3D Sensor Robot Posture Adjustment for Distance Accuracy
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Solution Overview
Problem
Existing three-dimensional sensors have limitations in accurately measuring objects when the distance between the sensor and the measurement target is not within a narrow, predetermined range, particularly when multiple objects overlap, leading to measurement errors.
Innovation Solution
A three-dimensional measurement system that includes a robot, a three-dimensional sensor, and a controller with units for distance measurement, posture setting, and correction, allowing the system to adjust the sensor's position to maintain an optimal distance for accurate measurements by calculating and correcting deviations from a reference distance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a three-dimensional sensor is used to measure the three-dimensional shape of a measurement target, then the shape can be measured, but the measurement accuracy deteriorates when the distance between the sensor and the measurement target is not within a narrow reference range
Solution Approach 1:
The system dynamically adjusts the robot's posture to change the distance between the three-dimensional sensor and the measurement target. The posture adjustment unit modifies the robot's position based on the measured distance, enabling the sensor to maintain an optimal working distance regardless of the initial position of the measurement target, thus resolving the contradiction between measurement precision and distance adaptability
Solution Approach 2:
The system changes the operational parameters by adjusting the robot's posture (position and orientation) to achieve a reference distance between the sensor and the measurement target. This parameter change enables the sensor to operate within its optimal range while accommodating various initial distances, thereby maintaining measurement accuracy across different scenarios
2Measurement precision
If the robot moves the three-dimensional sensor to achieve optimal measurement distance, then measurement accuracy improves, but the system complexity increases
Solution Approach 1:
The robot serves multiple functions: it not only performs the primary task of handling measurement targets but also simultaneously adjusts the sensor's position to achieve optimal measurement distance. This multi-functionality reduces the need for separate mechanisms, thereby improving measurement accuracy without proportionally increasing system complexity
Solution Approach 2:
The system merges the sensor positioning function with the robot's existing movement capabilities. Instead of adding a separate positioning mechanism, the patent combines the sensor adjustment function with the robot's posture control, thereby achieving accurate measurement while minimizing additional system complexity
Data Source
AI summary
The three-dimensional measurement system 1 pertaining to a first embodiment of the present disclosure, whereby the three-dimensional shape of a measurement object can be accurately measured regardless of the position of the measurement object, comprises a three-dimensional measurement unit 32 that measures the position and shape of the measurement object using a three-dimensional sensor 20 that measures a distance to the measurement object, a robot 10 that moves the three-dimensional sensor 20 or the measurement object, a distance measurement unit 33 that measures the distance between the three-dimensional sensor 20 and the measurement object, and a measurement orientation setting unit 34 that sets a measurement orientation of the robot 10 such that the distance between the three-dimensional sensor 20 and the measurement object is a prescribed reference distance on the basis of the distance between the three-dimensional sensor 20 and the measurement object, measured by the distance measurement unit 33.