Cone penetrometer and method for detecting multi-pollutants based on time domain reflectometry and laser induced fluorescence

A cone penetrometer for detecting multi-pollutants based on laser induced fluorescence and time domain reflectometry, characterized in that:

• a cone tip (1), a polyether ether ketone (PEEK) insulating rod (2), two gold-coated stainless steel probes (3), an endoscope image sensor (4), an alumina glass lens (5), an ultraviolet LED with a wavelength of 280 nm (280 nm UV light) (6), an ultraviolet LED with a wavelength of 325 nm (325 nm UV light) (7), a plane mirror (8) and a stainless steel rod (10);
• wherein a lower end of the PEEK insulating rod (2) is coaxially connected with the cone tip (1), and two gold-coated stainless steel probes (3) are inlaid and fixed on the outer surface of the PEEK insulating rod (2);
• the upper end of the PEEK insulating rod (2) is coaxially connected with a lower end of the stainless steel rod (10), and the stainless steel rod (10) is internally hollow and is drilled with a hole on a side wall thereof, the alumina glass lens (5) is inlaid in the drilled hole, and the stainless steel rod (10) at the drilled hole is internally equipped with a laser induced fluorescence (LIF) module composed of the endoscope image sensor (4), the 280 nm UV LED (6), the 325 nm UV LED (7) and the plane mirror (8), the endoscope image sensor (4), the 280 nm UV light (6), and the 325 nm UV light (7) are all wired out.