Abstract: A three-dimensional vibration control method includes: acquiring, when a trigger event is received, current state data of the electronic device and application software information associated with the trigger event; determining a holding type corresponding to the trigger event according to current state data and application software information; wherein holding type includes fully folded vertical one-handed holding, fully folded horizontal two-handed holding, half folded horizontal two-handed holding, fully unfolded vertical two-handed holding, and fully unfolded horizontal two-handed holding; determining a corresponding vibration scheme according to the holding type; and controlling the actuators to enter a vibration operating state correspondingly based on the vibration scheme.

Abstract: The present invention provides a piezoelectric sensor and an electronic device including the piezoelectric sensor. The piezoelectric sensor includes a piezoelectric ceramic layer having a first surface and a second surface, a first metal shrapnel mounted on the first surface, and a second metal shrapnel mounted on the second surface. A first cavity is formed between the first metal shrapnel and the piezoelectric ceramic layer and a second cavity is formed between the second metal shrapnel and the piezoelectric ceramic layer. The piezoelectric sensor further includes a first damping member located in the first cavity and a second damping member located in the second cavity. The second damping member is arranged symmetrically with the first damping member. The piezoelectric sensor and electronic device of the present invention can reduce the internal stress of the piezoelectric ceramic layer, thereby improving the reliability of the piezoelectric sensor.

Abstract: Provided are a piezoelectric vibrator and a piezoelectric vibrator assembly having a small volume, fast response, and high energy conversion efficiency. The piezoelectric vibrator includes a piezoelectric body and an amplifying unit fixedly supported on at least one of two opposite sides of the piezoelectric body. The piezoelectric body comprises a single-layer or multi-layer material with a piezoelectric effect. The amplifying unit is a flat structure formed by an elastic reinforcing element and having a same shape as the piezoelectric body. The elastic reinforcing element is a metal sheet. The piezoelectric body, when an external voltage is applied, expands or contracts along a first direction parallel to a plane of the piezoelectric body, and simultaneously, the amplifying unit contracts or expands along a second direction. The first direction and the second direction are perpendicular to each other.

Abstract: A piezoelectric linear motor and an electronic device, including a piezoelectric actuator and an elastic structure fixed to two opposite sides of the actuator. The piezoelectric actuator extends/retracts to drive the elastic structure to move when a voltage is applied. The elastic structure includes sets of elastic connecting portions fixed to end portions of the piezoelectric actuator, each set includes two connecting legs fixed to two opposite sides of the piezoelectric actuator, each connecting leg extends toward an outer side of the piezoelectric actuator, and connecting legs located at a same side of the piezoelectric actuator extend away from each other, and an angle is formed between each of the connecting legs and a plane where the piezoelectric actuator is located. The connecting legs have better flexibility, the elastic structure has stronger deformation capability, a haptic feedback response speed is increased and thickness of the piezoelectric linear motor is reduced.

Abstract: Provided is a noninvasive measuring method for rapid temperature variation under a DC excitation magnetic field, comprising: (1) positioning ferromagnetic particles at a measured object; (2) applying a DC magnetic field to area of the ferromagnetic particles enabling the ferromagnetic particles to reach saturation magnetization state; (3) obtaining steady temperature T1 of the measured object at room temperature, and calculating initial spontaneous magnetization M1, of the ferromagnetic particles according to the steady temperature T1; (4) detecting amplitude A of a magnetization variation signal of the ferromagnetic particles after temperature of the measured object varies, and calculating temperature T2 after change according to the amplitude A of the magnetization variation signal; and (5) calculating temperature variation ?T=T2-T1 according to the temperature T2 after change and the steady temperature T1.

Abstract: Provided is a noninvasive measuring method for rapid temperature variation under a DC excitation magnetic field, comprising: (1) positioning ferromagnetic particles at a measured object; (2) applying a DC magnetic field to area of the ferromagnetic particles enabling the ferromagnetic particles to reach saturation magnetization state; (3) obtaining steady temperature T1 of the measured object at room temperature, and calculating initial spontaneous magnetization M1, of the ferromagnetic particles according to the steady temperature T1; (4) detecting amplitude A of a magnetization variation signal of the ferromagnetic particles after temperature of the measured object varies, and calculating temperature T2 after change according to the amplitude A of the magnetization variation signal; and (5) calculating temperature variation ?T=T2-T1 according to the temperature T2 after change and the steady temperature T1.