per unit of muscle mass during STS activity) representing the muscular strength of a human body by obtaining maximum acceleration value data from a signal expressing the size of an acceleration vector comprising a tri-axial component in detected acceleration, and using the maximum acceleration value data and the muscle mass or body fat mass of the text subject.

An inertia detection device includes one set of gyro sensors for detecting an angular velocity of a detection target object along a same direction, the gyro sensors arranged in a same physical quantity range, in which sensor movement is detectable as a same physical quantity. When an abnormality affecting an output signal of one of the gyro sensors is caused, based on an observation that a difference of magnitudes of the output signals from normal and abnormal gyro sensors is different from a difference of magnitudes of the output signals from two normal gyro sensors, such an abnormality of one of the gyro sensors is determinable by a comparison between the output signals, without using an estimated value thereof.

An inertia detection device includes one set of gyro sensors for detecting an angular velocity of a detection target object along a same direction, the gyro sensors arranged in a same physical quantity range, in which sensor movement is detectable as a same physical quantity. When an abnormality affecting an output signal of one of the gyro sensors is caused, based on an observation that a difference of magnitudes of the output signals from normal and abnormal gyro sensors is different from a difference of magnitudes of the output signals from two normal gyro sensors, such an abnormality of one of the gyro sensors is determinable by a comparison between the output signals, without using an estimated value thereof.

A vehicle notification apparatus recognizes an object of driving over on a road on which a host vehicle travels based on a detection result by a front sensor of the host vehicle, determines whether the object of driving over flies backwards based on a detection result by a rear sensor of the host vehicle when the object of driving over is recognized, and notifies a following vehicle of projectile information corresponding to the flight of the object of driving over when it is determined that the object of driving over flies backwards.