Rahul Bhattacharyya

US Patent:

20120260728, Oct 18, 2012

Filed:

Mar 22, 2012

Appl. No.:

13/426676

Inventors:

Rahul Bhattacharyya - Cambridge MA, US
Christian Floerkemeier - Zurich, CH
Daniel Deavours - Lawrence KS, US
Sanjay E. Sarma - Lexington MA, US

Assignee:

Massachusetts Institute of Technology - Cambridge MA

International Classification:

G01F 23/284

US Classification:

73290 V

Abstract:

Fluid level sensor. The sensor includes first and second RFID tag antennas disposed in spaced-apart relation on the outside of a container including fluid therein. An RFID reader transmits power to, and receives backscatter power from, the first and second RFID tag antennas. A difference in backscatter power from the first and second tag antennas indicates the presence of fluid behind the second RFID tag antenna. In another aspect, a single RFID tag antenna is disposed on the outside of a container including fluid therein. An RFID reader transmits power over a selected range of frequencies to the tag antenna and receives backscatter power from the tag antenna. The tag response across all frequencies in the selected range indicates no liquid in the container while tag response in only the higher frequencies of the selected range indicates presence of fluid in the container.

US Patent:

20200078228, Mar 12, 2020

Filed:

Sep 11, 2019

Appl. No.:

16/567054

Inventors:

- Cambridge MA, US
Rahul Bhattacharyya - Portland ME, US
Joshua E. Siegel - Brookline MA, US
Sai Nithin Reddy Kantareddy - Cambridge MA, US
Alex Armengol Urpi - Sant Sadurni d'Anoia, ES
Pankhuri Sen - Cambridge MA, US

International Classification:

A61F 13/42
G06K 7/10
G06K 19/07

Abstract:

An ultra-high frequency (UHF) wireless sensor includes an agent activated non-metal antenna formed of a conductive stimuli-responsive hydrogel material. A radio frequency identification (RFID) tag in electronic communication with the non-metal antenna includes a wireless data communication integrated circuit (IC). The non-metal antenna is configured to be inactive prior to an interaction with an activating agent and active upon the interaction with the activating agent.

US Patent:

20180003593, Jan 4, 2018

Filed:

Jun 30, 2017

Appl. No.:

15/639192

Inventors:

- Cambridge MA, US
Rahul Bhattacharyya - South Portland ME, US

International Classification:

G01M 17/02
G01S 19/14
G01H 17/00
B60C 23/02
G07C 5/08
B60C 11/24

Abstract:

A computer-based method to facilitate detecting wheel imbalance, a tire pressure problem, or excessive tread wear on tires of a moving vehicle is disclosed. The method includes collecting (e.g., from an accelerometer of a mobile personal computing device) data that represents vibration that results, at least in part, from the vehicle's motion, and determining, with a computer-based processor, whether the moving vehicle has wheel imbalance, a tire pressure problem, and/or excessive tire tread wear based at least in part on the vibration data produced by the accelerometer (and, possibly other data), where the mobile personal computing device and the accelerometer are moving with the vehicle when the data is being collected.