Rigid Vibration Plate for Accurate Dog Bark Detection
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Solution Overview
Problem
Existing dog bark detection devices are prone to interference from external sounds, leading to inaccurate bark detection and potential incorrect electric shock bark stopping.
Innovation Solution
A vibration sensor with a rigid vibration plate and a support elastic element, designed to only respond to direct mechanical vibrations, is integrated into a dog bark detection device. This setup shields external noise interference and improves the accuracy of bark detection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If an elastic membrane is used in the vibration sensor to detect sound, then the device can respond to sound vibrations, but it becomes easily interfered by external sound environment and triggers incorrect bark stopping
Solution Approach 1:
The patent changes the physical parameter of the vibration sensing element from an elastic membrane to a rigid plate. This parameter change fundamentally alters the response characteristics: the rigid plate only responds to direct mechanical vibrations (high-frequency, high-amplitude) while ignoring acoustic pressure waves (low-frequency, low-amplitude), thereby resolving the contradiction between sound detection capability and resistance to external sound interference
Solution Approach 2:
The patent applies different material properties to different parts of the system. The rigid plate is specifically designed with high rigidity to be insensitive to acoustic pressure, while the support elastic elements provide the necessary elasticity for mechanical vibration transmission. This local differentiation of material qualities enables selective response to different vibration types
2Measurement precision
If a tuning fork is used to detect dog barking, then the device can identify specific bark frequencies, but it is easily interfered with by external factors causing incorrect judgments
Solution Approach 1:
The patent extracts the frequency selection function from the vibration sensing element itself and relocates it to the signal processing stage. The rigid plate captures all direct mechanical vibrations without frequency discrimination, and the microcontroller subsequently filters and identifies bark-specific frequencies through programmed algorithms, thereby eliminating external interference while maintaining frequency measurement precision
Solution Approach 2:
The patent introduces a digital signal processing intermediary (microcontroller) between the mechanical vibration detection and the bark identification decision. This intermediary filters out external interference signals and selectively processes only those vibrations matching dog bark characteristics, resolving the contradiction between frequency identification accuracy and resistance to external factors
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 solution effectively enhances the accuracy of dog bark detection, reduces incorrect bark stopping, and provides a reliable means to prevent unnecessary electric shock bark stopping.
Implementation Method 1
the upper and lower ends of the support elastic element are elastically abutted between the vibration plate and the back plate, to drive the vibration plate to move along the axial direction of the vibration cavity
Data Source
AI summary
The present invention provides a vibration sensor, comprising a shell, a vibration plate, a back plate and a support elastic element, the shell includes a vibration cavity, which is equipped with a first opening end and a second opening end, and the vibration plate is movably set at the first opening end of the vibration cavity, the back plate is fixedly set at the second opening end of the vibration cavity, and is set at an interval opposite to the vibration plate, the support elastic element is located inside the vibration cavity, and the upper and lower ends of the support elastic element are elastically abutted between the vibration plate and the back plate, to drive the vibration plate to move along the axial direction of the vibration cavity, the vibration plate is made of rigid material, and only direct contact mechanical vibration can cause the vibration plate to vibrate.