Marked Holding Device for Automated Pipette Identification

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Solution Overview

Problem

Current pick and place technologies face challenges in accurately identifying and ensuring the correct type of pipette is used for electronic components, leading to potential component loss and faulty assembly due to the error-prone manual checking of pipette types.

Innovation Solution

A component holding device with a marking on its inner connecting section, which can be recognized by a camera, allows for automatic identification of the pipette type, ensuring the correct type is used for assembly processes without requiring hardware modifications to the placement machine.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If manual checking of pipette types is used, then the operator can verify pipette correctness, but the process is error-prone and time-consuming

Engineering Contradiction:
Improvepipette type verification accuracyVSAvoidtime for manual checking
Core Design Contradiction:
ReliabilityVSLoss of time

Solution Approach 1:

The patent replaces manual visual inspection with an automated optical recognition system. A camera captures images of markings on the pipette magazine plate, and image processing algorithms automatically identify and verify pipette types, eliminating the need for manual checking while improving accuracy and speed.

Inventive Principle:
Principle #28Mechanics substitution (Replace mechanical system)

Solution Approach 2:

The system enables self-verification through automatic identification. The marking on the magazine plate serves as a self-identifying feature that the system reads automatically, allowing the placement machine to verify pipette types without human intervention and continue operations autonomously.

Inventive Principle:
Principle #25Self-service

2Productivity

If automatic recognition by checking pipette length or vacuum values is used, then identification speed improves, but not all pipette types can be distinguished sufficiently

Engineering Contradiction:
Improveidentification speedVSAvoidpipette type differentiation accuracy
Core Design Contradiction:
ProductivityVSMeasurement precision

Solution Approach 1:

The patent uses visual markings (color codes, patterns, or symbols) on the magazine plate that correspond to different pipette types. These markings provide distinct visual identifiers that can be reliably detected by the camera system, enabling precise differentiation between various pipette types based on their assigned marking patterns.

Inventive Principle:
Principle #32Color changes

Solution Approach 2:

The marking on the magazine plate creates a visual copy or representation of the pipette type information. Instead of measuring physical properties of the pipette itself, the system reads this informational copy from the magazine plate, which encodes the pipette type data in a machine-readable visual format.

Inventive Principle:
Principle #26Copying

3Device complexity

If no identification system is used, then the device complexity is low, but component loss and faulty assembly occur due to incorrect pipette usage

Engineering Contradiction:
Improveidentification system complexityVSAvoidassembly correctness
Core Design Contradiction:
Device complexityVSReliability

Solution Approach 1:

The marking is pre-applied to the magazine plate during manufacturing or setup. This preliminary identification information is prepared in advance, allowing the system to verify pipette types before the placement process begins and to detect any mismatches between the marked type and the actual pipette inserted.

Inventive Principle:
Principle #10Preliminary action

Solution Approach 2:

The system provides feedback by comparing the marked pipette type with the actual pipette inserted. If a mismatch is detected, the system can alert the operator or prevent operation, creating a feedback loop that ensures only correct pipettes are used, thereby improving assembly reliability.

Inventive Principle:
Principle #23Feedback

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 solution provides a reliable and efficient method for identifying the type of holding device, reducing errors and ensuring the correct pipette is used, thus improving the accuracy and reliability of the assembly process.

Implementation Method 1

If the tip of a pipette touches an electronic component, the resulting negative pressure (often also referred to as vacuum) causes it to adhere to the end of the pipette and it can be transported.

Methodology Applied
Scientific EffectNegative pressure (vacuum): Vacuum

Data Source

PatentEP2579700B1Construction element holding device with marking applied to an inner wall
Publication Date: 2016.04.06 ASM ASSEMBLY SYST GMBH & CO
  • EP2579700B1 patent drawingFigure 1
  • EP2579700B1 patent drawingFigure 2a~3

AI summary

The device (220b) has a connecting portion (221) including a cavity (222) in which an assembly head is attached. A tip portion (227) connected to the connecting portion includes a suction channel (228) formed along a longitudinal axis (220a) of the holding device, where the suction channel is in fluid communication with the cavity of the connecting portion. The tip portion includes a contact surface (227a) to hold an electronic component on an inner wall (222a) of the cavity, where the contact surface includes a mark (225) that denotes the type of the holding device. Independent claims are also included for the following: (1) a method for identifying the type of the holding device (2) a computer program for identifying the type of the holding device.