Laser Auto-Alignment for Robotic Arms in Lab Automation
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Solution Overview
Problem
Manual alignment of robotic arms in Laboratory Automation Systems is a slow, costly, and error-prone process, especially in complex systems with multiple arms, which requires extensive time and increases the risk of incorrect alignment.
Innovation Solution
A laser-based auto-alignment system that uses a gripper unit to grip a laser sensor tool to identify landmarks on the work surface, allowing the robotic arm to be automatically calibrated and aligned in the X-Y plane and Z-axis, utilizing the gripper's normal functions and avoiding the need for manual modification of the gripper unit.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If manual alignment is used to align robotic arms, then alignment can be performed with simple equipment, but the process is slow and time-consuming
Solution Approach 1:
The patent replaces manual mechanical alignment operations with an automated optical measurement system. A laser sensor tool emits laser beams to detect landmarks on the work surface, and a controller automatically calculates alignment parameters and adjusts robotic arm positions, eliminating the need for manual measurement and adjustment operations.
Solution Approach 2:
The system enables self-alignment by having the robotic arm itself perform the alignment operations. The gripper unit, which is part of the robotic arm, grips the laser sensor tool and executes alignment movements under automated control, allowing the system to align itself without external manual intervention.
2Reliability
If manual alignment is performed by service technicians, then alignment can be adjusted flexibly, but human error increases and consistency decreases
Solution Approach 1:
The system incorporates feedback through the laser sensor tool that detects landmark positions on the work surface. The controller receives measurement data from the laser sensor, compares it with target positions, and automatically adjusts the robotic arm to achieve precise alignment, ensuring consistent and accurate results through closed-loop control.
Solution Approach 2:
Manual measurement and judgment are replaced with automated optical measurement using laser beams. The laser sensor provides objective, repeatable measurements of landmark positions, eliminating variability introduced by different technicians and ensuring consistent alignment precision across multiple installations.
3Productivity
If multiple robotic arms are aligned manually, then each arm can be individually adjusted, but the process becomes extremely time-consuming and costly
Solution Approach 1:
The laser sensor tool serves multiple functions: it can be gripped by any robotic arm's gripper unit, used to detect landmarks on the work surface, and employed for aligning multiple different robotic arms. This universal tool enables standardized alignment procedures across multiple arms, significantly improving throughput while managing complexity through reuse of the same equipment.
Solution Approach 2:
Each robotic arm performs its own alignment operations by gripping and positioning the laser sensor tool itself. This self-service capability allows multiple arms to be aligned in sequence or parallel without requiring separate alignment equipment for each arm, improving productivity while keeping the overall system relatively simple.
4Adaptability or versatility
If the gripper unit is modified for alignment operations, then alignment capability is enhanced, but the gripper's normal functions may be compromised
Solution Approach 1:
The laser sensor tool is designed to be compatible with standard gripper units, allowing the gripper to perform both its normal gripping functions and the alignment function of holding the laser sensor. The tool can be easily gripped and released, enabling the gripper to switch between sample handling and alignment operations without modification, maintaining full operational versatility.
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 laser-based auto-alignment system significantly reduces the time and risk of human error in aligning robotic arms, enabling precise alignment of multiple arms in a Laboratory Automation System, ensuring accurate gripping and handling of samples without damaging them.
Implementation Method 1
a laser sensor tool, comprising a laser emitter and detector element
Implementation Method 2
laser sensor tool, comprising a laser emitter and detector element can be gripped by a gripper unit
Data Source
AI summary
In a laser-based alignment system, a laser sensor tool, comprising a laser emitter and detector element can be gripped by a gripper unit of a robotic arm and used to automatically align the robotic arm with a work surface. A landmark on the work surface can be identified by scanning the work surface with the laser sensor in an X-Y plane. A center point of the landmark in the X-Y plane can be determined to align the gripper unit with the work surface in the X-Y plane. The robotic arm can be calibrated on a Z-axis by moving the gripper downward in a z-direction until the gripper unit contacts the work surface.