Liquid debris sensor and system

Patent metadata

Field	Value
Publication number	US-11313779-B2
Application number	US-202016829318-A
Country	US
Kind code	B2
Filing date	Mar 25, 2020
Priority date	Mar 26, 2019
Publication date	Apr 26, 2022
Grant date	Apr 26, 2022

Abstract

A debris detection system includes a chamber configured to permit particles to pass through the chamber; an optical fiber or fiber optic cable providing a light path; a collimator configured to channel light from the light path into the chamber; and a reflector configured to reflect light back to the collimator for signal detection. In embodiments, the reflector may include a mirror. Methods for detecting particles and information and/or parameters associated with particles, including that associated with reflected light, are disclosed.

First claim

What is claimed is:

1. A debris detection system, comprising:
a chamber configured to permit fluid flow to pass through the chamber;
a fiber optic cable providing a light path;
a collimator, the collimator configured to channel light from the light path into the chamber;
a reflector, the reflector configured to reflect light channeled into the chamber from the light path back to the collimator for signal detection; and
an electronic control unit (ECU), the ECU configured to detect the existence of debris particles in the fluid flow path based on the detection of blockage of the light path between the collimator and the reflector, and wherein the detection is without regard to inherent material composition of the detected debris particles.

2. The system of claim 1 , wherein the reflector comprises a mirror.

3. The system of claim 1 , including an optical window disposed in the chamber and positioned between the collimator and the reflector.

4. The system of claim 3 , wherein the optical window is flat or substantially planar.

5. The system of claim 1 , wherein the fiber optic cable includes a structural member.

6. The system of claim 1 , wherein the fiber optic cable comprises a single optical fiber.

7. The system of claim 1 , wherein the fiber optic cable includes a plurality of optical fibers.

8. The system of claim 1 , wherein the fiber optic cable includes a first optical fiber and one or more second optical fibers.

9. The system of claim 1 , wherein the fiber optic cable includes a first optical fiber and a plurality of second optical fibers, the first optical fiber configured to function as a light emitter and the second optical fibers configured to function as light detectors.

10. The system of claim 9 , wherein the plurality of second optical fibers are arranged or clustered about the first optical fiber.

11. The system of claim 1 , wherein the fluid flow through the chamber includes a particle of debris, and the particle of debris blocks light from reaching the reflector.

12. The system of claim 1 , wherein the electronic control unit (ECU) is configured to access the fluid flow, based on detected debris particles in the fluid flow and identify the condition of the fluid flow through the system.

13. The system of claim 1 , including one or more sensors configured to detect/measure fluid flow.

14. The system of claim 13 , wherein the one or more sensors detect/measure fluid flow at positions prior to and/or subsequent to the chamber.

15. The system of claim 13 , wherein the one or more sensors are operatively connected to an electronic control unit (ECU).

16. The system of claim 1 , including a visual display connected physically or wirelessly to the ECU.

17. The system of claim 1 , wherein the ECU determines and/or evaluates information or parameters associated with one or more particles within the chamber.

18. The system of claim 17 , wherein the ECU determines and/or evaluates the presence of particles of a set or predetermined size.

19. A method for detecting information or parameters associated with particles in a fluid flow using a debris detection system including the steps of:
permitting fluid flow to pass through a chamber;
providing a light path;
using a collimator to channel light from the light path into the chamber;
reflecting the light channeled into the chamber from the light path back to the collimator for signal detection; and
using an electronic control unit (ECU) to detect debris particles in the fluid flow path that block the light path between the collimator and the reflector, wherein the ECU is configured to detect blocked light from the collimator that is associated the blockage of the light path caused by debris particles in the fluid flow path, and the detection is without regard to inherent material composition of the detected debris particles.

20. The method of claim 19 , further including the step of evaluating the reflected light within the chamber blocked by one or more particles.

Assignees

• Eaton Intelligent Power Ltd

Inventors

• Kopansky Gregory
• Birch George P
• Pu Xin
• Zielinski John

Classifications

• G01F1/661

  using light · CPC title

• G01V8/24

  using optical fibres · CPC title

• G01N15/0205 Primary

  by optical means · CPC title

• G01N15/1459

  the analysis being performed on a sample stream · CPC title

• G01N33/2858

  Metal particles · CPC title