Audio Sensor Media Integrity Detection in High-Speed Scanners
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Solution Overview
Problem
Existing methods for evaluating stacking and sorting integrity at the output of media processing apparatuses, such as document scanners, are inadequate due to limitations in optical and ultrasonic sensors, which struggle with accuracy in high-speed environments and cannot effectively assess media integrity in real-time, especially when media is stacked or sorted in tight spaces or during freefall, leading to potential damage and operational inefficiencies.
Innovation Solution
A method and apparatus that utilize audio sensors to acquire and process audio data in real-time, transforming it into stacking or sorting integrity values using time domain, frequency domain analysis, or neural networks to determine the operational integrity and trigger alerts or adjustments in document transport, ensuring timely intervention before failures occur.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If optical sensors are used to evaluate stacking and sorting integrity, then measurement capability is provided, but measurement precision deteriorates in high-speed environments
Solution Approach 1:
The patent replaces optical sensors with acoustic sensors (microphones) to detect media handling integrity. Acoustic sensors listen for characteristic sounds of proper media stacking and sorting, providing reliable detection in high-speed environments where optical sensors fail due to motion blur and timing issues.
Solution Approach 2:
The patent changes the detection parameter from optical reflection/transmission to acoustic frequency analysis. By analyzing acoustic frequencies in real-time, the system achieves both high-speed operation and precise measurement of media integrity without the limitations of optical methods.
2Reliability
If ultrasonic sensors are used to detect media integrity, then non-contact detection is achieved, but reliability deteriorates in tight spaces and during freefall
Solution Approach 1:
The patent substitutes ultrasonic sensors with acoustic sensors (microphones) that detect sound waves in the audible range. This replacement provides more reliable detection during media freefall and in tight stacking spaces, as acoustic sensors can capture sounds from any direction and are not limited by line-of-sight requirements.
Solution Approach 2:
The patent uses sound waves as an intermediary to detect media integrity. Instead of directly measuring media position or contact, the system listens for characteristic acoustic signatures of proper stacking and sorting, providing reliable detection without complex sensor positioning.
3Loss of time
If real-time audio analysis is implemented, then response time is reduced, but device complexity increases
Solution Approach 1:
The patent applies partial action by focusing acoustic analysis only on specific frequency ranges characteristic of media handling sounds. Rather than analyzing the entire audio spectrum, the system targets relevant frequencies, reducing processing complexity while maintaining real-time response capability.
Solution Approach 2:
The patent implements continuous feedback by constantly monitoring acoustic signals and immediately responding to integrity violations. The system provides real-time feedback to control the media transport system, adjusting operation to prevent damage while maintaining high processing speeds.
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
This approach provides real-time assessment and intervention capabilities, preventing media damage and operational disruptions by accurately determining stacking or sorting integrity, even in high-speed and complex environments, allowing for immediate adjustments to document transport and redirecting media as needed.
Implementation Method 1
acquiring audio data substantially in real-time from the output device of the high-speed apparatus
Data Source
AI summary
A method for evaluating stacking or sorting integrity at an output device of a high-speed apparatus that processes media includes: acquiring an audio data substantially in real-time from the output device of the high-speed apparatus while the high-speed apparatus is in operation, by use of an audio sensor located at the output device; transforming by a processor, the audio data to into a stacking or sorting integrity value; and if the stacking or sorting integrity value exceeds a predetermined threshold, stopping by the processor a document transport of the high-speed apparatus. An apparatus for evaluating stacking or sorting integrity at an output device, and a system for evaluating stacking or sorting integrity at an output device of a high-speed apparatus are also described.