Lubricant health detection system

A method for activating on a user interface an indicator of a condition that is a measure of quality of a lubricant in a module of a machine, the method comprising:

• receiving, for a first time window and a second time window, a plurality of lubricant characteristics and measured lubricant temperatures of the lubricant in the module,
• each of the plurality of lubricant characteristics being associated with a respective measured lubricant temperature of the measured lubricant temperatures;
• calculating an adjusted lubricant characteristic for each of the plurality of lubricant characteristics based on the lubricant characteristic and a relationship between a standard temperature and the respective measured lubricant temperature that is associated with the lubricant characteristic;
• determining, for one or more types of the plurality of lubricant characteristics received, a slope in each of the first time window and the second time window, the slope being based on a plurality of adjusted lubricant characteristics of the same type;
• determining a change in the slope from the first time window to the second time window of adjusted lubricant characteristics of the same type;
• generating, by a controller, a signal to activate the indicator on a user interface based on the change in slope;
• and
• displaying the indicator of the condition of the lubricant in the module on the user interface based on the signal generated by the controller,
• wherein if the change in slope for the plurality of adjusted lubricant characteristics exceeds a threshold, the indicator is a lubricant changed indicator.

A system for automatically detecting when a lubricant has been changed in a module of a machine and activating on a user interface an indicator of a condition of the lubricant in the module of the machine, the system comprising:

• a controller configured to:
• for each of a first time window and a second time window:
• receive a plurality of lubricant characteristics, measured lubricant temperatures, and current operating parameters of the module, each of the plurality of lubricant characteristics being associated with a respective measured lubricant temperature of the measured lubricant temperatures and a respective current operating parameter of the current operating parameters of the module,
• (b) for each lubricant characteristic, if the measured lubricant temperature associated with the lubricant characteristic is in a desired temperature range and the current operating parameter associated with the lubricant characteristic is in a desired parameter range, calculate an adjusted lubricant characteristic based on the lubricant characteristic and a relationship between a standard temperature and the measured lubricant temperature associated with the lubricant characteristic, and
• determine, for one or more types of the plurality of lubricant characteristics received, a slope in each of the first time window and the second time window, the slope being based on a plurality of adjusted lubricant characteristics of the same type;
• determine a change in the slope from the first time window to the second time window of adjusted lubricant characteristics of the same type;
• and
• generate a signal to activate the indicator on the user interface based on the change in slope;
• and
• a user interface configured to display the indicator of the condition of the lubricant in the module based on the signal generated by the controller,
• wherein if the lubricant characteristics received by the controller includes viscosities of the lubricant in the module, and if the change in slope from the first time window to the second time window for the plurality of adjusted lubricant characteristics for viscosity exceeds a viscosity threshold, the indicator is a lubricant changed indicator.