Backup Push-to-Talk Override for Stuck Microphone

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Solution Overview

Problem

In communication systems for vehicles, a stuck microphone condition can render voice communication impossible when the push-to-talk (PTT) switch fails, and existing stuck microphone time-out mechanisms can leave the microphone unusable if the issue is with the mechanical switch or its connection, especially without an alternate microphone.

Innovation Solution

A backup push-to-talk (PTT) function is implemented, which determines if a stuck microphone condition exists, alerts the user, and enables a backup PTT interface, allowing the user to activate a backup PTT button to override the stuck condition, with the option to change the time-out duration for transmission.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If a stuck microphone time-out mechanism is used to limit transmission duration, then transmission is limited to a predetermined duration, but the microphone becomes unusable if the source of the stuck condition is from the mechanical switch or connection

Engineering Contradiction:

Improvetransmission limitationVSAvoidmicrophone usability

Core Design Contradiction:

ReliabilityVSEase of operation

Solution Approach 1:

The system segments the PTT activation path into multiple independent interfaces: the primary mechanical PTT switch and the secondary software-based PTT button on the display unit. When the mechanical switch fails (stuck microphone condition), the system automatically enables the software-based alternative, allowing pilots to communicate through a different activation path without being completely disabled.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The audio control unit acts as an intermediary that monitors the status of the mechanical PTT switch and automatically activates the software-based PTT interface when a stuck microphone condition is detected. This intermediary function bridges the failure of the mechanical component by providing an automated transition to the software alternative.

Inventive Principle:

Principle #24Intermediary (Mediator)

2Ease of operation

If a mechanical PTT switch is used for push-to-talk activation, then voice communication can be initiated, but the system is prone to stuck microphone conditions when the switch fails

Engineering Contradiction:

Improvevoice communication activationVSAvoidswitch failure resistance

Core Design Contradiction:

Ease of operationVSReliability

Solution Approach 1:

The system implements multi-functionality by providing two distinct PTT activation methods: the traditional mechanical PTT switch on the microphone and a software-based PTT button on the display unit. Both interfaces serve the same function of activating voice communication, ensuring that if one method fails, the other can be used as a backup.

Inventive Principle:

Principle #6Universality (Multi-functionality)

Solution Approach 2:

The system prepares for potential switch failure by implementing a monitoring mechanism that detects stuck microphone conditions in advance. When a mechanical PTT switch failure is detected, the system automatically enables the software-based PTT interface as a pre-prepared backup, cushioning against the failure before it completely disables communication.

Inventive Principle:

Principle #11Beforehand cushioning (Prior cushioning)

3Reliability

If the stuck microphone time-out mechanism is activated, then transmission is limited to prevent continuous transmission, but voice communication becomes impossible without an alternate microphone

Engineering Contradiction:

Improvetransmission controlVSAvoidcommunication alternative

Core Design Contradiction:

ReliabilityVSAdaptability or versatility

Solution Approach 1:

The system dynamically adjusts the available PTT interfaces based on the detected condition. When a stuck microphone condition is detected, the system automatically transitions from relying solely on the mechanical PTT switch to enabling the software-based PTT button on the display unit, providing adaptability to the failure condition.

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

The system changes the operational parameters by switching from mechanical switch activation to software button activation. This parameter change allows the same PTT function to be achieved through a different interface modality, providing versatility when the original mechanical interface fails.

Inventive Principle:

Principle #35Parameter changes

Data Source

PatentUS10887451B2Method and system for providing backup push-to-talk function in stuck microphone condition

Publication Date: 2021.01.05 HONEYWELL INTERNATIONAL INC

AI summary

A method and system provide a backup push-to-talk (PTT) function for a transmitter in a stuck microphone condition. The method determines whether a stuck microphone condition exists in the transmitter, and if the stuck microphone condition exists, the method alerts a user that the stuck microphone condition exists. The method then enables a backup PTT interface for the transmitter such that a backup PTT button is available to the user to activate the backup PTT function. The method alerts the user when the backup PTT function is activated, and sends a message to a receiver after the backup PTT button is engaged by the user.