公开(公告)号：US20140037909A1

公开(公告)日：2014-02-06

申请号：US13956702

申请日：2013-08-01

Applicant: Massachusetts Institute of Technology

Inventor： Muhammad A. Hawwa ,  Hussain Al-Qahtani ,  Hassen Ouakad ,  David E. Hardt ,  Joseph Edward Petrzelka ,  Brian Anthony

IPC: G01L9/00

CPC classification number: G01L9/0072 ,  Y10T428/24612 ,  Y10T428/31663 ,  Y10T428/31938

Abstract: A practical implementation of a flexible and transparent capacitive sensor is disclosed. The results show that, while PDMS is an inherently nonlinear material, linear behavior with minimal hysteresis can be obtained over an appropriately small range of operation. Moreover, high resolution has been achieved during these tests.

Abstract translation: 公开了灵活和透明的电容式传感器的实际实现。 结果表明，虽然PDMS是一种固有的非线性材料，但是在适当小的操作范围内可以获得具有最小滞后的线性行为。 此外，在这些测试中已经实现了高分辨率。

公开(公告)号：US20150219559A1

公开(公告)日：2015-08-06

申请号：US14609925

申请日：2015-01-30

Applicant: Massachusetts Institute of Technology

Inventor： Larissa F. Nietner ,  Scott T. Nill ,  David E. Hardt ,  Muhammad A. Hawwa ,  Hassen Ouakad ,  Hussain Al-Qahtani

IPC: G01N21/64 ,  B29C59/16

CPC classification number: G01N21/64 ,  B29C59/16 ,  B29L2009/005 ,  G01N2021/6497 ,  G03F7/0002

Abstract: System for visualization of conformal contact. The system visualizes conformal contact between a patterned stamp and a transparent impression surface. A patterned stamp is provided that includes a fluorescent structure for contact with the impression surface. A source of UV light is provided for transmission through the transparent impression surface to interact with the fluorescent structure to generate visible light re-emitted by the fluorescent structure. An imaging system captures the visible light to form a high-contrast image of an area of conformal contact between the patterned stamp and the impression surface. The high-contrast image comprises bright and dark regions representing contact and no contact respectively.

Abstract translation: 可视化保形接触系统。 系统可视化图案化印模和透明印模表面之间的共形接触。 提供了图案化的印模，其包括用于与印模表面接触的荧光结构。 提供UV光源以透过透明压印表面与荧光结构相互作用以产生由荧光结构重新发射的可见光。 成像系统捕获可见光以形成图案化印模和印模表面之间的共形接触区域的高对比度图像。 高对比度图像包括分别表示接触和不接触的明暗区域。

公开(公告)号：US11495858B2

公开(公告)日：2022-11-08

申请号：US16798782

申请日：2020-02-24

Applicant: KING FAHD UNIVERSITY OF PETROLEUM AND MINERALS ,  MASSACHUSETTS INSTITUTE OF TECHNOLOGY

Inventor： Muhammad A. Hawwa ,  Hussain M. Al-Qahtani ,  M. Wasim Raad ,  David E. Hardt

IPC: G06K7/10 ,  H02S50/00 ,  H01M50/20

Abstract: A photovoltaic (PV) cell health monitoring apparatus includes a Radio Frequency Identification (RFID) tag mounted to the PV cell and having identifying information of the PV cell, and a sensor in communication with the RFID tag for measuring health information of the PV cell. The RFID tag stores the measured health information together with time and locality information of the PV cell and responds to an interrogation signal by transmitting the stored information together with the identifying information. A dust sensor in the form of a comb-like electrode array measures electrical capacitance as an indication of an amount of dust on an exposed surface of the PV cell. An RFID tag antenna arranged as a meander-line patch antenna covered with polyethylene has a dual function as a temperature sensor.

公开(公告)号：US09678011B2

公开(公告)日：2017-06-13

申请号：US14609925

申请日：2015-01-30

Applicant: Massachusetts Institute of Technology

Inventor： Larissa F. Nietner ,  Scott T. Nill ,  David E. Hardt ,  Muhammad A. Hawwa ,  Hussain Al-Qahtani

IPC: G01N21/64 ,  B29C59/16 ,  G03F7/00 ,  B29L9/00

CPC classification number: G01N21/64 ,  B29C59/16 ,  B29L2009/005 ,  G01N2021/6497 ,  G03F7/0002

Abstract: System for visualization of conformal contact. The system visualizes conformal contact between a patterned stamp and a transparent impression surface. A patterned stamp is provided that includes a fluorescent structure for contact with the impression surface. A source of UV light is provided for transmission through the transparent impression surface to interact with the fluorescent structure to generate visible light re-emitted by the fluorescent structure. An imaging system captures the visible light to form a high-contrast image of an area of conformal contact between the patterned stamp and the impression surface. The high-contrast image comprises bright and dark regions representing contact and no contact respectively.

公开(公告)号：US20130337102A1

公开(公告)日：2013-12-19

申请号：US13916057

申请日：2013-06-12

Applicant: Massachusetts Institute of Technology

Inventor： David E. Hardt ,  Maia Reynolds Bageant ,  Joseph Edward Petrzelka

IPC: B29C59/02

CPC classification number: B29C59/02 ,  B30B1/003 ,  B30B15/007 ,  B30B15/064

Abstract: Precision embossing press. The press includes a rigid symmetric box frame and upper and lower parallel embossing platens mounted within the box frame for movement towards one another to provide an embossing compressive force on a work piece between the platens while maintaining parallelism between the platens. A thermal system controls platen temperature to heat the work piece for embossing and to cool the work piece for de-molding. A pneumatic actuator moves the lower platen toward the upper platen to emboss the work piece. A closed loop control system employing feedback and feed forward control loops controls platen temperatures and embossing force.

Abstract translation: 精密压花机。 压力机包括刚性对称框架和安装在盒框架内的上下平行压花压板，用于彼此相对运动，以在压板之间的工件上提供压花压缩力，同时保持压板之间的平行度。 热系统控制压板温度以加热工件以进行压花并冷却工件以进行脱模。 气动执行器将下压板移向上压板以压印工件。 采用反馈和前馈控制回路的闭环控制系统控制压盘温度和压花力。