NON-CONTACT PIPELINE FLAW DETECTOR Russian patent published in 2024 - IPC F17D5/00 G01V3/17 

FIELD: measuring.

SUBSTANCE: invention relates to measurement equipment and can be used for non-contact inspection of defects of main oil and gas pipelines using unmanned aerial vehicles. Non-contact pipeline flaw detector is installed on an aircraft-type unmanned aerial vehicle and contains two measuring channels. One of the measuring channels is high-frequency, the second one is low-frequency. Outputs of both channels are connected via microcontroller to flash memory device. High-frequency measuring channel comprises an induction radiator connected to a high-frequency generator and two induction magnetic receivers symmetrically placed relative to the radiator in an orthogonal plane, outputs of which are connected through phase detectors to band-pass filters tuned to vibration frequencies of the pipe defect. Outputs of band-pass filters are connected to a signal adder connected to a low-frequency channel multiplier. Second outputs of the high-frequency channel are connected through a multiplier and an integrator to a microcontroller containing a logic gate of “AND” type, which combines results of registration of signals of both channels. Low-frequency measuring channel has an induction receiver tuned to the vibration frequency, which is connected through an amplifier and a band-pass filter to one of the inputs of the multiplier, and the second input is connected to an adder of output signals of the high-frequency channel. Output of the multiplier is connected through an integrator to a microcontroller which records the cross-correlation coefficient of the signals of both channels into the flash memory.

EFFECT: increased speed of control, automation of measurements and reduced labour intensity.

2 cl, 2 dwg