Vehicle Acoustic Monitoring Trigger Detection Power Reduction
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Solution Overview
Problem
Modern vehicle assistance systems face high power consumption due to continuous activation of devices for monitoring exterior and interior acoustic data, which is inefficient and not energy-effective.
Innovation Solution
A method and apparatus for airborne-sound acoustic monitoring that uses a device for trigger detection to activate speech and/or noise detection only when a trigger is detected, reducing power consumption by operating in a standby mode until a trigger is detected, and utilizing integrated trigger detection in microphones to further decrease energy usage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the device for speech and/or noise detection is continuously activated to ensure safety-related data collection, then the reliability of safety monitoring is improved, but the power consumption increases significantly
Solution Approach 1:
The device for speech and/or noise detection dynamically changes its operational state based on trigger detection. The device transitions between inactive, partially active (standby), and fully active states, allowing it to adapt its power consumption to the actual monitoring needs while maintaining safety reliability through rapid activation upon trigger events
Solution Approach 2:
The system employs periodic trigger-based activation rather than continuous operation. The trigger detection device continuously monitors for specific acoustic patterns, and when triggered, activates the speech and/or noise detection device for a limited period to perform detailed evaluation, then returns to standby mode, creating a periodic activation cycle that reduces overall power consumption
2Use of energy by moving object
If the device for speech and/or noise detection is put into inactive or partially inactive state to reduce power consumption, then the power consumption is reduced, but the continuous monitoring capability is compromised
Solution Approach 1:
The trigger detection device serves as an intermediary between the inactive speech/noise detection device and the acoustic environment. It continuously monitors acoustic signals in a low-power state and acts as a mediator that activates the main detection device when relevant events are detected, thereby maintaining monitoring capability without requiring continuous full-power operation
Solution Approach 2:
The trigger detection device performs preliminary acoustic monitoring and pre-evaluation of signals before activating the full speech and/or noise detection device. This preliminary action filters out irrelevant signals and only triggers full detection when potential safety-related events are detected, maintaining monitoring readiness while reducing power consumption during non-critical periods
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
This approach significantly reduces power consumption while ensuring continuous collection of safety-related data by activating devices only when necessary, enhancing energy efficiency in acoustic monitoring systems.
Implementation Method 1
airborne sound is converted to an electrical signal S with the aid of at least one microphone
Data Source
AI summary
The invention relates to a method for airborne-sound acoustic monitoring of an exterior and/or an interior of a vehicle, in which at least one microphone (1) is used to convert airborne sound into an electrical signal (S) and to route it for evaluation purposes to a device for voice and/or sound recognition (2). According to the invention, the electrical signal (S) is subjected to a pre-evaluation in a device for trigger detection (3), and detection of a trigger results in the device for voice and/or sound recognition (2) being moved from an inactive or partially active state to a fully active state by means of the device for trigger detection (3). Further, the invention relates to an apparatus for airborne-sound acoustic monitoring of an exterior and/or an interior of a vehicle and to a vehicle having such an apparatus. The subject matter of the invention is also a computer-readable storage medium.