Portable Spectrometer Motion Sensing for Representative Sampling
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Solution Overview
Problem
Portable spectrometers often suffer from reduced accuracy and reliability in optical measurements due to insufficient representation of the measurement object, especially when used by non-expert users, as they may not adequately capture the spatial variations in the composition of inhomogeneous samples.
Innovation Solution
A portable spectrometer equipped with an optical element, photosensor, movement sensor, and evaluation device that determines measurement quality and spectral information by integrating movement data to ensure accurate sampling of the measurement object, allowing for automatic triggering of spectral measurements based on predetermined conditions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the spectrometer is moved too slowly or not at all during measurement, then the device remains stable and easy to operate, but the measurement accuracy decreases significantly as the spectrum may not be representative for the entirety of the inhomogeneous measurement object
Solution Approach 1:
The system performs preliminary actions by automatically triggering spectral measurements based on detected movement conditions. The movement sensor detects when the spectrometer has been moved sufficiently, and the evaluation device automatically initiates the measurement process, eliminating the need for manual timing or positioning decisions by the user.
Solution Approach 2:
The system implements feedback by using the movement sensor to continuously monitor the spectrometer's position changes and providing this information to the evaluation device. This feedback loop allows the system to automatically determine when measurement conditions are met, ensuring representative sampling without requiring user expertise in timing or positioning.
2Measurement precision
If the spectrometer is moved along the measurement object to capture spatial variations, then the representativeness of the spectrum improves, but the device complexity increases due to additional sensors and evaluation requirements
Solution Approach 1:
The system merges the movement sensing capability and spectral measurement evaluation into a single integrated portable spectrometer unit. The movement sensor and evaluation device work together with the optical measurement components to provide automated quality assessment, combining multiple functions in one device rather than requiring separate systems.
Solution Approach 2:
The evaluation device performs self-service by automatically assessing measurement quality based on movement sensor data and photosensor signals. The system independently determines whether measurement conditions are satisfied and triggers spectral measurements without requiring external monitoring or manual evaluation, reducing the operational burden on users.
3Reliability
If automated measurement triggering based on movement data is implemented, then the accuracy and reliability of optical measurements improves, but the device complexity increases due to additional sensors and processing requirements
Solution Approach 1:
The evaluation device serves multiple functions: it processes photosensor signals for spectral analysis, evaluates movement sensor data for quality assessment, and automatically triggers measurements when conditions are met. This multi-functionality reduces the need for separate dedicated components for each task, optimizing the device architecture.
Solution Approach 2:
The system replaces manual mechanical operation (physically moving and positioning the spectrometer) with automated electronic control based on movement sensor detection. The electronic triggering mechanism substitutes for manual timing and positioning actions, improving reliability while the integrated design keeps complexity manageable.
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
Enhances the accuracy and reliability of optical measurements by ensuring representative sampling of the measurement object, particularly for inhomogeneous samples, through automated data collection and analysis.
Implementation Method 1
at least one optical element configured for separating incident optical radiation provided by the measurement object into a spectrum of constituent wavelength components
Implementation Method 2
at least one photosensor comprising at least one photosensitive region configured for receiving the optical radiation from the optical element, wherein the photosensor is configured for generating at least one photosensor signal dependent on an illumination of the photosensitive region by the optical radiation
Data Source
AI summary
Disclosed herein is a portable spectrometer for performing at least one optical measurement on at least one measurement object. The portable spectrometer includes:at least one optical element configured for separating incident optical radiation provided by the measurement object into a spectrum of constituent wavelength components;at least one photosensor including at least one photosensitive region configured for receiving the optical radiation from the optical element;at least one movement sensor configured for generating at least one movement sensor signal dependent on a movement of at least one of the portable spectrometer and the measurement object; andat least one evaluation device configured for determining at least one item of measurement quality information on the optical measurement by using the movement sensor signal. Also disclosed herein is a method for performing at least one optical measurement on at least one measurement object.