Coordinate Measuring Sensor Data Synchronization
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Solution Overview
Problem
Existing methods for generating positional sensor data in coordinate measuring devices face inaccuracies, especially when the sensor is accelerated at the time of trigger signal generation, as they assume all image elements are captured simultaneously and often lack timestamps, leading to reduced quality of position assignment and evaluation.
Innovation Solution
A method and apparatus that generate sensor data points and position data points, synchronized by a trigger signal with a specific frequency, allowing for accurate assignment of position data to sensor data based on shared or specific timestamps, and optionally using interpolation for accurate positioning even when data points are not captured simultaneously.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If trigger signals are used to synchronize sensor data with position data, then the assignment of position to sensor data can be performed, but inaccuracies occur when the sensor is accelerated at the time of trigger signal generation
Solution Approach 1:
The patent applies preliminary action by determining movement information (velocity, acceleration) before the trigger signal is generated. This allows the system to predict the sensor position at the exact moment of image capture, rather than relying on the position at trigger signal generation. By performing this movement analysis in advance, the system compensates for acceleration effects and achieves accurate position assignment even during dynamic movement.
Solution Approach 2:
The patent implements feedback by using determined movement information to correct the assigned position data. The system continuously monitors sensor movement, calculates velocity and acceleration, and uses this feedback to adjust the position assignment. This closed-loop approach ensures that even if the sensor accelerates between trigger signal and image capture, the final position assignment remains accurate through iterative correction.
2Device complexity
If all image elements are assumed to be captured at the same time, then the synchronization process is simplified, but measurement accuracy is reduced when individual image elements have different capture times
Solution Approach 1:
The patent applies segmentation by dividing the image data into individual image elements (pixels or pixel groups), each with its own capture time stamp. Instead of treating the entire image as captured simultaneously, the system processes each element separately, assigning the correct position based on its specific capture time. This segmentation allows accurate position assignment for each element while maintaining manageable complexity through automated processing.
Solution Approach 2:
The patent introduces a time dimension to the traditional spatial image data. By adding capture time information as a fourth dimension, the system can accurately correlate each image element with the sensor position at that specific moment. This temporal dimensionality transformation enables precise position assignment without oversimplifying the capture process, resolving the contradiction between complexity and accuracy.
3Device complexity
If timestamps are not included in sensor data records, then data processing is simpler, but the quality of position assignment is reduced
Solution Approach 1:
The patent implements self-service by automatically generating and processing time stamp information without requiring manual intervention. The system autonomously captures timing data for each sensor reading, automatically correlates it with position data, and performs the necessary calculations. This self-service approach maintains data processing simplicity while ensuring high position assignment quality, as the automated process eliminates human error and consistently applies the correct timing correlations.
Data Source
AI summary
A method and an apparatus for generating positional sensor data of a coordinate measuring device are provided. A sensor generates sensor data points and a trigger signal with a trigger frequency. A sensor data record is generated which includes the sensor data points and a sensor data time. The trigger signal is transmitted to a device for determining a sensor position, a position data record is determined upon or after the reception of the trigger signal, the position data record includes at least one position data point and one position data time, an assignment of position data points to sensor data points is determined depending on the sensor data time and the position data time, and a positional sensor data record is generated which includes at least one sensor data point and a position data point assigned to this sensor data point.