Self-Calibrating Temperature Sensor for Low-Power Precision Sensing
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Solution Overview
Problem
Existing temperature sensors face challenges in achieving high accuracy and reducing power consumption, particularly when used to compensate for temperature-dependent inaccuracies in other sensors like pressure sensors.
Innovation Solution
A temperature sensor system that includes a first and second diode, a control circuit, and a calculation module, which uses a first time interval for calibration based on voltage differences between the diodes and a second time interval for temperature determination using reduced measurement samples, enabling internal calibration and lower power consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If continuous calibration measurements are performed using voltage difference between diodes, then temperature measurement accuracy is improved, but power consumption increases
Solution Approach 1:
The patent implements periodic calibration measurements at predetermined time intervals rather than continuous measurements. The control circuit performs calibration mode measurements to determine calibration values, then switches to operation mode for normal temperature measurements. This periodic approach maintains measurement accuracy while significantly reducing power consumption compared to continuous calibration.
Solution Approach 2:
The patent performs calibration measurements in advance at predetermined time intervals before normal operation requires high precision. By determining calibration values preliminarily and storing them for later use, the system maintains accuracy when needed without continuously consuming power for calibration activities.
2Measurement precision
If calibration is performed externally, then measurement accuracy is improved, but device complexity and calibration process difficulty increase
Solution Approach 1:
The patent enables the temperature sensor to perform self-calibration internally using its own diodes and control circuit. The control circuit switches between calibration mode and operation mode, automatically determining calibration values without external intervention. This self-service approach maintains high measurement accuracy while eliminating complex external calibration equipment and procedures.
Solution Approach 2:
The patent combines the calibration function and measurement function within a single integrated temperature sensor device. The control circuit integrates both calibration mode and operation mode capabilities, merging what would traditionally require separate external calibration equipment and internal sensing components into one unified system.
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 allows for high-accuracy temperature determination with reduced power consumption, facilitating precise temperature compensation in other sensors without external calibration, thus enhancing the performance of devices like pressure and combination sensors.
Implementation Method 1
a temperature-dependent voltage difference between a first temperature-dependent voltage at a first diode of the temperature sensor and a second temperature-dependent voltage at a second diode of the temperature sensor
Data Source
AI summary
In accordance with an embodiment, a device includes an interface configured for obtaining at least one measurement signal from a temperature sensor. In a first time interval the at least one measurement signal comprises information about a temperature-dependent voltage difference between a first temperature-dependent voltage at a first diode of the temperature sensor and a second temperature-dependent voltage at a second diode of the temperature sensor. In a second time interval the at least one measurement signal comprises information about a measurement value of a temperature-dependent voltage at a temperature-dependent electrical component of the temperature sensor.