Phased array ultrasonic detection, data acquisition and process device

Abstract

The invention discloses a phased array ultrasonic detection data acquisition and processing unit, comprising a USB bus and a main control computer; the USB bus communication is connected with a data acquisition and processing card component, and a 64 array element ultrasound phased array transducer in sequence; the data acquisition and processing card component comprises 16 completely same data acquisition and processing cards; the data acquisition and processing card comprises a four-way ultrasonic emission / reception and signal pretreatment circuit, an A / D conversion module, an FPGA module and a DSP microprocessor module, a reset circuit, and a power supply module, which are connected in a coordinating way; the data acquisition and processing card component has 64 input channels and 16 output channels, wherein every four input channels and one output channel have a data acquisition and processing card correspondingly; by controlling the time delaying of pulse excitating or receiving of each array element in a transducer array, and changing the phase relationship of sound wave emitted or received by each array element when reaching or coming from a cetain point in an object, the flexible deflection and focusing of the acoustic beam are achieved, and the transverse movement of the acoustic beam position can also be realized by selecting the needed array element group.

Description

technical field [0001] The invention relates to the field of detection data collection and processing devices, in particular to a phased array ultrasonic detection data collection and processing device. High-speed multi-channel data acquisition and processing for phased array ultrasonic detection of structural defects on offshore platforms. Background technique [0002] The environment of the offshore platform structure is harsh. With the increase of service time, the offshore platform structure will be damaged in different degrees and in different forms. The existence of these damage defects will seriously threaten the service safety and reliability of the offshore platform structure. Therefore, in order to ensure the safe operation of the offshore platform structure, it is necessary to conduct regular or irregular inspections of the platform structure. [0003] The legs of the offshore platform structure are generally welded by steel pipes of several specifications. The u...

AI Technical Summary

Problems solved by technology

However, the existing ultrasonic data acquisition and processing devices on the market have fewer channels and the sampling frequency is not up to the requirements, and the traditional ultrasonic data acquisition and processing devices use single-chip microcomputer (MCU) or digital signal processor (DSP) to control data acquisition through software. A / D conversion, which will frequently interrupt the operation of the system, and the speed of data acquisition and processing will also be greatly limited

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