There are many common detection methods in the field of non-destructive testing. Industrial endoscope has the characteristics of directly observing the surface defects. All kinds of metal and non-metal objects can be detected, such as all kinds of food and drug tanks, oil and gas tanks, all kinds of pipe internal, boiler internal defects surface detection has very good results.

工業內窺鏡檢測時是怎樣判定物體內部缺陷的呢？

How to determine the internal defects of objects in the detection of industrial endoscope?

(1)裂紋。當光束照射被檢測物表面，觀察到黑色或者亮色線條，且在一定的放大倍數下，線條有不規則邊緣時，判定為裂紋。當裂紋較寬時，可測量探頭的測量影響線會發生彎折。

(1) Cracks. When the light beam irradiates the surface of the tested object, black or bright lines are observed, and under a certain magnification, the lines have irregular edges, it is judged as cracks. When the crack is wide, the influence line of the measurable probe will bend.
                

(2)起皮。當光束平行照射時，觀察到在凸起部分背后有陰影；改變光束照射角度，則觀察到表面凸起部分與周圍被檢測物有明顯分界線，判定為起皮。

(2) Peeling. When the beam is irradiated in parallel, the shadow behind the convex part is observed; when the beam irradiation angle is changed, the obvious boundary between the convex part on the surface and the surrounding object is observed, which is judged as peeling.

(3)拉線和劃痕。在光束照射下，觀察到表面存在較規則的連續長線，判定為拉線。

(3) Stay wires and scratches. Under the irradiation of light beam, regular continuous long lines were observed on the surface, which was judged as stay wire.

(4)凹坑凸起。光束以一定角度照射時，與周圍被檢物邊界連接，無分界線。離光源近的部分有陰影，離光源遠的地方有亮影，為凹坑。光束以一定角度照射時，與周圍被檢物邊界連接，無分界線。凸起部分有亮影，且背后陰影為凹坑。當凹坑較深或凸起較高時，可測量探頭的測量線會發生彎折。

(4) The pit is convex. When the light beam irradiates at a certain angle, it is connected with the boundary of the surrounding objects, and there is no dividing line. The part near the light source has shadow, and the part far away from the light source has bright shadow, which is pit. When the light beam irradiates at a certain angle, it is connected with the boundary of the surrounding objects, and there is no dividing line. The convex part has light shadow, and the shadow behind is pit. When the pit is deep or the bulge is high, the measuring line of the measurable probe will be bent.

(5)斑點。在光束照射時，觀察到與周圍被檢物色澤不同的光滑無凹凸表面為斑點。

(5) Spots. When the light beam irradiates, it is observed that the smooth and non concave convex surface with different color from the surrounding objects is spot.