Wireless Gearbox Oil Temperature Sensing for Failure Prediction

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Solution Overview

Problem

Mechanical components, such as gearboxes, lack effective condition monitoring systems to detect impending failure, which can lead to unexpected breakdowns due to the absence of real-time temperature and vibration data, despite periodic maintenance.

Innovation Solution

A wireless gearbox temperature measurement device that uses a thermistor to monitor the temperature of gearbox oil and transmit data via wireless communication protocols like WiFi, Bluetooth, or Zigbee to a central device, allowing for real-time monitoring and alerting of potential failures through a control system.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If periodic maintenance is performed without real-time monitoring, then maintenance costs are reduced, but component failures cannot be prevented

Engineering Contradiction:

Improvecomponent reliabilityVSAvoidtemperature data

Core Design Contradiction:

ReliabilityVSLoss of information

Solution Approach 1:

The patent replaces mechanical/periodic maintenance systems with electronic sensor-based continuous monitoring. Temperature sensors continuously measure gearbox oil temperature and transmit data wirelessly, substituting the periodic physical inspection approach with automated electronic monitoring that provides real-time condition information without requiring manual intervention.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

Solution Approach 2:

The patent introduces wireless communication modules and central control systems as intermediaries between the gearbox and the maintenance system. The temperature sensors act as intermediaries that continuously gather temperature data and transmit it wirelessly to external monitoring systems, enabling remote condition assessment without direct physical access to the gearbox.

Inventive Principle:

Principle #24Intermediary (Mediator)

2Reliability

If temperature monitoring is implemented, then failure prediction is improved, but device complexity increases

Engineering Contradiction:

Improvefailure prediction capabilityVSAvoidmonitoring system complexity

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The patent employs universal wireless communication protocols and standardized sensor interfaces that can be applied across different gearbox models and applications. The temperature monitoring module uses common wireless technologies (WiFi, Bluetooth, Zigbee) that are widely available and easy to integrate, making the monitoring system adaptable to various equipment without requiring custom complex communication infrastructure.

Inventive Principle:

Principle #6Universality (Multi-functionality)

Solution Approach 2:

The patent uses inexpensive, off-the-shelf temperature sensors and wireless communication modules that can be easily replaced if needed. These components are commercially available at low cost and require minimal calibration or setup, reducing the overall complexity and investment required for implementing reliable temperature monitoring.

Inventive Principle:

Principle #27Cheap short-living objects (Disposable)

3Loss of information

If wireless transmission is used, then real-time data availability is improved, but energy consumption increases

Engineering Contradiction:

Improvereal-time data availabilityVSAvoidsensor energy consumption

Core Design Contradiction:

Loss of informationVSUse of energy by moving object

Solution Approach 1:

The patent implements periodic wireless data transmission where temperature readings are sent at predetermined time intervals rather than continuously. The sensor collects temperature data continuously but transmits it periodically to the central system, reducing the energy burden of constant wireless communication while still providing timely temperature information for failure prediction.

Inventive Principle:

Principle #19Periodic action

Solution Approach 2:

The patent establishes a feedback loop where the central control system receives temperature data and can send control signals back to adjust monitoring parameters or alert operators. This feedback mechanism enables intelligent data transmission where the system adapts its communication pattern based on actual temperature conditions and system needs, optimizing energy usage while maintaining effective monitoring.

Inventive Principle:

Principle #23Feedback

Applied Scientific Principles

This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.

Function Achieved in This Case

Enables proactive maintenance by providing critical temperature data for gearbox components, extending their life and preventing failures by alerting operators or control systems to potential issues, and can be easily retrofitted into existing gearboxes without significant modifications.

Implementation Method 1

The sensor includes a thermistor, electronics, and a wireless transceiver

Methodology Applied

Scientific EffectThermal energy: Thermistor

Data Source

PatentUS11796397B2Gearbox temperature measurement device

Publication Date: 2023.10.24 FAIRFIELD MFG CO INC

AI summary

Systems and methods for a temperature measurement device. A transmission includes a rotatable housing. The temperature measurement positioned on a transmission housing. The interior volume of the rotatable housing is partially filled with lubricant of transmission components residing within the interior volume of the housing. The temperature measurement device in contact with the lubricant and in communication with a device exterior to the transmission.