Color Gas Sensor Module Optical Measurement Low Power
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Solution Overview
Problem
Conventional gas sensors require separate heating devices and high power consumption, making them unsuitable for miniaturization and integration into mobile and wearable devices, and are vulnerable to humidity and temperature, limiting their durability and accuracy in gas concentration measurement.
Innovation Solution
A color gas sensor module with an optical measurement device that includes a gas sensor changing color in response to gas exposure, utilizing a light emitter and receiver to quantify gas concentration through reflectivity changes, allowing for low-power operation and miniaturization, and featuring a membrane and multiple film layers for enhanced reactivity and durability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If conventional gas sensors with heating devices are used, then gas detection sensitivity is improved, but power consumption increases and device miniaturization becomes difficult
Solution Approach 1:
The patent replaces the thermal field (heating device) with an optical field (light emitter and receiver). The gas sensor uses optical reflection changes instead of resistance changes, eliminating the need for continuous heating and enabling low-power operation while maintaining detection capability.
Solution Approach 2:
The patent utilizes color changes in the gas sensor material when exposed to target gases. The light receiver detects these color changes through reflectivity measurements, enabling gas detection without heating devices and significantly reducing power consumption.
2Measurement precision
If conventional gas sensors with separate heating devices are used, then gas detection capability is improved, but device complexity and size increase
Solution Approach 1:
The patent merges the gas sensor and optical measurement device into a single integrated module. The gas sensor includes an optical layer that directly interacts with light from the emitter, eliminating the need for separate heating devices and measurement equipment, thus simplifying the overall device structure.
Solution Approach 2:
The gas sensor material serves multiple functions: it acts as both the sensing element and the optical interaction layer. The same layer that changes color in response to gas also provides the optical reflection signal, reducing the number of components needed.
3Measurement precision
If conventional gas sensors are used, then current gas concentration measurement is possible, but cumulative measurement capability is lost
Solution Approach 1:
The patent enables continuous optical measurement of the gas sensor's color state. By continuously monitoring reflectivity changes, the system can track both current gas concentration and accumulate exposure data over time, providing both instantaneous and cumulative measurement capabilities.
4Ease of operation
If conventional gas sensors are exposed to external environment, then gas detection is possible, but durability decreases due to humidity and temperature
Solution Approach 1:
The patent uses a thin film structure for the gas sensor with an optical layer that is inherently more resistant to environmental degradation. The film-based structure reduces vulnerability to humidity and temperature compared to bulk semiconductor materials, improving durability in external environments.
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
Enables low-power gas detection and miniaturization, allowing for accurate quantitative measurement of gas concentration without separate heating devices, improving durability and enabling integration into mobile and wearable devices.
Implementation Method 1
an optical measurement device including a light emitter for emitting light to a gas sensor and a light receiver for receiving the light reflected from the gas sensor
Implementation Method 2
a gas sensor provided in the housing and configured to change color by reacting with the gas
Data Source
AI summary
The present disclosure relates to a color gas sensor module including an optical measurement device, a housing having an interior space therein and a gas movement passage allowing a gas to move from outside to the interior space, wherein the optical measurement device is provided in the housing and includes a light emitter that emit light and a light receiver that receives reflected light, and a gas sensor included in the housing and changing color by reacting with gas, wherein the light emitter emits light to the gas sensor, and the light receiver receives light reflected from the gas sensor.