Vending Machine Item Quantity Detection Using Push Plate Consolidation
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Solution Overview
Problem
Vending machines are prone to errors when detecting the quantity of items in an item column, leading to inaccurate inventory and replenishment.
Innovation Solution
A method and vending machine design that uses a shielding member to prevent items from being delivered out of the column, causing them to abut against each other, allowing for accurate length measurement and quantity calculation by a length measuring device.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Extent of automation
If the vending machine uses automatic detection methods to identify item quantity, then the operation is automated and manpower is saved, but the detection accuracy is poor leading to inaccurate inventory
Solution Approach 1:
The push plate is controlled to push the items in the item column toward the outlet before detection. This preliminary action consolidates the items into a compact arrangement, eliminating gaps between them, which enables the length measuring device to accurately measure the total length of items and thereby calculate the correct quantity.
2Device complexity
If items are left in the item column without being pushed, then the structure remains simple, but gaps exist between items causing detection errors
Solution Approach 1:
The push plate is designed to be movable and controllable by the control device. It dynamically adjusts its position to push items toward the outlet only when needed for detection, rather than being a fixed structural element. This dynamic action consolidates items to eliminate gaps without requiring complex permanent structural modifications.
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
Improves the accuracy of detecting the quantity of items in the item column by eliminating gaps between items, resulting in more precise inventory management and replenishment.
Implementation Method 1
a length measuring device configured to detect a total length of the items in the item column
Data Source
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AI summary
Provided are a method for detecting quantity of items and a vending machine (010). The vending machine (010) includes: an item column (200) configured to temporarily store items, where the item column includes an outlet (210); a shielding member (500) configured to shield or open the outlet (210) of the item column; and a driving device (300) configured to drive the items in the item column (200) to move toward the outlet (210) of the item column. The method includes: controlling the shielding member (500) to shield the outlet (210) of the item column; driving the items in the item column (200) to move until the items in the item column abut against each other; detecting a total length of all items in the item column (200); and calculating (200) the quantity of items in the item column according to the total length of the all items and a length of a single item in the item column.