Browse Category:

Categories

[Search within category]

All Microwave Stabilization Of Chip-Scale Frequency Combs

UCLA researchers in the Department of Electrical Engineering have developed an optical frequency comb technology using small, cheap components for high precision time, frequency, distance, and energy measurements.

All microwave stabilization of chip-scale frequency combs for high precision measurements

UCLA researchers in the Department of Electrical Engineering have developed an optical frequency comb technology using small, cheap components for high precision time, frequency, distance, and energy measurements.

Axi-Symmetric Small-Footprint Gyroscope With Interchangeable Whole-Angle And Rate Operation

The invention is a compact, degenerate mode gyroscope capable of achieving high Q-factor in both whole-angle and rate operation modes.

Methods of Self-Calibration for Coriolis Vibratory Gyroscopes

The levels of long-term instabilities in bias and scale factor are key characteristics for the utilization of gyroscopes in many practical applications in navigation, positioning, and targeting systems. The inventors at UCI have developed two methods for gyroscope calibration: 1) Utilizing the mechanical quadrature error and 2) Utilizing the voltages of amplitude gain control (AGC) of the drive-mode. The new methods have been combined with feedback signals from a third technique, Side-Band Ratio (SBR) detection, to produce bias stability of 0.1 deg/hr after 300 seconds that is maintained for over 3 hours.

Method of simultaneously and directly generating an angular position and angular velocity measurement in a micromachined gyroscope

The invention is in the field of MEMS gyroscopes capable of simultaneous measurement of angular position and angular rate. A sensor is fabricated with micron feature sizes capable of simultaneously measuring absolute angles of rotation and angular rotational rates. The measurements are made directly from the position and velocity of the device without the need for electronic integration or differentiation. The device measures angle directly, avoiding the integration of electronic errors and allowing for higher performance in attitude measurement. These performance improvements and flexibility in usage allow for long term attitude sensing applications such as implantable prosthetics, micro-vehicle navigation, structural health monitoring, and long range smart munitions. Through the fabrication of the device using lithographic methods, the device can be made small and in large qualities, resulting in low costs and low power consumption.

Robust Six Degree-Of-Freedom Micromachined Gyroscope With Anti-Phase Drive Scheme

The invention relates to the field of micromachined gyroscopes and accelerometers, and in particular to designs for anti-phase devices to compensate for fabrication and environmental variations. A method of operating an anti-phase six degree-of-freedom tuning fork gyroscope system comprises the steps of driving a first three degree-of-freedom gyroscope subsystem, and driving a second three degree-of freedom gyroscope subsystem in an anti-phase mode with the first gyroscope subsystem at an anti-phase resonant frequency. Acceleration or an angular rate of motion is sensed by the first and second three degree-of-freedom gyroscope subsystems operating in a flat frequency response range where the anti-phase resonant frequency is designed. Response gain and phase are stable and environmental and fabrication perturbations are avoided by such operation. A anti-phase six degree-of-freedom tuning fork gyroscope system which operates as described is also characterized.

Micromachined Gyroscopes with Two Degrees of Freedom Sense-Mode Oscillator

The invention relates to the field of micromachined gyroscopes, and in particular to inertial micromachined transducers for measurement of angular rotation rate of an object. A three-degrees of freedom (DOF) MEMS inertial micromachined gyroscope with nonresonant actuation with a drive direction, sense direction and a direction perpendicular to the drive and sense directions comprises a planar substrate, a 2-DOF sense-mode oscillator coupled to the substrate operated at a flattened wide-bandwidth frequency region, and a 1-DOF drive mode oscillator coupled operated at resonance in the flattened wide-bandwidth frequency region to achieve large drive-mode amplitudes.

Micro-Glassblown 3-D Coriolis Vibratory MEMS Gyroscope

Micro-glassblowing batch fabrication process for 3-D MEMS gyroscope

Patterning Silica Islands Onto Thermoplastic Shrink Film

Biosensors have a variety of applications from glucose monitoring to drug discovery. The ability to detect low concentration of analytes in biological samples is important for creating effective biosensors. Researchers at UCI have developed a novel lithographic method for capturing, concentrating, and identifying biological agents.

Energy Efficient Trigger Word Detection via Accelerometer Data

Researchers at the University of California, Davis have developed an energy-efficient voice monitoring technique for smart devices, such as smartphones and wearables, based on accelerometer data.

Individual Identity Verified Through Device-Free, WiFi Based Framework

Researchers at the University of California, Davis have developed a device-free, WiFi based framework that can isolate individual identity, from a small group of users, simply by observing variations in WiFi signals through a user’s gait.

Fully Balanced Micro-Machined Inertial Sensor

· New balanced Coriolis vibratory gyroscope architecture · Features: o Force and torque balanced on both x and y modes o Vibration immunity for gyroscope architecture o High Q-factor on both modes o Simple construction o 1-2 orders of magnitude lower ARW or white noise output

Zero-Quiescent Power Transceiver

Trillions of sensors are envisioned to achieve the potential benefits of the internet of things.  Realizing this potential requires wireless sensors with low power requirements such that there might never be a need to replace a sensor’s power supply (e.g. battery) over the lifetime of that device.  The battery lifetime of wireless communications devices is often governed by power consumption used for transmitting, and therefore transmit power amplifiers used in these devises are important to their commercial success.  The efficiencies of these power amplifiers are set by the capabilities of the semiconductor transistor devices that drive them.  To achieve improved efficiencies, researchers at UC Berkeley have developed a novel method and structure for realizing a zero-quiescent power trigger sensor and transceiver based on a micromechanical resonant switch.  This sensor/transceiver is unique in its use of a resonant switch (“resoswitch”) to receive an input, amplify it, and finally deliver power to a load.  This novel technology also greatly improves short-range communication applications, like Bluetooth.  For example, with this technology, interference between Bluetooth devices would be eliminated.  Also, Miracast would work, despite the presence of interfering Bluetooth signals.

Methods for Fabrication of Electric Propulsion Tips

The technology is a method for fabrication of silicon microfabricated emitter tips.This process has two-step etching process which utilizes field emission electric propulsion (FEEP) and indium propellant.

Video Frame Synchronization for A Federation of Projector Using Camera Feedback

The technology is a video frame synchronization technique for multiple projector displays.It features technique based on camera feedback and works by adjusting frame display times between projectors.It allows for collaborative displays between resource limited devices.

Microfabrication of High Quality 3-D Structures Using Wafer-Level Glassblowing of Fused Quartz and Ultra Low Expansion Glasses

Micro-glassblowing MEMS fabrication process for low expansion and low loss materials

UltraSPI: A Serial Bus Interface to Enable High-Performance and Energy-Efficient Data Logging

This technology features new serial bus interface module for constrained sensor systems.It features better matches flashed-based storage devices read and write performance and augments existing flash-based storage with non-volatile RAM.Additionally, user can enable slave to slave transfer and read caching and buffering while flushing with faster speed and lower energy overhead.

Lever Mechanisms for Anti-phase Mode Isolation in MEMS Tuning-fork Structures

The technology is a design structures for mode isolation in tuning fork structures on MEMS vibratory sensors.It features two coupling design structures added to tuning fork structure.The device separates in-phase and anti-phase mode tuning fork resonances by raising the in-phase resonance over the anti-phase resonance.

A Neuromorphic Robot that Interacts with People Through Tactile Sensing and Bi-directional Learning

The device is an interactive neuromorphic robot, using to mimic neuro-biological architectures and learning.Properties include:a spiking neural network to control robot behavior, inexpensive parts which are easily available, and two-way learning and behavior shaping.The technology is autonomous, highly mobile, and includes on-board measurement equipment.

Cacophony: A Framework for Next Generation Software Sensors

The technology is a software architecture for providing robust predictions for software systems from cloud sourced data points. Properties include:the ability to “wrap” existing software sensors with additional services. The technology is used by executing software on a cloud based server and manipulating data points from user update systems, such as Waze, and provide predictive services around these data points.

Model-based System for Rapid Post-disaster Health Monitoring and Damage Detection of Civil Infrastructure

Current systems for structural health monitoring use a sensing network and a basic data analyzer to measure different response parameters of the structure. When any of the response parameters exceed a predefined threshold, the system automatically sends out warning signals, as illustrated in Figure 1. This type of systems suffers from the following important drawbacks:1. This type of systems only measures the global responses of the structure (e.g., maximum displacement of the floors relative to the base level). Considering the complexity of the structural system behavior, these global measurements can miss key information about the true state of damage in the structure and the structural serviceability.                                Figure 1: Current system for structural health monitoring.2. Since this type of system is not model-based, it cannot provide any detailed information on the location, type, severity, and extent of damage. As a consequence, this type of system is only useful to determine whether the building should be evacuated for further inspection or can continue operation. This type of system may be prove to false negative readings though, implying a structure is safe when it actually may not be. 3. Increasing the accuracy of this type of systems requires deployment of a dense sensing network (i.e., using large numbers of different sensors to monitor the response of all parts, sub- assemblies, and components of the structure), which is an impractical solution. The dense sensing network results in high installation and maintenance costs and reduced system robustness due to possible sensor mal-functioning or erroneous reading.Currently, the only applicable and useful method for monitoring the state of health of civil structures and identifying the potential damages after a catastrophic event is visual screening and inspection, which is a subjective, time-consuming, and expensive. An accurate inspection sometimes requires destruction of architectural and nonstructural components such as claddings, partition walls, facades, and removal of contents or equipment. Moreover, visual inspection cannot be performed during the short critical time following a catastrophic event such as an earthquake, during which the fast and accurate evaluation of the state of health and serviceability of critical structures such as hospitals and bridges are vital. 

Digital Oscillator Method to Implement Non-Contact Sensors for Gesture Detection Displays

Researchers in the UCLA Department of Electrical Engineering have invented an oscillator and frequency counter method for highly-sensitive non-contact gesture detection based on the Theremin patent and updated by implementing modern digital electronics.

AUTOMATIC FEEDBACK OF STUDENT WORK USING SMARTPENS

With school budgets tightening and class sizes increasing, less resources are available for educators to assess the learning of their students.  Online education offers the potential to address these concerns, but the inability to quickly and easily assess student performance and provide feedback to a large audience of students, holds back this resource.     

High-sensitivity Angular Interferometer

Researchers at the University of California, Berkeley have developed an invention that consists of an angular interferometer able to measure angle variations of a coherent, collimated light source with an accuracy below 30 nrad. The optical setup is compact and consists of a few simple optical components. The novelty of this innovation lies in the use of a simple, cost-effect technique to amplify the sensitivity of the instrument. The disclosed invention is in principle capable of being integrated into more compact, high-sensitivity commercial instruments for a fraction of the cost of current, state-of-the-art instruments (currently exceeding $30,000).   Commercial devices used to measure the angular deviation of a single beam include autocollimators and interferometers. The highest resolution offered by a commercial system is 25 nrad. The disclosed angular interferometer is able to measure relative angle variations (of a sample beam relative to a reference beam) below 30 nrad, though the resolution is known to currently be limited by the specific details of the current application and can therefore be further reduced with minor, inexpensive improvements.

  • Go to Page: