Digital Scale Calibration Using AD Conversion Values
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Solution Overview
Problem
Conventional digital scales fail to accurately account for environmental factors, leading to inaccurate measurements due to inadequate calibration, which affects user experience and measurement precision.
Innovation Solution
A method for calibrating digital scales involves acquiring AD conversion values for a reference object before and at zero weight, calculating a target AD conversion value per unit weight, and adjusting this value to ensure accurate weight measurements by using a reference object with a known weight, either manually input or transmitted via a terminal device, and implementing a warning system for significant discrepancies during calibration.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If conventional digital scales perform measurements without adjusting to environmental factors, then the device complexity is low, but the measurement precision deteriorates
Solution Approach 1:
The patent applies preliminary action by performing calibration operations before actual weight measurements. The system acquires AD conversion values for reference objects and zero-weight states in advance, calculates target AD conversion values per unit weight, and stores these calibration parameters for subsequent measurements. This preliminary calibration process accounts for environmental factors and ensures accurate measurements without requiring complex real-time adjustments during weighing operations.
2Measurement precision
If digital scales use fixed AD conversion values without calibration, then the ease of operation is high, but the measurement precision deteriorates
Solution Approach 1:
The patent implements self-service by enabling the digital scale to automatically perform calibration operations. The system autonomously acquires AD conversion values for reference objects and zero-weight states, calculates target AD conversion values per unit weight, and updates its internal calibration parameters without requiring manual intervention. This self-calibration mechanism maintains ease of operation while significantly improving measurement precision through adaptive environmental compensation.
3Reliability
If digital scales do not account for environmental factors, then the device complexity is low, but the reliability deteriorates
Solution Approach 1:
The patent applies parameter changes by dynamically adjusting AD conversion values based on environmental conditions. The system measures environmental factors such as temperature and humidity, acquires corresponding AD conversion values for reference objects under these conditions, and calculates updated target AD conversion values per unit weight. This parameter adaptation ensures measurement consistency and reliability while avoiding the need for complex multi-parameter environmental compensation systems.
Data Source
AI summary
A method of calibrating a digital scale includes the steps of: (101) acquiring a first AD conversion value by the digital scale, the first AD conversion value corresponding to a weight of a reference object gathered before calibration; (102) acquiring a second AD conversion value by the digital scale, the second AD conversion value corresponding to a value when the digital scale has a weight reading of 0; (103) acquiring a target weight of a reference object; and (104) ascertaining a target AD conversion value per unit weight by reference to the first AD conversion value, the second AD conversion value and the target weight of the reference object, the target AD conversion value per unit weight being arranged to measure a weight of an object by the digital scale after calibration.