公开(公告)号：US10228319B2

公开(公告)日：2019-03-12

申请号：US15328244

申请日：2015-08-18

Applicant: 3M INNOVATIVE PROPERTIES COMPANY

Inventor： Richard L. Rylander ,  Andrew P. Bonifas ,  David P. Erickson ,  Jia Hu ,  Stephen J. Willett ,  Chaodi Li ,  Orlin B. Knudson

IPC: G01N19/10 ,  G01K7/32 ,  G01K7/36 ,  G01K11/06

Abstract: Some aspects of the present disclosure feature a system for sensing a change in environment comprising a MMR sensor and a reader. The MMR sensor is configured to be disposed in the environment. The MMR sensor comprises a magnetic bias layer, a resonator, a spacer, and an environmental change receptor. The reader is configured to measure a frequency characteristic of the MMR sensor after the environmental variable changes and the change to the environmental variable is evaluated based on the frequency characteristic.

公开(公告)号：US20170276647A1

公开(公告)日：2017-09-28

申请号：US15504244

申请日：2015-08-25

Applicant: 3M INNOVATIVE PROPERTIES COMPANY

Inventor： Orlin B. Knudson ,  Jia Hu ,  Chaodi Li ,  Richard L. Rylander ,  Cheryl Lee Senger Elsbernd ,  Stephen J. Willett ,  Andrew P. Bonifas

IPC: G01N29/24 ,  G01K7/32 ,  G01K11/06 ,  A61L2/28 ,  G01N27/02 ,  G01K3/04 ,  G01N29/036 ,  G01K7/36

CPC classification number: G01N29/2412 ,  A61L2/28 ,  G01K3/04 ,  G01K7/32 ,  G01K7/36 ,  G01K11/06 ,  G01N27/026 ,  G01N29/036 ,  G01N2291/0256 ,  G01N2291/02863

Abstract: Some aspects of the present disclosure feature a sensing device (e.g. for temperature, moisture or detection of substances) comprising a magnetic bias layer, a resonator, a spacer, and an environmental change receptor. The spacer is disposed between the magnetic bias layer and the resonator. At least one of the resonator surfaces has a predefined channel. The environmental change receptor is disposed proximate to the predefined channel. In response to a change in environment, the environmental change receptor distributes along a part of the channel.

公开(公告)号：US09666883B2

公开(公告)日：2017-05-30

申请号：US14391549

申请日：2013-03-19

Applicant: 3M INNOVATIVE PROPERTIES COMPANY

Inventor： Orlin B. Knudson ,  Daniel M. Pierpont ,  James F. Poch

IPC: G01R31/08 ,  G01N27/82 ,  H01M8/04 ,  H01M8/1004 ,  H01M8/04537 ,  H01M8/04664 ,  G01R19/00 ,  H01M4/86

CPC classification number: G01N27/02 ,  G01R19/0084 ,  G01R19/0092 ,  H01M4/86 ,  H01M8/02 ,  H01M8/04 ,  H01M8/04544 ,  H01M8/04574 ,  H01M8/04664 ,  H01M8/1004

Abstract: A method for assessing the quality of a membrane electrode assembly (MEA), the method comprising: applying a first voltage across the thickness of a first (MEA) passed through a nip of a first pair of rollers thereby providing a first charge to the first MEA; determining a first electrical figure of merit (FOM) of the first charged MEA at a first period of time; after the first period of time applying a second voltage across the thickness of the first (MEA) passed through a nip of a second pair of rollers thereby providing a second charge to the first (MEA); determining a second electrical (FOM) of the second charged first (MEA) at a second, later period of time; and calculating a total electrical (FOM) using the first and second electrical (FOM); and comparing the total electrical (FOM) to a predetermined quality value to assess the quality of the first (MEA).