Chang Z Zhang

US Patent:

7458266, Dec 2, 2008

Filed:

Feb 16, 2005

Appl. No.:

11/060650

Inventors:

Shawn J. Beard - Livermore CA, US
Xinlin Qing - Cupertino CA, US
Hian Leng Chan - Cupertino CA, US
Chang Zhang - Santa Clara CA, US

Assignee:

Samsung Electronics Co. Ltd. - Gyeonggi-do

International Classification:

G01N 29/04
G01B 17/00

US Classification:

73579, 73789, 73801, 702 39

Abstract:

A sensor network is attached to a structure and employed to detect and analyze load changes. The sensor network has transducers, capable of acting as both passive sensors and active actuators, integrated within it. In a passive mode, the transducers detect load changes upon the structure, such as impacts. Upon detection of a load change, the transducers are engaged in an active mode to actively scan the impact area to determine the location and size of any resulting damage region. In this manner, passive and active systems are integrated within a single, convenient layer that possesses the best features of both active systems and passive systems.

US Patent:

7488015, Feb 10, 2009

Filed:

Dec 22, 2004

Appl. No.:

11/017717

Inventors:

Yan Lu - Freising, DE
Xinlin Qing - Mountain View CA, US
Chang Zhang - Sunnyvale CA, US
Irene Jhi-Sue Li - Stanford CA, US

Assignee:

Bayerische Motoren Werke Aktiengesellschaft - Munich

International Classification:

B60R 21/0136
B60R 21/34

US Classification:

293117, 29618703, 29618704, 29618709

Abstract:

Systems and methods for pedestrian impact detection are provided. Piezoelectric sensor elements detect an object impacting a vehicle. The detected signal is attenuated and filtered. The attenuated and filtered signal is analyzed in the frequency domain to determine whether the object which impacted the vehicle is a pedestrian. If the object which impacted the vehicle is a pedestrian, then a pedestrian protection system is deployed.

US Patent:

7881215, Feb 1, 2011

Filed:

Sep 30, 2004

Appl. No.:

10/955890

Inventors:

Russell L. Daigle - San Jose CA, US
Reinaldo Penno - Nashua NH, US
Chang Tony Zhang - Winchester MA, US
Thomas Bastian - Heidelberg, DE
Ying Liu - Wilmington MA, US
Christopher Payson - Bradford NH, US
Donald Emond - Boxboro MA, US

Assignee:

Avaya Inc. - Basking Ridge NJ

International Classification:

H04L 12/26

US Classification:

370252, 709224

Abstract:

The present invention provides systems and methods enabling network nodes to process data in a more efficient manner. In one aspect, the present invention analyzes data processed in a network node and determines whether the data requires processing in a stateful mode. If the data does not require processing in a stateful mode, the present invention processes the data in a stateless mode thereby saving processing resources. Embodiments of the present invention permit selection of processing modes in both manual and dynamic manners. Further, the determination of whether to process data in a stateful or a stateless mode may be made in response to various stimuli.

US Patent:

8244486, Aug 14, 2012

Filed:

Apr 29, 2009

Appl. No.:

12/432668

Inventors:

Chang Zhang - Santa Clara CA, US
Xinlin Qing - Cupertino CA, US
Irene Li - Stanford CA, US

Assignee:

Acellent Technologies, Inc. - Sunnyvale CA

International Classification:

G06F 19/00

US Classification:

702 42, 702 33, 702 55, 73761, 73799, 324242, 324240, 324658

Abstract:

Storage of information, such as baseline information and structure ID, in a memory that is mounted on the structure, rather than inside the diagnosis hardware. This allows for faster and more convenient information retrieval. In particular, this approach allows for a more modular system in which different diagnosis hardware or other analyzers can be simply plugged into a structure's sensor network, whereupon they can quickly download any desired structure-specific information (e. g. , baseline information, structure ID, and other useful information) from the on-structure memory.

US Patent:

8265889, Sep 11, 2012

Filed:

Aug 5, 2009

Appl. No.:

12/536429

Inventors:

Xinlin Qing - Cupertino CA, US
Chang Zhang - Santa Clara CA, US
Irene Li - Stanford CA, US
Fu-kuo Chang - Stanford CA, US
Hung Chi Chung - Santa Clara CA, US

Assignee:

Acellent Technologies, Inc. - Sunnyvale CA

International Classification:

G01R 31/307

US Classification:

702 58, 702 36, 702 39, 702183, 73579, 73583, 73628, 29600, 29825

Abstract:

A structural health monitoring system using ASICs for signal transmission, reception, and analysis. Incorporating structural health monitoring functionality into one or more ASICs provides a durable yet small, lightweight, low cost, and portable system that can be deployed and operated in field conditions. Such systems provide significant advantages, especially in applications such as armor structures.

US Patent:

8352201, Jan 8, 2013

Filed:

Feb 9, 2012

Appl. No.:

13/370099

Inventors:

Xinlin Qing - Cupertino CA, US
Chang Zhang - Santa Clara CA, US
Irene Li - Stanford CA, US
Fu-kuo Chang - Stanford CA, US
Hung Chi Chung - Santa Clara CA, US

Assignee:

Acellent Technologies, Inc. - Sunnyvale CA

International Classification:

G01R 31/307

US Classification:

702 58, 702 36, 702 39, 702183, 73587, 73862046, 73862041, 73594, 29600, 29825

Abstract:

A structural health monitoring system using ASICs for signal transmission, reception, and analysis. Incorporating structural health monitoring functionality into one or more ASICs provides a durable yet small, lightweight, low cost, and portable system that can be deployed and operated in field conditions. Such systems provide significant advantages, especially in applications such as armor structures.

US Patent:

8401804, Mar 19, 2013

Filed:

Jul 27, 2010

Appl. No.:

12/844735

Inventors:

Chang Zhang - San Jose CA, US

Assignee:

Acellent Technologies, Inc. - Sunnyvale CA

International Classification:

G01B 5/28

US Classification:

702 39

Abstract:

A trigger circuit for use with a structural health monitoring system. To save power, a structural health monitoring system is programmed with a sleep mode and a wake, or operational, mode. In its operational mode, the structural health monitoring system can perform its usual tasks, e. g. monitoring a structure and determining its structural health. In sleep mode, many functions are suspended, so that the system requires less power. The trigger circuit wakes the system when the sensors of the structural health monitoring system emit a sufficiently large signal, i. e. when an event occurs. That is, when not in use, the system enters sleep mode, and when some event occurs (e. g. , impact, or some other stresses that are of concern), the trigger circuit alerts the system, prompting it to shift from sleep mode to operational mode and to begin taking/analyzing data.

US Patent:

8639453, Jan 28, 2014

Filed:

Nov 25, 2009

Appl. No.:

12/626594

Inventors:

Xinlin Qing - Cupertino CA, US
Irene J. Li - Stanford CA, US
Chang Zhang - Santa Clara CA, US

Assignee:

Acellent Technologies, Inc. - Sunnyvale CA

International Classification:

G01B 3/44

US Classification:

702 34

Abstract:

A self-sufficient structural health monitoring system that can monitor a structure without need for external power input. Embodiments of the invention provide a structural health monitoring system with a power supply integrated within, so that the system relies on itself for operational power. Systems with such an on-board electrical power source, independent of an external power source (and in particular, independent of the power system(s) of the structure being monitored), are much more self-contained and self-sufficient.