阅读说明：本技术 一种痕量危爆品检测装置及检测方法 (Trace dangerous explosive detection device and detection method ) 是由 张志恒 宁飞 刘湘斌 陈乐� 祝胜康 曹瑞 侯肖楠 王翔宇 田原 于 2021-08-03 设计创作，主要内容包括：本发明提出了一种痕量危爆品检测装置及检测方法,检测装置包括：机架、取样组件、试纸及检测单元,机架具有用于放置待检测证件的承载台,试纸的部分卷绕于取样组件,试纸具有多节采样带；检测单元设于机架,用于对所述试纸的采样部位进行痕量危爆品检测；其中,在完成一次痕量危爆品检测后,若当前采样带检测到危爆品,或采样带达到预设使用次数,则在下次采样检测前,试纸转动至下一节采样带进行采样测试；若当前采样带未检测到危爆品,且采样带未达到预设使用次数,试纸反转复位至当前采样带,继续采样测试。本发明可以使试纸得到充分利用,且可以避免试纸重复利用影响检测结果,具有良好的可靠性和准确性。(The invention provides a trace explosive detection device and a detection method, wherein the detection device comprises: the test paper detection device comprises a rack, a sampling assembly, test paper and a detection unit, wherein the rack is provided with a bearing platform for placing a certificate to be detected, part of the test paper is wound on the sampling assembly, and the test paper is provided with a plurality of sections of sampling belts; the detection unit is arranged on the frame and used for detecting trace explosives at the sampling part of the test paper; after one-time trace explosive detection is finished, if the current sampling belt detects an explosive or the sampling belt reaches a preset use frequency, the test paper rotates to the next section of sampling belt for sampling test before the next sampling detection; if the current sampling band does not detect the explosive product and the sampling band does not reach the preset use times, the test paper is reversely reset to the current sampling band, and the sampling test is continued. The invention can make full use of the test paper, can avoid the influence of the reuse of the test paper on the detection result, and has good reliability and accuracy.)

1. The utility model provides a trace explosive detection device which characterized in that includes:

the device comprises a rack, a positioning device and a control device, wherein the rack is provided with a bearing table for placing a certificate to be detected;

the sampling assembly is arranged above the bearing table and can reciprocate along a first direction relative to the bearing table so as to switch between states of pressing and releasing the certificate to be detected;

the test paper is partially wound on the sampling assembly and provided with a plurality of sampling belts, and when the sampling assembly presses the certificate to be detected, the corresponding sampling belts on the test paper are in contact with the certificate to be detected and sample;

the detection unit is arranged on the rack and used for detecting trace explosives at the sampling part of the test paper;

after one trace explosive detection is finished, if the dangerous explosive is detected by the sampling belt at present or the sampling belt reaches the preset use times, the test paper rotates to the next sampling belt for sampling test before the next sampling detection; if the sampling band does not detect the explosive article currently, and the sampling band does not reach the preset use times, the test paper is reversely reset to the current sampling band before next sampling detection, and the sampling test is continued.

2. The trace explosive detection device according to claim 1, wherein a detection mark is provided between any two adjacent sampling bands on the test paper, and the detection device is provided with a first sensor for detecting the detection mark so as to detect and position the test paper.

3. The trace explosive detection device according to claim 2, wherein the detection mark is a positioning hole, and the positioning hole is arranged near the edge of the test paper.

4. The trace explosives detection device of claim 1, wherein the frame is provided with a first rotating wheel and a second rotating wheel, one end of the test paper is fixed on the first rotating wheel, the other end of the test paper is fixed on the second rotating wheel, part of the test paper passes through the sampling assembly and the detection unit, and when the first rotating wheel and/or the second rotating wheel rotate, the test paper is transmitted between the first rotating wheel and the second rotating wheel.

5. The trace explosive detection device according to claim 4, wherein the rack is provided with a driving motor, and the driving motor is connected with the first rotating wheel and/or the second rotating wheel so as to drive the first rotating wheel and/or the second rotating wheel to rotate.

6. The trace explosives detection device of claim 1, further comprising: the auxiliary unit penetrates through the test paper between the auxiliary unit and the detection unit, the auxiliary unit is provided with a telescopic auxiliary detection rod, and when the sampling part of the test paper is transmitted to the position of the detection port of the detection unit, the auxiliary detection rod enables the sampling part of the test paper to be tightly attached to the detection port.

7. The trace explosives detection device of claim 1, wherein the sampling assembly comprises:

the supporting plate is connected with the rack;

a drive plate having a cam mechanism;

the driving piece is connected with the cam mechanism so as to drive the driving plate to reciprocate along a first direction relative to the supporting plate through the cam mechanism;

one end of the strut penetrates through the supporting plate and is connected with the driving plate;

the pressing block is connected to the other end of the support, and part of the test paper is wound on the pressing block;

the reset spring is sleeved on the support column and is positioned between the support plate and the pressing block.

8. The trace explosive detection device according to any one of claims 1 to 7, wherein the bearing table is provided with a second sensor, and when the document to be detected is placed on the bearing table, the second sensor generates a sensing signal to control the sampling assembly to press the document to be detected so as to sample through the test paper.

9. A trace explosive detection method is characterized in that the method adopts the trace explosive detection device as claimed in any one of claims 1 to 7 to detect a certificate to be detected, and the method comprises the following steps:

placing a certificate to be detected on a bearing table;

a second sensor on the bearing table generates an induction signal to control the sampling assembly to press the certificate to be detected, and sampling is carried out through test paper wound on the sampling assembly;

and transmitting the sampling part of the test paper to a detection unit for detecting the trace explosive.

10. The method for detecting the trace explosive according to claim 9, wherein when the sampling component presses the component to be detected, the test paper rotates forward for a preset distance to wipe the certificate to be detected so as to sample the certificate to be detected.

Technical Field

The invention relates to the technical field of explosive detection, in particular to a trace explosive detection device and a trace explosive detection method.

Background

In places with high security requirements such as airports and high-speed rails, explosion-proof inspection is required, and the traditional mode is that a worker holds detection test paper to wipe passengers and personal articles, and then explosive detection is performed on a detection device. This not only affects the passenger experience to some extent, but also consumes high labor and material costs. Therefore, the trace explosive can be sampled simultaneously when the identity information is verified, so that the labor cost is saved, the passenger sample inspection is improved, the development direction of a security inspection mode is formed, and how to reliably sample the trace information on the identity card, the passport and other documents and accurately send the information to the detection unit for analysis is a difficult point in detection; meanwhile, with the abrasion of the test paper and the occurrence of alarm information, how to quickly and conveniently replace the test paper and how to repeatedly utilize the test paper is a difficult point of design.

Disclosure of Invention

The invention provides a trace explosive detection device and a detection method, aiming at solving the technical problems of fully utilizing the detection test paper of a trace explosive of a certificate and avoiding the problem that the detection result is influenced when the test paper is reused.

The trace explosive detection device according to the embodiment of the invention comprises:

the device comprises a rack, a positioning device and a control device, wherein the rack is provided with a bearing table for placing a certificate to be detected;

the sampling assembly is arranged above the bearing table and can reciprocate along a first direction relative to the bearing table so as to switch between states of pressing and releasing the certificate to be detected;

the test paper is partially wound on the sampling assembly and provided with a plurality of sampling belts, and when the sampling assembly presses the certificate to be detected, the corresponding sampling belts on the test paper are in contact with the certificate to be detected and sample;

the detection unit is arranged on the rack and used for detecting trace explosives at the sampling part of the test paper;

after one trace explosive detection is finished, if the dangerous explosive is detected by the sampling belt at present or the sampling belt reaches the preset use times, the test paper rotates to the next sampling belt for sampling test before the next sampling detection; if the sampling band does not detect the explosive article currently, and the sampling band does not reach the preset use times, the test paper is reversely reset to the current sampling band before next sampling detection, and the sampling test is continued.

The trace explosive detection device provided by the embodiment of the invention has the advantages of simple structure, convenience in operation, good reliability and accuracy of detection results and strong practicability, can detect the trace explosive information on the certificate while the identity of the passenger is verified after passing inspection, realizes non-inductive detection, improves the trip experience of the passenger, and can be popularized to various places needing explosion-proof detection. Moreover, the test paper can be recycled by arranging the test paper into a plurality of sections of sampling belts with preset use times. When the current sampling area detected the dangerous and explosive article, or the sampling area reached when predetermineeing the use number of times, rotated the test paper to next sampling area and carried out the sampling test, can avoid the sampling area last time to the influence that the testing result caused, effectively avoided the problem of result wrong report.

According to some embodiments of the present invention, a detection mark is disposed between any two adjacent sampling bands on the test paper, and the detection device is provided with a first sensor for detecting the detection mark, so as to detect and position the test paper.

In some embodiments of the present invention, the detection mark is a positioning hole, and the positioning hole is disposed near an edge of the test paper.

According to some embodiments of the present invention, the frame is provided with a first rotating wheel and a second rotating wheel, one end of the test paper is fixed to the first rotating wheel, the other end of the test paper is fixed to the second rotating wheel, a portion of the test paper passes through the sampling assembly and the detection unit, and the test paper is transmitted between the first rotating wheel and the second rotating wheel when the first rotating wheel and/or the second rotating wheel rotates.

In some embodiments of the present invention, the frame is provided with a driving motor, and the driving motor is connected with the first rotating wheel and/or the second rotating wheel to drive the first rotating wheel and/or the second rotating wheel to rotate.

According to some embodiments of the invention, the detection device further comprises: the auxiliary unit penetrates through the test paper between the auxiliary unit and the detection unit, the auxiliary unit is provided with a telescopic auxiliary detection rod, and when the sampling part of the test paper is transmitted to the position of the detection port of the detection unit, the auxiliary detection rod enables the sampling part of the test paper to be tightly attached to the detection port.

In some embodiments of the invention, the sampling assembly comprises:

the supporting plate is connected with the rack;

a drive plate having a cam mechanism;

the driving piece is connected with the cam mechanism so as to drive the driving plate to reciprocate along a first direction relative to the supporting plate through the cam mechanism;

one end of the strut penetrates through the supporting plate and is connected with the driving plate;

the pressing block is connected to the other end of the support, and part of the test paper is wound on the pressing block;

the reset spring is sleeved on the support column and is positioned between the support plate and the pressing block.

According to some embodiments of the invention, the number of the struts is two, each of the struts being provided with the return spring.

In some embodiments of the invention, the bearing table is provided with a second sensor, and when the to-be-detected certificate is placed on the bearing table, the second sensor generates a sensing signal to control the sampling assembly to press the to-be-detected certificate, so as to perform sampling through the test paper.

According to the detection method of the trace explosives, the method adopts the trace explosive detection device to detect the trace explosives on the certificate to be detected, and comprises the following steps:

placing a certificate to be detected on a bearing table;

a second sensor on the bearing table generates an induction signal to control the sampling assembly to press the certificate to be detected, and sampling is carried out through test paper wound on the sampling assembly;

and transmitting the sampling part of the test paper to a detection unit for detecting the trace explosive.

The method for detecting the trace explosives is convenient to operate, reliable in operation, good in reliability and accuracy of detection results and strong in practicability, can detect the trace explosives information on the certificate while identity verification is carried out on the passenger who passes the inspection, realizes non-inductive detection, improves the trip experience of the passenger, and can be popularized to various places needing explosion-proof detection. Moreover, the test paper can be recycled by arranging the test paper into a plurality of sections of sampling belts with preset use times. When the current sampling area detected the dangerous and explosive article, or the sampling area reached when predetermineeing the use number of times, rotated the test paper to next sampling area and carried out the sampling test, can avoid the sampling area last time to the influence that the testing result caused, effectively avoided the problem of result wrong report.

According to some embodiments of the invention, when the sampling component presses the component to be detected, the test paper rotates forward for a preset distance to wipe the document to be detected so as to sample the document to be detected.

In some embodiments of the present invention, the test paper has a plurality of sampling bands, and when the detection unit completes one detection and no explosive is detected, the test paper is reversely reset to a sampling position; when the detecting unit finishes once and detects the explosive article, or after the sampling band number of times of use reaches the preset number of times of use, the test paper rotates to the next section of sampling band to carry out sampling test, and sends out alarm information when detecting the explosive article.

Drawings

Fig. 1 is a schematic structural diagram of a trace explosive detection device according to an embodiment of the present invention;

FIG. 2 is a schematic structural diagram of a sampling assembly of a trace explosives detection device according to an embodiment of the invention;

FIG. 3 is a schematic diagram showing the positional relationship between the test paper and the detecting unit and the auxiliary unit according to the embodiment of the present invention;

fig. 4 is a flowchart of a trace explosive detection method according to an embodiment of the present invention.

Reference numerals:

the detection apparatus 100 is provided with a detection device,

the number of the racks 10, the carrier table 110,

a sampling assembly 20, a support plate 210, a drive plate 220, a cam mechanism 221, a driving member 230, a support post 240, a pressing block 250, a return spring 260,

the test strips 30 are then placed in a test position,

the detection unit 40, the detection port 410,

the auxiliary unit 50, the auxiliary detection bar 510,

a first wheel 610, a second wheel 620, a first driving motor 710, and a second driving motor 720.

Detailed Description

To further explain the technical means and effects of the present invention adopted to achieve the intended purpose, the present invention will be described in detail with reference to the accompanying drawings and preferred embodiments.

The conventional trace explosive detection mode is usually manual detection, wherein the manual detection is to manually wipe passenger luggage or clothes with test paper, insert the test paper into an equipment sampling port and obtain a result to be detected.

In the prior art, trace explosives are detected simultaneously during certificate verification, and no reliable sampling means is provided, so that information acquisition is lost; when heating analysis is carried out, accurate sampling cannot be carried out, and other pollutants on the test paper are easy to collect; once an alarm occurs, the clean room cannot be completely clean, and false alarm is easily formed in the next detection; after the detection is finished once, the test paper is directly rotated or replaced, so that the waste of the test paper is caused; the test paper is complicated to replace after being worn and damaged along with the increase of the service life, and the maintainability is poor.

The invention mainly designs a detection device 100 and a detection method for trace explosives aiming at the problems, and can reliably wipe contaminants on a certificate to be detected onto the test paper 30 and transmit the contaminants to the detection port 410 by matching the test paper 30 to rotate and wipe through the pretightening force of the cam mechanism 221 and the reset spring 260. Evenly punch on the test paper 30, utilize first sensor discernment, accurate transmission accomplishes accurate sampling. After the sampling area that test paper 30 corresponds reported to the police, this section sampling area no longer revolves, directly gets into next section sampling area sampling test, effectively avoids secondary pollution, causes the problem of wrong report, and test paper 30 can be put up a roll and change, and test paper 30 is rolled up and is adopted butterfly nut fastening, quick replacement. Therefore, the invention improves the reliability of the information acquisition and the accuracy of analysis of the trace explosive, solves the problems of unreliable cleaning and poor maintainability when the test paper is reused, increases the detection efficiency and the detection accuracy and improves the passenger passing-through inspection.

Specifically, as shown in fig. 1, a trace explosive detection apparatus 100 according to an embodiment of the present invention includes: a frame 10, a sampling assembly 20, a test strip 30 and a detection unit 40.

Wherein the housing 10 has a platform 110 for receiving documents to be tested. Therefore, the identity card and passport waiting detection documents can be placed on the bearing platform 110 for detecting the trace explosives.

Referring to fig. 1 and 2, the sampling assembly 20 is disposed on the frame 10, and the sampling assembly 20 is located above the carrier 110 and can move back and forth along a first direction relative to the carrier 110 to switch between a state of pressing and releasing the document to be detected. The "first direction" can be a direction perpendicular to the carrier stage 110 or a direction oblique to the carrier stage 110, and the sampling assembly 20 can move toward or away from the carrier stage 110 along the first direction to press or release the document to be detected.

Part of the test paper 30 is wound around the sampling assembly 20, the test paper 30 has a plurality of sampling strips, and when the sampling assembly 20 presses the document to be detected, the corresponding sampling strips on the test paper 30 contact with the document to be detected and perform sampling. For example, the test paper 30 can be wound around a portion of the sampling assembly 20 that contacts a document to be tested, such that the test paper 30 contacts the document to be tested for sampling when the sampling assembly 20 presses the document to be tested.

The detection unit 40 is arranged on the frame 10 and used for detecting trace explosives at the sampling part of the test paper 30. Therefore, the test paper 30 can be used for detecting trace explosives in the sample of the certificate to be detected;

after the trace explosive detection is completed for one time, if the current sampling band detects an explosive or the sampling band reaches a preset number of times, the test paper 30 rotates to the next sampling band for sampling test before the next sampling detection; if the dangerous explosive is not detected in the current sampling band and the sampling band does not reach the preset use times, the test paper 30 is reversely reset to the current sampling band before next sampling detection, and the sampling test is continued.

For example, the sample strip of each roll of the test paper 30 may be 200 sections, the preset number of times of use of the sample strip may be set to 1000 times, and after the number of times of use of the sample strip reaches 1000 times, the test paper 30 is rotated to the next sample strip for sample testing. It should be understood that the preset number of times is only an example, and is not data that can not be changed, and it is related to the material of the test strip and can be determined according to the wear condition.

The trace explosive detection device 100 provided by the embodiment of the invention has the advantages of simple structure, convenience in operation, good reliability and accuracy of detection results and strong practicability, can detect the trace explosive information on the certificate while the identity of the passenger is verified after passing inspection, realizes non-inductive detection, improves the trip experience of the passenger, and can be popularized to various places needing explosion-proof detection. Also, by providing the test strip 30 as a plurality of sampling strips having a preset number of uses, the test strip 30 can be recycled. When the current sampling area detects a dangerous explosive or reaches the preset use times, the test paper 30 is rotated to the next sampling area for sampling test, so that the influence of the sampling area on the detection result last time can be avoided, and the problem of false alarm of the result is effectively avoided.

According to some embodiments of the present invention, a detection mark is disposed between any two adjacent sampling bands on the test strip 30, and the detection device 100 is provided with a first sensor for detecting the detection mark, so as to perform detection positioning on the test strip 30. In some embodiments of the present invention, the detection mark is a positioning hole, which is disposed near the edge of the test strip 30.

That is, the detecting device 100 is provided with a first sensor, and a positioning hole is formed between any two adjacent sampling bands on the test paper 30. Therefore, the first sensor can detect the positioning hole on the test paper 30 to generate a sensing signal, and the sensing signal is transmitted to the processor, so that the processor controls the rotation or stop of the test paper 30 according to the sensing signal, and the accurate positioning of the test paper 30 is realized. The positioning holes are arranged at the edge positions of the test paper 30, so that the influence of the positioning holes during sampling can be avoided, and the effective sampling area of the test paper 30 is increased.

According to some embodiments of the present invention, as shown in fig. 1, the rack 10 is provided with a first wheel 610 and a second wheel 620, one end of the test strip 30 is fixed to the first wheel 610, the other end of the test strip 30 is fixed to the second wheel 620, a portion of the test strip 30 passes through the sampling assembly 20 and the detecting unit 40, and the test strip 30 is driven between the first wheel 610 and the second wheel 620 when the first wheel 610 and/or the second wheel 620 rotate.

It should be noted that when at least one of the first rotating wheel 610 and the second rotating wheel 620 rotates, the test paper 30 may be wound such that the test paper 30 is transferred between the first rotating wheel 610 and the second rotating wheel 620. Therefore, the sampling position of the test paper 30 can be adjusted, and the sampling position can be moved to the detection unit 40 for detecting the trace explosive.

In some embodiments of the present invention, the frame 10 is provided with a driving motor, and the driving motor is connected to the first wheel 610 and/or the second wheel 620 to drive the first wheel 610 and/or the second wheel 620 to rotate.

For example, a first driving motor 710 connected to the first wheel 610 and a second driving motor 720 connected to the second wheel 620 may be provided to drive the first wheel 610 and the second wheel 620 to rotate by the first driving motor 710 and the second driving motor 720, respectively. Of course, only one driving motor may be connected to the first pulley 610 or the second pulley 620. The driving motor may be a motor that rotates only in a single direction, or may be a driving motor that rotates in both forward and reverse directions.

According to some embodiments of the present invention, as shown in fig. 1 and 3, the detection apparatus 100 further comprises: the auxiliary unit 50, the test strip 30 passes through between the auxiliary unit 50 and the detecting unit 40, the auxiliary unit 50 has an auxiliary detecting rod 510 that can be extended and retracted, when the sampling position of the test strip 30 is transferred to the position of the detecting port 410 of the detecting unit 40, the auxiliary detecting rod 510 makes the sampling position of the test strip 30 closely contact with the detecting port 410.

Therefore, the sampling part of the test paper 30 can be pressed and attached to the detection port 410 of the detection unit 40 through the auxiliary detection rod 510 of the auxiliary unit 50, so as to improve the accuracy and reliability of the detection of the trace explosives.

In some embodiments of the present invention, as shown in FIG. 2, sampling assembly 20 comprises: support plate 210, drive plate 220, driving member 230, support post 240, pressing block 250, and return spring 260.

The supporting plate 210 is connected to the frame 10, the driving plate 220 has a cam mechanism 221, and the driving member 230 is connected to the cam mechanism 221, so that the driving plate 220 is driven by the cam mechanism 221 to reciprocate along a first direction relative to the supporting plate 210.

One end of the support post 240 passes through the support plate 210 and is connected to the drive plate 220, the pressing block 250 is connected to the other end of the support post 240, a portion of the test paper 30 is wound around the pressing block 250, and the return spring 260 is sleeved on the support post 240 and is located between the support plate 210 and the pressing block 250.

Therefore, the cam mechanism 221 can be driven by the driving piece 230 to drive the pressing block 250 to press or release the document to be detected, so as to perform sampling detection on the document to be detected.

According to some embodiments of the present invention, as shown in fig. 2, there are two posts 240, and each post 240 is provided with a return spring 260. Therefore, the stability of the operation of the sampling assembly can be improved.

In some embodiments of the present invention, the bearing platform 110 is provided with a second sensor, and when a document to be detected is placed on the bearing platform 110, the second sensor generates a sensing signal to control the sampling assembly to press the document to be detected, so as to perform sampling through the test paper 30.

It can be understood that by arranging the second sensor, the automatic control of the sampling assembly can be realized through the sensing signal generated by the second sensor, and the convenience of trace explosive detection is improved.

According to the method for detecting the trace explosives, the above trace explosive detection device 100 is adopted to detect the trace explosives on the certificate to be detected, as shown in fig. 4, the method comprises the following steps:

s100, placing the certificate to be detected on a bearing table 110;

s200, a second sensor on the bearing table 110 generates an induction signal to control the sampling assembly to press the certificate to be detected, and sampling is carried out through the test paper 30 wound on the sampling assembly;

s300, transmitting the sampling part of the test paper 30 to the detection unit 40 for detecting the trace explosive.

The method for detecting the trace explosives is convenient to operate, reliable in operation, good in reliability and accuracy of detection results and strong in practicability, can detect the trace explosives information on the certificate while identity verification is carried out on the passenger who passes the inspection, realizes non-inductive detection, improves the trip experience of the passenger, and can be popularized to various places needing explosion-proof detection. Also, by providing the test strip 30 as a plurality of sampling strips having a preset number of uses, the test strip 30 can be recycled. When the current sampling area detects a dangerous explosive or reaches the preset use times, the test paper 30 is rotated to the next sampling area for sampling test, so that the influence of the sampling area on the detection result last time can be avoided, and the problem of false alarm of the result is effectively avoided.

According to some embodiments of the present invention, when the sampling assembly presses the assembly to be detected, the test paper 30 rotates forward a preset distance to wipe the document to be detected, for example, the preset distance may be set to 20mm to sample the document to be detected. Therefore, the reliability of sampling the certificate to be detected can be improved.

In some embodiments of the present invention, when the detection unit 40 completes one detection and no explosives are detected, the test paper 30 is reversely reset to the sampling position, so as to facilitate the trace explosives detection on the next document to be detected. Therefore, the test paper 30 can be repeatedly used, and resource waste is reduced. When the detection unit 40 finishes one time and detects a dangerous explosive, or after the use times of the sampling belt reach the preset use times, the test paper rotates to the next section of the sampling belt for sampling test, and alarm information is sent out when the dangerous explosive is detected.

The following describes in detail the detection apparatus 100 and the detection method of a trace explosive according to the present invention in a specific embodiment with reference to the accompanying drawings. It is to be understood that the following description is only exemplary in nature and should not be taken as a specific limitation on the invention.

The invention provides a non-inductive detection mode for a trace explosive of a to-be-detected certificate, which is used for detecting the information of the trace explosive on the certificate while carrying out identity verification on passenger passing inspection, and improving the travel experience of the passenger.

As shown in fig. 1, a trace explosives detection device 100 according to an embodiment of the invention includes: the test strip tester comprises a frame 10, a sampling assembly 20, a first rotating wheel 610, a second rotating wheel 620, a first driving motor 710, a second driving motor 720, a test strip 30, an auxiliary unit 50 and a detection unit 40.

Wherein the housing 10 has a platform 110 for receiving documents to be tested. Therefore, the identity card and passport waiting detection documents can be placed on the bearing platform 110 for detecting the trace explosives. The plummer 110 is equipped with the second sensor, and when waiting to detect the certificate and place in plummer 110, the second sensor produces inductive signal to control the sampling subassembly and press and wait to detect the certificate, take a sample through test paper 30.

Referring to fig. 1 and 2, the sampling assembly 20 is disposed on the frame 10, and the sampling assembly 20 is located above the carrier 110 and can move back and forth along a first direction relative to the carrier 110 to switch between a state of pressing and releasing the document to be detected.

As shown in fig. 2, the sampling assembly 20 includes: support plate 210, drive plate 220, driving member 230, support post 240, pressing block 250, and return spring 260.

The supporting plate 210 is connected to the frame 10, the driving plate 220 has a cam mechanism 221, and the driving member 230 is connected to the cam mechanism 221, so that the driving plate 220 is driven by the cam mechanism 221 to reciprocate along a first direction relative to the supporting plate 210.

One end of the support post 240 passes through the support plate 210 and is connected to the drive plate 220, the pressing block 250 is connected to the other end of the support post 240, a portion of the test paper 30 is wound around the pressing block 250, and the return spring 260 is sleeved on the support post 240 and is located between the support plate 210 and the pressing block 250. The number of the support posts 240 is two, and each support post 240 is sleeved with a return spring 260. The amount of compression of the return spring 260 varies according to the type (thickness) of the document, so that a certain stress is formed on the surface of the document and the surface of the document is not damaged.

As shown in fig. 1, the first and second rotating wheels 610 and 620 are provided to the holder, one end of the test paper 30 is fixed to the first rotating wheel 610, the other end of the test paper 30 is fixed to the second rotating wheel 620, a portion of the test paper 30 passes through the sampling assembly 20 and the detecting unit 40, and the test paper 30 is driven between the first and second rotating wheels 610 and 620 when the first and second rotating wheels 610 and 620 rotate.

The test strip 30 is partially wound around the sampling assembly 20, the test strip 30 has a plurality of sampling bands, a detection mark is arranged between any two adjacent sampling bands on the test strip 30, the detection mark is a positioning hole, and the positioning hole is arranged near the edge of the test strip 30. The detecting device 100 is provided with a first sensor for detecting the detection mark to detect and position the test paper 30. When the sampling assembly 20 presses the document to be detected, the corresponding sampling strip on the test paper 30 contacts the document to be detected and samples the document. For example, the test paper 30 can be wound around a portion of the sampling assembly 20 that contacts a document to be tested, such that the test paper 30 contacts the document to be tested for sampling when the sampling assembly 20 presses the document to be tested.

The test strip 30 passes through the auxiliary unit 50 and the detecting unit 40, the auxiliary unit 50 has an auxiliary detecting rod 510 that is retractable, and when the sampling portion of the test strip 30 is transferred to the position of the detecting port 410 of the detecting unit 40, the auxiliary detecting rod 510 brings the sampling portion of the test strip 30 into close contact with the detecting port 410.

The method for detecting the trace explosives in the embodiment of the invention adopts the above trace explosive detection device 100 to detect the trace explosives on the certificate to be detected, and as shown in fig. 4, the method comprises the following steps:

s100, placing the certificate to be detected on a bearing table 110;

s200, a sensor on the bearing table 110 generates an induction signal to control the sampling assembly to press the certificate to be detected, and sampling is carried out through the test paper 30 wound on the sampling assembly; when the sampling assembly presses the assembly to be detected, after the assembly is pressed tightly, the driving motor drives the special test paper 30 to rapidly move back and forth for a small distance, and the test paper rubs with the certificate to be detected to obtain trace information of the explosive.

S300, transmitting the sampling part of the test paper 30 to the detection unit 40 for detecting the trace explosive. After the information is collected, the driving motor drives the test paper 30 to roll and rotate, the collected information part is accurately positioned at the inlet of the detection unit 40 (see fig. 3), at this time, the auxiliary detection rod 510 extends out of the auxiliary unit 50, and the point containing the collected information is attached to the detection port 410. And after the detection is finished, releasing or alarming according to the detection result.

When the detection unit 40 does not detect the explosive, the trace explosive detection device 100 is reset to the initial position, so as to detect the trace explosive of the next document to be detected. When the detection unit 40 detects a dangerous explosive, alarm information is sent out.

Test paper 30 rolls up and sets up 200 detection sections altogether, and every detection section can automatic re-setting to initial position when not reporting to the police after detecting, can set up to reuse 5000 times according to the degree of wear, and when the warning is reminded to the system, current detection section will not return to initial position, uses new detection section when next passenger detects, can avoid the false positive. After the whole test paper 30 is rolled up and reaches the wearing and tearing life-span, the butterfly nut of the fixed test paper 30 book of can dismantling carries out quick replacement, and equipment maintenance nature is good.

In summary, the invention designs the unmanned reliable detection device 100 and the detection method for the trace explosive aiming at the requirements of security explosion-proof detection, the detection device 100 has the advantages of simple structure, convenient operation, good reliability and accuracy of the detection result, strong practicability, and can be popularized to various places needing explosion-proof detection. Also, by providing the test strip 30 as a plurality of sampling strips having a preset number of uses, the test strip 30 can be recycled. When the current sampling area detects a dangerous explosive or reaches the preset use times, the test paper 30 is rotated to the next sampling area for sampling test, so that the influence of the sampling area on the detection result last time can be avoided, and the problem of false alarm of the result is effectively avoided.

While the invention has been described in connection with specific embodiments thereof, it is to be understood that it is intended by the appended drawings and description that the invention may be embodied in other specific forms without departing from the spirit or scope of the invention.