Contact Vibration Photon Sensor With Doppler Mirror And Spring Cantilever
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Solution Overview
Problem
Existing optical vibration sensors face limitations such as bandwidth constraints, high power consumption, sensitivity to environmental factors, and speckle noise, particularly in all-optical networks, with intensity-modulated and laser Doppler technologies exhibiting accuracy and signal strength issues.
Innovation Solution
A contact-type vibration photon sensor utilizing the Doppler effect, featuring a silicon-based structure with a mirror body connected by spring-shaped cantilever beams and a gold-plated reflector, which measures vibrations through frequency shifts in reflected light without requiring precise optical path alignment and minimizing speckle noise.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If intensity-modulated optical fiber vibration sensor is used, then structure is simple and cost is low, but detection accuracy is affected by light source fluctuation and optical path environment
Solution Approach 1:
The patent replaces the intensity-modulated optical detection system with a laser Doppler vibration measurement system. Instead of measuring light intensity changes that are sensitive to optical path fluctuations, the system uses laser Doppler effect to measure frequency shifts in reflected light caused by vibrations. This substitution of measurement principle eliminates sensitivity to optical path environment while maintaining reasonable structural complexity through integrated optical components.
2Reliability
If wavelength-modulated optical fiber vibration sensor with fiber Bragg grating is used, then anti-electromagnetic interference and long-distance transmission are achieved, but system measurement accuracy is constrained by spatial resolution and detection signal is weak
Solution Approach 1:
The patent changes the measurement parameter from wavelength modulation (constrained by spatial resolution) to frequency modulation via Doppler effect. By measuring frequency shifts in the reflected laser light caused by vibrations, the system achieves higher measurement accuracy without being constrained by the spatial resolution limitations of fiber Bragg gratings. The spring-shaped cantilever beam also amplifies vibration displacement, further enhancing detection sensitivity.
3Measurement precision
If laser Doppler vibration measurement technology is used, then high accuracy and large dynamic range are achieved, but speckle noise affects measurement and optical path is exposed to external environment
Solution Approach 1:
The patent introduces a mirror body as an intermediary between the laser source and the object being measured. The mirror reflects laser light onto the target surface and collects the reflected light, creating a controlled optical path that is shielded from external environmental interference. This intermediary structure eliminates speckle noise by providing a stable reference reflection surface while maintaining the high accuracy advantages of laser Doppler measurement.
4Measurement precision
If laser Doppler vibration measurement technology is used, then high accuracy is achieved, but difficulty in measuring objects insensitive to laser reflection occurs
Solution Approach 1:
The patent extracts the light reflection function from the object being measured and transfers it to a separate mirror body. The mirror can be positioned close to the target surface to reflect laser light even when the target itself is insensitive to laser reflection. This separation allows the measurement system to maintain high accuracy for objects that would otherwise be difficult to measure with laser Doppler technology.
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 higher accuracy and sensitivity by eliminating speckle noise and enhancing detection signals, reducing reliance on optical path stability and signal-to-noise ratio, while maintaining structural integrity and sensitivity.
Implementation Method 1
a contact-type vibration photon sensor using the Doppler effect
Implementation Method 2
a mirror layer arranged on the top of the mirror body
Data Source
AI summary
The present application relates to a contact-type vibration photon sensor using the Doppler effect and a manufacturing method therefor. A contact-type vibration photon sensor using the Doppler effect includes an outer packaging layer (9), and the outer packaging layer (9) further includes: a silicon-based material (1) and a mirror body (2); the silicon-based material (1) includes side walls (10) and a cavity (11) surrounded by the side walls (10) with a top opening; and the mirror body (2) is arranged inside the cavity (11), a mirror layer (21) is arranged on the top of the mirror body (2), the side surface of the mirror body (2) is connected with the side walls (10) through a cantilever beam (22), and the cantilever beam (22) is spring-shaped. The contact-type vibration photon sensor provided by the present application utilizes the Doppler effect to provide accurate precision, and uses a spring-shaped cantilever beam, thereby increasing the amplitude of the mirror body (2), and improving the sensitivity of the sensor when sensing vibration.