Kristofer S.J. Pister (Advisor)

Research Advised by Professor Kristofer S.J. Pister

Pister Group:  List of Projects | List of Researchers

BPN348: Subterranean Wireless Sensor Network

Ryan Xie
David Doolin
Valerie Zimmer
Michelle Ma

Our long term goal is to prototype and evaluate a reliable, self-healing wireless mesh sensor network for use in mines, caves, and underground storage facilities. Its primary application will be to monitor the physical environment, such as temperature, humidity and barometric pressure, as well as detection of potentially hazardous gases such as carbon monoxide (CO), carbon dioxide (CO2), and methane (CH4). We will evaluate the feasibility of using real-time wireless sensor networks to monitor operating environments and to provide hazard identification and warning. An important aspect...

BPN347: Smart Flea

Subramaniam Venkatraman

Behavior monitoring of animals is of interest to pharmaceutical firms which perform animal testing during the development of drugs. Behavior monitoring using a wireless accelerometer strapped to the animal is explored in this project. Since rats are the animal used in this study, it is essential that the wireless accelerometer meet some stringent weight and size requirements. A prototype wireless accelerometer has been developed which comprises of a 3-axes accelerometer, wireless transceiver, microcontroller, voltage regulator, switch, antenna and battery. It weighs 10.2 grams and is...

KSJP31: 3nJ/bit 2.4GHz CMOS RF Transceiver

Benjamin Cook

The goal of this project is to make dust-sized, wearable, autonomous wireless sensor nodes practically realizable by substantially reducing the power demands of the system's most power hungry section; the RF circuits. To that end, a novel RF transceiver capable of delivering adequate performance for sensor networks while consuming remarkably little power has been developed. Substantial power reduction in the RF circuits will shrink the size of battery required to sustain an autonomous sensor node. The goals for power consumption are dependent on the particular requirements placed on...

BPN339: Solid Propellant Micro-Thruster

Erika Parra

The objective of this research is to design, fabricate, and test a one-time deployment, high efficiency, milli- to sub-millimeter scale micro-thruster.

Project end date: 07/25/07

KSJP4: Microrobots

Sarah Bergbreiter

Our goal is to create a class of autonomous microrobots with a volume of less than 1cm3. We previously reported an autonomous micromachined silicon legged robot which took its first steps. The body of the robot was fabricated in a planarized silicon-on-insulator (SOI), two-layer polysilicon process and was 8 mm x 4 mm x 0.3 mm in size. The complete robot had two additional ICs, a solar cell and high voltage buffer chip along with a low-voltage CMOS chip for sequencing. However, due to the processing complexity and fragility of these robots, we are investigating new processing and...

KSJP30/JD: Electrometrology with MEMS

David Garmire
Hyuck Choo

Practical analysis techniques to accurately measure geometric, dynamic, and material properties of MEMS will be developed. Analytical methods and test structures will be made to extract over two dozen properties by electric probing in a minimal chip area. Geometric properties will include fabrication error with respect to layout geometry such as beam widths, gap spacings, etch holes, and beam lengths. Dynamic properties will include mass, damping, stiffness, bulk compliance, quality factor, exponential damping factor, displacement amplitude, velocity amplitude, comb drive force, and...

KSJP27/JD: MEMS Design Synthesis and Optimization

Corie L. Cobb

The goal of this project is to create useful, efficient design synthesis tools for MEMS devices. Design synthesis helps engineers develop rapid, optimal configurations for a given set of performance and constraint guidelines. The current MEMS design synthesis tool is based on a case-based design library and uses variant optimization techniques for adapting old designs to new design problems. The design synthesis tool recommends the initial designs to the designer based on the given design specifications and further optimizes the design parameters to satisfy the design performance...

BPN415: Localization of Footsteps through Ground Vibrations

Travis Massey

Target localization, the ability to determine the location of a target, is becoming increasingly attractive for purposes of security and automation. Vibrational localization is the method of sensing and calculating the target’s location using vibrations transmitted through the ground. This method of localization does not require a line of sight to the target, is not limited by dilution of precision, and can detect any moving object or person. Vibrational localization was formerly restricted by the noise performance and sensitivity limitations of accelerometers and other circuit...

KSJP28: Location Estimation Using RF Time of Flight

Steven Lanzisera

An enabling technology for large scale sensor networks is the ability to determine a sensor node’s location after deployment. Some applications, such as inventory management, use sensors that move regularly, and this spatial information is crucial to the network's operation. A device to wirelessly measure the distance between two network nodes using an RF transceiver will be developed. The distance measurement is performed by calculating a cross correlation between a received and an expected signal. Methods for reducing the effects of noise, clock offset and multipath propagation...

BPN506: Wireless Physician Tracking

Samuel Zats
Steven Lanzisera

Healthcare associated infections result in over 90,000 deaths at a cost of $4.5 – 5.7 billion annually. The Physician Tracking Project seeks to create a wireless sensor network which tracks the activity of physicians within a clinic. The system will log and notify physicians if he or she has approached a patient without the reapplication or cleansing of the hands. The project is in support and collaboration with the UC Davis Medical Center.

Project end date: 08/12/09