Abstract: Embodiments provide methods for controlling an actuator based on closed-loop feedback of capacitance measured between a rotor plate attached to a rotor and a stator plate attached to a stator. The methods involve measuring capacitance at a predetermined sampling rate using a capacitance sensing unit operationally connected to an actuator. The capacitance measurement is made between the rotor plate and the stator plate of the actuator and is subsequently stored. The methods further include calculating the capacitance change between two consecutive capacitance measurements using a processing unit operationally connected to an actuator. Based on calculated capacitance changes, a control signal is generated to regulate the operation of the actuator.

Abstract: Embodiments provide an integrated actuator and pressure sensor with closed-loop feedback of capacitance, resulting in improved actuation performance and cost-effective form factor. The disclosed integrated piezoelectric ceramic actuator comprises a capacitance sensing unit, and a piezoelectric ceramic. It operates in either actuation mode or pressure sensing mode. During the actuation operation mode, the integrated actuator generates a first control signal based on the capacitance measured at the capacitance sensing unit. During the pressure sensing operation mode, the working parameters corresponding to pressure applied to the piezoelectric ceramic are determined based on the measured capacitances.

Abstract: An angle detection apparatus, method, and electronic device for detecting the rotational angle of an axis are disclosed. The apparatus comprises: a first electrode plate on a first plane; second and third electrode plates on a parallel plane, each being of equal size, sharing a common center, and shaped as ring sectors. A dielectric material is positioned between the planes, with its rotational axis perpendicular to the planes and aligned with the center of the ring sectors. The dielectric material's projection on each electrode plate forms a ring sector with matching center and diameters. A capacitance detection chip connects to the three electrode plates to measure the ratio between capacitances detected across the first-second and first-third electrode plates. Changes in this capacitance ratio over time indicate the rotational angle of the dielectric material's axis.

Abstract: The invention relates to a novel important lycopene intermediate 3,7,11-trimethyl-1,3,6,10-tetraene-dodecyl diethyl phosphonate. A current lycopene intermediate 2,4,6,10-tetra-double bond pentadec-carbon phosphonate is difficult to synthesize. The invention provides a novel intermediate, which has the following synthesis steps of: preparing 2,6,10-trimethyl-3,5,9-undecane triene-1-aldehyde from pseudoionone; preparing 2,6,10-trimethyl-2,5,9-undecane triene-1-aldehyde from the 2,6,10-trimethyl-3,5,9-undecane triene-1-aldehyde; and subjecting the 2,6,10-trimethyl-2,5,9-undecane triene-1-aldehyde and tetraethyl methylenediphosphonate to condensation reaction to obtain target product. The invention can generate novel intermediate from raw material pseudoionone only by four reactions, thus the reactions are easy to control and great industrial value are achieved.

Abstract: The invention relates to a novel important lycopene intermediate 3,7, 11-trimethyl-1,3,6,10-tetraene-dodecyl diethyl phosphonate. A current lycopene intermediate 2,4,6,10-tetra-double bond pentadec-carbon phosphonate is difficult to synthesize. The invention provides a novel intermediate, which has the following synthesis steps of: preparing 2,6,10-trimethyl-3,5,9-undecane triene-1-aldehyde from pseudoionone; preparing 2,6,10-trimethyl-2,5,9-undecane triene-1-aldehyde from the 2,6,10-trimethyl-3, 5,9-undecane triene-1-aldehyde; and subjecting the 2,6,10-trimethyl-2,5,9-undecane triene-1-aldehyde and tetraethyl methylenediphosphonate to condensation reaction to obtain target product. The invention can generate novel intermediate from raw material pseudoionone only by four reactions, thus the reactions are easy to control and great industrial value are achieved.