Charge Type Vibration Sensor with Temperature Compensation
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Solution Overview
Problem
Existing temperature-vibration composite sensors are inadequate for high-temperature environments above 600°C, as they suffer from reduced sensitivity, inaccurate measurements, and challenges with high-temperature solder joints, making it difficult to monitor the health of aero-engine components effectively.
Innovation Solution
An apparatus and method incorporating a charge type vibration sensing module with temperature compensation and a temperature/vibration coplanarly-integrated wireless SAW sensing module, both connected to a processing module, which implements a full-range temperature-vibration composite parameter compensation decoupling method to accurately monitor temperature and vibration parameters in high-temperature environments.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If a high-temperature vibration sensor uses piezoelectric effect to convert vibration signal into electrical signal, then the sensor achieves high operating temperature capability and self power generating, but the sensitivity of the sensor changes with temperature increase, affecting measurement accuracy
Solution Approach 1:
The sensor system is divided into two independent modules: a charge type vibration sensing module for vibration detection and a temperature sensing module for temperature detection. Each module operates independently with its own sensing elements, allowing the vibration sensor to maintain its piezoelectric effect while the temperature sensor monitors and compensates for temperature-induced sensitivity changes.
Solution Approach 2:
The temperature sensing module continuously monitors the temperature environment and provides feedback to a processing module. This feedback is used to compensate for temperature-induced changes in the vibration sensor's sensitivity, ensuring accurate vibration measurements across a wide temperature range including high-temperature environments above 600°C.
2Adaptability or versatility
If traditional temperature-vibration composite sensors are used in high-temperature environments above 600°C, then temperature and vibration parameters can be measured, but the sensors suffer from reduced sensitivity, inaccurate measurements, and challenges with high-temperature solder joints
Solution Approach 1:
A processing module acts as an intermediary between the sensing modules and the output system. This module receives signals from both the vibration and temperature sensing modules, performs compensation calculations based on temperature data, and outputs corrected measurement results. The intermediary processing module enables accurate measurements in high-temperature environments by compensating for environmental effects.
Solution Approach 2:
The sensor system employs composite material structures, including high-temperature resistant materials for the sensor housing and mounting structures. The combination of piezoelectric materials for vibration sensing and temperature-stable materials for structural components enables the sensor to maintain performance in high-temperature environments above 600°C without suffering from solder joint failures or material degradation.
3Adaptability or versatility
If a charge type vibration sensor with temperature compensation is used, then temperature and vibration can be measured simultaneously, but the sensor volume increases and high-temperature solder joint interconnection becomes difficult
Solution Approach 1:
The temperature sensing module is integrated within the same housing as the vibration sensing module, with the temperature sensor elements positioned around or adjacent to the piezoelectric vibration sensing elements. This nested arrangement allows both sensing functions to coexist in a compact configuration, minimizing overall sensor volume while enabling simultaneous temperature and vibration measurement capabilities.
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 real-time, in-situ simultaneous measurement of temperature and mechanical parameters, improving measurement accuracy and stability in high-temperature environments, overcoming issues of low operating temperature, large volume, and multi-parameter interference.
Implementation Method 1
A charge type vibration sensor having a temperature compensation function includes a supporting base, a plurality of first mass blocks, and a plurality of piezoelectric substrates
Implementation Method 2
the charge type vibration sensor having a temperature compensation function includes a supporting base, a plurality of first mass blocks, and a plurality of piezoelectric substrates; the thermocouples are arranged on the first mass blocks
Implementation Method 3
a temperature/vibration coplanarly-integrated wireless surface acoustic wave (SAW) sensing module
Data Source
AI summary
An apparatus and method for real-time in-situ simultaneous measurement of temperature and mechanical parameters can include a charge type vibration sensing module having a temperature compensation function and a temperature/vibration coplanarly-integrated wireless surface acoustic wave (SAW) sensing module are controlled by a processing module in which a full-range temperature-vibration composite parameter compensation decoupling method is implanted, which can detect a vibration signal in a variable temperature environment. Moreover, temperature and vibration multi-parameter testing of static components in a high-temperature, narrow and closed environment can be implemented by arranging the charge type vibration sensing module having a temperature compensation function, and the temperature/vibration coplanarly-integrated wireless SAW sensing module implements health monitoring of moving components in a high-temperature and high-rotation environment.