Actuating and Sensing Module for Portable Air Quality Monitoring
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Solution Overview
Problem
Portable electronic devices equipped with sensors for environmental monitoring face challenges in maintaining consistent fluid flow through natural convection, leading to long response times and reduced monitoring precision.
Innovation Solution
A portable device with an integrated actuating and sensing module, featuring a carrier, sensor, actuating device, driving and transmitting controller, and battery, which uses a piezoelectric actuating device to stabilize and uniformly deliver fluid to the sensor, reducing response time and enhancing monitoring precision.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the sensor is integrated into the portable electronic device and relies on natural convection to transfer fluid, then the device achieves portability, but the monitoring sensitivity and precision deteriorate due to inconsistent fluid flow
Solution Approach 1:
A micro pump is introduced as an intermediary component to actively transport fluid to the sensor surface. This mediator replaces the passive natural convection mechanism, ensuring consistent and controlled fluid delivery that maintains both portability and monitoring precision.
Solution Approach 2:
The natural convection system (thermal-driven fluid movement) is replaced with a mechanically actuated micro pump system. This substitution provides active control over fluid flow, eliminating the inconsistency inherent in passive convection while maintaining the device's portable form factor.
2Device complexity
If the sensor relies on circulating fluid transferred by natural convection, then the device structure remains simple, but the response time increases due to inability to trigger consistent sensor response
Solution Approach 1:
The micro pump serves as an intermediary that actively manages fluid delivery to the sensor. By introducing this controlled intermediary, the system achieves rapid and consistent sensor response without requiring complex overall device architecture, as the pump integrates seamlessly into the existing structure.
Solution Approach 2:
The micro pump performs preliminary action by pre-positioning and delivering fluid to the sensor surface before measurement is needed. This proactive fluid delivery ensures the sensor is always ready for immediate response, eliminating the delay inherent in passive convection-based systems.
3Use of energy by moving object
If natural convection is used to transfer fluid to the sensor, then energy consumption is reduced, but monitoring accuracy deteriorates due to unstable fluid flow
Solution Approach 1:
The micro pump acts as an energy-efficient intermediary that uses minimal power to achieve precise fluid control. By focusing energy only on the critical task of delivering fluid to the sensor surface rather than heating large volumes of air for convection, the system maintains low overall energy consumption while dramatically improving monitoring accuracy.
Solution Approach 2:
The thermal convection system (which requires continuous energy input to maintain temperature gradients) is replaced with a mechanical micro pump system that consumes minimal energy. The pump delivers fluid directly and consistently without the continuous energy demand of thermal maintenance, achieving both energy efficiency and measurement 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 device achieves precise and real-time environmental monitoring by ensuring a stable fluid supply to the sensor, enabling immediate air quality data transmission and notification, thereby aiding in preventing health impacts from air pollution.
Implementation Method 1
uses a piezoelectric actuating device to stabilize and uniformly deliver fluid to the sensor
Implementation Method 2
The sensor is provided with a stable and uniform amount of the fluid continuously, the time for enabling the sensor to monitor the fluid is largely reduced
Data Source
AI summary
A portable device for monitoring environmental air quality includes a main body and at least one actuating and sensing module. The actuating and sensing module is disposed in the main body. The actuating and sensing module includes a carrier, at least one sensor, at least one actuating device, a driving and transmitting controller and a battery. The sensor, the actuating device, the driving and transmitting controller and the battery are disposed on the carrier. The actuating device is enabled to transport fluid to flow toward the sensor so as to make the fluid measured by the sensor and transmit an output data of the monitored data to a connection device. The information carried in the output data may be displayed, stored and transmitted by the connection device, whereby users can take precautions against the air pollution immediately to prevent from the ill influence on human health.