Nozzle Shaft Filter Checking Using Light Transmission
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Solution Overview
Problem
Existing component mounting devices face challenges in accurately checking the quality of filters inserted in nozzle shafts due to reliance on light reflected from filter surfaces, which can be affected by surface conditions like dirt and color, leading to inconsistent quality assessment.
Innovation Solution
Incorporating a filter state checking portion in the nozzle shaft with through-holes that allow light to pass through in an axially orthogonal direction, enabling the detection of filter quality regardless of surface conditions, combined with a light irradiator and imager for automated detection of filter states.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If light reflection method is used to check filter quality, then the checking method is simple, but the detection accuracy deteriorates due to surface conditions like dirt and color
Solution Approach 1:
The patent replaces the optical reflection-based checking method with a light transmission-based method. By substituting the reflection principle with transmission principle, the system can accurately detect filter insertion quality regardless of surface conditions such as dirt or color variations, thereby improving measurement precision without significantly increasing device complexity
Solution Approach 2:
The patent changes the detection parameter from reflected light intensity to transmitted light intensity. By measuring the amount of light that passes through the filter rather than the light reflected from its surface, the system eliminates the influence of surface conditions on detection accuracy
2Measurement precision
If light transmission method is used to check filter quality, then the detection accuracy improves, but the device complexity increases due to additional components
Solution Approach 1:
The patent designs the light source and sensor to serve multiple functions: the light source provides both illumination for the working environment and test light for filter quality detection, while the sensor detects both component position and filter insertion quality. This multi-functionality reduces device complexity despite implementing the more accurate transmission method
Solution Approach 2:
The system uses its own operational light path to perform the quality check, rather than requiring a separate dedicated testing system. The light that would otherwise be used for component illumination also serves as the test light for filter quality detection, making the system self-sufficient
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 allows for accurate and automated assessment of filter quality, reducing human error and improving detection accuracy, especially when surface conditions are unfavorable, and enabling timely detection of proper, over-inserted, under-inserted, or non-inserted filter states.
Implementation Method 1
a filter state checking portion provided in the side wall so as to face an end of the filter in a properly attached state in an axially orthogonal direction orthogonal to the axial direction of the nozzle shaft. The filter state checking portion is configured to allow light to pass therethrough from a first side to a second side of the nozzle shaft in the axially orthogonal direction according to an inserted state of the filter.
Data Source
AI summary
A component mounting device includes a nozzle shaft. The nozzle shaft includes a filter and a filter state checking portion. The filter state checking portion is configured to allow light to pass therethrough from a first side to a second side of the nozzle shaft in an axially orthogonal direction according to an inserted state of the filter.