Guide Robot Wake-Up Word Recognition and Greeting Handling
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Solution Overview
Problem
Guide robots face usability issues when interacting with users, particularly children and the elderly, as they struggle to recognize wake-up words, leading to increased false recognition rates and decreased performance, especially when users intend to simply greet rather than seek specific information.
Innovation Solution
A guide robot equipped with a voice receiving unit, control unit, and wireless communication unit that determines the presence of a preset wake-up word and outputs customized responses based on user interactions, including greeting recognition and sensor data, to provide friendly and appropriate responses even without specific queries.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the guide robot uses a preset wake-up word for activation, then the robot can be reliably activated for specific tasks, but the false recognition rate increases when users simply want to greet
Solution Approach 1:
The patent segments the voice recognition process into two distinct stages: wake-up word detection and greeting recognition. The control unit first determines whether a wake-up word is present, and only if not present, proceeds to recognize greetings. This segmentation allows the system to handle wake-up commands and greetings separately, reducing false recognition while maintaining reliable activation.
Solution Approach 2:
The system dynamically adjusts its recognition mode based on the detected voice content. When a wake-up word is detected, the AI server is activated for task-specific processing. When no wake-up word is detected, the system switches to greeting recognition mode, providing dynamic adaptation to different user intents and reducing false positives.
2Measurement precision
If the guide robot activates AI server for every voice input, then specific information requests can be processed accurately, but energy consumption increases and response time delays occur for simple greetings
Solution Approach 1:
The control unit performs preliminary analysis of the voice input to determine whether it contains a wake-up word before activating the AI server. This preliminary action filters out simple greetings that don't require AI processing, preventing unnecessary energy consumption and response delays while ensuring accurate processing when needed.
Solution Approach 2:
The system applies partial action by selectively activating the AI server only when necessary (when wake-up words are detected), rather than for every voice input. This partial activation approach reduces energy consumption and response time for common greetings while maintaining full processing capability for information requests.
3Productivity
If the guide robot recognizes only wake-up words, then task execution is efficient, but user friendliness and natural conversation capability decrease
Solution Approach 1:
The control unit is designed with multi-functionality, capable of both wake-up word detection and greeting recognition. This universal design allows the robot to efficiently execute tasks when wake-up words are used while also providing friendly, natural conversation responses to greetings, accommodating diverse user needs without compromising either efficiency or friendliness.
Data Source
AI summary
The present disclosure relates to a guide robot and a method of operating the same. A guide robot according to the present disclosure includes a voice receiving unit to receive a voice, a controller to determine whether the received voice includes a preset wake-up word, and a wireless communication unit to perform communication with an artificial intelligence (AI) server set to be activated by the preset wake-up word. At this time, the control unit transmits the received voice to the artificial intelligence server, receives result information from the artificial intelligence server, and outputs the received result information, when the received voice includes the preset wake-up word. And, the control unit outputs a response voice selected according to a predetermined reference when the received voice does not include the preset wake-up word. The guide robot may be operated by artificial intelligence.