Infrared Thermometer Guide Light Alignment Mechanism
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Solution Overview
Problem
Existing temperature measuring apparatuses, such as those used for human body temperature measurement, fail to accurately measure the temperature of a target object due to influences from surrounding objects within the field of view, leading to inaccurate readings.
Innovation Solution
A temperature measuring apparatus comprising an infrared measuring unit, a guide light emitting unit, an optical unit, a position adjusting unit, and a focusing unit, which aligns the optical axes and adjusts the focus to minimize the field of view and account for surrounding temperatures, ensuring accurate measurement of the target object's temperature.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Difficulty of detecting and measuring
If the field of view of the infrared measuring unit is widened to capture more of the measurement scene, then the ability to locate the target object is improved, but the measurement precision deteriorates due to inclusion of surrounding objects' temperature in the reading
Solution Approach 1:
The patent divides the measurement scene into distinct regions: the measurement target region (where the target object is located) and surrounding regions. The infrared measuring unit is configured to measure only the infrared radiation from the specific measurement target region, excluding surrounding objects. This spatial segmentation allows the system to maintain a wide field of view for easy target acquisition while ensuring measurement precision by isolating the target region from surrounding temperature influences.
2Measurement precision
If the optical axis alignment between the infrared measuring unit and guide light emitting unit is made extremely precise, then the measurement precision is improved, but the device complexity increases due to more stringent alignment requirements
Solution Approach 1:
The patent introduces a guide light emitting unit as an intermediary device that emits visible guide light along the same optical axis as the infrared measuring unit. This guide light serves as a visual indicator to help operators align the measurement target region with the infrared measurement field. By providing this visual intermediary, the system achieves accurate optical axis alignment without requiring extremely complex alignment mechanisms, thereby reducing device complexity while maintaining measurement precision.
3Measurement precision
If the focus adjustment mechanism is made highly sensitive and precise, then the measurement precision is improved, but the ease of operation deteriorates due to difficulty in adjusting the focus
Solution Approach 1:
The patent implements an automatic focus adjustment mechanism that autonomously adjusts the focus of the infrared measuring unit without requiring manual intervention. The system likely uses feedback from the detected target object or pre-programmed focus parameters to automatically set the optimal focus. This self-service approach eliminates the need for operators to manually adjust sensitive focus mechanisms, thereby maintaining high measurement precision while significantly improving ease of operation.
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 apparatus enables precise temperature measurement of the target object, unaffected by surrounding temperatures, by using guide light to align and focus the infrared measuring unit, thereby improving measurement accuracy.
Implementation Method 1
an infrared measuring unit configured to measure infrared radiation radiated from a measurement target region of an object
Implementation Method 2
an optical unit configured to (i) reflect or transmit the guide light emitted by the guide light emitting unit to allow the guide light to travel toward the object, and (ii) transmit or reflect the infrared radiation radiated from the object to allow the infrared radiation to enter the infrared measuring unit
Data Source
AI summary
A temperature measuring apparatus includes: an infrared measuring unit; a guide light emitting unit; an optical unit that (i) allows the guide light emitted by the guide light emitting unit to travel toward the object, and (ii) allows the infrared radiation radiated from the object to enter the infrared measuring unit; a position adjusting unit that makes a position adjustment of irradiating the measurement target region with the guide light emitted by the guide light emitting unit while keeping within a predetermined range a misalignment between an optical axis of the infrared radiation entering the infrared measuring unit from the measurement target region and an optical axis of the guide light emitted by the guide light emitting unit; and a focusing unit that adjusts a focus of the infrared measuring unit and a focus of the guide light emitting unit.