Receiver Unit Energy Reduction via Periodic Activation
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Solution Overview
Problem
Conventional RFID-based access control systems for elevators and closed spaces consume significant electrical energy due to continuous electromagnetic field emission for establishing contact with transponders.
Innovation Solution
A method that temporarily activates the receiver unit only when needed, using a mobile communications unit to transmit an activation signal and access code via near-field communication standards like Bluetooth or NFC, reducing energy consumption by controlling the power supply based on usage frequency and ensuring secure access within a specific range.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the receiver unit permanently radiates an electromagnetic field to establish contact with the transponder, then contactless identification is achieved, but electrical energy consumption increases significantly
Solution Approach 1:
The receiver unit alternates between active and deactivated states, radiating electromagnetic fields only periodically when access control is needed rather than continuously. This periodic operation maintains the ability to establish contactless identification while significantly reducing overall electrical energy consumption.
Solution Approach 2:
The system dynamically switches the receiver unit between operational and deactivated states based on whether access control is required. This dynamic state change allows the system to adapt its energy consumption to actual usage needs, maintaining reliability when needed while minimizing energy waste during non-use periods.
2Use of energy by moving object
If the receiver unit is deactivated during non-use periods, then energy consumption is reduced, but the system must quickly activate when access is needed
Solution Approach 1:
The receiver unit is kept in a deactivated state with the capability for rapid activation. By preliminarily preparing the system in a low-power state while maintaining activation readiness, the system can quickly transition to operational mode when needed, balancing energy savings with responsive activation.
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
Significantly reduces energy consumption by keeping the receiver unit in a deactivated state during non-use periods and ensures secure access control using conventional mobile devices, minimizing unauthorized access.
Implementation Method 1
transmitting an activation signal by the communications unit within a predetermined range
Implementation Method 2
The receiver unit thereupon checks the access code and frees the access if the check is successful
Data Source
AI summary
A method of controlling access to an area accessible by persons, particularly to a space closed by a door, utilizes a first mobile communications unit on which at least one access code is filed and a receiver unit for receiving the access code. In a first variant of the method, when an activation signal is transmitted by the communications unit within a predetermined range of the receiver unit, the receiver unit is activated and the access code is transmitted from the communications unit to the receiver unit. After a successful check of the access code by the receiver unit the access is freed. In a second variant, when the activation signal is transmitted by the receiver unit within a predetermined range of the communications unit, the receiver unit is activated. The access code is subsequently transmitted from the communications unit to the receiver unit and after a successful check of the access code by the receiver unit the access is freed.