Petroleum viscosity measurement and communication system and method

• US 8,191,403 B2
• Filed: 03/27/2008
• Issued: 06/05/2012
• Est. Priority Date: 03/27/2007
• Status: Expired due to Fees

• Current Assignee: Richmond Chemical Corporation
• Original Assignee: Richmond Chemical Corporation
• Inventors: Quist, Arjan, Lal, Ratnesh, Liesen, Gregory P., Srivastava, Sunil K.
• Primary Examiner(s): FITZGERALD, JOHN P
• Application Number:
  US12/057,016
• Publication Number:
  US 20080289400A1
• Time in Patent Office: 1,531 Days
• Field of Search: 73/10.2, 73/530.5, 73/544.1, 73/645.3, 850/57
• US Class Current: 73/53.05
• CPC Class Codes: G01N 11/16 by measuring damping effect upon oscillatory body
• CPC Class Codes: G01N 33/2888 Lubricating oil characteristics, e.g. deterioration lubricating properties G01N33/30

Abstract

The disclosure presents an apparatus and method for measuring viscosity of a lubricating oil. The apparatus has a piezo-resistive cantilever sensor for sensing a first oil viscosity parameter. The sensor has a cantilever having a pressure receiving portion for receiving pressure exerted by the lubricating oil as the lubricating oil comes into contact with the pressure receiving portion. The cantilever also has first and second resistive portions in electrical communication with a first lead and a second lead, respectively, which are in electrical communication with an electrical circuit amplification element, for creating an output signal indicative of a change in the resistive characteristics of the first and second resistive portions of the cantilever as the lubricating oil comes into contact with the pressure receiving portion. The output signal can be used for determining oil viscosity. A processor and memory compare the output signal value with a stored resistance value to provide information relating to the quality of the lubricating oil.

Claims

1. An apparatus for measuring the viscosity of a lubricating oil comprising:

a piezo-resistive cantilever sensor for sensing a first oil viscosity parameter, the sensor comprising;

a cantilever having a pressure receiving portion for receiving pressure exerted by the lubricating oil as the lubricating oil comes into contact with the pressure receiving portion, the cantilever further having a first resistive portion in electrical communication with the pressure receiving portion and having a second resistive portion in electrical communication with the pressure receiving portion;

a first lead in electrical communication with the first resistive portion; and

,

a second lead in electrical communication with the second resistive portion;

an electrical circuit amplification element in electrical communication with at least one of the first lead and the second lead for creating an output signal indicative of a change in the resistive characteristics of the first and second resistive portions as the lubricating oil comes into contact with the pressure receiving portion for sensing the first oil viscosity parameter;

a processor in communication with the electrical circuit amplification element and having a memory associated therewith for receiving and storing the output signal and for determining quality of the lubricating oil by comparing the output signal with a stored resistance value; and

,

a user interface device in communication with the processor for receiving and communicating a lubricating oil quality signal through the interface device in response to the processor determining quality of the lubricating oil.

2. The apparatus of claim 1 wherein the electrical circuit amplification element is a Wheatstone bridge.

3. The apparatus of claim 1 wherein the electrical circuit amplification element is connected to a power supply for driving current through the first resistive portion and the second resistive portion.

4. The apparatus of claim 1 further comprising:

an RF transmitter in electrical communication with the electrical circuit amplification element for receiving the output signal and for communicating the output signal to the processor; and

,

an RF receiver in electrical communication with the processor for receiving the output signal from the RF transmitter and for communicating the output signal to the processor.

5. The apparatus of claim 1 further comprising:

a network interface for interfacing with a communication network for receiving the lubricating oil quality signal and for transmitting the lubricating oil quality signal to the communication network, wherein the user interface device receives the lubricating oil quality signal from the communication network and communicates the lubricating oil quality signal through the interface device.

6. The apparatus of claim 1, wherein the lubricating oil quality signal comprises content of at least one of change oil now information, time until oil change is needed information;

distance until oil change is needed information, viscosity information, service station information, and/or coupon information.

7. The apparatus of claim 6 further comprising:

an intermediary server for receiving a plurality of lubricating oil quality signals, determining whether to send service station information and/or coupon information to respective user interface devices associated with each user interface device based on the content of each of the lubricating oil quality signals, and transmitting service station information and/or coupon information to respective user interface devices when the determination indicates that the content comprises change oil now information, the content comprises a time until oil change is needed information which is less than a predetermined time; and

/or the content comprises distance until oil change is needed information which is less than a predetermined distance.

8. The apparatus of claim 1 wherein the cantilever and the electrical circuit amplification element are integrally fabricated within a cantilever chip.

9. The apparatus of claim 8 wherein the piezo-resistive cantilever sensor is mounted to a motor oil dip stick for insertion into an automobile engine.

10. The apparatus of claim 1 wherein the first lead is connection to a first contacting deposited on a ceramic plate, and wherein the second lead is connected to a second contacting deposited on the ceramic plate.

11. The apparatus of claim 10 wherein the first lead electrical circuit element is connected to the first and second leads through first and second pads.

12. The apparatus of claim 10 wherein the first and second pads are at least partially gold, and wherein the first and second leads are at least partially aluminum.

13. A method of measuring the viscosity of a lubricating oil comprising:

sensing a first oil viscosity parameter at a piezo-resistive cantilever sensor, comprising the steps of;

receiving pressure exerted by the lubricating oil on the cantilever having a pressure receiving portion, as the lubricating oil comes into contact with the pressure receiving portion, the cantilever further having a first resistive portion in electrical communication with the pressure receiving portion and having a second resistive portion in electrical communication with the pressure receiving portion; and

,

creating an output signal indicative of a change in the resistive characteristics of the first and second resistive portions and the lubricating oil comes into contact with the pressure receiving portion for sensing the first oil viscosity parameter;

amplifying the output signal at an electrical circuit amplification element;

receiving and storing the output signal at a processor in communication with the electrical circuit amplification element;

determining quality of the lubricating oil by comparing the output signal with a stored resistance value; and

,

receiving and communicating a lubricating oil quality signal at an interface device in response to the processor determining quality of the lubricating oil.

14. The method of claim 13 further comprising the step of driving current through the first resistive portion and the second resistive portion.

15. The method of claim 13 further comprising the steps of:

receiving an output signal at an RF transmitter in electrical communication with the electrical circuit element;

transmitting the output signal to the processor at the RF transmitter;

receiving the output signal from the RF transmitter at an RF receiver in electrical communication with the processor; and

,

communicating the output signal to the processor from the RF receiver.

16. The method of claim 13 further comprising the steps of:

receiving the lubricating oil quality signal at a network interface for interfacing with a communication network;

transmitting the lubricating oil quality signal to the communications network;

receiving the lubricating oil quality signal from the communication network at the user interface device; and

,

communicating the lubricating oil quality signal through the interface device.

17. The method of claim 13 wherein the lubricating oil quality signal comprises content of at least one of change oil now information, time until oil change is needed information;

distance until oil change is needed information, viscosity information, service station information, and/or coupon information.

18. The method of claim 17 further comprising the steps of:

receiving a plurality of lubricating oil quality signals at an intermediary server;

determining whether to send service station information and/or coupon information to respective user interface devices, associated with each user interface device based on the content of each of the lubricating oil quality signals; and

,

transmitting service station information and/or coupon information to respective user interface devices when the determination indicates that the content comprises change oil now information, the content comprises a time until oil change is needed information which is less than a predetermined time, and/or the content comprises distance until oil change is needed information which is less than a predetermined distance.

19. An apparatus for measuring a property of a lubricating oil comprising:

a piezo-resistive cantilever sensor for sensing a first parameter, the sensor comprising;

a cantilever having a pressure receiving portion for receiving pressure caused by a reaction of the cantilever to the property of the lubricating oil, the cantilever further having a first resistive portion in electrical communication with the pressure receiving portion and having a second resistive portion in electrical communication with the pressure receiving portion;

a first lead in electrical communication with the first resistive portion; and

,

a second lead in electrical communication with the second resistive portion;

an electrical circuit amplification element in electrical communication with at least one of the first lead and the second lead for creating an output signal indicative of a change in the resistive characteristics of the first and second resistive portions as the pressure receiving portion receives pressure by a reaction of the cantilever to the property of the lubricating oil, for sensing the first parameter;

a processor in communication with the electrical circuit amplification element and having a memory associated therewith for receiving and storing the output signal and for determining quality of the lubricating oil by comparing the output signal with a stored resistance value; and

,

a user interface device for in communication with the processor for receiving and communicating a lubricating oil quality signal through the interface device in response to the processor determining quality of the lubricating oil.

20. The apparatus of claim 19, wherein the property is the amount of magnetic articles in the lubricating oil, and the cantilever reacts by deflecting in response to pressure exerted by the magnetic particles being attracted to a magnetic field.

21. The apparatus of claim 19, wherein the property is the amount of a chemical in the lubricating oil, and the cantilever reacts by deflecting in response to pressure exerted by absorption of the chemical by a chemical-absorbing coating on the cantilever.

22. The apparatus of claim 19, wherein the property is the amount of a chemical in the lubricating oil, and the cantilever reacts by deflecting in response to pressure exerted by a change in the surface free energy caused by a chemical reaction between the chemical and a coating on the cantilever.

23. The apparatus of claim 19, wherein the property is the pH of the lubricating oil, and the cantilever reacts by deflecting in response to pressure exerted by a change in surface free energy caused by a protonation-deprotonation reaction of a coating on the cantilever.