ATLANTIC INERTIAL SYSTEMS LIMITED Patent applications |
Patent application number | Title | Published |
20150101409 | VIBRATORY RING STRUCTURE - A method of tuning a vibratory ring structure is described which comprises determining an angular spacing for a pair of fine tuning holes ( | 04-16-2015 |
20150040663 | VIBRATORY RING STRUCTURE - A vibratory ring structure is described which comprises a ring body and at least one ring electrode secured thereto, the or each ring electrode extending over a first angular extent and: being attached to the ring body over second angular extent, wherein the first angular extent is greater than the second angular extent. | 02-12-2015 |
20140338449 | FAULT DETECTION USING SKEWED TRANSDUCERS - A vibratory gyroscope is provided comprising a plurality of secondary pickoff transducers which are each sensitive to the secondary response mode, wherein: at least two of the secondary pickoff transducers comprise skew transducers designed to be sensitive to the primary mode which produce an induced quadrature signal in response thereto. A method of using the gyroscope is provided comprising the steps of arranging electrical connections between the secondary pickoff transducers and a pickoff amplifier so that in use the induced quadrature signal is substantially rejected by the amplifier in the absence of a fault condition, and the amplifier outputs an induced quadrature signal when a fault condition disconnects one of the skew transducers from the amplifier, and a comparator compares the quadrature output from the pickoff amplifier with a predetermined threshold value and provides a fault indication when the predetermined threshold is exceeded. | 11-20-2014 |
20140336930 | ELECTRONIC DEVICE - An electronic device comprises a circuit substrate, and a moulded interconnect device incorporating integral legs to mount the interconnect device upon the substrate, the legs spacing at least part of the interconnect device from the substrate, at least one of the legs carrying a conducting track to provide an electrical interconnection between the interconnect device and the substrate. | 11-13-2014 |
20140331769 | MEMS SENSORS - A MEMS sensor comprises a vibrating sensing structure formed from a semiconductor substrate layer ( | 11-13-2014 |
20130247667 | ACCELEROMETER - An accelerometer comprises a support, a first mass element and a second mass element, the mass elements being rigidly interconnected to form a unitary movable proof mass, the support being located at least in part between the first and second mass elements, a plurality of mounting legs securing the mass elements to the support member, at least two groups of movable capacitor fingers provided on the first mass element and interdigitated with corresponding groups of fixed capacitor fingers associated with the support, and at least two groups of movable capacitor fmgers provided on the second mass element and interdigitated with corresponding groups of fixed capacitor fingers associated with the support. | 09-26-2013 |
20130192368 | Sensor - A silicon MEMS gyroscope is described having a ring or hoop-shaped resonator. The resonator is formed by a Deep Reactive Ion Fitch technique and is formed with slots extending around the circumference of the resonator on either side of the neutral axis of the resonator. The slots improve the Quality Factor Q of the gyroscope without affecting the resonant frequency of the resonator. | 08-01-2013 |
20120116707 | Accelerometer Control Systems - An accelerometer open loop control system comprising a variable capacitance accelerometer having a proof mass movable between fixed capacitor plates, drive signals applied to the capacitor plates, a charge amplifier amplifying an accelerometer output signal representing applied acceleration, and an autoranging facility for monitoring the output signal, and for adjusting the drive signals in dependence on the output signal in order to restrict the amplitude of the accelerometer output signal, thus maintaining sensitivity of the accelerometer while permitting response to a wide range of g values. Corrections are applied by means of look up tables to compensate for inaccuracies arising from movement of the proof mass and temperature variations. | 05-10-2012 |
20110167911 | VIBRATING STRUCTURE GYROSCOPES - An exemplary vibrating structure gyroscope includes a ring structure, an external frame and a flexible support including a pair of symmetrical compliant legs arranged to retain the ring structure within the external frame. A metal track is provided on an upper surface of the ring structure, the compliant legs and the external frame, over an insulating surface oxide layer. Each flexible support is arranged to carry a metal track associated with a single drive or pick-off transducer. The metal track is repeated for eight circuits, one circuit for each transducer. Each circuit of metal track associated with a transducer begins at a first bond-pad on the external frame, runs along a first compliant leg, across an eighth segment of the ring structure and back along the other compliant leg to a second bond-pad on the external frame. | 07-14-2011 |
20100218606 | IMPROVEMENTS IN OR RELATING TO A GYROSCOPE - A gyroscope structure | 09-02-2010 |
20100212424 | IMPROVEMENTS IN OR RELATING TO ANGULAR VELOCITY SENSORS - An angular velocity sensor or gyroscope has a ring and a primary drive transducer arranged to cause the ring to oscillate in a primary mode substantially at the resonant frequency of the primary mode of the ring. A primary control loop receives primary pick-off signals from the primary pick-off transducer and provides primary drive signals to the primary drive transducer so as to maintain resonant oscillation of the ring. The primary control loop includes a demodulator arranged to determine the amplitude of the fundamental frequency of the primary pick-off signals and a demodulator arranged to determine the amplitude of the second harmonic frequency of the primary pick-off signals and a drive signal generator arranged to produce the primary drive signals | 08-26-2010 |