A system for exerting forces on a user. The system includes a user-mounted device including one or more masses, one or more sensors configured to acquire sensor data, and a processor coupled to the one or more sensors. The processor is configured to determine at least one of an orientation and a position associated with the user-mounted device based on the sensor data. The processor is further configured to compute a force to be exerted on the user via the one or more masses based on a force direction associated with a force event and at least one of the orientation and the position. The processor is further configured to generate, based on the force, a control signal to change a position of the one or more masses relative to the user-mounted device.

A system for exerting forces on a user. The system includes a user-mounted device including one or more masses, one or more sensors configured to acquire sensor data, and a processor coupled to the one or more sensors. The processor is configured to determine at least one of an orientation and a position associated with the user-mounted device based on the sensor data. The processor is further configured to compute a force to be exerted on the user via the one or more masses based on a force direction associated with a force event and at least one of the orientation and the position. The processor is further configured to generate, based on the force, a control signal to change a position of the one or more masses relative to the user-mounted device.

The present disclosure provides a mobile device and a method of changing the centroid thereof. The mobile device includes a device body, having a processor disposed therein; and a centroid changing device, including a guide rail disposed on the device body, a weight assembly slidably disposed on the guide rail, and a driving device coupled to the weight assembly, wherein the processor is electrically coupled to the driving device, and controls the weight assembly to slide along the guide rail via the driving device, to change the centroid of the device body.

The present disclosure provides a mobile device and a method of changing the centroid thereof. The mobile device includes a device body, having a processor disposed therein; and a centroid changing device, including a guide rail disposed on the device body, a weight assembly slidably disposed on the guide rail, and a driving device coupled to the weight assembly, wherein the processor is electrically coupled to the driving device, and controls the weight assembly to slide along the guide rail via the driving device, to change the centroid of the device body.

A MEMS device includes: a substrate as a base including a support portion and a detection electrode as a fixed electrode; a movable body supported to the support portion with a major surface of the movable body facing the fixed electrode; and an abutment portion facing at least a portion of an outer edge of the movable body and restricting rotational displacement in an in-plane direction of the major surface. The abutment portion includes an abutment surface including an abutment position at which the movable body abuts against the abutment portion due to the rotational displacement of the movable body, and a hollow portion provided opposing the abutment surface.

A MEMS device includes: a substrate as a base including a support portion and a detection electrode as a fixed electrode; a movable body supported to the support portion with a major surface of the movable body facing the fixed electrode; and an abutment portion facing at least a portion of an outer edge of the movable body and restricting rotational displacement in an in-plane direction of the major surface. The abutment portion includes an abutment surface including an abutment position at which the movable body abuts against the abutment portion due to the rotational displacement of the movable body, and a hollow portion provided opposing the abutment surface.

A physical quantity sensor includes a fixed portion, a support beam, a movable body, and a first fixed electrode group. The movable body is coupled to the other end of the support beam, and the first fixed electrode group is provided at a substrate and arranged in a first direction of the support beam. The movable body includes a first coupling portion, a first base portion, and a first movable electrode group. The first movable electrode group faces the first fixed electrode group in a second direction. Further, hm=hr, where hm is a height of a gravity center position of the movable body in a third direction and hr is a height of a rotation center of the support beam in the third direction.

A physical quantity sensor includes a fixed portion, a support beam, a movable body, and a first fixed electrode group. The movable body is coupled to the other end of the support beam, and the first fixed electrode group is provided at a substrate and arranged in a first direction of the support beam. The movable body includes a first coupling portion, a first base portion, and a first movable electrode group. The first movable electrode group faces the first fixed electrode group in a second direction. Further, hm=hr, where hm is a height of a gravity center position of the movable body in a third direction and hr is a height of a rotation center of the support beam in the third direction.

The invention relates to an acceleration sensor, especially a duplex acceleration sensor, an arrangement and a method for detecting a loss of road grip of a vehicle wheel (3). The acceleration sensor comprises a tube (5) having a longitudinal axis forming a circular arc segment, and two closed ends. A mass (15; 315) is arranged inside the tube (5) such that is able to move inside the tube (5) in the longitudinal direction thereof. A magnet arrangement (17; 203; 205; 317) is designed to counteract, by way of a magnetic force exerted on the mass (15; 315), a movement of said mass (15; 315) from an idle position (25), and a read-out unit (608) is designed to detect a movement of said mass (15) from the idle position (25).

The invention relates to an acceleration sensor, especially a duplex acceleration sensor, an arrangement and a method for detecting a loss of road grip of a vehicle wheel (3). The acceleration sensor comprises a tube (5) having a longitudinal axis forming a circular arc segment, and two closed ends. A mass (15; 315) is arranged inside the tube (5) such that is able to move inside the tube (5) in the longitudinal direction thereof. A magnet arrangement (17; 203; 205; 317) is designed to counteract, by way of a magnetic force exerted on the mass (15; 315), a movement of said mass (15; 315) from an idle position (25), and a read-out unit (608) is designed to detect a movement of said mass (15) from the idle position (25).