Sapphire Thermal-Acoustic-Vibration Sensor for Extreme Environments
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Solution Overview
Problem
Current sensors fail to accurately and stably measure thermal, acoustic, and vibration parameters in high-temperature and high-pressure environments due to limitations in materials and design, leading to equipment instability and potential failure.
Innovation Solution
A thermal-acoustic-vibration three-parameter integrated in-situ sensor system with a high-temperature-resistant and high-pressure-resistant structure, comprising a heat detection device, a sound detection device, and a vibration detection device, all made of sapphire materials, utilizing Bragg gratings and Fabry-Perot cavities with high-reflection volume gratings and vibrating membranes to detect temperature, sound, and vibration through optical signals.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If traditional silicon-based sensing devices are used, then the device structure can be maintained, but the device loses efficacy at high temperature (greater than 125°C)
Solution Approach 1:
The patent changes the material parameter from traditional silicon-based materials to sapphire materials, which have fundamentally different thermal stability characteristics. This material substitution enables the sensor to maintain structural integrity and sensing functionality at temperatures exceeding 600°C, directly resolving the temperature resistance limitation of conventional sensors.
Solution Approach 2:
The patent employs composite material structures combining sapphire with specialized packaging materials and optical components. This composite approach creates a sensor system that leverages the high-temperature stability of sapphire while integrating functional elements for multi-parameter detection, achieving reliable operation in extreme thermal environments.
2Measurement precision
If multiple separate sensors are used to test different parameters, then comprehensive parameter testing can be achieved, but space synchronous testing cannot be achieved and the overall sensor is large in size
Solution Approach 1:
The patent merges heat detection, sound detection, and vibration detection functions into a single integrated sensor device. By combining multiple sensing elements (including optical fibers with Bragg gratings and Fabry-Perot cavities) within one compact structure, the sensor achieves simultaneous multi-parameter measurement capabilities while maintaining a small form factor suitable for narrow spaces.
Solution Approach 2:
The sensor is designed as a universal multi-functional device that can simultaneously detect temperature, acoustic pressure, and vibration parameters. This multi-functionality is achieved through integrated optical sensing elements that respond to different physical stimuli, allowing a single device to replace multiple separate sensors and enable space-synchronized testing.
3Temperature
If high-temperature-resistant sensing devices are used, then temperature testing can be achieved, but the devices are only limited to testing of a single parameter (such as pressure)
Solution Approach 1:
The patent combines multiple sensing functionalities (temperature, pressure, vibration) within a single high-temperature-resistant sensor structure. By integrating different sensing mechanisms including optical fibers with Bragg gratings for temperature and Fabry-Perot cavities for acoustic and vibration detection, the device achieves multi-parameter testing capability while maintaining high-temperature resistance.
Solution Approach 2:
The sensor is designed as a universal device that can simultaneously measure multiple parameters (temperature, acoustic pressure, vibration) in high-temperature environments. This universality is achieved through the integration of multiple optical sensing elements that respond to different physical quantities, allowing a single device to perform comprehensive parameter testing that was previously requiring multiple separate sensors.
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
Enables accurate and stable simultaneous measurement of thermal, acoustic, and vibration parameters in extreme environments, ensuring reliable operation and reducing equipment failure, with a compact design suitable for narrow spaces and complex conditions.
Implementation Method 1
the heat detection device is a second optical fiber, a Bragg grating is arranged inside the second optical fiber
Implementation Method 2
the sound detection device comprises a main body structure, a first volume grating, a second volume grating and a first optical fiber, a hole is formed in the interior of the main body structure
Implementation Method 3
the first volume grating and the second volume grating are arranged on two opposite surfaces of the cuboid hole respectively
Implementation Method 4
the vibration detection device comprises a third volume grating, a fourth volume grating, a cavity structure, a third optical fiber and a vibrating membrane
Implementation Method 5
the cavity structure is a hollow cavity structure, the cavity structure is made of a semi-reflecting and semi-transparent material
Data Source
AI summary
The present disclosure relates to a thermal-acoustic-vibration three-parameter integrated in-situ sensor and system with a high-temperature-resistant and high-pressure-resistant structure. The provided thermal-acoustic-vibration three-parameter integrated in-situ sensor with a high-temperature-resistant and high-pressure-resistant structure comprises a heat detection device, a sound detection device and a vibration detection device; and the sound detection device and the vibration detection device are distributed on two sides of the heat detection device. When heat, sound and vibration need to be detected, only spectra of light signals emitted by the heat detection device, the sound detection device and the vibration detection device need to be obtained, and heat information, sound information and vibration information to be detected are obtained through the corresponding relation between the spectra of the optical signals emitted by the heat detection device, the sound detection device and the vibration detection device and heat information, sound information and vibration information to be detected.