Laser Processing Head Shutter Sensing for Safe Mode Switching
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Laser processing devices face increasing safety requirements due to the need for accurate detection of shutter positions, as existing systems lack reliable methods to ensure the proper actuation of shutters during processing, viewing, and measuring modes.
Innovation Solution
A laser processing device and head are designed with a configuration that includes a processing laser light source, a viewing laser light source, optical components, scanners, light receiving portions, and sensors to detect the positions of shutters, using four sensors to determine if the shutters are in normal operational states, ensuring accurate detection across different modes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple sensors are added to detect shutter positions accurately, then safety is improved, but device complexity increases
Solution Approach 1:
The shutter detection system is segmented into multiple independent sensors: a first sensor detects the first shutter position, a second sensor detects the second shutter position, and a third sensor detects the light receiving element position. This segmentation allows each sensor to independently monitor specific components, improving overall system reliability without requiring a single complex detection mechanism.
Solution Approach 2:
The control unit acts as an intermediary that receives detection results from multiple sensors and integrates this information to determine overall system safety. The control unit processes sensor signals, compares them against expected states, and makes safety determinations based on the combined information, thereby managing the complexity of multiple sensors through centralized intelligence.
2Measurement precision
If four sensors are used to detect shutter positions in all modes, then measurement precision is improved, but use of energy increases
Solution Approach 1:
The sensor activation strategy is made dynamic by adapting the number of active sensors to the current operational mode. In processing mode where both shutters should be open, both first and second sensors are activated. In viewing mode where the first shutter should be closed, only the first sensor is activated. This dynamic adaptation reduces energy consumption while maintaining detection precision for the relevant shutters in each mode.
Solution Approach 2:
The system changes the operational parameter of sensor activation based on the operational mode. The control unit modifies which sensors are active depending on whether the system is in processing, viewing, or measuring mode, thereby optimizing energy consumption while maintaining adequate detection accuracy for the current operational context.
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
The solution accurately detects the positions of the shutters in processing, viewing, and measuring modes, enhancing safety by issuing warnings and preventing laser emission when shutters are not in expected positions, thus ensuring proper operation and safety.
Implementation Method 1
a first closing sensor that detects that the first shutter is located in the closed position, a first opening sensor that detects that the first shutter is located in the open position
Implementation Method 2
a second closing sensor that detects that the second shutter is located in the closed position, a second opening sensor that detects that the second shutter is located in the open position
Implementation Method 3
an optical component that splits the processing laser light into first split light and second split light
Data Source
AI summary
A laser processing device comprises: a first shutter that shifts between a closed-state position for blocking a laser beam and an open-state position for allowing the laser beam to pass; a second shutter that shifts between a closed-state position for blocking laser beams and an open-state position for allowing the laser beams to pass; a first closed-state sensor that detects that the first shutter is disposed at the closed-state position; a first open-state sensor that detects that the first shutter is disposed at the open-state position; a second closed-state sensor that detects that the second shutter is disposed at the closed-state position; and a second open-state sensor that detects that the second shutter is disposed at the open-state position.