Ultrasonic Oscillator Frequency Control Using Stored Operating Data

The patent applies preliminary action by storing the operating frequency from the previous operation cycle in a memory device before shutdown. When the system is restarted, this stored frequency value is retrieved and used as the starting frequency, eliminating the need to begin from a fixed frequency far above the operating point. This preliminary preparation of frequency information resolves the contradiction by enabling both reliable operation point achievement and reduced startup time.

The patent implements feedback by continuously monitoring the actual operating frequency and using this information to adjust the starting frequency for the next operation. The microprocessor reads the stored frequency, compares it with system parameters, and determines the appropriate starting frequency accordingly. This feedback mechanism allows the system to adaptively optimize the frequency change range, ensuring reliability while minimizing the time to reach the operating state.

The patent stores the operating frequency information in a memory device during the previous operation, preparing this data in advance for the next startup. This preliminary action eliminates the need to use a conservative starting frequency far above the operating point, allowing the system to begin frequency adjustment from a value much closer to the target. Consequently, both reliable operating point achievement and improved welding productivity are achieved by reducing the frequency sweep duration.

The patent changes the parameter of starting frequency from a fixed value significantly above the operating frequency to a dynamic value based on stored operational data. By retrieving and utilizing the previously stored operating frequency, the system adjusts the starting frequency parameter to be much closer to the target operating point. This parameter change reduces the frequency adjustment range, thereby shortening the time to reach the operating state and improving welding cycle time without compromising operating point accuracy.

The patent employs feedback by continuously monitoring system parameters including temperature and actual operating frequency. The microprocessor reads the stored frequency, compares it with current system conditions, and adjusts the starting frequency determination accordingly. This feedback mechanism enables the system to adapt to temperature variations and operating point changes while still benefiting from the reduced frequency adjustment range, thus maintaining both quick startup and environmental adaptability.

The patent introduces dynamics by making the starting frequency adaptive rather than fixed. The system dynamically adjusts the starting frequency based on stored operational data and current system conditions. This dynamic approach allows the frequency adjustment process to be optimized for each operating cycle, reducing startup time under normal conditions while maintaining the capability to adapt to temperature variations and operating point changes when they occur.