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Time division multiplexing high power phased array ultrasonic signal generating device

A time-division multiplexing and ultrasonic signal technology, applied in the field of electronic science, can solve the problems of high cost and bulky phased array ultrasonic signal generator, and achieve the effect of saving equipment cost, reducing the scale of the circuit, and reducing the volume of the equipment

Inactive Publication Date: 2016-08-10
HOHAI UNIV CHANGZHOU
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Problems solved by technology

[0004] The purpose of the present invention is to solve the problems of large volume and high cost of some existing phased array ultrasonic signal generators on the market. According to the time division multiplexing technology of digital signals, the purpose of the present invention is to provide a small volume and low cost Phased array ultrasonic signal generating device, a high-power phased array ultrasonic signal generating device for instant division multiplexing, which generates focused sound beams, used for ultrasonic non-destructive testing of concrete structures in industry, and the delay accuracy can reach ηs level. Meet the requirements of ultrasonic non-destructive testing of concrete structures

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Embodiment Construction

[0028] In order to make the technical means, creative features, goals and effects achieved by the present invention easy to understand, the present invention will be further described below in conjunction with specific embodiments.

[0029] Refer to attached figure 1 , the small signal pulse generation part of the Field Programmable Logic Gate Array (FPGA), the small signal pulse generation process of the present invention is as follows:

[0030] The field programmable logic gate array (FPGA) is controlled by the host computer, namely computer, to output the pulse signal with adjustable delay and pulse width. The computer is connected to the Field Programmable Logic Gate Array (FPGA) through the RS232 serial cable. In order to ensure the reliability of the communication, the baud rate of the serial port is set to 115200, and the parity check is turned on. The serial port program on the computer is written in C# language. The input parameters of the program include the delay...

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Abstract

The invention provides a time division multiplexing high power phased array ultrasonic signal generating device, which is mainly used for ultrasonic test of concrete structure. The device comprises a host computer control end, an on-site programmable logic gate array, a time division multiplexing high voltage pulse amplifying circuit, an ultrasonic transducer array and a data distributor. The on-site programmable logic gate array is connected to an input end of the time division multiplexing high voltage pulse amplifying circuit; the input end of the data distributor is respectively connected with a signal control output end of the on-site programmable logic gate array and the output end of the time division multiplexing high voltage pulse amplifying circuit; and the output end of the data distributor is connected with the ultrasonic transducer array. The device greatly reduces the circuit scale, reduces the volume of equipment, saves the cost of equipment, can produce a focusable sound beam used for industrial nondestructive testing of concrete structures, also can also adjust the pulse width of output signal for transducers with different center frequency; and the device reaches delay accuracy of Eta s level, and meets the requirements of the ultrasonic nondestructive test of concrete structure.

Description

technical field [0001] The invention belongs to the field of electronic science, and specifically relates to the use of time-division multiplexing technology, in particular to a time-division multiplexing high-power phased array ultrasonic signal generating device. Background technique [0002] Ultrasonic nondestructive testing technology plays a huge role in the development of modern industry. Compared with traditional single-probe ultrasonic testing technology, phased array ultrasonic nondestructive testing technology has the advantages of wide detection range, large depth and accurate positioning. The phased array probe is a transducer array composed of multiple transducers, and each transducer array is controlled by a high-voltage pulse signal. By controlling the delay of the excitation pulse, multiple ultrasonic signals with different phases are generated, so that they produce the effect of interference enhancement at the expected focal point. Changing the delay parame...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N29/34
CPCG01N29/343
Inventor 朱云峰韩庆邦汪冰滢陈莉莉朱昌平
Owner HOHAI UNIV CHANGZHOU
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