CN108828682B - Multi-channel explosive and drug detector - Google Patents
Multi-channel explosive and drug detector Download PDFInfo
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- CN108828682B CN108828682B CN201810549516.XA CN201810549516A CN108828682B CN 108828682 B CN108828682 B CN 108828682B CN 201810549516 A CN201810549516 A CN 201810549516A CN 108828682 B CN108828682 B CN 108828682B
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- G01V—GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
- G01V8/00—Prospecting or detecting by optical means
- G01V8/10—Detecting, e.g. by using light barriers
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- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
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- G—PHYSICS
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- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/62—Systems in which the material investigated is excited whereby it emits light or causes a change in wavelength of the incident light
- G01N21/63—Systems in which the material investigated is excited whereby it emits light or causes a change in wavelength of the incident light optically excited
- G01N21/64—Fluorescence; Phosphorescence
- G01N21/6428—Measuring fluorescence of fluorescent products of reactions or of fluorochrome labelled reactive substances, e.g. measuring quenching effects, using measuring "optrodes"
- G01N21/643—Measuring fluorescence of fluorescent products of reactions or of fluorochrome labelled reactive substances, e.g. measuring quenching effects, using measuring "optrodes" non-biological material
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- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/62—Systems in which the material investigated is excited whereby it emits light or causes a change in wavelength of the incident light
- G01N21/63—Systems in which the material investigated is excited whereby it emits light or causes a change in wavelength of the incident light optically excited
- G01N21/64—Fluorescence; Phosphorescence
- G01N21/6428—Measuring fluorescence of fluorescent products of reactions or of fluorochrome labelled reactive substances, e.g. measuring quenching effects, using measuring "optrodes"
- G01N2021/6432—Quenching
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Abstract
The invention relates to the field of detectors and discloses a multi-channel explosive and drug detector.A sample collecting device comprises an air cavity, a heater and a micro air pump, wherein one end of the air cavity is connected with the heater, the other end of the air cavity is connected with the micro air pump, a first light propagation channel is communicated with a second light propagation channel, one end of the first light propagation channel is communicated with the cavity of the air cavity, a detection device comprises a carrier, a sample detection layer is arranged at the front end of the carrier, the other end of the carrier is detachably and hermetically connected with the first light propagation channel, and the sample detection layer is inserted into the air cavity by the carrier; the heater is provided with an air inlet pipe and three detection inlets, and the number of the sample detection layers is three; 3 groups of fluorescence detection assemblies are arranged in the first light propagation channel, and the number and the type of the fluorescence detection assemblies correspond to the number and the type of the sample detection layers one by one; and a light source is arranged in the second light transmission channel, and the light source enters the first light transmission channelization through the second light transmission channel. The device has the advantages of accurate detection, wide detection range and the like.
Description
Technical Field
The invention relates to an unmanned detector, in particular to a multi-channel explosive and drug detector.
Background
When the high molecular material is irradiated by the LED or other blue-violet light, fluorescence can be generated; when trace steam of explosives is quenched by fluorescence, the characteristic of high molecular materials is used for detecting the explosives. The existing explosive detector uses a fragile glass capillary type optical waveguide, so that the equipment is large in size, complex in internal system structure, high in manufacturing cost and incapable of identifying explosives. Therefore, it is highly desirable to simplify the internal structure of explosives detectors, reduce their manufacturing cost, and identify explosives.
The invention has the patent number of 201310478635.8, the patent name of Chinese invention patent of an explosive and drug detector provides a more reasonable technical scheme for solving the technical problems, and has the advantages of simple structure, high sample replacement speed and the like. However, the technical problem still exists in that the technical scheme can only detect one explosive or drug, the real environment is complex, and multiple explosives or drugs may need to be detected simultaneously.
Disclosure of Invention
The invention provides a multi-channel explosive and drug detector aiming at the defects in the prior art.
In order to solve the technical problem, the invention is solved by the following technical scheme:
a multi-channel detector for explosives and drugs comprises a shell, an optical signal transmission device and a detection device are arranged in the shell, the detection device comprises a carrier, the sample detection layer is provided with the front end of the carrier, the other end of the carrier is detachably and hermetically connected with the first light propagation channel, and the sample detection layer is inserted into the air cavity by the carrier; the heater is provided with an air inlet pipe and a detection inlet, and the sample detection layers are at least two types and are independently arranged at the front end of the carrier without interfering with each other; at least two groups of fluorescence detection assemblies are arranged in the first light propagation channel, and the number and the type of the fluorescence detection assemblies correspond to the number and the type of the sample detection layers one to one; a light source is arranged in the second light transmission channel, the light source enters the first light transmission channel through the second light transmission channel and then is converged and irradiated on different sample detection layers to generate fluorescence with different wavelengths, the fluorescence with different wavelengths is filtered by the corresponding fluorescence detection components and then is irradiated on photosensitive detectors, and the number of the photosensitive detectors corresponds to the number of the fluorescence detection components one to one; the miniature air pump sucks explosive steam or drugs into the air cavity from the detection inlet steam to perform fluorescence quenching reaction with substances on the sample detection layer, and the photosensitive detector detects corresponding fluorescence intensity change. The device adopts the different sample detection layer of multiunit to can accomplish the detection of multiple explosive or drugs, though the data bulk of curve is very little and the function is very strong because of the speed of singlechip and treater is very fast, so the mutual detection of the device does not influence each other, and the circuit board can be one moreover, and the display screen also can be one, and it can show different material subregion.
Preferably, the fluorescence detection assembly comprises a first converging lens, a first band-pass filter and a second converging lens, and the fluorescence is converged on the photosensitive detector through the first converging lens, the first band-pass filter and the second converging lens in sequence. The first band-pass filter only transmits light with the peak wavelength of +/-5 nm corresponding to the fluorescence quenching peak of the explosive, so that different fluorescence quenches are not influenced mutually.
Preferably, the light source is a purple light emitting diode, and a third converging lens, ground glass, a collimating lens, a second band-pass filter and a fourth converging lens are further arranged in the second light propagation channel; a baffle made of black opaque materials is arranged on one side of emergent light of the ground glass, a light hole is formed in the baffle, the orthographic projection point of the light hole on the ground glass is an object point of the third convergent lens, and the point where the sample detection layer is located is an image point of the fourth convergent lens; light rays are emitted by the light source and sequentially pass through the third converging lens, the ground glass, the light holes, the collimating lens, the second band-pass filter and the fourth converging lens to irradiate on the sample detection layer, the sample detection layer emits fluorescence, and the fluorescence enters the fluorescence detection assembly. The third converging lens reduces and converges the emitted LED light, the reduced light becomes an object point which emits light uniformly through ground glass, and the light of the object point irradiates the collimating lens 25 through the light hole 24 to obtain parallel light. Because the light on the ground glass has high uniform density, the light irradiated on the photosensitive material has high uniform density, and the fluorescence released by the photosensitive material has high uniform density, the device can quickly detect trace explosives and narcotics. The second band-pass filter is a short-pass filter, the short-pass filter filters light with a wavelength longer than that of the LED light, the LED light is finally irradiated on the sample detection layer by the fourth convergent lens, the first band-pass filter is a long-pass filter, and the long-pass filter can filter the LED light with a shorter wavelength, so that the LED light cannot be transmitted to the photosensitive detector after being filtered by the short-pass filter and the long-pass filter; and the fluorescence can be smoothly converged on the photosensitive detector through the first converging lens, the first band-pass filter and the second converging lens.
Preferably, the first light propagation channel and the second light propagation channel are vertically arranged, the second light propagation channel is connected to the middle of the first light propagation channel, a first 45-degree beam splitter is arranged at the joint of the second light propagation channel and the first light propagation channel, the light source is a purple light emitting diode, a third convergent lens, ground glass, a collimating lens and a second band-pass filter are further arranged in the second light propagation channel, a baffle made of black opaque material is arranged on one side of emergent light of the ground glass, a light hole is formed in the baffle, the point of the orthographic projection of the light hole on the ground glass is the object point of the third convergent lens, and the point of the sample detection layer is the image point of the fourth convergent lens; the light is emitted by the light source and sequentially passes through the third converging lens, the ground glass, the light hole, the collimating lens, the second band-pass filter, the first 45-degree beam splitter and the first converging lens to be irradiated on the sample detection layer; the axis of the fluorescence detection assembly is perpendicular to the first light propagation channel, second 45-degree beam splitting sheets which are in one-to-one correspondence with the fluorescence assemblies are further arranged in the first light propagation channel, and fluorescence is deflected into the fluorescence detection assembly through the first 45-degree beam splitting sheets of the first convergent lens without deflection and is directly deflected to the second 45-degree beam splitting sheets. By adopting the structure, the first light transmission channel and the second light transmission channel are vertically arranged, and the processing is more convenient.
Preferably, the detection device further comprises a detection device placing table, and the carrier is embedded in the detection device placing table and is fixed and sealed by a cap; the air cavity is provided with an isolation window, the isolation window is arranged above the sample detection layer, an antireflection film is arranged on the outer side of the isolation window, the isolation window can ensure that fluorescence enters the first light transmission channel, and the antireflection film can prevent water vapor from fogging to influence light transmission. And the replacement is convenient.
Preferably, the support is an aluminum rod.
Preferably, the front end of the carrier is provided with a capillary, different areas of the inner wall of the capillary are coated with different sample detection layers, and the sample detection layers are coated on the inner side of the capillary, so that the situation that the sample detection layers are rubbed in the replacement process to cause insufficient fluorescence quantity and cause insufficient detection sensitivity is avoided.
Preferably, the sample detection layers are all made of photosensitive materials, and the number of the sample detection layers is three, namely, the nitro-group explosive sample detection layer, the peroxide explosive sample detection layer and the drug sample detection layer. So that a plurality of explosives and drugs can be detected simultaneously.
Preferably, the photosensitive detector further comprises a circuit board and a spectrum display instrument, the photosensitive detector comprises a photodiode or a photomultiplier or an avalanche diode, the fluorescent light is converged on the photodiode or the photomultiplier or the avalanche diode through the second converging lens, the photodiode or the photomultiplier or the avalanche diode is in point connection with the circuit board, and the photodiode or the photomultiplier or the avalanche diode is connected with the spectrum display instrument through the circuit board.
By adopting the technical scheme, the invention has the following beneficial effects:
the invention provides: the photosensitive detector can feed back different extinction curves to the spectrum display instrument, so that people can distinguish different detection substances conveniently; the detector can detect various dangerous goods simultaneously, greatly reduces the detection cost and the equipment space, and improves the detection speed; the device adopts the capillary to be used for detecting the coating on layer, not only can guarantee that the scraping can not appear in the detection layer, removes external influence from, improves life, can reduce the section variable area on detection layer moreover for light assembles more easily. The 45-degree beam splitter, the short-pass filter and the long-pass filter can filter LED light, so that only fluorescence is received on the photosensitive detector, and a high signal-to-noise ratio is achieved; the heater can enable explosive substances which do not generate trace steam to generate trace steam; the sample detection layer is fixed on the carrier, and the replacement of the sample detection layer can be simply and quickly realized by replacing the carrier.
Drawings
FIG. 1 is a schematic structural view of example 1;
FIG. 2 is a schematic view of the structure of the isolation window of FIG. 1;
FIG. 3 is a schematic structural view of a capillary tube according to example 2;
FIG. 4 is a schematic structural view of embodiment 3.
Reference numerals in the drawings correspond to the following technical names: 1-first light propagation channel, 2-second light propagation channel, 65-sample detection layer, 5-air cavity, 4-micro air pump, 61-carrier, 3-heater, 31-air inlet pipe, 32-detection inlet, 21-light source, 85-photosensitive detector, 73-first convergent lens, 74-first band-pass filter, 76-second convergent lens, 22-third convergent lens, 23-ground glass, 24-light hole, 25-collimating lens, 26-second band-pass filter, 27-fourth convergent lens, 14-first 45-degree beam splitter, 69-second 45-degree beam splitter, and 62-placing table.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and examples.
Example 1
As shown in fig. 1 and 2, the multi-channel explosive and drug detector comprises a housing, a metal housing with a transparent tail, an optical signal transmission device, a detection device, a sample collection device and a photosensitive detector 85, wherein the optical signal transmission device comprises a first optical transmission channel 1 and a second optical transmission channel 2, the detection device comprises a replaceable sample detection layer 65, the sample detection layer 65 is made of photosensitive material, the sample detection layer 65 generates fluorescence under the irradiation of LED light, the sample collection device comprises an air cavity 5, a heater 3 and a micro air pump 4, one end of the air cavity 5 is connected with the heater 3, the other end of the air cavity 5 is connected with the micro air pump 4, the first optical transmission channel 1 is communicated with the second optical transmission channel 2, one end of the first optical transmission channel 1 is communicated with the cavity of the air cavity 5, the detection device comprises a carrier 61, the sample detection layer 65 is provided with the front end of the carrier 61, the other end of the carrier 61 is detachably and hermetically connected with the first light propagation channel 1, and the sample detection layer 65 is inserted into the air cavity 5 by the carrier 61; the heater 3 is provided with an air inlet pipe 31 and a detection inlet 32, and the sample detection layers 65 are three in type and are independently arranged at the front end of the carrier 61 without interfering with each other; three groups of fluorescence detection components are arranged in the first light propagation channel 1, and the fluorescence detection components correspond to the sample detection layers 65 one by one; a light source 21 is arranged in the second light transmission channel 2, the light source 21 enters the first light transmission channel 1 through the second light transmission channel 2 and then converges and irradiates on different sample detection layers 65 to generate fluorescence with different wavelengths, the fluorescence with different wavelengths is filtered by corresponding fluorescence detection components and irradiates on a photosensitive detector 85, and the number of the photosensitive detectors 85 is in one-to-one correspondence with the number of the fluorescence detection components; the miniature air pump 4 sucks explosive steam or drugs into the air cavity 5 from the steam of the detection inlet 32 and the substances of the sample detection layer 65 to perform fluorescence quenching reaction, the photosensitive detector 85 detects corresponding fluorescence intensity change, the pumped gas is discharged from the gas outlet 41, the reduced gas in the air cavity 5 is supplemented and enters through the gas inlet pipe 31, and if the explosive or drugs do not volatilize at normal temperature, the heater 3 is started to heat, so that the detector can accurately judge.
The three groups of fluorescent components are arranged in parallel in the first light propagation channel 1, the fluorescent detection component comprises a first converging lens 73, a first band-pass filter 74 and a second converging lens 76, fluorescent light sequentially passes through the first converging lens 73, the first band-pass filter 74 and the second converging lens 76 and is converged on a photosensitive detector 85, wherein the first light propagation channel 1 and the second light propagation channel 2 are arranged at a certain included angle, the first light propagation channel 1 is connected to one end of the second light propagation channel 2, and the carrier 61 is arranged at the connection position of the first light propagation channel 1 and the second light propagation channel 2. The light source 21 is a purple light emitting diode, and a third convergent lens 22, ground glass 23, a collimating lens 25, a second band-pass filter 26 and a fourth convergent lens 27 are further arranged in the second light propagation channel 2; a baffle made of black opaque material is arranged on one side of the ground glass 23 for emitting light, a light hole 24 is formed in the baffle, the orthographic projection point of the light hole 24 on the ground glass 23 is an object point of the third convergent lens 22, and the point where the sample detection layer 65 is located is an image point of the fourth convergent lens 27; the light is emitted by the light source 21 and sequentially passes through the third converging lens 22, the ground glass 23, the light hole 24, the collimating lens 25, the second band-pass filter 26 and the fourth converging lens 27 to irradiate on the sample detection layer 65, the sample detection layer 65 emits fluorescence, the fluorescence enters the fluorescence detection assembly and is converged on the photosensitive detector 85 through the fluorescence detection assembly, the detection device further comprises a detection device placing table 6, and the carrier 61 is embedded into the detection device placing table 6 and is fixed and sealed by a cap 62; an isolation window 51 is arranged on the air cavity 5, the isolation window 51 is arranged above the sample detection layer 65, and an antireflection film 52 is arranged on the outer side of the isolation window 51. Anti-reflection film 52 prevents condensation of water mist which may be generated due to the difference in temperature between the inside and outside of air chamber 5 during heating.
The second band-pass filter 23 is a short-pass filter which filters light with a wavelength longer than that of the LED light, the LED light is finally irradiated on the sample detection layer 65 by the fourth converging lens 27, the first band-pass filter 74 is a long-pass filter which can filter LED light with a shorter wavelength, and therefore, the LED light is not transmitted to the photosensitive detector 85 after being filtered by the short-pass filter and the long-pass filter; and the fluorescence can be smoothly condensed onto the photosensitive detector 85 through the first condensing lens 73, the first band-pass filter 74 and the second condensing lens 76.
The carrier 61 is an aluminum bar, the sample detection layers 65 are all made of photosensitive materials, the number of the sample detection layers is 3, the sample detection layers are respectively a nitro explosive sample detection layer 65, a peroxide explosive TATP sample detection layer 65 and a drug sample detection layer 65, and the nitro explosive sample detection layer, the peroxide explosive TATP sample detection layer and the drug sample detection layer 65 are coated on the aluminum bar.
The photosensitive detector 85 further comprises a circuit board 80 and a spectrum display instrument 90, the photosensitive detector 85 comprises a photodiode or a photomultiplier or an avalanche diode, the fluorescent light is converged on the photodiode or the photomultiplier or the avalanche diode through a second converging lens 76, the photodiode or the photomultiplier or the avalanche diode is in point connection with the circuit board 80, the photodiode or the photomultiplier or the avalanche diode is connected with the spectrum display instrument 90 through the circuit board 80, the three photodiode or the photomultiplier or the avalanche diode are connected with the same circuit board 80, and the electric signals are displayed on the spectrum display instrument 90 in a waveform mode.
The whole process of the device is that, light emitted by the light source 21 is converged on the sample detection layer through the second light transmission channel 2, thereby generating fluorescence with different wavelengths, after the fluorescence and the rest of LED light are filtered through the fluorescence detection component in the first light transmission channel 1, the fluorescence passes through, the rest of LED light is filtered, the fluorescence is finally converged on the photosensitive detector 85, the light signal is converted into an electric signal and then displayed on the spectrum display instrument 90 in a waveform form, when steam generated by drugs or explosives enters the air cavity 5 through the detection inlet 32 and carries out quenching reaction with the corresponding sample detection layer, thereby the corresponding fluorescence intensity is changed, the display is changed on the spectrum display instrument 90 as the waveform, and the judgment of a user is facilitated.
Example 2
As shown in fig. 3, the present embodiment is different from embodiment 1 in that a capillary 610 is disposed at the front end of the carrier 61, different sample detection layers 65 are coated on different areas of the inner wall of the capillary 610, light focusing is simpler and more convenient, and the sample detection layers 65 are not scratched by the outside, resulting in longer service life.
Example 3
As shown in fig. 4, the present embodiment is different from embodiment 1 in that a "T" shape is vertically provided between the first light propagation channel 1 and the second light propagation channel 2. The first light transmission channel 1 and the second light transmission channel 2 are vertically arranged, the second light transmission channel 2 is connected to the middle of the first light transmission channel 1, a first 45-degree beam splitter 14 is arranged at the joint of the second light transmission channel 2 and the first light transmission channel 1, the light source 21 is a purple light emitting diode, a third convergent lens 22, ground glass 23, a collimating lens 25 and a second band-pass filter 26 are further arranged in the second light transmission channel 2, a baffle made of black opaque materials is arranged on one side of emergent light of the ground glass 23, a light hole 24 is formed in the baffle, a point of the orthographic projection of the light hole 24 on the ground glass 23 is an object point of the third convergent lens 22, and a point where the sample detection layer 65 is located is an image point of a fourth convergent lens 27; the light emitted by the light source 21 sequentially passes through the third converging lens 22, the ground glass 23, the light hole 24, the collimating lens 25, the second band-pass filter 26, the first 45-degree beam splitter 14 and the first converging lens 73 and irradiates on the sample detection layer 65; the axis of the fluorescence detection assembly is perpendicular to the first light propagation channel 1, the second 45-degree beam splitter 69 corresponding to the fluorescence assembly one by one is further arranged in the first light propagation channel 1, and the fluorescence passes through the first converging lens 73, is not deflected by the first 45-degree beam splitter 14, and is deflected to the second 45-degree beam splitter 69 to enter the fluorescence detection assembly. The same differences as described in this example apply to example 2.
In summary, the above-mentioned embodiments are only preferred embodiments of the present invention, and all equivalent changes and modifications made in the claims of the present invention should be covered by the claims of the present invention.
Claims (4)
1. Multichannel formula explosive and drugs detector, including the casing, be provided with light signal propagation device, detection device, sample collection device and photosensitive detector (85) in the casing, its characterized in that: the optical signal propagation device comprises a first optical propagation channel (1) and a second optical propagation channel (2), the detection device comprises a replaceable sample detection layer (65), the sample detection layer (65) is made of photosensitive materials, the sample detection layer (65) generates fluorescence under the irradiation of LED light, the sample collection device comprises an air cavity (5), a heater (3) and a micro air pump (4), one end of the air cavity (5) is connected with the heater (3), the other end of the air cavity (5) is connected with the micro air pump (4), the first optical propagation channel (1) is communicated with the second optical propagation channel (2), one end of the first optical propagation channel (1) is communicated with the cavity of the air cavity (5), the detection device comprises a carrier (61), the sample detection layer (65) is provided with the front end of the carrier (61), and the other end of the carrier (61) is detachably connected with the first optical propagation channel (1) in a sealing manner, the carrier (61) inserts the sample detection layer (65) into the air cavity (5); the heater (3) is provided with an air inlet pipe (31) and a detection inlet (32), and the sample detection layer (65) is at least two types and is independently arranged at the front end of the carrier (61) without interfering with each other; at least two groups of fluorescence detection assemblies are arranged in the first light propagation channel (1), and the number and the types of the fluorescence detection assemblies correspond to the number and the types of the sample detection layers (65) one by one; a light source (21) is arranged in the second light transmission channel (2), the light source (21) enters the first light transmission channel (1) through the second light transmission channel (2) and then is converged and irradiated on different sample detection layers (65) to generate fluorescence with different wavelengths, the fluorescence with different wavelengths is filtered by corresponding fluorescence detection components and then is irradiated on a photosensitive detector (85), and the number of the photosensitive detectors (85) corresponds to the number of the fluorescence detection components one to one; the miniature air pump (4) sucks explosive steam or drugs into the air cavity (5) from the steam of the detection inlet (32) to perform fluorescence quenching reaction with substances of the sample detection layer (65), and the photosensitive detector (85) detects corresponding fluorescence intensity change; the micro air pump (4) is connected with an air outlet (41); the fluorescence detection assembly comprises a first converging lens (73), a first band-pass filter (74) and a second converging lens (76), and fluorescence sequentially passes through the first converging lens (73), the first band-pass filter (74) and the second converging lens (76) to be converged on the photosensitive detector (85); the first light transmission channel (1) and the second light transmission channel (2) are vertically arranged, the second light transmission channel (2) is connected with the middle part of the first light transmission channel (1), a first 45-degree beam splitter (14) is arranged in the joint of the second light transmission channel (2) and the first light transmission channel (1), the light source (21) is a purple light emitting diode, a third convergent lens (22) and ground glass (23) are also arranged in the second light transmission channel (2), the device comprises a collimating lens (25) and a second band-pass filter (26), wherein a baffle made of black opaque materials is arranged on one side of emergent light of ground glass (23), a light hole (24) is formed in the baffle, the orthographic projection point of the light hole (24) on the ground glass (23) is an object point of a third convergent lens (22), and the point where a sample detection layer (65) is located is an image point of a fourth convergent lens (27); the light is emitted by a light source (21) and sequentially passes through a third convergent lens (22), ground glass (23), a light hole (24), a collimating lens (25), a second band-pass filter (26), a first 45-degree beam splitter (14) and a first convergent lens (73) to be irradiated on a sample detection layer (65); the axis of the fluorescence detection component is perpendicular to the first light propagation channel (1), second 45-degree beam splitting sheets (69) which are in one-to-one correspondence with the fluorescence component are further arranged in the first light propagation channel (1), and fluorescence is deflected into the fluorescence detection component through the first converging lens (73) and the first 45-degree beam splitting sheets (14) without deflection and is deflected to the second 45-degree beam splitting sheets (69); the detection device also comprises a detection device placing table (6), and the carrier (61) is embedded into the detection device placing table (6) and is fixed and sealed by a cap (62); an isolation window (51) is arranged on the air cavity (5), the isolation window (51) is arranged above the sample detection layer (65), and an anti-reflection film (52) is arranged on the outer side of the isolation window (51); the carrier (61) is an aluminum bar.
2. A multi-channel explosives and drugs detector in accordance with claim 1, wherein: the front end of the carrier (61) is provided with a capillary (610), and different areas of the inner wall of the capillary (610) are coated with different sample detection layers (65).
3. A multi-channel explosives and drugs detector according to claim 1 or 2 characterised by: the sample detection layers (65) are all made of photosensitive materials, the number of the sample detection layers (65) is three, and the three sample detection layers are respectively a nitro explosive sample detection layer (65), a peroxy compound explosive (TATP) sample detection layer (65) and a drug sample detection layer (65).
4. A multi-channel explosives and drugs detector in accordance with claim 1, wherein: the photosensitive detector (85) further comprises a circuit board (80) and a spectrum display instrument (90), the photosensitive detector (85) comprises a photodiode or a photomultiplier or an avalanche diode, the fluorescent light is converged on the photodiode or the photomultiplier or the avalanche diode through a second converging lens (76), the photodiode or the photomultiplier or the avalanche diode is in point connection with the circuit board (80), and the photodiode or the photomultiplier or the avalanche diode is connected with the spectrum display instrument (90) through the circuit board (80).
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| CN112683863A (en) * | 2020-12-11 | 2021-04-20 | 深圳砺剑防卫技术有限公司 | Multimode fluorescence detector and detection method thereof |
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| CN103852454A (en) * | 2012-12-06 | 2014-06-11 | 武汉鹰飞拓光电子有限公司 | Portable explosive material and narcotic drug detector |
| CN103543476B (en) * | 2013-10-12 | 2016-06-15 | 杭州芬得检测技术有限公司 | A kind of explosive and drug detector |
| CN206208749U (en) * | 2016-08-31 | 2017-05-31 | 河南省智仪系统工程有限公司 | Single beam multi-wavelength flue gas inspection sensing device |
| CN107966426A (en) * | 2017-12-06 | 2018-04-27 | 安徽昱远智能科技有限公司 | A kind of multichannel trace explosive detection instrument |
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2018
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