Remote Ultrasonic Vibration Sensing via Phase Shift Analysis
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current ultrasonic vibration sensing methods are costly and require on-site calibration, with high-frequency transducers being sensitive to heat and vibration, limiting their deployment and accuracy in monitoring industrial motors and machines.
Innovation Solution
A remote ultrasonic vibration sensing system using low-cost, low-power ultrasonic transducers that employ a continuous phase-based approach to measure vibration frequencies up to 800 Hz, allowing for non-contact monitoring and reducing heat exposure through subNyquist sampling and phase shift analysis.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If high-frequency ultrasonic transducers are fixed to the vibrating surface, then measurement precision is improved, but device complexity and cost increase
Solution Approach 1:
The patent replaces contact-based mechanical transducers with an acoustic wave-based remote sensing system. Ultrasonic waves are transmitted through the air medium to the vibrating surface and reflected back to the sensor, eliminating the need for physical attachment and reducing system complexity while maintaining measurement precision
Solution Approach 2:
The patent introduces air as an intermediary medium to transmit ultrasonic waves between the sensor and the vibrating surface. This allows remote sensing without direct contact, simplifying the device deployment while preserving measurement accuracy through phase shift analysis of the reflected waves
2Measurement precision
If high-frequency ultrasonic transducers are used, then measurement precision is improved, but the transducer becomes sensitive to heat and vibration
Solution Approach 1:
The patent extracts the transducer from the harsh thermal and vibrational environment by implementing remote sensing. The sensor remains stationary in a controlled environment while ultrasonic waves carry measurement information through air, eliminating heat conduction issues and vibration interference that plague contact-based systems
Solution Approach 2:
Air serves as an intermediary that transmits ultrasonic waves without conducting heat or transmitting mechanical vibration to the sensor. This medium allows the sensor to remain isolated from harmful thermal and vibrational factors while still capturing vibration information from the distant surface through acoustic phase shifts
3Measurement precision
If on-site calibration is performed, then measurement precision is improved, but loss of time increases
Solution Approach 1:
The patent performs calibration in advance during manufacturing or initial setup, storing calibration parameters in the device memory. This preliminary calibration eliminates the need for time-consuming on-site calibration procedures while maintaining measurement precision through pre-determined sensitivity factors and reference measurements
4Measurement precision
If contact-based transducers are used, then measurement precision is improved, but ease of operation decreases due to deployment constraints
Solution Approach 1:
The patent replaces mechanical contact attachment with acoustic wave transmission through air. This allows the sensor to be deployed remotely without requiring surface preparation, mounting hardware, or physical attachment, dramatically improving ease of deployment while maintaining measurement precision through non-contact phase shift measurement
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 cost-effective, long-term monitoring of industrial motors with improved sensitivity and reduced maintenance costs, capable of resolving displacements as low as 0.5 microns, while minimizing exposure to heat and vibration, and allowing for deployment in difficult-to-reach locations.
Implementation Method 1
an ultrasonic transducer to transmit a signal towards a vibrating surface and a receiver to receive a reflected signal from the vibrating surface
Implementation Method 2
employ a continuous phase-based approach to measure vibration frequencies
Data Source
AI summary
Mechanical vibration may be sensed by a remotely located ultrasonic sensor. An ultrasonic wave may be transmitted from a transmitter to a vibrating surface, in which the transmitter is separated from the vibrating surface by a distance. A reflected portion of the ultrasonic wave that is reflected from the vibrating surface may be received by a receiver that is also separated from the vibrating surface by a distance. A measure of phase shift amplitude in the reflected portion of the ultrasonic wave may be determined and converted into an amplitude of a vibration of the vibrating surface.