Cylindrical Shell Detection Method and Cylindrical Shell Detection Device

A cylindrical shell detection device, comprising:

• a first terahertz transmitting electromagnetic wave generator, configured to generate a first transmitting electromagnetic wave and emit the first transmitting electromagnetic wave to an inner side surface of a cylindrical shell, wherein the inner side surface comprises a plurality of inner interface layers;
• a second terahertz transmitting electromagnetic wave generator, configured to generate a second terahertz transmitting electromagnetic wave and emit the second terahertz transmitting electromagnetic wave to an outer side surface of the cylindrical shell, wherein the outer side surface comprises a plurality of outer interface layers;
• a first terahertz transmitting electromagnetic wave receiver, configured to detect a plurality of first terahertz reflected electromagnetic waves reflected by the first transmitting electromagnetic wave emitted to the plurality of inner interface layers of the inner side surface;
• a second terahertz transmitting electromagnetic wave receiver, configured to detect a plurality of second terahertz reflected electromagnetic waves reflected by the second terahertz transmitting electromagnetic wave emitted to the plurality of outer interface layers of the outer side surface;
• and
• a detection device, coupled to the first terahertz transmitting electromagnetic wave generator, the second terahertz transmitting electromagnetic wave generator, the first terahertz transmitting electromagnetic wave receiver and the second terahertz transmitting electromagnetic wave receiver, configured to measure the plurality of first characteristic signals and the plurality of second characteristic signals, to determine a plurality of first characteristics of the plurality of inner interface layers and a plurality of second characteristics of the plurality of outer interface layers according to the first transmitting electromagnetic wave, the plurality of first terahertz reflected electromagnetic waves, the second terahertz transmitting electromagnetic wave and the plurality of second terahertz reflected electromagnetic waves.

A cylindrical shell detection device, comprising:

• a first terahertz transmitting electromagnetic wave generator, configured to generate a first transmitting electromagnetic wave and emit the first transmitting electromagnetic wave to an inner side surface of a cylindrical shell, wherein the inner side surface comprises a plurality of inner interface layers;
• a first terahertz transmitting electromagnetic wave receiver, configured to detect a plurality of first terahertz penetrating electromagnetic waves penetrated by the first transmitting electromagnetic wave emitted to the plurality of inner interface layers of the inner side surface and penetrating through the cylindrical shell and an outer side surface of the cylindrical shell, wherein the outer side surface comprises a plurality of outer interface layers;
• and
• a detection device, coupled to the first terahertz transmitting electromagnetic wave generator and the first terahertz transmitting electromagnetic wave receiver, configured to measure the plurality of first characteristic signals to determine a plurality of first characteristics of the plurality of inner interface layers and a plurality of second characteristics of the plurality of outer interface layers according to the first transmitting electromagnetic wave and the plurality of first terahertz penetrating electromagnetic waves.