Handheld continuous sampling device

Abstract

The invention relates to a handheld continuous sampling device comprising a shell, a wiping matched part, a driving wheel, a driven wheel, a conveyor belt and a limiting device, wherein the wiping matched part is fixedly arranged in the shell and is exposed at a notch of the shell; the driving wheel is fixedly arranged in the shell and is provided with a first winding part for winding the conveyor belt; the driven wheel is fixedly arranged at one end, which is far away from the wiping matched part, in the shell and is provided with a second winding part; the two ends of the conveyor belt are fixed after bypassing a wiping part and are partially wound on the first winding part and the second winding part; and the limiting device is used for limiting the conveyor belt to continually move along a pre-set direction. According to the handheld continuous sampling device disclosed by the invention, a route range of the conveyor belt is controlled through the limiting device so as to prevent the conveyor belt stuck with sampled test paper from winding and prevent samples from mutually polluting; in addition, according to the invention, sampling carriers for each time of wiping can be continuously and automatically replaced and a problem that the samples are polluted so as to run off and fail to report, which is caused by the factor that the sampled samples contact mutually, is avoided; and therefore, the missing report rate is reduced.

Description

technical field [0001] The invention relates to a wiping sampling device, in particular to a hand-held continuous sampling device. Background technique [0002] Explosives and narcotics detectors based on ion mobility spectrometers or asymmetric field strength ion mobility spectrometers are fast, sensitive, and portable on-site detection instruments that have begun to be used in military and security inspection agencies to detect explosives , drugs, flammable and explosive liquids, corrosive items, etc. [0003] When the ion mobility spectrometer or asymmetric field strength ion mobility spectrometer detects contraband, in addition to the suction sampling method, the most commonly used method is the fixed sampling method, that is, the surface of the object is wiped with the sampling carrier first, and the target object to be inspected is wiped. Collect it on the sampling carrier, and then put the sampling carrier into the gas path of the instrument for detection and identif...

AI Technical Summary

Problems solved by technology

[0009] For this reason, the present invention aims to solve the technical problem of cutting the sampled sampling carrier into multiple strips and storing them together in the prior art, which may easily lead to mutual contamination of the sampled samples, resulting in sample loss and false reporting. A handheld continuous sampling device that can prevent mutual contamination of sampling carriers and sample loss

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