Rotary Gas Sensor for Sealed Container Detection
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Solution Overview
Problem
Existing gas detection devices struggle to accurately detect gases in stagnant environments due to decreased response speed and sensitivity with lower gas flow rates, making it difficult to measure gases within sealed spaces effectively.
Innovation Solution
A gas detection device featuring a rotary body with a gas sensor mounted apart from its rotation axis, driven by a constant rotation mechanism, and a non-contact power and data transmission system, ensuring a consistent gas flow rate and accurate gas detection within sealed containers.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a gas sensor is disposed in an enclosed space to detect gas, then the gas can be detected inside the sealed container, but the response speed and detection sensitivity decrease due to stagnant gas with low flow rate
Solution Approach 1:
The gas sensor is mounted on a rotary body that rotates at a constant rate, transforming the static sensor into a dynamic system. This rotation creates continuous relative motion between the sensor and the stagnant gas, effectively simulating a constant flow rate environment and maintaining high response speed and detection sensitivity.
Solution Approach 2:
The rotary body acts as an intermediary mechanism between the stagnant gas environment and the gas sensor. By introducing this rotating platform, the system mediates the interaction between the sensor and gas, creating controlled relative motion without requiring actual gas flow through the sealed container.
2Measurement precision
If a gas sensor is disposed in an enclosed space to detect gas, then the gas can be detected inside the sealed container, but the detection sensitivity decreases with lower gas flow rates
Solution Approach 1:
The rotary body rotates at a constant rate, creating dynamic relative motion between the sensor and the stagnant gas. This effectively converts a low quantity of stationary gas into a high-velocity flow relative to the sensor surface, maintaining high detection sensitivity without requiring large quantities of gas to flow through the system.
Solution Approach 2:
The system changes the motion parameter of the sensor from static to rotational motion. This parameter change transforms the interaction between the sensor and gas molecules, effectively increasing the relative velocity and collision frequency without changing the actual gas quantity or flow rate in the sealed container.
3Measurement precision
If a rotary body with gas sensor is used to maintain constant gas flow rate, then high accuracy gas detection is achieved, but the device complexity increases
Solution Approach 1:
The patent replaces complex mechanical flow control systems with a simple constant-speed rotation mechanism. Instead of using pumps, valves, or flow controllers to maintain gas flow rate, the system uses a straightforward rotary body that rotates at constant speed, significantly simplifying the mechanical complexity while achieving the same detection accuracy.
Solution Approach 2:
The rotary body with mounted gas sensor serves dual functions: it both rotates to create relative motion for accurate detection and positions the sensor within the stagnant gas environment. This self-contained approach eliminates the need for separate flow generation mechanisms, reducing overall 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
Enables high-accuracy gas detection even in stagnant conditions by maintaining a constant gas flow rate relative to the sensor, allowing for precise measurement of gas concentrations within sealed spaces.
Implementation Method 1
a gas sensor that detects a gas based on a change in an electric signal due to adsorption of a gas to be measured
Implementation Method 2
the rotary body preferably includes a first magnet, and the drive unit preferably includes a second magnet. The drive unit preferably rotates the rotary body including the first magnet by causing the second magnet to rotate about the rotation axis, the first magnet and the second magnet attracting each other
Implementation Method 3
a power feeding coil that is disposed outside the sealed container and generates a magnetic field by the AC power supplied from the power feeding unit
Implementation Method 4
a power receiving coil that is disposed in the sealed container and generates AC power by the magnetic field generated by the power feeding coil
Data Source
AI summary
A gas detection device includes: a gas sensor that detects a gas based on a change in an electric signal due to adsorption of a gas to be measured; a rotary body having the gas sensor mounted therein; and a motor that rotates the rotary body. The gas sensor is disposed at a location apart from a rotation axis of the rotary body. The motor rotates the rotary body at a constant rate.