Pulsed Gas Sensor Early Warning via Partial Integration
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Solution Overview
Problem
Conventional pulsed gas sensors, such as infrared-based systems, experience long settling times before providing reliable measurements, which is problematic for safety applications requiring rapid detection, especially when the system is frequently switched on and off.
Innovation Solution
The radiation source remains on for a specific time with integrated signal boosting through multiple measurements, allowing early estimation of average values and immediate alarm triggering if thresholds are exceeded, and using a temperature probe for thermal equilibrium correction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If the radiation source is operated in pulsed mode to reduce energy consumption and filtering complexity, then energy efficiency and device simplicity are improved, but the settling time before reliable measurements become available increases significantly
Solution Approach 1:
The patent applies preliminary action by performing multiple individual measurements and integrations during the first pulse cycle before the system has fully settled. The control means calculates an early average value from these preliminary measurements and compares it against threshold values to enable early warning, thus preparing the measurement and evaluation process in advance to overcome the settling time delay
Solution Approach 2:
The patent uses partial action by taking only the first few individual measurements during the initial pulse cycles for early evaluation, rather than waiting for complete settling and multiple cycles. This partial measurement approach is sufficient for safety-critical early detection, trading some measurement completeness for significantly reduced detection time
2Speed
If multiple individual measurements are integrated during the first pulse to enable early warning, then detection speed is improved, but measurement precision may be compromised due to thermal non-equilibrium
Solution Approach 1:
The patent implements feedback by continuously monitoring the detector signal during the first pulse and using the calculated early average value to trigger warnings when threshold values are exceeded. The control means uses this feedback loop to enable rapid detection while the system is still settling, with the understanding that subsequent measurements will refine the accuracy as thermal equilibrium is achieved
Solution Approach 2:
The patent applies parameter changes by evaluating measurements taken during the dynamic thermal transition phase rather than waiting for stable equilibrium conditions. The control means adjusts its evaluation parameters to work with the changing thermal conditions during settling, enabling detection speed improvement while managing the inherent precision trade-off through appropriate threshold setting and continuous monitoring
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 approach reduces the time to obtain reliable gas concentration measurements post-startup, enabling rapid safety warnings with minimized false alarms and maintaining system simplicity and size.
Implementation Method 1
Gases of this type consist of two different kinds of atoms such as CO2, but also CO and NOx, and all hydrocarbons such as methane, propane or other natural gases used for heating. The IR light is able, by cooperating with the dipole moment of the polar molecule, to stimulate the molecules by stimulating rotational and vibratory oscillations. The heat energy of the IR light is thus transmitted to the gas and, in the same way, the intensity of an IR beam passing through a gas volume is reduced.
Implementation Method 2
at least one detector device which detects the radiation and generates an output signal which is dependent on the presence and/or the concentration of the analyte
Data Source
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AI summary
The present invention relates to a method for measuring the presence and/or the concentration of an analyte using a gas sensor assembly and to a corresponding gas sensor assembly. The gas sensor assembly comprises, in particular, a radiation-emitting radiation source (102), a gas measurement chamber (104) which may be filled with a test gas (110) containing the at least one analyte to be measured, and at least one detector device (108) which detects the radiation (116) and generates an output signal which is dependent on the presence and/or the concentration of the analyte. In order to meet increased safety requirements and to avoid the drawbacks of the known systems without inadmissible increased complexity and overall size, the radiation source emits radiation in the form of pulses and, during each radiation pulse, a large number of individual values (304) are recorded for generating an average measured value, the first of the large number of individual values being compared, during the first radiation pulse, with a predetermined threshold value and an alarm signal (136) being generated if the threshold value is exceeded.