Vending Product Gate Timing for Smooth Retrieval Transfer
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Solution Overview
Problem
Vending machines face challenges in smoothly transitioning products from storage columns to customer-accessible retrieval locations due to product size and shape variability, leading to issues like bridging and tilting, which limits the types of products that can be reliably dispensed.
Innovation Solution
A vending machine system with a chassis, shelves, product gates, a movable stage, and a retrieval platform, controlled by a controller that adjusts gate opening and closing speeds based on product dimensions and codes to ensure smooth product delivery, using pulse width modulation signals to manage the timing of gate operations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a fixed gate timing mechanism is used for product delivery, then the device complexity is reduced, but the reliability of product delivery deteriorates due to bridging and tilting issues with varied product sizes and shapes
Solution Approach 1:
The gate timing mechanism transitions from a fixed static configuration to a dynamic adjustable system. The controller modifies gate opening and closing timings based on detected product characteristics, allowing the system to adapt to different product sizes and shapes while maintaining reliable delivery without excessive complexity
Solution Approach 2:
The system changes the timing parameters (duration and sequence) of gate operations based on product code and storage location. By retrieving specific timing parameters from memory and adjusting gate operation durations, the system resolves the contradiction between reliability and complexity through parameter optimization rather than structural complexity
2Productivity
If the gate opens quickly to improve productivity, then the product delivery speed increases, but the harmful factors increase due to product bridging and tilting during transition
Solution Approach 1:
The gate operation is divided into periodic phases (opening phase, held open phase, closing phase) with specific durations retrieved from timing parameters. This periodic control allows the product to transition smoothly through each phase, maintaining productivity while preventing bridging and tilting harmful effects
Solution Approach 2:
The system pre-retrieves optimal timing parameters from memory based on product code and storage location before gate operation. These parameters are designed to cushion the product transition by controlling the rate and duration of gate opening, preventing bridging and tilting before they can occur
Data Source
AI summary
A vending machine comprises a chassis, a shelf system including a plurality of product rows, a plurality of product gates each coupled to an associated one of the plurality of product rows, a movable stage, a retrieval platform, and a vending machine controller coupled to at least one memory. The vending machine controller is configured to determine a product code and a storage location of a selected product for vending, retrieve, from the at least one memory, timing parameters associated with at least one of the product code or the storage location of the selected product, and control one or more timings of one of the plurality of product gates associated with the determined storage location of the selected product, based on the retrieved timing parameters, to release the selected product from the shelf system to the retrieval platform.