摘要:
A precision flexure plate includes a flat disk positioned between two capacitor plates and supported by S-shaped beams. Deflection of the disk due to gravitational loads and resulting capacitance change is used to measure the accelerations in the direction perpendicular to the disk.
摘要:
A method for constructing a compensated composite structure, including a support tube coupled to a flexure plate and enclosing a capacitor plate, includes selecting a material for the support tube whereby the coefficient of expansion is larger than that of the material of the capacitor plates. Further, the method includes selecting the lengths of the support tube and the capacitor plate such that the composite structure is insensitive to changes in temperature.
摘要:
An accelerometer system includes a capacitor plate fixed within a housing and a flexure plate positioned substantially parallel to the capacitor plate a distance therefrom. The distance varies in response to acceleration forces acting upon the flexure plate such that the flexure plate and the capacitor plate generate a capacitance signal. A magnet is coupled to the flexure plate and generates a magnetic field, which moves as the flexure plate flexes. A coil winding around the flexure plate generates a second magnetic field as a function of capacitance signal, thus opposing the flexure plate magnetic field, and thereby returning the flexure plate to a null position.
摘要:
An accelerometer system includes a capacitor plate fixed within a housing and a flexure plate positioned substantially parallel to the capacitor plate a distance therefrom. The distance varies in response to acceleration forces acting upon the flexure plate such that the flexure plate and the capacitor plate generate a capacitance signal. A magnet is coupled to the flexure plate and generates a magnetic field, which moves as the flexure plate flexes. A coil winding around the flexure plate generates a second magnetic field as a function of capacitance signal, thus opposing the flexure plate magnetic field, and thereby returning the flexure plate to a null position.
摘要:
An aerospace system includes a leveling device defining two plane levels (yz-plane and xz-plane). The plane levels are included within an inertial measurement unit and each of the plane levels includes two capacitance controlled oscillators. Each of the capacitance controlled oscillators includes a quad capacitor bubble sensor.
摘要:
The present invention involves a method of providing an integrated circuit package having a substrate with a vent opening. The integrated circuit package includes a substrate having an opening and an integrated circuit mounted to the substrate. An underfill material is dispensed between the substrate and the integrated circuit.
摘要:
Navigational systems and methods are disclosed herein to provide accurate processing of two-dimensional sensor images for navigation and determination of position in three-dimensions. Landmark features are extracted from two-dimensional sensor images and correlated to landmark features data stored in a database to estimate latitude, longitude, and altitude of a vehicle or missile.
摘要:
The present invention involves a method of providing an integrated circuit package having a substrate with a vent opening. The integrated circuit package includes a substrate having an opening and an integrated circuit mounted to the substrate. An underfill material is dispensed between the substrate and the integrated circuit.
摘要:
A system and program of instructions for generating and utilizing a database of driving trip data and event data to identify drivers by mobile devices during a driving trip, comprising identifying a driver, determining a driving trip based on driving trip data, identifying device usage events associated with the driver, determining a driving context for the driver based on the driving trip, the usage events and context data, filtering the usage event data associated with the portable electronic device based on the driving context to create a set of risk events that occurred during the trip, and taking some action based on the set of risk events. The usage event data includes phone calls, text and other forms of messages, emails, applications, and other usage information, including usage associated with third party sources, each of which occur during the operation of a motor vehicle during a trip.