CN108387593A - A kind of CT detection devices - Google Patents
A kind of CT detection devices Download PDFInfo
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- CN108387593A CN108387593A CN201711319391.3A CN201711319391A CN108387593A CN 108387593 A CN108387593 A CN 108387593A CN 201711319391 A CN201711319391 A CN 201711319391A CN 108387593 A CN108387593 A CN 108387593A
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- energy detector
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- 238000001514 detection method Methods 0.000 title claims abstract description 34
- 239000000523 sample Substances 0.000 claims abstract description 32
- 239000000758 substrate Substances 0.000 claims description 17
- 239000000463 material Substances 0.000 claims description 8
- 230000005540 biological transmission Effects 0.000 claims description 7
- 238000001914 filtration Methods 0.000 claims description 7
- 229910000838 Al alloy Inorganic materials 0.000 claims description 3
- 229910000881 Cu alloy Inorganic materials 0.000 claims description 3
- 229910001021 Ferroalloy Inorganic materials 0.000 claims description 3
- 238000005058 metal casting Methods 0.000 claims description 3
- 238000010276 construction Methods 0.000 claims description 2
- 230000003287 optical effect Effects 0.000 claims description 2
- 230000005611 electricity Effects 0.000 claims 1
- 238000003384 imaging method Methods 0.000 abstract description 4
- 230000007547 defect Effects 0.000 abstract description 2
- 238000005516 engineering process Methods 0.000 description 4
- 241000276425 Xiphophorus maculatus Species 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000004364 calculation method Methods 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N23/00—Investigating or analysing materials by the use of wave or particle radiation, e.g. X-rays or neutrons, not covered by groups G01N3/00 – G01N17/00, G01N21/00 or G01N22/00
- G01N23/02—Investigating or analysing materials by the use of wave or particle radiation, e.g. X-rays or neutrons, not covered by groups G01N3/00 – G01N17/00, G01N21/00 or G01N22/00 by transmitting the radiation through the material
- G01N23/04—Investigating or analysing materials by the use of wave or particle radiation, e.g. X-rays or neutrons, not covered by groups G01N3/00 – G01N17/00, G01N21/00 or G01N22/00 by transmitting the radiation through the material and forming images of the material
- G01N23/046—Investigating or analysing materials by the use of wave or particle radiation, e.g. X-rays or neutrons, not covered by groups G01N3/00 – G01N17/00, G01N21/00 or G01N22/00 by transmitting the radiation through the material and forming images of the material using tomography, e.g. computed tomography [CT]
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01V—GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
- G01V5/00—Prospecting or detecting by the use of ionising radiation, e.g. of natural or induced radioactivity
- G01V5/20—Detecting prohibited goods, e.g. weapons, explosives, hazardous substances, contraband or smuggled objects
- G01V5/22—Active interrogation, i.e. by irradiating objects or goods using external radiation sources, e.g. using gamma rays or cosmic rays
- G01V5/224—Multiple energy techniques using one type of radiation, e.g. X-rays of different energies
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01V—GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
- G01V5/00—Prospecting or detecting by the use of ionising radiation, e.g. of natural or induced radioactivity
- G01V5/20—Detecting prohibited goods, e.g. weapons, explosives, hazardous substances, contraband or smuggled objects
- G01V5/22—Active interrogation, i.e. by irradiating objects or goods using external radiation sources, e.g. using gamma rays or cosmic rays
- G01V5/226—Active interrogation, i.e. by irradiating objects or goods using external radiation sources, e.g. using gamma rays or cosmic rays using tomography
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- General Physics & Mathematics (AREA)
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- General Life Sciences & Earth Sciences (AREA)
- High Energy & Nuclear Physics (AREA)
- Health & Medical Sciences (AREA)
- Radiology & Medical Imaging (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- Theoretical Computer Science (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Pulmonology (AREA)
- Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
- Engineering & Computer Science (AREA)
- Analysing Materials By The Use Of Radiation (AREA)
Abstract
The invention discloses a kind of CT detection devices, including probe assembly, ray generator, computer and conveyer belt；Probe assembly and ray generator are symmetricly set on conveyer belt both sides, are respectively used to detected ray signal and send out ray, and computer is connected with probe assembly, the signal for handling and rebuilding probe assembly feedback.The present invention improves the imaging performance of detection system, extends lifetime of system, reduce system cost by the cooperation of probe assembly, ray generator, computer and conveyer belt, compensates for the defect of conventional detectors.
Description
Technical field
The present invention relates to a kind of CT detection devices, belong to luggage and articles safety check CT technical fields.
Background technology
X ray computer double Linear Scan Imaging technology (CT technologies) has been widely used for the peace to luggage or cargo at present
The commonly used use of total inspection, especially double-energy CT system can not only form 3-D view and solve stacked checking matter
Accurately image problem, moreover it is possible to obtain the material information of checking matter, automatic identification simultaneously marks dangerous material.General safety check CT system packet
Include the compositions such as radiographic source, slip ring, computer, control system and detection device.Wherein performance of the detection device to whole CT system
Tremendous influence is suffered from cost.
Ray collimator that the core of conventional dual intensity CT detection systems generally can prevent scattered rays by one and two layers
Probe unit is composed, i.e.,：One collimator is being set at ray to prevent scattered rays, then close to detection system
One low energy detector, the lower ray letter of primary recipient energy are set close to the side of radiographic source in printed circuit board (PCB)
Number；In side of the printed circuit board far from radiographic source, one high energy detector is set, the higher ray signal of primary recipient energy,
Therebetween there is the filter plate that can stop that low energy ray passes through.The pixel quantity of general high low energy probe unit is equal and a pair of
One alignment, sometimes to save cost, high energy probe unit quantity can be less than low energy probe unit.
In this traditional panel detector structure, since ray signal is needed across low energy detector, PCB, filter plate, also
There is the diode section of high energy detector that can just be collected into, therefore there is many problems, for example penetrate process to cause effectively
Signal can be additionally lost in；Diode behavior is caused to decline by high-energy rays irradiation for a long time, reduced service life and multi-layer PCB system
Plate cost is higher.
Invention content
Present invention solves the technical problem that being：Overcome the deficiencies in the prior art, the present invention provides a kind of CT detection devices,
By the cooperation of probe assembly, ray generator, computer and conveyer belt, the imaging performance of detection system is improved, is extended
Lifetime of system reduces system cost, compensates for the defect of conventional detectors.
Technical solution of the invention is：
A kind of CT detection devices, including probe assembly, ray generator, computer and conveyer belt；Probe assembly and ray
Generator is symmetricly set on conveyer belt both sides, is respectively used to detected ray signal and sends out ray, computer and probe assembly phase
Even, the signal for handling and rebuilding probe assembly feedback.
In a kind of above-mentioned CT detection devices, the probe assembly include low energy detector, high energy detector, substrate and
Collimator；Substrate is pcb board, and low energy detector and high energy detector are installed in substrate side and directed ray generator, low
It can be equipped between detector and high energy detector for preventing ray scattering and filtering the collimator of low energy ray.
In a kind of above-mentioned CT detection devices, the low energy detector and high energy detector are by photoelectric device and flicker
Body forms, and the scintillator of low energy detector and high energy detector is all made of flash luminous material.
In a kind of above-mentioned CT detection devices, the difference of the thickness of the high energy detector and the thickness of low energy detector is not
Less than 1mm.
In a kind of above-mentioned CT detection devices, the collimator uses platy structure, collimator side to be equipped with for subtracting
The optical grating construction of few ray scattering, the collimator other side correspond to the position of high energy detector equipped with the filter for filtering low energy signal
Wave plate, collimator is by aluminium alloy, ferroalloy, copper alloy or metal casting and forming.
In a kind of above-mentioned CT detection devices, the output voltage of the ray generator is not less than 120kV, and ray occurs
The output current of device is not less than 1mA.
In a kind of above-mentioned CT detection devices, the conveyer belt uses rubber material, the thickness range of transmission belt to be set as
2mm~20mm.
In a kind of above-mentioned CT detection devices, several high energy detectors are arranged in interval on the substrate, several are high
The spacing range of energy detector is set as 20mm~200mm.
In a kind of above-mentioned CT detection devices, several low energy detectors are arranged in interval on the substrate, several are low
The spacing range of energy detector is set as 5mm~100mm.
In a kind of above-mentioned CT detection devices, the transmission speed of the conveyer belt is no more than 0.6m/s.
Compared with the prior art, the invention has the advantages that：
【1】Low energy detector and high energy detector are installed in substrate side and directed ray generator by the present invention, are had
Effect reduces high energy detector to the distance of radiographic source, not only improves detection efficient but also extends the use longevity of detector
Life, substantially reduces production cost.
【2】The ingenious filter being provided with for filtering low energy signal in position of high energy detector is corresponded in the collimator of the present invention
On the one hand wave plate realizes integration processing casting, reduces the complexity of production, accurate cost control；It is another
Aspect, it is ensured that the reliable separation of high low energy signal provides more optimal application environment for the follow-up resolving of computer.
【3】Compact overall structure of the present invention is suitable for various working environments, and service life is relatively long, in complex working condition
Under still can good operation, have the characteristics that applied widely, have good market application prospect.
Description of the drawings
Attached drawing is used to provide further understanding of the present invention, and is constituted part of this application, the embodiment of the present invention and
It illustrates, for explaining the present invention, not constituting improper limitations of the present invention.In the accompanying drawings：
Fig. 1 is the structure chart of the present invention
Fig. 2 is probe assembly schematic diagram
Fig. 3 is probe assembly structure chart
Fig. 4 is probe assembly schematic diagram
Wherein：1 probe assembly；2 ray generators；3 computers；4 conveyer belts；101 low energy detectors；102 high energy detect
Device；103 substrates；104 collimators；
Specific implementation mode
To make the solution of the present invention more be illustrated, explanation and specific embodiment are made the present invention further below in conjunction with the accompanying drawings
Description：
As shown in Figure 1, a kind of CT detection devices, including probe assembly 1, ray generator 2, computer 3 and conveyer belt 4；
Probe assembly 1 and ray generator 2 are symmetricly set on 4 both sides of conveyer belt, are respectively used to detected ray signal and send out ray, count
Calculation machine 3 is connected with probe assembly 1, the signal for handling and rebuilding the feedback of probe assembly 1.
As shown in figures 2-3, it is preferred that probe assembly 1 includes low energy detector 101, high energy detector 102, substrate 103
With collimator 104；Substrate 103 is pcb board, and low energy detector 101 and high energy detector 102 are installed in 103 side of substrate simultaneously
Directed ray generator 2 is equipped between low energy detector 101 and high energy detector 102 for preventing ray scattering and filtering low
The collimator 104 of energy ray.
Preferably, low energy detector 101 and high energy detector 102 are made of photoelectric device and scintillator, low energy detection
The scintillator of device 101 and high energy detector 102 is all made of flash luminous material, such as CsI, GOS, YAG, LuSO, LaBr.
Preferably, the difference of the thickness of the thickness of high energy detector 102 and low energy detector 101 is not less than 1mm.
Preferably, collimator 104 uses platy structure, 104 side of collimator to be equipped with the grating for reducing ray scattering
Structure, 104 other side of collimator correspond to the position of high energy detector 102 equipped with the filter plate for filtering low energy signal, collimation
Device 104 is by aluminium alloy, ferroalloy, copper alloy or metal casting and forming.
Preferably, the output voltage of ray generator 2 is not less than 120kV, and the output current of ray generator 2 is not less than
1mA。
Preferably, conveyer belt 4 uses rubber material, the thickness range of transmission belt 4 to be set as 2mm~20mm.
Preferably, several high energy detectors 102, the spacing of several high energy detectors 102 is arranged in interval on substrate 103
Range is set as 20mm~200mm.
Preferably, several low energy detectors 101, the spacing of several low energy detectors 101 is arranged in interval on substrate 103
Range is set as 5mm~100mm.
Preferably, the transmission speed of conveyer belt 4 is no more than 0.6m/s.
The present invention operation principle be：
When determinand is sent between probe assembly 1 and ray generator 2 by conveyer belt 4, probe assembly 1 and ray hair
Raw device 2 is carried out at the same time high speed rotation, and the ray that ray generator 2 is sent out sequentially passes through conveyer belt 4, determinand and collimator 104
Afterwards, the high energy detector 102 in probe assembly 1 and low energy detector 101 are respectively received the height with determinand dampening information
Low energy ray signal, then the high low energy ray signal is transmitted separately to computer 3 and carries out resolving processing, you can realize determinand
Three-dimensional imaging can obtain the density of determinand and effective atomic number information and calculate simultaneously because two groups of signals of high low energy
Coloured image is presented in machine 3.
The content not being described in detail in description of the invention is known to the skilled person technology.
Claims (10)
1. a kind of CT detection devices, it is characterised in that：Including probe assembly (1), ray generator (2), computer (3) and transmission
Band (4)；Probe assembly (1) and ray generator (2) are symmetricly set on conveyer belt (4) both sides, are respectively used to detected ray signal
With send out ray, computer (3) is connected with probe assembly (1), for handle and rebuild probe assembly (1) feedback signal.
2. a kind of CT detection devices according to claim 1, it is characterised in that：The probe assembly (1) includes that low energy is visited
Survey device (101), high energy detector (102), substrate (103) and collimator (104)；Substrate (103) is pcb board, low energy detector
(101) and high energy detector (102) is installed in substrate (103) side and directed ray generator (2), low energy detector
(101) it is equipped between high energy detector (102) for preventing ray scattering and filtering the collimator (104) of low energy ray.
3. a kind of CT detection devices according to claim 2, it is characterised in that：The low energy detector (101) and high energy
Detector (102) is made of photoelectric device and scintillator, the scintillator of low energy detector (101) and high energy detector (102)
It is all made of flash luminous material.
4. a kind of CT detection devices according to claim 3, it is characterised in that：The thickness of the high energy detector (102)
And the difference of the thickness of low energy detector (101) is not less than 1mm.
5. a kind of CT detection devices according to claim 2, it is characterised in that：The collimator (104) uses plate knot
Structure, collimator (104) side are equipped with the optical grating construction for reducing ray scattering, and collimator (104) other side corresponds to high energy spy
The position of device (102) is surveyed equipped with the filter plate for filtering low energy signal, collimator (104) is by aluminium alloy, ferroalloy, copper alloy
Or metal casting and forming.
6. a kind of CT detection devices according to claim 1, it is characterised in that：The output electricity of the ray generator (2)
Pressure is not less than 120kV, and the output current of ray generator (2) is not less than 1mA.
7. a kind of CT detection devices according to claim 1, it is characterised in that：The conveyer belt (4) uses rubber material,
The thickness range of transmission belt (4) is set as 2mm~20mm.
8. a kind of CT detection devices according to claim 1, it is characterised in that：The substrate (103) if on be spaced setting
Dry high energy detector (102), the spacing range of several high energy detectors (102) are set as 20mm~200mm.
9. a kind of CT detection devices according to claim 1, it is characterised in that：The substrate (103) if on be spaced setting
Dry low energy detector (101), the spacing range of several low energy detectors (101) are set as 5mm~100mm.
10. a kind of CT detection devices according to claim 1, it is characterised in that：The transmission speed of the conveyer belt (4) is not
More than 0.6m/s.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711319391.3A CN108387593A (en) | 2017-12-12 | 2017-12-12 | A kind of CT detection devices |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711319391.3A CN108387593A (en) | 2017-12-12 | 2017-12-12 | A kind of CT detection devices |
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| Publication Number | Publication Date |
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| CN108387593A true CN108387593A (en) | 2018-08-10 |
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| CN201711319391.3A Pending CN108387593A (en) | 2017-12-12 | 2017-12-12 | A kind of CT detection devices |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109632844A (en) * | 2019-01-09 | 2019-04-16 | 中国人民解放军战略支援部队信息工程大学 | Dual intensity CT imaging system and method based on linear scanning track |
| CN109946747A (en) * | 2019-03-25 | 2019-06-28 | 北京航星机器制造有限公司 | A kind of dual intensity CT detection system based on novel detection device |
| CN113740357A (en) * | 2021-08-25 | 2021-12-03 | 江苏尚飞光电科技股份有限公司 | Novel X-ray dual-energy detector and imaging method and imaging system thereof |
| CN117518282A (en) * | 2023-11-09 | 2024-02-06 | 上海物影科技有限公司 | Miniaturized security inspection CT system |
| CN117518282B (en) * | 2023-11-09 | 2024-06-07 | 上海物影科技有限公司 | Miniaturized security inspection CT system |
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| CN103604819A (en) * | 2013-11-25 | 2014-02-26 | 东北大学 | Device and method for carrying out substance identification by double-energy transmission and low-energy scattering |
| CN104749199A (en) * | 2013-12-30 | 2015-07-01 | 同方威视技术股份有限公司 | Dual-energy/double-vision high-energy X-ray perspective imaging system |
| CN106483153A (en) * | 2016-12-23 | 2017-03-08 | 同方威视技术股份有限公司 | Dual-energy detector and radiation checking system |
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2017
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| CN101937095A (en) * | 2009-06-30 | 2011-01-05 | 同方威视技术股份有限公司 | Dual energy X ray detector and dual energy X ray detector array device |
| CN201852943U (en) * | 2010-08-16 | 2011-06-01 | 北京艾瑞奇电子有限公司 | Combined X-ray low-high energy linear array detector |
| CN103604819A (en) * | 2013-11-25 | 2014-02-26 | 东北大学 | Device and method for carrying out substance identification by double-energy transmission and low-energy scattering |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109632844A (en) * | 2019-01-09 | 2019-04-16 | 中国人民解放军战略支援部队信息工程大学 | Dual intensity CT imaging system and method based on linear scanning track |
| CN109632844B (en) * | 2019-01-09 | 2021-08-17 | 中国人民解放军战略支援部队信息工程大学 | Dual-energy CT imaging system and method based on linear scanning track |
| CN109946747A (en) * | 2019-03-25 | 2019-06-28 | 北京航星机器制造有限公司 | A kind of dual intensity CT detection system based on novel detection device |
| CN113740357A (en) * | 2021-08-25 | 2021-12-03 | 江苏尚飞光电科技股份有限公司 | Novel X-ray dual-energy detector and imaging method and imaging system thereof |
| CN117518282A (en) * | 2023-11-09 | 2024-02-06 | 上海物影科技有限公司 | Miniaturized security inspection CT system |
| CN117518282B (en) * | 2023-11-09 | 2024-06-07 | 上海物影科技有限公司 | Miniaturized security inspection CT system |
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