Scale Temperature Compensation for Heat Transfer Error
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Solution Overview
Problem
Existing electronic scales with integrated temperature sensors suffer from measurement inaccuracies due to heat absorption or release from objects placed on the scale surface, leading to temperature readings that are higher or lower than the actual temperature.
Innovation Solution
A temperature compensation method using a processor to receive ambient temperatures at different time points, calculate compensation values based on default thresholds, and update a cumulative compensation value to calibrate the target temperature, reducing the impact of heat absorption or dissipation on the scale surface.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the temperature sensor is located at the bottom of the scale surface to enable simultaneous weight and temperature measurement, then usage convenience is improved, but the scale surface absorbs or releases heat from objects placed on it, causing temperature reading errors
Solution Approach 1:
The patent applies preliminary action by performing temperature compensation calculations before final temperature reading is taken. The processor calculates compensation values based on ambient temperature changes detected over time, and applies these compensations to correct the raw temperature sensor readings, thereby eliminating the heat absorption/release error before the final measurement is displayed
Solution Approach 2:
The patent implements feedback by continuously monitoring ambient temperature changes over time and using this information to calculate compensation values. The system tracks temperature variations, computes the difference, and feeds this compensation data back to adjust the final temperature reading, creating a closed-loop system that automatically corrects for heat transfer effects
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 method significantly reduces temperature errors to within ±2 degrees of the actual temperature, ensuring accurate temperature readings by compensating for heat transfer between the scale surface and the object.
Implementation Method 1
the scale surface is likely to absorb or release heat, thereby affecting the measurement accuracy of the temperature sensor
Data Source
AI summary
A temperature compensation method for a weighing device, wherein the scale is provided with a temperature sensor, the method is performed by a processor, and includes, when the scale is powered on: receiving a first ambient temperature from the temperature sensor at a first time point; receiving a second ambient temperature from the temperature sensor at a second time point; obtaining a first compensation value associated to a default temperature threshold and a relationship between the first ambient temperature and the second ambient temperature, and obtaining a cumulative compensation value updated by the default temperature threshold; and obtaining a calibrated target temperature that is a target temperature of a subject sensed by the temperature sensor being calibrated by the cumulative compensation value, wherein the first time point is earlier than the second time point. The present disclosure also provides a weighing device with temperature sensing function.