Protective Body for Structure-Borne Sound Sensor
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Solution Overview
Problem
Existing devices for detecting structure-borne sound signals triggered by damage on vehicle components face challenges in protecting sensors from environmental impacts and achieving non-destructive installation, leading to dampened signal transmission and difficulty in detecting low-intensity signals.
Innovation Solution
A device with a protective body that houses the structure-borne sound sensor and provides a conducting connection to the component, enhancing signal detection through leverage effects and allowing for easy installation and reuse, using a piezoelectric film sensor bonded to the protective body and clamping device for improved signal intensity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the structure-borne sound sensor is directly bonded to the component to be monitored, then good transmission of structure-borne sound is achieved, but the sensor cannot be easily removed and requires shielding that dampens signal transmission
Solution Approach 1:
The patent introduces a protective body as an intermediary element between the structure-borne sound sensor and the component to be monitored. The sensor is bonded to the protective body, which in turn is connected to the component. This mediator allows the sensor to be easily removed from the protective body while maintaining good structure-borne sound transmission through the protective body to the sensor.
2Object-affected harmful factors
If the structure-borne sound sensor is placed in a housing for protection, then the sensor is protected against environmental impacts, but the structure-borne sound signal transmission is dampened
Solution Approach 1:
The protective body is designed as a thin-walled structure that provides environmental protection while maintaining good structure-borne sound transmission. The thin walls allow vibration and sound signals to pass through effectively while still protecting the sensor and evaluation electronics from environmental impacts such as moisture and physical damage.
3Object-affected harmful factors
If shielding is applied to protect the evaluation electronics, then environmental protection is improved, but structure-borne sound signal detection of low intensity becomes more difficult
Solution Approach 1:
The protective body employs thin-walled construction that provides necessary environmental shielding for the evaluation electronics while allowing structure-borne sound signals, even low-intensity ones, to transmit through the walls to the sensor with sufficient fidelity for accurate detection.
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 solution enables enhanced detection of structure-borne sound signals with increased signal intensity and ease of installation and reuse, addressing the limitations of direct bonding and environmental protection in existing technologies.
Implementation Method 1
piezoelectric films are used as structure-borne sound sensors
Implementation Method 2
the protective body comprises a structure-borne sound conducting connection to the component to be monitored
Data Source
AI summary
A device for detecting a structure-borne sound signal, in particular for detecting a structure-borne sound signal caused by an event of damage on a component to be monitored, having at least one structure-borne sound sensor, at least one signal-conducting connection of the structure-borne sound sensor to an evaluation device, and a protective body. The structure-borne sound sensor has a structure-borne sound-conducting connection to the protective body and the protective body has a structure-borne sound-conducting connection to the component to be monitored.