Modular Infrared Gas Detector with Interchangeable Outer Elements
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Solution Overview
Problem
Existing non-dispersive infrared gas analyzers have limited adaptability to different gas components, as their detector chambers and sensors are permanently integrated, making it difficult to change or combine detectors for various gas measurements.
Innovation Solution
A modular radiation detector design with interchangeable components, including base and outer elements that form detector chambers, allowing for adjustable lengths and ratios, and the use of optical and gas filters to enhance measurement accuracy and adaptability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If detectors are designed with permanently integrated detector chambers and sensors, then manufacturing is simplified, but adaptability to different gas components is reduced
Solution Approach 1:
The detector is divided into separate functional modules: a base element containing the sensor and channel, and interchangeable outer elements that form the detector chambers. This segmentation allows the sensor to be manufactured once and reused with multiple outer elements designed for different gas components, resolving the contradiction between manufacturing simplicity and adaptability.
Solution Approach 2:
The base element with the integrated sensor serves as a universal component that can be combined with different outer elements to create detectors for various gas components. This multi-functionality approach allows one sensor unit to perform multiple measurement tasks by simply changing the outer element, maintaining manufacturing efficiency while achieving versatility.
2Ease of manufacture
If detector chambers are fixed in size and configuration, then manufacturing is easier, but measurement precision for different gas concentrations is compromised
Solution Approach 1:
The detector chamber configuration becomes dynamic and adjustable through the interchangeable outer elements. Different outer elements provide different chamber volumes and geometries, allowing the optical path length and gas volume to be optimized for specific measurement ranges and gas concentrations, thereby improving measurement precision while maintaining easy manufacturing through standardized components.
Solution Approach 2:
By changing the outer element, physical parameters of the detector chamber such as volume, surface area, and optical path length are adjusted. This allows optimization of the detector response for different gas concentrations and absorption characteristics, improving measurement precision without complicating the manufacturing of individual components.
3Device complexity
If multiple detectors for different gases are permanently integrated, then device complexity is reduced, but ease of operation for selective measurement is worsened
Solution Approach 1:
The detector system is segmented into a common base element and separate outer elements for different gases. This allows the user to simply remove one outer element and attach another for different gas measurements, greatly simplifying operation compared to switching between entirely different integrated detector assemblies, while keeping the overall device structure relatively simple.
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 cost-effective and flexible adaptation to different gas components, improving measurement quality by compensating for absorption curve shifts and reducing cross-sensitivities, and simplifying the integration into existing analyzers.
Implementation Method 1
a separating element (7) which is transparent to infrared radiation and impermeable to gas
Implementation Method 2
Due to the wavelength-specific absorption of the radiation penetrating them, the amounts of gas enclosed in the chambers heat up differently
Implementation Method 3
the amounts of gas enclosed in the chambers heat up differently, so that a pressure difference arises
Implementation Method 4
a pressure-sensitive sensor, for example a membrane capacitor, is integrated
Data Source
Figure 1
Figure 2~3
Figure 4~5
AI summary
The invention relates to a radiation detector (2) for a non-dispersive infrared gas analyzer having two detector chambers (6), which are surrounded by a housing (1) and separated by a separating element (7) permeable to infrared radiation and impermeable to gas and which can be filled with a radiation-absorbing measurement gas. A receiving element (9), which has a measuring system (10) fastened therein and comprising a flow- or pressure-sensitive sensor, can be attached to a contact surface (8) on an outer face of the housing (1). Each detector chamber (6) is pneumatically connected to the measuring system (10) by means of a channel (11), which extends in the housing (1) and is open to gas. The housing (1) of the radiation detector (2) is modularly constructed and comprises a base element (3), which encloses the channel (11), the separating element (7), and the measuring system (1) fastened in the receiving element (9), and a first and a second outer element (4, 5), each of which can be connected to the base element (3) and surrounds a detector chamber (6). The outer elements (4, 5) have openings, which lie in the beam path of the infrared radiation and are sealed in a gas-tight manner by means of a radiation-permeable window (12). The receiving element (9) and the first and the second outer elements (4, 5) are joined to the base element (3).