CN107193051A - A kind of Terahertz conveyer belt detecting system - Google Patents
A kind of Terahertz conveyer belt detecting system Download PDFInfo
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- CN107193051A CN107193051A CN201710551280.9A CN201710551280A CN107193051A CN 107193051 A CN107193051 A CN 107193051A CN 201710551280 A CN201710551280 A CN 201710551280A CN 107193051 A CN107193051 A CN 107193051A
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- 238000001514 detection method Methods 0.000 claims abstract description 36
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01V—GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
- G01V8/00—Prospecting or detecting by optical means
- G01V8/005—Prospecting or detecting by optical means operating with millimetre waves, e.g. measuring the black losey radiation
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Abstract
The invention discloses a kind of Terahertz conveyer belt detecting system, including conveyer belt, Terahertz light source, terahertz camera and image processing software；In the detection zone of conveyer belt, Terahertz light source and terahertz camera are set, the thz beam that Terahertz light source is sent is projected on terahertz camera through detection zone, the thz beam of reception is converted into data signal by terahertz camera, and image processing software is passed to, image processing software can generate display image according to data signal.The detecting system make use of the mode that thz beam is imaged, belong to the harmless electromagnetic radiation of low-intensity, without ionising radiation, destruction will not be produced to material, compared with X-ray of the prior art, safer more practical, user and operator need not wear safeguard procedures, and system is installed simple easy to use.
Description
Technical field
The present invention relates to field of industry detection, in particular it relates to a kind of Terahertz conveyer belt detecting system.
Background technology
Safe examination system is mainly used in public place of the passenger flows such as airport, railway station, passenger station compared with concentration.To ensure each circuit
And the stable and anti-probably anti-terrorism work of website public security is practicable, safe examination system is occurred gradually in each subway station.
In airport, subway and part factory, now the rays safety detection apparatus for Articles detecting is mostly using X-ray.When to be checked
Product are after x-ray bombardment, and the density and atomic number of material are bigger, and the ratio of material absorbing X-ray also can be bigger.In food
The composition such as protein, carbohydrate, fat, moisture and bone (calcareous), glass (siliceous), metal and hair is penetrated to X
Line has different contribution ratios.X-ray detection system is exactly to be realized according to above-mentioned principle.
But X-ray neutral, when penetrating human body, " secondary " is produced with substance in vivo effect, material is ionized,
This phenomenon is referred to as ionising radiation, and ionising radiation is abnormally dangerous, and prolonged low-intensity irradiation can cause changing for inhereditary material
Become, cause the chronic diseases such as cancer, and the ionising radiation of high intensity can murder in virtually.
So X-ray detecting equipment needs to provide substantial amounts of safeguard procedures and avoids ionising radiation from leaking.While operating personnel
It is also required to be protected to avoid coming to harm.So the characteristics of brings risk on the other hand to also increase to the use of user to be made
Use cost.
Therefore, a kind of safe and harmless detecting system how is designed, is that the technology that those skilled in the art are badly in need of solving is asked
Topic.
The content of the invention
It is an object of the invention to provide a kind of Terahertz conveyer belt detecting system, the Terahertz conveyer belt detecting system is used
The harmless electromagnetic radiation of low-intensity is as detection means, with good practicality and security.
In order to realize above-mentioned technical purpose, the invention provides a kind of Terahertz conveyer belt detecting system, including conveyer belt,
Terahertz light source, terahertz camera and image processing software；In the detection zone of the conveyer belt, the Terahertz light source is set
With the terahertz camera, the thz beam that the Terahertz light source is sent is projected in the terahertz through the detection zone
Hereby on camera, the thz beam of reception is converted into data signal by the terahertz camera, and passes to described image
Software is handled, described image processing software can generate display image according to the data signal.
Optionally, Terahertz light source and the terahertz camera described in two groups are set in the detection zone of the conveyer belt,
First group is horizontally disposed with, and second group is vertically arranged.
Optionally, in horizontally disposed the Terahertz light source and the terahertz camera, the terahertz camera is located at
The side of the conveyer belt, the terahertz camera is located at the opposite side of the conveyer belt, and positioned at the terahertz camera
On center line；In the Terahertz light source being vertically arranged and the terahertz camera, the terahertz camera is located at described pass
The downside of band is sent, the terahertz camera is located at the upside of the conveyer belt, and on the center line of the terahertz camera；
The thz beam that two Terahertz light sources are sent is projected on two terahertz cameras respectively after intersecting.
Optionally, the Terahertz light source and the terahertz camera are fixed in the region to be detected, described to pass
Send Tape movement.
Optionally, the Terahertz light source and the terahertz camera are set by travel mechanism, and the travel mechanism can
Relatively described transmission Tape movement.
Optionally, the Terahertz light source includes radio-frequency signal generator, isolator, output port and radiator fan；It is described to penetrate
The light that frequency generator is sent is exported after the isolator by the output port；The radio-frequency signal generator is by avalanche diode system
Into the output port exports for EIA standard-WR- electromagnetic horns.
Optionally, the output port is provided with cylindrical mirror, antenna sector or reflecting surface, the light of the output port output
Turn into suitable with the test surface size of the terahertz camera by the cylindrical mirror, the antenna sector or the reflecting surface
Thz beam.
Optionally, in addition to power module, the power module is powered to the radio-frequency signal generator；The power module
Input as 220V alternating voltages, be output as 24V, 1.5A constant current.
Optionally, the terahertz camera can carry out high speed detection to the Terahertz information, defeated according to signal intensity
Go out data signal, and the amplified described image that passes to handles software.
Optionally, described image processing software inhouse is provided with gray value, and described image handles software according to the gray value
Generate the display image.
The Terahertz conveyer belt detecting system that the present invention is provided, including conveyer belt, Terahertz light source, terahertz camera and figure
As processing software；In the detection zone of conveyer belt, Terahertz light source and terahertz camera, the terahertz that Terahertz light source is sent are set
Hereby light beam is projected on terahertz camera through detection zone, and the thz beam of reception is converted into digital letter by terahertz camera
Number, and image processing software is passed to, image processing software can generate display image according to data signal.
During using the detecting system, examined object is placed on a moving belt, object and Terahertz light source on conveyer belt
With terahertz camera relative movement, during by detection zone, the thz beam that Terahertz light source is sent passes through examined object,
Project on terahertz camera, the light beam of reception is converted to data signal and passes to image processing software by terahertz camera,
Image processing software can generate display image according to data signal.
The detecting system make use of the method that thz beam is imaged, and belong to the harmless electromagnetic radiation of low-intensity,
Without ionising radiation, destruction, safer more practical compared with X-ray of the prior art, Yong Huhe will not be produced to material
Operator need not wear safeguard procedures, and system is installed simple easy to use.Meanwhile, thz beam has stronger penetrability
With the strong reflection characteristic to metal material, the high-frequency of Terahertz make it that the resolution ratio of imaging is higher, it is possible to be easy to see
To clothing, the cutter in footwear, firearms and other items are hidden in, the detection accuracy of detecting system is improved.
Brief description of the drawings
Accompanying drawing is, for providing a further understanding of the present invention, and to constitute a part for specification, with following tool
Body embodiment is used to explain the present invention together, but is not construed as limiting the invention.
Fig. 1 is a kind of structural representation of embodiment of Terahertz conveyer belt detecting system provided by the present invention；
Fig. 2 be Fig. 1 shown in Terahertz conveyer belt detecting system in Terahertz light source structural representation；
Wherein, the corresponding relation between the reference and component names in Fig. 1 and Fig. 2 is as follows：
Conveyer belt 1；Terahertz camera 2；Terahertz light source 3；Object 4；
Isolator 31；Radiofrequency launcher 32；Power module 33.
Embodiment
The embodiment of the present invention is described in detail below in conjunction with accompanying drawing.It should be appreciated that this place is retouched
The embodiment stated is merely to illustrate and explain the present invention, and is not intended to limit the invention.
Fig. 1 and Fig. 2 are refer to, Fig. 1 is a kind of specific embodiment party of Terahertz conveyer belt detecting system provided by the present invention
The structural representation of formula；Fig. 2 be Fig. 1 shown in Terahertz conveyer belt detecting system in Terahertz light source structural representation.
In a kind of specific embodiment, the invention provides a kind of Terahertz conveyer belt detecting system, including conveyer belt
1st, Terahertz light source 3, terahertz camera 2 and image processing software；In the detection zone of conveyer belt 1, the He of Terahertz light source 3 is set
Terahertz camera 2, the thz beam that Terahertz light source 3 is sent is projected on terahertz camera 2 through detection zone, Terahertz
The thz beam of reception is converted into data signal by camera 2, and passes to image processing software, and image processing software is according to number
Word signal can generate display image.
During using the detecting system, examined object 4 is placed on conveyer belt 1, object 4 and Terahertz light source 3 and terahertz
Hereby camera 2 is relatively moved, when object 4 is by detection zone, and the thz beam that Terahertz light source 3 is sent passes through examined object
4, project on terahertz camera 2, the light beam of reception is converted to terahertz camera 2 into data signal and to pass to image procossing soft
Part, image processing software can generate display image according to data signal.
The detecting system make use of the method that thz beam is imaged, and belong to the harmless electromagnetic radiation of low-intensity,
Without ionising radiation, destruction, safer more practical compared with X-ray of the prior art, Yong Huhe will not be produced to material
Operator need not wear safeguard procedures, and system is installed simple easy to use.Meanwhile, thz beam has stronger penetrability
With the strong reflection characteristic to metal material, the high-frequency of Terahertz make it that the resolution ratio of imaging is higher, it is possible to be easy to see
To clothing, the cutter in footwear, firearms and other items are hidden in, the detection accuracy of detecting system is improved.
In a kind of specific embodiment, two groups of Terahertz light sources 3 and Terahertz phase are set in the detection zone of conveyer belt 1
Machine 2, first group is horizontally disposed with, and second group is vertically arranged.
As shown in figure 1, two Terahertz light sources 3 irradiate examined object 4 from both direction respectively, equivalent to obtaining thing
The projection signal of the both direction of body 4, by the analyzing and processing of the projection signal to both direction, results in more accurate figure
Picture, improves the accuracy rate of detection.
In another embodiment, in horizontally disposed Terahertz light source 3 and terahertz camera 2, terahertz camera 2
Positioned at the side of conveyer belt 2, terahertz camera 2 is located at the opposite side of conveyer belt 1, and on the center line of terahertz camera 2；
In the Terahertz light source 3 and terahertz camera 2 that are vertically arranged, terahertz camera 2 is located at the downside of conveyer belt 1, terahertz camera 2
Positioned at the upside of conveyer belt 1, and on the center line of terahertz camera 2；The thz beam that two Terahertz light sources 3 are sent
It is projected in respectively after intersection on two terahertz cameras 2.
As shown in figure 1, in detection zone, two Terahertz light sources 3 irradiate to be checked with vertical direction from horizontal direction respectively
Object 4 is surveyed, equivalent to the projection signal for obtaining the both direction of object 4, then image processing software is according to the letter of both direction
The display image of number generation object 4, testing staff can judge whether object to be detected 4 is qualified by image.
Further, the thz beam that two Terahertz light sources 3 are sent is projected in two Terahertz phases respectively after intersecting
On machine 2.
In two beam thz beam crossover process, it will not influence each other, all object 4 is irradiated in detection zone, together
When obtain both direction signal.
It is a kind of preferred embodiment in, Terahertz light source 3 and terahertz camera 2 are fixed in region to be detected, pass
Band 1 is sent to move.
During being detected to object 4, object 4 can be placed on conveyer belt 1, the movement of conveyer belt 1 drives
Object 4 moves through detection zone, during by detection zone, and Terahertz light source 3 and terahertz camera 2 can obtain object 4
Whether projection information, judgment object is qualified.
In another preferred embodiment, Terahertz light source 3 and terahertz camera 2 are set by travel mechanism, mobile
Mechanism can be moved relative to conveyer belt 1.
In detection process, can also object 4 it is motionless, Terahertz light source 3 and terahertz camera 2 are moved, and the two passes through movement
Mechanism is set, and is internally formed detection zone in travel mechanism, detection zone is moved with the movement of travel mechanism.During detection,
Object 4 is placed on the upper conveyor belt 1 of conveyer belt 1 and can moved, and can not also move, and travel mechanism's movement can be carried out to object 4
Detection.
In above-mentioned each specific embodiment, Terahertz light source 3 includes radio-frequency signal generator 32, isolator 31 and output end
Mouthful；The light that radio-frequency signal generator 32 is sent is exported after isolator 31 by output port；Radio-frequency signal generator 32 is by avalanche diode system
Into radio-frequency signal generator 32 is additionally provided with radiator fan；Output port exports for EIA standard-WR- electromagnetic horns.
The light that radio-frequency signal generator 32 is sent is exported after isolator 31 by output port, and isolator being capable of blocking reflected letter
Number input, it is to avoid the damage of reflected light and veiling glare to radio-frequency signal generator.
Impact ionization of the avalanche diode application photo-generated carrier in diode depletion layer and obtain photoelectric current
Avalanche multiplication, has the advantages that compact structure, sensitive, quick, it is adaptable to the detection and reception of faint optical signal.By setting
Radiator fan is that radio-frequency signal generator 32 radiates, it is ensured that the reliability of work.
Further, output port is the output of EIA standard-WR- electromagnetic horns, meets international standard, with good simultaneous
Capacitive.
In another specific embodiment, output port is provided with cylindrical mirror, antenna sector or reflecting surface, the output
The light of port output turns into the test surface size with the terahertz camera by the cylindrical mirror, antenna sector or reflecting surface
Suitable thz beam.
Cylindrical mirror is non-spherical lens, spherical aberration and aberration can be effectively reduced, with enlarging function.Cylindrical mirror can also change
Become the size of imaging.
Specifically, also including power module 33, power module 33 is powered to radio-frequency signal generator 32；The input of power module 33
For 220V alternating voltages, 24V, 1.5A constant current are output as.
In above-mentioned each specific embodiment, terahertz camera 2 can carry out high speed detection to Terahertz information, according to
Signal intensity output digit signals, and amplified pass to image processing software.
Terahertz camera 2 is the high-sensitivity camera based on Terahertz Technology, can receive the varying strength for penetrating object
Thz beam, and carry out the last output digit signals of high speed analog-to-digital conversion.
Terahertz camera 2 is fabricated by CMOS technology, and it is strong according to signal to carry out high speed detection to input terahertz signal
Degree output digit signals are exported to image processing software after amplification again.
In above-mentioned each specific embodiment, be provided with gray value inside image processing software, image processing software according to
Gray value generates display image.
Image software carries out high speed image generation according to default gray value and optimized most after data signal is received
The picture for being up to 5000 width per second is provided eventually.Image processing software can to obtain camera acquisition data signal be shown, it is excellent
Change, screen.
It is understood that the principle that embodiment of above is intended to be merely illustrative of the present and the exemplary implementation that uses
Mode, but the invention is not limited in this.For those skilled in the art, the essence of the present invention is not being departed from
In the case of refreshing and essence, various changes and modifications can be made therein, and these variations and modifications are also considered as protection scope of the present invention.
Claims (10)
1. a kind of Terahertz conveyer belt detecting system, it is characterised in that including conveyer belt, Terahertz light source, terahertz camera and
Image processing software；In the detection zone of the conveyer belt, the Terahertz light source and the terahertz camera be set, it is described too
The thz beam that hertz light source is sent is projected on the terahertz camera through the detection zone, the terahertz camera
The thz beam of reception is converted into data signal, and passes to described image processing software, described image processing is soft
Part can generate display image according to the data signal.
2. Terahertz conveyer belt detecting system as claimed in claim 1, it is characterised in that in the detection zone of the conveyer belt
Terahertz light source described in two groups and the terahertz camera are set, and first group is horizontally disposed with, and second group is vertically arranged.
3. Terahertz conveyer belt detecting system as claimed in claim 2, it is characterised in that the horizontally disposed terahertz light
In source and the terahertz camera, the terahertz camera is located at the side of the conveyer belt, and the terahertz camera is located at institute
The opposite side of conveyer belt is stated, and on the center line of the terahertz camera；The Terahertz light source being vertically arranged and institute
State in terahertz camera, the terahertz camera is located at the downside of the conveyer belt, the terahertz camera is located at the transmission
The upside of band, and on the center line of the terahertz camera；The terahertz light that two Terahertz light sources are sent
Beam is projected on two terahertz cameras respectively after intersecting.
4. Terahertz conveyer belt detecting system as claimed in claim 3, it is characterised in that the Terahertz light source and it is described too
Hertz camera is fixed in the region to be detected, the transmission Tape movement.
5. Terahertz conveyer belt detecting system as claimed in claim 3, it is characterised in that the Terahertz light source and it is described too
Hertz camera is set by travel mechanism, and the travel mechanism can relatively described transmission Tape movement.
6. the Terahertz conveyer belt detecting system as described in any one of claim 1 to 5, it is characterised in that the terahertz light
Source includes radio-frequency signal generator, isolator, output port and radiator fan；The light that the radio-frequency signal generator is sent is through the isolator
Exported afterwards by the output port；The radio-frequency signal generator is made up of avalanche diode, and the output port is EIA standards-WR-
Electromagnetic horn is exported.
7. Terahertz conveyer belt detecting system as claimed in claim 6, it is characterised in that the output port is provided with cylinder
Mirror, antenna sector or reflecting surface, the light of the output port output pass through the cylindrical mirror, the antenna sector or described
Reflecting surface turns into the thz beam suitable with the test surface size of the terahertz camera.
8. Terahertz conveyer belt detecting system as claimed in claim 7, it is characterised in that also including power module, the electricity
Source module is powered to the radio-frequency signal generator；The input of the power module is 220V alternating voltages, is output as 24V, 1.5A's
Constant current.
9. the Terahertz conveyer belt detecting system as described in any one of claim 1 to 5, it is characterised in that the Terahertz phase
Machine can carry out high speed detection to the Terahertz information, according to signal intensity output digit signals, and amplified transmission
Software is handled to described image.
10. the Terahertz conveyer belt detecting system as described in any one of claim 1 to 5, it is characterised in that described image processing
Software inhouse is provided with gray value, and described image handles software and generates the display image according to the gray value.
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| CN201710551280.9A CN107193051A (en) | 2017-07-07 | 2017-07-07 | A kind of Terahertz conveyer belt detecting system |
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| CN108490497A (en) * | 2018-02-05 | 2018-09-04 | 清华大学 | Safe examination system and method |
| CN108490497B (en) * | 2018-02-05 | 2024-03-22 | 清华大学 | Security inspection system and method |
| CN109031285A (en) * | 2018-09-03 | 2018-12-18 | 苏州耶拿微电子有限公司 | It is a kind of to store with analytic function with portrait convenient for vehicular Terahertz safety check instrument |
| CN109031285B (en) * | 2018-09-03 | 2020-12-08 | 嘉兴腓特烈太赫科技有限公司 | Vehicle-mounted terahertz security check instrument convenient to carry and having portrait storage and analysis functions |
| CN111175840A (en) * | 2020-01-15 | 2020-05-19 | 河南中光学集团有限公司 | Hazardous article security inspection system based on terahertz imaging technology and security inspection method thereof |
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Application publication date: 20170922 |