Displacement Measurement Using Optical Storage Code Carrier
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Solution Overview
Problem
Current displacement measurement technologies, particularly optical grating systems, face challenges in achieving high precision and cost-effectiveness due to the need for expensive fabrication and installation of fine grating components, and the obsolescence of optical digital storage methods in data storage applications.
Innovation Solution
A displacement measurement system utilizing an optical storage medium with a code carrier featuring pit lines and bump lines, combined with an optical laser assembly, signal processing unit, and power driver, which scans and decodes the code carrier to generate high-frequency RF signals representing displacement, allowing for precise displacement measurement without the need for diffraction gratings.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If optical grating technology is used for displacement measurement, then measurement precision is improved, but manufacturing cost increases due to expensive fabrication and installation of fine grating components
Solution Approach 1:
The patent applies the copying principle by replacing the complex optical grating structure with a simplified code carrier that contains encoded displacement information. Instead of using physical gratings with precise line spacing that require expensive fabrication, the invention encodes displacement data in a digital code format on a carrier medium, which can be manufactured using standard printing or encoding techniques. The optical laser assembly reads this coded information directly, achieving high measurement precision without the need for costly grating fabrication and installation.
2Quantity of substance
If optical digital storage methods are used, then data storage capacity is improved, but the technology becomes obsolete due to advances in magnetic and solid-state storage
Solution Approach 1:
The patent applies the universality principle by taking the optical storage medium and code carrier technology and repurposing it for a completely different application - displacement measurement. Instead of using optical storage for its original data storage function, the invention uses the same optical reading mechanism and coded carrier structure to encode and read mechanical displacement information. This multi-functional application prevents obsolescence by demonstrating the versatility of optical carrier technology in modern measurement systems.
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 system provides a cost-effective and precise method for displacement measurement, leveraging the advancements in optical storage technologies to enhance measurement accuracy and reliability, potentially replacing outdated optical data storage methods in modern applications.
Implementation Method 1
The optical laser assembly may include a laser diode, an objective lens, coil actuators, and a photo detector with multi photodiodes or light sensitive elements. The composite subsystem can scan and decode the code carrier by focusing a laser beam emitted from the laser diode onto the reflective bumps and pits of the code carrier and reading the reflection of the laser beam using the objective lens and the photo detector.
Implementation Method 2
The composite subsystem can scan and decode the code carrier by focusing a laser beam emitted from the laser diode onto the reflective bumps and pits of the code carrier and reading the reflection of the laser beam using the objective lens and the photo detector. The reflection of the laser beam forms a group of high frequency RF signals which represents the bumps and pits of the code carrier.
Data Source
AI summary
A displacement measuring system is disclosed. The system may implement a code carrier formed from a data storage medium which includes a relative displacement measurement code channel which is an arrangement of pit lines and bump lines. A composite subsystem may include an optical laser assembly, a signal processing unit, and a power driver, and can scan and decode the code carrier by focusing a laser beam on the code carrier and obtaining a group of radio frequency electric signals from the reflection of the laser beam which represents the bumps and pits of the code carrier. A central control and signal output unit can process the electric signals produced by multiple composite subsystems and output information representing incremental and absolute displacement.