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
Typical output currents and voltages 8Kw RF pulser at 1.5Mhz.
20kW RF Pulser
Typical output currents and voltages 20Kw RF pulser at 1.5Mhz.
