CN115616008B - Arm support, mobile radiation detection equipment, acceptance system and security inspection method - Google Patents
Arm support, mobile radiation detection equipment, acceptance system and security inspection method Download PDFInfo
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- CN115616008B CN115616008B CN202111074033.7A CN202111074033A CN115616008B CN 115616008 B CN115616008 B CN 115616008B CN 202111074033 A CN202111074033 A CN 202111074033A CN 115616008 B CN115616008 B CN 115616008B
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- 238000001514 detection method Methods 0.000 title claims abstract description 279
- 230000005855 radiation Effects 0.000 title claims abstract description 156
- 238000000034 method Methods 0.000 title claims abstract description 57
- 238000007689 inspection Methods 0.000 title claims abstract description 34
- 238000006073 displacement reaction Methods 0.000 claims abstract description 290
- 230000007246 mechanism Effects 0.000 claims abstract description 74
- 230000008859 change Effects 0.000 claims abstract description 17
- 238000012937 correction Methods 0.000 claims description 103
- 230000008569 process Effects 0.000 claims description 25
- 230000001360 synchronised effect Effects 0.000 claims description 5
- 230000001960 triggered effect Effects 0.000 claims description 3
- 238000009434 installation Methods 0.000 abstract description 7
- 238000010586 diagram Methods 0.000 description 14
- 239000000523 sample Substances 0.000 description 14
- 238000003384 imaging method Methods 0.000 description 10
- 238000004590 computer program Methods 0.000 description 5
- 230000006870 function Effects 0.000 description 4
- 238000012545 processing Methods 0.000 description 4
- 230000009286 beneficial effect Effects 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 2
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- 230000004044 response Effects 0.000 description 2
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- 230000036632 reaction speed Effects 0.000 description 1
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Classifications
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- G01V5/22—
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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
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
- B62D—MOTOR VEHICLES; TRAILERS
- B62D63/00—Motor vehicles or trailers not otherwise provided for
- B62D63/02—Motor vehicles
- B62D63/04—Component parts or accessories
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16M—FRAMES, CASINGS OR BEDS OF ENGINES, MACHINES OR APPARATUS, NOT SPECIFIC TO ENGINES, MACHINES OR APPARATUS PROVIDED FOR ELSEWHERE; STANDS; SUPPORTS
- F16M11/00—Stands or trestles as supports for apparatus or articles placed thereon Stands for scientific apparatus such as gravitational force meters
- F16M11/02—Heads
- F16M11/04—Means for attachment of apparatus; Means allowing adjustment of the apparatus relatively to the stand
- F16M11/043—Allowing translations
- F16M11/045—Allowing translations adapted to left-right translation movement
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16M—FRAMES, CASINGS OR BEDS OF ENGINES, MACHINES OR APPARATUS, NOT SPECIFIC TO ENGINES, MACHINES OR APPARATUS PROVIDED FOR ELSEWHERE; STANDS; SUPPORTS
- F16M11/00—Stands or trestles as supports for apparatus or articles placed thereon Stands for scientific apparatus such as gravitational force meters
- F16M11/02—Heads
- F16M11/04—Means for attachment of apparatus; Means allowing adjustment of the apparatus relatively to the stand
- F16M11/043—Allowing translations
- F16M11/046—Allowing translations adapted to upward-downward translation movement
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16M—FRAMES, CASINGS OR BEDS OF ENGINES, MACHINES OR APPARATUS, NOT SPECIFIC TO ENGINES, MACHINES OR APPARATUS PROVIDED FOR ELSEWHERE; STANDS; SUPPORTS
- F16M11/00—Stands or trestles as supports for apparatus or articles placed thereon Stands for scientific apparatus such as gravitational force meters
- F16M11/02—Heads
- F16M11/04—Means for attachment of apparatus; Means allowing adjustment of the apparatus relatively to the stand
- F16M11/06—Means for attachment of apparatus; Means allowing adjustment of the apparatus relatively to the stand allowing pivoting
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16M—FRAMES, CASINGS OR BEDS OF ENGINES, MACHINES OR APPARATUS, NOT SPECIFIC TO ENGINES, MACHINES OR APPARATUS PROVIDED FOR ELSEWHERE; STANDS; SUPPORTS
- F16M11/00—Stands or trestles as supports for apparatus or articles placed thereon Stands for scientific apparatus such as gravitational force meters
- F16M11/02—Heads
- F16M11/18—Heads with mechanism for moving the apparatus relatively to the stand
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B11/00—Measuring arrangements characterised by the use of optical techniques
- G01B11/02—Measuring arrangements characterised by the use of optical techniques for measuring length, width or thickness
Abstract
The disclosure provides an arm support, mobile radiation detection equipment, an acceptance inspection system and a security inspection method, and relates to the technical field of security inspection. An arm support of the present disclosure includes: a top arm; a trailing arm; and a lateral detection displacement detection device including: the position calibration mechanism is positioned in the area of the first end along the extending direction of the top arm, and is fixed on the side surface of the top arm, the longitudinal arm or the detection vehicle connected with the top arm, and faces the displacement detector; the displacement detector is positioned in the area of the second end along the extending direction of the top arm, is fixed on the side surface of the top arm, the longitudinal arm or a vehicle connected with the top arm, is consistent with the installation height of the position calibration mechanism, faces the position calibration mechanism and is configured to acquire the position change condition of the position calibration mechanism relative to the displacement detector, generate displacement data and output the displacement data; the displacement calibration mechanism and the displacement detector are not fixed on the top arm at the same time. The cantilever crane can improve the detection accuracy of the mobile radiation detection equipment adopting the cantilever crane.
Description
The application is a divisional application of the original application with the application number of 202110787122.X (the application date is 2021, 7 and 13 days, and the application name is that of a cantilever crane, a movable radiation detection device, an acceptance system and a security inspection method).
Technical Field
The disclosure relates to the technical field of security inspection, in particular to an arm support, mobile radiation detection equipment, an acceptance system and a security inspection method.
Background
In the field of radiation imaging, it is required that the beam plane be coplanar with the array detector plane, which can lead to poor image quality if the coplanarity changes during imaging. Therefore, it is necessary to detect the change of coplanarity in real time, process the data, correct the image, and improve the image quality.
For mobile inspection devices, such as vehicle-mounted and combined mobile, in the case of active scanning, there is a certain requirement for flatness of the ground or rail and stability of control of the movement of the device in order to reduce vibration of the device during movement. However, in the actual travelling process of the equipment, a certain degree of vibration always occurs, and particularly for a ground travelling self-adaptive scanning device (intelligent rail system) which has recently emerged in recent years, an imaging system of the device faces a more complex and changeable environment, and the vibration of the equipment is more severe. As shown in fig. 1, the vibration causes a relative displacement of the beam surface and the detector boom surface. Since the width of the collimated fan-shaped X-ray beam in the direction of the carriage is as small as possible in view of radiation protection requirements, the displacement of the beam surface and the detector surface can cause the amount of radiation received by the detector to change obviously, resulting in vertical stripes of the image, called image arm swing.
Disclosure of Invention
It is an object of the present disclosure to improve the accuracy and correction efficiency of radiation imaging.
According to an aspect of some embodiments of the present disclosure, there is provided a boom including: a top arm; a trailing arm; and a lateral-detection displacement detection device located in a region of a top end or a bottom end of the extension direction of the trailing arm, comprising: the position calibration mechanism is positioned in the area of the first end along the extending direction of the top arm, and is fixed on the side surface of the top arm, the longitudinal arm or a detection vehicle connected with the top arm, and faces to a displacement detector of the transverse detection displacement detection device; the displacement detector is positioned in the area of the second end along the extending direction of the top arm, is fixed on the side surface of the top arm, the longitudinal arm or a vehicle connected with the top arm, is consistent with the installation height of the position calibration mechanism, faces the position calibration mechanism and is configured to acquire the position change condition of the position calibration mechanism relative to the displacement detector, generate displacement data and output the displacement data; the displacement calibration mechanism and the displacement detector are not fixed on the top arm at the same time.
In some embodiments, the boom includes a plurality of sets of lateral detection displacement detection devices thereon; the mounting heights of the different transverse detection displacement detection devices are different.
In some embodiments, the first lateral probe displacement detection device is located in a region of the top end of the extension direction of the trailing arm; and a second lateral probe displacement detection device located at a region of the bottom end of the trailing arm in the extending direction.
In some embodiments, the boom further comprises: a longitudinal direction detecting displacement detecting device comprising: the position calibration mechanism and the displacement detector are arranged in a region, close to the bottom end, on the longitudinal arm, and the displacement detector is fixed on the top arm; the position calibration mechanism of the longitudinal detection displacement detection device faces to the displacement detector of the longitudinal detection displacement detection device; and a position calibration mechanism of the longitudinal detection displacement detection device, wherein the displacement detector of the longitudinal detection displacement detection device faces the longitudinal detection displacement detection device, and the position calibration mechanism is configured to acquire the position change condition of the position calibration mechanism of the longitudinal detection displacement detection device relative to the displacement detector of the longitudinal detection displacement detection device, generate displacement data and output the displacement data.
In some embodiments, the position calibration mechanism comprises a laser emitting device and the displacement detector comprises a laser detecting device.
In some embodiments, a laser emitting apparatus includes: pen-shaped laser emitters or laser lattices.
In some embodiments, the position calibration mechanism includes an image identification and the measurement mechanism includes an image acquisition device.
In some embodiments, the boom meets at least one of the following: the top arm is configured to be horizontally arranged in use or arranged in a direction with an included angle with the horizontal plane within a first preset angle range; the longitudinal arm is a straight arm or an arc arm; or the included angle between the longitudinal arm and the top arm is a right angle, or the included angle is in a second preset angle range.
The arm support can timely acquire displacement deviation of the two ends of the arm support along the extension direction of the top wall, the displacement deviation reflects the arm swinging condition of the arm support in the moving process, so that basic data of reaction vibration conditions are conveniently provided for radiation detection data correction, and the detection accuracy of mobile radiation detection equipment adopting the arm support is improved.
According to an aspect of some embodiments of the present disclosure, there is provided a boom including: a top arm; a trailing arm; and a longitudinal direction detection displacement detection device including: the position calibration mechanism and the displacement detector are arranged in a region, close to the bottom end, on the longitudinal arm, and the displacement detector is fixed on the top arm; the position calibration mechanism faces to a displacement detector of the longitudinal detection displacement detection device; and the position calibration mechanism of the displacement detector facing the longitudinal detection displacement detection device is configured to acquire the position change condition of the position calibration mechanism of the longitudinal displacement detection device relative to the displacement detector, generate displacement data and output the displacement data.
In some embodiments, the boom further comprises: a lateral detection displacement detection device comprising: the position calibration mechanism is positioned in the area of the first end along the extending direction of the top arm, and is fixed on the side surface of the top arm, the longitudinal arm or a detection vehicle connected with the top arm, and faces to a displacement detector of the transverse detection displacement detection device; the displacement detector is positioned in the area of the second end along the extending direction of the top arm, is fixed on the side surface of the top arm, the longitudinal arm or a vehicle connected with the top arm, is consistent with the installation height of the position calibration mechanism, faces the position calibration mechanism and is configured to acquire the position change condition of the position calibration mechanism relative to the displacement detector, generate displacement data and output the displacement data; the displacement calibration mechanism and the displacement detector are not fixed on the top arm at the same time.
In some embodiments, the boom meets at least one of the following: the top arm is configured to be horizontally arranged in use or arranged in a direction with an included angle with the horizontal plane within a first preset angle range; the longitudinal arm is a straight arm or an arc arm; or the included angle between the longitudinal arm and the top arm is a right angle, or the included angle is in a second preset angle range.
According to an aspect of some embodiments of the present disclosure, there is provided a mobile radiation detection device comprising: any of the arm supports mentioned above; the vehicle is connected with one end of the top arm of the arm support and is configured to drive the arm support to move through movement; and a security inspection device comprising: a radiation emitter located in a region along a first end of an extension direction of a top arm of the arm support, configured to emit radiation to the radiation detector; and a radiation detector, which is positioned in the area of the second end along the extending direction of the top arm of the arm support, and is configured to receive the radiation from the radiation emitter of the security inspection device and generate radiation detection data.
In some embodiments, the mobile radiation detection device further comprises a processor configured to: obtaining displacement data output by a displacement detector of the arm support; acquiring radiation detection data output by a radiation detector; and correcting the radiation detection data based on the displacement data.
In some embodiments, the safety inspection device and the displacement detection device on the arm support start detection synchronously under the triggering of the same trigger.
In some embodiments, the processor is further configured to: under the condition of no-load carriage, acquiring correction parameters of radiation detection data through correction of detection images; acquiring displacement data synchronized with corrected radiation detection data in the case of an empty carriage; generating arm swing correction information comprising an association relationship of correction parameters and displacement data; correcting the radiation detection data based on the displacement data includes: determining relevant correction parameters according to the arm swing correction information and displacement data acquired in the detection process; the radiation detection data acquired during the detection are corrected according to the associated correction parameters.
The radiation detection device can timely acquire displacement deviation of the two ends of the arm support along the extension direction of the top wall, the displacement deviation reflects the arm swinging condition of the arm support in the moving process, so that the radiation detection data can be conveniently corrected by using the displacement data, and the detection accuracy of the mobile radiation detection device is improved.
According to an aspect of some embodiments of the present disclosure, there is provided an acceptance system comprising: any of the arm supports mentioned above; and a comparator configured to compare the arm swing displacement data with a predetermined arm swing displacement threshold; if the arm swing displacement data is larger than a preset arm swing displacement threshold value, determining that the flatness of the ground or the rail is lower than the acceptance criterion; and if the arm swing displacement data is not greater than the preset arm swing displacement threshold value, determining that the flatness of the ground or the track meets the acceptance criterion.
In such acceptance inspection system, can acquire the condition of cantilever crane vibration in the removal in-process to confirm whether the roughness that leads to this vibration ground or track can satisfy the demand, avoid the phenomenon that the radiation detection data that ground or track too jolt caused is difficult to restore, improve the reliability of security inspection equipment installation configuration, thereby also can improve the degree of accuracy of radiation imaging.
According to an aspect of some embodiments of the present disclosure, a security inspection method is provided, including: in the process of acquiring radiation detection data through any one of the mobile radiation detection devices, acquiring displacement data output by a displacement detector on the arm support; determining correction parameters for the radiation detection data from the displacement data; the radiation detection data is corrected according to the correction parameters.
In some embodiments, determining correction parameters for the radiation detection data from the displacement data comprises: determining relevant correction parameters according to arm swing correction information and displacement data acquired in a detection process, wherein the arm swing correction information comprises an association relation between the displacement data and the correction parameters; the radiation detection data acquired during the detection are corrected according to the associated correction parameters.
In some embodiments, the security inspection method further comprises: using the current mobile radiation detection device to empty the carriage; acquiring correction parameters of the radiation detection data by correcting the detection image; acquiring displacement data synchronized with corrected radiation detection data in the case of an empty carriage; and generating arm swing correction information comprising the association relation between the correction parameters and the displacement data.
In some embodiments, in acquiring the radiation detection data, acquiring the displacement data output by the displacement detector on the boom includes: under the condition that the vibration amplitude of the arm support is larger than a preset vibration amplitude threshold value or the vibration frequency is larger than a preset vibration frequency threshold value, the trigger signal for triggering the acquisition of the radiation detection data synchronously triggers the displacement detector to acquire the detection data, and the acquisition frequency of the radiation detector and the displacement detector is larger than the preset frequency.
In some embodiments, generating the arm swing correction information including an association of the correction parameter and the displacement data includes: acquiring single-point detection data variation of each detector pixel point in the radiation detection data at the moment of acquiring the same displacement data; measuring the median of the change of the single-point detection data of the same detector pixel point for a plurality of times at the moment of acquiring the same displacement data, and determining the correction parameters of the corresponding detector pixel point; and correlating the correction parameters of each detector pixel point with corresponding displacement data to obtain arm swing correction information.
By the method, displacement deviation of the two ends of the arm support along the extension direction of the top wall can be timely obtained in the radiation detection process, and then the displacement data are used for correcting radiation detection data, so that the detection accuracy of the mobile radiation detection equipment is improved.
Drawings
The accompanying drawings, which are included to provide a further understanding of the disclosure, illustrate and explain the present disclosure, and together with the description serve to explain the present disclosure.
FIG. 1 is a schematic diagram of the relative displacement of the beam surface and the detector boom surface.
Fig. 2A-C are schematic diagrams of some embodiments of the boom of the present disclosure, respectively.
Fig. 3A-C are schematic views of other embodiments of the boom of the present disclosure, respectively.
Fig. 4A-C are schematic diagrams of further embodiments of the boom of the present disclosure, respectively.
Fig. 5 is a schematic diagram of some embodiments of a mobile radiation detection device of the present disclosure.
Fig. 6 is a schematic diagram of some embodiments of a partial structure of a mobile radiation detection device of the present disclosure.
Fig. 7 is a schematic diagram of some embodiments of an acceptance system of the present disclosure.
Fig. 8 is a flow chart of some embodiments of the security inspection method of the present disclosure.
Detailed Description
The technical scheme of the present disclosure is described in further detail below through the accompanying drawings and examples.
The swing of the arm support can cause the image quality to be poor, and the equipment indexes such as space wires, thin material dual-energy and the like are seriously influenced. In order to improve the environment adaptability of the mobile radiation detection equipment, reduce the debugging difficulty and cost, improve the image quality, especially improve the environment adaptability of new and more flexible intelligent rail and other systems, more facilitate the popularization and application of new products and eliminate the image arm swing.
In the related art, 4 additional transverse detector modules are respectively arranged at two ends of the transverse detector arm and at the junction of the transverse detector arm and the vertical detector arm, and the method for detecting and predicting the swing of the transverse detector arm support by detecting the change of the beam intensity of the scanning vehicle during running is proposed. However, in the method, the data acquisition of the arm pendulum can only be carried out under the condition that no detected object exists in the scanning channel, and if the detected object exists in the channel, the transverse detector module is shielded, so that the X-ray dose detected by the transverse detector module is changed; in addition, the mode can not separate the dose change generated by the arm swing from the dose change caused by the detected mass thickness, and the acquired data can not truly reflect the influence of the arm swing on the image.
A schematic diagram of some embodiments of the boom of the present disclosure is shown in fig. 2A.
The boom includes a top arm 201 and a trailing arm 202. The opposite end of the top wall 201 connecting the trailing arms may be connected to a probe car. The cantilever crane is last to install horizontal displacement detection equipment, includes: and the position calibration mechanism and the displacement detector. The position calibration mechanism is located in the region of the first end in the extending direction of the top arm 201, and is fixed to the side of the top arm, the trailing arm, or the probe car connected to the top arm, toward the displacement detector of the lateral displacement detection device. The displacement detector is positioned in the area of the second end along the extending direction of the top arm, is fixed on the side surface of the top arm, the longitudinal arm or a vehicle connected with the top arm, is consistent with the installation height of the position calibration mechanism, faces the position calibration mechanism, and can acquire the position change condition of the position calibration mechanism relative to the displacement detector, generate displacement data and output. In some embodiments, the displacement data is a vector, the directions being identified by positive and negative, e.g., + -2.5 mm. The position calibration mechanism and the displacement detector are not fixed on the top arm at the same time.
In some embodiments, the first end region may be the region shown at 203, and the second region is the region shown at 204. The position calibration mechanism is fixed on the top arm or the longitudinal arm, and the displacement detector is fixed on the side surface of the top arm or a detection vehicle connected with the top arm.
In some embodiments, the first end region may be the region shown at 204, and the second region is the region shown at 203. The displacement detector is fixed on the side surface of the top arm or the detection vehicle connected with the top arm, and the position calibration mechanism is fixed on the top arm or the longitudinal arm.
The arm support can timely acquire displacement deviation of the two ends of the arm support along the extension direction of the top wall, the displacement deviation reflects the arm swinging condition of the arm support in the moving process, so that basic data of reaction vibration conditions are conveniently provided for radiation detection data correction, and the detection accuracy of mobile radiation detection equipment adopting the arm support is improved.
In some embodiments, the position calibration mechanism may include a laser emitting device, such as a pen-shaped laser emitter or a laser lattice; the displacement detector comprises a laser detection device. The arm support realizes displacement detection by utilizing a laser detection mode, and is beneficial to the reaction speed and accuracy of displacement detection.
In some embodiments, the position calibration mechanism may include an image identification and the measurement mechanism includes an image acquisition device. The image acquisition equipment determines displacement data by identifying position change and shape distortion of the image mark in the image acquisition range.
The displacement detection equipment on the arm support is low in cost and beneficial to popularization and application.
In some embodiments, the lateral displacement detection device is located in a region at the top or bottom end of the extension direction of the trailing arm. As shown in fig. 2B, the lateral displacement detecting device including the displacement detector and the position calibration mechanism may be located in the top end region, such as fixed to one of the ends of the top arm and the side wall or the vehicle side surface, such as (211, 222) or (221,212), or fixed to the side wall and the vehicle side surface, such as (221, 222), wherein one of 222 and 211 is the displacement detector and the other is the position calibration mechanism; 212 and 221, one of which is a displacement detector and the other is a position calibration mechanism; 221 and 222 are displacement detectors and the other is a position calibration mechanism. In some embodiments, the top region may be in a range higher than the height of the detected object, so as to avoid the detection process from being hidden by the detected object, and improve the reliability of detection.
In some embodiments, as shown in FIG. 2B, a lateral displacement detection device comprising a displacement detector and a position calibration mechanism may be located at the bottom end region, secured to the side wall and the vehicle side, such as (231, 232), wherein one of 232 and 231 is the displacement detector and the other is the position calibration mechanism. In some embodiments, the bottom end region range may be: in the case that the detected object is a vehicle, the height of the detected object is lower than the height of the chassis of the detected vehicle, so that the detection process is reduced to be hidden by the detected vehicle; meanwhile, the arm pendulum at the bottom is larger than the top, so that the accuracy of detection can be improved.
In some embodiments, multiple sets of lateral displacement detection devices are included on the boom, such as any of the multiple sets of lateral displacement detection devices provided in fig. 2B coexist. The mounting heights of different lateral displacement detecting devices are different. The arm support is provided with a plurality of groups of transverse displacement detection equipment, and detection accuracy can be further improved by combining detection of a plurality of position points, so that correction accuracy of radiation detection data is improved.
In some embodiments, one or more sets of lateral displacement detection devices may be disposed in the height range of the middle area of the trailing arm of the boom, as shown in fig. 2B between 221 and 231, and the detection result of other lateral displacement detection devices is combined, so that the detection accuracy can be further improved.
In some embodiments, as shown in fig. 2C, the boom further includes a longitudinal detection displacement detection device, including: and the position calibration mechanism and the displacement detector. One of the position calibration mechanism and the displacement detector is positioned on the trailing arm in a region near the bottom end and is fixed to the trailing arm at a position 242 in FIG. 2C; the other is located near the top of the trailing arm and is fixed to the top arm, as shown at 241 in FIG. 2C. The position calibration mechanism of the longitudinal detection displacement detection device faces to the displacement detector of the longitudinal detection displacement detection device.
The position calibration mechanism of the longitudinal displacement detection device can acquire the position change condition of the position calibration mechanism of the longitudinal displacement detection device relative to the position calibration mechanism of the longitudinal displacement detection device, generate displacement data and output the displacement data. In some embodiments, one of the longitudinally sensing displacement sensing devices (241, 242), 241 and 242, is a displacement sensor and the other is a position calibration mechanism.
The arm support can obtain the relative transverse displacement of the top arm and the longitudinal arm through longitudinal detection, so that the possibility of being shielded by a measured object in the using process is further reduced, the reliability and the robustness of the transverse arm swing correction are improved, and the application range is expanded.
In some embodiments, the plurality of groups of displacement detection devices on the arm support comprise a transverse displacement detection device or a transverse displacement detection device and a longitudinal displacement detection device, and the elements and the precision of the components of the transverse displacement detection device and the longitudinal displacement detection device can be the same or different, for example, part of the displacement detection devices are a laser emitting device and a laser detection device, and part of the displacement detection devices are an image identification device and an image acquisition device.
The boom can give consideration to accuracy and cost, different displacement detection devices are arranged at different positions according to the requirements on accuracy and response speed, the boom can be flexibly selected in combination with application scenes, and controllability and adaptability are improved.
In some embodiments, the top arm of the arm support may be horizontally arranged as shown in fig. 2A-2C, and in some embodiments, the top arm may achieve the effect of being horizontally arranged by connecting the vertical plane of the probe car with an angle of 90 degrees between the vertical plane of the probe car and the top arm. In other embodiments, as shown in fig. 3A-3C, the top arm 301 of the arm rest may have an included angle with the horizontal plane within a first predetermined angle range, such as [ -45 °, +45° ], where a negative angle refers to a situation where the included angle with the vertical plane of the probe car is less than 90, and a positive angle refers to a situation where the included angle with the vertical side elevation of the probe car is greater than 90. The view shown in fig. 3A-3C is about +10°.
The cantilever crane structure can provide a better displacement detection space, and reduce the possibility that the displacement detection is blocked by the detected object. In some embodiments, the top arm may have an included angle greater than 0 degrees with the horizontal plane, which can expand the range of the radiation detector deployed on the trailing arm, thereby being beneficial to improving the coverage range of the arm frame in radiation detection and reducing omission.
In some embodiments, the trailing arm may be a straight arm as shown in FIGS. 2A-2C, or may be an arc arm 302 as shown in FIGS. 3A-3C. In some embodiments, the arc arm may be protruded in an opposite direction of the probe vehicle, so as to expand a space between the probe vehicle and the trailing arm, which may accommodate the object to be measured, and expand the application range.
In some embodiments, as shown in FIG. 3A, the position calibration mechanism and the displacement detection device may be positioned (321, 322), wherein 321 is positioned above the trailing arm, 322 is positioned above the side wall of the detection vehicle, and the heights of 321 and 322 are equivalent. One of the position calibration mechanism and the displacement detection device is located at 321 and the other is located at 322.
In some embodiments, as shown in fig. 3B, the position of the position calibration mechanism and the displacement detection device may be (321,312), where 321 is located at an upper position on the trailing arm and 312 is located at a position on the top arm near the probe car, one of the position calibration mechanism and the displacement detection device being located 321 and the other being located 312.
In some embodiments, as shown in fig. 3C, the position calibration mechanism and the displacement detection device may be located (311,331), wherein 311 is located on the top arm near the trailing arm, 331 is located on the trailing arm near the bottom end, and one of the position calibration mechanism and the displacement detection device is located at 311 and the other is located at 331.
In some embodiments, the trailing arm may be perpendicular to the top arm as shown in FIGS. 2A-2C, or may be non-perpendicular to the top arm 401 as shown by the trailing arm 402 in FIGS. 4A-4C. The included angle between the trailing arm 402 and the top arm 401 may be within a second predetermined range, for example, within the range of [90 °,135 ° ], so that the space between the probe car and the trailing arm, which can accommodate the object to be measured, is enlarged, and the application range is expanded.
In some embodiments, as shown in FIG. 4A, the position calibration mechanism and the displacement detection device may be located (421, 422), where 421 is located at an upper position on the trailing arm and 422 is located at an upper position on the side wall of the probe vehicle, where 421 is comparable to 422 in height. One of the position calibration mechanism and the displacement detection device is located at 421 and the other is located at 422.
In some embodiments, as shown in fig. 4B, the position of the position calibration mechanism and the displacement detection device may be (421,412), where 421 is located at an upper position on the trailing arm, 412 is located at a position on the top arm near the probe car, and one of the position calibration mechanism and the displacement detection device is located 421 and the other is located 412.
In some embodiments, as shown in fig. 4C, the positions of the position calibration mechanism and the displacement detection device may be (411, 431), where 411 is located on the top arm near the trailing arm, 431 is located on the trailing arm near the bottom end, and one of the position calibration mechanism and the displacement detection device is located 411, and the other is located 431.
A schematic diagram of some embodiments of the mobile radiation detection device of the present disclosure is shown in fig. 5. Boom 52 may be any of those mentioned above. One end of the boom top arm is connected to the vehicle 51. The vehicle 51 can move the boom by moving. In some embodiments, a portion 54 of the security device may be provided on the vehicle 51 and another portion of the security device may be provided on the trailing arm of the boom. The security inspection device comprises: a radiation emitter and a radiation detector. The ray emitter is located along the region of the first end of the extension direction of the top arm of the arm support, and can emit rays to the ray detector. The radiation detector is located in the area of the second end along the extending direction of the top arm of the arm support, and can receive radiation from the radiation emitter of the security inspection device to generate radiation detection data. In some embodiments, 53 is a radiation emitter and 54 is a radiation detector; in some embodiments, 54 is a radiation emitter and 53 is a radiation detector.
The radiation detection device can timely acquire displacement deviation of the two ends of the arm support along the extension direction of the top wall, the displacement deviation reflects the vibration condition of the arm support in the moving process, so that the radiation detection data can be conveniently corrected by using the displacement data, and the detection accuracy of the mobile radiation detection device is improved.
In some embodiments, a radiation detector may also be disposed on a top arm of a boom of the mobile radiation detection device, and a radiation emitter may be disposed near the ground of a running area, such as the boom, to implement longitudinal detection of the object under test. In some embodiments, the radiation emitted by the radiation detector located on the vehicle 51 may be received by the radiation detector located on the top arm, thereby expanding the detection imaging range and reducing radiation losses.
In some embodiments, the mobile radiation detection device further comprises a processor, as shown in fig. 6, and the processor 603 is respectively in signal connection with the displacement detector 602 on the arm support and the radiation detector 601 of the security inspection device in a wired or wireless manner. The processor 603 can acquire displacement data output by the displacement detector of the arm support, acquire radiation detection data output by the radiation detector, and correct the radiation detection data according to the displacement data.
In some embodiments, the safety inspection device and the displacement detection device on the arm support start detection synchronously under the triggering of the same trigger. In some embodiments, the displacement detector may be triggered to acquire detection data synchronously by a trigger signal that triggers acquisition of the radiation detection data, and the acquisition frequency of the radiation detector and the displacement detector is greater than a predetermined frequency, thereby improving the synchronicity of both data.
In some embodiments, the vibration amplitude and vibration frequency of the boom may be detected or estimated. Under the condition that the vibration amplitude (such as 2.5 mm) of the arm support is larger than a preset vibration amplitude threshold (such as 1 mm) or the vibration frequency (such as 20 Hz) is larger than a preset vibration frequency threshold (such as 15 Hz), the requirement on synchronism of arm swing displacement data and radiation detection data is improved, and a mode that a trigger signal for triggering acquisition of the radiation detection data is adopted to synchronously trigger a displacement detector to acquire detection data, and the acquisition frequency of the radiation detector and the displacement detector is larger than a preset frequency is adopted. Under the condition that the vibration amplitude of the arm support is smaller than or equal to a preset vibration amplitude threshold value and the vibration frequency (such as 2-3 Hz or smaller than the data acquisition frequency of the radiation detector) is smaller than or equal to the preset vibration frequency threshold value, the requirement on the data synchronization degree is reduced, and the radiation detector and the displacement detector can be acquired respectively.
In some embodiments, in actual use, the synchronization degree of data acquisition can be selected according to the vibration frequency and amplitude of the arm support, so as to determine whether the operation of synchronously triggering the displacement detector and the radiation detector to acquire data by adopting the same trigger signal is needed, thereby improving the adaptability to the environment.
In some embodiments, the processor 603 may pre-store arm swing correction information including an association relationship between correction parameters and displacement data, determine correction parameters to be used based on the information and the displacement data, and correct the radiation detection data with the determined correction parameters, so as to improve the correction parameters of the arm swing obtained based on the arm swing displacement data obtained in the use process, correct the radiation detection data, improve the accuracy of radiation imaging, and improve the correction efficiency of the radiation detection data.
In some embodiments, the processor 603 is also capable of acquiring correction parameters of the radiation detection data by correction of the detection image in the case of an empty carriage, and acquiring displacement data synchronized with the corrected radiation detection data in the case of an empty carriage. The processor 603 generates arm swing correction information comprising an association of correction parameters and displacement data, and further determines associated correction parameters during application from the arm swing correction information and displacement data acquired during detection, and corrects radiation detection data acquired during detection using the associated correction parameters. Empty carriage refers to a process in which the region in the arm frame does not include a vehicle or a box body, and the empty carriage moves under the drive of a detection vehicle (such as a vehicle 51) and performs detection on air. In some embodiments, considering that the obtained association is discrete, a linear or nonlinear relationship between the correction parameter of each detector pixel point and the arm pendulum displacement data may be obtained based on discrete points, thereby ensuring that the corresponding correction parameter can be matched during use.
The movable radiation detection equipment can obtain the influence of the arm frame on the radiation detection device and the displacement detector under the condition of no object blocking in an empty-load carriage mode, and the relevance of the influence on the radiation detection device and the displacement detector, so that arm swing correction information corresponding to the security detection equipment one by one is generated, and the equipment self-adaption degree and accuracy of the arm swing correction are improved.
In some embodiments, the present disclosure proposes an acceptance system. The acceptance system includes any of the arm supports 71 mentioned above, and a comparator 72 connected to a displacement detector on the arm support. The comparator 72 is capable of comparing the arm swing displacement data with a predetermined arm swing displacement threshold; if the arm swing displacement data is larger than a preset arm swing displacement threshold value, determining that the flatness of the ground or the rail is lower than the acceptance criterion; and if the arm swing displacement data is not greater than the preset arm swing displacement threshold value, determining that the flatness of the ground or the track meets the acceptance criterion.
The checking and accepting system can acquire the vibration condition of the arm support in the moving process, so that whether the flatness of the ground or the rail which causes the vibration can meet the requirement is determined, the phenomenon that radiation detection data are difficult to repair due to too bumpy ground or rail is avoided, the reliability of installation and configuration of security inspection equipment is improved, and the accuracy of radiation imaging can be improved.
In some embodiments, if the arm pendulum includes a plurality of displacement detectors, a predetermined arm pendulum displacement threshold corresponding to each displacement detector may be set, and when any displacement data exceeds its corresponding predetermined arm pendulum displacement threshold, the acceptance criterion is considered to be not met, thereby improving the accuracy of acceptance.
A flowchart of some embodiments of the security inspection method of the present disclosure is shown in fig. 8.
In step 801, displacement data output by a displacement detector on the boom is acquired during the acquisition of radiation detection data by any of the mobile radiation detection devices mentioned above. In some embodiments, where there are multiple displacement detectors on the boom, displacement data output by each displacement detector is obtained.
In step 802, correction parameters for the radiation detection data are determined from the displacement data. In some embodiments, arm swing correction information may be pre-stored, where the arm swing correction information includes an association between displacement data and correction parameters, and in use, the associated correction parameters are obtained by matching queries for the displacement data based on the arm swing correction information. In some embodiments, the arm swing correction information may be a table of association between displacement data and correction parameters, or a curve of association between displacement data and correction parameters.
In some embodiments, in the case that the plurality of displacement detectors is provided, the corresponding relationship between the array formed by the displacement data obtained by the plurality of displacement detectors and the correction parameters is included in the arm swing correction information, so that accuracy of obtaining the correction parameters of the radiation detection data based on the arm swing correction information matching is improved.
In step 803, the radiation detection data is corrected according to the correction parameters. In some embodiments, radiation detection data acquired during detection may be corrected according to associated correction parameters.
By the method, displacement deviation of the two ends of the arm support along the extension direction of the top wall can be timely obtained in the radiation detection process, and then the displacement data are used for correcting radiation detection data, so that the detection accuracy of the mobile radiation detection equipment is improved.
In some embodiments, in order to ensure the accuracy of the arm swing correction information, in consideration of individual differences of security inspection equipment, even if the vibration response of equipment of the same model to jolts is not completely the same, no-load carriage can be carried out for each arm frame to obtain the arm swing correction information suitable for the arm swing. In some embodiments, the position of each detector in the process of generating arm swing correction information by the empty carriage is the same as that in the actual application process, so that the correction accuracy is further ensured.
In some embodiments, the current mobile radiation detection device empty carriage may be used prior to security detection using the current mobile radiation detection device. And acquiring correction parameters of the radiation detection data through correction of the detection image, and acquiring displacement data which are time-synchronous with the corrected radiation detection data under the condition of no-load carriage, so as to generate arm swing correction information comprising the association relation between the correction parameters and the displacement data.
By the method, the influence on the radiation detection device and the displacement detector and the relevance of the influence on the radiation detection device and the displacement detector when the arm support vibrates can be obtained in an empty-load carriage mode, so that arm swing correction information corresponding to the security inspection equipment one by one is generated, and the equipment self-adaption degree and accuracy of the arm swing correction are improved.
In some embodiments, considering that the obtained association is discrete, a linear or nonlinear relationship between the correction parameter of each detector pixel point and the arm pendulum displacement data may be obtained based on discrete points, thereby ensuring that the corresponding correction parameter can be matched during use.
In some embodiments, when the vibration amplitude of the boom is greater than a predetermined vibration amplitude threshold value, or the vibration frequency is greater than a predetermined vibration frequency threshold value, the displacement detector is synchronously triggered to acquire detection data by triggering a trigger signal for acquiring radiation detection data, and the acquisition frequency of the radiation detector and the displacement detector is greater than a predetermined frequency, so that the synchronism of the two data is improved.
In some embodiments, in the process of generating the arm swing correction data, if the same displacement data is acquired by the same displacement detector at different moments, the single-point detection data variation of each detector pixel point in the radiation detection data at each corresponding moment is obtained; and under the moment of acquiring the same displacement data, measuring the median of the multiple single-point detection data changes of the same detector pixel, determining the correction parameters of the corresponding detector pixel, and further associating the correction parameters of each detector pixel with the corresponding displacement data to acquire the arm swing correction information. By the method, influence caused by accidental factors can be reduced, and accuracy of arm swing correction information is improved.
In some embodiments, if the processed radiation detection data is radiation imaging, the single-point detection data may be the brightness P of the corresponding pixel point in the image, and the single-point detection data variation is the variation of the P value. This way, the data correction is converted into image restoration, which is more intuitive and reliable.
The radiation detection data correction method has the characteristics of strong applicability and good correction effect, and can be widely applied to various mobile detection devices. The method can be applied to traditional detection equipment such as combined type detection equipment and vehicle-mounted detection equipment, and also can be applied to equipment such as ground walking self-adaptive scanning equipment (intelligent rail) with high flexibility. The image quality can be greatly improved, the spatial silk and spatial resolution and the dual-energy substance identification of thin materials can be improved, and the dual-energy substance identification is not influenced by the environment (ground or rail flatness, arm support rigidity and the like). The method can also improve the environment adaptability of the equipment, does not need to input excessive manpower and material resources in adjustment of the ground/rail flatness, scanning speed and stability control, strict requirements on the rigidity of the arm support and the like, and reduces the cost and improves the efficiency.
In some embodiments, the flatness of the ground or track may also be checked during use by solely using the detection results of the displacement detector. For example, comparing the displacement data to a predetermined arm swing displacement threshold; if the arm swing displacement data is larger than a preset arm swing displacement threshold value, determining that the flatness of the ground or the rail is lower than the acceptance criterion; and if the arm swing displacement data is not greater than the preset arm swing displacement threshold value, determining that the flatness of the ground or the track meets the acceptance criterion.
By the method, the phenomenon that radiation detection data are difficult to repair caused by too bumpy ground or track can be avoided, and the reliability of installation and configuration of security inspection equipment is improved, so that the accuracy of radiation imaging can be improved.
The present disclosure is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems) and computer program products according to embodiments of the disclosure. It will be understood that each flow and/or block of the flowchart illustrations and/or block diagrams, and combinations of flows and/or blocks in the flowchart illustrations and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
Thus far, the present disclosure has been described in detail. In order to avoid obscuring the concepts of the present disclosure, some details known in the art are not described. How to implement the solutions disclosed herein will be fully apparent to those skilled in the art from the above description.
The methods and apparatus of the present disclosure may be implemented in a number of ways. For example, the methods and apparatus of the present disclosure may be implemented by software, hardware, firmware, or any combination of software, hardware, firmware. The above-described sequence of steps for the method is for illustration only, and the steps of the method of the present disclosure are not limited to the sequence specifically described above unless specifically stated otherwise. Furthermore, in some embodiments, the present disclosure may also be implemented as programs recorded in a recording medium, the programs including machine-readable instructions for implementing the methods according to the present disclosure. Thus, the present disclosure also covers a recording medium storing a program for executing the method according to the present disclosure.
Finally, it should be noted that: the above embodiments are merely for illustrating the technical solution of the present disclosure and are not limiting thereof; although the present disclosure has been described in detail with reference to preferred embodiments, those of ordinary skill in the art will appreciate that: modifications may be made to the specific embodiments of the disclosure or equivalents may be substituted for part of the technical features; without departing from the spirit of the technical solutions of the present disclosure, it should be covered in the scope of the technical solutions claimed in the present disclosure.
Claims (18)
1. A boom, comprising:
a top arm;
a trailing arm; and
a lateral detection displacement detection device located in a region of a top end or a bottom end of an extension direction of the trailing arm, comprising:
the position calibration mechanism is positioned in the area along the first end of the extending direction of the top arm, is fixed on the side surface of the top arm, the longitudinal arm or a detection vehicle connected with the top arm, and faces the displacement detector of the transverse detection displacement detection device; and
a displacement detector located in a region along a second end of the extension direction of the top arm, fixed to the top arm, the trailing arm, or a side surface of a vehicle connected to the top arm, and oriented to the position calibration mechanism at a mounting height consistent with that of the position calibration mechanism, and configured to acquire a position change condition of the position calibration mechanism with respect to the displacement detector, generate displacement data, and output the displacement data;
The position calibration mechanism and the displacement detector are not fixed on the top arm at the same time, the range of the area at the top end is higher than the height of the detected object, and the range of the area at the bottom end is lower than the height of the chassis of the detected vehicle under the condition that the detected object is a vehicle.
2. Boom according to claim 1, wherein,
the arm support comprises a plurality of groups of transverse detection displacement detection equipment; the mounting heights of the transverse detection displacement detection devices are different.
3. Boom according to claim 2, wherein,
a first lateral detection displacement detection device is positioned at a region of the top end of the longitudinal arm in the extending direction; and
the second lateral detection displacement detection device is located in a region of the bottom end of the trailing arm in the extending direction.
4. A boom according to any of claims 1-3, wherein said position calibration mechanism comprises a laser emitting device and said displacement detector comprises a laser detecting device.
5. The boom of claim 4, wherein the laser emitting apparatus comprises: pen-shaped laser emitters or laser lattices.
6. A boom according to any of claims 1-3, wherein said position calibration mechanism comprises an image identifier and said displacement detector comprises an image acquisition device.
7. The boom of claim 1, further comprising: a longitudinal direction detecting displacement detecting device comprising:
the position calibration mechanism and the displacement detector are positioned in an area, close to the bottom end, of the longitudinal arm and are fixed on the longitudinal arm; the other is positioned in the area of the longitudinal arm close to the top end and is fixed on the top arm;
the position calibration mechanism faces the displacement detector of the longitudinal detection displacement detection device; and
the displacement detector faces the position calibration mechanism of the longitudinal detection displacement detection device and is configured to acquire the position change condition of the position calibration mechanism of the longitudinal displacement detection device relative to the displacement detector, generate displacement data and output the displacement data.
8. The boom of any of claims 1-3 or 7, wherein the boom meets at least one of:
the top arm is configured to be horizontally arranged in the use process or arranged in a direction of an included angle with the horizontal plane within a first preset angle range;
the longitudinal arm is a straight arm or an arc arm; or (b)
The included angle between the longitudinal arm and the top arm is a right angle or is within a second preset angle range.
9. A mobile radiation detection device comprising:
The boom of any of claims 1-8;
the vehicle is connected with one end of the top arm of the arm support and is configured to drive the arm support to move through movement; and
a security inspection apparatus comprising:
a radiation emitter located at a region along a first end of an extension direction of a top arm of the arm support, configured to emit radiation to a radiation detector;
and the radiation detector is positioned in the area of the second end along the extending direction of the top arm of the arm support and is configured to receive the radiation from the radiation emitter of the security inspection device and generate radiation detection data.
10. The mobile radiation detection device of claim 9, further comprising a processor configured to:
obtaining displacement data output by a displacement detector of the arm support;
acquiring radiation detection data output by the radiation detector; and
correcting the radiation detection data based on the displacement data.
11. A mobile radiation detection device according to claim 9, wherein the security inspection device and the displacement detection device on the boom start detection simultaneously triggered by the same trigger.
12. The mobile radiation detection apparatus as recited in claim 10, wherein,
The processor is further configured to:
under the condition of no-load carriage, acquiring correction parameters of radiation detection data through correction of detection images;
acquiring displacement data synchronized with corrected radiation detection data in the case of an empty carriage;
generating arm swing correction information comprising an association relationship of correction parameters and displacement data;
said correcting said radiation detection data based on said displacement data comprises:
determining relevant correction parameters according to the arm swing correction information and displacement data acquired in the detection process;
the radiation detection data acquired during the detection are corrected according to the associated correction parameters.
13. An acceptance system comprising:
the boom of any of claims 1-8; and
a comparator configured to compare the arm swing displacement data with a predetermined arm swing displacement threshold; if the arm swing displacement data is larger than the preset arm swing displacement threshold value, determining that the flatness of the ground or the rail is lower than the acceptance criterion; and if the arm swing displacement data is not greater than the preset arm swing displacement threshold value, determining that the flatness of the ground or the rail meets the acceptance criterion.
14. A security inspection method comprising:
in the process of acquiring radiation detection data by the mobile radiation detection apparatus according to any one of claims 9 to 12, acquiring displacement data output by a displacement detector on the boom;
Determining correction parameters for the radiation detection data from the displacement data;
correcting the radiation detection data according to the correction parameters.
15. The security inspection method of claim 14, wherein the determining correction parameters for the radiation detection data from the displacement data comprises:
determining relevant correction parameters according to arm swing correction information and displacement data acquired in a detection process, wherein the arm swing correction information comprises an association relation between the displacement data and the correction parameters;
the radiation detection data acquired during the detection are corrected according to the associated correction parameters.
16. The security inspection method of claim 15, further comprising:
using the current mobile radiation detection device to empty the carriage;
acquiring correction parameters of the radiation detection data by correcting the detection image;
acquiring displacement data synchronized with corrected radiation detection data in the case of an empty carriage;
and generating arm swing correction information comprising the association relation between the correction parameters and the displacement data.
17. The security inspection method of claim 14, wherein, in acquiring the radiation detection data, acquiring displacement data output by a displacement detector on the boom comprises:
And under the condition that the vibration amplitude of the arm support is larger than a preset vibration amplitude threshold value or the vibration frequency is larger than a preset vibration frequency threshold value, synchronously triggering the displacement detector to acquire detection data by triggering a trigger signal for acquiring radiation detection data, wherein the acquisition frequency of the ray detector and the displacement detector is larger than the preset frequency.
18. The security inspection method of claim 16, wherein the generating arm swing correction information including an association of correction parameters and displacement data comprises:
acquiring single-point detection data variation of each detector pixel point in the radiation detection data at the moment when the same displacement data are acquired;
measuring the median of the change of the single-point detection data of the same detector pixel point for a plurality of times at the moment of acquiring the same displacement data, and determining the correction parameters of the corresponding detector pixel point;
and correlating the correction parameters of each detector pixel point with corresponding displacement data to obtain the arm swing correction information.
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| CN202111074033.7A CN115616008B (en) | 2021-07-13 | 2021-07-13 | Arm support, mobile radiation detection equipment, acceptance system and security inspection method |
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| CN202110787122.XA CN113252713B (en) | 2021-07-13 | 2021-07-13 | Arm support, mobile radiation detection equipment, acceptance inspection system and security inspection method |
| CN202111074033.7A CN115616008B (en) | 2021-07-13 | 2021-07-13 | Arm support, mobile radiation detection equipment, acceptance system and security inspection method |
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| CN113252713B (en) | 2021-10-08 |
| PL441723A1 (en) | 2023-01-16 |
| CN113252713A (en) | 2021-08-13 |
| CN115616008A (en) | 2023-01-17 |
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