Temperature Sensor Compensation for Portable Devices
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Solution Overview
Problem
Portable electronic devices face inaccuracies in temperature measurements due to internal heat sources and environmental changes, such as sunlight exposure and handling, which existing compensation methods fail to fully address.
Innovation Solution
A portable electronic device with integrated temperature sensors and a compensator that adjusts its mode based on environmental and handling changes, using additional sensors like brightness, IR, and motion sensors to apply corrections through heat and dynamic models, ensuring accurate temperature readings.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a temperature sensor is integrated into a portable device, then temperature measurement is enabled, but measurement accuracy deteriorates due to internal heat sources and environmental changes
Solution Approach 1:
The patent divides the compensation task into separate modules: a heat compensator for internal heat source compensation and a dynamic compensator for environmental change compensation. This segmentation allows each compensator to specialize in specific error types, improving overall measurement accuracy while managing complexity systematically.
Solution Approach 2:
The patent implements feedback mechanisms where sensors detect environmental changes (sunlight exposure, wind, handling) and this information feeds back to the compensator to adjust the temperature reading. The system continuously monitors environmental conditions and dynamically adjusts compensation parameters to maintain accuracy despite changing conditions.
2Measurement precision
If compensation models are used to correct temperature readings, then measurement accuracy improves, but device complexity increases
Solution Approach 1:
The compensator system is designed to handle multiple types of errors through a unified architecture. The same compensator framework accommodates both heat source compensation and environmental change compensation by switching between different compensation modes, reducing the need for separate dedicated systems for each correction type.
Solution Approach 2:
The patent employs dynamic compensation where the compensator adapts its behavior based on real-time environmental conditions. The system transitions between different compensation modes (e.g., heat compensator mode, dynamic compensator mode) depending on detected conditions, allowing the system to use appropriate complexity levels for each situation rather than maintaining maximum complexity continuously.
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
The solution significantly improves the accuracy of temperature measurements by dynamically compensating for environmental and handling-induced errors, providing a more precise ambient temperature reading.
Implementation Method 1
one or more integrated temperature sensors for measuring an ambient temperature
Implementation Method 2
measuring the temperature using such a device
Implementation Method 3
a heat compensator used to apply a correction based on a model of the heat flow between the sensor and internal active components generating heat when in use
Implementation Method 4
a dynamic compensator used to apply a correction based on a model of the response of the sensor during a temperature change
Data Source
AI summary
There is provided a portable electronic device with one or more integrated temperature sensors (12) for measuring an ambient temperature, a compensator (25,26) for reducing the difference between a sensor output (Ts) and the ambient temperature (Ta) with the compensator (25,26) switching depending on environmental and/or handling conditions between a plurality of compensation modes selected dependent on measurements of one or more other integrated and/or external sensors.