Sensing system for detecting machine fluid degradation

Patent metadata

Field	Value
Publication number	US-10598651-B2
Application number	US-201615379920-A
Country	US
Kind code	B2
Filing date	Dec 15, 2016
Priority date	Dec 15, 2016
Publication date	Mar 24, 2020
Grant date	Mar 24, 2020

Abstract

A sensing system for sensing degradation of a machine fluid is disclosed. The sensing system may comprise a capsule including a dissolvable element. The dissolvable element may be configured to at least partially dissolve when placed in contact with the machine fluid having an acid content indicative of degradation of the machine fluid. The sensing system may further comprise a tracer encapsulated by the capsule. The tracer may be at least partially released from the capsule when the dissolvable element at least partially dissolves.

First claim

What is claimed is:

1. A sensing system, comprising:
a container configured to hold a machine fluid selected from engine oil, transmission fluid, hydraulic fluid, and coolant fluid, the machine fluid degrading when an acid content of the machine fluid reaches a level characteristic of degradation of the machine fluid;
a filter in fluid communication with the container;
a capsule including a dissolvable element, the dissolvable element being configured to at least partially dissolve when placed in contact with the machine fluid and when the acid content of the machine fluid reaches the level characteristic of the degradation of the machine fluid;
a tracer encapsulated by the capsule, the tracer being at least partially released from the capsule when the dissolvable element at least partially dissolves in the machine fluid, the at least partial release of the tracer from the capsule providing a signal for the degradation of the machine fluid; and
a detector within the container and proximate the filter, the detector detecting the signal for the degradation of the machine fluid.

2. The sensing system of claim 1 , wherein the tracer produces at least one characteristic signal when released into the machine fluid.

3. The sensing system of claim 1 , wherein the tracer includes a dye.

4. The sensing system of claim 1 , wherein the tracer includes a fluorescent element or chromophore.

5. The sensing system of claim 1 , wherein the tracer includes a compound or element having infrared (IR)-active vibrational modes.

6. The sensing system of claim 1 , wherein the tracer includes a metal, a metal salt, or a metal complex.

7. The sensing system of claim 1 , wherein the dissolvable element is formed from a compound selected from the group consisting of magnesium oxide, zinc oxide, cadmium oxide, and combinations thereof.

8. The sensing system of claim 1 , further comprising a reader in wireless or electronic communication with the detector, the reader having a display displaying the signal.

9. A sensing system for sensing degradation of a machine fluid of a machine, comprising:
a fluid circuit onboard the machine and having the machine fluid flowing circulating therethrough, the machine fluid being selected from engine oil, transmission fluid, coolant fluid, and hydraulic fluid;
a filter within the fluid circuit;
a capsule disposed within the fluid circuit and including a dissolvable element, the dissolvable element being configured to at least partially dissolve when placed in contact with the machine fluid and when an acid content of the machine fluid reaches a level characteristic of the degradation of the machine fluid; and
a tracer encapsulated by the capsule, the tracer being at least partially released from the capsule when the dissolvable element at least partially dissolves, the at least partial release of the tracer from the capsule providing a signal for the degradation of the machine fluid; and
a detector configured to detect the release of tracer in a location proximate the filter.

10. The sensing system of claim 9 , further comprising a detector onboard the machine and within the fluid circuit, the detector detecting the signal for the degradation of the machine fluid.

11. The sensing system of claim 9 , further comprising a hand-held device separate from the machine and including a probe for insertion into the machine fluid within the fluid circuit proximate the filter.

12. A sensing system for sensing degradation of a machine fluid of a machine, comprising:
a container containing the machine fluid, the machine fluid being selected from transmission fluid, hydraulic fluid, and coolant fluid, the machine fluid degrading when an acid content of the machine fluid reaches a level characteristic of degradation of the machine fluid;
a filter in fluid connection with the container;
a capsule including a dissolvable element, the dissolvable element being formed from a compound selected from the group consisting of magnesium oxide, zinc oxide, cadmium oxide, and combinations thereof, the dissolvable element being configured to at least partially dissolve when placed in contact with the machine fluid and when the acid content of the machine fluid reaches the level characteristic of the degradation of the machine fluid; and
a tracer encapsulated by the capsule, the tracer being at least partially released from the capsule when the dissolvable element at least partially dissolves in the machine fluid, the at least partial release of the tracer from the capsule providing a signal for the degradation of the machine fluid; and
a detector configured to detect the release of tracer in a location proximate the filter.

13. The sensing system of claim 12 , wherein the tracer produces at least one characteristic signal when released into the machine fluid.

14. The sensing system of claim 12 , wherein the tracer includes a dye.

15. The sensing system of claim 12 , wherein the tracer includes a fluorescent element or chromophore.

16. The sensing system of claim 12 , wherein the tracer includes a compound or element having infrared (IR)-active vibrational modes.

17. The sensing system of claim 12 , wherein the tracer includes a metal, a metal salt, or a metal complex.

18. The sensing system of claim 12 , wherein the dissolvable element is formed from a compound selected from the group consisting of magnesium oxide, zinc oxide, cadmium oxide, and combinations thereof.

19. The sensing system of claim 12 , further comprising a detector onboard the machine and within the fluid circuit, the detector detecting the signal for the degradation of the machine fluid.

20. The sensing system of claim 12 , further comprising a hand-held device separate from the machine and including a probe for insertion into the machine fluid within the fluid circuit proximate the filter.

Assignees

• Caterpillar Inc

Inventors

• Spengler Philip C
• Abi-Akar Hind
• Ries Jeffrey R

Classifications

• G01N33/2888 Primary

  Lubricating oil characteristics, e.g. deterioration (lubricating properties G01N33/30) · CPC title

• G01N21/6428

  Measuring fluorescence of fluorescent products of reactions or of fluorochrome labelled reactive substances, e.g. measuring quenching effects, using measuring "optrodes" (in vivo A61B5/00; immunoassay G01N33/53) · CPC title

• G01N31/22

  using chemical indicators (G01N31/02 takes precedence) · CPC title

• G01N21/3577

  for analysing liquids, e.g. polluted water · CPC title

• G01N11/00

  Investigating flow properties of materials, e.g. viscosity, plasticity; Analysing materials by determining flow properties · CPC title