A high efficiency sampling method for fully automatic trace explosive detection system

Abstract

The present disclosure discloses a high-efficiency sampling method for a full-automatic trace explosive detection system, and belongs to the technical field of security inspection equipment. The sampling device for trace explosive detection comprises a sampling roller blind and a power component connected with a first end of the sampling roller blind, wherein the power component can rotate to adjust the length of the sampling roller blind in the sampling area; when the sampling roller blind has a first length, the second end of the sampling roller blind is in contact with and rubs against the object to be detected to collect the detection sample on the object to be detected; when the sampling roller blind has a second length, the second end of the sampling roller blind with the detection sample enters the detection system. The sampling device for trace explosive detection disclosed by the present disclosure can automatically sample.

Description

TECHNICAL FIELD

[0001] The present disclosure relates to the technical field of security inspection equipment, further relates to a sampling device for trace explosive detection, a detection system and a sampling method. BACKGROUND

[0002] In the field of security inspection, various detection systems are often used to detect whether there are illegal articles or substances on the surface or inside of articles.

[0003] Detection systems for special substances such as explosives, drugs, industrial toxic gases and chemical agents often need to sample trace amounts (i.e. the content of the measured substance in the sample is very low) on the surface of articles. In the prior art, a wiping paper is usually used to collect trace samples remaining on the surface of articles. A staff member holding the wiping paper (wearing gloves) directly wipes the to-be-detected substance, or the wiping paper is fixed on a sampler, the staff member holds the sampler to collect the sample, and then inserts the wiping paper collecting the sample into a detection device of a detection system for detection, and waits for the detection result. This method has the disadvantages of waste of human resources, high time cost and economic cost of sampling. SUMMARY

[0004] (I) Technical problems to be solved

[0005] Therefore, the purpose of the present disclosure is to provide an efficient sampling method for a full-automatic trace explosive detection system to solve at least one of the above technical problems.

[0006] (II) Technical solutions

[0007] According to an aspect of the present disclosure, a sampling device for trace explosive detection is provided, comprising: a sampling roller blind and a power component connected to a first end of the sampling roller blind, wherein the power component is capable of rotating to adjust the length of the sampling roller blind in a sampling area, when the sampling roller blind has a first length, a second end of the sampling roller blind is in contact with and rubs against a to-be-detected object to collect a detection sample on the to-be-detected object; when the sampling roller blind has a second length, the second end of the sampling roller blind collecting the detection sample enters a detection system.

[0008] Further, the sampling roller blind comprises a plurality of roller blind units arranged side by side in the cross-sectional direction of the entrance of the sampling area, and the lengths of the roller blind units of the sampling roller blind are the same.

[0009] Further, the plurality of roller blind units are arranged as one sampling unit, the sampling roller blind comprises a plurality of sampling units, and the number of the power components is the same as the number of the sampling units.

[0010] Further, the roller shutter unit comprises a roller shutter body made of flexible material and a medium material arranged on the outer surface of the second end of the roller shutter body, and the detection sample is collected on the medium material, and the sampling roller shutter can be deformed under external force.

[0011] Further, the sampling device for trace explosive detection further comprises a sensing assembly, the sensing assembly comprises a position sensor for sensing the position of the object to be detected, and the sampling device for trace explosive detection further comprises a control component, and the position sensor and the power component are electrically connected with the control component.

[0012] Further, the position sensor comprises a first position sensor and a second position sensor, the maximum distance that can be sensed by the first position sensor is greater than the maximum distance that can be sensed by the second position sensor, and the second position sensor is located at the entrance of the sampling area.

[0013] Further, the sensing assembly further comprises an image sensor for sensing the shape of the object to be detected in the sampling area, and the control component and the power component are electrically connected with the image sensor, and the control component is arranged to be capable of controlling the power component of the corresponding sampling unit to be turned on or turned off according to the shape of the object to be detected sensed by the image sensor.

[0014] According to another aspect of the present disclosure, a detection system is provided, comprising a conveying device, a heating device, a detection device and the above-mentioned sampling device, and the detection device is formed with a sampling area.

[0015] Further, the detection system further comprises a switching device connected with the outlet end of the heating device, the switching device is used for controlling the opening or closing of the passage through which the vaporized detection sample is delivered to the detection device, and the switching device is electrically connected with the control component of the sampling device.

[0016] According to another aspect of the present disclosure, a sampling method is provided, comprising:

[0017] controlling the conveying device to transport the object to be detected to the sampling area;

[0018] detecting the position of the object to be detected in the sampling area;

[0019] controlling the power component to be turned on when the object to be detected reaches the specified position in the sampling area;

[0020] under the drive of the power component, the length of the sampling roller shutter is adjusted to the first length, so that the second end of the sampling roller shutter is in contact with and rubs against the object to be detected to collect the detection sample on the object to be detected, and the length of the sampling roller shutter is adjusted to the second length, so that the second end of the sampling roller shutter with the detection sample is collected enters the heating device of the detection system.

[0021] (Three) beneficial effects

[0022] The high-efficiency sampling method for the full-automatic trace explosive detection system of the present disclosure can realize automatic sampling. BRIEF DESCRIPTION OF DRAWINGS

[0023] Figure 1 A side view of a detection system of an embodiment of the present disclosure, wherein the sampling curtain of the sampling device is of a first length;

[0024] Figure 2 A side view of a detection system of an embodiment of the present disclosure, wherein the sampling curtain of the sampling device is of a second length;

[0025] Figure 3 A P-P profile diagram of Figure 1 a front view of a sampling device of an embodiment of the present disclosure;

[0026] Figure 4 A schematic diagram of the connection of components of a sampling device of an embodiment of the present disclosure;

[0027] Figure 5 A flowchart of a sampling method of an embodiment of the present disclosure. DETAILED DESCRIPTION

[0028] In order to make the objectives, technical solutions and advantages of the present disclosure clearer, the present disclosure is further described in detail below with reference to specific embodiments and the accompanying drawings. The following description of the embodiments of the present disclosure with reference to the accompanying drawings is intended to explain the overall inventive concept of the present disclosure, and should not be understood as a limitation of the present disclosure.

[0029] According to the basic concept of the present disclosure, a sampling device for trace explosive detection is provided, which realizes automatic sampling through a power component and a sampling curtain. The present disclosure provides a high-efficiency sampling method for a full-automatic trace explosive detection system, i.e., a sampling device for trace explosive detection, a detection system and a sampling method.

[0030] Figure 1 A structural schematic diagram of a detection system of an embodiment of the present disclosure, wherein the structure of the sampling device for trace explosive detection of an embodiment of the present disclosure is shown. As shown in Figure 1 According to an aspect of an embodiment of the present disclosure, a sampling device for trace explosive detection 100 is provided, which comprises a sampling curtain 1 and a power component 2 connected to a first end 11 of the sampling curtain 1, wherein the power component 2 can rotate to adjust the length of the sampling curtain 1 in a sampling area 203, as shown in Figure 1 When the sampling curtain 1 has a first length, the second end 12 of the sampling curtain 1 is in contact with and rubs against the object M to be detected to collect a detection sample on the object M to be detected; and when the sampling curtain 1 has a second length, the second end 12 of the sampling curtain 1 is in contact with and rubs against the object M to be detected to collect a detection sample on the object M to be detected, as shown in Figure 2As shown, when the power component 2 is started and rotated to the length of the sampling curtain 1 being the second length, the second end 12 of the sampling curtain 1 with the detection sample is entered into the detection system 200, and automatic sampling is realized.

[0031] The sampling device 100 for trace explosive detection in the embodiment of the present disclosure is used for sampling the object M to be detected in the sampling area 203 of the detection system 200 to obtain a detection sample. In use, after the object M to be detected is entered into the sampling area 203 of the detection system 200, the power component 2 connected with the sampling curtain 1 is started, and the power component 2 can be rotated to adjust the length of the sampling curtain 1 in the sampling area 203, as shown in the following. Figure 1 As shown, when the power component 2 is started and rotated to the length of the sampling curtain 1 being the first length, the second end 12 of the sampling curtain 1 is in contact with and rubs against the object M to be detected to collect the detection sample on the object M to be detected. Figure 2 As shown, when the power component 2 is started and rotated to the length of the sampling curtain 1 being the second length, the second end 12 of the sampling curtain 1 with the detection sample is entered into the detection system 200, and automatic sampling is realized.

[0032] Exemplarily, the power component 2 can be set as a motor.

[0033] The sampling device 100 for trace explosive detection in the embodiment of the present disclosure: by setting the sampling curtain 1 and the power component 2 connected with the first end 11 of the sampling curtain 1, on the one hand, the power component 2 can adjust the length of the sampling curtain 1 when it is started and rotated, and when the length of the sampling curtain 1 is the first length, the second end 12 of the sampling curtain 1 is in contact with and rubs against the object M to be detected to obtain the sample to be detected, and automatic sampling is completed; on the other hand, the length of the sampling curtain 1 can be flexibly adjusted to adapt to different application scenarios: when sampling is needed, the length of the sampling curtain 1 is adjusted to the first length for automatic sampling; when sampling is not needed, the length of the sampling curtain 1 is adjusted to the second length, and the space of the sampling area 203 is not occupied.

[0034] It should be noted that the sampling device 100 for trace explosive detection in the embodiment of the present disclosure can be applied in various detection systems of security check, such as X-ray scanning equipment, CT scanning equipment, ion mobility detector, etc. The embodiment of the present disclosure takes the sampling device 100 applied in the ion mobility detector as an example for description.

[0035] Ion mobility spectrometry (IMS) as a rapid detection of explosives, drugs, industrial toxic gas, trace detection technology of chemical agents, has been widely used in airport, customs, subway, government agencies and other security areas. Ion mobility spectrometry detector using ion mobility spectrometry technology mainly includes three components: a drift tube for ion analysis, a sample inlet (or called resolver) for gasifying the sample, and a swab (or gas collection device) for collecting / capturing trace samples. For ion mobility spectrometry detectors used for explosive / drug detection, due to the extremely low saturated vapor pressure of the sample to be detected (ppb to ppt level) or non-volatility, the staff usually uses a swab to collect trace samples left on the surface of the object. Generally, the swab is directly wiped on the surface of the object (wearing gloves), or the swab is fixed on a sampler, the sampler is held to collect the sample, and then the swab with the collected sample is inserted into the sample inlet for detection, and the detection result is waited.

[0036] The sampling device 100 for trace explosive detection of the embodiments of the present disclosure can automatically suck the trace detection sample (which can be in the form of gas or particles) on the object M to be detected for detection, shortening the sampling time, saving manpower, saving human resources; without swab, the economic cost is lower.

[0037] As shown in Figure 1 , Figure 3 , the sampling roller shutter 1 can include a plurality of roller shutter units 15 arranged side by side in the inlet cross-sectional direction of the sampling area 203 (i.e. the P-P view direction shown in Figure 3 The length of each roller shutter unit 15 of the sampling roller shutter 1 is the same. Through this arrangement, each roller shutter unit 15 of the sampling roller shutter 1 can cover the object M to be detected in the inlet cross-sectional direction of the sampling area 203 after the object M to be detected enters the sampling area 203, and each roller shutter unit 15 can be in contact with and rub against the object M to be detected without affecting each other, with higher sampling efficiency.

[0038] For example, each roller shutter unit 15 can be arranged to have a first length as shown in Figure 1 The distance x between one end of the roller shutter unit 15 close to the transmission device 201 and the outer surface of the transmission device 201 can be in the range of 0-0.5 cm, to ensure that the roller shutter unit 15 is in close proximity to the outer surface of the transmission device 201 to contact and rub against the object M to be detected entering the sampling area 203, and complete sampling.

[0039] As shown in Figure 1 , Figure 3As shown, according to the sampling device 100 for trace explosive detection of the embodiment of the present disclosure, a plurality of roller shutter units 15 can be arranged as one sampling unit 16, the sampling roller shutter 1 can include a plurality of sampling units 16, and the number of power components 2 is the same as the number of sampling units 16. Through the arrangement, a plurality of sampling units 16 can be formed, and the arrangement is more reasonable. After the object M to be detected enters the sampling area 203, the power component 2 of the sampling unit 16 close to the object M to be detected can be controlled to accurately sample the object M to be detected.

[0040] As shown in Figure 3 , according to the sampling device 100 of the embodiment of the present disclosure, the roller shutter unit 15 can include a roller shutter body 13 made of flexible material and a medium material 14 arranged on the outer surface of the second end of the roller shutter body 13. The detection sample is collected on the medium material 14, and the sampling roller shutter 1 can be deformed under external force. By arranging the roller shutter body 13 made of flexible material, when the object M to be detected contacts the sampling roller shutter 1 during movement, the sampling roller shutter 1 can be deformed accordingly, avoiding rigid friction or collision between the sampling roller shutter 1 and the object M to be detected, and damaging the sampling roller shutter 1 and / or the object M to be detected. By arranging the medium material 14 on the outer surface of the second end of the roller shutter body 13, the quality of the sample obtained after sampling can be improved.

[0041] It should be understood that since the sampling roller shutter 1 includes a plurality of roller shutter units 15 arranged side by side, the sampling roller shutter 1 is essentially composed of a plurality of roller shutter units 15. Therefore, the "second end of the roller shutter body 13" mentioned here is consistent with the second end of the sampling roller shutter 1, that is, the end close to the outer surface of the transmission device 201.

[0042] It should be noted that the "medium material 14" mentioned here needs to meet the conditions of not reacting with the sample obtained by sampling and being resistant to high temperature.

[0043] It should be further noted that in the present embodiment, the detection system is taken as an ion mobility detector, and a device for heating the sampled sample is arranged in the ion mobility detector (which will be described below). Therefore, in the present embodiment, the "medium material 14" needs to meet the condition of being resistant to high temperature. In other detection systems, since the detection principle is different, the properties that the "medium material 14" needs to meet can also be changed accordingly.

[0044] Exemplarily, the medium material 14 can be made of polytetrafluoroethylene material or polyimide material. The medium material 14 can also be made of other materials, which are not limited here.

[0045] In combination with Figure 3 , Figure 4As shown in the figure, the sampling device 100 for trace explosive detection according to the embodiment of the present disclosure can further comprise a sensing assembly 3, which can comprise a position sensor 31 for sensing the position of the object M to be detected, and the sampling device 100 for trace explosive detection can further comprise a control component 4, and the position sensor 31 and the power component 2 are electrically connected to the control component 4. Through the arrangement, the position of the object M to be detected can be detected, and when the object M to be detected reaches the specified position, the power component 2 can be controlled to be turned on to collect the sample.

[0046] As shown in the figure, Figure 3 As shown in the figure, the sampling device 100 for trace explosive detection according to the embodiment of the present disclosure can comprise a first position sensor 311 and a second position sensor 312, the maximum distance that can be sensed by the first position sensor 311 is greater than the maximum distance that can be sensed by the second position sensor 312, and the second position sensor 312 can be located at the entrance of the sampling area 203. Through the arrangement, the position of the object M to be detected can be reasonably and accurately detected, and the first position sensor 311 can determine whether there is an object M to be detected at a long distance, and the second position sensor 312 can determine the position of the object M to be detected that is about to enter the sampling area 203.

[0047] As shown in the figure, Figure 3 As shown in the figure, the object M to be detected can be placed on a tray N, the first position sensor 311 can also be used to sense the position of the tray N, and the second position sensor 312 can also be used to sense the position of the tray N or the object M to be detected, and the first position sensor 311 can be arranged as a radar, and the second position sensor 312 can be arranged as a photoelectric sensor.

[0048] As shown in the figure, Figure 3 As shown in the figure, the sampling device 100 for trace explosive detection according to the embodiment of the present disclosure can further comprise an image sensor 32 for sensing the shape of the object M to be detected in the sampling area 203, and the control component 4 and the power component 2 can be electrically connected to the image sensor 32, and the control component 4 can be arranged to control the power component 2 of the sampling unit 16 at the corresponding position to be turned on or turned off according to the shape of the object M to be detected sensed by the image sensor 22. Through the arrangement, the power component 2 of the sampling unit 16 at the corresponding position can be turned on according to the shape of the object M to be detected, and the object M to be detected can be sampled. For example, as shown in the figure, Figure 3 As shown in the figure, Figure 4 As shown in the figure, after the image sensor 32 senses the shape of the object M-1, the power component 2-1 of the sampling unit 16-1 at the corresponding position can be controlled to be turned on; and after the image sensor 32 senses the shape of the object M-2, the power component 2-2 of the sampling unit 16-2 at the corresponding position can be controlled to be turned on.

[0049] As shown in the figure, Figure 1As shown, according to another aspect of the present disclosure, a detection system 200 is also provided, including a transmission device 201, a heating device 204, a detection device 202 and a sampling device 100 as described above, wherein a sampling area 203 is formed on the detection device 202.

[0050] When the detection system 100 of this embodiment is in use, the object to be detected M is placed on the transmission device 201 and transported into the sampling area 203 along the transmission direction B. In the sampling area 203, the sampling device 100 samples the particles and / or gas near the object to be detected M. The collected detection sample is heated to vaporization in the heating device 204 and then sent to the detection device 202 for detection. Finally, the detection result is output.

[0051] The detection system 100 of this embodiment is equipped with the sampling device 100 described above, which enables automatic sampling, shortens sampling time, saves manpower, eliminates the need for wiping paper, and is more economical.

[0052] It should be noted that after the sample is collected and heated by the heating device 204, the sample will vaporize. The sample on the sampling roller 1 is cleaned when it vaporizes. Therefore, the sampling roller 1 of the sampling device 100 can be reused. When used multiple times, the sampling roller 1 is adjusted in a cyclical manner of "first length - second length...".

[0053] like Figure 1 As shown, the detection system 200 according to an embodiment of this disclosure may further include a switching device 205 connected to the outlet end of the heating device 204. The switching device 205 can be used to control the opening or closing of the passage for the vaporized test sample to be transported to the detection device 202. The switching device 205 is electrically connected to the control component 4 of the sampling device 100. With this configuration, the test sample can be controlled to enter the detection device 202 via the switching device 205, coordinating with the sampling and detection process.

[0054] For example, the switching device 205 is turned on and off synchronously with the heating device 204, and the switching device 205 may be configured as a solenoid valve.

[0055] like Figure 5 As shown, according to another aspect of the embodiments of this disclosure, a sampling method 300 for the detection system 200 as described above is also provided, comprising:

[0056] Step S301: Control the transmission device 201 to transport the object M to be detected to the sampling area 203;

[0057] Step S302: Detect the position of the object M to be detected in the sampling area 203;

[0058] Step S303, when the object M to be detected reaches the specified position in the sampling area 203, the power component 2 of the sampling device 100 is turned on;

[0059] Step S304, under the driving of the power component 2, the length of the sampling roller blind 1 is adjusted to the first length, the second end 12 of the sampling roller blind 1 is in contact with the object M to be detected and rubs to collect the detection sample on the object M to be detected; the length of the sampling roller blind 1 is adjusted to the second length, the second end 12 of the sampling roller blind 1 with the detection sample is collected enters the heating device 204 of the detection system 200.

[0060] In step S302, the position of the object M to be detected in the sampling area 203 can be detected by a sensor; the position of the object M to be detected can also be determined by the position sensor 31, when the object M to be detected is transported to the entrance of the sampling area 203, the power component 2 is turned on.

[0061] The sampling method 300 of the embodiment of the present disclosure can make the power component 2 drive the sampling roller blind 1 to adjust the length and automatically sample by controlling the power component 2 of the sampling device 100 to be turned on, without manual sampling, saving human resources and time cost; without wiping paper, it has higher economy.

[0062] The above specific embodiments further illustrate the purpose, technical solutions and beneficial effects of the present disclosure, it should be understood that the above description is only for specific embodiments of the present disclosure and is not used to limit the present disclosure, any modification, equivalent replacement, improvement, etc. within the spirit and principles of the present disclosure should be included in the protection scope of the present disclosure.

Claims

1. A sampling device for trace explosive detection, characterized in that, The sampling device comprises: a sampling curtain and a power component connected to a first end of the sampling curtain, wherein the power component is rotatable to adjust the length of the sampling curtain in the sampling area, when the sampling curtain has a first length, a second end of the sampling curtain is in contact with the object to be detected to collect the detection sample on the object to be detected; when the sampling curtain has a second length, the second end of the sampling curtain with the detection sample enters the detection system; the sampling curtain comprises a plurality of curtain units arranged side by side in the cross-sectional direction of the entrance of the sampling area, and the length of each curtain unit of the sampling curtain is the same; a plurality of curtain units are arranged as a sampling unit, the sampling curtain comprises a plurality of sampling units, and the number of power components is the same as the number of sampling units; the sampling device further comprises a sensing assembly, the sensing assembly further comprises an image sensor for sensing the shape of the object to be detected in the sampling area, and the sampling device for detecting trace explosives further comprises a control component, the control component and the power component are electrically connected with the image sensor, and the control component is arranged to be capable of controlling the power component of the corresponding sampling unit to be turned on or turned off according to the shape of the object to be detected sensed by the image sensor.

2. The sampling device for trace explosives detection according to claim 1, characterized in that, The curtain unit comprises a curtain body made of flexible material and a medium material arranged on the outer surface of the second end of the curtain body, the detection sample is collected on the medium material, and the sampling curtain can be deformed under external force.

3. A sampling device for trace explosive detection as claimed in claim 2, wherein, The sensing assembly comprises a position sensor for sensing the position of the object to be detected, and the position sensor and the power component are electrically connected with the control component.

4. A sampling device for trace explosive detection according to claim 3, characterised in that, The position sensor comprises a first position sensor and a second position sensor, the maximum distance that can be sensed by the first position sensor is greater than the maximum distance that can be sensed by the second position sensor, and the second position sensor is located at the entrance of the sampling area.

5. A detection system characterized by, The sampling device comprises a transmission device, a heating device, a detection device and a sampling device according to any one of claims 3-4, and the detection device is formed with a sampling area.

6. The probe system of claim 5, wherein, Further comprising a switching device connected to the outlet end of the heating device, the switching device is used to control the opening or closing of the passage of the vaporized detection sample to the detection device, and the switching device is electrically connected with the control component of the sampling device.

7. A sampling method for a probe system as claimed in claim 5, characterized in that, The sampling device comprises: controlling the transmission device to transport the object to be detected to the sampling area; detecting the position of the object to be detected in the sampling area; controlling the power component to be turned on when the object to be detected reaches the specified position in the sampling area; under the drive of the power component, the length of the sampling curtain is adjusted to a first length, so that the second end of the sampling curtain is in contact with the object to be detected to collect the detection sample on the object to be detected; the length of the sampling curtain is adjusted to a second length, so that the second end of the sampling curtain with the detection sample enters the heating device of the detection system.

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