Biosignal measurement apparatus

Patent metadata

Field	Value
Publication number	US-11883200-B2
Application number	US-202217588028-A
Country	US
Kind code	B2
Filing date	Jan 28, 2022
Priority date	Jan 12, 2016
Publication date	Jan 30, 2024
Grant date	Jan 30, 2024

Abstract

A biosignal measurement apparatus is used by being affixed on a living body. The apparatus includes an affixed part that is a sheet, in which a signal-acquiring section of multiple electrodes and wiring connected to each of the electrodes are formed, and which can be freely expanded, contracted and bent and is adhesive; and a substrate that is connected to the wiring and on which a signal-processing circuit for wirelessly transmitting biosignals obtained through the wiring is mounted. The signal-acquiring section is exposed on the surface of the affixed part and the affixed part and the substrate are stacked so that the back surface of the affixed part faces the substrate.

First claim

What is claimed is:

1. A biosignal measurement apparatus used by being affixed on a living body, the biosignal measurement apparatus comprising:
a sheet formed with a plurality of electrodes and a plurality of wirings connected to the plurality of electrodes respectively, the sheet being freely expanded, contracted and bent and being adhesive, wherein the sheet has a flexible connecting part;
a connector attached to a tip of the flexible connecting part and connected to the plurality of wirings disposed on the sheet; and
a substrate connected to the connector and equipped with a signal processing circuit wirelessly transmitting a biosignal acquired via the plurality of wirings disposed on the connector,
wherein the sheet is physically separated from the substrate, and the sheet is only connected to the substrate via the connector,
wherein the plurality of electrodes are exposed on a front surface of the sheet, and the sheet and the substrate are stacked so that a back surface of the sheet faces the substrate.

2. The biosignal measurement apparatus according to claim 1 , wherein
each of the sheet and the substrate under a state of the front surface of the sheet affixed on the living body has an outer shape in plan view of a size falling within a rectangle of 5 cm×15 cm.

3. The biosignal measurement apparatus according to claim 1 , wherein
the plurality of electrodes include a reference electrode and a plurality of measurement electrodes.

4. The biosignal measurement apparatus according to claim 3 , wherein
the reference electrode is attachable to and detachable from the sheet, and is affixed on the sheet.

5. The biosignal measurement apparatus according to claim 1 , wherein
the plurality of electrodes include electrodes arranged parallelly in at least two rows, and each of the rows includes a plurality of electrodes in line.

6. The biosignal measurement apparatus according to claim 1 , wherein
the plurality of wirings extend respectively and correspondingly from the electrodes to the connecting part, and
the connecting part is bent so that the sheet is folded back, and a tip of the connecting part is connected to the signal processing circuit.

7. The biosignal measurement apparatus according to claim 6 , wherein
the connecting part of the sheet increases in hardness from a portion close to the plurality of electrodes toward a portion close to the tip.

8. The biosignal measurement apparatus according to claim 1 , wherein
the signal processing circuit includes an analog circuit for processing an analog signal acquired via the plurality of electrodes to convert the analog signal into a digital signal, a digital circuit for processing the digital signal acquired by the analog circuit to transmit the digital signal wirelessly, and a power source circuit for supplying power to the analog circuit and the digital circuit, and
the analog circuit, the digital circuit and the power source circuit are respectively mounted in a first region, a second region and a third region obtained by dividing a mounting surface of the substrate into three regions.

9. The biosignal measurement apparatus according to claim 8 , wherein
the analog circuit has an A/D converting section for converting the analog signal into a digital signal having a bit number of 20 bits or more.

10. The biosignal measurement apparatus according to claim 8 , wherein
the analog circuit has a contact state-detecting circuit for detecting a contact state between the plurality of electrodes and the living body by measuring a contact impedance between the plurality of electrodes and the living body.

11. The biosignal measurement apparatus according to claim 8 , wherein the power source circuit includes:
a rechargeable battery;
a connection terminal provided on the substrate; and
a charging circuit for charging the battery with power supplied through the connection terminal.

12. The biosignal measurement apparatus according to claim 1 , further comprising a cushion between the sheet and the substrate.

Assignees

• Univ Osaka

Inventors

• Sekitani Tsuyoshi
• Uemura Takafumi
• Araki Teppei
• Yoshimoto Shusuke

Classifications

• A61B5/6833 Primary

  Adhesive patches · CPC title

• A61B5/0002

  Remote monitoring of patients using telemetry, e.g. transmission of vital signals via a communication network (endoradiosondes A61B5/07) · CPC title

• A61B5/25

  Bioelectric electrodes therefor · CPC title

• A61B5/291

  for electroencephalography [EEG] · CPC title

• A61B5/296

  for electromyography [EMG] · CPC title