Lasing Device Gas Valve Control for CO2 Laser Stability
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Solution Overview
Problem
Conventional CO2-gas lasing devices require a dedicated release valve and release excess laser medium gas during short stop times, leading to inefficient gas consumption and increased costs due to the need for multiple valves.
Innovation Solution
A lasing device with a gas pressure controller, blower, and current detector that calculates the optimal open time for the gas supply valve based on stop time and blower driving current, allowing precise release of retained gas and reducing the number of valves, thereby minimizing gas consumption and costs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If a dedicated release valve is used to release laser medium gas during stop time, then the mixture ratio stability is improved, but the device complexity and cost increase due to additional valves
Solution Approach 1:
The gas supply valve is designed to perform multiple functions: supplying laser medium gas during operation and releasing retained gas during stop periods. By integrating the release function into the existing gas supply valve, the patent eliminates the need for a separate dedicated release valve, reducing device complexity while maintaining mixture ratio stability through controlled gas release
Solution Approach 2:
The patent combines the gas supply function and gas release function into a single valve system. The gas supply valve serves dual purposes: feeding gas to the optical resonator during lasing operation and releasing retained gas from the piping during stop periods, thereby merging two previously separate functions into one integrated component
2Stability of the object's composition
If the release valve is opened for maximum time to release all retained gas, then the mixture ratio stability is improved, but the gas consumption increases excessively
Solution Approach 1:
The patent employs a feedback control mechanism where the opening duration of the gas supply valve is dynamically adjusted based on stop time detection. The control unit receives feedback about the stop duration and calculates the appropriate valve opening time to release only the necessary amount of retained gas, preventing excessive gas consumption while ensuring mixture ratio stability
Solution Approach 2:
The patent transitions from a static fixed-duration valve opening approach to a dynamic adaptive approach. The valve opening duration is dynamically determined based on the detected stop time, allowing the system to adjust the gas release amount to match the actual needs, thereby reducing waste while maintaining stability
3Ease of operation
If the gas supply valve opening time is fixed, then the control simplicity is maintained, but the adaptation to varying stop times is poor
Solution Approach 1:
The patent implements preliminary detection of stop time before determining the valve opening duration. The control unit detects and records the stop time in advance, then uses this information to calculate and set the appropriate valve opening duration, ensuring the system is prepared and adapted before gas release begins
Solution Approach 2:
The patent changes the operating parameter of valve opening duration based on the detected stop time. Instead of using a fixed parameter, the system dynamically adjusts the valve opening time parameter to match the actual stop duration, enabling adaptation to varying stop times while maintaining straightforward control through automated parameter adjustment
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 device achieves stable laser output by releasing only the required amount of gas, reducing gas consumption and costs while maintaining a stable mixture ratio, even with varying stop times, and utilizing fewer valves.
Implementation Method 1
a blower for circulating the laser medium gas
Implementation Method 2
The gas pressure detector detects the gas pressure of the laser medium gas in the gas circulation path or the optical resonator
Implementation Method 3
The gas release pump releases the laser medium gas from the gas circulation path or the optical resonator via a gas release valve
Data Source
AI summary
Upon starting the lasing device after having a stop state, gas retaining in the gas circulation path and the optical resonator is released through the gas release valve opened by the gas pressure controller. During a time calculated by the open-time calculator in response to the immediately preceding stop time of the lasing device, laser medium gas in the piping between the laser medium gas supply device and the gas supply valve is released, together with the retaining gas, through the gas supply valve opened by the gas pressure controller. The structure reduces costs by using decreased number of valves and suppresses consumption of laser medium gas.