Sensor

Patent metadata

Field	Value
Publication number	US-11067462-B2
Application number	US-201816042349-A
Country	US
Kind code	B2
Filing date	Jul 23, 2018
Priority date	Aug 22, 2017
Publication date	Jul 20, 2021
Grant date	Jul 20, 2021

Abstract

A sensor includes: a pressure vessel filled with an enclosed liquid; a diaphragm that seals the pressure vessel; a sensor body contained in the pressure vessel; an electric wire comprising a wiring electrically connected to the sensor body; a fixture that fixes the electric wire to the pressure vessel; a first fillet at a joining portion between the electric wire and the fixture, wherein the first fillet contacts the enclosed liquid; and a second fillet at a joining portion between the fixture and the pressure vessel, wherein the second fillet contacts the enclosed liquid.

First claim

What is claimed is:

1. A sensor comprising:
a pressure vessel filled with an enclosed liquid;
a diaphragm that seals the pressure vessel;
a sensor body contained in the pressure vessel;
an electric wire comprising a wiring electrically connected to the sensor body;
a fixture that fixes the electric wire to the pressure vessel;
a first fillet at a joining portion between the electric wire and the fixture, wherein the first fillet contacts the enclosed liquid;
a second fillet at a joining portion between the fixture and the pressure vessel, wherein the second fillet contacts the enclosed liquid; and
a third fillet at a joining portion between the electric wire and the fixture, wherein the third fillet does not contact the enclosed liquid.

2. The sensor according to claim 1 , further comprising a groove in a bottom wall of the pressure vessel, wherein the groove is concaved downward and has a curved surface.

3. The sensor according to claim 1 , wherein the electric wire further comprises:
a base formed by sintering a plurality of ceramic plates; and
a wiring embedded in the base.

4. The sensor according to claim 1 ,
wherein the pressure vessel comprises a cylindrical vessel body and a columnar lid, and
wherein the cylindrical vessel body and the columnar lid have a common center axis.

5. The sensor according to claim 4 , wherein material of the cylindrical vessel body and material of the columnar lid are nickel-based superalloy.

6. The sensor according to claim 4 ,
wherein the cylindrical vessel body comprises a bottom wall that covers a lower end of the cylindrical vessel body, and
wherein the bottom wall has a through hole that vertically passes through the bottom wall.

7. The sensor according to claim 6 , further comprising a groove disposed on an upper surface of the bottom wall, wherein the groove is concaved downward and has a curved surface at a boundary between an inner peripheral surface of the cylindrical vessel body and the upper surface of the bottom wall.

8. The sensor according to claim 6 , wherein the electric wire is a columnar member that extends in a vertical direction and is inserted into the through hole of the cylindrical vessel body.

9. The sensor according to claim 4 , wherein the columnar lid comprises:
a columnar pressure receiver;
a flange that extends outward in a radial direction of the columnar lid from a lower end of the columnar pressure receiver; and
a cylindrical fitting portion that extends downward from an inner peripheral edge of the flange.

10. The sensor according to claim 1 , wherein the electric wire comprises:
a base having non-conductivity; and
a wiring having conductivity,
wherein the wiring is exposed at an upper end and a lower end of the base,
wherein the wiring is electrically connected to a lead wire at the upper end of the base, and
wherein the lead wire is electrically connected to the sensor body.

11. The sensor according to claim 1 , further comprising a ring-shaped spacer fitted over the fixture.

12. The sensor according to claim 11 , wherein the ring-shaped spacer is between the fixture and a cylindrical vessel body.

13. The sensor according to claim 1 ,
wherein a periphery of the electric wire is metallized.

14. A sensor comprising:
a pressure vessel filled with an enclosed liquid;
a diaphragm that seals the pressure vessel;
a sensor body contained in the pressure vessel;
an electric wire comprising a wiring electrically connected to the sensor body;
a fixture that fixes the electric wire to the pressure vessel;
a first fillet at a joining portion between the electric wire and the fixture, wherein the first fillet contacts the enclosed liquid; and
a second fillet at a joining portion between the fixture and the pressure vessel, wherein the second fillet contacts the enclosed liquid,
wherein the pressure vessel comprises a cylindrical vessel body and a columnar lid,
wherein the cylindrical vessel body and the columnar lid have a common center axis,
wherein the sensor further comprises a sensor body container in a lower surface of the columnar lid, and
wherein the sensor body container is concaved upward and contains the sensor body.

15. A sensor comprising:
a pressure vessel filled with an enclosed liquid;
a diaphragm that seals the pressure vessel;
a sensor body contained in the pressure vessel;
an electric wire comprising a wiring electrically connected to the sensor body;
a fixture that fixes the electric wire to the pressure vessel;
a first fillet at a joining portion between the electric wire and the fixture, wherein the first fillet contacts the enclosed liquid; and
a second fillet at a joining portion between the fixture and the pressure vessel, wherein the second fillet contacts the enclosed liquid,
wherein the pressure vessel comprises a cylindrical vessel body and a columnar lid,
wherein the cylindrical vessel body and the columnar lid have a common center axis,
wherein the columnar lid comprises:
a columnar pressure receiver;
a flange that extends outward in a radial direction of the columnar lid from a lower end of the columnar pressure receiver; and
a cylindrical fitting portion that extends downward from an inner peripheral edge of the flange, and

wherein the sensor further comprises:
a concave portion on an upper surface of the columnar pressure receiver, wherein the concave portion is concaved downward and covered by the diaphragm; and
a pressure receiving chamber between the diaphragm and the concave portion.

16. The sensor according to claim 15 ,
wherein the columnar pressure receiver has a communicating hole passing through the columnar pressure receiver in a vertical direction, and
wherein the pressure receiving chamber communicates with a measurement chamber via the communicating hole, wherein the measurement chamber is a space in a sensor body container.

17. The sensor according to claim 15 ,
wherein the flange has a lower surface in contact with an upper surface of the cylindrical vessel body, and
wherein the cylindrical fitting portion is fitted to a peripheral wall of the cylindrical vessel body.

Assignees

• Yokogawa Electric Corp

Inventors

• Hirayama Toru
• Yoshida Yusaku
• Yumoto Atsushi
• Miyauchi Tatsuhiko

Classifications

• G01L19/04

  Means for compensating for effects of changes of temperature {, i.e. other than electric compensation} · CPC title

• G01K5/02

  the material being a liquid (contained in a hollow body having parts which are deformable or displaceable under the pressure developed by the material G01K5/32) · CPC title

• G01L19/142

  Multiple part housings · CPC title

• G01L19/0672

  Leakage or rupture protection or detection · CPC title

• G01L19/0645

  using isolation membranes, specially adapted for protection · CPC title