Through transmission ultrasonic (TTU) methods are widely used for inspection of critical aerospace structural components because of their simplicity and the high sensitivity of TTU methods to bonding and delamination type defects. TTU inspection requires access to both sides of a component, which is generally not a problem before components are installed in final assemblies. However, limited ac...

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This paper describes the design of a pulse generator based on the Programmable System-on-Chip (PSoC) module. In this module, using programmable logic is possible to implement different pulses which are required for ultrasonic applications, either in a single channel or multiple channels. This module can operate with programmable frequencies from 3-74 MHz; its programming may be versatile coveri...

The measurement principle of the transit time difference method of the ultrasonic flowmeter is presented. The hardware structure and realization method are introduced. The software function and work mode are overviewed. In order to enhancing flowmeter's precision and stability a Xilinx CoolRunner CPLD and a Texas Instruments microcontroller from MSP430 family are applied in high precision timin...