Particle Sensor Columnar Array for Compact PM Detection
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Solution Overview
Problem
Conventional particulate matter sensing devices are inconvenient to carry, have large dimensions, and are difficult to integrate into electronic apparatuses, limiting their usability and effectiveness in detecting harmful PM 10 and PM 2.5 particles.
Innovation Solution
A particle sensing device incorporating a columnar array with light-absorbing materials and a light-sensing element, which utilizes a light beam to detect particulate matter by absorbing scattered light, enhancing sensitivity and allowing for integration into various electronic devices with low power consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a conventional optical particle sensing device is used to detect particulate matters, then the detection function is achieved, but the device dimensions become large and it becomes difficult to integrate into electronic apparatuses
Solution Approach 1:
The sensing chamber is segmented into distinct regions: a light source region, a particle detection region with columnar array, and a light sensor region. This segmentation allows each component to be optimized independently while maintaining compact overall dimensions, enabling integration into portable electronic devices while preserving detection functionality
Solution Approach 2:
The columnar array structures are nested within the sensing chamber, with multiple columnar elements arranged in a compact configuration. The light-absorbing materials are nested within the columnar structures, maximizing the use of space and achieving high detection sensitivity in a miniaturized form factor
2Measurement precision
If conventional particle sensing devices are used, then particulate matter detection is achieved, but the devices are inconvenient to carry due to oversized dimensions
Solution Approach 1:
The device employs a dynamic light source that can be activated only when particle detection is required, reducing power consumption and enabling battery operation in portable devices. The sensing system dynamically adjusts light intensity and detection parameters based on environmental conditions, optimizing performance while minimizing energy usage for extended portability
3Measurement precision
If conventional optical sensing devices are used, then particle detection capability is provided, but the devices have high power consumption
Solution Approach 1:
The light source operates in periodic pulses rather than continuously, with the detection system activated only when particle measurement is required. This periodic operation dramatically reduces power consumption while maintaining adequate detection capability, enabling the device to run on small batteries for extended periods and improving overall portability
Solution Approach 2:
The device replaces complex mechanical particle manipulation systems with optical detection methods using light-absorbing columnar arrays. This substitution eliminates the need for mechanical pumps, motors, and moving parts that consume significant power, achieving particle detection through passive optical measurement that requires minimal energy input
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 device effectively detects particulate matter density with improved sensitivity and low power consumption, enabling integration into portable electronic devices for real-time monitoring and providing data for environmental and health applications.
Implementation Method 1
a material of the columnar objects includes a light-absorbing material
Implementation Method 2
the photodiode 150 are disposed opposite to each other... the light intensity of the light beam 142a′ finally reaching the photodiode 150 decreases... the photocurrent of the photodiode 150 decreases accordingly
Data Source
AI summary
A particle sensing device, which senses a particulate matter by using a light beam from a light source, is provided. The particle sensing device includes a columnar array and a light-sensing element. The columnar array is disposed at a downstream side of a traveling path of the light beam. The columnar array has a plurality of columnar objects. A gap is existed between two adjacent columnar objects. The light-sensing element is disposed opposite to the columnar array and at a downstream side of a traveling path of the light beam. Wherein, the traveling path of the light beam is parallel with a length direction of each columnar object. And, the light beam passes through the gap for arriving at the light-sensing element. The particle sensing device can sense the particulate matter satisfactorily and can be simply integrated into various electronic apparatuses.