Facsimile Photo Relay Backup From Rectified Incoming Calls
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Solution Overview
Problem
Facsimile apparatuses with photo relays cannot maintain connection to a telephone line during a power outage, preventing the connected telephone set from recognizing incoming calls.
Innovation Solution
A facsimile apparatus equipped with a rectifying unit to convert incoming call signals into DC power, a rechargeable battery to store this power, and a microcontroller to control the photo relay, ensuring the telephone set remains connected to the line during power outages.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Duration of action of stationary object
If a photo relay is used to switch connection between telephone set and telephone line, then service life of the facsimile apparatus is extended, but the telephone set cannot be used during power outage
Solution Approach 1:
The system performs preliminary action by charging the battery during periods when power is available and incoming calls are received. The rectifying unit converts incoming call signals into DC power that is stored in the battery, preparing energy reserves in advance. This allows the photo relay to be activated later during power outages without requiring continuous external power supply.
Solution Approach 2:
The system implements self-service by using the incoming call signal itself as the power source to charge the battery. The rectifying unit converts the incoming call signal into DC power that charges the battery, which then powers the photo relay when needed. This eliminates the need for external power during outages and removes the need for large backup power supplies.
2Ease of operation
If a photo relay requires external electric power to maintain connection, then electrical switching is achieved, but connection cannot be maintained during power outage
Solution Approach 1:
The system achieves self-service by converting the incoming call signal into DC power through the rectifying unit, which then charges the battery. This stored energy powers the photo relay when needed, eliminating dependency on external power sources while maintaining electrical switching capability.
Solution Approach 2:
The battery acts as an intermediary energy storage device between the incoming call signal and the photo relay. It receives energy from the rectified incoming call signal and releases it to power the photo relay during outages, decoupling the photo relay from direct external power dependency.
3Reliability
If large backup power supply is used to maintain photo relay operation, then availability during power outage is improved, but device complexity and size increase
Solution Approach 1:
The system uses the incoming call signal itself as the power source, converting it through the rectifying unit to charge the battery. This eliminates the need for large external backup power supplies, as the call signal provides sufficient energy to power the photo relay during outages.
Solution Approach 2:
The system changes the power source parameter from external mains power to internally generated DC power from the incoming call signal. This parameter change allows the use of a small battery instead of a large backup power supply, reducing device complexity and size while maintaining reliability during outages.
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
Enables the telephone set to function during power outages by temporarily powering the photo relay using stored DC power from incoming call signals, extending the apparatus' usability without requiring large backup power supplies.
Implementation Method 1
a rectifying unit that rectifies a signal at a time when an incoming call from the telephone line arrives into DC power
Implementation Method 2
a holding unit that holds the DC power obtained by rectification by the rectifying unit
Data Source
AI summary
A facsimile apparatus includes a photo relay that switches a state of connection between an externally connected telephone set and a telephone line; a rectifying unit that rectifies a signal at a time when an incoming call from the telephone line arrives into DC power; a holding unit that holds the DC power obtained by rectification by the rectifying unit; and a switching controller that performs control in such a manner that supply of the DC power held in the holding unit to the photo relay causes the externally connected telephone set to be connected to the telephone line.