Calibrating Temperature Sensors in Plastic Preform Treatment Stations
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Solution Overview
Problem
Existing systems with multiple treatment stations for plastic preforms face challenges in calibrating temperature sensors to ensure uniform output, as individual stations react differently to environmental factors, leading to measurement errors and deviations from standard operating values.
Innovation Solution
A method and device that measure initial and subsequent temperature values of a preform before and after treatment, using a calibration device to adjust treatment parameters to align with a standard temperature curve, eliminating unintentional deviations and ensuring consistent output across stations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple treatment stations operate autonomously with individual temperature sensors, then each station can function independently, but measurement deviations and offsets occur between stations leading to non-uniform output quality
Solution Approach 1:
The patent implements preliminary calibration of temperature sensors in each treatment station using a reference temperature curve obtained from a reference measurement. By performing this calibration before actual operation, the system establishes accurate baseline measurements for each station, eliminating offsets and ensuring uniform output quality across all stations while maintaining their autonomous operation capability
Solution Approach 2:
The system continuously monitors temperature measurements against the reference curve and automatically adjusts treatment parameters based on detected deviations. This feedback mechanism compensates for sensor drift and environmental variations, maintaining measurement precision without compromising the autonomous operation of individual stations
2Measurement precision
If treatment parameters are adjusted to correct measurement deviations, then measurement accuracy improves, but system complexity increases due to calibration requirements
Solution Approach 1:
The patent creates a reference temperature curve by copying the ideal temperature profile from a reference measurement and uses this copied curve as a standard for calibrating all treatment stations. This approach simplifies the calibration process by providing a reusable template that can be applied across multiple stations without requiring complex individual calibration procedures for each station
Solution Approach 2:
The system adjusts treatment parameters such as temperature, heating time, and power levels based on the comparison between measured values and the reference curve. By changing these parameters dynamically, the system maintains measurement accuracy while using a relatively simple calibration approach that does not require complex hardware modifications
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 ensures that treatment parameters are adjusted to minimize deviations from standard values, maintaining measurement accuracy and quality across all treatment stations, thereby improving the uniformity of output.
Implementation Method 1
optical and/or electrical temperature sensors for temperature measurement, which measure the electromagnetic radiation emitted by the measuring preform, particularly thermal radiation
Data Source
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AI summary
The invention relates to a method for calibrating at least one treatment element, in particular at least one temperature sensor, of a treatment station, for treating plastic preforms, wherein first a measurement preform is provided, wherein at least a first measured value of the measurement preform is measured by means of at least one measuring element before the treatment of the measurement preform by means of the treatment station and a second measured value of the measurement preform is measured by means of the measuring element or a further measuring element during or after the treatment of the treatment station, and a mathematical temperature curve, in particular a mathematical temperature line, is recorded by means of the measuring element on the basis of at least said two measured values, wherein at least one calibrating device determines a deviation of the measured temperature curve from a mathematical standard temperature curve and at least partially eliminates said deviation by adjusting treatment parameters of the treatment station.