Laser-induced plasma tester for soil heavy metal detection and testing method thereof

Abstract

The invention discloses a laser-induced plasma tester for soil heavy metal detection and a testing method thereof.The laser-induced plasma tester comprises a bottom plate, an optical fiber head is installed on one side of a laser head, a focusing lens is arranged below the laser head and the optical fiber head and installed on an adjusting lens assembly, a coupling lens is arranged below the focusing lens, and the coupling lens is installed on the adjusting lens assembly. The coupling lens is fixedly connected to the upper end of the fixing support, a supporting disc is fixedly connected to one side of the upper surface of the fixing support, a sampling box is installed on the side, away from the laser device body, of the fixing support, and a machining assembly is installed in the sampling box. The threaded rod is in engaged connection with the threaded ring through threads, the threaded ring is arranged in the middle of the movable plate, and the limiting rods penetrate through the two sides of the movable plate and can limit the movable plate, so that the movable plate is driven to ascend and descend along the threaded rod, and the focusing lens is driven to ascend and descend to be matched with the coupling lens. And the focusing effect is achieved.

Description

Technical field [0001] The present invention belongs to the field of spectrometer technology, in particular to the soil heavy metal detection with laser induced plasma tester and test method thereof. Background [0002] When the soil is detected, the laser output by the laser light source is focused on the soil surface through the focusing lens, the soil is excited to a plasma state, the emitted plasma light is sent to the spectrometer through the optical fiber, the spectrometer collects the data transmission in the computer, and then maintains, analyzes and displays through the computer, for this application number: CN201721597692.8, discloses a soil heavy metal spectrometer based on laser-induced breakdown spectroscopy technology, including the host body and the detection probe, the detection probe includes the housing, The sampling head and the optical inspection part provided in the inner cavity of the shell; the bottom end of the housing is provided with a through hole; the...

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Problems solved by technology

[0004] Aiming at the problems existing in the prior art, the present invention provides a laser-induced plasma tester for soil heavy metal detection and a test method thereof, which has the advantages of automatic processing of sampled soil before detection and automatic focus adjustment, and solves the existing problems. The unevenness of the sampling soil will affect the detection efficiency of heavy metals. The collected soil is processed manually before detection, which increases the labor force and needs to manually adjust the lens to focus during the test process.

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