Movable Robot Position Measurement with Imaging-Guided Beam Tracking
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Solution Overview
Problem
Current position measurement technologies for robots and machine tools lack the accuracy and flexibility needed for precise calibration and measurement, especially in dynamic environments, leading to potential errors in processing and assembly tasks.
Innovation Solution
A position measurement device that includes a movement unit, a position measurement unit with an irradiation and light reception system, and an imaging unit, allowing for the precise measurement and adjustment of a reflective element's position by irradiating measurement light, receiving reflected light, and transmitting position information to a control system, enabling accurate calibration and tracking of robotic and machine tool positions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a fixed position measurement system is used, then the system structure is simple, but the measurement accuracy decreases in dynamic environments
Solution Approach 1:
The patent implements a movable position measurement device that can change its position and orientation dynamically. The device includes a movement mechanism with drive units that allow the measurement apparatus to move along rails and adjust its angular position, enabling it to track moving targets and maintain high measurement accuracy in dynamic robotic environments.
Solution Approach 2:
The position measurement device serves multiple functions: it measures position, detects orientation through imaging units, moves to track targets, and provides feedback control. This multi-functional design allows a single device to handle various measurement scenarios, reducing the need for multiple separate systems while maintaining high accuracy.
2Adaptability or versatility
If the measurement device is stationary, then the device structure is simple, but the adaptability to different measurement positions is poor
Solution Approach 1:
The device incorporates multiple drive units that enable dynamic positioning. The first drive unit moves the measurement device along a rail, while the second drive unit adjusts the angular position. This dynamic structure allows the device to adapt to various measurement positions and track moving robotic components effectively.
Solution Approach 2:
The device uses imaging units to detect the position and orientation of reflective elements on robotic components. This detection information is fed back to the control system, which adjusts the movement and orientation of the measurement device to maintain optimal measurement conditions, enhancing adaptability to different positions.
3Adaptability or versatility
If the irradiation direction is fixed, then the device structure is simple, but the measurement coverage is limited
Solution Approach 1:
The irradiation direction is made dynamic through the second drive unit, which rotates the measurement device around a target point. This allows the measurement light to be directed at different angles and positions, significantly expanding the measurement coverage area and enabling the device to track moving robotic components from optimal angles.
Solution Approach 2:
The imaging unit continuously monitors the position of the reflective element, and this information is used to adjust the irradiation direction dynamically. The control system modifies the angle of measurement light irradiation based on real-time position feedback, ensuring the measurement beam remains aligned with the target despite target movement.
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
The solution provides high-accuracy position measurement and calibration of robotic and machine tool components, enhancing the precision and reliability of processing and assembly tasks by continuously adjusting the measurement light direction based on imaging results, thus improving overall system accuracy.
Implementation Method 1
a position measurement unit including an irradiation unit configured to irradiate measurement light to a reflective element arranged on a movable unit of a robot, a light reception unit configured to receive reflected light from the reflective element
Data Source
AI summary
A position measurement device includes a movement device capable of movement, a position measurement unit including an irradiation unit configured to irradiate measurement light to a reflective element arranged on a movable unit of a robot, a light reception unit configured to receive reflected light from the reflective element, a position information acquisition unit configured to acquire position information of the reflective element, and a movement unit configured to change an irradiation direction of the measurement light, an imaging unit, and a transmission unit configured to transmit the position information acquired by the position information acquisition unit or adjustment information of the robot based on the position information to a control system of the robot. The movement device moves at least one of the irradiation unit, the light reception unit, the movement unit, and the imaging unit. The movement unit is controlled so that one or both of at least a part of the robot and the reflective element are imaged using the imaging unit and the measurement light is irradiated to the reflective element on the basis of an imaging result of the imaging unit.