Patent classifications
G01C19/5712
MEMS Gyroscope
The invention discloses a MEMS gyroscope, including a substrate, a first unit and a second unit, and the first unit and the second unit are relatively arranged on the substrate along the first direction. The first unit is connected to the second unit through a coupling spring, and the substrate is also provided with a driving electrode and a detection electrode. The first unit includes a first weight and a second weight. The second unit includes the third weight and the fourth weight set oppositely along the second direction. The second set of coupling structures are connected to the third weight and fourth weight. Compared with the prior art, the beneficial effect of the present invention is that the MEMS gyroscope adopts a symmetrical layout, which facilitates the realization of differential detection and improves the sensitivity.
High quality factor mems silicon flower-of-life vibratory gyroscope
A resonator includes an anchor, an outer stiffener ring on an outer perimeter of the resonator, and a plurality of curved springs between the anchor and the outer stiffener ring.
High quality factor mems silicon flower-of-life vibratory gyroscope
A resonator includes an anchor, an outer stiffener ring on an outer perimeter of the resonator, and a plurality of curved springs between the anchor and the outer stiffener ring.
Gyroscope with peripheral detection
A gyroscope comprises four Coriolis masses arranged around a center point where a lateral axis crosses a transversal axis orthogonally in the device plane. The first and second masses are aligned on the lateral axis, and the third and fourth masses are aligned on the transversal axis. The gyroscope further comprises four pairs of elongated mass elements. The mass elements of the first pair are transversally aligned on opposite sides of the lateral axis outside of the first mass. The mass elements of the second pair are transversally aligned on opposite sides of the lateral axis outside of the second mass. The mass elements of the third pair are laterally aligned on opposite sides of the first transversal axis outside of the third mass. The mass elements of the fourth pair are laterally aligned on opposite sides of the first transversal axis outside of the fourth mass.
Gyroscope with peripheral detection
A gyroscope comprises four Coriolis masses arranged around a center point where a lateral axis crosses a transversal axis orthogonally in the device plane. The first and second masses are aligned on the lateral axis, and the third and fourth masses are aligned on the transversal axis. The gyroscope further comprises four pairs of elongated mass elements. The mass elements of the first pair are transversally aligned on opposite sides of the lateral axis outside of the first mass. The mass elements of the second pair are transversally aligned on opposite sides of the lateral axis outside of the second mass. The mass elements of the third pair are laterally aligned on opposite sides of the first transversal axis outside of the third mass. The mass elements of the fourth pair are laterally aligned on opposite sides of the first transversal axis outside of the fourth mass.
Isotropic attenuated motion gyroscope
According to some aspects, there is provided a microelectromechanical systems (MEMS) device wherein one or more components of the MEMS device exhibit attenuated motion relative to one or more other moving components. The MEMS device may comprise a substrate; a proof mass coupled to the substrate and configured to move along a resonator axis; and a first shuttle coupled to the proof mass and comprising one of a drive structure configured to drive the proof mass along the resonator axis or a sense structure configured to move along a second axis substantially perpendicular to the resonator axis in response to motion of the proof mass along the resonator axis, wherein displacement of at least a first portion of the proof mass is attenuated relative to displacement of the first shuttle and/or a second portion of the proof mass.
Isotropic attenuated motion gyroscope
According to some aspects, there is provided a microelectromechanical systems (MEMS) device wherein one or more components of the MEMS device exhibit attenuated motion relative to one or more other moving components. The MEMS device may comprise a substrate; a proof mass coupled to the substrate and configured to move along a resonator axis; and a first shuttle coupled to the proof mass and comprising one of a drive structure configured to drive the proof mass along the resonator axis or a sense structure configured to move along a second axis substantially perpendicular to the resonator axis in response to motion of the proof mass along the resonator axis, wherein displacement of at least a first portion of the proof mass is attenuated relative to displacement of the first shuttle and/or a second portion of the proof mass.
SENSOR SYSTEM AND METHOD FOR COMPENSATING FOR AN OFFSET OF AN ANGULAR RATE SIGNAL
A sensor system. The sensor system comprises a MEMS gyroscope, comprising at least: a seismic mass, which can be excited to vibrate and has at least one electrode assembly for capacitively detecting a measurement signal, a drive circuit for generating a drive voltage for exciting and maintaining a defined vibratory movement of the seismic mass, there being a parasitic capacitive coupling between the drive circuit and the at least one electrode assembly, a detection circuit for reading out the measurement signal and for generating an angular rate signal on the basis of the measurement signal, characterized by circuitry means for compensating for an offset of the angular rate signal on the basis of the drive voltage.
SENSOR SYSTEM AND METHOD FOR COMPENSATING FOR AN OFFSET OF AN ANGULAR RATE SIGNAL
A sensor system. The sensor system comprises a MEMS gyroscope, comprising at least: a seismic mass, which can be excited to vibrate and has at least one electrode assembly for capacitively detecting a measurement signal, a drive circuit for generating a drive voltage for exciting and maintaining a defined vibratory movement of the seismic mass, there being a parasitic capacitive coupling between the drive circuit and the at least one electrode assembly, a detection circuit for reading out the measurement signal and for generating an angular rate signal on the basis of the measurement signal, characterized by circuitry means for compensating for an offset of the angular rate signal on the basis of the drive voltage.
MEMS GYROSCOPE
A MEMS gyroscope includes an anchor point, a resonator, and a transducer. The resonator includes eight resonating blocks arranged at equal intervals and a coupling beam connecting each two adjacent resonating blocks. The resonating blocks are connected with the anchor point through anchoring beams. The anchoring beams decouple radial motion and circumferential motion of the resonating blocks. The resonating blocks include first resonating blocks, second resonating blocks, third resonating blocks, and fourth resonating blocks. In a vibration mode, the transducer drives the first and second resonating blocks to vibrate along along a first axis and a second axis respectively, so the third and fourth resonating blocks are driven to vibrate along the fourth axis and the third axis respectively. In a detection mode, the transducer detects vibration of the third resonating blocks along the third axis and the vibration of the fourth resonating blocks along the fourth axis.