Flexible Plate Sensor for Noise-Resistant Signal Detection
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional sensors face challenges in reducing noise interference and foreign object influences in noisy environments, with limited frequency range and poor signal-to-noise ratio.
Innovation Solution
A sensor design featuring a flexible plate and integrated pressure sensing component within a housing, which moves to induce medium pressure changes and concentrates air disturbances, reducing external noise and foreign object interference through a disturbance concentrator and limiter.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional sound sensors are used in noisy environments, then multiple directional microphones are required to reduce noise interference, but the impact of environmental factors such as noise and entrance of foreign objects cannot be effectively eliminated
Solution Approach 1:
The patent employs a flexible plate as the sensing element that can deform in response to pressure changes while maintaining structural integrity. This flexible membrane structure effectively filters out foreign objects and environmental noise while allowing valid pressure signals to pass through, thereby improving reliability without increasing device complexity
Solution Approach 2:
The invention extracts and isolates the pressure sensing function from the housing structure by using a separate flexible plate that can move independently. This separation allows the sensor to respond only to genuine pressure changes while ignoring external disturbances such as foreign object entry and environmental noise
2Measurement precision
If conventional vibration sensors are designed to sense in a narrow frequency range, then large signal output and linearity are maintained, but the signal-to-noise ratio is poor
Solution Approach 1:
The flexible plate is designed with specific elastic properties that allow it to dynamically respond to a broad frequency range of pressure signals. The plate's natural frequency and damping characteristics are optimized to maintain large signal output and linearity while effectively distinguishing valid signals from noise across multiple frequency bands, thereby improving the signal-to-noise ratio
Solution Approach 2:
The patent optimizes the physical parameters of the flexible plate including its thickness, material composition, and mounting configuration to achieve the desired frequency response. By carefully selecting these parameters, the sensor maintains high measurement precision and good signal-to-noise ratio simultaneously across a broader frequency range
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
Enhances sensitivity and reduces noise interference, improving signal quality by effectively isolating the sensor from external factors and expanding the frequency range.
Implementation Method 1
a flexible plate provided in the accommodating room and capable of moving to induce a medium pressure change in the accommodating room
Implementation Method 2
the pressure sensing component performs a pressure detection by collecting the air pressure change around the disturbance concentrator
Data Source
AI summary
A sensor includes a housing having a accommodating room, a flexible plate provided in the accommodating room and moveable to induce a medium pressure change in the accommodating room, and a pressure sensing component for sensing the pressure change. The pressure sensing component and the flexible plate are assembled and moveable together. In the sensor of the present invention, after an external signal to be sensed is transmitted to the sensor, the flexible plate moves to induce air disturbances, and then the pressure sensing component receives a pressure change induced by the air disturbances and performs signal sensing. Compared with the conventional sound sensor, the sensor of the present invention provides no opening communicating with the external environment. Therefore, the impact of foreign objects, noise and other environmental factors on the sensor can be avoided, and the signal generated by the object not to be sensed can be effectively reduced.