CN106896118B - System, method and the data information label of radiation scanning are carried out to mobile target - Google Patents
System, method and the data information label of radiation scanning are carried out to mobile target Download PDFInfo
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- 238000000034 method Methods 0.000 title claims abstract description 18
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- 238000003384 imaging method Methods 0.000 claims description 10
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- 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
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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
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
- G06K19/00—Record carriers for use with machines and with at least a part designed to carry digital markings
- G06K19/06—Record carriers for use with machines and with at least a part designed to carry digital markings characterised by the kind of the digital marking, e.g. shape, nature, code
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
- G06K19/00—Record carriers for use with machines and with at least a part designed to carry digital markings
- G06K19/06—Record carriers for use with machines and with at least a part designed to carry digital markings characterised by the kind of the digital marking, e.g. shape, nature, code
- G06K19/06009—Record carriers for use with machines and with at least a part designed to carry digital markings characterised by the kind of the digital marking, e.g. shape, nature, code with optically detectable marking
- G06K19/06037—Record carriers for use with machines and with at least a part designed to carry digital markings characterised by the kind of the digital marking, e.g. shape, nature, code with optically detectable marking multi-dimensional coding
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
- G06K19/00—Record carriers for use with machines and with at least a part designed to carry digital markings
- G06K19/06—Record carriers for use with machines and with at least a part designed to carry digital markings characterised by the kind of the digital marking, e.g. shape, nature, code
- G06K19/06009—Record carriers for use with machines and with at least a part designed to carry digital markings characterised by the kind of the digital marking, e.g. shape, nature, code with optically detectable marking
- G06K19/06046—Constructional details
- G06K19/06131—Constructional details the marking comprising a target pattern, e.g. for indicating the center of the bar code or for helping a bar code reader to properly orient the scanner or to retrieve the bar code inside of an image
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
- G06K19/00—Record carriers for use with machines and with at least a part designed to carry digital markings
- G06K19/06—Record carriers for use with machines and with at least a part designed to carry digital markings characterised by the kind of the digital marking, e.g. shape, nature, code
- G06K19/067—Record carriers with conductive marks, printed circuits or semiconductor circuit elements, e.g. credit or identity cards also with resonating or responding marks without active components
- G06K19/07—Record carriers with conductive marks, printed circuits or semiconductor circuit elements, e.g. credit or identity cards also with resonating or responding marks without active components with integrated circuit chips
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Abstract
The invention discloses a kind of systems for carrying out radiation scanning to mobile target, comprising: radiation source, for issuing ray；Label reader for reading information entrained by the data information label being mounted in mobile target, and is sent to control module；Detection module issues signal to control module for detecting mobile target the location of in sense channel, and when mobile target reaches predetermined position；Control module, for based on the information from the label reader and the signal from the detection module, the process for issuing ray to radiation source to be controlled；It wherein, include length information in information entrained by data information label, the length information is indicated to need to radiate the length in the region of evacuation in mobile target or be needed with the length in the region of low dose rate ray scanning.It can be achieved to be scanned inspection to different types of mobile target in the way of a variety of scanographies by the present invention.
Description
The present application is a divisional application of the following applications: the application date is 2014, 7 and 22, the application number is 201410349185.7, and the invention is named as a system, a method and a data information label for carrying out radiation scanning on a moving target.
Technical Field
The invention relates to the technical field of radiation imaging, in particular to a device and a method for performing radiation imaging on a moving target.
Background
Scanning and inspecting moving objects such as vehicles and goods by using rays is a common means for border inspection and customs inspection at present. With the ever increasing anti-terrorist situation and the need to combat smuggling, there is a need for full inspection of vehicles passing by frontiers and vehicles passing customs. This requires that the inspection system be capable of automatic, rapid scanning of moving objects. For vehicles, a driver is required to drive the vehicle to quickly pass through an inspection system without stopping the vehicle, so that the inspection speed is increased.
In response to the requirement, some security inspection devices are available for scanning and inspecting vehicles, and one of the most important problems in the scanning and inspecting process is that the system must avoid the area where the passengers are located in the vehicles to prevent radiation damage. In general, a pre-installed sensor is used to detect the driving state of the vehicle, and after the passenger compartment where the passenger is located is driven, the radiation scanning is started for the cargo compartment of the vehicle.
However, since the sensor cannot distinguish the passenger compartment and the cargo compartment of the vehicle and cannot identify the length of the passenger compartment of different vehicles, most of the vehicle security inspection devices adopt a safety-biased design mode, that is, the system is designed to always avoid all the vehicles to be inspected by a fixed length which is larger than the length of the passenger compartment of all types of vehicles on the market, so that the safety avoidance of personnel in all types of vehicles to be inspected is ensured. Under the design concept, when the length of the passenger compartment of the detected vehicle is very small and the length of the cargo compartment is very large, the condition of missed detection is very serious, and potential safety hazards exist.
Disclosure of Invention
In view of this, the present invention provides an apparatus and a method for radiation imaging of a moving target, which use a non-contact sensor to obtain characteristic information of the moving target, thereby eliminating potential safety hazards.
The invention provides a system for radiation scanning of a moving target, comprising: a radiation source for emitting radiation; the information reader is used for reading the characteristic information of the moving target and sending the characteristic information to the control module; the detection module is used for detecting the position of the moving target in the detection channel and sending a signal to the control module when the moving target reaches a preset position; the control module is used for controlling the process of emitting rays by the radiation source based on the characteristic information of the moving target from the information reader and the signal from the detection module; the radiation detector is used for receiving the rays passing through the radiation scanning area and converting the rays into digital signals; a radiation imaging device for generating a radiation image from the digital signal of the radiation detector; the information reader is connected with the database module, length information corresponding to the characteristic information of the moving target is stored in the database module, and the length information indicates the length of an area needing radiation avoidance in the moving target or the length of an area needing low-dosage-rate ray scanning.
The invention also provides a method for carrying out radiation scanning on the moving target, which comprises the following steps: before a moving target enters a radiation scanning area, acquiring the length of a first part in the moving target and a radiation scanning mode required by the moving target through a data information tag carried on the moving target, wherein the first part refers to a part which needs radiation avoidance in the moving target or a part which needs to be scanned by low-dose-rate rays; after the moving target enters a radiation scanning area, controlling a radiation source to perform radiation scanning on the moving target according to a radiation scanning mode according to the position of the moving target; after moving the target away from the radiation scanning area, the radiation source is controlled to stop the radiation scanning.
The invention also provides a data information tag, wherein the data information tag is stored with length information and radiation scanning mode information, the length information indicates the length of the first part in the target object, and the radiation scanning mode information selectively indicates one of the following scanning modes, ① is used for scanning the first part of the target object without scanning and scanning the second part of the target object, ② is used for scanning the first part of the target object with low-dosage-rate rays and scanning the second part of the target object with high-dosage-rate rays, ③ is used for scanning the whole target object with low-dosage-rate rays, ④ is used for scanning the whole target object with high-dosage-rate rays, and ⑤ is used for not scanning the whole target object.
The invention provides a system for radiation scanning of a moving target, comprising: a radiation source for emitting radiation; the tag reader is used for reading information carried by a data information tag carried on a moving target and sending the information to the control module; the detection module is used for detecting the position of the moving target in the detection channel and sending a signal to the control module when the moving target reaches a preset position; the control module is used for controlling the process of emitting rays by the radiation source based on the information from the tag reader and the signal from the detection module; the radiation detector is used for receiving the rays passing through the radiation scanning area and converting the rays into digital signals; a radiation imaging device for generating a radiation image from the digital signal of the radiation detector; the information carried by the data information label comprises length information, and the length information indicates the length of a region needing radiation avoidance in the moving target or the length of a region needing low-dose-rate ray scanning.
The information carried by the data information tag preferably further includes radiation scanning mode information, where the radiation scanning mode information selectively indicates one of ① scanning a first part of the moving target and a second part of the moving target, ② scanning the first part of the moving target with low dose rate radiation and a second part of the moving target with high dose rate radiation, ③ scanning the moving target with low dose rate radiation, ④ scanning the moving target with high dose rate radiation, and ⑤ scanning the moving target with no radiation, where the first part of the moving target refers to a region of the moving target that needs radiation avoidance or a region that needs low dose rate radiation scanning, and the second part of the moving target refers to a region of the moving target that does not need radiation avoidance or a region that does not need low dose rate radiation scanning.
Preferably, the data information tag selectively adopts at least one of the following various tags: radio frequency identification RFID tags, two-dimensional graphic codes and bar codes.
Preferably, when the data information tag is an RFID tag, the system further comprises a triggering module for activating the tag reader upon detection of the arrival of a moving object.
Preferably, the detection module is a visual sensor.
Preferably, the detection module comprises a first detection submodule and a second detection submodule, wherein the first detection submodule is located on the upstream side of the radiation scanning area and is used for sending a signal to the control module when the moving target is about to enter the radiation scanning area; the second detection submodule is positioned at the downstream side of the radiation scanning area and used for sending a signal to the control module when the moving target travels a preset distance; the first/second detection sub-module selectively employs at least one of the following various sensors: photoelectric switch, light curtain, ground induction coil, pressure sensor.
Preferably, the radiation source selectively employs at least one of the following various radiation sources: an electron linear accelerator, an electron induction accelerator Betatron, a runway electron cyclotron RTM, a neutron generator, a Co-60 radioactive source, a Cs-137 radioactive source and an X-ray tube.
The invention has the beneficial effects that:
1. the invention can accurately identify the scanning inspection mode of the moving target, and can accurately identify the length of the moving target needing shielding or the length of low-dosage-rate ray scanning inspection.
2. The invention can realize complete high-dose scanning inspection on the goods of the cargo vehicle.
3. For applications that allow scanning of occupants in low dose scanning, the present invention can achieve 100% full rapid scanning inspection of moving targets.
4. The invention has a plurality of scanning inspection modes, can scan and inspect different types of moving targets, and has wider application range of the automatic inspection system.
Drawings
Fig. 1 is a block diagram of the system architecture for radiation scanning of a moving object in accordance with the present invention.
Fig. 2 is a schematic diagram of a system usage state according to an embodiment of the present invention.
Fig. 3 is a schematic diagram of a system using state according to another embodiment of the present invention.
Fig. 4 is a schematic diagram of a state that the head of the vehicle passes through the radiation scanning area in the embodiment of fig. 3.
Fig. 5 is a block diagram of the control logic for the radiation source of the radiation scanning system of the present invention.
Fig. 6 is a data storage format of a data information tag in an embodiment of the present invention.
Detailed Description
The technical solution of the present invention is described in detail below with reference to the accompanying drawings and specific embodiments.
Fig. 1 shows a block diagram of a system for radiation scanning of a moving object according to the present invention, which includes:
a radiation source emitting radiation;
a tag reader for reading information carried by a data information tag mounted on a moving object and transmitting the information to the control module; the data information label is stored with length information, and the length information indicates the length of an area needing radiation avoidance in the moving target;
the detection module detects the position of the moving target in the detection channel and sends a signal to the control module when the moving target reaches a preset position;
a control module for controlling the process of emitting rays by the radiation source based on the information from the tag reader and the signal from the detection module;
a radiation detector that receives rays passing through a radiation scanning area and converts the rays into digital signals;
and a radiation imaging device which generates a radiation image from the digital signal of the radiation detector.
In practical application scenarios, the moving target can be various objects requiring radiation scanning inspection, such as various types of running trucks, large buses, small cars and the like, or various objects placed on a moving platform, and the system of the invention can be used for radiation scanning inspection.
In the embodiment of the present invention, the radiation source may be an accelerator radiation source, such as an electron linear accelerator (Betatron), a Betatron (Betatron), a race track electron cyclotron (RTM), a neutron generator, etc.; radioactive sources such as Co-60, Cs-137, etc. may also be used; an X-ray tube may also be employed.
In the embodiment of the present invention, the data information tag may adopt a Radio Frequency Identification (RFID) tag, a barcode, a two-dimensional code, or the like. Accordingly, the tag reader should employ an RFID tag reading device, a reading device of a barcode or a two-dimensional code, or the like. When the RFID tag is used, a trigger module can be additionally arranged for the radiation scanning system and used for activating the RFID tag reading equipment when the arrival of the moving object is detected.
In an embodiment of the present invention, the detection module may employ a vision sensor, and referring to fig. 2, a state diagram of the use of the radiation scanning system when employing a vision sensor is shown. The moving object is a truck, which enters from the left side of the detection channel 110 and travels without interruption. Under the monitoring of the visual sensor 108, a truck first arrives at the position of the trigger module 101 (a photoelectric switch, a low-frequency trigger coil of an RFID tag, etc. can be used), the trigger module 101 is triggered to send a signal to the tag reader 102 to activate the tag reader 102, the tag reader 102 starts to read a data information tag carried on the truck to obtain length information, and assuming that the length is L (the length of a truck head is L, since a driver is at the truck head, radiation avoidance of the truck head should be implemented), the tag reader 102 sends the length information to the control module 106. Under the monitoring of the visual sensor 108, when the distance between the head of the truck and the radiation scanning area 103 is greater than or equal to L, the visual sensor 108 sends a signal to the control module 106, the control module 106 controls the radiation source 104 to start emitting rays according to the received signal, the cargo box of the truck is subjected to radiation scanning, and the radiation detector 105 and the radiation imaging device are subjected to receiving and imaging processing of the scanning rays.
The accurate radiation avoidance of the truck head is realized through the above processing. Because the length information of the headstock is obtained in advance, the system can not emit rays when the headstock enters a scanning area, and once the headstock leaves the scanning area, the radiation source immediately emits beams to scan the rest parts, so that the missing inspection of goods can be avoided to the maximum extent on the premise of ensuring the safety of personnel.
In the embodiment of fig. 2, a sensor 107 (e.g. a ground coil or a pressure sensor) may also be provided at the position of the scanning area 103, and the role is to perform the radiation scanning process only when the sensor 107 is triggered; if the sensor 107 is not triggered, indicating that no vehicle is driving in, then the radiation scanning procedure is not performed. The system can be prevented from being triggered by personnel who accidentally enter to start radiation scanning, so that accidental injury is caused to the personnel.
In an embodiment of the present invention, the detection module may also employ a series of sensor assemblies, see fig. 3, wherein, in order to detect whether a vehicle is about to enter the scanning area 103, a sensor assembly 109 is disposed on the upstream side (left side in fig. 3) of the radiation source 104, and the sensor assembly 109 is in close proximity to the boundary of the scanning area 103; meanwhile, in order to detect the real-time position of the vehicle after entering the scanning area, the sensor assemblies 108 are arranged at the downstream side of the radiation source 104, and the sensor assemblies 108 are sequentially arranged along one side of the detection channel 110, and a certain distance can be reserved between two adjacent sensor assemblies when necessary. The sensor assemblies 108 and 109 may be implemented with any of the presently available types of sensors, such as photoelectric switches, light curtains, ground coils, pressure sensors, etc., or any combination thereof.
During a radiation scan, the embodiment of FIG. 3 differs from the embodiment of FIG. 2 in that when the sensor assembly 109 is triggered, it sends a signal to the control module 106 indicating that a vehicle head is about to enter the radiation scanning area 103; as the truck continues to travel, the sensor assemblies 108 will be triggered in turn, and since the sensor assemblies 108 are arranged in a manner that they are sequentially arranged along the aisle 110 and the positions and distances are known in advance so that they can record the displacement of the target object within the aisle 110, the control module 106 controls the radiation source 104 to start to emit a beam to scan the cargo box of the truck when the truck is displaced so that the truck leaves the scanning area 103, that is, the cargo box is about to enter the scanning area 103, according to the length L of the truck head previously obtained by the tag reader 102.
Fig. 4 shows a state diagram of the embodiment of fig. 3 in which the vehicle head passes through the scanning area 103, and fig. 4 omits the components such as the tag reader 102. When the sensor assembly 108 detects that the locomotive reaches the L position, the radiation source 104 emits a beam, so as to avoid missing detection of the cargo to the maximum extent on the premise of ensuring the safety of personnel.
On the other hand, according to the regulations of the relevant radiation safety standards, in addition to performing radiation avoidance on specific areas, such as the truck heads in fig. 2 and 3, instead of scanning, the areas may be subjected to radiation scanning with low dose rate rays, and parts not requiring radiation avoidance may be scanned with high dose rate rays, so that a hundred percent safety inspection on a target object may be realized within a radiation dose safety range.
In a practical application scenario, the moving object can be viewed as two parts, the first part is an area that needs to be scanned by low dose rate radiation, usually a region where a person is located, and the second part is an area that does not need to be scanned by low dose rate radiation, such as a region where goods are located.
Based on this, a suitable radiation scanning pattern is set for the moving object, and still taking the truck in fig. 2 as an example, the truck portion having a length L is a first portion, and the cargo box portion is a second portion, the scanning pattern can be set as: the first portion is scanned with low dose rate radiation and the second portion is scanned with high dose rate radiation. When a vehicle is scanned and inspected, the control module 106 is notified when the vision sensor 108 detects that a first part of the truck is about to enter the scanning area 103, the control module 106 enables the radiation source 104 to start to emit low-dose-rate rays (lower than the limit specified by radiation safety standards), the control module 106 is notified when the vision sensor 108 detects that the distance from the first part to the scanning area 103 is greater than or equal to L, and the control module 106 enables the radiation source 104 to convert the distance into high-dose-rate rays and scan a second part. In the present embodiment, the radiation source 104 is preferably an Betatron or a race track microtron RTM, which can rapidly realize the conversion of rays with different dose rates. According to the processing, the method meets the relevant radiation safety standard, realizes the whole-vehicle scanning of the vehicle, and greatly improves the security check reliability.
For the embodiment of fig. 3, the above-described scan mode may also be performed, and in particular, when the sensor assembly 109 is triggered, the control module 106 is notified that the first portion is about to enter the radiation scanning region 103, and the control module 106 causes the radiation source 104 to emit low dose rate radiation; as the truck continues to travel, the sensor assembly 108 is sequentially triggered, and according to the length L of the first portion obtained by the tag reader 102, when the distance from the first portion of the truck to the scanning area 103 is greater than or equal to L, the sensor assembly 108 notifies the control module 106 to convert the radiation source 104 into high dose rate radiation, and scans the second portion of the truck.
In an embodiment of the present invention, when the whole moving target is used as a passenger compartment, such as a car or a bus, the whole vehicle needs to be subjected to radiation avoidance or low dose rate scanning, and then the scanning mode should be set as follows: the whole moving target is not scanned, or the whole moving target is scanned by low-dosage-rate rays, so that the safety of personnel in the scanning process can be ensured.
In one embodiment of the invention, the moving target is the goods to be detected on the moving platform, so that no avoidance or ray dosage rate adjustment is needed, and the whole goods to be detected is scanned by high dosage rate rays.
For the above setting of the radiation scanning mode for different types of moving objects, the present invention stores the scanning mode information M in the data information tag, together with the length information L stored in the tag, as the basis for controlling the radiation source in the radiation scanning system.
Fig. 5 shows a logic block diagram of a control logic of a radiation source of the radiation scanning system of the present invention, when a moving target enters a detection channel, a tag reader will read scanning mode information M and length information L carried in a tag of the moving target, and control a beam-out timing of the radiation source and a dose rate of beam-out rays according to a scanning mode, so as to scan a first partial area where a person in the moving target is located and a second partial area where the person in the moving target is not contained; or the first partial area is scanned by low-dosage-rate rays, and the second partial area is scanned by high-dosage-rate rays; or scanning the whole moving target by low-dose-rate rays; or scanning the whole moving target by high-dose-rate rays; or not to scan the moving object with rays.
And when the moving target completely passes through the scanning area, controlling the radiation source to stop emitting rays, and finishing the radiation scanning inspection. The complete passing through the scanning area means that the tail of the moving object has left the boundary on the downstream side of the scanning area, and may also mean that the tail of the moving object has left the boundary on the downstream side of the scanning area and continues to advance by a certain distance, preferably less than 3 m.
Fig. 6 shows a data storage format of a data information tag according to an embodiment of the present invention, which is a definition of a radiation scanning pattern and a data structure of lengths of parts, where a first byte of the definition is a data area and a subsequent part is a checksum. The data area length is 8, the highest bit U indicates whether the first part of the object is not scanned, the last 7 indicates the length of the first part in the moving object, and the unit is 0.05m, i.e. 1 indicates that the length of the first part of the moving object is 0.05m, wherein 127 indicates that the length of the first part is equal to the total length of the moving object (as shown in table 1 below). The subsequent n bits are checksum, which may be parity of 1 bit, or cyclic redundancy check CRC check of 8 bits or other bits. The checksum has the function of verifying the integrity of the data and preventing the data from being read and written wrongly. A checksum is not necessary. Table 1 shows a specific form of the above scanning mode and length data structure:
TABLE 1
Depending on the type of moving object and the length of the first portion of the moving object, the length information and information of the appropriate scanning pattern is stored in an RFID tag (or two-dimensional graphic code, bar code) that is placed inside the moving object or affixed to the outside of the moving object for use with the radiation scanning system. The RFID tags used may be passive, active or semi-active. Preferably a metal resistant RFID tag is used.
In addition, as for the vehicle, the vehicle has a unique license plate number or vehicle identification code VIN and reflects the characteristic information (the vehicle type and the length information of each part of the vehicle) of the vehicle, therefore, the invention can also replace a label reader of the radiation scanning system with an information reader, the reader reads the license plate number or the VIN code of the vehicle and is connected with a database module for the information reader, and the scanning mode information M and the length information L corresponding to the license plate number or the VIN code are stored in the database. The information is fed back to the system control module 106, the processing flow given in the above scheme is executed, and the radiation scanning inspection can be completed by adopting a proper scanning mode for vehicles of different vehicle types. In other embodiments, the tag reader may be reserved, and an information reader is added to the system, so that the information reader can read the license plate number or VIN code of the vehicle when the tag reader fails to acquire the data.
In the above embodiment of the present invention, when the length of the first part of the moving target is L, the length of the system performing radiation avoidance (or low dose rate scanning) is greater than or equal to L, where the length is set to be equal to L, which means that the first part is accurately avoided, and the control precision is high; the length is set to be larger than L, which means that the avoiding length is increased, and the device is a safer device and can prevent accidental radiation to personnel.
With respect to the first part and the second part of the moving object defined in the present invention, for convenience of description, the first part and the second part given in the embodiments are each continuous, and in other embodiments, the first part may be discontinuous. For example: the cab of a large vehicle is provided with a driver, the middle part of the vehicle is provided with a cargo box, the tail of the vehicle is provided with a passenger seat, the first part of the moving target comprises the cab of the head of the vehicle and the passenger seat area of the tail of the vehicle, and the second part is provided with the cargo box in the middle. In contrast, at least the length L1 of the cab and the length L2 of the cargo box can be stored in the tag, and the scanning mode can be set accordingly, so that only the cargo box is scanned without scanning the front cab and rear passenger seat areas; or the areas of the cab and the seats of the passengers at the head of the vehicle are scanned at low dose rate, and the areas of the seats of the passengers at the tail of the vehicle are scanned at high dose rate.
The technical solutions of the present invention have been described in detail with reference to specific embodiments, which are used to help understand the ideas of the present invention. The derivation and modification made by the person skilled in the art on the basis of the specific embodiment of the present invention also belong to the protection scope of the present invention.
Claims (9)
1. A system for radiation scanning of a moving target, comprising:
a radiation source for emitting radiation;
the information reader is used for reading the characteristic information of the moving target and sending the characteristic information to the control module;
the detection module is used for detecting the position of the moving target in the detection channel and sending a signal to the control module when the moving target reaches a preset position;
the control module is used for controlling the process of emitting rays by the radiation source based on the moving target characteristic information from the information reader and the signal from the detection module;
the radiation detector is used for receiving the rays passing through the radiation scanning area and converting the rays into digital signals;
a radiation imaging device for generating a radiation image from the digital signal of the radiation detector; wherein,
the information reader is connected with the database module, the database module stores length information corresponding to the characteristic information of the moving target, and the length information indicates the length of an area needing radiation avoidance in the moving target or the length of an area needing low-dosage-rate ray scanning.
2. The system for radiation scanning of a moving object as recited in claim 1, wherein said moving object is a vehicle and said characterizing information is a vehicle identification number VIN.
3. A method of radiation scanning a moving target, comprising:
before a moving target enters a radiation scanning area, acquiring the length of a first part in the moving target and a radiation scanning mode required by the moving target through a data information label carried on the moving target, wherein the first part refers to a part which needs radiation avoidance in the moving target or a part which needs to be scanned by low-dose-rate rays;
after the moving target enters a radiation scanning area, controlling a radiation source to perform radiation scanning on the moving target according to a radiation scanning mode according to the position of the moving target;
after moving the target away from the radiation scanning area, the radiation source is controlled to stop the radiation scanning.
4. A system for radiation scanning of a moving target, comprising:
a radiation source for emitting radiation;
the tag reader is used for reading information carried by a data information tag carried on a moving target and sending the information to the control module;
the detection module is used for detecting the position of the moving target in the detection channel and sending a signal to the control module when the moving target reaches a preset position;
the control module is used for controlling the process of emitting rays by the radiation source based on the information from the tag reader and the signal from the detection module;
the radiation detector is used for receiving the rays passing through the radiation scanning area and converting the rays into digital signals;
a radiation imaging device for generating a radiation image from the digital signal of the radiation detector; wherein,
the information carried by the data information label comprises length information, and the length information indicates the length of an area needing radiation avoidance in the moving target or the length of an area needing low dose rate ray scanning.
5. The system for radiation scanning of a moving object as claimed in claim 4, wherein said data information tag selectively employs at least one of the following: radio frequency identification RFID tags, two-dimensional graphic codes and bar codes.
6. The system for radiation scanning of a moving object as recited in claim 5, wherein when said data information tag is an RFID tag, said system further comprises a triggering module for activating said tag reader upon detection of the arrival of a moving object.
7. The system for radiation scanning of a moving object of claim 4, wherein said detection module is a vision sensor.
8. The system for radiation scanning of a moving object of claim 4, wherein said detection module comprises a first detection sub-module and a second detection sub-module, wherein,
the first detection submodule is positioned on the upstream side of the radiation scanning area and used for sending a signal to the control module when the moving target is about to enter the radiation scanning area;
the second detection submodule is positioned at the downstream side of the radiation scanning area and used for sending a signal to the control module when the moving target travels a preset distance;
the first detection submodule and/or the second detection submodule selectively employ at least one of the following various sensors: photoelectric switch, light curtain, ground induction coil, pressure sensor.
9. The system for radiation scanning of a moving object of claim 4, wherein said radiation source selectively employs at least one of the following: an electron linear accelerator, an electron induction accelerator Betatron, a runway electron cyclotron RTM, a neutron generator, a Co-60 radioactive source, a Cs-137 radioactive source and an X-ray tube.
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| WO2016011804A1 (en) | 2016-01-28 |
| CN106896118A (en) | 2017-06-27 |
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