With the requirements of piezoelectric ceramic brakes for driving power, a signal power amplifier for driving ultrasonic transducers has been launched on the market. This series of dual-channel voltage amplifiers output a maximum frequency of DC-24MHz, a maximum output voltage of 1600Vpp and a maximum power of 1000W. It can meet the simple switching of transducers with different resonance frequencies and different driving signals.
The ultrasonic-driven dual-channel signal power amplifier is essentially a power signal generator, a device for generating excitation signals and providing ultrasonic energy to the ultrasonic transducer. The excitation signals generated by him are amplified by power and then passed through a matching circuit and energy conversion. The impedance of the transducer is matched to drive the transducer to work, that is, to provide a driving signal for the ultrasonic transducer. The driving signal is converted into the required sound field after the ultrasonic transducer, and the electrical signal is converted into a mechanical vibration signal.
The principle of a dual-channel voltage amplifier is that a signal of a specific frequency is first generated by a signal generator. The excitation signal generated by the signal source drives the transducer to work after power amplification. This specific frequency is the frequency of the transducer. The ultrasonic frequency generally used in ultrasonic equipment is tens of KHz, hundreds of KHz, or several MHz. With the continuous development of precision technology, the use area is gradually expanding.
Product performance of dual channel signal power amplifier:
The frequency of the output signal is DC-24MHz (all within the working frequency range)
The sine wave, square wave, triangle wave, sawtooth wave, and arbitrary waveform input of the dual-channel voltage amplifier can be amplified and output after passing through the amplifier. The power amplifier is compatible with mainstream arbitrary waveform function signal generators on the market.
The maximum output power can reach 1000W and the voltage is 1600Vpp, which can obtain different transducer loads;
Due to the different impedances of different transducers, the input and output resistances can be switched in two stages, which can better match more capacitive, inductive and resistive loads, and the test area is wide.
Research and test of dual-channel signal power amplifier driving piezoelectric ceramics:
To study the driving characteristics of piezoelectric ceramics, the main performance parameters of piezoelectric ceramic transducer materials are:
(1) Piezoelectric strain constant
Represents the amount of strain generated when a piezoelectric crystal is subjected to a unit voltage from the outside.
(2) Piezoelectric voltage constant
Represents the magnitude of the voltage gradient generated when the piezoelectric crystal is subjected to external unit stress. These two parameters are important parameters for measuring the emission performance of piezoelectric crystal materials. The larger the parameter, the better the emission performance and the higher the emission sensitivity.
(3) Frequency constant
The product of the natural frequency of the piezoelectric wafer and its thickness is a constant, called the frequency constant N. It can be seen that the thickness of the wafer is inversely proportional to the resonance frequency, and the frequency of the ultrasound mainly depends on the thickness of the wafer and the speed of sound in the wafer.
Dual-channel voltage amplifier--piezoelectric ceramic drive power, can output accurate DC voltage, its ripple, linearity, stability, repeatability, etc. all meet the design requirements; in order to improve the frequency and response speed when driving piezoelectric ceramic load The power supply also has an output power amplification function.
Xi'an Antai Electronic Technology Co., Ltd. is a professional manufacturer of electronic test instruments. The main products are dual-channel voltage amplifiers, signal power amplifiers, wire harness testers, high-precision reference sources, etc.