Waste Container Access Control With Low-Power Linux CPU
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Solution Overview
Problem
Existing microcontroller-based systems for controlling access to waste containers are inflexible in adding new functionalities, user interfaces, or hardware peripherals, and suffer from high electrical power consumption, necessitating frequent battery replacements.
Innovation Solution
An electronic system using a Central Processing Unit (CPU) with an operating system, such as Linux, allows easy addition or modification of functionalities, interfaces, and peripherals, and incorporates a stand-by mode to minimize power consumption, using photovoltaic panels for power and virtual memory to enhance stability and security.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a microcontroller-based architecture is used to control access to a waste container, then the system can perform basic access control functions, but it lacks flexibility when adding new functionalities, user interfaces, or hardware peripherals
Solution Approach 1:
The patent applies universality by implementing a standardized driver architecture where a common operating system and driver framework can support multiple types of hardware peripherals (RFID readers, cameras, sensors, actuators) through uniform interfaces. This allows the same core system to perform diverse functions by simply adding or configuring different hardware components without redesigning the entire architecture.
Solution Approach 2:
The patent segments the system into distinct modular components: the operating system kernel, device drivers, application layers, and hardware peripherals. Each component operates independently with well-defined interfaces, allowing individual modules to be added, modified, or removed without affecting the overall system stability and enabling flexible functionality expansion.
2Reliability
If a microcontroller-based system operates continuously to provide access control, then it can respond to user requests, but it consumes high electrical power requiring frequent battery replacements
Solution Approach 1:
The patent implements periodic action by putting the microcontroller into low-power sleep modes between access control events. The system activates only when triggered by specific events (e.g., detection of a user approaching, RFID tag presentation, or button press), performing its function briefly then returning to a low-power state, thereby significantly reducing average power consumption while maintaining reliability.
Solution Approach 2:
The system incorporates energy harvesting through photovoltaic panels that automatically recharge the battery during daytime operation. This self-service mechanism reduces the frequency of manual battery replacements and extends the operational lifecycle of the access control system without requiring continuous external power intervention.
3Adaptability or versatility
If software is updated to add new functionalities or modify existing ones, then the system becomes more versatile, but the stability of the high-level application software may be compromised
Solution Approach 1:
The patent segments software into a stable kernel layer and a flexible application layer. The operating system kernel and core driver framework remain unchanged and protected, while new functionalities are added as separate application programs or modules that interact through standardized APIs. This segmentation allows software updates and functionality expansion without compromising the stability of the core system.
Solution Approach 2:
The patent introduces an intermediary layer of standardized device drivers and abstraction interfaces between the hardware and application software. This intermediary provides stable, well-defined contracts that allow application developers to add new functionalities without directly modifying or risking the stability of the underlying operating system or hardware control code.
4Speed
If the system switches from stand-by mode to active mode quickly, then user perception of delay is minimized, but power consumption during switching increases
Solution Approach 1:
The patent uses periodic action by implementing event-triggered wake-up mechanisms where the system remains in low-power stand-by mode and only transitions to active mode when specific events occur (e.g., motion detection, RFID tag detection, or button press). This approach minimizes the frequency and duration of high-power states while maintaining fast response to actual user needs.
Solution Approach 2:
The patent applies preliminary action by using low-power sensors (such as motion sensors or proximity sensors) that continuously monitor for user presence in stand-by mode. When these sensors detect a user approaching, they trigger the main system to wake up in advance, allowing the system to be fully ready by the time the user interacts with it, thus maintaining fast perceived response while avoiding premature activation of high-power components.
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 system provides flexibility in adding or modifying features, reduces electrical power consumption, extends battery life, and ensures robustness against cyber threats, enabling efficient waste management with minimal maintenance.
Implementation Method 1
using photovoltaic panels for power
Data Source
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AI summary
It is disclosed an electronic system (1) to control the access of a user to a waste container. The system comprises a Central Processing Unit (2), a volatile central memory (3), a non-volatile memory (4), a short-distance wireless signal transceiver (20, 5, 6, 7), a power supply battery, a circuit to manage electrical energy flows and a photovoltaic panel. The central memory is configured to store the object code of the running operating system and the object code of the running software program and data of the software program. The Central Processing Unit is configured to receive a signal indicative of the value of a user identifier or indicative of an authenticated command or of an invalidity command, to verify whether the user is authorized to deliver waste in the waste container, by means of a verification of the validity of at least part of said user identifier or by means of the verification of reception of said authenticated command or of said invalidity command, and to generate, as a function of the outcome of said verification, a driving signal (S_drv) to lock or unlock the electro-mechanical lock of the waste container.