CN115616008A - Arm support, mobile radiation detection equipment, acceptance inspection system and security inspection method - Google Patents
Arm support, mobile radiation detection equipment, acceptance inspection system and security inspection method Download PDFInfo
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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
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- F16M11/04—Means for attachment of apparatus; Means allowing adjustment of the apparatus relatively to the stand
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- 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
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- 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
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- 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
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Abstract
The disclosure provides an arm support, a mobile radiation detection device, an acceptance system and a security inspection method, and relates to the technical field of security inspection. This disclosed cantilever crane includes: a top arm; a trailing arm; and, a lateral-detection-displacement detecting device including: the position calibration mechanism is positioned in the area of the first end along the extension direction of the top arm, is fixed on the top arm, the longitudinal arm or the side surface of 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 extension direction of the top arm, is fixed on the top arm, the longitudinal arm or the side surface of the 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; and the displacement calibration mechanism and the displacement detector are not fixed on the top arm at the same time. The arm support can improve the detection accuracy of the mobile radiation detection equipment adopting the arm support.
Description
The application is a divisional application of an original application with the application number of 202110787122.X (application date is 2021, 7 and 13, the name of the invention is arm support, mobile radiation detection equipment, acceptance system and security inspection method).
Technical Field
The disclosure relates to the technical field of security inspection, in particular to a boom, a mobile radiation detection device, an acceptance inspection system and a security inspection method.
Background
In the field of radiation imaging, the beam flow plane and the array detector plane are required to be coplanar, and if the coplanarity changes during the imaging process, the image quality is deteriorated. Therefore, it is necessary to detect the change of the coplanarity in real time, process the data, correct the image, and improve the image quality.
For mobile inspection equipment, such as vehicle-mounted and combination mobile, there are certain requirements for the flatness of the floor or track and the stability of the control of the movement of the equipment in the case of active scanning in order to reduce the vibration of the equipment during movement. However, during the actual walking process of the device, a certain degree of vibration always occurs, and particularly for a ground walking adaptive scanning device (smart rail system) which is just emerging in recent years, the imaging system of the device faces a more complex and changeable environment, and the device vibration is more severe. As shown in fig. 1, the vibration causes relative displacement of the beam surface and the detector boom surface. Due to the requirement of radiation protection, the width of the collimated fan-shaped X-ray beam in the carriage direction is as small as possible, which may cause the displacement of the beam surface and the detector surface to cause the amount of radiation received by the detector to change significantly, resulting in vertical stripes in the image, which is called as image pendulums.
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 detecting device, which is located in a region of a top end or a bottom end of an extending direction of the trailing arm, including: the position calibration mechanism is positioned in the area of the first end along the extension direction of the top arm, is fixed on the top arm, the longitudinal arm or the side surface of a detection vehicle connected with the top arm, and faces towards the displacement detector of the transverse detection displacement detection equipment; the displacement detector is positioned in the area of the second end along the extension direction of the top arm, is fixed on the top arm, the longitudinal arm or the side surface of the 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; wherein, the displacement calibration mechanism and the displacement detector are not fixed on the top arm at the same time.
In some embodiments, the boom comprises a plurality of sets of lateral detection displacement detection devices; the mounting heights of different lateral detection displacement detection devices are different.
In some embodiments, the first lateral-detection-displacement detecting device is located in a region of a tip of the extending direction of the trailing arm; and a second lateral-detection-displacement detecting device is located in a region of the bottom end of the extending direction of the trailing arm.
In some embodiments, the boom further comprises: longitudinal-detection displacement detection apparatus comprising: one of the position calibration mechanism and the displacement detector is positioned on the area, close to the bottom end, of the trailing arm and fixed on the trailing arm, and the other one of the position calibration mechanism and the displacement detector is positioned on the area, close to the top end, of the trailing arm and fixed on the top arm; a position calibration mechanism of the longitudinal detection displacement detection equipment faces a displacement detector of the longitudinal detection displacement detection equipment; and the displacement detector of the longitudinal detection displacement detection device faces the position calibration mechanism of 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 displacement detection device relative to the displacement detector of the longitudinal 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: a pen-shaped laser emitter or a laser dot matrix.
In some embodiments, the position calibration mechanism includes an image marker and the measurement mechanism includes an image acquisition device.
In some embodiments, the boom conforms to at least one of: the top arm is configured to be arranged horizontally in use or arranged in a direction with an included angle with the horizontal plane within a first predetermined 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 within a second preset angle range.
The displacement deviation of the arm support along the two ends of the extending direction of the top wall can be obtained in time, and the displacement deviation reflects the arm swing condition of the arm support in the moving process, so that basic data reflecting the vibration condition can be provided for radiation detection data correction conveniently, and the detection accuracy of the 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-detection-displacement detecting device including: one of the position calibration mechanism and the displacement detector is positioned on the area, close to the bottom end, of the trailing arm and is fixed on the trailing arm, and the other position calibration mechanism is positioned on the area, close to the top end, of the trailing arm and is fixed on the top arm; the position calibration mechanism faces a displacement detector of the longitudinal detection displacement detection equipment; and the position calibration mechanism is arranged on the displacement detector and faces the longitudinal detection displacement detection equipment, and is configured to acquire the position change condition of the position calibration mechanism of the longitudinal displacement detection equipment relative to the displacement detector, generate displacement data and output the displacement data.
In some embodiments, the boom further comprises: lateral detection displacement detection apparatus comprising: the position calibration mechanism is positioned in the area of the first end along the extension direction of the top arm, is fixed on the top arm, the longitudinal arm or the side surface of a detection vehicle connected with the top arm, and faces towards the displacement detector of the transverse detection displacement detection equipment; the displacement detector is positioned in the area of the second end along the extension direction of the top arm, is fixed on the top arm, the longitudinal arm or the side surface of the 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; and the displacement calibration mechanism and the displacement detector are not fixed on the top arm at the same time.
In some embodiments, the boom conforms to at least one of: the top arm is configured to be arranged horizontally in use or arranged in a direction with an included angle with the horizontal plane within a first predetermined 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 within a second preset angle range.
According to an aspect of some embodiments of the present disclosure, there is provided a mobile radiation detection apparatus comprising: any one of the arm supports mentioned hereinbefore; 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 device comprising: the radiation emitter is positioned in the area of the first end of the extension direction of the top arm of the arm support and is configured to emit radiation to the radiation detector; and the radiation detector is positioned in the area of the second end along the extension direction of the top arm of the arm support and is configured to receive the radiation from the radiation emitter of the security inspection equipment and generate radiation detection data.
In some embodiments, the mobile radiation detection device further comprises a processor configured to: acquiring displacement data output by a displacement detector of the arm support; acquiring radiation detection data output by a ray detector; and correcting the radiation detection data based on the displacement data.
In some embodiments, the security inspection device and the displacement detection device on the arm support synchronously start to detect 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 a detection image; acquiring displacement data synchronous with radiation detection data corrected under the condition of no-load carriage; generating arm pendulum correction information comprising an association relation between the correction parameters and the displacement data; correcting the radiation detection data according to the displacement data includes: determining related correction parameters according to the arm pendulum correction information and displacement data acquired in the detection process; radiation detection data acquired during the detection process is corrected in accordance with the associated correction parameters.
The radiation detection equipment can timely acquire displacement deviations of the two ends of the arm support along the extension direction of the top wall, and the displacement deviations reflect the arm swing 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 equipment is improved.
According to an aspect of some embodiments of the present disclosure, there is provided an acceptance system, comprising: any one of the arm supports mentioned hereinbefore; 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 track is lower than an acceptance standard; and if the arm swing displacement data are not larger than the preset arm swing displacement threshold, determining that the flatness of the ground or the track meets the acceptance standard.
In the acceptance system, the vibration condition of the arm support in the moving process can be obtained, so that whether the flatness of the ground or the track causing the vibration can meet the requirement or not is determined, the phenomenon that radiation detection data are difficult to repair due to the fact that the ground or the track is too bumpy is avoided, the reliability of installation and configuration of security inspection equipment is improved, and the accuracy of radiation imaging can be improved.
According to an aspect of some embodiments of the present disclosure, there is provided a security inspection method, including: in the process of acquiring radiation detection data through any one of the mobile radiation detection devices mentioned above, 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 the correction parameter for the radiation detection data from the displacement data comprises: determining related correction parameters according to the arm swing correction information and displacement data acquired in the detection process, wherein the arm swing correction information comprises the association relationship between the displacement data and the correction parameters; radiation detection data acquired during the detection is corrected in accordance with the associated correction parameters.
In some embodiments, the security check method further comprises: using a current mobile radiation detection device to travel without load; acquiring correction parameters of radiation detection data by correcting the detection image; acquiring displacement data synchronous with radiation detection data corrected under the condition of no-load carriage; and generating arm swing correction information including the association relationship between the correction parameters and the displacement data.
In some embodiments, in the process of 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, a trigger signal for triggering the collection of the radiation detection data synchronously triggers a displacement detector to collect the detection data, and the collection frequencies of the radiation detector and the displacement detector are larger than a preset frequency.
In some embodiments, generating the arm swing correction information including the association of the correction parameter and the displacement data includes: acquiring the variation of single-point detection data of each detector pixel point in the radiation detection data at the moment of acquiring the same displacement data; measuring the median of multiple single-point detection data changes of the same detector pixel point at the moment of acquiring the same displacement data, and determining the correction parameters of the corresponding detector pixel point; and associating the correction parameters of each detector pixel point with the corresponding displacement data to obtain the arm swing correction information.
By the method, the displacement deviation of the arm support along the two ends of the extension direction of the top wall can be obtained in time in the radiation detection process, and then the radiation detection data is corrected by using the displacement 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 and are incorporated in and constitute a part of this disclosure, illustrate embodiments of the disclosure and together with the description serve to explain the disclosure and not to limit the disclosure.
Fig. 1 is a schematic diagram of the relative displacement of the beam surface and the detector arm support surface.
Fig. 2A-C are schematic views of some embodiments of the boom of the present disclosure, respectively.
Fig. 3A to C are schematic views of other embodiments of the boom of the present disclosure, respectively.
Fig. 4A to C are schematic views of arm rests according to further embodiments of the present disclosure, respectively.
Fig. 5 is a schematic view of some embodiments of mobile radiation detection apparatus of the present disclosure.
Fig. 6 is a schematic view of some embodiments of a partial structure of a mobile radiation detection apparatus of the present disclosure.
Figure 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 a security method of the present disclosure.
Detailed Description
The technical solution of the present disclosure is further described in detail by the accompanying drawings and embodiments.
The swing of the arm support can cause the image quality to be poor, and can cause serious influence on equipment indexes such as space silk and thin matter dual energy. In order to improve the environmental adaptability of the mobile radiation detection device, reduce the difficulty and cost of debugging, and improve the image quality, especially to improve the environmental adaptability of new and more flexible systems such as smart rails, which is more convenient for the popularization and application of new products, the image arm swing needs to be eliminated.
In the related art, a method for detecting and predicting the swing of the arm support of the horizontal and vertical detector by respectively arranging 4 additional horizontal detector modules at two ends of the horizontal and vertical detector arms and at the junction of the horizontal and vertical detector arms and detecting the change of beam intensity of a scanning vehicle during walking is provided. However, the method can only acquire data of the arm pendulum without a detected object in the scanning channel, and if the detected object exists in the scanning channel, the transverse detector module is shielded, so that the X-ray dosage detected by the transverse detector module is changed; in addition, the dose change generated by the arm swing cannot be separated from the dose change caused by the mass and thickness of the detected object in such a mode, and the acquired data cannot really reflect the influence of the arm swing on the image.
A schematic view of some embodiments of the boom of the present disclosure is shown in fig. 2A.
The boom comprises a top arm 201 and a trailing arm 202. The opposite end of the top wall 201 to which the trailing arm is attached may be attached to a probe vehicle. Install lateral displacement detection equipment on the cantilever crane, include: a position calibration mechanism and a displacement detector. The position calibration mechanism is located in the area of the first end along the extension direction of the top arm 201, is fixed to the side of the top arm, the trailing arm or the probe car connected to the top arm, and faces the displacement detector of the lateral displacement probe device. The displacement detector is located in the area of the second end of the top arm in the extending direction, is fixed on the top arm, the longitudinal arm or the side face of the vehicle connected with the top arm, is consistent with the installation height of the position calibration mechanism, faces the position calibration mechanism, can acquire the position change condition of the position calibration mechanism relative to the displacement detector, generates displacement data and outputs the displacement data. In some embodiments, the displacement data is a vector, with directions identified by plus or minus, such as ± 2.5mm. 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 may be 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 top arm or the side surface of 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 may be the region shown at 203. The displacement detector is fixed on the top arm or the side surface of the detection vehicle connected with the top arm, and the position calibration mechanism is fixed on the top arm or the longitudinal arm.
The displacement deviation of the arm support along the two ends of the extending direction of the top wall can be obtained in time, and the displacement deviation reflects the arm swing condition of the arm support in the moving process, so that basic data reflecting the vibration condition can be provided for radiation detection data correction conveniently, and the detection accuracy of the 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 dot matrix; the displacement detector comprises a laser detection device. The arm support realizes displacement detection by using a laser detection mode, and is favorable for the response speed and accuracy of displacement detection.
In some embodiments, the position calibration mechanism may include an image marker and the measurement mechanism includes an image acquisition device. The image acquisition equipment determines displacement data by identifying the position change and the shape distortion of the image identification in the image acquisition range.
The displacement detection equipment on the arm support has low cost and is beneficial to popularization and application.
In some embodiments, the lateral displacement detecting device is located in a region of a top end or a bottom end of the extending 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 two ends of the top arm and the side wall or the vehicle side, such as (211, 222) or (221, 212), or fixed to the side wall and the vehicle side, such as (221, 222), wherein one of 222 and 211 is the displacement detector and the other is the position calibration mechanism; one of 212 and 221 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 range of the top end region may be a height higher than the detected object, so as to avoid hiding of the detected object during the detection process, and improve the reliability of the detection.
In some embodiments, as shown in FIG. 2B, a lateral displacement detection device including a displacement detector and a position calibration mechanism may be located in the bottom end region, fixed to the sidewall and the side of the vehicle, e.g. (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 ranges may be: when the detected object is a vehicle, the height of the detected object is lower than the height of the detected vehicle chassis, so that the hidden phenomenon of the detected vehicle in the detection process is reduced; meanwhile, the arm swing at the bottom is larger than that at the top, so that the arm support can improve the detection accuracy.
In some embodiments, the boom includes multiple sets of lateral displacement detection devices, such as any of the multiple sets of lateral displacement detection devices set in fig. 2B. The mounting heights of different lateral displacement detection devices are different. The arm support is provided with a plurality of groups of transverse displacement detection devices, and the detection accuracy can be further improved by combining the detection of a plurality of position points, so that the accuracy of the correction of radiation detection data is improved.
In some embodiments, one or more sets of lateral displacement detection devices may also be disposed in the height range of the middle region of the trailing arm of the boom, such as between 221 and 231 shown in fig. 2B, and the detection result of other lateral displacement detection devices is combined, so as to further improve the detection accuracy.
In some embodiments, as shown in fig. 2C, the boom further includes a longitudinal detection displacement detection device, including: a position calibration mechanism and a displacement detector. One of the position calibration mechanism and the displacement detector is located on the trailing arm near the lower end and is fixed to the trailing arm, as shown at 242 in FIG. 2C; the other is located in the area of the trailing arm near the top end 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 the displacement detector of the longitudinal detection displacement detection device.
The displacement detector of the longitudinal detection displacement detection device faces the position calibration mechanism of the longitudinal detection displacement detection device, so that the position change condition of the position calibration mechanism of the longitudinal displacement detection device relative to the position change condition of the displacement detector of the longitudinal displacement detection device can be obtained, and displacement data can be generated and output. In some embodiments, one of the longitudinal sensing displacement sensing devices 241,242 is a displacement sensor and the other is a position calibration mechanism.
The cantilever crane can obtain the relative transverse displacement of the top arm and the longitudinal arm through longitudinal detection, further reduces the possibility of being shielded by a measured object in the using process, improves the reliability and robustness of transverse arm swing correction, and expands the application range.
In some embodiments, the multiple sets of displacement detection devices on the boom include a lateral displacement detection device, or a lateral displacement detection device and a longitudinal displacement detection device, and the components and the accuracy of the components may be the same or different, for example, some displacement detection devices are a laser emitting device and a laser detecting device, and some displacement detection devices are an image identifier and an image collecting device.
The arm support can give consideration to both accuracy and cost, different displacement detection devices are arranged at different positions according to requirements on precision and reaction speed, flexible selection can be achieved by combining application scenes, and controllability and adaptability are improved.
In some embodiments, the top arm of the arm support may be horizontally disposed as shown in fig. 2A to 2C, and in some embodiments, the top arm may achieve the effect of horizontal disposition by setting an included angle of 90 degrees with a vertical plane of the probe car when the probe car is connected. In other embodiments, as shown in fig. 3A to 3C, the top arm 301 of the arm support may be included within a first predetermined angle range, such as [ -45 °, +45 ° ] with the horizontal plane, where a negative angle refers to a case where the angle with the vertical plane of the probe car is less than 90, and a positive angle refers to a case where the angle with the vertical side vertical plane of the probe car is greater than 90. FIGS. 3A-3C show an angle of about + 10.
The arm support structure can provide a better displacement detection space and reduce the possibility that the displacement detection is blocked by a detected object. In some embodiments, the included angle between the top arm and the horizontal plane is greater than 0 degree, so that the range of the longitudinal arm for deploying the ray detector can be enlarged, the coverage of the arm support in radiation detection can be improved, and omission can be reduced.
In some embodiments, the trailing arm can be a straight arm as shown in FIGS. 2A-2C, or can be an arcuate arm 302 as shown in FIGS. 3A-3C. In some embodiments, the arc arm may protrude in the opposite direction of the probe vehicle, so as to expand the space between the probe vehicle and the trailing arm, which can accommodate the object to be tested, and expand the application range.
In some embodiments, as shown in fig. 3A, the position calibration mechanism and the displacement detection device may be located at (321, 322), wherein 321 is located at the upper position of the trailing arm, 322 is located at the upper position of the side wall of the detection vehicle, and 321 and 322 have the same height. 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 calibration mechanism and the displacement detection device may be located at (321, 312), wherein 321 is located at the upper position of the trailing arm, 312 is located at the position of the top arm near the probe car, and one of the position calibration mechanism and the displacement detection device is located at 321, and the other is located at 312.
In some embodiments, as shown in FIG. 3C, the position calibration mechanism and the displacement detection device may be located at (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 trailing arm 402 in FIGS. 4A-4C. The angle between the trailing arm 402 and the top arm 401 may be in a second predetermined range, for example, in the range of [90 °,135 ° ], thereby expanding the space between the probe car and the trailing arm that can accommodate the object to be tested and expanding the application range.
In some embodiments, as shown in fig. 4A, the position calibration mechanism and the displacement detection device may be located at (421, 422), wherein 421 is located at the upper position of the trailing arm, 422 is located at the upper position of the side wall of the detection vehicle, and 421 and 422 are equal 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 calibration mechanism and the displacement detection device may be located at (421, 412), wherein 421 is located at the upper position of the trailing arm, 412 is located at the position close to the detection vehicle on the top arm, and one of the position calibration mechanism and the displacement detection device is located at 421 and the other is located at 412.
In some embodiments, as shown in FIG. 4C, the position calibration mechanism and the displacement detection device may be located at (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 at 411 and the other is located at 431.
A schematic diagram of some embodiments of the mobile radiation detection apparatus of the present disclosure is shown in fig. 5. The arm support 52 may be any of those mentioned above. One end of the boom top arm is connected with the vehicle 51. The vehicle 51 can move the arm support through movement. In some embodiments, the vehicle 51 may be provided with one portion 54 of the security device and another portion of the security device on the trailing arm of the boom. The security inspection equipment includes: a radiation emitter and a radiation detector. The ray emitter is located in the area of the first end along the extending direction of the top arm of the arm support and can emit rays to the ray detector. The ray detector is located in the area of the second end of the extension direction of the top arm of the arm support and can receive rays from the ray 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 equipment can timely acquire the displacement deviation of the two ends of the arm support along the extension direction of the top wall, and 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 equipment is improved.
In some embodiments, a radiation detector may also be disposed on the top arm of the boom of the mobile radiation detection apparatus, and a radiation emitter may be disposed near the ground of the operation area of the boom, for example, to implement longitudinal detection on the object to be detected. 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, so as to enlarge the detection imaging range and reduce the radiation loss.
In some embodiments, the mobile radiation detection device further includes a processor, as shown in fig. 6, the processor 603 is in signal connection with the displacement detector 602 on the boom and the radiation detector 601 of the security inspection device respectively in a wired or wireless manner. The processor 603 can acquire displacement data output by the displacement detector of the boom, acquire radiation detection data output by the radiation detector, and correct the radiation detection data according to the displacement data.
In some embodiments, the security inspection device and the displacement detection device on the boom start detecting synchronously under the trigger of the same trigger. In some embodiments, the displacement detector may be triggered to acquire the detection data synchronously by a trigger signal for triggering the acquisition of the radiation detection data, and the acquisition frequencies of the radiation detector and the displacement detector are greater than a predetermined frequency, so as to improve the synchronism of the two data.
In some embodiments, the vibration amplitude and the vibration frequency of the boom may be detected or estimated. When 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 the synchronism of the arm swing displacement data and the radiation detection data is improved, a mode that a trigger signal for triggering the collection of the radiation detection data synchronously triggers a displacement detector to collect the detection data and the collection frequencies of the radiation detector and the displacement detector are larger than the preset frequency is adopted. Under the conditions 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 a preset vibration frequency threshold value, the requirement on the data synchronization degree is reduced, and the radiation detector and the displacement detector can be respectively acquired.
In some embodiments, in actual use, the synchronization degree of data acquisition can be selected according to the vibration frequency and the amplitude of the boom, so as to determine whether the operation of synchronously triggering the displacement detector and the radiation detector to acquire data needs to be performed by using the same trigger signal, thereby improving the adaptability to the environment.
In some embodiments, the processor 603 may pre-store the arm swing correction information including the association relationship between the correction parameter and the displacement data, determine the correction parameter to be used based on the information and the displacement data, correct the radiation detection data with the determined correction parameter, improve the timely obtaining of the correction parameter of the arm swing based on the arm swing displacement data obtained in the using 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 further 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 radiation detection data corrected in the case of an empty carriage. The processor 603 generates the arm swing correction information including the association relationship between the correction parameter and the displacement data, determines the associated correction parameter according to the arm swing correction information and the displacement data obtained in the detection process in the application process, and corrects the radiation detection data obtained in the detection process using the associated correction parameter. The empty carriage refers to a process that the area in the arm support does not comprise a vehicle or a box body, and the area moves under the driving of a detection vehicle (such as a vehicle 51) and detects air. In some embodiments, considering that the obtained correlation is discrete, a linear or non-linear relationship between the correction parameter of each detector pixel point and the arm displacement data can be obtained based on the discrete points, so as to ensure that the corresponding correction parameter can be matched during the use process.
The mobile radiation detection equipment can obtain the influence of the arm support on the radiation detection device and the displacement detector under the condition of no object blocking and the relevance of the influence on the radiation detection device and the displacement detector in a no-load carriage mode, so that arm swing correction information corresponding to the security inspection equipment one to one is generated, and the self-adaption degree and the accuracy of the arm swing correction equipment are improved.
In some embodiments, the present disclosure presents an acceptance system. The acceptance system comprises any one of the arm supports 71 mentioned above and a comparator 72 connected with a displacement detector on the arm support. The comparator 72 is capable of comparing the arm swing 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 track is lower than an acceptance standard; and if the arm swing displacement data are not larger than the preset arm swing displacement threshold, determining that the flatness of the ground or the track meets the acceptance standard.
The acceptance system can acquire the vibration condition of the arm support in the moving process, so that whether the flatness of the ground or the track causing the vibration can meet the requirement or not is determined, the phenomenon that radiation detection data are difficult to repair due to the fact that the ground or the track is too bumpy 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 swing includes a plurality of displacement detectors, a predetermined arm swing displacement threshold corresponding to each displacement detector may be set, and when any displacement data exceeds its corresponding predetermined arm swing displacement threshold, the arm swing is considered not to meet the acceptance criterion, thereby improving the accuracy of acceptance.
A flow chart of some embodiments of the security method of the present disclosure is shown in fig. 8.
In step 801, in the process of acquiring radiation detection data by any one of the mobile radiation detection devices mentioned above, displacement data output by a displacement detector on the boom is acquired. In some embodiments, in the case of multiple displacement detectors on the boom, the displacement data output by each displacement detector is acquired.
In step 802, correction parameters for the radiation detection data are determined from the displacement data. In some embodiments, the arm swing correction information may be pre-stored, the arm swing correction information includes an association relationship between the displacement data and the correction parameters, and the associated correction parameters are obtained through a matching query on the displacement data based on the arm swing correction information during the use process. In some embodiments, the arm swing correction information may be an association table of displacement data and correction parameters, or a relationship curve of displacement data and correction parameters.
In some embodiments, in the case that there are a plurality of displacement detectors, the arm swing correction information includes a corresponding relationship between an array formed by displacement data obtained by the plurality of displacement detectors and the correction parameter, so as to improve the accuracy of obtaining the radiation detection data correction parameter based on the arm swing correction information matching.
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, the displacement deviation of the arm support along the two ends of the extension direction of the top wall can be obtained in time in the radiation detection process, and then the radiation detection data is corrected by using the displacement 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 equipment of the same model does not have the same reaction to bumpy vibration, no-load walking can be performed on each arm support to obtain the arm swing correction information adaptive to the arm swing correction information. In some embodiments, the positions of the detectors during the empty carriage to generate the arm swing correction information are the same as those during actual application, thereby further ensuring the accuracy of the correction.
In some embodiments, the current mobile radiation detection device may be used as an empty carriage before being used for security detection. The method comprises the steps of obtaining correction parameters of radiation detection data through correction of a detection image, obtaining displacement data which is time-synchronous with the radiation detection data corrected under the condition of no-load traveling, and further generating arm swing correction information comprising the incidence relation of the correction parameters and the displacement data.
By the method, under the condition of no object blocking, the influence of the arm support on the radiation detection device and the displacement detector when the arm support vibrates and the relevance of the influence on the radiation detection device and the displacement detector can be obtained in a no-load carriage mode, so that arm pendulum correction information corresponding to the security inspection equipment one to one is generated, and the equipment self-adaption degree and accuracy of arm pendulum correction are improved.
In some embodiments, considering that the obtained correlation is discrete, a linear or non-linear relationship between the correction parameter of each detector pixel point and the arm displacement data can be obtained based on the discrete points, so as to ensure that the corresponding correction parameter can be matched during the use process.
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 triggered to acquire the detection data synchronously by triggering a trigger signal for acquiring the radiation detection data, and the acquisition frequencies of the radiation detector and the displacement detector are 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 times, the single-point detection data variation of each detector pixel point in the radiation detection data at each corresponding time is obtained; and measuring the median of multiple single-point detection data changes of the same detector pixel point at the moment of acquiring the same displacement data, determining the correction parameters of the corresponding detector pixel points, and further associating the correction parameters of each detector pixel point with the corresponding displacement data to acquire arm swing correction information. By the method, the influence caused by accidental factors can be reduced, and the accuracy of the arm swing correction information can be improved.
In some embodiments, if the processed radiation detection data is radiation imaging, the single-point detection data may be brightness P of a corresponding pixel point in the image, and the variation of the single-point detection data is a variation of the P value. The data correction is converted into image restoration in such a mode, and the method 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 device not only can be applied to traditional detection equipment such as combined type and vehicle-mounted type, but also can be applied to equipment such as ground walking self-adaptive scanning equipment (intelligent rail) with higher flexibility. The method can greatly improve the image quality, improve the spatial silk and spatial resolution and the dual-energy material identification of thin materials, and prevent the thin materials from being influenced by the environment (the flatness of the ground or a track, the rigidity of an arm support and the like). The method can also improve the environmental adaptability of the equipment, does not need to input excessive manpower and material resources into adjustment of ground/rail smoothness, control of scanning speed and stability, strict requirements on boom rigidity and the like, reduces cost and improves efficiency.
In some embodiments, during the use process, the detection result of the displacement detector is used alone, and the flatness of the ground or the rail can be checked. For example, comparing the displacement data to a predetermined arm swing displacement threshold; if the arm swing displacement data are larger than the preset arm swing displacement threshold, determining that the flatness of the ground or the track is lower than an acceptance standard; 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 criteria.
By the method, the phenomenon that the radiation detection data are difficult to repair due to the fact that the ground or the track is too bumpy can be avoided, the reliability of installation and configuration of the security inspection equipment is improved, and therefore 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. Some details well known in the art have not been described in order to avoid obscuring the concepts of the present disclosure. It will be fully apparent to those skilled in the art from the foregoing description how to practice the presently disclosed embodiments.
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, and firmware. The above-described order for the steps of the method is for illustration only, and the steps of the method of the present disclosure are not limited to the order specifically described above unless specifically stated otherwise. Further, in some embodiments, the present disclosure may also be embodied 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 examples are intended only to illustrate the technical solutions of the present disclosure and not to limit them; although the present disclosure has been described in detail with reference to preferred embodiments, those of ordinary skill in the art will understand that: modifications to the specific embodiments of the disclosure or equivalent substitutions for parts of the technical features may still be made; all such modifications are intended to be included within the scope of the claims of this disclosure without departing from the spirit thereof.
Claims (21)
1. An arm support comprising:
a top arm;
a trailing arm; and
a lateral-detection-displacement detecting device located in a region of a top end or a bottom end of an extending direction of the trailing arm, comprising:
the position calibration mechanism is positioned in the area of the first end along the extension direction of the top arm, is fixed on the top arm, the longitudinal arm or the side surface of the detection vehicle connected with the top arm, and faces the displacement detector of the transverse detection displacement detection equipment; and
the displacement detector is positioned in the area of a second end along the extension direction of the top arm, is fixed on the top arm, the longitudinal arm or the side surface of 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;
and the displacement calibration mechanism and the displacement detector are not fixed on the top arm at the same time.
2. The boom of claim 1, wherein,
the arm support comprises a plurality of groups of transverse detection displacement detection equipment; the mounting height of the lateral detection displacement detection device is different.
3. The boom of claim 2, wherein,
a first lateral detection displacement detection device is located in a region of a tip end in an extending direction of the trailing arm; and
the second lateral-detection-displacement detecting device is located in a region of a bottom end in an extending direction of the trailing arm.
4. The boom according to any one of claims 1 to 3, wherein the position calibration mechanism comprises a laser emitting device, and the displacement detector comprises a laser detecting device.
5. The boom of claim 4, wherein the laser emitting device comprises: a pen-shaped laser emitter or a laser dot matrix.
6. The boom according to any of claims 1-3, wherein the position calibration mechanism comprises an image marker and the displacement detector comprises an image acquisition device.
7. The boom according to any of claims 1-3, wherein the boom complies with at least one of the following:
the top arm is configured to be horizontally arranged in the using process 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 within a second preset angle range.
8. An arm support, comprising:
a top arm;
a trailing arm; and
longitudinal-detection displacement detection apparatus comprising:
one of the position calibration mechanism and the displacement detector is positioned on the area, close to the bottom end, of the trailing arm and is fixed on the trailing arm; the other area, which is positioned at the position close to the top end of the longitudinal arm, is fixed on the top arm;
said position calibration mechanism facing said displacement detector of said 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.
9. The boom of claim 8, further comprising:
lateral detection displacement detecting apparatus comprising:
the position calibration mechanism is positioned in the area of the first end of the top arm in the extension direction, 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
the displacement detector is positioned in the area of a second end along the extension direction of the top arm, is fixed on the top arm, the longitudinal arm or the side surface of 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;
and the displacement calibration mechanism and the displacement detector are not fixed on the top arm at the same time.
10. The boom according to claim 9, wherein the lateral detection displacement detection device is located at a top end or a bottom end region of an extending direction of the trailing arm.
11. The boom according to any of claims 8-10, wherein the boom complies with at least one of the following:
the top arm is configured to be horizontally arranged in the using process 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 within a second preset angle range.
12. A mobile radiation detection apparatus comprising:
the boom of any of claims 1 to 11;
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 device comprising:
the radiation emitter is positioned in the area of the first end of the extension direction of the top arm of the arm support and is configured to emit radiation to the radiation detector;
the radiation detector is positioned in the area of the second end of the extension 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.
13. The mobile radiation detection apparatus of claim 12, further comprising a processor configured to:
acquiring displacement data output by a displacement detector of the arm support;
acquiring radiation detection data output by the ray detector; and
correcting the radiation detection data according to the displacement data.
14. The mobile radiation detection device of claim 12, wherein the security device and the displacement detection device on the boom start detecting synchronously upon activation of the same trigger.
15. The mobile radiation detection apparatus of claim 13,
the processor is further configured to:
under the condition of no-load carriage, acquiring correction parameters of radiation detection data through correction of a detection image;
acquiring displacement data synchronous with radiation detection data corrected under the condition of no-load carriage;
generating arm swing correction information including an association relation between the correction parameters and the displacement data;
said correcting said radiation detection data from said displacement data comprises:
determining related correction parameters according to the arm swing correction information and displacement data acquired in the detection process;
radiation detection data acquired during the detection is corrected in accordance with the associated correction parameters.
16. An acceptance system comprising:
the boom of any of claims 1-11; and
a comparator configured to compare the arm swing displacement data with a predetermined arm swing displacement threshold; if the arm swing displacement data are larger than the preset arm swing displacement threshold, determining that the flatness of the ground or the track is lower than an acceptance standard; 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 criteria.
17. A security inspection method, comprising:
in the process of acquiring radiation detection data through the mobile radiation detection device of any one of claims 12 to 15, 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.
18. The security check method of claim 17, wherein said determining correction parameters for said radiation detection data from said displacement data comprises:
determining related correction parameters according to arm swing correction information and displacement data acquired in a detection process, wherein the arm swing correction information comprises the association relationship between the displacement data and the correction parameters;
radiation detection data acquired during the detection is corrected in accordance with the associated correction parameters.
19. The security inspection method of claim 18, further comprising:
using the current mobile radiation detection device empty carriage;
acquiring correction parameters of radiation detection data by correction of the detection image;
acquiring displacement data synchronous with radiation detection data corrected under the condition of no-load carriage;
and generating arm swing correction information including the association relationship between the correction parameters and the displacement data.
20. The security inspection method of claim 17, wherein in the process of acquiring the radiation detection data, acquiring the displacement data output by the displacement detector on the boom comprises:
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, a trigger signal for triggering the collection of radiation detection data synchronously triggers the displacement detector to collect the detection data, and the collection frequencies of the radiation detector and the displacement detector are larger than a preset frequency.
21. The security inspection method of claim 19, wherein the generating arm swing correction information including an association of correction parameters and displacement data comprises:
acquiring the variation of single-point detection data of each detector pixel point in the radiation detection data at the moment of acquiring the same displacement data;
measuring the median of multiple single-point detection data changes of the same detector pixel point at the moment of acquiring the same displacement data, and determining the correction parameters of the corresponding detector pixel point;
and associating the correction parameters of each detector pixel point with the corresponding displacement data to obtain the arm swing correction information.
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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 |
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| CN113252713B (en) | 2021-10-08 |
| PL441723A1 (en) | 2023-01-16 |
| CN113252713A (en) | 2021-08-13 |
| CN115616008B (en) | 2023-12-15 |
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