fARSHID sALEMI pARIZI

 
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I am a Ph.D. student at the University of Washington, advised by Shwetak Patel in the Ubiquitous Computing (UbiComp) lab. My research focuses on developing novel sensing solutions that enhance existing sensors in the environment and uncover new opportunities for dedicated sensing solutions. Specifically, I am interested in enabling high precision and low-cost sensing on everyday objects. Using my diverse skillset in signal processing, embedded system design, physical prototyping, and analog hardware design, I am always interested in tackling the most challenging research questions in user interactions and tracking.

 
 

PUBLICATIONS

2019

The ability to track handheld controllers in 3D space is critical for interaction with head-mounted displays, such as those used in virtual and augmented reality systems. Today’s systems commonly rely on dedicated infrastructure to track the controller or only provide inertial-based rotational tracking, which severely limits the user experience. Optical inside-out systems offer mobility but require line-of-sight and bulky tracking rings, which limit the ubiquity of these devices. In this work, we present Aura, an inside-out electromagnetic 6-DoF tracking system for handheld controllers. The tracking system consists of three coils embedded in a headmounted display and a set of orthogonal receiver coils embedded in a handheld controller. We propose a novel closed-form and computationally simple tracking approach to reconstruct position and orientation in real time. Our handheld controller is small enough to fit in a pocket and consumes 45mW of power, allowing it to operate for multiple days on a typical battery. An evaluation study demonstrates that Aura achieves a median tracking error of 5.5mm and 0.8° in 3D space within arm’s reach.

The ability to track handheld controllers in 3D space is critical for interaction with head-mounted displays, such as those used in virtual and augmented reality systems. Today’s systems commonly rely on dedicated infrastructure to track the controller or only provide inertial-based rotational tracking, which severely limits the user experience. Optical inside-out systems offer mobility but require line-of-sight and bulky tracking rings, which limit the ubiquity of these devices. In this work, we present Aura, an inside-out electromagnetic 6-DoF tracking system for handheld controllers. The tracking system consists of three coils embedded in a headmounted display and a set of orthogonal receiver coils embedded in a handheld controller. We propose a novel closed-form and computationally simple tracking approach to reconstruct position and orientation in real time. Our handheld controller is small enough to fit in a pocket and consumes 45mW of power, allowing it to operate for multiple days on a typical battery. An evaluation study demonstrates that Aura achieves a median tracking error of 5.5mm and 0.8° in 3D space within arm’s reach.

Aura: Inside-out Electromagnetic Controller Tracking

Farshid Salemi Parizi*, Eric Whitmire*, Shwetak Patel

(*Co-primary authors)

17th ACM International Conference on Mobile Systems, Applications, and Services (MobiSys), 2019

2018

Neglected toilet overflow can cost thousands of dollars. We propose RoyalFlush: a novel non-invasive overflow system meant to detect such events in their early stages and prevent them from escalating. RoyalFlush uses a floating capacitive sensing technique that relies on the sizable difference between the dielectric constants of water and air for tracking changes in the water level. Capacitive sensing in this way does not require any hardware inside the toilet bowl.

Neglected toilet overflow can cost thousands of dollars. We propose RoyalFlush: a novel non-invasive overflow system meant to detect such events in their early stages and prevent them from escalating. RoyalFlush uses a floating capacitive sensing technique that relies on the sizable difference between the dielectric constants of water and air for tracking changes in the water level. Capacitive sensing in this way does not require any hardware inside the toilet bowl.

RoyalFlush: Non-invasive Water Level Monitoring to Prevent Toilet Overflows

Farshid Salemi Parizi, Josh Fromm, Shantanu Deshpande, Shwetak Patel

Proceedings of the ACM 8th International Conference on the Internet of Things, (IoT 2018)

Internet of Things (IoT) applications and platforms are becoming increasingly prevalent. To alleviate recurrent battery replacement and maintenance, we propose a novel battery-free, stick-on capacitive energy harvester that harvests the stray electric field generated around AC power lines without an ohmic connection to earth ground reference, thereby obviating the need for cumbersome scraping of paint on concrete walls or digging a earth ground plate. Furthermore, our harvester does not require any appliance or load to be operating on the power line and can continuously harvest power after deployment.

Internet of Things (IoT) applications and platforms are becoming increasingly prevalent. To alleviate recurrent battery replacement and maintenance, we propose a novel battery-free, stick-on capacitive energy harvester that harvests the stray electric field generated around AC power lines without an ohmic connection to earth ground reference, thereby obviating the need for cumbersome scraping of paint on concrete walls or digging a earth ground plate. Furthermore, our harvester does not require any appliance or load to be operating on the power line and can continuously harvest power after deployment.

CapHarvester: A Stick-on Capacitive Energy Harvesting Using Stray Electric Field

Farshid Salemi Parizi*, Manoj Gulati*, Eric Whitmire, Sidhant Gupta, Shobha Sundar Ram, Amarjeet Singh, Shwetak Patel

(*Co-primary authors)

Proceedings of the ACM on Interactive, Mobile, Wearable and Ubiquitous Technologies (IMWUT), 2018

2016

Knowledge of energy flow in a microwatt-class energy harvesting system is essential to reliable deployment and scheduling of sensing, computation, communication, and actuation tasks. However, existing techniques for monitoring energy flow fail to meet the basic requirements for in-situ realtime monitoring systems by failing to be efficient and failing to perform accurately across a wide dynamic range. UMonitor, makes use of a highly power-optimized “Coulomb counting” implementation to achieve less than 1.7 microampere current draw, 94% efficiency in-situ, and high energy flow measurement accuracy across four orders of magnitude.

Knowledge of energy flow in a microwatt-class energy harvesting system is essential to reliable deployment and scheduling of sensing, computation, communication, and actuation tasks. However, existing techniques for monitoring energy flow fail to meet the basic requirements for in-situ realtime monitoring systems by failing to be efficient and failing to perform accurately across a wide dynamic range. UMonitor, makes use of a highly power-optimized “Coulomb counting” implementation to achieve less than 1.7 microampere current draw, 94% efficiency in-situ, and high energy flow measurement accuracy across four orders of magnitude.

UMonitor: In-situ Energy Monitoring with Microwatt Power Consumption

Saman Naderiparizi, Aaron N.Parks, Farshid Salemi Parizi, Joshua R.Smith

IEEE RFID 2016 Best Paper Nominee (Top 3 papers)

NEWS

  • june 2019: Started intership at facebook reality labs in redmond

  • March 2019: Aura got accepted to mobisys 2019.

  • MARCH 2019: farshid salemi parizi won The UW Reality Lab 2019 Research Proposal Competition. More…

  • OCT 2018: ATTENDED ACM Iot conference in santa barbara.

  • MARCH 2018: Eric whitmire and farshid salemi parizi won The UW Reality Lab 2018 Research Proposal Competition. More…

TEACHING

University ofWashington

CSE 475, Embedded Systems Capstone (Lead Lab Assistant for Shwetak Patel)

EE 371, Design of Digital Circuits and Systems (Lead Lab Assistant for Allan Ecker)

Sharif University of Technology

Analog Electronics (CAD instructor for Fotowat Ahmady)

Principals of Electronics ( CAD instructor for Sharif Bakhtiar)

CONTACT ME