Dynamic Scanning Range Adjustment in Image Measurement Devices
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Solution Overview
Problem
Conventional image measurement devices are inefficient due to a fixed scanning range in the perpendicular direction, which results in prolonged measurement times when the object-to-be-measured is larger than the imaging device's visual field, requiring a stitching method that involves extensive movement and synthesis of measurement results.
Innovation Solution
The image measurement device employs a preliminary measurement using a camera with a broader visual field to determine the displacement of the object, allowing for a dynamically adjusted scanning range during the main measurement, thereby optimizing the scanning process by setting a narrower scan range based on preliminary measurement data.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a fixed scanning range is used in the perpendicular direction, then the measurement process is simple to control, but the measurement time increases and efficiency decreases
Solution Approach 1:
The scanning range in the perpendicular direction is changed from a fixed predetermined range to a dynamically adjustable range. The arithmetic processing device calculates the actual scanning range based on image information obtained at each measurement position, allowing the scanning range to adapt to the actual object dimensions and features, thereby reducing unnecessary scanning time while maintaining measurement coverage.
Solution Approach 2:
The scanning range parameter is changed from a static fixed value to a dynamic calculated value. By computing the scanning range based on the imaging device's captured image information and the object's displacement, the system optimizes the scanning parameter for each measurement position, achieving faster measurement without sacrificing accuracy.
2Reliability
If the imaging device scans through a fixed predetermined range, then the measurement coverage is guaranteed, but the scanning time increases
Solution Approach 1:
The system performs a preliminary measurement to obtain image information about the object's displacement and dimensions before the main measurement scanning. This preliminary action allows the arithmetic processing device to calculate the optimal scanning range in advance, ensuring that the subsequent scanning process covers the necessary area without wasting time on unnecessary regions.
Solution Approach 2:
The scanning range is dynamically adjusted based on the preliminary measurement results. Instead of using a fixed predetermined range, the system calculates the actual scanning range required to cover the object based on its displacement and imaging characteristics, thereby reducing scanning time while maintaining reliable coverage.
3Area of stationary object
If a stitching method is used for large objects, then the measurement range is extended, but the complexity of movement and synthesis increases
Solution Approach 1:
The scanning range is dynamically calculated based on the object's displacement and the imaging device's capabilities. By adapting the scanning range to the actual object dimensions and position, the system reduces the number of required measurement positions and scanning operations, thereby simplifying the overall measurement process while maintaining the ability to measure large objects.
Solution Approach 2:
The scanning range parameter is dynamically adjusted for each measurement position based on the object's displacement at that position. This dynamic parameter adjustment allows the system to optimize the measurement process for each local region, reducing the total complexity of movement and synthesis while extending the overall measurement range.
Data Source
AI summary
An image measurement device according to the present invention comprises: a stage on which a measurement object is mounted; an imaging device imaging the measurement object for a certain imaging range and outputting image information; a position control device that moves the imaging device to a plurality of measurement positions and scans in a scanning direction; and an arithmetic processing device that calculates a displacement of the measurement object. The imaging device is configured capable of imaging a preliminary measurement range broader than the certain imaging range. The arithmetic processing device, prior to a main measurement that measures the displacement of the measurement object at each measurement position, makes a preliminary measurement based on the image information corresponding to the preliminary measurement range, and sets a scanning range of the imaging device at each measurement position during the main measurement based on a result of this preliminary measurement.