Infrared Measuring Device Common Transparent Cover
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Solution Overview
Problem
Infrared measuring devices for fluid analysis face challenges such as time-consuming fluid changes, residual fluid contamination, and fluctuating test conditions, which affect measurement accuracy and comparability, especially in online gas production processes.
Innovation Solution
The design of an infrared measuring device with separate and adjustable reference and sample chambers, each with identical transparent covers and anti-reflection layers, allows for precise and simultaneous measurements without fluid change, minimizing measurement errors and maintaining consistent conditions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the chamber is filled with reference fluid and then sample fluid sequentially, then the measurement can be performed, but the measurement time becomes very long and residual fluid contamination occurs
Solution Approach 1:
The single chamber is divided into two separate chambers: a reference chamber for holding reference fluid and a sample chamber for holding sample fluid. This segmentation allows both chambers to exist simultaneously and independently, eliminating the need to empty and clean the chamber between measurements, thus reducing measurement time while maintaining measurement accuracy through dedicated chambers for each fluid type.
Solution Approach 2:
A movable component (carriage or beam selector) acts as an intermediary to direct the infrared beam to either the reference chamber or the sample chamber. This intermediary mechanism enables sequential measurement of both chambers without requiring physical access to empty or clean the chambers, thereby eliminating residual fluid contamination and reducing measurement time.
2Productivity
If the chamber is flushed with nitrogen to remove residual fluid, then fluid change is accelerated, but nitrogen residues remain as new contaminants
Solution Approach 1:
The reference chamber and sample chamber are separated as independent components, each capable of being filled and emptied independently. This eliminates the need for flushing operations between measurements, as the beam can be directed to the appropriate chamber without contamination concerns, maintaining both high productivity and measurement precision.
Solution Approach 2:
The movable beam director acts as an intermediary that allows the system to switch between reference and sample measurements without requiring fluid changes or flushing operations. This eliminates the introduction of nitrogen residues or other flushing media that would contaminate the chamber and affect measurement accuracy.
3Reliability
If transparent covers are added to chamber surfaces, then the chambers are protected, but measurement errors occur due to thickness variations and material property differences
Solution Approach 1:
The transparent covers of the reference chamber and sample chamber are merged into a single common transparent cover structure. This ensures that both chambers use identical cover material with exactly the same thickness and optical properties, eliminating measurement errors caused by variations between separate covers while maintaining chamber protection.
Solution Approach 2:
The common transparent cover provides homogeneous optical properties across both chamber openings. By using a single piece of material with uniform thickness and composition for both chambers, the system eliminates differences in light transmission that would otherwise cause measurement errors, while still providing protective coverage.
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 solution reduces measurement time, eliminates residual fluid contamination, and ensures consistent measurement conditions, enhancing the accuracy and comparability of infrared measurements in fluid analysis.
Implementation Method 1
an infrared beam is emitted from an infrared beam source and directed through a chamber in which the fluid is located
Implementation Method 2
The recorded spectral distribution contains characteristic features such as absorption bands, which can be assigned to the components of the reference fluid
Implementation Method 3
the first transparent cover is provided on its side facing away from the sample chamber with a common first outer anti-reflection layer
Data Source
Figure 1~2
Figure 3
Figure 4~5
AI summary
The invention relates to an infrared measuring device with an infrared beam source, a reference chamber for receiving a reference fluid, a sample chamber for receiving a sample fluid to be analysed, an infrared detector and an evaluation device. In a first operating position, the infrared beam passes through the reference chamber, while in a second operating position, the infrared beam penetrates the sample chamber. The reference chamber and the sample chamber can be shifted as a unit between the at least two operating positions. A beam entry surface of the reference chamber and a beam entry surface of the sample chamber are both covered by a transparent cover. A beam exit surface of the reference chamber and a beam exit surface of the sample chamber are also both covered by a transparent cover. According to the invention, the cover of the beam entry surface of the reference chamber and the cover of the beam entry surface of the sample chamber are formed from a common first transparent cover and/or the cover of the beam exit surface of the reference chamber and the cover of the beam exit surface of the sample chamber are covered by a common second transparent cover.