WO2023115847A1

WO2023115847A1 - Trace particle and steam detection system

Info

Publication number: WO2023115847A1
Application number: PCT/CN2022/099349
Authority: WO
Inventors: 陈昶卓; 包云肽; 李元景; 肖翼; 张舜生; 王迪; 刘亚运; 李璐璐
Original assignee: 同方威视技术股份有限公司; 苏州微木智能系统有限公司
Priority date: 2021-12-24
Filing date: 2022-06-17
Publication date: 2023-06-29
Also published as: CN114383925A

Abstract

A trace particle and steam detection system, comprising: a first sampling unit (1), suitable for gasifying a test target absorbed on a sampling carrier to form a first target gas; a second sampling unit (2), suitable for enriching a second target gas; and a detection unit (3), suitable for detecting the first target gas and the enriched second target gas. The detection system can simultaneously detect a sample of suction-type gas sampling and a sample sampled by a manual handheld sampling carrier.

Description

Trace Particle and Vapor Detection Systems

Cross References to Related Applications

This application claims the rights and interests of a Chinese patent application with application number 202111597080.X filed with the China Patent Office on December 24, 2021, the entire disclosure of which is incorporated herein by reference.

technical field

At least one embodiment of the present disclosure relates to a security inspection system, in particular to a trace particle and vapor detection system for security inspection.

Background technique

During luggage and cargo inspection, because the saturated vapor pressure of explosives and drug molecules is extremely low (ppb to ppt level) or basically non-volatile, operators usually use wipes to collect trace samples remaining on the surface of personnel and luggage . Generally, you can directly wipe the surface of the measured object with a hand-held wipe (wearing gloves), or you can fix the wipe on the sampler, hold the sampler to collect samples, and then put the collected samples into the detection system for detection. Test results.

Since it is time-consuming and labor-intensive to manually sample the surface of the object to be tested, and the sampling wipes are consumables, when the number of inspections increases, the consumption of consumables increases accordingly, and the application cost is high. Additionally, when physical space is limited, there are situations where it is difficult to reach into the swab for direct sampling.

Therefore, there is a need for improved detection systems.

Contents of the invention

In view of this, the main purpose of the present disclosure is to provide a trace particle and vapor detection system, in order to at least partially solve at least one technical problem mentioned above and other aspects.

According to an embodiment of the present disclosure, a trace particle and vapor detection system is provided, including:

The first sampling unit is adapted to vaporize the test target adsorbed on the sampling carrier to form a first target gas;

The second sampling unit is suitable for enriching the second target gas;

The detection unit is suitable for detecting and analyzing the first target gas and the enriched second target gas.

According to an embodiment of the present disclosure, the first sampling unit includes:

The first injection port is suitable for receiving the sampling carrier;

The thermal desorber is suitable for heating the sampling carrier to vaporize the test target to form the first target gas.

According to an embodiment of the present disclosure, the second sampling unit includes:

The second sampling port is suitable for receiving the second target gas;

The enricher is in controllable communication with the second injection port, and is suitable for enriching the second target gas;

A conduit, in controllable communication with the aspirator inlet, adapted to deliver a second target gas.

According to an embodiment of the present disclosure, the second sampling unit further includes a sampling hose, which is adapted to penetrate deeply into the target to be detected and deliver the second target gas to the second sampling port.

According to an embodiment of the present disclosure, a first electromagnetic valve is provided between the second sample inlet and the enricher.

According to an embodiment of the present disclosure, a second solenoid valve is provided between the second sample inlet and the pipeline.

According to an embodiment of the present disclosure, one of the first solenoid valve and the second solenoid valve is turned on.

According to an embodiment of the present disclosure, the enricher includes a plurality of enrichment pipes, and each enrichment pipe is provided with an adsorption medium and a heating part; the adsorption medium is suitable for adsorbing the second target gas, so as to enrich the second target gas, The heating part is suitable for heating the adsorption medium to detach the second target gas adsorbed on the adsorption medium.

According to an embodiment of the present disclosure, when the first electromagnetic valve is turned on, the second sample inlet can be controllably connected to a target enrichment pipeline among the plurality of enrichment pipelines.

According to an embodiment of the present disclosure, the detection unit includes: a detector, adapted to detect the first target gas and the enriched second target gas, an air pump is arranged inside the detector, and the air pump is suitable for driving the second gas inlet to adsorb Second target gas.

According to an embodiment of the present disclosure, the detection unit further includes: a first semipermeable membrane disposed between the thermal desorber and the detector, and suitable for selectively filtering the first target gas.

According to an embodiment of the present disclosure, the detection unit further includes: a second semipermeable membrane disposed between the enricher and the detector, and adapted to selectively filter the second target gas.

According to the trace particle and vapor detection system provided by the embodiments of the present disclosure, by using the first sampling unit, the test target on the manual hand-held sampling carrier can be processed, and then the detection unit can be used to detect the test target, and by using the second The sampling unit enriches the second target gas to realize the sampling of the second target gas (this sampling process is also called inhalation gas sampling), and then uses the detection unit to detect the second target gas, and the sampling of the second target gas The process does not need to use manual hand-held sampling carriers for sampling. Therefore, the trace particle and vapor detection system provided by the embodiments of the present disclosure can simultaneously support inhalation gas sampling, detection of inhalation gas sampling samples, and detection of test targets of manual hand-held sampling carriers.

Description of drawings

FIG. 1 is a structural block diagram of a detection system according to an embodiment of the present disclosure.

Explanation of reference signs

1 first sampling unit

11 The first injection port

12 thermal desorber

2 second sampling unit

21 Second injection port

22 enricher

23 pipes

3 detection unit

31 first semi-permeable membrane

32 second semipermeable membrane

33 detectors

Detailed ways

In order to make the purpose, technical solutions and advantages of the present disclosure clearer, the present disclosure will be further described in detail below in conjunction with specific embodiments and with reference to the accompanying drawings.

It should be understood, however, that these descriptions are exemplary only, and are not intended to limit the scope of the present disclosure. Also, in the following description, descriptions of well-known structures and techniques are omitted to avoid unnecessarily obscuring the concepts of the present disclosure. Various structural schematic diagrams according to embodiments of the present disclosure are shown in the accompanying drawings. The figures are not drawn to scale, with certain details exaggerated and possibly omitted for clarity of presentation.

According to the general inventive concept of one aspect of the present disclosure, a trace particle and vapor detection system is provided, comprising:

The second sampling unit is suitable for enriching the second target gas;

The detection unit is suitable for detecting the first target gas and the enriched second target gas.

According to an exemplary embodiment of the present disclosure, as shown in FIG. 1 , a detection system is provided, including: a first sampling unit 1 , a second sampling unit 2 , and a detection unit 3 .

The first sampling unit 1 (ie, the particle sampling subsystem) is adapted to vaporize the test target adsorbed on the sampling carrier (not shown in the figure) to form the first target gas. The sampling carrier can be a wipe paper, and the test target on the sampling carrier can be a target particle. Therefore, in the first sampling unit 1, the target particle can be placed and processed. The second sampling unit 2 (ie, the gas sampling subsystem) is suitable for enriching the second target gas. The detection unit 3 (that is, the detection subsystem) is suitable for detecting the first target gas and the enriched second target gas, that is, it can detect the target particles and the second target gas.

According to the detection system of the embodiment of the present disclosure, since the first sampling unit 1 can vaporize the target particles adsorbed on the sampling carrier (such as a swab), it can support the traditional swab swabbing sampling and perform rapid heating extraction on the swab sample.

The detection system according to the embodiment of the present disclosure supports synchronous detection, that is, the first sampling unit 1 and the second sampling unit 2 are turned on at the same time, and the target particles and the second target gas are detected at the same time in the same detection, or they can be turned on separately The first sampling unit 1 or the second sampling unit 2 detects the target particles or the second target gas.

According to an embodiment of the present disclosure, the first sampling unit 1 includes: a first sample inlet (swab paper inlet) 11, adapted to receive the sample carrier; a thermal desorber 12, adapted to heat the sample carrier, to The test target is vaporized to form a first target gas.

According to an embodiment of the present disclosure, the second sampling unit 2 includes a second sampling port (a suction sampling port) 21 , a concentrator 22 , and a pipeline 23 . The second sample inlet 21 is suitable for receiving the second target gas. The enricher 22 is in controllable communication with the second sample inlet, and is suitable for enriching the second target gas. The pipeline 23 is in controllable communication with the suction inlet and is suitable for delivering the second target gas.

According to an embodiment of the present disclosure, an air pump is arranged inside the detector 33 of the detection unit, and the air pump is adapted to drive the second sample inlet 21 and is adapted to receive the second target gas.

According to an embodiment of the present disclosure, the concentrator 22 includes a plurality of enrichment pipes, and each enrichment pipe is provided with an adsorption medium (not shown in the figure) and a heating part (not shown in the figure); the adsorption medium is suitable for The second target gas is adsorbed to enrich the second target gas, and the heating unit is adapted to heat the adsorption medium to detach the second target gas adsorbed on the adsorption medium. The gas molecules produced by the low-saturated vapor pressure and non-volatile substances are "pre-concentrated" on the adsorption material in the enricher. After the set enrichment time, the high temperature generated by the heating part is used to absorb The medium is heated rapidly to obtain the second target gas with a higher concentration.

According to an embodiment of the present disclosure, a first solenoid valve is provided between the second sample inlet 21 and the enricher 22 . A second solenoid valve is provided between the second sample inlet 21 and the pipeline 23 . One of the first solenoid valve and the second solenoid valve is turned on.

According to an embodiment of the present disclosure, a first solenoid valve is provided between the second sample inlet 21 and the enricher 22, and a second solenoid valve is provided between the second sample inlet 21 and the pipeline 23, so that the enricher A pneumatic reversing mechanism is formed between the collector 22 and the pipeline 23, and the setting of the pneumatic reversing mechanism can support the detection of substances with different high and low saturated vapor pressures. Specifically, first open the second electromagnetic valve, use the detector 33 of the detection unit to drive the second sample inlet 21 to receive the second target gas, and the second target gas enters the pipeline 23 from the second sample inlet 21 to complete the saturated steam Sampling of high pressure substances. Next, open the first solenoid valve, use the detector 33 of the detection unit to drive the second sample inlet 21 to receive the second target gas, the second target gas enters the enricher 22 from the second sample inlet 21 and is enriched enriched in the device 22 to obtain the second target gas with higher concentration, and this process can complete the sampling of substances with low saturated vapor pressure.

According to an embodiment of the present disclosure, when the first electromagnetic valve is turned on, the second sample inlet can be controllably connected to a target enrichment pipeline among the plurality of enrichment pipelines. Since the concentrator can contain multiple channels, the channels can be used in turn by switching, and the channels that are not in use can be restored to the service state through high-temperature cleaning, reducing the cleaning time of the system.

According to an embodiment of the present disclosure, the second sampling unit further includes a sampling hose (not shown in the figure), which is adapted to penetrate deep into the target to be detected, and deliver the second target gas to the second sampling port twenty one.

According to the embodiments of the present disclosure, the sampling hose is suitable for penetrating deep into the target to be detected (such as a container, cargo box, suitcase, etc.) to obtain the target gas in the target. In addition, the length of the sampling hose is adjustable, so it can go deep into the target to be tested at a long distance. In addition, the sampling hose can bypass the physical structure and penetrate deep into the target to be detected.

According to an embodiment of the present disclosure, the detector 33 is adapted to detect the first target gas and the enriched second target gas.

According to an embodiment of the present disclosure, the detection unit further includes a first semipermeable membrane 31 disposed between the thermal desorber 12 and the detector 33 , suitable for selectively filtering the first target gas.

According to an embodiment of the present disclosure, the detection unit further includes a second semipermeable membrane 32 disposed between the concentrator 22 and the detector 33 , adapted to selectively filter the second target gas.

According to an embodiment of the present disclosure, the detector 33 includes an ion mobility spectrometer, a gas chromatography-ion mobility spectrometer, a small mass spectrometer, an asymmetric field ion mobility spectrometer, a gas chromatography-ion mobility spectrometer, an electrochemical sensor array, At least one of a photoacoustic spectrum sensor, a QCL infrared spectroscopy system, a fluorescent polymer sensor, and a quartz crystal microbalance detector.

According to the detection system of the embodiment of the present disclosure, it is difficult for the relevant detection system to perform one-time inspection on the larger air cargo box, the truck compartment and the container with many items stored inside without opening the package of the goods. However, the detection system of the embodiment of the present disclosure is equipped with a sampling hose in the second sampling unit, which can adapt to the inspection site, and can bypass obstacles or inspect items hidden inside the packaging without completely opening the packaging.

According to the detection system of the embodiments of the present disclosure, since it can simultaneously support the detection of gas sampling samples after gas sampling and the detection of manual hand-held sampling carriers, compared with the traditional method of sampling only using sampling wipes, The application cost is lower, which greatly reduces the application cost of the whole life cycle of the security inspection equipment. The same operator can inspect multiple items and improve the inspection efficiency.

According to the detection system of the embodiment of the present disclosure, by adding the enricher 22 for pre-concentration, the successful detection of low-volatility substances with low saturated vapor pressure is realized. Therefore, the detection system of the embodiment of the present disclosure has high sensitivity. The detection system of the embodiments of the present disclosure can detect explosives, and can continuously enhance the inspection capability of the system by expanding the feature database to add drugs, toxic and harmful gases, explosive precursors, precursor chemicals and other contraband.

The detection system according to the embodiments of the present disclosure has the potential to be integrated into automated unmanned equipment such as drones, unmanned vehicles, and robots.

The detection system according to the embodiments of the present disclosure is mainly used in the field of security inspection, especially for baggage and article scanning in airports, customs, logistics and other fields, such as passenger baggage inspection and air cargo inspection in civil aviation airports. It can also be extended to food, chemical, pharmaceutical, biological, semiconductor, electromechanical equipment manufacturing and other industrial fields to detect trace chemical substances of concern in this field.

The specific embodiments described above have further described the purpose, technical solutions and beneficial effects of the present disclosure in detail. It should be understood that the above descriptions are only specific embodiments of the present disclosure, and are not intended to limit the present disclosure. Within the spirit and principles of the present disclosure, any modifications, equivalent replacements, improvements, etc., shall be included in the protection scope of the present disclosure.

Claims

A trace particle and vapor detection system comprising:

The first sampling unit (1) is adapted to vaporize the test target adsorbed on the sampling carrier to form a first target gas;

A second sampling unit (2), adapted to enrich the second target gas;

The detection unit (3) is adapted to detect the first target gas and the enriched second target gas.
The trace particle and vapor detection system of claim 1, wherein,

The first sampling unit (1) includes:

a first sample inlet (11), adapted to receive the sample carrier;

The thermal desorber (12) is suitable for heating the sampling carrier to vaporize the test target to form the first target gas.
The trace particle and vapor detection system of claim 1, wherein,

The second sampling unit (2) includes:

A second sample inlet (21), adapted to receive the second target gas;

An enricher (22), controllably communicated with the second injection port, suitable for enriching the second target gas;

A pipeline (23), in controllable communication with the suction inlet, is adapted to deliver the second target gas.
The trace particle and vapor detection system according to claim 3, wherein the second sampling unit further comprises a sampling hose, the sampling hose is adapted to go deep into the target to be detected, and the second The target gas is delivered to the second sampling port (21).
The trace particle and vapor detection system according to claim 3, wherein a first electromagnetic valve is arranged between the second sample inlet (21) and the enricher (22).
The detection system according to claim 5, wherein a second electromagnetic valve is arranged between the second sample inlet (21) and the pipeline (23).
The trace particle and vapor detection system as claimed in claim 6, wherein one of the first solenoid valve and the second solenoid valve is open.
The trace particle and vapor detection system according to any one of claims 3-7, wherein the enricher (22) comprises a plurality of enrichment pipes, each of which is provided with an adsorption medium and a heating part; the adsorption medium is suitable for adsorbing the second target gas to enrich the second target gas, and the heating part is suitable for heating the adsorption medium so that the adsorption medium The second target gas on the detachment.
The trace particle and vapor detection system according to claim 8, wherein, when the first solenoid valve is opened, the second sampling port is controllably connected to the targets in the plurality of enrichment pipelines enrichment pipeline.
The trace particle and vapor detection system according to claim 8, wherein said detection unit comprises:

A detector (33), adapted to detect the first target gas and the enriched second target gas, the detector (33) is internally provided with an air pump, and the air pump is adapted to drive the first target gas The second sampling port receives the second target gas.
The trace particle and vapor detection system according to claim 10, wherein the detection unit further comprises:

The first semi-permeable membrane (31), arranged between the thermal desorber (12) and the detector (33), is suitable for selectively filtering the first target gas.
The trace particle and vapor detection system according to claim 10, wherein the detection unit further comprises:

The second semipermeable membrane (32), arranged between the enricher (22) and the detector (33), is suitable for selectively filtering the second target gas.