Ultrasonic Transducer Frequency Calibration Using Feedback Signals
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Solution Overview
Problem
Conventional ultrasonic transducers require high manufacturing costs due to fixed frequency micro controllers that are not dynamically adjustable, leading to suboptimal performance under environmental changes like temperature and humidity variations.
Innovation Solution
An apparatus comprising an oscillator, micro controller, counting unit, transformer, and transducer that dynamically adjusts the frequency of exciting signals based on output signal variations, using a feedback mechanism to calculate and adjust the clock signal, ensuring optimal transmission despite environmental changes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a fixed frequency micro controller is used to generate exciting signals, then the device structure is simple, but the transmission efficiency deteriorates under environmental changes
Solution Approach 1:
The patent implements a feedback mechanism where the micro controller receives the output signal from the transducer, detects its frequency, and automatically adjusts the exciting signal frequency to match. This closed-loop feedback system enables the micro controller to adapt to environmental changes (temperature, humidity) that affect transducer frequency, thereby maintaining high transmission efficiency without requiring a complex fixed-frequency design
Solution Approach 2:
The patent dynamically changes the frequency parameter of the exciting signal based on detected transducer output frequency. The micro controller modifies the frequency parameter in real-time to match environmental variations, allowing the system to maintain optimal performance across different conditions without increasing overall device complexity
2Reliability
If a fixed frequency micro controller is used, then the manufacturing cost is high due to requiring accurate transducers, but the ease of manufacture is reduced
Solution Approach 1:
The patent enables the transducer system to self-calibrate and self-adjust its operating frequency automatically. The micro controller detects the actual transducer output frequency and adjusts the exciting signal accordingly, eliminating the need for expensive pre-calibrated or high-precision transducers. This self-service capability allows the use of lower-cost transducers while maintaining reliable performance
Solution Approach 2:
Instead of relying on manufacturing precision to produce accurate transducers, the patent changes the approach by dynamically adjusting the exciting signal frequency parameter to match the actual transducer characteristics. This shifts the solution from manufacturing precision to operational adaptability, significantly reducing component costs while maintaining system reliability
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 dynamic frequency calibration of exciting signals, enhancing transmission efficiency and maintaining performance across varying environmental conditions without increasing product costs.
Implementation Method 1
a transformer, whose input terminal is being coupled to the counting unit, for receiving the clock signal and transferring the clock signal to be a plurality of exciting signals
Implementation Method 2
a transducer, whose input terminal is being coupled to the transformer, and the transducer is being excited by the exciting signals to generate an output signal
Data Source
AI summary
An apparatus for automatically calibrating a transducer are disclosed in the present invention, the apparatus comprising: an oscillator, for generating a system frequency; a micro controller, being coupled to the oscillator, for receiving the system frequency; a counting unit, being installed inside the micro processor, for generating at least a clock signal according to the system frequency; a transformer, whose input terminal is being coupled to the counting unit, for receiving the clock signal and transferring the clock signal to be a plurality of exciting signals, the output terminal feedbacks and couples the exciting signals to the interrupting signal input terminal of the micro controller, wherein the a plurality of exciting signals comprising at least a primary oscillating signal and at least a secondary oscillating signal and the amount of the clock signal equals to that of the primary oscillating signal; and a transducer, whose input terminal is being coupled to the transformer, and the transducer is being excited by the exciting signals to generate an output signal. Thus, the micro controller can be dynamically calibrating the frequency of the exciting signal according to the output signal variation of the transducer, and the best transmitting effect can be achieved without being suffered from the variation of external environment such as the temperature, humidity change.