Infrared temperature sensing system
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Solution Overview
Problem
Conventional infrared temperature sensing devices struggle with accuracy and cost issues in large public spaces due to interference from atmospheric components and background temperatures, leading to misjudgment and high equipment costs, especially when the conventional infrared temperature sensing device is used in a large and busy environments, and existing devices are prone to errors in measuring the temperature sensing device is used in a large and busy environments, and existing devices are prone to misjudgment due to long sensing distance and mutual interference among multiple targets.
Innovation Solution
The infrared temperature sensing system includes two temperature sensing units, an infrared sensing unit, and a processing module, and a processing module. The two temperature sensing units are integrated in a detection box with a tapered notch to limit environmental interference, and the processing module calculates target temperature values by interpolation using correction weights and deviations, compensating for distance and correcting errors, and the infrared temperature sensing system is capable of correcting the target temperature value by interpolation to increase accuracy and reduce computational burden.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If conventional infrared temperature sensing devices are used in large public spaces, then wide-range temperature screening is achieved, but measurement accuracy deteriorates due to atmospheric absorption and background temperature interference
Solution Approach 1:
The patent introduces reference temperature objects (blackbody radiation sources at known temperatures) as intermediaries between the infrared sensor and the target. These reference objects provide known temperature signals that enable the system to calibrate and compensate for atmospheric absorption and background interference, thereby maintaining measurement accuracy across large sensing areas
Solution Approach 2:
The system changes the temperature parameter of the reference objects (using different temperature points) to create a calibration curve. By measuring infrared radiation from reference objects at multiple known temperatures, the system establishes a relationship between radiation intensity and temperature, which is then used to correct measurements of actual targets, compensating for environmental factors
2Measurement precision
If advanced medical thermographs with high-specification sensing elements are used, then temperature measurement accuracy is improved to ±0.5° C., but device cost and complexity increase significantly
Solution Approach 1:
Instead of using expensive medical-grade infrared sensors, the patent employs a conventional infrared sensor combined with reference temperature objects that copy the radiation characteristics of human bodies. The reference objects serve as substitutes that allow the inexpensive sensor to achieve medical-grade accuracy through calibration
Solution Approach 2:
The system replaces expensive, fragile high-specification sensing elements with a combination of a cheap infrared sensor and simple reference temperature objects. This substitution dramatically reduces device cost while maintaining measurement accuracy through the calibration methodology
3Length of stationary object
If conventional infrared sensing is used at long sensing distances, then wide coverage is achieved, but measurement accuracy deteriorates due to mutual interference among multiple targets
Solution Approach 1:
Reference temperature objects are placed at various distances within the sensing field to establish a calibration model that accounts for distance-dependent atmospheric absorption. This intermediary approach allows the system to compensate for signal attenuation and target interference effects that increase with sensing distance
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 infrared temperature sensing system enhances accuracy and reduces costs by correcting the target temperature, and the infrared temperature sensing system is capable of correcting the target temperature value by interpolation to increase accuracy and reduce computational burden.
Implementation Method 1
an infrared thermograph, which is used to collect infrared radiation emitted from the surface of a target and having an energy that is proportional to temperature
Implementation Method 2
collect infrared radiation emitted from the surface of a target and having an energy that is proportional to temperature
Implementation Method 3
infrared radiation will be absorbed by water, carbon dioxide, and other components in the atmosphere during propagation, which causes a reduction in the energy converted into the electric signal
Data Source
AI summary
An infrared temperature sensing system is provided to solve the problems of high cost and measurement errors of conventional infrared temperature sensing device. The infrared temperature sensing system includes two temperature sensing units, an infrared sensing unit, and a processing module. The two temperature sensing units measure a reference temperature and a reference room temperature, respectively. The infrared sensing unit detects the two temperature sensing units and acquires a first temperature measurement value corresponding to the reference temperature and a second temperature measurement value corresponding to the reference room temperature. The infrared sensing unit further detects a target to be measured and acquires a target temperature measurement value. The processing module calculates a target temperature value based on the reference temperature, the reference room temperature, the first and the second temperature measurement values, and the target temperature measurement value.