Sensor

Patent metadata

Field	Value
Publication number	US-12072249-B2
Application number	US-202217705164-A
Country	US
Kind code	B2
Filing date	Mar 25, 2022
Priority date	Mar 26, 2021
Publication date	Aug 27, 2024
Grant date	Aug 27, 2024

Abstract

Provided is a sensor that is able to efficiently identify a variety of motions made by a user. The sensor includes: a structure body configured to be deformable by an external force; an electrode configured to be disposed at an arbitrary position of the structure body; a determination unit configured to determine a contact state of an object with the structure body based on a change in impedance measured using the electrode; and an output unit configured to output a signal based on the contact state of the object with the structure body to an external device.

First claim

What is claimed is:

1. A sensor comprising:
a structure body configured to be deformable by an external force;
an electrode configured to be able to be attached to an arbitrary position of the structure body;
a determination unit configured to determine one deformation state of the structure body from multiple deformation states of the structure body based on a change in impedance measured using the electrode, for the structure body arbitrarily deformed by an object;
an output unit configured to output a signal based on the one deformation state of the structure body where the electrode is not disposed to an external device; and
an insulating shield member provided on a contact surface of the structure body with the object,
wherein the shield member has a set of openings at which the object comes in contact with the structure body, wherein the determination unit is configured to distinguish the multiple deformation states based on contacts with the set of openings.

2. The sensor according to claim 1 , wherein the determination unit is configured to determine the one deformation state based on a peak frequency and/or a height of a peak of a waveform indicative of the change in impedance measured.

3. The sensor according to claim 1 , wherein the determination unit is configured to detect at least one of a distance between a contact position of the object with the structure body and the electrode, an area of a contact surface of the structure body with the object, pressing on the contact surface by the object, and a material of the object based on the change in impedance.

4. The sensor according to claim 1 , wherein the output unit is an operation command output unit configured to output an operation command to the external device based on the one deformation state.

5. The sensor according to claim 1 , wherein:
the object is a part of a human body; and
the determination unit is configured to perform identity verification based on the change in impedance.

6. The sensor according to claim 1 , wherein:
the one deformation state occurs by a specific motion of a user; and
the determination unit is configured to detect the specific motion based on the change in impedance.

7. The sensor according to claim 1 , wherein the determination unit is configured to determine the one deformation state from the change in impedance by a learned model having learned a correlation between the change in impedance and the one deformation state.

8. The sensor according to claim 1 , wherein:
a first portion of the structure body is assigned as a first button and a second portion of the structure body is assigned as a second button;
the change in impedance corresponds to deformation of the structure body; and
determining the one deformation state includes determining whether the object contacted the first button or the second button based on the change in impedance.

Assignees

• Mercari Inc
• Univ Tokyo

Inventors

• Yamamura Ryosuke
• Kakehi Yasuaki
• Watanabe Keisuke

Classifications

• G06F3/041

  Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means · CPC title

• G06F1/3231

  Monitoring the presence, absence or movement of users · CPC title

• G06F2203/04105

  Pressure sensors for measuring the pressure or force exerted on the touch surface without providing the touch position · CPC title

• G01L5/0038

  applying a pushing force · CPC title

• G06F3/017

  Gesture based interaction, e.g. based on a set of recognized hand gestures (interaction based on gestures traced on a digitiser G06F3/04883) · CPC title