Terahertz Gas Detection Chamber Environmental Control
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Solution Overview
Problem
The detection of terahertz spectra of target gases in natural environments is challenging due to environmental factors like humidity, wind speed, and air composition, making it difficult to simulate actual conditions in a laboratory setting.
Innovation Solution
A gas detecting apparatus based on terahertz spectroscopy with a sample chamber that allows for adjustable environmental parameters, including humidity, temperature, and gas composition, using a gas feeding unit, vacuum pump, and terahertz wave generation and detection units, enabling both static and dynamic gas flow conditions to mimic natural environments.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If terahertz spectroscopy is used for gas detection in natural environments, then material identification and quantitative analysis capability is improved, but detection accuracy deteriorates due to environmental factors like humidity, wind speed, and air composition
Solution Approach 1:
The patent introduces a sample chamber as an intermediary medium between the gas source and the terahertz detection system. This chamber allows controlled interaction between terahertz waves and target gases while isolating the detection system from environmental interference factors such as humidity, wind, and air composition variations.
Solution Approach 2:
The patent creates a simulated environmental copy within the sample chamber that replicates natural environment conditions (humidity, temperature, gas composition) without the harmful external factors. This allows the system to study gas spectra under controlled conditions that mimic real-world scenarios while maintaining measurement accuracy.
2Adaptability or versatility
If environmental factors are simulated in laboratory settings, then real-world detection conditions are improved, but device complexity increases due to multiple regulation devices
Solution Approach 1:
The patent divides the environmental simulation function into separate independent modules: a humidity regulation device, a temperature regulation device, and a gas feeding unit. Each module controls a specific environmental parameter independently, allowing flexible combination of conditions while keeping each individual component relatively simple.
Solution Approach 2:
The sample chamber serves multiple functions simultaneously: it acts as the detection cavity, the environmental simulation chamber, and the gas flow control interface. This multi-functionality reduces the need for separate dedicated components for each function, thereby reducing overall device complexity.
3Measurement precision
If background noise is reduced through environmental control, then signal-to-noise ratio is improved, but measurement time increases due to chamber evacuation and setup
Solution Approach 1:
The patent performs chamber evacuation and environmental parameter setup before the actual gas detection measurement begins. The vacuum pump evacuates the chamber in advance, and the humidity and temperature regulation devices are pre-configured to desired levels. This preliminary preparation ensures low background noise conditions are established before the target gas is introduced and measurement starts.
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
This apparatus allows for precise regulation of environmental parameters within the sample chamber, reducing background noise and enhancing the accuracy of both qualitative and quantitative analysis of gases by simulating real-world detection conditions.
Implementation Method 1
a terahertz wave generating unit and a terahertz wave detecting unit disposed outside the sample chamber. The terahertz wave generating unit is configured to send the terahertz wave into the sample chamber from a first side of the sample chamber. The terahertz wave detecting unit is configured to detect the terahertz wave transmitted out from a second side opposite to the first side of the sample chamber
Implementation Method 2
The vacuum pump is connected to the sample chamber to evacuate the sample chamber
Implementation Method 3
The gas feeding unit includes a gas feeding tube connected to the sample chamber. The gas feeding tube includes a main gas feeding tube and a plurality of branch gas feeding tubes
Implementation Method 4
The humidity regulation device includes a moisture supplying device and a humidity regulating valve. The moisture supplying device configured to be in fluid communication with the sample chamber to supply liquid water and/or water vapor into the sample chamber
Implementation Method 5
The temperature regulation device includes a heater disposed on the sample chamber to heat the gas in the sample chamber
Implementation Method 6
Most materials can interact with the terahertz wave to some degree, and each material has its own frequency spectrum, which can be considered as a kind of 'fingerprint'. Therefore, terahertz spectroscopy is uniquely advantageous for material identification and quantitative analysis
Data Source
AI summary
A gas detecting apparatus and a gas detecting method based on terahertz spectroscopy are provided. The apparatus includes a sample chamber allowing a terahertz wave to pass therethrough; a gas feeding unit connected to the sample chamber to feed gas into the sample chamber; a gas outputting unit connected to the sample chamber to output gas from the sample chamber; and a vacuum pump connected to the sample chamber to evacuate the sample chamber. The apparatus further comprises one or more of a pressure gauge disposed on the sample chamber, an anemometer disposed on the sample chamber, a humidity regulation device connected to the sample chamber, and a temperature regulation device connected to the sample chamber.