PROBE SYSTEM, ENGINE, INSPECTION METHOD, AND PROGRAM

摘要

PROBLEM TO BE SOLVED: To provide a probe system which inhibits the lowering of measurement sensitivity of a predetermined probe part in the case of arranging the probe part in a fluid containing much dust.SOLUTION: A probe system 1 includes: a probe part 10 having a light condensing part 100 arranged inside a flow passage 2 in which a first fluid flows and optically taking in information of the inside of the flow passage 2 and a circulation pipe 102 forming a flow passage so that a second fluid flows out around the light condensing part 100; a fluid supply part 12 for supplying the second fluid to the circulation pipe 102 at a predetermined flow velocity; and a flow velocity control part 13 for controlling the flow velocity of the second fluid supplied to the circulation pipe 102 so that a kinetic momentum ratio which is the ratio of kinetic momentum of the second fluid flowing out from the circulation pipe 102 to kinetic momentum of the first fluid becomes a predetermined threshold value or more.