High-Power Ultrasound Instruments

Conventional ultrasonic instrumentation has been designed to provide good performance with conventional piezoelectric transducers that enjoy a high-degree of efficiency when properly coupled to the material.

However, there are techniques and applications where very high voltages and/or long bursts of energy are necessary to produce the desired outcome, including:

  • Non-contact techniques such as Electro-Magnetic Acoustic Transducers and air-coupled ultrasound.
  • Highly attenuative materials and low-frequency applications.
Conventional PZT High-Power Pulsers
Voltage
(peak to peak)
50-150 V 425 V 250 V 1200 V 1200 V 2000 V
Cycles
1/2 1/2 3-4 1/2 Up to 10
Applications - Standard PZT
- Phased Array
- High-End PZT
- Magnetostrictive
Normal Beam
EMAT
- Specialty (Stress
and Load
Measurements)
- Normal
Beam
EMAT
- EMAT (all
wave
modes)
- High-Spec
EMAT

Innerspec has patented a unique pulser topology that permits outputs in excess of 20kW of power in frequencies ranging from 50kHz to 20MHz. The advantages of these pulsers include:

  • Large power density.
  • Optimum power over a wide range of frequencies.
  • High efficiency (>93%) with minimum heat dissipation needs.

Innerspec uses 8kW and 20kW pulsers in their high-power TEMATE instrumentation as shown in the table below:

The power output at different frequencies for the 8kW and 20kW pulsers are shown on the tables below:

Model Maximum Power Output
Complete UT Instruments
Innerspec POWERBOX H 1200 Vpp @ 25 App into 50 Ohms (8 kW)
0.1% Maximum Duty per Channel
Innerspec POWERBOX 1, 2 1200 Vpp @ 25 App into 50 Ohms (8 kW)
1% Maximum Duty per Channel
Innerspec POWERBOX 8 200 Vpp to 2000 Vpp @ 40 App into 50 Ohms (8 kW)
1% Maximum Duty per Channel
Rackmount Tone Burst Amplifiers
temate TBA 1, 2, 24 200 Vpp to 2000 Vpp @ 40 App into 50 Ohms (8 kW)
1% Maximum Duty per Channel
Pulsers
TEMATE Pulser 200 Vpp to 2000 Vpp @ 40 App into 50 Ohms (8 kW)
1% Maximum Duty per Channel

8kW RF Pulser 8k

High-Power UT Instrumentation 8kW Pulser, Power vs Frequency

Typical output currents and voltages 8Kw RF pulser at 1.5Mhz.

High-Power UT Instrumentation 8kW pulser at 1.5Mhz

20kW RF Pulser

Typical output currents and voltages 20Kw RF pulser at 1.5Mhz.

High-Power UT Instrumentation 20kW Pulser