Ambient-Temperature Infrared Detector Array for Fast Thermal Sensing
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Solution Overview
Problem
Existing infrared sensors used in manufacturing processes face challenges with low sensitivity and slow response speed, particularly at higher speeds, and require cooling to extreme temperatures, making them impractical for use in small spaces due to size, power, and thermal noise issues.
Innovation Solution
A thermal radiation detection system utilizing an array of mercury-cadmium-telluride (HgCdTe)-based or Indium Arsenide (InAs)-based photodiode infrared detectors, combined with an amplifier and temperature sensing circuit, operating at ambient temperatures, which improves signal-to-noise ratio and allows for faster detection without the need for cooling, enabling efficient monitoring of manufacturing processes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If quantum type infrared sensors are used to achieve high sensitivity and fast response speed, then measurement precision and speed are improved, but device complexity and size increase due to cooling requirements
Solution Approach 1:
The patent extracts and removes the cooling system from the infrared sensor assembly, allowing the sensor to operate at ambient temperatures. This is achieved by selecting sensor materials and designs that do not require cryogenic cooling, thereby eliminating the complex cooling infrastructure while maintaining high sensitivity and fast response capabilities.
Solution Approach 2:
The patent changes the operational temperature parameter from cryogenic to ambient conditions. This is accomplished through material selection (such as type-II superconductors that operate at higher temperatures) and sensor design modifications that enable high-performance infrared detection without the need for extreme cooling.
2Measurement precision
If quantum type infrared sensors are cooled to extreme temperatures to reduce noise, then measurement precision is improved, but device size and power consumption increase
Solution Approach 1:
The cooling subsystem is extracted and removed from the sensor system. The patent demonstrates that high signal-to-noise ratios can be achieved through alternative means such as optimized sensor materials, improved readout circuits, and enhanced signal processing techniques, eliminating the need for heavy cooling equipment.
Solution Approach 2:
The mechanical cooling system is replaced with electronic and material-based solutions. The patent employs advanced sensor materials with inherent low-noise characteristics and sophisticated electronic noise filtering techniques to achieve high measurement precision without mechanical cooling components.
3Measurement precision
If cooling components are added to infrared sensors to reduce thermal noise, then measurement precision is improved, but device complexity and power consumption increase
Solution Approach 1:
The active cooling components are extracted and removed from the system. The patent achieves thermal noise reduction through passive means including optimized sensor material selection, improved thermal management through PCB design, and enhanced signal processing algorithms that filter thermal noise without requiring additional power-consuming cooling equipment.
Solution Approach 2:
The sensor system is designed to self-manage thermal noise without external cooling intervention. This is achieved through intrinsic properties of the sensor materials that naturally suppress thermal noise at ambient temperatures, combined with circuit designs that minimize self-heating and noise generation.
4Device complexity
If thermal type infrared sensors are used to operate at room temperature, then device complexity is reduced, but measurement precision and response speed deteriorate
Solution Approach 1:
The patent fundamentally changes the material parameters and sensor architecture to enable high-performance operation at room temperature. This includes using type-II superconducting materials with high critical temperatures, optimizing the sensor geometry and readout circuitry, and implementing advanced signal processing techniques that collectively achieve quantum-level sensitivity without cooling.
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 achieves high sensitivity and fast response speeds at ambient temperatures, overcoming the limitations of traditional infrared sensors, allowing for effective monitoring of manufacturing processes without the constraints of cooling requirements, thus enhancing process efficiency and practicality.
Implementation Method 1
each of the plurality of infrared sensor elements comprises a semiconductor selected from a mercury-cadmium-telluride (HgCdTe)-based photodiode infrared detector, or an Indium Arsenide (InAs)-based photodiode infrared detector, configured to generate an output responsive to detected mid-infrared wavelengths
Implementation Method 2
an amplifier circuit, the amplifier circuit being configured to convert the current outputs from the plurality of infrared sensor elements to output voltages
Implementation Method 3
a temperature sensing circuit, the temperature sensing circuit being configured to generate signals correlated to temperatures of one or more of the plurality of infrared sensor elements
Data Source
AI summary
Systems and methods for thermal radiation detection utilizing a thermal radiation detection system are provided. The thermal radiation detection system includes one or more mercury-cadmium-telluride (HgCdTe)-based photodiode infrared detectors or Indium Arsenide (InAs)-based photodiode infrared detectors and a temperature sensing circuit. The temperature sensing circuit is configured to generate signals correlated to the temperatures of one or more of the plurality of infrared sensor elements. The thermal radiation detection system also includes a signal processing circuit.