Sound Sensor Vent Path for Paper Dust Cleaning
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Solution Overview
Problem
In paper conveyance apparatuses, foreign matter such as paper powder and dust can adhere to or intrude into sensors detecting sounds in the conveyance path, leading to sensor failure and sensitivity degradation.
Innovation Solution
A paper conveyance apparatus is designed with a housing, a guide member, and a sound signal generator, featuring a vent path for cleaning the sound receiving aperture using air blows, which communicates with both the interior and exterior of the space between the housing and the guide member, reducing foreign matter adhesion and intrusion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a sensor for detecting sound generated in the conveyance path is provided, then jam occurrence may be detected, but foreign matter such as paper powder and dust adheres to or intrudes into the sensor causing sensor failure and sensitivity degradation
Solution Approach 1:
A vent path is introduced as an intermediary structure between the sound receiving aperture and the external environment. This vent path includes a flow regulating member that controls air flow, preventing direct intrusion of foreign matter while maintaining the cleaning effect. The vent path acts as a mediator that allows controlled air exchange without permitting dust and paper powder to reach the sensor.
Solution Approach 2:
The invention utilizes pneumatic principles by employing air flow through the vent path to clean the sound receiving aperture. A flow regulating member controls the air flow rate, creating a pneumatic cleaning mechanism that removes foreign matter from the sensor surface without direct contact, thereby preventing adhesion and intrusion of foreign matter while maintaining jam detection reliability.
2Measurement precision
If the sound receiving aperture is exposed to the conveyance path environment, then sound detection is effective, but foreign matter accumulates on the aperture reducing detection accuracy
Solution Approach 1:
The vent path with flow regulating member performs preliminary cleaning action by continuously or periodically introducing air flow to remove foreign matter from the sound receiving aperture before it accumulates to harmful levels. This preliminary maintenance ensures the aperture remains clean and functional, maintaining sound detection accuracy without requiring manual intervention.
Solution Approach 2:
The vent path serves as an intermediary cleaning mechanism between the external environment and the sound receiving aperture. It allows controlled air flow to reach the aperture for cleaning purposes while preventing direct exposure to the conveyance path environment where foreign matter accumulates, thus maintaining detection accuracy while protecting sensor functionality.
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 solution effectively prevents foreign matter from adhering to and intruding into the sound sensors, maintaining their sensitivity and functionality, thereby enhancing the detection of jam occurrences in the conveyance path.
Implementation Method 1
a vent path for cleaning the sound receiving aperture by an air blow to the sound receiving aperture
Data Source
AI summary
A paper conveyance apparatus including a housing, a guide member for guiding a paper conveyed in a paper conveyance path, the guide member being attached to the housing, a sound signal generator for generating a sound signal in response to a sound detected through a sound receiving aperture disposed in a space between the housing and the guide member, and a vent path for cleaning the sound receiving aperture by an air blow to the sound receiving aperture, the vent path communicating with the interior and exterior of the space between the housing and the guide member.