Infrared Thermometer Array Field of View Validation
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Solution Overview
Problem
Infrared thermometers often provide inaccurate temperature measurements due to factors such as non-uniform object temperatures, mis-aiming, or incomplete filling of the detector's field of view, which can result in background radiation interference and measurement errors.
Innovation Solution
A computer-controlled infrared thermometer system with a sensor array that analyzes output signals from individual detector elements to determine if the object fills the field of view, providing notifications for adjustments to ensure accurate measurements, and using a quality control mechanism to calculate and display accurate temperature readings based on consistent signal variations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If the infrared thermometer measures temperature without contact, then measurement speed and convenience are improved, but measurement accuracy deteriorates due to factors like non-uniform object temperatures, mis-aiming, and incomplete field of view filling
Solution Approach 1:
The patent divides the detector into multiple detector elements arranged in an array, with each element independently measuring infrared radiation from different portions of the object. This segmentation allows the system to analyze temperature uniformity across the field of view and identify measurement errors caused by mis-aiming or incomplete object coverage, thereby improving accuracy while maintaining non-contact measurement speed
Solution Approach 2:
The system provides real-time feedback to the user by comparing measurements from multiple detector elements. When temperature variations exceed a predetermined threshold, the system notifies the user of potential measurement errors and prompts for repositioning or re-aiming, enabling corrective action to achieve accurate measurements without sacrificing measurement speed
2Ease of operation
If the object does not fill the detector's field of view, then ease of operation is improved, but measurement accuracy deteriorates due to background radiation interference
Solution Approach 1:
By segmenting the detector into multiple elements, the system can determine whether the object fills the field of view by analyzing the distribution of temperature readings across elements. This allows automatic detection of incomplete object coverage without requiring complex user intervention, maintaining ease of operation while improving accuracy
Solution Approach 2:
The system provides feedback to the user when the object does not sufficiently fill the field of view, based on analysis of detector element readings. This feedback mechanism guides users to properly position the object, improving measurement accuracy while keeping the operation simple and intuitive
3Measurement precision
If multiple detector elements are used to improve measurement accuracy, then measurement precision is improved, but device complexity increases
Solution Approach 1:
The patent uses multiple detector elements arranged in an array to improve measurement accuracy by detecting temperature uniformity and identifying measurement errors. While this increases device complexity, the segmented approach enables sophisticated analysis of the measurement scene that cannot be achieved with a single detector element
Solution Approach 2:
The array of detector elements serves multiple functions: measuring temperature, detecting object presence in field of view, identifying mis-aiming, and providing feedback guidance. This multi-functionality justifies the increased device complexity by delivering comprehensive measurement capabilities and user guidance in a single integrated system
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 ensures accurate temperature measurements by ensuring the object fills the detector's field of view, reducing measurement errors caused by background radiation and non-uniform temperatures, and providing user notifications for adjustments to improve measurement accuracy.
Implementation Method 1
the infrared thermometer uses an infrared detector array where each detector element in the array is configured to provide a temperature measurement related to the thermal energy captured by the respective area of that detector
Implementation Method 2
Infrared thermometers determine the temperature of an object by measuring the infrared radiation emitted by the object
Data Source
AI summary
A system and method for determining whether a temperature measurement made with an infrared thermometer is accurate is disclosed. An infrared sensor array is used to detect infrared radiation from a target object. By analyzing the relative values of output signals from the individual sensor elements, a determination can be made whether radiation from the target object sufficiently fills the field of view of the detecting element of the instrument. A temperature measurement is considered accurate if this criteria is met.