Strain gauge
US-11702730-B2 · Jul 18, 2023 · US
Strain gauge
US2023400370A1 · US · A1
| Field | Value |
|---|---|
| Publication number | US-2023400370-A1 |
| Application number | US-202218261351-A |
| Country | US |
| Kind code | A1 |
| Filing date | Jan 13, 2022 |
| Priority date | Jan 18, 2021 |
| Publication date | Dec 14, 2023 |
| Grant date | — |
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- Title
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Abstract
Official abstract text for this publication.
According to the present disclosure, a strain gauge includes: a flexible substrate; a resistor made from a film containing Cr, CrN, and Cr 2 N, on one surface of the substrate; and a resin barrier layer covering the resistor, and, in this strain gauge, in the barrier layer, a ratio of a moisture permeability (g/m 2 /24 h) to a thickness (mm) is 5:1 or greater, and the thickness of the barrier layer is 100 μm or more and 3 mm or less.
First claim
Opening claim text (preview).
1 . A strain gauge comprising: a flexible substrate; a resistor made from a film containing Cr, CrN, and Cr 2 N, on one surface of the substrate; and a resin barrier layer covering the resistor, wherein, in the barrier layer, a ratio of moisture permeability (g/m 2 /24 h) to thickness (mm) is 5:1 or greater, and the thickness of the barrier layer is 100 μm or more and 3 mm or less. 2 . The strain gauge according to claim 1 , wherein the barrier layer is made from a fluoropolymer, an epoxy resin, or an acrylic resin. 3 . The strain gauge according to claim 1 , wherein the barrier layer covers an upper surface and side surfaces of the resistor in a continuous manner. 4 . The strain gauge according to claim 1 , wherein an insulating stress relaxing layer is placed between the resistor and the barrier layer. 5 . The strain gauge according to claim 4 , wherein the stress relaxing layer is an organic film having a lower Young's modulus than the barrier layer. 6 . The strain gauge according to claim 1 , wherein a gauge factor is 10 or more. 7 . The strain gauge according to claim 1 , wherein the CrN and the Cr 2 N contained in the resistor are 20% by weight or less. 8 . The strain gauge according to claim 7 , wherein a proportion of the Cr 2 N in the CrN and the Cr 2 N is 80% or more by weight and less than 90% by weight.
Assignees
Inventors
Classifications
- G01L1/2287Primary
constructional details of the strain gauges (adjustable resistors H01C10/00) · CPC title
- G01B7/20Primary
formed by printed-circuit technique · CPC title
Measuring instruments characterised by the selection of material therefor · CPC title
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- What does patent US2023400370A1 cover?
- According to the present disclosure, a strain gauge includes: a flexible substrate; a resistor made from a film containing Cr, CrN, and Cr 2 N, on one surface of the substrate; and a resin barrier layer covering the resistor, and, in this strain gauge, in the barrier layer, a ratio of a moisture permeability (g/m 2 /24 h) to a thickness (mm) is 5:1 or greater, and the thickness of the barrier l…
- Who is the assignee on this patent?
- Minebea Mitsumi Inc
- What technology area does this patent fall under?
- Primary CPC classification G01L1/2287. Mapped technology areas include Physics.
- When was this patent published?
- Publication date Thu Dec 14 2023 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 12 related publications on this page (citations in our corpus or others sharing the same primary CPC).