Detection Device with Sequential Multicolor Illumination for Culture Media
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Solution Overview
Problem
Existing detection devices struggle to accurately distinguish colors in culture media due to overlapping intermediate detection intensities between red, green, and blue wavelength bands, making it difficult to enhance color distinction accuracy.
Innovation Solution
A detection device with multiple light sources emitting different colors and a two-dimensional optical sensor array, where light sources are turned on sequentially to perform detection, allowing for accurate color differentiation based on spectral characteristics.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If RGB optical filters are used to detect color components, then the detection process is simplified, but color distinction accuracy deteriorates due to overlapping intermediate detection intensities between wavelength bands
Solution Approach 1:
The patent segments the detection process by using multiple independent light sources emitting at different wavelengths instead of using white light with optical filters. Each light source targets a specific wavelength band, dividing the detection into separate spectral segments that do not overlap, thereby eliminating the intermediate intensity overlap problem while maintaining detection simplicity
Solution Approach 2:
The patent changes the parameter of light wavelength by using multiple discrete wavelength sources (e.g., blue, green, red LEDs) instead of continuous white light. This parameter change allows selective illumination at specific wavelengths, avoiding the intermediate wavelength overlap that occurs with broadband white light and RGB filters, thus improving color distinction accuracy
2Measurement precision
If multiple light sources are used to improve color distinction accuracy, then detection time increases due to sequential activation requirements
Solution Approach 1:
The patent employs periodic action by sequentially activating multiple light sources in a cyclic manner. Each light source is turned on for a brief period to capture its corresponding wavelength band, then turned off while the next light source activates. This periodic sequential operation enables complete spectral detection while minimizing total detection time through efficient time-multiplexed measurement
Solution Approach 2:
The system performs self-service by automatically switching between multiple light sources based on detection requirements. The control unit manages the sequential activation of different wavelength sources without external intervention, optimizing the detection sequence and timing to minimize overall detection time while ensuring accurate color distinction
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
Enhances color distinction accuracy by utilizing sequential light source activation and two-dimensional sensing, enabling precise detection of bacterial colonies in culture media.
Implementation Method 1
a light emitter provided with multiple types of light sources configured to emit light in different colors from one another
Implementation Method 2
a light receiver in which a plurality of optical sensors are two-dimensionally arranged
Data Source
AI summary
According to an aspect, a detection device includes: a light emitter provided with multiple types of light sources configured to emit light in different colors from one another; and a light receiver in which a plurality of optical sensors are two-dimensionally arranged. The detection device is configured to perform detection processing. In the detection processing, the multiple types of the light sources are turned on at different times from one another, and detection is performed by the optical sensors each time any one of the light sources is turned on. The light sources are provided such that the light sources to be turned on in the detection processing are changeable depending on an object to be detected that is irradiated with the light from the light emitter.