Magnetic Vibration Sensor with Tuning Fork Legs
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Solution Overview
Problem
Existing vibration sensors struggle to detect mechanical vibrations with high sensitivity and clarity, particularly in environments like soil or water, and often produce signals with background noise, limiting their effectiveness in measuring low-amplitude vibrations.
Innovation Solution
A magnetic vibration sensor design featuring two legs with adjustable mounting positions and a coil unit surrounding a permanent magnet, allowing for variable sensitivity and reduced intrinsic noise, utilizing the principle of counter-vibrations to produce induction signals based on the physical properties of the tuning fork mechanism.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If conventional vibration sensors are used, then they can detect vibrations, but the signals are weak and contaminated with background noise
Solution Approach 1:
The patent employs a tuning fork mechanism where two legs vibrate in opposite directions when acted upon by external vibrations. This mechanical vibration principle transforms external vibrations into measurable leg movements, which then induce electrical signals through the magnet-coil interaction, thereby amplifying weak vibration signals while filtering out background noise through the differential measurement approach
Solution Approach 2:
The patent combines multiple functions into a single integrated sensor unit: the tuning fork structure provides mechanical vibration amplification, the permanent magnet attached to one leg creates a magnetic field, and the coil wound around the other leg detects the changing magnetic flux. This merging of mechanical and electrical components in one compact unit achieves both signal amplification and noise reduction simultaneously
2Adaptability or versatility
If the sensor uses fixed leg configuration, then the structure is simple, but the sensitivity cannot be adjusted for different applications
Solution Approach 1:
The patent makes the sensor adaptable by allowing variable mounting positions of the legs. The legs can be mounted at different distances from each other (e.g., 5mm to 5cm spacing) depending on the application requirements. This dynamic configurability enables sensitivity adjustment without requiring multiple different sensor designs, balancing versatility with reasonable structural complexity
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 sensor achieves clear and pure signals with high amplitude, capable of detecting slow vibrations with low amplitude and minimizing background noise, offering improved sensitivity and signal strength across various applications.
Implementation Method 1
A vibration sensor comprises at least one magnet and at least one coil where the vibration sensor furthermore comprises a first leg, where the first leg is designed with a first mounting position and a second mounting position, and a second leg, where the second leg is designed with a first mounting position and a second mounting position, and where a coil unit, designed with at least one coil, is arranged at the first mounting position of the first leg, and where a permanent magnet holder, designed with at least one magnet, is arranged at the first mounting position of the second leg, and the coil unit surrounds the magnet unit so that the magnet unit can move relative to the coil unit and be surrounded by the coil unit
Data Source
AI summary
A vibration sensor having at least one magnet and at least one coil, a first leg having a first and second mounting positions, and a second leg having first and second mounting positions, wherein a coil unit having a coil is arranged at the first mounting position of the first leg, and wherein a permanent magnet holder with a magnet is arranged at the first mounting position of the second leg, and the coil unit surrounds the magnet unit so that the magnet unit can move relative to the coil unit and be surrounded by the coil unit, and wherein the first leg, in the second mounting position, is arranged with a spacing relative to the second mounting position of the second leg, so that the first leg at the first mounting position is arranged spring-like with respect to the second leg at the first mounting position.