Multi-mode curved surface phased array ultrasonic tomography device

Abstract

The invention relates to a multi-mode curved surface phased array ultrasonic tomography device. The device is used for reconstructing the phase distribution of oil-gas-water three-phase fluid flowingthrough the to-be-measured section of a pipeline. The multi-mode curved surface phased array ultrasonic tomography device comprises an ultrasonic sensor array, a signal control module, a high-voltageexcitation module, a signal acquisition and demodulation module, an industrial bus and an upper computer module; different modes of the signal control module can be gated, so that the signal control module can control the excitation and measurement processes of all the other modules and the sensor array through a fixed time sequence; under the control of the signal control module, the high-voltageexcitation module generates excitation voltage signals of which the duration, frequency and duty ratio are adjustable, and applies the excitation voltage signals to excitation ultrasonic sensors; induction voltage signals received by the ultrasonic sensors are recorded, processed and subjected to analog-to-digital conversion through the signal acquisition and demodulation module; and obtained digital signals are transmitted to an FPGA control chip in the signal control module; and therefore, demodulation can be completed.

Description

technical field [0001] The invention belongs to the field of multiphase flow process tomography, and relates to the realization of a multi-mode curved phased array ultrasonic tomography measurement device, which can realize high-precision visual measurement of multiphase flow phase distribution and online estimation of distribution parameters. The present invention is aimed at, but not limited to, the widely existing oil-gas-water three-phase multiphase flow process, and the measuring device of the present invention is still applicable to the multiphase flow phenomenon existing in other industrial processes and chemical reactions. Background technique [0002] Multiphase flow phenomenon widely exists in modern engineering fields and equipment such as bioengineering, oil and gas exploration, chemical industry, metallurgical industry, food processing, etc., and plays a very important role in industrial production and scientific research. Accurate detection of flow process param...

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Problems solved by technology

[0005] At present, the existing ultrasonic tomography device mainly uses a single probe to excite at a single frequency, and records the data collected in the corresponding transmission or reflection mode, which has the defects of small data volume and single test mode

In addition, the existing ultrasonic tomography device has no ability to adjust the sound field, and cannot form an excitation sound field with dynamically adjustable direction, angle, amplitude, and frequency, and thus cannot obtain the multi-sensitive modulation information of the contents to different excitation sound fields

The defects of the above-mentioned test devices lead to the poor effect and low precision of ultrasonic tomography of oil-gas-water multiphase media, and it is impossible to perform real-time flow state monitoring and distribution parameter estimation

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