Changmin Technology Co., Ltd.

Jong S Paik

Soo Dong Kim

Hak Soo Chang

An ultrasonic flow measuring method and apparatus thereof comprises a plurality of ultrasonic vibrator apparatus mounted around the peripheral edge of a large caliber pipe at predetermined intervals, in which the ultrasonic vibrator apparatus are disposed at intervals of l=2R/(n+1) on one side radius R and at intervals of l'=R/(n+1)on the opposite side radius as well as operated in an alternating sequential arrangement in order to avoid the interference with one another, the ultrasonic vibrator apparatus are mounted on the outer wall of the pipe by being inserted into a hole of the pipe wall at a predetermined angle to the center line of the pipe, and the ultrasonic vibrator apparatus comprises a body inserted into the pipe wall; a first chamber constituted as a part of the body, for receiving an ultrasonic vibrator; and a second chamber constituted as a part of the body, for receiving a block having an acoustic resistance identical to that of the liquid flowing in the large caliber pipe to be measured, in which the ultrasonic vibrator and the block are integrated with each other, and the block is fitted into the body or supported in the body by means of a supporter, the upper surface of which is flush with the inner surface of the pipe. The ultrasonic flow measuring apparatus comprises an ultrasonic flow measuring circuit, which enables the delay time and the actual propagation distance of the ultrasonic pulses in the liquid to be precisely measured and corrected, if necessary.

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Dajon, South Korea

Jong S Paik