Position Measuring Device Self-Calibration for Assembly Tolerance Errors
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Solution Overview
Problem
Mechanical manufacturing tolerances in position measuring devices, particularly those with manually assembled components, lead to inaccuracies and errors in the relative position between code and receiving areas, affecting signal quality and accuracy.
Innovation Solution
A method for calibrating position measuring devices by detecting absolute and relative position signals, calculating correction values based on signal changes, and using these values to correct measurement inaccuracies, allowing for self-calibration without additional tools.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If manually assembled components are used in position measuring devices, then manufacturing flexibility and adaptability are improved, but manufacturing precision and measurement accuracy deteriorate due to mechanical tolerances
Solution Approach 1:
The calibration method performs preliminary detection and correction of position inaccuracies caused by mechanical tolerances. By detecting absolute position signals and relative position signals, and calculating correction values before actual measurement operations, the system compensates for assembly errors in manually assembled components, thereby maintaining both manufacturing flexibility and measurement precision.
Solution Approach 2:
The invention changes the parameter of position measurement by introducing correction values that adjust the measured position data. The correction value is calculated based on the difference between absolute position signals and relative position signals, effectively transforming the measurement parameters to compensate for mechanical tolerances in manually assembled components.
2Measurement precision
If traditional calibration methods with additional tools and reference encoders are used, then measurement precision is improved, but device complexity and manufacturing costs increase
Solution Approach 1:
The position measuring device performs self-calibration using its own internal components (transmitting area, receiving area, and code area) without requiring external reference encoders or additional calibration tools. The device detects its own position signals and calculates correction values autonomously, thereby maintaining high measurement precision while reducing device complexity and manufacturing costs.
Solution Approach 2:
The transmitting and receiving areas serve multiple functions: they are used both for normal position measurement operations and for calibration processes. The same hardware components detect both absolute position signals and relative position signals, eliminating the need for separate calibration equipment and reducing overall system complexity while maintaining calibration accuracy.
3Measurement precision
If high-precision mechanical assembly is implemented to reduce tolerances, then measurement accuracy is improved, but manufacturing costs and production time increase
Solution Approach 1:
The calibration process performs preliminary detection and correction of position inaccuracies caused by mechanical tolerances. By detecting absolute position signals and relative position signals, and calculating correction values before actual measurement operations, the system compensates for assembly errors in manually assembled components, thereby maintaining both manufacturing flexibility and measurement precision.
Solution Approach 2:
The invention changes the parameter of position measurement by introducing correction values that adjust the measured position data. The correction value is calculated based on the difference between absolute position signals and relative position signals, effectively transforming the measurement parameters to compensate for mechanical tolerances in manually assembled components.
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
Enables precise and efficient calibration of position measuring devices, reducing manufacturing costs and enabling continuous monitoring and anticipation of component deterioration, thus preventing failures.
Implementation Method 1
the transmission area has one or more light-emitting elements, such as light-emitting diodes, and the reception area, which can also be referred to as the detection area, has one or more light-receiving elements, such as photodiodes
Data Source
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AI summary
Method for calibrating a position measurement device, comprising the steps of acquiring an initial absolute position signal, acquiring an initial value of a relative position signal upon an initial change of the initial absolute position signal, calculating an initial correction value based on the initial value of the relative position signal, and using the initial correction value to correct a position measurement of the device.