Position Measurement with Onboard Vibration Frequency Analysis
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Solution Overview
Problem
Position-measuring devices in automation technology, especially in machine tools, face challenges in accurately analyzing mechanical vibrations due to bandwidth constraints of digital interfaces, which affect measurement accuracy and drive control circuits.
Innovation Solution
A position-measuring device equipped with a graduation carrier, position sensors, a processing unit, and a signal analysis unit that analyzes time-varying measurement signals from motion sensors in the frequency domain, using parameters transmitted from subsequent electronics to identify disturbances and optimize system performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If additional sensors and frequency analysis are performed in subsequent electronics, then measurement accuracy and disturbance detection improve, but bandwidth constraints of digital interfaces limit the effectiveness
Solution Approach 1:
The patent performs frequency analysis on measurement signals already within the position-measuring device before transmission to subsequent electronics. This preliminary processing extracts disturbance information from raw signals, converting complex time-domain data into condensed frequency-domain characteristics that can be transmitted within existing bandwidth constraints while preserving essential measurement accuracy information.
Solution Approach 2:
The patent extracts disturbance information from the measurement signals by performing frequency analysis locally within the position-measuring device. This separates the disturbance detection function from the main position measurement data stream, allowing targeted transmission of only the essential disturbance characteristics rather than entire raw signal datasets, thereby overcoming bandwidth limitations.
2Object-affected harmful factors
If mechanical vibrations are analyzed in subsequent electronics, then disturbance detection improves, but device complexity and data transmission requirements increase
Solution Approach 1:
The patent combines the frequency analysis functionality with the existing position-measuring device by integrating a signal analysis unit within the device architecture. This merging of disturbance detection capabilities into the core measurement device eliminates the need for separate external analysis systems, reducing overall system complexity while maintaining effective disturbance detection through local signal processing.
Data Source
AI summary
A position-measuring device includes a graduation carrier having a measuring graduation disposed thereon. At least one position sensor is configured to generate position-dependent measurement signals by scanning the measuring graduation. A processor is configured to process the position-dependent measurement signals into position signals. An interface is configured to transmit the position signals to subsequent electronics via at least one data channel. At least one motion sensor is configured to generate time-varying measurement signals. A signal analyzer is configured to analyze the measurement signals in the frequency domain dependent on parameters that are transmittable from the subsequent electronics to the interface unit, and to produce result data that is transmittable from the interface unit to the subsequent electronics.