A new method for calibration of velocity sensitivity of ultrasonic transducers with a wide band standard acoustic source generated by a pulsed laser is proposed.
In such conditions a shear head wave is generated, so that standard techniques based on monopole transducers can be used to measure formation shear velocity.
在这种情况下会产生横波首波，因此可以使用基于单极子传感器的标准技术测量地层横波。
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When appropriate transducers are installed, it may be applied to the measurement of distance, depth, average flow velocity and mass flow rate.