CPC G01N 23/12 (2013.01) [G01F 1/74 (2013.01); G01T 1/202 (2013.01); G01T 1/2023 (2013.01); G01N 2223/04 (2013.01); G01N 2223/202 (2013.01); G01N 2223/505 (2013.01); G01N 2223/5055 (2013.01); G01N 2223/605 (2013.01); G01N 2223/635 (2013.01)] | 10 Claims |
1. A method, comprising:
1) disposing a plurality of devices in a circumferential direction of a fluid pipe under test, wherein each of the devices comprises a scintillation crystal and a detector, the scintillation crystal is coupled to the detector, and the scintillation crystal comprises lutetium-176; aligning the scintillation crystal of each device with the fluid pipe, and disposing the scintillation crystal between the fluid pipe and the detector;
2) decaying the scintillation crystal to emit intrinsic rays;
3) allowing the intrinsic rays to pass through the fluid pipe under test, and detecting, by the detector, a starting point and an end point of the intrinsic rays, and converting optical signals of the intrinsic rays, by the detector, into electrical signals;
4) acquiring corresponding lines of responses according to the intrinsic rays produced by each decay and transmission paths thereof; and
5) finding out all effective lines of responses and calculating a mass fraction of a multiphase fluid based on an energy and path of the lines of responses.
|