Transporting Apparatus Acoustic Sensor Control for Media Feeding
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Solution Overview
Problem
Existing double-feeding detection apparatuses in transportation systems face challenges in accurately distinguishing between single and double feeding of media, particularly due to variations in sound wave attenuation caused by environmental factors like temperature and amplitude distortion.
Innovation Solution
A transporting apparatus equipped with a speaker and microphone pair, where the controller adjusts settings based on the duration and amplitude of sound wave outputs to differentiate between single and double feeding, and adapts frequency to mitigate temperature effects, optimizing sensor control settings through a preadjustment process to enhance detection accuracy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the speaker driving time period is increased to improve detection accuracy, then the detection reliability is improved, but the processing time is increased
Solution Approach 1:
The patent performs preliminary determination of the speaker driving time period based on microphone output duration before actual detection. By pre-configuring optimal driving time parameters based on initial measurements, the system avoids repeated trial-and-error adjustments during actual operation, thereby improving detection reliability while minimizing processing time overhead.
2Measurement precision
If the output from the speaker or amplification degree is increased to improve detection accuracy, then the measurement precision is improved, but the energy consumption is increased
Solution Approach 1:
The patent dynamically adjusts the speaker output level and amplification degree based on the determined microphone output duration. Instead of using fixed high-power settings, the system adapts parameters in real-time: when shorter driving times are determined, lower output levels and amplification are used, while maintaining detection accuracy. This dynamic parameter adjustment reduces energy consumption while preserving measurement precision.
3Reliability
If multiple frequency adjustments are performed to compensate for temperature effects, then the reliability is improved, but the device complexity is increased
Solution Approach 1:
The patent compensates for temperature effects by adjusting the frequency parameter of the speaker output. When temperature variations cause frequency drift in the microphone output, the system modifies the driving frequency to maintain optimal detection conditions. This single-parameter adjustment approach achieves improved detection reliability without significantly increasing device complexity, as it relies on straightforward frequency modulation rather than complex multi-parameter control systems.
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 apparatus effectively differentiates between single and double feeding by adjusting settings based on microphone output, improving detection accuracy and reducing processing complexity, while compensating for environmental influences like temperature variations.
Implementation Method 1
a speaker 13a and a microphone 13b that are arranged opposite to each other with respect to a transportation path for media P... causing the microphone 13b to acquire a sound emitted by the speaker 13a and having passed through the medium P
Data Source
AI summary
A transporting apparatus includes a speaker and a microphone that are arranged opposite to each other with respect to a transportation path, and a controller that controls a transportation mechanism based on microphone output obtained by causing the microphone to acquire a sound emitted by the speaker. The controller uses the microphone to acquire the sound emitted by the speaker and changes, based on the microphone output, at least any of a time period during which the speaker is driven, output from the speaker, and the microphone output.