Mechanical Vibration IR Detector Resonating Pixel Structure
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing infrared (IR) detectors face challenges such as the need for cryogenic temperatures in quantum detectors and self-heating and ADC complexity in thermal detectors, which result in bulky, costly, and noisy devices with limited flexibility and accuracy.
Innovation Solution
A mechanical vibration-based IR detector using resonating pixel structures that measure IR radiation through mechanical resonance, eliminating the need for cryogenic cooling and ADCs, and allowing for adjustable wavelength sensitivity and high-resolution imaging.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If quantum IR detectors are used to achieve very high performance, then measurement precision is improved, but device complexity and cost increase due to cryogenic cooling requirements
Solution Approach 1:
The patent replaces quantum detectors requiring cryogenic cooling with a mechanical resonance-based detection system. The resonator structure detects IR radiation through mechanical vibrations and resonance frequency shifts, eliminating the need for complex cryogenic cooling systems while maintaining detection capability.
Solution Approach 2:
The patent changes the detection parameter from electrical resistance or voltage (quantum detectors) to mechanical resonance frequency. By measuring frequency shifts in the resonator caused by IR-induced temperature changes, the system achieves high precision without cryogenic requirements.
2Device complexity
If thermal IR detectors (bolometers) are used to eliminate cryogenic cooling, then device complexity is reduced, but measurement precision deteriorates due to self-heating and ADC complexity
Solution Approach 1:
The patent introduces a resonating mechanical structure that converts thermal effects into mechanical vibrations. The resonator's natural frequency shifts in response to temperature changes, providing a more precise measurement mechanism than standard bolometers while avoiding self-heating issues through proper thermal isolation.
Solution Approach 2:
The patent replaces the electrical resistance-based measurement of traditional bolometers with a mechanical resonance frequency measurement. This substitution eliminates the need for complex ADC circuits and reduces self-heating effects, improving precision while maintaining simplicity.
3Adaptability or versatility
If ADC is added to thermal detectors to enable digital processing, then adaptability is improved, but device complexity and noise increase
Solution Approach 1:
The patent replaces the need for ADC conversion by using a resonator whose output is inherently a frequency signal that can be directly processed by digital counters or frequency-to-digital converters. This mechanical-to-frequency conversion eliminates the need for complex analog-to-digital conversion circuits.
Solution Approach 2:
The resonator structure inherently provides a frequency-encoded output signal that is directly suitable for digital processing. The system self-generates a measurable frequency signal from the thermal-mechanical coupling, eliminating the need for additional conversion components.
4Measurement precision
If resonator size is reduced to increase measurement range and accuracy, then measurement precision is improved, but structural stability deteriorates
Solution Approach 1:
The patent uses thin-film or micro-scale resonator structures that maintain structural integrity through careful material selection and geometric design. These thin structures are sufficiently compliant to exhibit measurable resonance frequency shifts while remaining stable through proper anchoring and material properties.
Solution Approach 2:
The patent employs composite material structures for the resonator, combining materials with different thermal and mechanical properties. This allows the structure to be small and sensitive to temperature changes while maintaining structural stability through the synergistic properties of the composite materials.
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
This solution enables precise, energy-efficient, and compact IR detection with increased accuracy and flexibility, capable of measuring small temperature differences and achieving over 100 images per second without the need for cryogenic cooling or ADCs, while maintaining high resolution and dynamic range.
Implementation Method 1
measure incoming IR radiation by means of mechanical resonance of the resonating pixels
Implementation Method 2
the resonance frequencies of the mode shapes of a mechanical structure is also dependent on the temperature
Data Source
Figure 1~6
Figure 7~10
Figure 11~14
AI summary
The invention relates to a vibration based mechanical IR detector having one or more than one resonating pixel structure and an IR imaging method for measuring incoming IR radiation by means of mechanical resonance of the resonating pixels.