Pressure-Enabled Laser Control Unit for Operator Presence Safety
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Solution Overview
Problem
Laser machining apparatuses lack effective safety measures to prevent operator injury from uncontrolled laser emissions and movements, as existing safety devices can interfere with operations and are not user-friendly.
Innovation Solution
A control device with a box-like body and elastic return means that requires the operator to apply pressure to enable laser emission and movement, switching to an inactive state if pressure is not maintained, ensuring safe operation by preventing uncontrolled movements and emissions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If safety devices are installed to interrupt apparatus operation when operator is absent, then operator safety is improved, but device complexity and operational interference increase
Solution Approach 1:
The control unit is designed to perform multiple functions: it controls the movement mechanism, manages laser emitter operation, and monitors operator presence through the cover panel pressure sensor. By integrating these functions into a single control unit, the patent avoids adding separate safety devices, thus improving operator safety without significantly increasing device complexity.
Solution Approach 2:
The control system automatically monitors operator presence through the pressure sensor on the cover panel and autonomously interrupts operation when the operator is absent. This self-monitoring and self-interrupting capability eliminates the need for additional safety devices, resolving the contradiction between safety and complexity.
2Ease of operation
If control functions are made accessible on movable console, then operator control capability is improved, but risk of uncontrolled activation when operator is absent increases
Solution Approach 1:
The system performs a preliminary check of operator presence through the pressure sensor on the cover panel before allowing control functions to be activated. The control unit only responds to manipulation element inputs when operator presence is confirmed, preventing uncontrolled activation while maintaining ease of operation when the operator is present.
Solution Approach 2:
The pressure sensor provides continuous feedback to the control unit about operator presence. This feedback mechanism ensures that control functions remain accessible and responsive when the operator is present (hand pressing the cover panel) but automatically disable when the operator moves away, thus preventing uncontrolled activation while maintaining operational ease.
3Reliability
If operator must be physically present to control apparatus, then safety from uncontrolled operation is improved, but ease of operation and accessibility are reduced
Solution Approach 1:
The patent replaces the traditional mechanical presence requirement (operator must be physically near the controls) with an electronic detection system using the pressure sensor on the cover panel. The sensor detects operator presence through hand pressure, allowing the operator to control the apparatus from a comfortable distance while still ensuring controlled operation safety.
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 enhances operator safety by ensuring laser emission and movement are only active when the operator is present and controlling the device, preventing accidents and improving ergonomic usability by integrating safety without hindering normal operations.
Implementation Method 1
a control device (5) for the manipulation of a laser emitter (3) and/or a movement mechanism (4)... elastic return means interposed between the supporting base (8) and the cover panel (9)... the cover panel (9) and the supporting base (8) are movable reciprocally towards and away from each other according to external forces applied by the operator (1) on the cover panel (9)
Data Source
AI summary
A laser machining apparatus comprises a workbench for positioning an object to be machined by laser; a laser emitter configured to emit a laser beam transversely to the workbench; a movement mechanism configured to three-dimensionally move the workbench or the laser emitter reciprocally to each other; a control unit connected to the movement mechanism and/or the laser emitter and configured to generate and send an enabling signal according to operator manipulations on a manipulation element connected to the same control unit. In particular, the control unit comprises a box-like body having a supporting base, a cover panel and elastic return means interposed between the supporting base and the cover panel which are movable reciprocally towards and away from each other between an active condition and an inactive condition.