Infrared Sensor Multi-Column Scan for Lower Area Detection
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Solution Overview
Problem
Existing infrared detection systems have limited detection range in lower areas due to sensor placement and suffer from image distortion caused by optical systems, leading to noise in thermal images.
Innovation Solution
An infrared detection apparatus with an inclined infrared sensor and a scanning unit that rotates the sensor to cover a broader area, including the lower region, while using a lens with high infrared transmittance and thermistors to minimize heat influence from the IC chip, and performing distortion correction and super-resolution processing to enhance image quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If the infrared sensor is positioned at a height of 1800 mm from the floor with vertically arranged light-receiving elements, then the air conditioning control function is achieved, but the detection range in lower areas is limited
Solution Approach 1:
The patent transitions from a single vertical column arrangement to multiple columns with displaced positions, adding a horizontal dimension to the detection coverage. This multi-column configuration with lateral displacement enables the sensor to cover lower areas that were previously inaccessible from the fixed high mounting position.
2Measurement precision
If a conventional optical system is used for infrared detection, then the basic detection function is achieved, but image distortion occurs causing noise in thermal images
Solution Approach 1:
The patent modifies the optical parameters by using multiple columns with different lateral displacements, which changes the point spread function characteristics for each column. This parameter variation across columns allows for distortion compensation, reducing image noise and improving thermal image accuracy.
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 achieves an increased detection range in lower areas and reduces image distortion, resulting in improved thermal image accuracy and noise reduction.
Implementation Method 1
a lens that allows infrared light to pass therethrough
Implementation Method 2
an infrared sensor that includes infrared detection elements arranged in two or more columns... outputting an output signal indicating a thermal image of the detection range
Data Source
AI summary
A lens allows infrared light to pass therethrough. An infrared sensor includes infrared detection elements arranged in two or more columns. The infrared sensor is rotated around a scan rotation axis that passes through part of the lens to scan a detection range, and outputs an output signal indicating a thermal image of the detection range. At least two infrared detection elements in the infrared sensor are located at positions displaced from each other with respect to the scan rotation axis. Among the infrared detection elements, the number of first infrared detection elements having a smaller half-width of a point spread function in a scan direction than that in the direction of the scan rotation axis is larger than the number of second infrared detection elements having a larger half-width of a point spread function in the scan direction than that in the direction of the scan rotation axis.