Motorola Corporation

Honeywell G.m.b.h.

Freescale Semiconductor,inc.

Richard J August

Bogdan Szafraniec

John R Feth

Kevin B Dimond

Lee Kevin Strandjord

Andrew C McNeil

Clarence E Laskoskie

Bishnu Prasanna Gogoi

James N Blake

Daniel N Koury, Jr

David Joseph Monk

Dick Ang

Richard H Frische

John E Schmiesing

Jonathan H Hammond

Donald L Hughes, Jr

Mark Layne Shaw

David W Odle

Kevin D Neumann

Andrew C Mcneil

A motion sensor system for a tire pressure monitoring system (TPMS) that uses a piezoelectric sensor to sense vibration as an indication of wheel motion. The TPMS uses the detected vibration to transition between operation modes. In one embodiment, the TPMS has a motion mode and a park mode, wherein the TPMS has increased activity (e.g. sampling tire pressure at a higher rate and transmitting tire pressure at a higher rate) during the motion mode than in the park mode.

Motion sensing for tire pressure monitoring

A capacitive pressure sensor ( ) utilizes a diaphragm ( ) that is formed along with forming gates ( ) of active devices on the same semiconductor substrate ( ).

Method of forming an integrated CMOS capacitive pressure sensor

An electronic component includes a support substrate (101), a fixed electrode (113) overlying the support substrate (101), a movable electrode (123, 423) overlying the support substrate and the first electrode (113) wherein the first and second electrodes (113, 123, and 423) form a capacitor with a sensing area, an anchor (122, 422) coupled to the support substrate (101), and beams (125, 425) coupling different attachment points (129) of the second electrode (123, 423) to the anchor (122, 422) wherein the different attachment points (129) form a simply connected polygon and wherein a portion of the sensing area is located within the simply connected polygon.

Electronic component for measuring acceleration

An electronic component includes a substrate (201) with a surface (202), a resistor structure (210) supported by the substrate, and a passivation layer (300, 805) over the resistor and the surface of the substrate where the passivation layer has a hole (311, 312, 611, 612, 613, 614, 711, 811), where the surface of the substrate has a compressive portion and a tensile portion, and where the resistor is located between the compressive and tensile portions of the surface.

Electronic component and method of manufacture

A method for damping an optical fiber on a bias optical phase modulator having two optical fiber leads comprises the steps of securing the bias phase modulator, applying a silicone or acrylate type of substance to an outward facing surface of the fiber wound on the bias phase modulator means, applying the silicone or acrylate type of substance on the two optical fiber leads for at least 0.5 inch (1.28 cm.) along each lead which is apart from the place where the optical fiber wound on the bias phase modulator, frequently brushing or smoothing out the applied silicone or acrylate type of substance until the substance beings to set, and drying the substance on the optical fiber until the substance is cured. The applied damping material significantly reduces an amplitude of a frequency caused by mechanical vibrations in a rotation sensor.

Method for damping optical fiber on a bias optical phase modulator

A rotation sensor for sensing rotation, particularly about an axis of a coiled optical fiber, wherein the coiled optical fiber has with light waves propagating in opposite directions in the coiled optical fiber, the phase relationship of the counter-propagating light waves providing a basis for indicating rotation of the sensor. A portion of the coiled optical fiber is a part of and affected by a bias optical phase modulator which causes a varying phase relationship between the light waves at a fundamental frequency. However, the varying phase relation ship has at least one harmonic which is due to mechanical vibration of the optical fiber that is a part of the modulator. This harmonic contributes to an erroneous indication of rotation. The amplitude of such harmonic is reduced by lowering the Q of the resonating fiber. This is effected by applying a damping material to the optical fiber and a portion of the modulator. A photodetector detects the counter-propagating waves and sends a corresponding electrical signal on to a signal component selection device that provides an indication of sensed rotation, including error due to the mechanically resonating optical fiber of the modulator.

Harmonic phase modulation error reducer

An error control arrangement for an optical fiber rotation sensor having electromagnetic waves propagating in opposite directions passing through a bias optical phase modulator operated by a phase modulation generator both of which can contribute second harmonic distortion resulting in errors in the sensor output signal which are controlled. Control of the bias optical phase modulator contribution for a modulator having a piezoelectric body wrapped with an optical fiber portion is accomplished by mounting the body utilizing layers having nonlinear stiffness.

Fiber optic gyroscope modulation error reduction

Growing community of inventors

Scottsdale, AZ, United States of America

Richard J August