A structure state display system has a measurement means, disposed in a structure, for measuring a physical state relating to the structure, an acquisition means for acquiring measurement information measured with the measurement means, and a creation means for applying a virtual physical quantity according to the measurement information to a design model including the structure and creating a virtual model in which a display showing the physical state of the structure in the design model is changed, and the virtual model is displayed on display means.

The invention provides an acceleration sensor, including a sensing unit, a sensing unit includes a ring-shaped outer coupling unit; seesaw structures, including at least two and arranged on an inner side of the outer coupling unit; an inner coupling unit, including an inner coupling elastic beam connecting two adjacent seesaw structures; proof mass blocks fixed on the outer coupling unit or the inner coupling unit or the seesaw structures; an in-plane coupling elastic member elastically connecting the seesaw structures to the outer coupling unit; in-plane displacement detection devices arranged on the proof mass blocks and configured to detect movements of the proof mass blocks along the first direction and/or along the second direction; and out-of-plane displacement detection devices arranged on the outer coupling unit and/or the seesaw structures and/or the inner coupling unit configured to detect movements of the seesaw structures along the third direction.

The invention provides an acceleration sensor, including a sensing unit, a sensing unit includes a ring-shaped outer coupling unit; seesaw structures, including at least two and arranged on an inner side of the outer coupling unit; an inner coupling unit, including an inner coupling elastic beam connecting two adjacent seesaw structures; proof mass blocks fixed on the outer coupling unit or the inner coupling unit or the seesaw structures; an in-plane coupling elastic member elastically connecting the seesaw structures to the outer coupling unit; in-plane displacement detection devices arranged on the proof mass blocks and configured to detect movements of the proof mass blocks along the first direction and/or along the second direction; and out-of-plane displacement detection devices arranged on the outer coupling unit and/or the seesaw structures and/or the inner coupling unit configured to detect movements of the seesaw structures along the third direction.

An accelerometer comprising a first proof mass and a second proof mass which are coupled to each other with a coupling structure which extends from the first proof mass to the second proof mass. The coupling structure synchronizes the movement of the first and second proof masses so that the first and second proof masses may be linearly displaced from their rest position in the x-direction, rotationally displaced in opposite in-plane directions and rotationally displaced in opposite out-of-plane directions.

An accelerometer comprising a first proof mass and a second proof mass which are coupled to each other with a coupling structure which extends from the first proof mass to the second proof mass. The coupling structure synchronizes the movement of the first and second proof masses so that the first and second proof masses may be linearly displaced from their rest position in the x-direction, rotationally displaced in opposite in-plane directions and rotationally displaced in opposite out-of-plane directions.

According to at least some example embodiments, a computer-readable medium stores computer-executable program instructions that, when executed by a processor, cause the processor to perform operations including, obtaining plane information of a plane by using first distances from a terminal to a plurality of points on the plane; obtaining a normal vector of the plane by using direction information of the terminal measured by a direction sensor and the plane information; determining, based on the normal vector, a parameter of an object to be displayed on the plane; and displaying, on a display of the terminal, the object according to the determined parameter.

According to at least some example embodiments, a computer-readable medium stores computer-executable program instructions that, when executed by a processor, cause the processor to perform operations including, obtaining plane information of a plane by using first distances from a terminal to a plurality of points on the plane; obtaining a normal vector of the plane by using direction information of the terminal measured by a direction sensor and the plane information; determining, based on the normal vector, a parameter of an object to be displayed on the plane; and displaying, on a display of the terminal, the object according to the determined parameter.

A method for determining the orientation of at least two inertial sensors in a device or between at least two devices, each having at least one inertial sensor, includes a) receiving first raw acceleration data and/or rotation rate data of a first inertial sensor in three directions during regular operation of the device; b) simultaneously to step a), receiving second raw acceleration data and/or rotation rate data of a second inertial sensor in three directions during regular operation of the device; c) time-synchronizing the first and second raw acceleration data and/or rotation rate data so that the time-synchronized raw acceleration data of the first inertial sensor and of the second inertial sensor are generated; and d) calculating relative orientation angles in three spatial directions between the first inertial sensor and the second inertial sensor with the time-synchronized raw acceleration data.

A method for determining the orientation of at least two inertial sensors in a device or between at least two devices, each having at least one inertial sensor, includes a) receiving first raw acceleration data and/or rotation rate data of a first inertial sensor in three directions during regular operation of the device; b) simultaneously to step a), receiving second raw acceleration data and/or rotation rate data of a second inertial sensor in three directions during regular operation of the device; c) time-synchronizing the first and second raw acceleration data and/or rotation rate data so that the time-synchronized raw acceleration data of the first inertial sensor and of the second inertial sensor are generated; and d) calculating relative orientation angles in three spatial directions between the first inertial sensor and the second inertial sensor with the time-synchronized raw acceleration data.

A device includes a signaling means and a motion sensor, and logic for activating or controlling the signaling means in response to a sensed motion according to an embedded logic. The device may be used as a toy, and may be shaped like a play ball or as a handheld unit. It may be powered from a battery, either chargeable from an AC power source directly or contactless by using induction or by converting electrical energy from harvested kinetic energy. The embedded logic may activate or control the signaling means, predictably or randomly, in response to sensed acceleration magnitude or direction, such as sensing the crossing of a preset threshold or sensing the peak value. The visual means may be a numeric display for displaying a value associated with the count of the number of times the threshold has been exceeded or the peak magnitude of the acceleration sensed.