Joseph R Paradiso

US Patent:

6404340, Jun 11, 2002

Filed:

Jun 19, 2000

Appl. No.:

09/596618

Inventors:

Joseph A. Paradiso - Medford MA

Assignee:

Massachusetts Institute of Technology - Cambridge MA

International Classification:

G08B 1314

US Classification:

3405725, 235449, 3405727

Abstract:

A preferred reader circuit for energizing the coils and detecting loading variations is shown in FIGS. A and B. It was designed for tabletop operation at relatively low frequencies; the amplitudes, frequencies, and time constraints listed below can be shifted as desired for other applications. The depicted schematic includes driver circuitry for three coils, it being understood that further drivers can be added as indicated in the figure. Each driver circuit includes an inductive bridge wherein a search coil , , is balanced against a series of reference inductors , , ; , , ; and , , (the latter being variable to trim residuals in the search coils inductance). A representative pair of search coils , are identically wound and driven together, and the sensing volume between them is once again indicated at. Coil may be one of another coil pair, or may instead be a non-aligned search coil used to resolve orientation-related ambiguities with respect to coils ,.

US Patent:

6662099, Dec 9, 2003

Filed:

May 22, 2001

Appl. No.:

09/862381

Inventors:

Ara N. Knaian - Cambridge MA
Joseph A. Paradiso - Medford MA

Assignee:

Massachusetts Institute of Technology - Cambridge MA

International Classification:

G08G 109

US Classification:

701117, 701118, 701115, 340905, 340917, 340933, 340941

Abstract:

A wireless, in-road traffic sensor system using sensors that are small, low-cost, and rugged. The sensors may be capable of measuring the speed of passing vehicles, identifying the type of passing vehicle and measuring information about roadway conditions, e. g. , wet or icy. The sensor includes a wireless transmitter and may be configured for installation beneath a roadway surface. The sensors may be configured as a traffic sensor system including distributed sensors across a roadway system, concentrators for receiving the sensor broadcasts and a central computer for accumulating and organizing the sensed information. The sensed information may also be made available responsive to user requests via the Web through such reports as traffic delays, alternate route planning and travel time estimates. Alternatively, the sensed information may also be used to control traffic through a traffic control means, such as a traffic signal.

US Patent:

7109865, Sep 19, 2006

Filed:

Sep 26, 2002

Appl. No.:

10/255557

Inventors:

Joseph A. Paradiso - Medford MA, US
Hongshen Ma - Cambridge MA, US
Andrew Benjamin Lippman - Salem MA, US

Assignee:

Massachusetts Institute of Technology - Cambridge MA

International Classification:

G08B 13/14

US Classification:

3405721, 3405723, 3405724, 340571, 3405731, 3405391, 34053913, 34082569

Abstract:

An identification tag identifies a unique item from among a plurality of items with a similar appearance. Tagged items are searched by scanning the items with an interrogation signal. The tag emits an observable signal to indicate when it receives an identification that matches the identification contained in the tag. When the reader's interrogation is not present, the tag either sleeps at a very low power level or is passively unpowered.

US Patent:

7429936, Sep 30, 2008

Filed:

Aug 26, 2004

Appl. No.:

10/926814

Inventors:

Joseph A. Paradiso - Medford MA, US
Mathew Joel Laibowitz - Cambridge MA, US

Assignee:

Massachusetts Institute of Technology - Cambridge MA

International Classification:

G08G 1/123

US Classification:

340988, 34053913

Abstract:

A distributed sensor networks employing mobile sensing nodes that are carried to desired locations by attaching themselves to moving hosts and detaching themselves when the host arrives at the desired location or is moving away from the desired location. Each sensing node may carry a plurality of environmental sensors and communicates with nearby sensing nodes using a short range wireless link. The node further carries a location sensing mechanism and uses either active, passive or attractive means to attach itself to a moving host.

US Patent:

7643015, Jan 5, 2010

Filed:

May 24, 2002

Appl. No.:

10/155874

Inventors:

Joseph A. Paradiso - Medford MA, US
Che King Leo - Cambridge MA, US
Nisha Checka - Cambridge MA, US

Assignee:

Massachusetts Institute of Technology - Cambridge MA

International Classification:

G06F 3/043

US Classification:

345177, 178 1804

Abstract:

Surface impacts are located and characterized based on an acoustic signal produced by the impact despite the presence of signal dispersion. Acoustic signals from the surface may be compared to acoustic signals detected external to the surface in order to eliminate spurious impact sensing due to external sounds. Low-frequency acoustic signals may be sensed and identified as explicit hard “bangs” which are of limited utility for pointing and tracking applications.

US Patent:

7864051, Jan 4, 2011

Filed:

Sep 18, 2006

Appl. No.:

11/522612

Inventors:

Joseph A. Paradiso - Medford MA, US
Hongshen Ma - Cambridge MA, US
Andrew Benjamin Lippman - Salem MA, US

Assignee:

Massachusetts Institute of Technology - Cambridge MA

International Classification:

G08B 13/14

US Classification:

3405721, 3405723, 3405724, 340571, 3405391, 34053913, 34082569, 340 1034

Abstract:

A quasi-passive wake-up function for an electronic device that employs a continuous low power standby mode compares a received signal to a predetermined signal and wakes up the device when the received signal is the same as the predetermined signal. An electronic device having a quasi-passive wakeup function includes a receiver for receiving at least one stimulus signal, a comparator for comparing the received signal to a predetermined signal, and at least one logic gate for waking up the electronic device when the received stimulus signal is the predetermined signal. In one application, identification tags are used to distinguish a unique tagged item from among a plurality of items with a similar appearance. When an interrogation signal is not present, the tags sleep at a very low power level.

US Patent:

7916128, Mar 29, 2011

Filed:

Jan 4, 2010

Appl. No.:

12/652024

Inventors:

Joseph A. Paradiso - Medford MA, US
Che King Leo - Cambridge MA, US
Nisha Checka - Cambridge MA, US

Assignee:

Massachusetts Institute of Technology - Cambridge MA

International Classification:

G06F 3/043

US Classification:

345177, 178 1804

Abstract:

Surface impacts are located and characterized based on an acoustic signal produced by the impact despite the presence of signal dispersion. Acoustic signals from the surface may be compared to acoustic signals detected external to the surface in order to eliminate spurious impact sensing due to external sounds. Low-frequency acoustic signals may be sensed and identified as explicit hard “bangs” which are of limited utility for pointing and tracking applications.

US Patent:

7924160, Apr 12, 2011

Filed:

Mar 7, 2007

Appl. No.:

11/715110

Inventors:

Jason M. LaPenta - Waltham MA, US
Joseph A. Paradiso - Medford MA, US

Assignee:

Massachusetts Institute of Technology - Cambridge MA

International Classification:

G08B 13/14
G08B 1/08

US Classification:

3405724, 34053913, 310313 B

Abstract:

A system for tracking the position of multiple objects in three dimensional space by transmitting radar interrogation signals having predetermined wave shapes to surface acoustic wave transducers attached to each object. Each transducer includes a unique electrically conductive pattern on one surface of a piezoelectric substrate for selectively responding to the predetermined wave shape of one of the interrogation signals for inducing a surface acoustic wave in the substrate and for thereafter transforming the surface acoustic wave into an electromagnetic response signal having detectable properties that uniquely identify said transducer. The location of each transducer is estimated by measuring the time-of-flight or angle-of-arrival of the radar signals at several measurement stations and producing a position estimate by triangulation.