Sound Interference Avoidance in Warehouse Scanners
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Solution Overview
Problem
In warehousing and logistics, scanner-equipped mobile devices often cause confusion due to identical sound confirmation signals, leading to incorrect assumptions about successful scans when multiple devices are within audible distance.
Innovation Solution
The implementation of a system where devices communicate with each other or a server to determine currently used sounds and select a unique sound for confirmation based on usage by other devices, reducing sound interference by choosing a sound that is least used or different from others, and ensuring the selected sound expires after a set time.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If all devices use the same confirmation sound, then device simplicity is maintained, but sound interference and worker confusion increase
Solution Approach 1:
Each device is assigned a unique sound characteristic (different frequency, pitch, or tone) based on its local identification, so that while all devices maintain simple operation, each produces a distinct sound that can be differentiated by workers in the environment
Solution Approach 2:
The patent applies the analogy of color differentiation to sound differentiation - just as colored tags or labels help distinguish objects, different sound characteristics (the acoustic equivalent of color) allow workers to distinguish between multiple device confirmation sounds, reducing confusion while maintaining operational simplicity
2Object-affected harmful factors
If devices use unique sounds to avoid interference, then sound collision is reduced, but device complexity increases
Solution Approach 1:
The system performs preliminary sound assignment before devices are deployed or activated. Each device receives its unique sound characteristic in advance through configuration files, database records, or initial setup procedures, eliminating the need for complex real-time sound selection algorithms during operation
Solution Approach 2:
A central server or configuration system acts as an intermediary that manages sound assignment. The server stores the mapping between device identifiers and sound characteristics, handling the complexity of sound allocation centrally while keeping individual devices simple in their sound playback functionality
3Object-affected harmful factors
If devices continuously check sound usage, then sound interference is minimized, but communication overhead and system latency increase
Solution Approach 1:
Sound assignments are determined in advance and stored locally on each device. The unique sound characteristic is configured before the device begins operation, eliminating the need for continuous communication checks to determine sound availability
Solution Approach 2:
Each device independently uses its pre-assigned sound without needing to query other devices or a central server during operation. The device self-determines which sound to play based on its own configuration, eliminating communication overhead while maintaining sound interference avoidance
Data Source
AI summary
A device and method of sound interference avoidance is provided. The device includes: a speaker; an electronic component; a memory storing data defining a plurality of different sounds associated with a given action at the electronic component; a communication interface; and, a controller configured to: communicate, using the communication interface, with one or more of a server and other devices to determine sounds currently in use by the other devices; select one sound, of the plurality of different sounds, to indicate the given action based on the sounds in use by the other devices; and, when the given action is detected at the electronic component, control the speaker to play the one sound that has been selected.