Ultrasonic Atomizer Circuit for Resonant Frequency Detection
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing methods for determining the resonant frequency of ultrasonic atomization pieces in ultrasonic atomizers are costly and complex, hindering cost savings and miniaturization, and are prone to inefficiencies due to shifts in resonant frequency caused by temperature, environment, and component aging.
Innovation Solution
An ultrasonic atomizer with a control circuit that includes a controller, a driving branch, and an impedance branch with a capacitor, allowing for the determination of resonant frequency by measuring the voltage at the ultrasonic atomization piece, using a simple circuit structure to reduce costs and achieve miniaturization.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If phase detection means is used to determine resonant frequency by collecting voltage and current and comparing phase relationship, then resonant frequency can be determined accurately, but costs increase, circuits become complex, and implementation difficulty increases
Solution Approach 1:
The patent extracts only the voltage parameter from the traditional phase detection method that uses both voltage and current. By removing the current collection and phase comparison components, the circuit is simplified while still enabling resonant frequency determination through voltage alone, thus reducing circuit complexity while maintaining the core functionality
Solution Approach 2:
The patent replaces expensive and complex phase detection circuits with a simpler, more cost-effective voltage detection approach. The simplified circuit uses basic voltage division and rectification components rather than complex phase-locked loops or synchronous detection circuits, reducing overall system cost and implementation difficulty
2Measurement precision
If phase detection means with voltage and current collection is used, then resonant frequency can be determined, but costs are relatively high and miniaturization is difficult to achieve
Solution Approach 1:
The patent removes the current sensing components and phase comparison circuitry from the design, extracting only the essential voltage measurement function. This reduction in component count and circuit complexity directly enables smaller form factors and easier integration into compact devices, facilitating miniaturization while preserving resonant frequency determination capability
Solution Approach 2:
The simplified voltage detection circuit serves multiple functions: it determines resonant frequency, provides feedback for frequency adjustment, and can be integrated into various ultrasonic device configurations. This multi-functionality reduces the need for separate dedicated circuits, supporting miniaturization efforts
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 method enables accurate determination of resonant frequency with a simpler circuit, reducing costs and facilitating miniaturization while maintaining practicality and efficiency.
Implementation Method 1
an ultrasonic atomization piece, configured to generate oscillation to atomize the atomization matrix
Implementation Method 2
the impedance branch is configured to match a combined impedance of the impedance branch and the ultrasonic atomization piece with an impedance of the driving branch, and the impedance branch includes a first capacitor connected in parallel to the ultrasonic atomization piece
Implementation Method 3
the controller is configured to obtain a first voltage of the ultrasonic atomization piece, and determine a resonant frequency of the ultrasonic atomization piece according to the first voltage
Data Source
AI summary
An ultrasonic atomizer, and a resonant-frequency determination method based on the ultrasonic atomizer are provided. The ultrasonic atomizer includes a storage cavity, an ultrasonic atomization piece, a control circuit and a power supply. The storage cavity stores an atomization matrix. The ultrasonic atomization piece generates oscillation to atomize the atomization matrix. The control circuit includes a controller, a driving branch and an impedance branch, the driving branch is connected to the power supply and the controller, the driving branch generates a driving voltage in response to a first pulse signal; the impedance branch is connected between the driving branch and the ultrasonic atomization piece, the impedance branch makes a combined impedance of the impedance branch and the ultrasonic atomization piece match the impedance of the driving branch.