Self-Powered Acoustic Sensing for In-Flight Aircraft Damage Detection
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Solution Overview
Problem
Aircraft are vulnerable to internal and external damage during flight, leading to challenges in accurately identifying and addressing performance issues, which results in prolonged on-ground time and potentially inadequate repairs, compromising airworthiness and maintenance efficiency.
Innovation Solution
An acoustic detection system powered by a kinetic energy harvester that converts vibrations into electrical power and wirelessly transmits it to an acoustic sensor to detect and process acoustic signals, enabling real-time monitoring and analysis of aircraft conditions, including damage or performance issues.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If visual inspection methods are used by aircraft crew and ground crew to identify damage or performance issues, then the system is simple and requires no additional power sources, but the detection accuracy is insufficient leading to over or under reporting of damage
Solution Approach 1:
The acoustic sensor is powered by a kinetic energy harvester that converts ambient vibrations into electrical energy, enabling the sensor to power itself autonomously without requiring external power sources or batteries. This self-service mechanism eliminates the need for complex wiring and power management systems while maintaining high detection accuracy through continuous operation
Solution Approach 2:
The patent replaces manual visual inspection with an automated acoustic detection system that uses acoustic sensors to detect and analyze sounds indicative of damage. This substitution of mechanical human inspection with automated sensing technology significantly improves detection accuracy while the kinetic energy harvesting provides autonomous power without complex infrastructure
2Productivity
If manual visual inspection and reporting processes are used to identify aircraft damage, then no additional power sources are required, but the on-ground time for damage identification and repairs is prolonged
Solution Approach 1:
The acoustic detection system continuously monitors and detects damage during flight operations before the aircraft lands. By performing preliminary detection in-flight, the system provides advance notice of damage conditions, allowing maintenance personnel to prepare appropriate repairs beforehand, thus significantly reducing the on-ground time required for damage identification and repair execution
Solution Approach 2:
The system provides real-time feedback about aircraft condition through acoustic monitoring during flight. This continuous feedback loop enables immediate detection and reporting of damage issues, eliminating the delay associated with manual post-flight inspection and allowing for more efficient scheduling and execution of maintenance activities
3Measurement precision
If comprehensive acoustic monitoring is implemented throughout the aircraft, then detection accuracy improves, but the device complexity and power requirements increase
Solution Approach 1:
Each acoustic sensor is equipped with its own kinetic energy harvester that converts local vibrations into electrical power, enabling the sensor to be completely self-powered. This eliminates the need for centralized power distribution systems and allows for dense deployment of multiple sensors throughout the aircraft to achieve comprehensive monitoring coverage without proportionally increasing overall power consumption
Solution Approach 2:
The acoustic monitoring system is divided into multiple independent sensor nodes distributed throughout the aircraft, each with its own kinetic energy harvesting mechanism. This segmentation allows each sensor to operate autonomously using locally harvested energy from vibrations at its specific location, enabling comprehensive coverage while keeping individual power requirements minimal and distributed
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 system enhances the accuracy of damage detection and maintenance by providing real-time data for informed decision-making, reducing on-ground time and ensuring proactive and targeted maintenance practices, thereby improving aircraft safety and efficiency.
Implementation Method 1
The kinetic-energy harvester is configured to convert vibrations, at the first location of the vibration-generating object when the vibration-generating object is generating vibrations, into electrical power
Implementation Method 2
The acoustic sensor is configured to wirelessly receive the electrical power from the kinetic-energy harvester, detect acoustic signals proximate to the second location of the vibration-generating object using the electrical power, and convert the detected acoustic signals into acoustic data
Data Source
AI summary
An acoustic detection system and method and associated kinetic energy harvester is disclosed. The acoustic detection system comprises a vibration-generating object, a kinetic-energy harvester, and an acoustic sensor. The kinetic-energy harvester is embedded within a first location of the vibration-generation object and is configured to wirelessly transmit electrical power to the acoustic sensor, which is embedded within a second location of the vibration-generating object. The acoustic sensor is configured to receive the electrical power, detect acoustic signals, and convert the detected acoustic signals into acoustic data. The kinetic energy harvester may be an electromagnetic harvester that comprises a magnet array and a coil array comprising at least one conductive coil. By inducing a current in the at least one conductive coil through the relative motion between the magnet array and the coil array, the kinetic-energy harvester produces electrical power.