Laser Scanning Control Chip for Synchronized Galvanometer Signals
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Solution Overview
Problem
Conventional laser scanning control systems experience signal crosstalk and instruction transmission errors due to separated movement control cards and galvanometer drivers, leading to inefficient and non-real-time control, especially in high-performance applications.
Innovation Solution
A system on chip structure integrates galvanometer movement and laser control functions, eliminating the need for signal transmission cables by processing graphic data to generate synchronized galvanometer and laser instructions within a single chip, enabling real-time, high-performance control.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the movement control card and galvanometer driver are separated, then the system can be modular and easier to manufacture, but signal crosstalk and instruction transmission errors occur
Solution Approach 1:
The patent integrates the movement control card and galvanometer driver into a single integrated control card. The movement control card includes both the movement control module that generates galvanometer drive signals and the galvanometer driver module that amplifies these signals, eliminating the need for separate cables and reducing signal crosstalk and transmission errors while maintaining manufacturing feasibility through integration.
2Device complexity
If data is transmitted unidirectionally, then the system structure is simpler, but the system status cannot be obtained and open loop control is used
Solution Approach 1:
The patent implements a bidirectional communication mechanism where the integrated control card not only sends control instructions to the galvanometer and laser but also receives feedback information from these components. The feedback information includes the actual position of the galvanometer mirror and the working status of the laser, enabling closed-loop control that improves positioning accuracy and system reliability while maintaining manageable complexity through the integrated architecture.
3Ease of repair
If the control system uses separate components, then the system is easier to repair, but control efficiency is reduced in high performance applications
Solution Approach 1:
While integrating the control card, the patent maintains functional segmentation within the integrated circuit, with distinct movement control modules, galvanometer driver modules, and laser control modules. This modular integration allows for efficient real-time control with reduced signal transmission delays while preserving the ability to replace or repair specific functional modules without replacing the entire control card, thus balancing repairability with high control efficiency.
Data Source
AI summary
A laser scanning device (10), comprising: a system on chip structure (110) configured to receive and process a graphic data transmitted by an external computer (20) to generate a galvanometer movement instruction and a laser control instruction; and galvanometer (120) configured to receive the galvanometer movement instruction and move according to the galvanometer movement instruction; wherein the laser control instruction is transmitted to an external laser (30), so that the laser (30) and the galvanometer (120) move synchronously. The above laser scanning device (10) and scanning system can integrate a laser control function and a galvanometer control function into the same chip by a system on chip design, which does not only reduce cost of the system, but also improve reliability of the system. Because all information are transmitted in the same one chip, there is no signal transmission cable employed between a conventional movement control card and a galvanometer driver, which results in a better real time, and avoids various problems due to transmission from the conventional control card to the galvanometer.