公开(公告)号：US11635402B2

公开(公告)日：2023-04-25

申请号：US17510999

申请日：2021-10-26

Applicant: Purdue Research Foundation

Inventor： Sarath Gopalakrishnan ,  Jose Waimin ,  Rahim Rahimi ,  Nithin Raghunathan

IPC: G01N27/22 ,  G01N33/24

Abstract: A batteryless, chipless, sensor is disclosed which includes a substrate, at least two conductive strips disposed on the substrate, a passivation layer encasing the substrate and the at least two conductive strips, wherein the conductive strips are adapted to respond to an interrogation signal from a reader having a first polarization, with a response signal at a second polarization different than the first polarization.

公开(公告)号：US20230221274A1

公开(公告)日：2023-07-13

申请号：US18123042

申请日：2023-03-17

Applicant: Purdue Research Foundation

Inventor： Sarath Gopalakrishnan ,  Jose Waimin ,  Rahim Rahimi ,  Nithin Raghunathan

IPC: G01N33/24 ,  G01N27/22

CPC classification number: G01N33/246 ,  G01N27/223 ,  G01N2033/245

Abstract: A batteryless, chipless, sensor is disclosed which includes a substrate, at least two conductive strips disposed on the substrate, a passivation layer encasing the substrate and the at least two conductive strips, wherein the conductive strips are adapted to respond to an interrogation signal from a reader having a first polarization, with a response signal at a second polarization different than the first polarization.

公开(公告)号：US20220128504A1

公开(公告)日：2022-04-28

申请号：US17510999

申请日：2021-10-26

Applicant: Purdue Research Foundation

Inventor： Sarath Gopalakrishnan ,  Jose Waimin ,  Rahim Rahimi ,  Nithin Raghunathan

IPC: G01N27/22 ,  G01N33/24

Abstract: A batteryless, chipless, sensor is disclosed which includes a substrate, at least two conductive strips disposed on the substrate, a passivation layer encasing the substrate and the at least two conductive strips, wherein the conductive strips are adapted to respond to an interrogation signal from a reader having a first polarization, with a response signal at a second polarization different than the first polarization.

公开(公告)号：US12117413B2

公开(公告)日：2024-10-15

申请号：US18123042

申请日：2023-03-17

Applicant: Purdue Research Foundation

Inventor： Sarath Gopalakrishnan ,  Jose Waimin ,  Rahim Rahimi ,  Nithin Raghunathan

IPC: G01N27/22 ,  G01N33/24

CPC classification number: G01N27/223 ,  G01N33/246 ,  G01N33/245

Abstract: A batteryless, chipless, sensor is disclosed which includes a substrate, at least two conductive strips disposed on the substrate, a passivation layer encasing the substrate and the at least two conductive strips, wherein the conductive strips are adapted to respond to an interrogation signal from a reader having a first polarization, with a response signal at a second polarization different than the first polarization.

公开(公告)号：US20240335148A1

公开(公告)日：2024-10-10

申请号：US18631886

申请日：2024-04-10

Applicant: Purdue Research Foundation

Inventor： Rahim Rahimi ,  Sarath Gopalakrishnan ,  Muhammad Masud Rana

IPC: A61B5/20 ,  G01F23/26 ,  G01N27/07 ,  G01N33/493 ,  H01Q1/38

CPC classification number: A61B5/20 ,  G01F23/26 ,  G01N27/07 ,  G01N33/493 ,  H01Q1/38

Abstract: A system for non-invasive urinary activity monitoring may include a sticker that attaches to a urine bag. The sticker may include a metal layer shaped as an antenna. A device may cause a network analyzer to send a signal in a direction of the urine bag. The device may detect a shift in a resonant frequency of the antenna. The device may measure, based on the change in resonant frequency, an amount of fluid in the container. The device may measure, based on a change in the resonant peak amplitude, the conductivity of the fluid in the container.