US 5,708,354 A · Portable electromagnetic acoustic transducer pulser controller

Abstract

A variable power source is provided having multiple power modules each of which can produce a portion of the total range of voltage required for pulsed operation of an electromagnetic acoustic transducer electromagnet. The power modules are connected in series, and controlled by individual potentiometers which are simultaneously adjusted. Selector switches are provided for enabling or disabling each module. The output of the power modules is connected to a pulser/controller for wave forming prior to sending the output signal to the electromagnet. A noise filter can be placed between the power modules and the pulser. LED-type indicators on the selector switches may be used to indicate the operational status of the modules.

Claims7

Dependent claims

A variable DC power supply for driving a pulser connected to an electromagnet of an electromagnetic acoustic transducer, the power supply comprising:

at least two variable voltage power modules, each module having positive and negative terminals, the modules electrically connected in series such that one positive terminal on one power module is a power module output, the modules for converting AC voltage to DC voltage;
an AC power supply connected to the at least two power modules;
potentiometer means for varying the voltage output of each power module;
diode protection means on each power module for preventing reverse voltages from forming across the positive and negative terminals of each module;
and
switching means for selectively enabling and disabling each power module.

3 more elements

Dependencies are inferred from the claim text.

Portable electromagnetic acoustic transducer pulser controller

Life of this patent

Portable electromagnetic acoustic transducer pulser controller

Life of this patent

Abstract

Claims7