Drop Box Deposit Sensing With Low-Power Tray-Triggered Detection
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Solution Overview
Problem
Traditional drop boxes require substantial time and effort for personnel to determine if items have been deposited, as retrieving items is a manual and time-consuming process, necessitating a more efficient monitoring system.
Innovation Solution
Integration of sensor systems within drop boxes that include tray movement sensors, item detection sensors, and an onboard controller to monitor and transmit status data, minimizing power consumption and automating the detection of items deposited, allowing for alerts to be sent to mobile devices.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If manual monitoring of drop box contents is used, then device complexity is reduced, but time consumption for personnel increases
Solution Approach 1:
The patent replaces manual mechanical monitoring with an automated sensor-based system. Sensors detect items deposited in the drop box and transmit signals to a central server, eliminating the need for personnel to physically check each drop box and significantly reducing time consumption.
Solution Approach 2:
The drop box system performs self-monitoring through integrated sensors that automatically detect when items are deposited. The system autonomously tracks its own contents and communicates status information, eliminating the need for external manual inspection.
2Measurement precision
If continuous sensor activation is used, then detection accuracy is improved, but power consumption increases
Solution Approach 1:
The sensor system operates periodically rather than continuously. Sensors are activated at specific intervals or triggered by events such as tray movement, maintaining adequate detection capability while significantly reducing overall power consumption compared to continuous operation.
Solution Approach 2:
The system uses tray movement sensors as preliminary detectors that trigger item detection sensors only when needed. This preliminary action allows the main detection sensors to remain inactive until a deposit event is likely, preserving detection accuracy while minimizing power consumption.
3Reliability
If multiple sensors are integrated, then monitoring reliability is improved, but device complexity increases
Solution Approach 1:
The monitoring system is segmented into distinct functional components: tray movement sensors, item detection sensors, and a central server. Each component has a specific function, and their coordinated operation provides reliable monitoring while keeping individual components relatively simple and manageable.
Solution Approach 2:
The sensor system is designed with multi-functionality, where sensors can detect various conditions (tray movement, item presence, deposit events) and the central server handles multiple tasks (receiving signals, tracking contents, generating reports). This universal design improves reliability without proportionally increasing complexity.
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 sensor system effectively monitors drop box contents without significant time investment by personnel, enabling timely retrieval of items and optimizing collection processes.
Implementation Method 1
an infrared or other optical sensor system (e.g., light curtain sensor, time-of-flight sensor, and/or the like) configured to detect items sliding off of the tray and into the interior of the drop box
Implementation Method 2
the one or more tray movement sensors may comprise an accelerometer configured to detect an angle of rotation of the movable deposit tray
Data Source
AI summary
An item drop box sensor system for detecting items deposited within a drop box may be configured to detect movement of an item deposit tray and to detect items deposited within the drop box. The drop box sensor system may comprise one or more tray movement sensors for detecting movement of the deposit tray, one or more item detection sensors configured to detect items passing into the drop box via the deposit tray, and an onboard controller for selectively activating the various sensors to conserve power and for transmitting data indicative of the status of the drop box to a central server configured for scheduling item pickups for various geographically spaced drop boxes.