Circuit Breaker Tamper Detection via RFID and Power Harvesting
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Solution Overview
Problem
Circuit breakers and other electrical equipment often lack authentication mechanisms, making it difficult for users to detect unauthorized tampering or counterfeit products, which poses safety risks and liability concerns.
Innovation Solution
A circuit breaker apparatus with a housing, display, controller, and power control device that uses RFID tags and a power harvester to authenticate the device and indicate tampering through a display state change, ensuring the display remains altered even without power, preventing unauthorized resetting.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If circuit breakers are purchased from unauthorized resellers or dealers, then cost may be reduced, but authenticity and safety cannot be verified
Solution Approach 1:
The patent uses RFID tags that contain copied authentication data from the original manufacturer's database. These tags can be read remotely to verify authenticity without requiring complex physical inspection mechanisms, resolving the contradiction between reliability verification and device complexity
Solution Approach 2:
The patent introduces an intermediary authentication system consisting of RFID tags and reader devices. This intermediary layer enables verification of circuit breaker authenticity without requiring direct access to manufacturer databases or complex cryptographic verification, simplifying the overall system while maintaining reliability
2Reliability
If circuit breakers are reconditioned or tampered with, then they may be made available at lower cost, but safety risks increase
Solution Approach 1:
The RFID tag contains a copied unique identifier and authentication data that is verified against the manufacturer's database. This simple copying mechanism enables tampering detection without requiring complex sensors or monitoring systems
Solution Approach 2:
The patent replaces complex mechanical tamper-evident seals or physical inspection mechanisms with electronic RFID authentication. This substitution reduces device complexity while improving reliability of tampering detection through remote electronic verification
3Ease of operation
If authentication data is stored in RFID tags, then verification becomes easier, but power consumption increases
Solution Approach 1:
The RFID tag system uses feedback loops where the tag transmits authentication data only when energized by the reader's electromagnetic field. The system receives feedback from the reader about whether authentication is needed, transmitting data only during verification events rather than continuously, reducing overall power consumption while maintaining ease of operation
Solution Approach 2:
The authentication process occurs periodically only when verification is needed, rather than continuously. The RFID tag is activated intermittently during authentication events, reducing average power consumption while maintaining ease of operation when authentication is required
4Loss of information
If display shows tampering status, then user awareness increases, but display power requirements increase
Solution Approach 1:
The patent uses color-changing indicators or LED displays that show different colors for authenticated versus tampered states. This visual encoding transmits tampering information efficiently using minimal power compared to text-based displays or continuous illumination
Solution Approach 2:
The display updates its state periodically only when authentication results are available, rather than continuously refreshing. This reduces power consumption while ensuring users receive tampering information when relevant
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
Effectively authenticates the circuit breaker and detects tampering, providing users with a visible indication of authenticity or tampering, thereby enhancing safety and preventing potential hazards.
Implementation Method 1
The power control device is configured to harvest electrical energy from the circuit to power the controller and display during tampering events
Implementation Method 2
The display is configured to change from a first state to a second state in response to receiving the indication. The first state indicates that the circuit breaker has been authenticated and the second state indicates that the circuit breaker has been tampered with
Data Source
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AI summary
A circuit breaker apparatus may include a housing, a circuit inside the housing for protecting the conductors and the load of the circuit, a display attached to outside of the housing, a controller, and a power control device. The display may be an electronically- alterable display that does not require power in situations other than changing its state. The power control device may provide power to the controller and the display when the apparatus is being tampered with. When the controller is powered, it may cause the power control device to cause the display to change from a state that indicates that the apparatus is authenticated to another state that indicates that the apparatus has been tampered with. The power control device may include a battery and a switch, or a power harvester, which can be configured to provide power to the controller when the apparatus is being tampered with.