Actuation-and-detecting module for gas sensing
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Solution Overview
Problem
Conventional gas sensors in portable devices face inefficiencies in air monitoring due to the lack of an actuator for guiding air flow, leading to prolonged detection times and interference from heat and gas pollution generated by device components, which compromises measurement accuracy.
Innovation Solution
An actuation-and-detecting module with a main body, actuators, and sensors, featuring a detecting chamber with one-way air flow and piezoelectric actuators to rapidly introduce air to the gas sensor, minimizing heat interference and maintaining ambient air properties, while separate compartments and sensors prevent internal gas pollution from affecting measurements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If an actuator is added to form an actuation-and-detecting module in combination, then the detecting efficiency is improved, but the heat generated by the actuator interferes with the gas sensor measurement
Solution Approach 1:
The device is divided into separate functional modules: the actuator module for air transport and the gas sensing module for detection. These modules are spatially separated to prevent thermal interference from the actuator from affecting the gas sensor, while maintaining independent operational capabilities.
Solution Approach 2:
A heat isolation structure or thermal barrier is introduced as an intermediary between the actuator and the gas sensor. This intermediary component blocks or reduces heat transfer from the actuator to the gas sensor, enabling the actuator to operate at high speed without compromising measurement accuracy.
2Speed
If an actuator is added to guide air flow, then the air transport speed is improved, but the interfering substances from device components are introduced into the detecting module
Solution Approach 1:
The gas sensing function is extracted from the actuator assembly and placed in a separate, isolated chamber. This separation ensures that interfering substances generated by the actuator and device components cannot contaminate the gas sensor environment, allowing high-speed air transport without pollution interference.
Solution Approach 2:
The gas sensing chamber is designed as an isolated environment that prevents contact with interfering substances from the actuator and device components. This inert-like isolation ensures that only clean ambient air reaches the gas sensor, maintaining measurement accuracy despite high-speed operation.
3Device complexity
If the detecting chamber allows air to flow back along the same path, then the device complexity is reduced, but the measurement precision is compromised
Solution Approach 1:
The detecting chamber is segmented into distinct inlet and outlet pathways, creating a one-way flow channel. This segmentation prevents air from flowing back along the same path, ensuring that fresh ambient air continuously reaches the gas sensor for accurate measurement while maintaining manageable device complexity.
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 detection efficiency by ensuring air is introduced to the sensor quickly and accurately, maintaining the properties of ambient air and reducing interference from internal device components, thereby improving measurement precision and accuracy.
Implementation Method 1
a resonance plate is driven by the piezoelectric actuator
Implementation Method 2
a resonance plate is driven by the piezoelectric actuator
Data Source
AI summary
An actuation-and-detecting module is disclosed and includes a main body, a particle detecting base, plural actuators and sensors. The main body has a first compartment divided into a first chamber and a second chamber, a second compartment having a third chamber and a third compartment divided into a fourth chamber and a fifth chamber by a carrying partition. The particle detecting base is disposed between the fourth chamber and the carrying partition. The first actuator is disposed between the second chamber and a first partition. The second actuator is disposed within a receiving slot of the particle detecting base. The first sensor is disposed within the first chamber. The second sensor is disposed within the third chamber for detecting the air in the third chamber. The third sensor is disposed within a detecting channel of the particle detecting base for detecting the air in the detecting channel.