Dynamic Ultrasonic Generator for Rapid Load Matching
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Solution Overview
Problem
Traditional ultrasonic generators for ultrasonic spray systems require long time to achieve frequency lock and cannot dynamically adjust to changing load conditions, such as impedance and frequency, leading to suboptimal atomization performance.
Innovation Solution
A dynamic ultrasonic generator that includes a microcontroller and amplifier to control output power, allowing for rapid adjustment to changing load conditions through a load leveling operating mode, which matches output power fluctuations with nozzle load changes, and automatically switches to higher potential output when impedance exceeds a threshold.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional analog electronic driving circuits are used to deliver constant power to the ultrasonic nozzle, then the system provides stable operation, but the frequency lock time is long (500 milliseconds or longer) and the system cannot dynamically react to changing load conditions
Solution Approach 1:
The patent applies dynamics by transitioning from static constant power delivery to dynamic adaptive power control. The microcontroller continuously monitors nozzle impedance and adjusts drive power in real-time, enabling the system to quickly respond to changing load conditions while maintaining stable operation. This dynamic adjustment reduces frequency lock time significantly compared to traditional analog circuits.
Solution Approach 2:
The patent implements feedback by using a microcontroller to continuously monitor the actual impedance and frequency of the ultrasonic nozzle, then adjusts the drive signal accordingly. This closed-loop control system compares the actual nozzle conditions with target values and makes real-time corrections, enabling fast frequency lock and optimal atomization performance under varying conditions.
2Device complexity
If traditional analog driving circuits are used, then the system structure is simple, but the system cannot dynamically adjust to changing load conditions such as impedance and frequency variations
Solution Approach 1:
The patent replaces traditional analog electronic driving circuits with a digital control system based on a microcontroller. This substitution enables sophisticated digital signal processing and adaptive control algorithms that can dynamically adjust to changing load conditions, while the integrated nature of modern microcontrollers keeps the overall system complexity manageable.
Solution Approach 2:
The microcontroller-based system provides multi-functionality by handling frequency detection, impedance monitoring, power adjustment, and atomization control within a single integrated platform. This universal approach allows the system to adapt to various nozzle types and operating conditions without requiring separate specialized circuits for each function.
3Ease of operation
If constant power is delivered to the ultrasonic nozzle, then the system operation is simple, but atomization performance is suboptimal when load conditions change
Solution Approach 1:
The system transitions from static constant power operation to dynamic adaptive power control. The microcontroller continuously adjusts drive power based on real-time impedance monitoring, ensuring optimal atomization performance across varying load conditions while maintaining ease of operation through automated control.
Solution Approach 2:
The patent applies parameter changes by dynamically adjusting the drive signal parameters (amplitude, frequency, phase) based on monitored nozzle conditions. This allows the system to optimize atomization performance by adapting key parameters to match actual operating conditions, rather than relying on fixed constant power delivery.
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
Enables quick and stable adjustment to varying nozzle conditions, achieving optimal atomization performance by reducing frequency lock time to less than 10 milliseconds, crucial for high-speed and precision spraying applications.
Implementation Method 1
the use of piezo-electric transducers configured to convert the input of an alternating or time-varying signal to a mechanical resonance in the subassembly
Implementation Method 2
An ultrasonic atomizer nozzle can change a stream of liquid to a plume of dispersed droplets
Implementation Method 3
The droplet size is based on the resonant frequency of the nozzle and certain properties of the liquid
Data Source
AI summary
An ultrasonic generator is provided. The ultrasonic generator includes an amplifier for outputting a drive signal to an ultrasonic atomizing nozzle, and a microcontroller, coupled to the amplifier, to control an output power of the amplifier. The microcontroller includes a load leveling operating mode in which the output power of the amplifier fluctuates to match changing load conditions of the ultrasonic atomizing nozzle.