Sensor Signal Conversion Using Fast Drift-Compensated Functions
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Solution Overview
Problem
Existing sensor technologies face challenges in converting electrical signals into measurement signals in real-time due to lengthy conversion times, which can exceed the interval between measurements, and are affected by temperature and aging-related drifts, limiting their ability to provide real-time data.
Innovation Solution
A method is introduced to determine a measurement signal using a mathematical function, such as a linear function, based on pairs of electrical and measurement signal values, allowing for rapid conversion without relying on the sensor's conversion electronics, and accounting for temperature and aging effects by periodically recalculating the function's coefficients.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the sensor conversion is used to convert electrical signal into measurement signal, then the conversion is accurate and accounts for physical parameters, but the conversion time is too long to provide real-time values
Solution Approach 1:
The patent pre-determines a mathematical function (such as a linear function with gradient and y-intercept) that approximates the sensor conversion characteristics before actual measurement. This preliminary action stores the conversion relationship in a simplified form, allowing rapid real-time conversion without repeatedly executing the full sensor conversion process, thus resolving the contradiction between conversion accuracy and conversion time.
2Measurement precision
If the sensor conversion is used to ensure accurate measurement, then the measurement precision is maintained, but the computational power consumption increases
Solution Approach 1:
The patent extracts the essential conversion characteristics from the complex sensor conversion process and represents them through a simplified mathematical function (e.g., linear function with gradient and y-intercept). This extraction removes unnecessary computational complexity while retaining the core measurement accuracy, thereby reducing computational power consumption during actual measurement operations.
3Productivity
If rapid measurement is required with shorter acquisition time, then real-time capability is achieved, but the conversion accuracy may be compromised
Solution Approach 1:
The patent pre-determines a mathematical function that approximates the sensor conversion characteristics before actual measurement. This preliminary action stores the conversion relationship in a simplified form, allowing rapid real-time conversion without repeatedly executing the full sensor conversion process, thus resolving the contradiction between conversion accuracy and conversion time.
Data Source
AI summary
A method for determining a measurement signal based on a sensor output electrical signal. The electrical signal based on the measured quantity conversion of the electrical signal into a measurement signal. Determining the measurement signal for least two pairs of values by converting the electrical signal into a measurement signal for at least two predetermined electrical signal values, each pair of values including the electrical signal and measurement signal. A mathematical function allowing a measurement signal to be obtained based on the electrical signal is determined based on the pairs of values. The measurement signal being substantially equal to the measurement signal obtained by applying the sensor conversion to the same sensor electrical signal. At least two measurement signals are determined without sensor conversion. Acquisition of the two measurement signals separated by a time shorter than the time to convert an electrical signal into a measurement signal by sensor conversion.