Loop-Shaped Fixing Device for Acoustic Emission Sensors
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Solution Overview
Problem
Conventional fixing methods for acoustic emission test sensors, such as adhesive tape and rubber bands, fail to ensure accurate positioning, lead to signal noise, and are inadequate for deformation tests, limiting the effectiveness and accuracy of rock damage testing.
Innovation Solution
A fixing device with a loop-shaped frame, cylinder installation bases, split ring springs, and adjustable installation mechanisms that automatically align sensors to maintain consistent contact with the test piece, reducing signal noise and ensuring accurate positioning and stress consistency during deformation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If adhesive tape is used to fix sensors, then sensors can be held in place, but the pressure increases and may damage the sensors
Solution Approach 1:
The patent introduces a fixing device with a fixing frame and installation bases as an intermediary between the sensor and the sample. This mediator distributes the fixing force uniformly across the sensor, avoiding concentrated pressure from adhesive tape while maintaining reliable attachment. The fixing frame acts as a buffer that transforms point-pressure adhesive bonding into distributed mechanical constraint.
2Reliability
If rubber band is used to fix sensors, then sensors can be held in place, but good contact between sensors and samples cannot be guaranteed
Solution Approach 1:
The patent replaces the elastic mechanical constraint of rubber bands with a rigid fixing frame system that incorporates adjustment mechanisms. This substitution allows for precise positioning of sensors through mechanical adjustment while maintaining reliable fixation, transforming the imprecise elastic constraint into a controllable rigid structure with adjustment capability.
3Ease of manufacture
If conventional fixing methods are used, then sensors can be attached to samples, but accurate positioning of sensors cannot be ensured
Solution Approach 1:
The patent incorporates preliminary positioning features in the fixing device design, including pre-positioned installation bases and alignment mechanisms on the fixing frame. These preliminary actions enable accurate sensor positioning to be achieved before final fixation, ensuring that sensors are correctly positioned relative to the sample geometry and control software requirements while maintaining ease of attachment.
4Ease of manufacture
If conventional fixing methods are used, then sensors can be attached to samples, but signal noise and artifacts are produced
Solution Approach 1:
The fixing device serves as an intermediary that isolates the sensor from direct contact with the sample surface irregularities. The fixing frame and installation bases create a stable mounting platform that reduces mechanical coupling between sensor and sample, thereby minimizing artifacts in the acoustic emission signals while maintaining easy sensor attachment and replacement.
5Adaptability or versatility
If conventional fixing methods are used, then sensors can be attached to samples, but the fixing methods are of limited use with deformation test sensors
Solution Approach 1:
The patent designs the fixing device with dynamic adjustment capabilities, allowing the installation bases to be adjusted along the fixing frame to accommodate different sensor positions and types. The fixing mechanism incorporates adjustable components that can adapt to deformation test sensors while maintaining reliable fixation, transforming a static fixing approach into a dynamic, adjustable system that works with various sensor configurations.
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 device ensures precise sensor alignment, reduces signal noise, extends sensor lifespan, and maintains consistent stress on sensors during deformation, enhancing the accuracy and authenticity of rock damage tests.
Implementation Method 1
a spring which is sleeved on the sliding bar and has one end acting on each installation base and the other end acting on an inner wall of the fixing frame
Data Source
AI summary
A fixing device for acoustic emission test sensors for rock damage testing, the device including: a fixing frame, installation bases operating to accommodate the acoustic emission test sensors, respectively, fixing assemblies operating to fix the acoustic emission test sensors in the installation bases, and installation mechanisms operating to install the installation bases on the fixing frame. The fixing frame is an integrated loop-shaped frame. Each of the installation bases is a cylinder structure which includes: a cavity corresponding to an outer edge of each of the acoustic emission test sensors, and a wall including a gap for leading out wires of each sensor. The installation mechanisms are adapted to automatically and axially adjust positions of the installation bases. The installation mechanisms are four in number. The four installation mechanisms are disposed on a same section plane of the fixing frame and every two installation mechanisms are oppositely disposed.