Bluetooth RFID Temperature Sensing for Early Work Machine Fault Detection
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Solution Overview
Problem
Existing agricultural work machines face challenges in identifying fault conditions of components due to the high cost and impracticality of using wired or battery-powered temperature sensors, which often fail to provide early warnings, leading to unexpected equipment failures.
Innovation Solution
Implementing radio frequency identification (RFID) tags with temperature sensing capabilities at critical locations within the machine, which are powered by ambient or directed RF energy, transmitting data wirelessly to a controller for real-time fault detection and alerting systems.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If wired or battery-powered temperature sensors are used to monitor component temperature, then temperature detection capability is improved, but system complexity and maintenance cost increase
Solution Approach 1:
The patent extracts the temperature sensing function from complex wired or battery-powered sensor systems and integrates it into a passive RFID tag. This allows temperature monitoring capability to be obtained without the complexity of power supply systems, wiring, or maintenance-intensive components.
Solution Approach 2:
The patent replaces the mechanical/electrical wired sensor system with a wireless RFID-based system. The passive RFID tag eliminates the need for physical wiring connections and battery power sources, substituting a simpler electromagnetic field-based communication system that reduces overall system complexity.
2Loss of information
If battery-powered sensors are deployed on moving parts, then real-time monitoring is improved, but maintenance requirements and operational reliability worsen
Solution Approach 1:
The passive RFID tag is powered by the RF energy it receives during interrogation, eliminating the need for external battery replacement or charging. The tag serves itself by harvesting energy from the reader's electromagnetic field, ensuring continuous operation without maintenance interruptions.
Solution Approach 2:
The patent employs inexpensive passive RFID tags that have no moving parts, no batteries to fail, and require no maintenance. These tags are designed to be durable, low-cost components that can be easily replaced if needed, but typically provide reliable service throughout the lifespan of the monitored component.
3Measurement precision
If multiple temperature sensors are installed at critical locations, then fault detection accuracy is improved, but system cost and installation complexity increase
Solution Approach 1:
The passive RFID tag serves multiple functions simultaneously: it provides identification, temperature sensing, and wireless communication capabilities. This multi-functionality allows a single component to replace what would traditionally require multiple separate devices (identification tag plus temperature sensor plus wiring plus power source), reducing overall system complexity while maintaining monitoring accuracy.
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 early detection of potential mechanical failures, reducing downtime and maintenance costs by providing real-time alerts and historical data analysis for predictive maintenance.
Implementation Method 1
powered by ambient or directed RF energy
Data Source
AI summary
An agricultural work machine, an agricultural work machine control system, and method for an agricultural work machine having Bluetooth enabled RFID tags to determine a fault condition of machine components, devices, parts or systems. The Bluetooth enabled RFID tags are located on, at, or near machine components or systems to sense a temperature of those components or systems. The Bluetooth enabled RFID tags are interrogated to determine sensed temperatures and component identifiers. A controller receives the temperatures and component identifiers and compares the received temperatures to a threshold to determine whether a fault condition exists. If so, the controller transmits an alert signal to a user interface to indicate that a fault condition exists with an identified component, part, device, or system.