Rail Inspection Wheel Assembly for Automated Alignment Measurement
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Solution Overview
Problem
Existing rail inspection methods in semiconductor production plants suffer from unreliable measurements due to worker variability and prolonged inspection times, leading to decreased productivity.
Innovation Solution
A rail inspection device equipped with drive parts, side and upper wheels, inclination and step sensors, and a processor to ensure precise measurement of rail alignment, width, and presence of protrusions, providing automated and reliable inspection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a worker directly measures the installation state of the rail using a measuring machine, then the inspection can be performed, but the measured values may vary according to the worker leading to decreased reliability
Solution Approach 1:
The inspection device performs self-measurement of rail installation parameters including step difference, width, and inclination through integrated sensors (step sensor, width sensor, inclination sensor) without requiring worker intervention. The device automatically compares measured values against design specifications and generates inspection reports, eliminating human variability in measurement and ensuring consistent, reliable inspection results.
2Productivity
If a worker manually measures the rail installation parameters, then the inspection can be completed, but the inspection time becomes longer causing decreased productivity
Solution Approach 1:
The inspection device continuously measures multiple rail installation parameters (step difference, width, inclination) simultaneously as it moves along the rail system. The integrated sensor system operates without interruption, automatically comparing real-time measurements against design specifications and generating instant pass/fail determinations, thereby reducing inspection time and increasing productivity compared to manual measurement processes.
3Reliability
If multiple sensors are integrated into the drive part to measure various installation parameters, then the inspection reliability is improved, but the device complexity increases
Solution Approach 1:
The step sensor, width sensor, and inclination sensor are integrated into a single drive part assembly that moves together along the rail. This merged configuration allows simultaneous measurement of multiple installation parameters (step difference, width, inclination) using one coordinated unit rather than separate independent devices, reducing overall system complexity while maintaining comprehensive inspection coverage and high reliability.
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
Enhances inspection reliability and efficiency by reducing human error and shortening inspection times, thereby improving productivity in rail installation verification.
Implementation Method 1
an inclination sensor provided on the upper surface of the drive part and configured to measure an inclination of the body
Implementation Method 2
a step sensor provided on a front surface of the drive part and configured to measure a distance to the lower rail from the step sensor in the third direction using a second laser
Implementation Method 3
a width measurement sensor provided on a rear surface of the drive part and configured to measure a distance to the lower rail from the width measurement sensor in the second direction using a first laser
Data Source
AI summary
A rail inspection device is provided. The rail inspection device includes: a drive part configured to drive on a lower rail; side wheels configured to rotate such that the drive part moves in a first direction on the lower rail, wherein the side wheels are provided on two side surfaces of the drive part opposite to each other in a second direction that intersects the first direction; upper wheels provided on an upper surface of the drive part and configured to rotate in contact with a branch guide rail provided above an upper portion of the drive part; a body connected to a lower surface of the drive part in a third direction that is perpendicular to the first direction and the second direction; and an inclination sensor provided on the upper surface of the drive part and configured to measure an inclination of the body.