Measuring Device Self-Test Temperature Compensation
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Solution Overview
Problem
Measuring devices in industrial or private environments face challenges in ensuring the reliability of their self-test functions, as existing technologies do not adequately account for temperature variations affecting measurement results, leading to potential measurement errors and malfunctions.
Innovation Solution
Incorporating a temperature sensor to record and compare the current sensor circuit temperature with a reference temperature from calibration, allowing for temperature compensation of measurement results during self-tests, and triggering warnings or error messages based on detected malfunctions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a self-test function is implemented without temperature compensation, then the device complexity is reduced, but the measurement precision and reliability deteriorate due to temperature variations
Solution Approach 1:
The patent applies parameter changes by introducing temperature as a compensating parameter. The control circuit determines the difference between current sensor circuit temperature and reference temperature, then uses this temperature difference to correct the measurement result. This resolves the contradiction by improving measurement precision through temperature compensation while keeping the self-test function relatively simple.
Solution Approach 2:
The patent replaces complex mechanical or hardware-based temperature stabilization systems with a software-based correction approach. Instead of physically controlling temperature, the system uses mathematical correction of measurement results based on temperature differences, thereby improving precision without significantly increasing device complexity.
2Reliability
If temperature compensation is added to the self-test function, then the reliability is improved, but the device complexity increases
Solution Approach 1:
The temperature sensor serves multiple functions: it monitors the sensor circuit temperature during normal operation and also provides temperature data for self-test compensation. This multi-functionality improves self-test reliability without requiring a separate temperature monitoring system, thereby limiting the increase in device complexity.
Solution Approach 2:
The system performs self-diagnosis and self-correction by automatically comparing current temperature with reference temperature and adjusting measurement results accordingly. This self-service capability improves reliability without requiring external calibration equipment or complex test procedures, keeping the added complexity minimal.
3Measurement precision
If the reference temperature is determined without considering application-specific conditions, then the ease of manufacture is improved, but the measurement precision deteriorates
Solution Approach 1:
The patent performs preliminary temperature characterization during the calibration phase, storing reference temperature values that are specific to different application conditions. This preliminary action allows the device to be manufactured with generic calibration procedures while still achieving application-specific precision through the stored reference values, resolving the contradiction between manufacturing ease and measurement precision.
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 enhances the reliability of self-tests by accurately compensating for temperature-dependent measurement variations, enabling early detection of malfunctions and preventing errors, thus improving the overall quality and specificity of device self-tests.
Implementation Method 1
a temperature sensor is provided, which is configured to detect, i.e., record a temperature of the sensor circuit
Data Source
AI summary
A measuring device for process automation in an industrial or private environment is provided, including: a sensor circuit configured to detect one or more measured variables; and a control circuit configured to determine a measurement result from the detected one or more measured variables and to determine a difference between a temperature of the sensor circuit and a reference temperature detected during a calibration of a self-test function of the measuring device, the control circuit being further configured to perform a correction of the measurement result depending on the difference between the temperature of the sensor circuit and the reference temperature during execution of the self-test function. A method for performing a correction of a measurement result of a measuring device for process automation in an industrial or private environment is also provided.