Rotating Bore Measurement Probe with Sensor Correction
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Solution Overview
Problem
Current methods for measuring bores in workpieces are time-consuming, expensive, and prone to errors due to environmental influences, leading to potential misclassification of workpieces with impermissible form errors as usable.
Innovation Solution
A device with a rotatably mounted measuring probe on a holder, equipped with distance sensors and correction means for inclination and misalignment, determines the exact shape and tolerance of bores by calculating the inscribed and enveloping circles, allowing precise measurement of the bore's roundness and shape.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If form measuring devices and/or 3D coordinate measuring machines are used in a laboratory-like measuring room, then measurement precision is improved, but productivity deteriorates and device complexity increases
Solution Approach 1:
The patent replaces complex mechanical form measuring devices and 3D coordinate measuring machines with a simplified measuring probe system that uses electronic sensors (such as capacitive, inductive, or optical sensors) to detect bore geometry. This substitution maintains measurement precision while dramatically reducing measurement time and eliminating the need for laboratory-like environments.
Solution Approach 2:
The invention changes the measurement parameters by using electronic sensor signals instead of mechanical contact methods. The measuring probe incorporates sensors that convert physical bore characteristics into electrical signals for rapid processing, enabling quick acquisition of form accuracy data without the time-consuming mechanical scanning required by traditional devices.
2Productivity
If environmental conditions are not controlled, then productivity is improved, but measurement precision deteriorates
Solution Approach 1:
The patent replaces mechanical measuring systems that are sensitive to environmental conditions with electronic sensor-based measurement. The electronic sensors (capacitive, inductive, or optical) are designed to be environmentally robust, allowing rapid measurements to be taken in normal production environments without temperature control, vibration isolation, or other laboratory-like conditions.
Solution Approach 2:
The measuring probe incorporates self-compensation mechanisms where the electronic sensors automatically adapt to environmental variations. The system performs measurements in real-time without requiring external environmental control, effectively making the measurement process self-sufficient regarding environmental conditions.
3Productivity
If ovality is used instead of roundness, then productivity is improved, but measurement precision deteriorates
Solution Approach 1:
The patent segments the measurement process into multiple angular positions around the bore circumference. The measuring probe takes measurements at numerous discrete angular positions (e.g., every 10 or 15 degrees), allowing calculation of both ovality (maximum and minimum diameters) and detailed roundness information (deviation at each angular position). This segmentation enables comprehensive form analysis without requiring complex single-measurement methods.
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
This approach enables quick, reliable, and accurate measurement of bore shape and tolerance, reducing the risk of misclassifying workpieces and allowing for on-site quality control without the need for laboratory testing.
Implementation Method 1
with at least one distance sensor, with which the instantaneous distance of a reference point of the measuring probe from a wall of the bore can be determined
Data Source
AI summary
The apparatus has measurement probe (10) which is introduced into bore (50). A distance sensor (1,3,5,7,8) is provided with which the instantaneous distance of reference point of the measurement probe from wall of the bore is determined. The measurement probe is rotatably supported at holder (12) which is fixed with respect to the measurement object and/or whose position relative to the measurement object is known. An evaluation device is designed to receive number of sequentially determined distances in the course of rotation of the measurement probe. An independent claim is included for method for industrial measurement of bores in measurement object.