Application Cases

In recent years, high-power piezoelectric transducers have developed rapidly and are widely used in fields such as sonar, ultrasonic welding, ultrasonic testing, and acoustic-driven antennas. These transducers typically pursue high performance, such as wide bandwidth and good sensitivity. Therefore, the core piezoelectric material must possess excellent piezoelectric properties, such as the piezoelectric coefficient d₃₁ and the mechanical quality factor Q_m. Although various new piezoelectric materials have been developed for high-power transducers, it is very difficult to directly apply the improved materials to the design of high-power transducers, because the existing small-signal measurement results are difficult to directly apply to the design of high-power transducers.

The ATA-3000/4000/2000 series of high-voltage power amplifiers are based on AB class amplification circuits, featuring low distortion and high stability. They have a maximum bandwidth of up to 3 MHz and a maximum output voltage of up to 1600 Vpp, and are widely used in testing and performance evaluation of various piezoelectric materials.

Experiment Name: Measurement Method of High-Voltage Piezoelectric Properties Based on PZT-5H and Decoupling Study of Power and Temperature Effects

Experiment Principle:PZT-5H ceramics, due to their low Q_mvalue, are prone to heating at high power, making them suitable for studying the temperature dependence of vibrator performance. Temperature changes can affect parameters such as the piezoelectric constant and dielectric constant of PZT-5H, thereby influencing its piezoelectric properties. In the experiment, the effect of temperature on piezoelectric properties can be studied by controlling the temperature variable and measuring the piezoelectric property parameters at different temperatures. Power changes can cause heating and temperature changes in piezoelectric ceramics, which in turn affect their piezoelectric properties. In the experiment, the effect of power on piezoelectric properties can be studied by controlling the input power variable and measuring the piezoelectric property parameters at different power levels.

Experiment Block Diagram:

Experiment Photograph:

Experiment Process:In the experiment, two steel needles are clamped at the geometric center of the vibrator, allowing it to vibrate horizontally under free boundary conditions and providing electrical connections. Both impedance and transient methods use a Doppler laser vibrometer for real-time vibration velocity measurements. An infrared thermal imager is used for real-time surface temperature measurements. A signal generator and an ATA-3080 power amplifier are used as a constant voltage source, with the signal generator producing an excitation signal that is amplified distortion-free by the power amplifier. Additionally, a current probe is used to record the spectrum near the cutoff frequency. The position of the combination point is set to 1.6 times the resonant impedance at maximum power, with a frequency between the cutoff frequency and the cutoff frequency. This rule ensures that the voltage applied by the constant voltage method remains within a reasonable range.

Application Directions:Scientific Research, Industrial Production, Medical Diagnosis, Aerospace, Energy Sector

Application Scenarios:High-Power Piezoelectric Properties, Piezoelectric Transducers, Piezoelectric Ceramics, Material Parameters, Transient Method

Product Recommendation:ATA-300/3000 Series Power Amplifiers

Figure: Specifications of the ATA-300/3000 Series Power Amplifiers