Non-Contact Body Temperature Measurement Using Wind Compensation
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Solution Overview
Problem
Contact-type thermometers for livestock body temperature measurement are labor-intensive and prone to inaccuracies due to environmental factors and subject movement, making long-term monitoring impractical for disease assessment.
Innovation Solution
A non-contact body temperature measurement device using a thermal imager, an anemometer, and a processing unit to capture and process thermal images, removing frames affected by wind speed and body movement, and applying a temperature difference threshold to improve measurement accuracy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If contact-type thermometer is used for body temperature measurement, then measurement can be obtained, but it is labor-intensive and livestock may feel uncomfortable and nervous
Solution Approach 1:
The patent replaces the mechanical contact-type thermometer with a non-contact thermal imaging system. The thermal imager captures thermal images of the livestock without physical contact, and the processing unit automatically processes these images to determine body temperature, thereby eliminating the need for manual rectal temperature measurement and reducing labor intensity while maintaining measurement accuracy.
2Measurement precision
If contact-type thermometer is used for long-term monitoring, then body temperature can be tracked, but it is impracticable to assess disease state
Solution Approach 1:
The patent replaces the impractical long-term contact monitoring with a non-contact thermal imaging system that can continuously capture thermal images over extended periods. The processing unit automatically processes these images to track body temperature variations, enabling long-term disease state assessment without the practical limitations of contact-type thermometers.
3Ease of operation
If thermal images are captured for non-contact temperature measurement, then labor is reduced, but environmental factors and body movement affect measurement accuracy
Solution Approach 1:
The patent employs feedback mechanisms where the processing unit analyzes thermal images for signs of environmental interference (such as wind effects) and body movement. Based on this analysis, the system selectively processes or discards affected frames, and applies corrections to maintain measurement accuracy. This feedback loop ensures that non-contact measurement convenience does not compromise temperature measurement precision.
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 device significantly reduces temperature errors by eliminating wind and movement effects, providing accurate non-contact body temperature measurements closer to the subject's real core temperature.
Implementation Method 1
a thermal imager (110) used to capture a plurality of thermal images (IRT) each including a plurality of pixels
Implementation Method 2
an anemometer (120) used to measure a wind speed and output a wind speed signal (WS)
Data Source
AI summary
A non-contact body temperature measurement device includes a thermal imager, an anemometer and a processing unit. The thermal imager is provided to capture thermal images. The anemometer is provided to measure wind speed and output a wind speed signal. The processing unit is provided to process the thermal images according to the wind speed signal and remove the thermal image showing great variation in temperature between two consecutive frames. Consequently, an accurate body temperature can be measured through the processed thermal images.