Variable resistance conductive rubber sensor and method of detecting an object/human touch therewith
US-10060172-B2 · Aug 28, 2018 · US
Proximity sensor
US2018316348A1 · US · A1
| Field | Value |
|---|---|
| Publication number | US-2018316348-A1 |
| Application number | US-201815926086-A |
| Country | US |
| Kind code | A1 |
| Filing date | Mar 20, 2018 |
| Priority date | Apr 26, 2017 |
| Publication date | Nov 1, 2018 |
| Grant date | — |
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- Title
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Abstract
Official abstract text for this publication.
A proximity sensor includes a sensor cable that includes a first electrode wire and a second electrode wire arranged parallel to each other, an insulation covering both the first electrode wire and the second electrode wire, and a shield partially covering a surface of the insulation so as to form an opening, the first electrode wire and the second electrode wire being arranged to have different distances to the opening, and a detector circuit that includes a first capacitance detecting portion for detecting a first capacitance to be detected by the first electrode wire, a second capacitance detecting portion for detecting a second capacitance to be detected by the second electrode wire, and a differential output portion for outputting a difference between the first capacitance and the second capacitance.
First claim
Opening claim text (preview).
1 . A proximity sensor, comprising: a sensor cable that comprises a first electrode wire and a second electrode wire arranged parallel to each other, an insulation covering both the first electrode wire and the second electrode wire, and a shield partially covering a surface of the insulation so as to form an opening, the first electrode wire and the second electrode wire being arranged to have different distances to the opening; and a detector circuit that comprises a first capacitance detecting portion for detecting a first capacitance to be detected by the first electrode wire, a second capacitance detecting portion for detecting a second capacitance to be detected by the second electrode wire, and a differential output portion for outputting a difference between the first capacitance and the second capacitance. 2 . The proximity sensor according to claim 1 , wherein the insulation comprises a hollow portion formed between the first electrode wire and the second electrode wire. 3 . The proximity sensor according to claim 1 , wherein each of the first and the second electrode wire comprises a conductive wire comprising a metal and a conductive layer comprising a conductive rubber or a conductive plastic and covering the conductive wire. 4 . The proximity sensor according to claim 1 , wherein the shield comprises a composite tape formed by laminating a base comprising an insulating resin and a metal layer comprising a conductive metal. 5 . The proximity sensor according to claim 4 , wherein the composite tape is longitudinally wrapped along a longitudinal direction of the sensor cable. 6 . The proximity sensor according to claim 4 , wherein a plurality of slits are formed on the metal layer of the composite tape at predetermined intervals, and the composite tape is spirally wound around the sensor cable so that the plurality of slits are lined up along the longitudinal direction of the sensor cable and form an opening. 7 . The proximity sensor according to claim 2 , wherein each of the first and the second electrode wire comprises a conductive wire comprising a metal and a conductive layer comprising a conductive rubber or a conductive plastic and covering the conductive wire. 8 . The proximity sensor according to claim 2 , wherein the shield comprises a composite tape formed by laminating a base comprising an insulating resin and a metal layer comprising a conductive metal. 9 . The proximity sensor according to claim 3 , wherein the shield comprises a composite tape formed by laminating a base comprising an insulating resin and a metal layer comprising a conductive metal.
Assignees
Inventors
Classifications
by varying capacitance · CPC title
characterised by the detection principle · CPC title
- H03K17/955Primary
using a capacitive detector · CPC title
Capacitive differential; e.g. comparison with reference capacitance · CPC title
characterised by the type or shape of the sensing electrodes · CPC title
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Frequently asked questions
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- What does patent US2018316348A1 cover?
- A proximity sensor includes a sensor cable that includes a first electrode wire and a second electrode wire arranged parallel to each other, an insulation covering both the first electrode wire and the second electrode wire, and a shield partially covering a surface of the insulation so as to form an opening, the first electrode wire and the second electrode wire being arranged to have differen…
- Who is the assignee on this patent?
- Hitachi Metals Ltd
- What technology area does this patent fall under?
- Primary CPC classification H03K17/955. Mapped technology areas include Electricity.
- When was this patent published?
- Publication date Thu Nov 01 2018 00:00:00 GMT+0000 (Coordinated Universal Time) (A1). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 3 related publications on this page (citations in our corpus or others sharing the same primary CPC).