Ultrasonic Atomizer Impedance Identification by Resonance Current
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Solution Overview
Problem
Ultrasonic atomizers exhibit significant variations in atomization performance due to differences in electrical characteristics of ultrasonic atomization sheets, which are often addressed by complex and costly methods involving direct digital frequency synthesis (DDS) algorithms and phase detection circuits, making them impractical for widespread use.
Innovation Solution
An impedance identification method for ultrasonic atomizers that determines the impedance interval of the atomization sheet by measuring the current output at resonance frequency and matching it with preset impedance intervals, using a simpler circuit structure to reduce costs and improve practicality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If complex methods involving DDS algorithms and phase detection circuits are used to identify impedance, then measurement precision is improved, but device complexity and cost increase
Solution Approach 1:
The patent extracts only the essential measurement function from the complex DDS and phase detection system, using a simple current measurement at resonance frequency to identify impedance. This eliminates unnecessary complex circuits while retaining the core measurement capability.
Solution Approach 2:
The patent replaces expensive and complex measurement circuits with a simple, low-cost current sensing approach that uses basic electronic components. The method achieves sufficient measurement precision through clever measurement strategy rather than expensive hardware.
2Measurement precision
If complex methods involving DDS algorithms and phase detection circuits are used to identify impedance, then measurement precision is improved, but manufacturing cost increases
Solution Approach 1:
The patent employs inexpensive current sensing components and simple circuitry instead of expensive DDS algorithms and phase detection circuits. The manufacturing cost is significantly reduced while the impedance identification precision remains sufficient for practical applications.
Solution Approach 2:
The patent extracts only the essential measurement function from the complex system, eliminating expensive components and algorithms while retaining the core capability to identify impedance through simple current measurement at resonance.
3Measurement precision
If complex methods involving DDS algorithms and phase detection circuits are used to identify impedance, then measurement precision is improved, but ease of operation is worsened
Solution Approach 1:
The patent extracts the essential measurement function from the complex DDS and phase detection system, resulting in a simple current measurement operation that is easy to implement and operate while maintaining sufficient measurement precision for impedance identification.
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
This method allows for efficient identification of the impedance interval of the ultrasonic atomization sheet, facilitating better impedance matching and reducing power loss, thereby enhancing the operating efficiency and cost-effectiveness of ultrasonic atomizers.
Implementation Method 1
the ultrasonic atomization sheets are made of piezoelectric materials, and the piezoelectric materials have significant difference in electrical characteristics
Implementation Method 2
acquiring a first current, where the first current is a current output from a power supply in the ultrasonic atomizer when the ultrasonic atomization sheet operates at a resonance frequency
Data Source
AI summary
An impedance identification method for an ultrasonic atomizer (100), and an ultrasonic atomizer (100). The impedance identification method is used for identifying the impedance of an ultrasonic atomization sheet (12) in an ultrasonic atomizer (100). The method comprises: acquiring a first current, wherein the first current is a current which is output from a power source (14) in an ultrasonic atomizer (100) when an ultrasonic atomization sheet (12) operates at a resonant frequency; and according to preset correspondences between currents and impedance intervals, determining an impedance interval corresponding to the first current.