Temperature Correction Device for Sensor Modules
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Solution Overview
Problem
Existing temperature correction devices for sensor systems struggle to accurately correct measurement errors due to temperature gradients within sensors, especially when environmental temperatures change rapidly, leading to inaccuracies in outdoor infrastructure maintenance applications.
Innovation Solution
A temperature correction device that calculates a correction value based on a temperature gradient value and a correction coefficient, using a product of temperature data from specific periods, and applies this value to correct physical quantity measurements, directly addressing internal temperature gradients and improving measurement accuracy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If temperature correction is performed by estimating the temperature of the physical quantity sensor based on temperature sensor output data, then the correction process is simple, but the measurement precision deteriorates because internal temperature gradients within the sensor cannot be accurately corrected
Solution Approach 1:
The patent segments the temperature correction process into two distinct components: (1) correction for temperature difference between sensors using temperature sensor data, and (2) correction for internal temperature gradients within the physical quantity sensor using gradient detection data. This segmentation allows each correction mechanism to address specific error sources independently, improving overall measurement precision without excessive complexity.
Solution Approach 2:
The patent introduces a gradient detection mechanism as an intermediary element that directly measures temperature gradients within the physical quantity sensor. This intermediary provides real gradient information that mediates between the temperature sensor readings and the actual sensor performance, enabling more accurate correction of internal temperature effects.
2Ease of operation
If temperature correction is performed using only temperature sensor data, then the correction method is simple, but it fails to correct measurement errors caused by rapid temperature changes and internal gradients
Solution Approach 1:
The patent implements a dynamic correction approach where the correction value is continuously updated based on real-time gradient detection data and temperature sensor output. The correction mechanism adapts to rapid temperature changes by detecting gradient variations and adjusting correction values dynamically, rather than using static correction methods.
Solution Approach 2:
The patent employs feedback mechanisms where gradient detection data and temperature sensor readings are fed back into the correction calculation process. This feedback loop allows the system to continuously monitor temperature conditions and adjust correction values accordingly, improving reliability under varying thermal conditions.
Data Source
AI summary
A temperature correction device includes a data acquisition portion that acquires physical quantity data based on an output signal from a physical quantity sensor and temperature data based on an output signal from a temperature sensor, a physical quantity measurement portion that measures a physical quantity detected by the physical quantity sensor based on the physical quantity data, a correction value calculation portion that calculates a correction value based on a product of a temperature gradient value for a first period from a first time to a second time obtained based on the temperature data and a correction coefficient value, and a correction portion that corrects a measurement value of the physical quantity measured by the physical quantity measurement portion based on the correction value.