RFID Sensor Tag With Manual User Input For Temperature Monitoring
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Solution Overview
Problem
RFID systems used in the supply chain for monitoring temperature history profiles require an interrogator for data retrieval, limiting real-time monitoring and manual initialization capabilities, which can lead to delayed detection of spoiled goods and inefficiencies due to the limitations of existing visual time-temperature indicators.
Innovation Solution
An RFID tag with a controller, sensor, local power source, and user input device that allows manual initialization and selection of functions, enabling manual data retrieval and visual or tactile indication of alarm conditions, such as temperature changes, without the need for an interrogator.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Extent of automation
If RFID systems require an interrogator for data retrieval, then centralized monitoring capability is improved, but real-time manual monitoring capability deteriorates
Solution Approach 1:
The RFID tag is equipped with a user input device that enables it to autonomously initiate sensor readings and data retrieval operations without requiring an external interrogator. When a user presses the input device, the tag wakes from hibernate mode, activates the sensor, and retrieves stored temperature profile data, allowing the device to serve itself and the user directly.
Solution Approach 2:
The RFID tag integrates multiple functions including sensor data collection, data storage, automated interrogator communication, and manual user-initiated operations. This multi-functionality allows the same device to operate both as an automated monitored object and as a manually operable instrument, resolving the contradiction between centralized and manual monitoring capabilities.
2Use of energy by moving object
If RFID tags remain in hibernate state to conserve power, then energy consumption is reduced, but responsiveness to user input deteriorates
Solution Approach 1:
The activate circuitry is designed to be quickly唤醒 from the hibernate state upon receiving a signal from the user input device. The circuit is pre-configured to transition rapidly from low-power mode to active state, minimizing the delay between user input and tag response while maintaining energy efficiency during idle periods.
3Speed
If visual time-temperature indicators provide immediate visual results, then quick detection capability is improved, but measurement accuracy deteriorates
Solution Approach 1:
The patent introduces an electronic display as an intermediary between the accurate but invisible digital sensor data and the user. The display provides immediate visual feedback about temperature conditions while presenting the precise numerical data stored by the sensor, combining the speed of visual indication with the accuracy of electronic measurement.
Data Source
AI summary
A Radio Frequency Identification (RFID) tag according to one embodiment includes a controller, a sensor in communication with the controller, a local power source for providing power to the controller, and a user input device for receiving manual input from a user. A function is selectable by manipulation of the user input device. An RFID tag according to another embodiment of the present invention includes a controller having activate circuitry, the activate circuitry being for detecting a valid activate command in an incoming signal and causing the tag to wake from a hibernate state. An electronic display device is in communication with the controller. A local power source provides power to the controller. A user input device receives manual input from a user. The tag is normally in a hibernate state. Manipulation of the user input device wakes the tag from the hibernate state and/or allows function selection.