Temperature Screening With Simultaneous Heat-Source Referencing
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Solution Overview
Problem
Existing non-contact thermometers are prone to errors due to alignment dependence and lack the ability to accurately measure a separate heat source, making them unreliable for temperature screening applications.
Innovation Solution
A temperature screening system that includes a temperature sensor and a heat source within its field of view, allowing simultaneous temperature measurement of both the subject and the heat source, with the heat source being controlled to a desired reference temperature for accurate comparison.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If existing non-contact thermometers are used to measure subject temperature, then temperature screening can be performed without contact, but measurement accuracy deteriorates due to alignment dependence
Solution Approach 1:
The patent introduces a heat source as an intermediary reference object that emits thermal radiation. The temperature sensor measures the radiation from both the subject and the heat source, using the known temperature of the heat source to calibrate and determine the subject's temperature, thereby eliminating alignment sensitivity while maintaining non-contact measurement capability
Solution Approach 2:
The heat source creates a controlled thermal reference copy that replicates the thermal radiation characteristics needed for accurate measurement. By measuring the ratio of radiation from the subject to the known radiation from the heat source, the system determines temperature without requiring direct alignment with the subject's body surface
2Device complexity
If existing non-contact thermometers measure only subject temperature, then device complexity is reduced, but reliability deteriorates due to inability to measure separate heat source temperature
Solution Approach 1:
The temperature sensor is designed to measure thermal radiation from multiple sources (both the subject and the heat source) simultaneously. This multi-functional capability allows the single sensor to perform both reference temperature measurement and subject temperature measurement, improving reliability without adding complex multi-sensor systems
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
Provides highly reliable temperature screening by comparing the subject's temperature to a accurately determined heat source temperature, ensuring precise entry criteria without the need for direct contact.
Implementation Method 1
temperature sensors configured to simultaneously determine a temperature of the subject and a temperature of the heat source
Data Source
AI summary
A screening method includes controlling a heat source of a screening device to reach a selected temperature, determining a location of a subject, and determining that the location is a desired distance from the screening device. The method also includes based at least in part on determining that the location is the desired distance from the screening device, simultaneously determining a temperature of the subject and a temperature of the heat source using a temperature sensor of the screening device.