Portable Sensor Tag Wireless Key Setting and Power Management
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Solution Overview
Problem
Conventional sensor tags for health management face challenges in efficiently managing power supply and maintaining data confidentiality, particularly due to the inability to turn off the power source once it is activated, leading to battery wastage and increased management work, as well as hygiene concerns when sterilized packages are opened for key setting.
Innovation Solution
A portable data encryption device with a wireless communication circuit that receives an encryption key wirelessly, allowing the power supply to be switched on only when needed, and an encryption circuit that encrypts data using the stored key, preventing battery wastage and maintaining sterility during key setting.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the power supply is turned on for key setting, then the encryption key can be set, but the battery is wasted and cannot be turned off
Solution Approach 1:
The power supply operation is segmented into two distinct phases: a first power supply phase for receiving the encryption key wirelessly, and a second power supply phase for encrypting and storing data. This segmentation allows the system to turn off the power supply between phases, preventing battery wastage while maintaining key setting capability.
Solution Approach 2:
The power supply state is made dynamic rather than static. The system can transition between powered-off and powered-on states based on operational needs. The controller manages power supply activation only when required for specific operations (key reception or data encryption), allowing the power supply to be turned off otherwise, thus addressing the battery wastage issue.
2Ease of operation
If the sterilized package is opened for key setting, then the key can be set, but hygiene is compromised
Solution Approach 1:
The mechanical action of opening a sterilized package is replaced by wireless communication. The encryption key is transmitted wirelessly to the sensor tag without requiring physical access to or opening of the sterilized packaging, thereby maintaining hygiene integrity while enabling key setting.
Solution Approach 2:
A wireless communication interface acts as an intermediary between the key setting process and the sensor tag. This intermediary allows key transmission without direct physical contact or package opening, preserving the sterile state of the packaging while achieving the key setting function.
3Loss of energy
If a switch mechanism is added to turn off power supply, then battery wastage is prevented, but device complexity increases
Solution Approach 1:
The system uses its existing controller and operational protocols to manage power supply activation automatically based on operational state. Rather than adding a separate switch mechanism, the controller itself serves the dual purpose of data processing and power management, turning the power supply on only when needed for key reception or data encryption operations.
Solution Approach 2:
The controller is given multi-functionality, serving both as the data processing unit and as the power management unit. By combining these functions into a single component, the system avoids adding separate switch mechanisms while still achieving battery wastage prevention through intelligent power control.
4Productivity
If the power supply remains on after key setting, then the system is ready for immediate use, but management work increases
Solution Approach 1:
The power supply operates in periodic intervals rather than continuously. It is activated periodically for specific operations (key reception, data encryption) and turned off in between. This periodic operation reduces management time and battery consumption while maintaining system readiness when needed.
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
The solution prevents battery wastage and allows for secure, efficient data encryption without breaking sterilized packages, simplifying management and ensuring data confidentiality.
Implementation Method 1
a wireless communication circuit which receives a wireless activation signal from an external terminal, and, in an operation using electromotive force generated by the received activation signal
Implementation Method 2
a primary cell which supplies power
Data Source
AI summary
A portable data sensor tag includes a memory, a data communication circuit which receives a wireless activation signal from an external terminal, and, in an operation using electromotive force generated by the received activation signal, receives an encryption key from the external terminal and stores the received encryption key in the memory. A power source supplies power, an insulator which switches a power supply from the power source from off to on, and a sensor circuit reads the encryption key from the memory, encrypts measured data using the read encryption key, and stores the encrypted measurement data in the memory. The sensor circuit operates using the power supplied from the power source after the power supply from the power source is switched on.