Tuned Vibration Sensor for Selective Insect Signal Detection
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Solution Overview
Problem
Existing technologies are inadequate for selectively detecting and reproducing low-frequency vibrational communications of insects in outdoor environments, as they are either too expensive, not immune to disturbances, or not suitable for field use.
Innovation Solution
A magneto-electric vibration sensor system with a tuned transducer and electronic circuitry for selective detection and reproduction of low-frequency insect vibrations, featuring a calibrated mass and sound-absorbing caps to filter out unwanted frequencies, and a microcontroller for interactive communication.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If laser interferometry is used to detect vibrational signals, then measurement precision is improved, but device complexity and cost increase, making it unsuitable for field use
Solution Approach 1:
The patent replaces complex optical detection systems (laser interferometry) with a simplified electromagnetic sensor system consisting of a coil and magnet assembly. This mechanical/electromagnetic substitution maintains detection capability while dramatically reducing device complexity and cost for field deployment
Solution Approach 2:
The invention employs inexpensive electromagnetic sensor components (coils, magnets, diaphragms) that can be easily manufactured and replaced in the field, replacing the need for expensive, fragile optical equipment while maintaining adequate detection performance for agricultural monitoring
2Ease of manufacture
If piezoelectric detectors are used to detect insect vibrations, then ease of manufacture is improved, but reliability deteriorates due to high impedance noise and oxidation in outdoor environments
Solution Approach 1:
The patent substitutes piezoelectric detectors with an electromagnetic induction-based sensor system using coils and magnets. This replacement eliminates the high-impedance noise and oxidation problems inherent in piezoelectric materials while maintaining manufacturing simplicity and outdoor reliability
Solution Approach 2:
The invention changes the detection mechanism from piezoelectric effect to electromagnetic induction, fundamentally altering the physical parameters of the sensor system to achieve better noise immunity and environmental stability while preserving ease of manufacture
3Ease of operation
If vibration sensors are made lightweight for field use, then ease of operation is improved, but measurement precision deteriorates due to inability to detect very low frequencies
Solution Approach 1:
The patent employs a diaphragm-based mechanical vibration system where the diaphragm's physical properties (mass, tension, area) are optimized to resonate at low frequencies. This mechanical resonance approach enables lightweight sensor construction while maintaining sensitivity to very low-frequency insect vibrations that lighter sensors would otherwise miss
4Measurement precision
If sensors are designed for selective detection of insect vibrations, then measurement precision is improved, but device complexity increases due to need for disturbance immunity
Solution Approach 1:
The patent applies local quality by creating a specialized detection zone using the diaphragm-coil-magnet assembly where the magnetic field is concentrated and optimized for detecting vibrations at the diaphragm surface. This localized electromagnetic field configuration provides inherent selectivity for insect vibrations while naturally filtering out distant disturbances without requiring complex electronic filtering systems
Solution Approach 2:
The diaphragm serves as an intermediary element that couples the external vibration environment to the electromagnetic sensor system. It selectively transmits insect vibrations to the coil-magnet assembly while isolating the sensitive electromagnetic components from direct exposure to environmental disturbances, providing passive filtering without adding system 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 system provides a compact, cost-effective, and disturbance-immune solution for detecting insect populations and interacting with them to prevent damage to crops, offering early warning and behavioral interference.
Implementation Method 1
a coil and a magnet assembly, which are reciprocally movable along a vibration axis, being integral with a vibrating diaphragm
Implementation Method 2
a vibrating diaphragm (5) to which a calibrated mass (C) is applied on a symmetry axis
Data Source
Figure 1
Figure 2~3B
Figure 4A
AI summary
A method for preventing infestations by insect pests and a related vibration sensor system are disclosed, comprising a transducer/sensor arranged to be placed in contact with a vibration-transmitting substrate, an electrical control section of said transducer/sensor, and a logic processing section for processing data received from and transmitted to said control section, characterized in that said transducer/sensor comprises a solenoid (S) and a magnet (MA) with a magnetic field linked to said solenoid (S), reciprocally movable along a vibration axis, a vibrating diaphragm (ME) integral with said solenoid (S), forming a loudspeaker configuration, said vibrating diaphragm (ME) being fixed to a housing casing (B) in which said solenoid (S) and magnet (MA) are also accommodated, a calibrated mass (C), applied to said diaphragm (ME), which can be tuned to define a desired operating frequency of said transducer/sensor in the range from 80 Hz to 2000 Hz, and further comprising an base cap (Z) acting as a damper/sound absorber and applied on the side of said diaphragm (ME) where said calibrated mass (C) is applied, said inner cap (Z) being provided with an internal cavity (Z1) in which said calibrated mass (C) is housed, an optional outer cap (F), sound-absorbing and protective against external physical agents, arranged above said base cap (Z), said base cap (Z) and outer cap (F) being configured to shield sound waves outside the range from 80 Hz to 2000 Hz.