CN115753850A

CN115753850A - CT detection system, method and device

Info

Publication number: CN115753850A
Application number: CN202211520800.7A
Authority: CN
Inventors: 张玉爱; 丛鹏; 黄毅斌; 刘锡明; 王立强; 童建民; 张颜民
Original assignee: Tsinghua University
Current assignee: Tsinghua University
Priority date: 2022-11-30
Filing date: 2022-11-30
Publication date: 2023-03-07
Anticipated expiration: 2042-11-30
Also published as: CN115753850B

Abstract

The application discloses a CT detection system, a method and a device. The system comprises: the CT detection equipment is arranged in the detection chamber; the first conveying device is formed by extending the entrance of the detection chamber towards the CT detection device; the second conveying device is formed by extending the outlet of the detection chamber towards the CT detection device, and the first conveying device and the second conveying device are arranged at intervals at the part of the detection area; the control unit is connected with the first transmission device, the second transmission device and the CT detection device in a communication mode, and is used for: in the case that the detected object is detected to be placed on the first conveying device or the second conveying device and is in a region outside the detection region, controlling the first conveying device and the second conveying device to move at a first speed; and in the case of detecting that the detected object is in the detection area, controlling the first conveying device and the second conveying device to move at a second speed so that the detected object passes through the detection area at the second speed, wherein the second speed is less than the first speed.

Description

CT detection system, method and device

Technical Field

The present application relates to the field of CT technologies, and in particular, to a CT detection system, method, and apparatus.

Background

The Computed Tomography (CT) technique can clearly, accurately and intuitively display the internal structure, composition, material and defect condition of the detected object in the form of a two-dimensional tomographic image or a three-dimensional stereo image under the condition of no damage to the detected object, and is known as the best nondestructive testing and nondestructive evaluation technique at present. CT imaging technology is applicable in a variety of fields, such as medical (tissue and organ, physiological metabolic process imaging), industrial (quality inspection and flaw detection of various devices), and security (air containers, bags).

When the CT technology is used for online quality inspection in industrial production, the detection precision requirement of the online quality inspection is high, the spatial resolution of an image of a defect is generally required to be less than 1mm, the corresponding required detection speed is low, the detection time is long, and the quality detection quantity of a factory is large, so that the online quality inspection efficiency of the CT technology in the industrial production is low.

Disclosure of Invention

The embodiment of the application provides a CT detection system, a method and a device, which can drive a detected object in a variable speed manner, ensure the detection accuracy and improve the CT detection efficiency.

In a first aspect, an embodiment of the present application provides a CT detection system, including:

the CT detection equipment is arranged in the detection chamber;

the first conveying device is formed by extending the entrance of the detection chamber towards the CT detection device, and at least part of the first conveying device extends into the detection area of the CT detection device;

the second conveying device is formed by extending an outlet of the detection chamber towards the CT detection device, at least part of the second conveying device extends into a detection area of the CT detection device, and the first conveying device and the second conveying device are arranged at intervals at the part of the detection area;

a control unit, the control unit is in communication connection with the first transmission device, the second transmission device and the CT detection device, and is configured to:

controlling the first conveying device and the second conveying device to move at a first speed when the detected object is detected to be placed on the first conveying device or the second conveying device and is in a region outside the detection region;

and in the case of detecting that the detected object is in the detection area, controlling the first conveying device and the second conveying device to move at a second speed so that the detected object passes through the detection area at the second speed, wherein the second speed is less than the first speed.

In a second aspect, an embodiment of the present application provides a CT detection method, which is applied to the CT detection system as described above, and the method includes:

in the case that the detected object is detected to be placed on a first conveying device or a second conveying device and is in a region outside a detection region, controlling the first conveying device and the second conveying device to move at a first speed;

In a third aspect, an embodiment of the present application provides a CT detection apparatus, which is applied to the CT detection system as described above, and the apparatus includes:

the first control module is used for controlling the first conveying device and the second conveying device to move at a first speed when the detected object is detected to be placed on the first conveying device or the second conveying device and is positioned in a region outside a detection region;

and the second control module is used for controlling the first conveying device and the second conveying device to move at a second speed under the condition that the detected object is detected to be in the detection area, so that the detected object passes through the detection area at the second speed, and the second speed is smaller than the first speed.

In a fourth aspect, an embodiment of the present application provides an electronic device, including: a processor and a memory storing computer program instructions; the processor, when executing the computer program instructions, implements the CT detection method as described in any of the above.

In a fifth aspect, the present application provides a computer-readable storage medium, on which computer program instructions are stored, and when executed by a processor, the computer program instructions implement the CT detection method as described in any one of the above.

In a sixth aspect, the present application provides a computer program product, and when executed by a processor of an electronic device, the instructions of the computer program product cause the electronic device to perform the CT detection method as described in any one of the above.

In the CT detection system, the CT detection method, and the CT detection device of the embodiment of the application, in the process that the object to be detected is conveyed by the first conveying device or the second conveying device, the first conveying device and the second conveying device may be controlled to move at a first speed in the case of being in an area outside the detection area, and the first conveying device and the second conveying device may be controlled to move at a second speed in the case of detecting that the object to be detected is in the detection area, so that the object to be detected passes through the detection area at the second speed, where the second speed is smaller than the first speed. Therefore, the detected object is transmitted in a variable speed mode, the transmission speed of the detection area is lower than that outside the detection area, and the detected object passes through the detection area at a slower speed, so that the CT detection efficiency of a single detected object can be improved while the detection accuracy is ensured.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings needed to be used in the embodiments of the present application will be briefly described below, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.

FIG. 1 is a schematic structural diagram of a CT detection system provided in an embodiment of the present application;

FIG. 2 is a schematic flowchart of a CT detection method provided in an embodiment of the present application;

FIG. 3 is another schematic flow chart diagram of a CT detection method according to an embodiment of the present application;

FIG. 4 is a schematic structural diagram of a CT detection apparatus provided in an embodiment of the present application;

fig. 5 is a schematic structural diagram of an electronic device provided in an embodiment of the present application.

Detailed Description

Features and exemplary embodiments of various aspects of the present application will be described in detail below, and in order to make objects, technical solutions and advantages of the present application more apparent, the present application will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are intended to be illustrative only and are not intended to be limiting. It will be apparent to one skilled in the art that the present application may be practiced without some of these specific details. The following description of the embodiments is merely intended to provide a better understanding of the present application by illustrating examples thereof.

It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising … …" does not exclude the presence of another identical element in a process, method, article, or apparatus that comprises the element.

When the CT technology is used for online quality inspection in industrial production, the method has the following characteristics:

(1) A batch inspection mode of flow operation is required; (2) The ray energy and the intensity of a ray source used by the CT detection equipment are higher, so the CT detection equipment needs to be installed in a shielding detection room, the detected object conveying equipment is divided into an indoor part and an outdoor part, the radiation safety interlocking requirement in the detection process is higher, and the process control is more complicated; (3) The volume and the weight of an object to be detected are larger, so that the diameter of the CT detection equipment needs to be larger, but the detector signal of the CT detection equipment is weakened, and the mechanical rotational inertia is large, so that the diameter of the CT detection equipment is better reduced as much as possible; (4) The detection precision requirement is high, the spatial resolution of an image of a defect is generally required to be less than 1mm, the corresponding detection speed is required to be slow, the detection time is longer, and the quality detection quantity of a factory is large, so that the online quality detection efficiency of the CT technology in industrial production is low; (5) The detection object has various shapes and belongs to a precise part, and can not collide with the detection object in the transmission process. These characteristics bring difficulties in the on-line quality inspection by using the CT technology in industrial production.

In order to solve the problems of the prior art, embodiments of the present application provide a CT detection system, method and apparatus. First, a CT detection system provided in an embodiment of the present application will be described.

Fig. 1 shows a schematic structural diagram of a CT detection system according to an embodiment of the present application.

As shown in fig. 1, the CT detection system 100 may include: a first conveyor device 102, a second conveyor device 103, a CT detection device 105 and a control unit 122.

The CT detection device 105 is disposed within a detection chamber 106. The CT inspection apparatus 105 is equipped with a radiation source, a detector, and other components, and performs a rotational movement during inspection, and a CT rotation mechanism is commonly used.

The first conveyor 102 is formed by an entrance of the detection room extending towards the CT detection device 105, and at least a part of the first conveyor 102 extends into the detection area of the CT detection device 105.

The second transport device 103 is formed by an exit of the detection chamber extending towards the CT detection device 105, at least a part of the second transport device 103 extending into the detection area of the CT detection device 105.

The control unit 122 is connected to the first transmission device 102, the second transmission device 103 and the CT detection device 105 in a communication manner, and can be configured to: in the case where it is detected that the object 110 to be inspected is placed on the first conveying apparatus or the second conveying apparatus and is in an area outside the detection area, controlling the first conveying apparatus and the second conveying apparatus to move at a first speed; in the case where the object 110 to be inspected is detected to be in the detection area, the first conveying device and the second conveying device are controlled to move at the second speed so that the object 110 to be inspected passes through the detection area at the second speed, and the second speed is smaller than the first speed.

The control unit 122 may further be configured to: under the condition that the detected object reaches the detection area, controlling the CT detection equipment to open a ray shutter and start data acquisition; and under the condition that the detected object is detected to leave the detection area, controlling the CT detection equipment to stop data acquisition and close a ray shutter.

Specifically, the control unit may be a Programmable Logic Controller (PLC), or the like.

The detection chamber 106 may be, for example, a concrete-walled house that meets radiation protection requirements. In this embodiment, the length of the detection chamber 106 along the detection channel is 10 meters, but is not limited to this length, and may be set according to actual requirements.

The first conveying device 102 located in front of the CT detection device 105 and the second conveying device 103 located behind the CT detection device 105 in the detection room 106 can control the moving speed of the object 110 to be detected to be switched to a low detection speed (i.e., the second speed) when the object 110 enters the CT detection area, and can control the detection speed to be switched to a conveying speed (i.e., the first speed) when the object 110 is out of the CT detection area, so that the object 110 to be detected can be rapidly moved out of the detection area. Illustratively, the first speed may be 3m/min and the second speed may be 60mm/min. In this embodiment, the first speed and the second speed are not limited to the above values, and the user may set the first speed and the second speed according to actual requirements, which is not specifically limited herein.

In addition, the first conveying device 102 and the second conveying device 103 are arranged at intervals in the detection area, so that the detection field of the CT detection device 105 does not contain a conveying device, which not only can avoid the interference of the conveying device on the CT image acquisition and improve the quality of the CT image, but also can reduce the diameter of the CT detection device 105, thereby increasing the detector signal, reducing the rotational inertia of the CT detection device 105 and prolonging the service life of the machine.

In some embodiments, the CT detection system 100 may further include: an entrance shielding window 107 outside the entrance of the detection chamber and an exit shielding window 108 outside the exit, an entrance conveyor 101 outside the entrance window 107, an exit conveyor 104 outside the exit window 108, a tray 109 for holding an object 110 to be detected, a detection process start button 111, an entrance detection chamber sensor 112, a deceleration sensor 113, an entrance detection passage sensor 114, an exit detection passage sensor 115, an exit window collision avoidance sensor 116, an exit detection chamber sensor 117, an arrival end point sensor 118, a judgment object removal sensor 119, a height limit sensor 120, and a width limit sensor 121. The control unit is communicatively connected to the entrance shield window 107, the exit shield window 108, the third transfer device 101 and the fourth transfer device 104, the inspection flow start button 111, and the respective sensors 112-121.

Specifically, the entrance shielding window 107 is disposed at the entrance of the detection chamber 106, the exit shielding window 108 is disposed at the exit of the detection chamber 106, and the entrance shielding window 107 and the exit shielding window 108 can be opened or closed.

The control unit 122 may be further configured to: when the detected object 110 is detected to reach the preset position of the first conveying device, the entrance shielding window 107 is controlled to be closed;

in the case where it is detected that the object 110 to be inspected leaves the detection area (i.e., when the first preset position of the second conveying apparatus is reached), the entrance shield window 107 and the exit shield window 108 are controlled to be opened; when the detected object 110 reaches the preset position of the fourth conveying device, controlling the outlet shielding window 108 to be closed; in the case where it is detected that the object to be examined 110 enters the detection region and it is detected that both the entrance shield window 107 and the exit shield window 108 are closed, the CT detection apparatus 105 is controlled to open the radiation shutter and data acquisition.

Illustratively, the detection chamber 106 is windowed on the walls at both ends in the direction of the detection passage, so that the object 110 to be detected enters the detection chamber from one window (entrance shield window 107) and leaves the detection chamber 106 from the other window (exit shield window 108). The entrance shielding window 107 and the exit shielding window 108 may be translational ray shielding windows with anti-pinch function, and can be controlled to open or close during the inspection process, and the on-off state of the windows can be read. Alternatively, the entrance shielding window 107 and the exit shielding window 108 may also be two electrically controlled sliding doors with a ray shielding function, and a door magnetic induction switch is provided to determine the opening and closing states of the doors. The closing of the entrance shield window 107 and the exit shield window 108 may be detected by a magnetic door sensor switch of the entrance shield window 107 and the exit shield window 108.

And an entrance detection chamber sensor 112 installed inside the entrance shielding window 107 in the detection chamber 106, and when detecting that the rear end of the tray 109 reaches the sensor position, indicating that the tray 109 has completely entered the chamber, triggering to close the entrance shielding window 107 and simultaneously triggering to stop the third transfer apparatus 101. In this embodiment, a photoelectric sensor may be used.

And a deceleration sensor 113 installed in front of the CT detection path, which switches the moving speeds of the first and second conveying

devices

102 and 103 to a low detection speed and opens the radiation shutter when detecting that the front end of the object 110 reaches the position. In this embodiment, the object 110 to be inspected has an irregular shape, and therefore, a light curtain sensor may be used to trigger the object from the front end.

The entrance detection path sensor 114 is installed at a position where the ray detection starts, and when the front end of the object to be detected 110 reaches this position and the first conveying device 102 and the second conveying device 103 have stably operated at the detection speed, a signal of "start data acquisition" is sent to the CT detection device 105. In this embodiment, a light curtain sensor may be used, triggered by the front end of the object.

And a departure detection passage sensor 115 installed at an exit position of the radiation detection passage for determining whether the rear end of the object 110 has departed from the radiation detection passage. In this embodiment, a light curtain sensor is used to trigger the rear end of the object 110 to be detected.

The exit detection chamber sensor 117 is installed outside the exit shield window 108, and triggers the exit shield window 108 to be closed when the arrival of the rear end of the tray is detected. In this embodiment, a photoelectric sensor is used, and the rear end of the tray is triggered.

In the embodiment of the present application, the deceleration sensor 113 and the entrance detection channel sensor 114 may be used to detect that the object 110 is placed in the detection area; the condition that the object 110 to be inspected is placed in the first conveying apparatus 102 or the second conveying apparatus 103 and is in an area outside the inspection area can be detected by the entrance detection chamber sensor 112 and the exit detection passage sensor 115. Whether the object 110 to be detected reaches a preset position of the first conveying device 102 may be detected by the entrance detection chamber sensor 112; whether the object 110 to be inspected reaches the first preset position of the second conveying device 103 or not can be detected by the departure detection channel sensor 115; whether the object 110 to be inspected reaches the first preset position of the fourth conveying apparatus may be detected by the exit detection chamber sensor 117.

The exit shield window collision avoidance sensor 116 is installed in the detection chamber 106 at a position in front of the exit shield window 108, and is capable of reading the open/close state of the exit shield window 108 when the front end of the object 110 reaches the position, and in this embodiment, the exit shield window collision avoidance sensor is triggered by the front end of the tray containing the object 110.

In some embodiments, the system may further include: a first alarm (not shown).

The first alarm may be disposed at an outlet of the detection chamber 106. For example, mounted on the outlet wall, the first alarm may be a voice alarm horn.

The control unit 122 is connected to the first alarm, and may be configured to: when the detected object reaches the second preset position of the second conveying device 103 and the exit shielding window 108 is detected not to be opened completely, the first conveying device 102 and the second conveying device 103 are controlled to stop moving, and the first alarm is controlled to give an alarm.

In the embodiment of the present application, whether the detected object 110 reaches the second preset position of the second conveying device 103 may be detected by the exit shield window anti-collision sensor 116, the switch state may be detected by the door magnetic sensor of the exit shield window 108, and when it is found that the exit shield window 108 is not opened in place, the second conveying device 103 is controlled to stop moving, and an alarm is given to prompt a user, so as to prevent the detected object 110 from colliding with the exit shield window 108, and avoid the detected object 110 from colliding and being damaged.

One end of the third transfer device 101 is provided at the entrance of the detection chamber 106, and the other end extends in a direction away from the entrance of the detection chamber 106.

One end of the fourth conveying device 102 is disposed at the outlet of the detection chamber 106, and the other end extends away from the outlet of the detection chamber 106.

The control unit may be further configured to: in a case where it is detected that the object 110 to be inspected is placed on the third conveying apparatus 101 and the entrance shield window 107 is opened, controlling the third conveying apparatus 101 to move at the first speed; in a case where it is detected that the test object 110 is placed on the fourth conveying apparatus 104, the fourth conveying apparatus 104 is controlled to move at the first speed.

Controlling the third conveying device 101 to stop moving when the detected object 110 is detected to reach the preset position of the first conveying device 102; upon detecting that the object 110 to be inspected reaches a second preset position of the fourth conveying apparatus 104 described below, the fourth conveying apparatus 104 is controlled to stop moving.

Specifically, the third conveying device 101 is a conveying device at the entrance of the detection chamber, and can convey the object 110 to be detected from the home position into the detection chamber 106, and the conveying speed can be set as needed. Illustratively, in the embodiment, a roller way conveying mode is adopted, the length is about 3m, and the conveying speed is set to be 3m/min. The fourth conveying device 104, which is a conveying device at the exit of the detection chamber, can convey the object 110 to be inspected to the outside of the chamber, and its size specification can be the same as that of the third conveying device 101.

In the embodiment of the application, the third conveying device 101 and the fourth conveying device 104 are used for conveying the detected object, so that the article conveying efficiency can be improved, and the labor cost can be reduced.

The above system may further comprise: a second alarm (not shown), a height limit sensor 120 and a width limit sensor 121.

The second alarm is arranged at the inlet of the detection chamber. For example, an automatic voice alarm speaker is mounted on the entrance outer wall.

The height limit sensor 120 is disposed at an entrance of the detection chamber 106, and is used for acquiring height information of the object 110. Illustratively, in the present embodiment, a pair of horizontal opposed photosensors is employed.

The width limiting sensor 121 is disposed at an entrance of the detection chamber 106, and is configured to acquire width information of the object 110. In the present embodiment, a pair of top-bottom opposite photoelectric sensors are mounted on both sides of the conveying channel.

The control unit 122 may further be configured to: and in the case of detecting that the height information and/or the width information of the detected object 110 do not meet the preset conditions, controlling the third conveying equipment 101 to stop moving and controlling the second alarm to alarm.

In the embodiment of the application, the damage caused by collision due to the fact that the size of the detected object is not matched with the size of the entrance shielding window 107 or the CT detection equipment 105 can be avoided, the detection flow is stopped in time, and a user is reminded to remove the detected object with the improper size.

The above system may further include: a third alarm (not shown).

The third alarm is disposed at an outlet of the detection chamber 106. For example, the third alarm is located near an end of the fourth delivery device 104 remote from the outlet. In some embodiments, since the first alarm is also disposed at the outlet of the detection chamber 106, the third alarm may also share a voice alarm speaker with the first alarm, thereby saving equipment costs.

The control unit 122 is connected to the third alarm in communication, and may be configured to: and controlling a third alarm to alarm in the case of detecting that the detected object 110 reaches the second preset position of the fourth conveying device 104.

The second preset position of the fourth transferring device 104 may be a position which is set by a user according to actual needs and can be monitored by a sensor.

In the embodiment of the present application, whether the detected object 110 reaches the second preset position of the fourth conveying device 104 may be detected by reaching the end point sensor or the object removal determining sensor, and an alarm may be issued when the detected object 110 reaches the second preset position, so as to prompt the user to remove the detected object 110 in time.

An arrival end sensor 118 is installed at the end of the exit conveyor (fourth conveyor 104) for detecting the arrival of the front end of the tray. In this embodiment, a limit switch is used to stop the movement of the exit conveyor (fourth conveyor 104) when triggered.

A judgment object removal sensor 119 for judging whether the object 110 to be inspected and the tray 109 on the exit conveyor (fourth conveying device 104) are removed or not, so as to avoid affecting the arrival of the next object 110 to be inspected. In this embodiment, a photoelectric sensor is used.

In some embodiments, the length of the first conveyor apparatus 102 is greater than the length of the second conveyor apparatus 103.

For example, the conveying length of the first conveying device 102 may be 6m, and the conveying length of the second conveying device 103 may be 5m, so that it is ensured that the distance from the starting position to the deceleration sensor 113 for the object 110 to be detected is longer than the distance traveled by the object after leaving the detection passage to the detection chamber sensor 117, by 1m, thereby ensuring that when the radiation shutter is opened in the inspection process of the next object 110 to be detected, the previous object 110 to be detected and the tray have been moved out of the room and the rear window is closed. In this embodiment, the conveying length of the first conveying device 102 and the conveying length of the second conveying device are not limited to the above values, as long as the length of the first conveying device is greater than the length of the second conveying device, and this is not particularly limited.

In the embodiment of the application, the length of the first conveying device in the detection chamber is set to be longer than that of the second conveying device, so that the time taken for the next detected object to reach the ray shutter opening position from the initial position of the first conveying device is longer than the time taken for the previous detected object to leave the detection chamber from leaving the CT ray detection channel, namely, when the next object reaches the shutter opening position before the CT detection mechanism, the previous object leaves the detection chamber and closes the exit window, the condition that the exit shielding window is closed when the ray shutter is opened in the next detection process is met, the condition that the ray inspection is started just when the previous object leaves the detection chamber is met, and the time interval for inspecting the two adjacent detected objects is shortened to the maximum extent.

The tray 109 may include at least one specification for accommodating the object 110 to be inspected. Illustratively, the tray 109 is made of carbon fiber, and the tray has small density and high strength, so that the attenuation of rays can be reduced; rectangular trays with a width of 680mm and a length of 2.3m or 1m are designed according to the size of the object 110 to be detected. In this embodiment, the specification of the tray is not limited to this, and different specifications may be set according to the actual needs of the user, which is not specifically limited herein.

In the embodiment of the application, the tray is used for containing the detected objects with different shapes, so that the detected objects can be safely conveyed on the conveying mechanism, and the tray has at least one size specification and can also meet the requirement of containing the detected objects with various specifications.

The start button 111 may start an inspection process of the object 110. In this embodiment, it is a jog push button switch.

The CT detection system comprises high-precision CT detection equipment, the detected object is required to pass through at a low speed during detection, and the CT detection system greatly shortens the total detection time and improves the detection efficiency of a factory by designing a compact flow type detection flow under the condition of not compressing necessary CT ray detection time, namely not reducing the image quality.

The CT mechanical structure with large weight and large inertia is prevented from being started and stopped frequently under the condition of long-time continuous inspection through the flow design that the motion of the CT rotating mechanism is not stopped between two adjacent detected objects, and the service life of the CT mechanical equipment is prolonged.

The two sides of the CT ray detection visual field are respectively provided with the conveying devices, so that the detection visual field does not contain the conveying devices except the detected object and the tray, the diameter of the CT rotating mechanism is favorably reduced, the signal of the detector is increased, the rotational inertia of the rotating mechanism is reduced, and the quality of the CT image and the mechanical life are improved.

Through the interlocking of the positions of the detected objects, the ray shutters and the inlet and outlet shielding windows, the seamless connection of the inspection processes of two adjacent detected objects is ensured, the inspection efficiency is improved, and the radiation safety interlocking is also ensured.

The design of the inspection flow can be used for dealing with various accidents, and the protection of the precision inspected object and equipment under various accidents is ensured.

Based on the CT detection system provided in the above embodiment, correspondingly, the embodiment of the present application further provides a CT detection method, which is explained herein.

Please refer to fig. 2, which is a flowchart illustrating a CT detection method according to an embodiment of the present disclosure. The CT detection method is applied to the CT detection system, and as shown in fig. 2, the CT detection method may include the following steps S201 to S202.

S201, in the case that the detected object is placed in the first conveying device or the second conveying device and is in a region outside the detection region, controlling the first conveying device and the second conveying device to move at a first speed.

And S202, under the condition that the detected object is detected to be in the detection area, controlling the first conveying device and the second conveying device to move at the second speed so that the detected object passes through the detection area at the second speed.

In the embodiment of the application, in the process of conveying the detected object by the first conveying device or the second conveying device, in the case of being in the area outside the detection area, the first conveying device and the second conveying device can be controlled to move at the first speed, and in the case of detecting that the detected object is in the detection area, the first conveying device and the second conveying device can be controlled to move at the second speed so that the detected object passes through the detection area at the second speed, wherein the second speed is smaller than the first speed. Therefore, the detected object is transmitted in a variable speed mode, the transmission speed of the detection area is lower than that outside the detection area, the detected object passes through the detection area at a slower speed, and the CT detection efficiency can be improved while the detection accuracy is ensured.

In S201, whether the object is placed in the first conveying device or the second conveying device and is outside the detection area can be detected by the entrance detection chamber sensor and the exit detection path sensor.

In S202, the detected object placed in the detection area can be detected by the deceleration sensor and the entrance detection path sensor.

The second speed is lower than the first speed, and for example, when the object to be detected enters the CT detection area, the moving speed of the object to be detected can be controlled to be switched to a low-speed detection speed (i.e., the second speed) so as to ensure the detection quality, and when the object to be detected leaves the CT detection area, the detection speed can be controlled to be switched to a conveying speed (i.e., the first speed) so as to quickly move the object to be detected out of the detection area, thereby improving the detection efficiency.

In some embodiments, the method may further include:

under the condition that the detected object is placed in the detection area, controlling an inlet shielding window and an outlet shielding window to be closed, wherein the inlet shielding window is arranged at the inlet of the detection chamber, and the outlet shielding window is arranged at the outlet of the detection chamber;

and controlling the CT detection equipment to open the ray shutter under the condition that the entrance shielding window and the exit shielding window are detected to be closed.

In some embodiments, after the controlling the CT detection device to open the radiation shutter, the method may further include:

and under the condition that the detected object reaches the preset position of the second conveying device and the ray shutter of the CT detection device is closed, controlling the opening of the outlet shielding window.

It should be noted that the opening and closing of the shielding windows at the entrance and exit can be controlled by determining the positions of the tray and the object, the entrance window is closed by determining that the tray completely enters the detection chamber, the exit window is closed by determining that the tray completely leaves the detection chamber, and the entrance and exit windows are opened by determining that the object to be detected leaves the CT-ray detection channel.

In the embodiment of the application, the radiation safety interlocking is realized by setting the state interlocking of the ray shutter and the entrance and exit shielding windows, wherein the ray shutter of the CT detection device is opened under the condition that the detected object enters the detection area and the entrance shielding window and the exit shielding window are both closed, and the exit shielding window is opened under the condition that the detected object passes through the detection area and the ray shutter of the CT detection device is closed.

In some embodiments, the method may further include:

and in the case of detecting that the detected object is placed on a third conveying device or a fourth conveying device, controlling the third conveying device and the fourth conveying device to move at a first speed, wherein one end of the third conveying device is arranged at the inlet of the detection chamber, the other end of the third conveying device extends towards the direction far away from the inlet of the detection chamber, one end of the fourth conveying device is arranged at the outlet of the detection chamber, and the other end of the fourth conveying device extends towards the direction far away from the outlet of the detection chamber.

In the embodiment of the application, the third conveying device and the fourth conveying device are used for conveying the detected object, so that the article conveying efficiency can be improved, and the labor cost can be reduced.

In some embodiments, after the controlling the opening of the exit shielding window, the method may further include:

and under the condition that the shielding window of the outlet cannot be completely opened, controlling the first conveying equipment and the second conveying equipment to stop moving and controlling a first alarm to give an alarm, wherein the first alarm is arranged at the outlet of the detection chamber.

In some embodiments, after the controlling the third and fourth transfer devices to move at the first speed, the method may further include:

acquiring height information and width information of a detected object;

and under the condition that the detected height information and/or width information of the detected object do not meet the preset conditions, controlling the third conveying equipment to stop moving, and controlling a second alarm to give an alarm, wherein the second alarm is arranged at the inlet of the detection chamber.

and under the condition that the detected object reaches the preset position of the fourth conveying equipment, controlling a third alarm to alarm, wherein the third alarm is arranged close to one end, far away from the outlet, of the fourth conveying equipment.

In the embodiment of the application, through setting up the door magnetic switch that has or not object judgement sensor and interpretation on entrance limit for height width sensor, export window anticollision sensor and the export conveyer, when guaranteeing that the unexpected condition takes place, in time terminate the automatic check-up flow to the maintenance of reporting to the police avoids being examined the object and taking place to collide with the damage.

In order to facilitate understanding of the CT detection method in the embodiment of the present application, a practical application process of the CT detection method is described, as shown in fig. 3, specifically as follows:

s301, power-on preparation, and initialization work is well done at the beginning of the inspection process.

S302, starting a CT detection mechanism (CT detection equipment) to rotate, opening an entrance window (entrance shielding window), and closing an exit window (exit shielding window).

S303, the user places the tray on the entrance conveyor (third conveying device), and prepares the object to be inspected in the tray.

S304, the user presses the starting button of the inspection process, and the system enters the automatic inspection process.

S305, judging whether the entrance window is in an open-to-position state or not by the control unit according to a door magnetic switch of the entrance window (entrance shielding window); if yes, go to step S306; if not, continuing to judge and waiting until the state is on.

S306, starting the entrance conveying device, and detecting synchronous high-speed movement (such as 3 m/min) of the conveying devices (the first conveying equipment and the second conveying equipment) on the two sides of the indoor CT detection mechanism.

S307, when the detected object reaches the positions of the height limiting sensor and the width limiting sensor, judging whether the detected object is ultrahigh and ultra-wide; if not, the detected object and the tray are conveyed into the detection chamber together; if yes, go to step S326.

S308, judging whether the 'sensor entering the room' is triggered by the rear end of the tray; if yes, go to step S309; if not, continuing to judge.

S309, indicating that the tray completely enters the room, closing the entrance window, stopping the entrance conveying device, and prompting the user to prepare the next detected object on the entrance conveying device through sound alarm (in order to make the connection between two adjacent detected objects more compact, the detected object is placed and prepared at the moment).

S310, judging whether the deceleration sensor is triggered by the front end of the detected object or not along with the forward movement of the current detected object along the conveying device (first conveying equipment); if yes, jumping to S311; otherwise, continuing to judge.

S311, judging whether the entrance window and the exit window are completely closed; if yes, go to step S312, otherwise go to step S326.

S312, the movement speed of the indoor conveying device (the first conveying device and the second conveying device) is switched to a detection speed (such as 60 mm/min), the ray shutter is opened, and the opening of the entrance window and the exit window is forbidden during the opening of the shutter.

S313, judging whether the front end of the detected object reaches the detection channel and triggering the 'entering detection channel sensor'; if yes, jumping to step S314; otherwise, continuing to judge.

And S314, starting CT to start image data acquisition.

S315, with the tray and the detected object moving forward, judging whether the rear end of the detected object triggers a sensor leaving the detection channel; if yes, go to step S316, otherwise continue to judge.

S316, indicating that the CT finishes detecting the object, stopping CT image data acquisition, closing a ray shutter, opening an entrance window, simultaneously opening an exit window to prepare for the current detected object to leave the detection chamber, and switching the indoor conveying device to a high speed (such as 3 m/min); the user can be prompted by a sound alarm to press an inspection process starting button to start the next inspection process.

S317, judging whether an object which is not moved exists on the outlet conveying device according to the judgment object moving sensor; if the situation is abnormal, the user is prompted to move the object immediately by sound alarm; if not, go to step S318.

S318, judging whether the front end of the tray triggers an exit window anti-collision sensor; if yes, jumping to step S319; if not, continuing to judge.

S319, the control unit judges whether the exit window is in an open-to-position state through the exit window door magnetic switch; if not, go to step S326; if yes, go to step S320.

S320, judging whether an object which is not moved away exists on the outlet conveying device or not; if not, indicating that no object exists, skipping to step S321; otherwise, go to step S326.

And S321, starting the outlet conveying device to move.

S322, judging whether the rear end of the tray triggers a sensor leaving the detection chamber; if yes, jumping to step S323; if not, continuing to judge.

And S323, closing the outlet window.

S324, judging whether the front end of the tray collides with an 'arrival end sensor'; if yes, jumping to step S325; otherwise, continuing to judge.

And S325, stopping the movement of the outlet conveying device, giving an alarm to prompt the removal of the tray and the detected object until the object is detected to leave by the judgment object removal sensor, and ending the inspection process of the current detected object.

S326, checking the abnormal termination of the flow, and alarming to prompt to process the corresponding abnormal condition.

In this embodiment, the first conveying device before the CT detection mechanism is longer than the second conveying device after the CT detection mechanism by 1m, so as to ensure that the distance from the starting position to the deceleration sensor is longer than the distance traveled when the object leaves the detection channel and reaches the "leave detection chamber sensor" by 1m, thereby ensuring that when the shutter is opened in the next inspection flow, the previous object and tray have already moved out of the room and the closing of the rear window is completed.

For the practical application process of the CT detection method shown in fig. 3, the control unit receives signals of each device and executes the following corresponding operation strategies:

(1) Preparing, starting a CT rotating mechanism in a ray shielding detection room, opening a shielding window at an inlet of a detected object in the shielding detection room, and closing an outlet shielding window;

(2) Preparing a detected object, and placing the detected object in a tray on a detection chamber inlet conveying device by a worker;

(3) A worker presses down an inspection starting button to enter an automatic inspection flow;

(4) The control unit judges whether the entrance shielding window is opened or not according to the door magnetic switch of the entrance window;

(4.1) if not, continuing to interpret;

(4.2) if yes, starting a conveying device at the inlet of the detection chamber and conveying devices at two sides of a CT detection mechanism in the detection chamber to move at the same speed, and conveying the tray and the detected object forward;

(5) The control unit judges whether the object is ultrahigh and ultrawide according to a height limit sensor and a width limit sensor which are arranged at the inlet;

(5.1) if the height is over-high or over-wide, terminating the automatic inspection process and giving an alarm for prompting;

(5.2) if not, executing the next step;

(6) The control unit judges whether the tray completely enters the detection chamber through a sensor arranged in the detection chamber and close to the entrance shielding window

(6.1) if not, continuing to interpret until the tray completely enters the room;

(6.2) if yes, closing the entrance window, stopping the movement of the detection chamber entrance conveying device, giving an alarm to prompt a worker to perform the step (2) to prepare the next detected object, and simultaneously performing the step (7);

(7) The control unit judges whether the detected object arrives or not through a sensor arranged in front of the CT detection mechanism in the detection chamber;

(7.1) if not, continuing to interpret until the result is reached;

(7.2) if yes, executing the next step;

(8) The control unit judges whether the access windows are all in a closed state through the door magnetic switch;

(8.1) if any one of the inlet window and the outlet window is in an open state, the shielding window has a closing fault and does not accord with the condition of opening the ray shutter, the automatic inspection process is terminated, and an alarm is given to prompt the maintenance fault;

(8.2) if yes, opening a ray shutter, forbidding opening of an entrance window during the shutter opening period, and synchronously switching the movement speeds of two conveying devices on two sides of the CT detection mechanism to a low detection speed;

(9) The control unit judges whether the front end of the detected object reaches the ray detection channel through a sensor arranged in front of the ray beam of the CT detection mechanism;

(9.1) if not, continuing to interpret until the front end of the detected object arrives;

(9.2) if yes, starting CT image data acquisition;

(10) The control unit judges whether the rear end of the detected object leaves the ray detection channel or not through a sensor arranged behind the ray beam of the CT detection mechanism;

(10.1) if not, continuing to interpret until the rear end of the detected object leaves;

(10.2) if yes, executing the following steps;

(10.2.1) stopping CT image data acquisition;

(10.2.2) closing the radiation shutter;

(10.2.3) opening the entrance and exit shielding window;

(10.2.4) switching the two conveyors before and after CT to high speed;

(10.2.5) alarming and prompting the staff to execute the step (3) and starting the next automatic inspection process;

(11) The control unit judges whether an object exists on the outlet conveying device according to a sensor on the outlet conveying device;

(11.1) if yes, giving a sound alarm to prompt a worker to remove the object;

(11.2) if not, executing the next step;

(12) The control unit judges whether the tray reaches the position or not through a sensor arranged on the inner side of the outlet of the detection chamber;

(12.1) if not, continuing to interpret until the tray arrives;

(12.2) if yes, executing the next step;

(13) The control unit judges whether the exit window is opened or not according to the exit window magnetic sensor;

(13.1) if not, the opening fault of the exit window occurs, in order to avoid the object from colliding with the exit window, the automatic inspection flow is stopped, and the alarm prompts the fault maintenance;

(13.2) if yes, executing the next step;

(14) The control unit judges whether an object exists on the outlet conveying device or not according to the sensor on the outlet conveying device;

(14.1) if yes, terminating the automatic inspection process, and giving an alarm to prompt a worker to remove the object;

(14.2) if not, starting the outlet conveying device to move;

(15) The control unit judges whether the tray leaves the detection chamber or not through a sensor which is arranged outside the outlet of the detection chamber and is close to the outlet window;

(15.1) if not, continuing to interpret until the tray leaves;

(15.2) if yes, closing the exit window;

(16) The control unit judges whether the tray reaches the end point or not through a sensor arranged at the end point of the detection chamber outlet conveying device;

(16.1) if not, continuing to interpret until the pallet arrives;

and (16.2) if yes, stopping the movement of the outlet conveying device, and simultaneously giving an alarm to prompt a worker to remove the tray and the detected object until the object is detected to leave.

In the above steps, step 9 and step 10 may be performed by using the sensor of step 7, that is, the sensor used in step 7 is triggered by the front end of the object, and then step 9 is performed with a delay of a certain time in accordance with the conveyance speed, and step 10 is performed with a delay of a certain time after being triggered by the rear end of the object.

The detected object conveying device is divided into four sections, and the outgoing port and the incoming port of the detection room are respectively provided with one conveying device which is respectively a motion starting section and a motion ending section of the detected object, so that the conveying speed is high; the width of the ray beam at two sides of the CT detection mechanism in the detection chamber is respectively provided with a section of conveying device, the conveying speed of the two sections of conveying devices is controlled to be low speed when the object to be detected passes through the detection channel CT detection in the detection process, and the other time is controlled to be high speed, so that the time of the detection process is shortened. In addition, the two conveying devices in the room are segmented at the ray bundle, and the interference of the conveying devices on the image is avoided. And by controlling the connection time of the detection flows of the two detected objects before and after, the radiation safety is ensured, and simultaneously, the time interval of the detection of the two adjacent detected objects is shortened to the maximum extent, under the condition that a large number of detected objects exist, the total detection time is greatly shortened, and the detection efficiency of a factory is improved.

According to the requirement that a CT detection mechanism is arranged at one end of a detection chamber (a side wall is close to one end and provided with a gate) due to radiation protection, the length of a conveying device at the CT inlet side in the detection chamber is designed to be longer than the certain length of a conveying device at the CT outlet side in the detection chamber, so that the time taken by a next detected object to reach the ray shutter opening position from the initial position of the inlet conveying device is longer than the time taken by a previous detected object to leave a CT ray detection channel and leave the detection chamber, namely, when the next object reaches the shutter opening position before the CT detection mechanism, the previous object leaves the detection chamber and closes an outlet window, the condition that the outlet shielding window is closed when the shutter is opened in the next detection process is met, the condition that the ray detection is started just before the previous object leaves the detection chamber is met, and the time interval for detecting two adjacent detected objects is shortened to the maximum extent.

The tray is used for containing the detected objects with different shapes to ensure that the detected objects are safely conveyed on the conveying mechanism, and the sensors are used for judging that the detected objects but the tray pass through the ray detection channel, so that the effective length of ray detection is the length of the detected objects but not the length of the tray, and the CT detection time can be greatly shortened under the condition of low detection speed.

The operator may prepare the inspected object on the entrance conveyor while the entrance window is closed, and may prepare to remove the inspected object on the exit conveyor while the exit window is closed. The two working links are parallel to the detection of the indoor object, and the time of an automatic detection process is not occupied.

Through setting up the width limit sensor of entrance limit for height, export window anticollision sensor and export conveyer on have or not the object to judge the sensor and interpret the door magnetic switch on the access & exit shielding window, when guaranteeing that the unexpected condition takes place, in time terminate the automatic check-up flow to the maintenance of reporting to the police avoids being examined the object and takes place to collide with the damage.

The radiation safety interlock is realized by arranging the ray shutter and the entrance and exit shielding window in a state interlock manner.

The opening and closing of the shielding windows at the entrance and the exit are controlled by judging the positions of the tray and the object, the entrance window is closed by judging that the tray completely enters the detection chamber, the exit window is closed by judging that the tray completely leaves the detection chamber, and the entrance and the exit windows are opened by judging that the detected object leaves the CT ray detection channel.

The following describes a schematic structural diagram of a CT detection apparatus according to an embodiment of the present application in detail with reference to the accompanying drawings.

Fig. 4 is a schematic structural diagram of a CT detection apparatus according to an embodiment of the present disclosure. As shown in fig. 4, the CT detection apparatus 400 may include the following modules:

a first control module 401 configured to control the first conveying apparatus and the second conveying apparatus to move at a first speed in a case where it is detected that the object to be detected is placed on the first conveying apparatus or the second conveying apparatus and is in a region outside the detection region;

and a second control module 402, configured to, in a case where the detected object is detected to be in the detection area, control the first conveying device and the second conveying device to move at a second speed, so that the detected object passes through the detection area at the second speed, where the second speed is smaller than the first speed.

In the embodiment of the application, in the process of conveying the detected object by the first conveying device or the second conveying device, in the case of being in the area outside the detection area, the first conveying device and the second conveying device can be controlled to move at the first speed, and in the case of detecting that the detected object is in the detection area, the first conveying device and the second conveying device can be controlled to move at the second speed so that the detected object passes through the detection area at the second speed, wherein the second speed is smaller than the first speed. Therefore, the detected object is transmitted in a variable speed mode, the transmission speed of the detection area is lower than that outside the detection area, the detected object passes through the detection area at a lower speed, and the CT detection efficiency can be improved while the detection accuracy is guaranteed.

In some embodiments, the apparatus may further include:

the third control module is used for controlling the closing of the inlet shielding window and the outlet shielding window under the condition that the detected object is placed in the detection area, the inlet shielding window is arranged at the inlet of the detection chamber, and the outlet shielding window is arranged at the outlet of the detection chamber;

and the fourth control module is used for controlling the CT detection equipment to open the ray shutter under the condition that the inlet shielding window and the outlet shielding window are detected to be closed.

In some embodiments, the apparatus may further include:

and the fifth control module is used for controlling the opening of the outlet shielding window under the condition that the detected object is detected to reach the preset position of the second conveying device and the ray shutter of the CT detection device is closed.

In some embodiments, the apparatus may further include:

and the sixth control module is used for controlling the first conveying equipment and the second conveying equipment to stop moving and controlling the first alarm to give an alarm when the condition that the outlet shielding window cannot be completely opened is detected, and the first alarm is arranged at the outlet of the detection chamber.

In some embodiments, the apparatus may further include:

and the seventh control module is used for controlling the third conveying device and the fourth conveying device to move at the first speed under the condition that the detected object is placed on the third conveying device or the fourth conveying device, wherein one end of the third conveying device is arranged at the inlet of the detection chamber, the other end of the third conveying device extends towards the direction far away from the inlet of the detection chamber, one end of the fourth conveying device is arranged at the outlet of the detection chamber, and the other end of the fourth conveying device extends towards the direction far away from the outlet of the detection chamber.

In some embodiments, the apparatus may further include:

the acquisition module is used for acquiring height information and width information of the detected object;

and the eighth control module is used for controlling the third conveying equipment to stop moving and controlling the second alarm to give an alarm when the fact that the height information and/or the width information of the detected object do not meet the preset conditions is detected, and the second alarm is arranged at the inlet of the detection chamber.

In some embodiments, the apparatus may further include:

and the ninth control module is used for controlling a third alarm to give an alarm when the detected object is detected to reach the preset position of the fourth conveying equipment, and the third alarm is arranged close to one end, far away from the outlet, of the fourth conveying equipment.

Fig. 5 shows a hardware structure diagram of an electronic device provided in an embodiment of the present application.

The electronic device may comprise a processor 501 and a memory 502 in which computer program instructions are stored.

Specifically, the processor 501 may include a Central Processing Unit (CPU), or an Application Specific Integrated Circuit (ASIC), or may be configured to implement one or more Integrated circuits of the embodiments of the present Application.

Memory 502 may include a mass storage for data or instructions. By way of example, and not limitation, memory 502 may include a Hard Disk Drive (HDD), a floppy Disk Drive, flash memory, an optical Disk, a magneto-optical Disk, tape, or a Universal Serial Bus (USB) Drive or a combination of two or more of these. Memory 502 may include removable or non-removable (or fixed) media, where appropriate. The memory 502 may be internal or external to the integrated gateway disaster recovery device, where appropriate. In a particular embodiment, the memory 502 is non-volatile solid-state memory.

In particular embodiments, memory 502 may include Read Only Memory (ROM), random Access Memory (RAM), magnetic disk storage media devices, optical storage media devices, flash memory devices, electrical, optical, or other physical/tangible memory storage devices. Thus, in general, the memory includes one or more tangible (non-transitory) computer-readable storage media (e.g., memory devices) encoded with software comprising computer-executable instructions and when the software is executed (e.g., by one or more processors), it is operable to perform operations described with reference to the methods according to an aspect of the present disclosure.

The processor 501 reads and executes the computer program instructions stored in the memory 502 to implement any one of the CT detection methods in the above embodiments.

In one example, the electronic device can also include a communication interface 503 and a bus 510. As shown in fig. 5, the processor 501, the memory 502, and the communication interface 503 are connected to each other through a bus 510 to complete communication therebetween.

The communication interface 503 is mainly used for implementing communication between modules, apparatuses, units and/or devices in the embodiments of the present application.

Bus 510 includes hardware, software, or both to couple the components of the electronic device to each other. By way of example, and not limitation, a bus may include an Accelerated Graphics Port (AGP) or other graphics bus, an Enhanced Industry Standard Architecture (EISA) bus, a Front Side Bus (FSB), a Hypertransport (HT) interconnect, an Industry Standard Architecture (ISA) bus, an infiniband interconnect, a Low Pin Count (LPC) bus, a memory bus, a Micro Channel Architecture (MCA) bus, a Peripheral Component Interconnect (PCI) bus, a PCI-Express (PCI-X) bus, a Serial Advanced Technology Attachment (SATA) bus, a video electronics standards association local (VLB) bus, or other suitable bus or a combination of two or more of these. Bus 510 may include one or more buses, where appropriate. Although specific buses are described and shown in the embodiments of the present application, any suitable buses or interconnects are contemplated by the present application.

The electronic device may execute the CT detection method in the embodiment of the present application, so as to implement the CT detection method and apparatus described in conjunction with fig. 2 and 4.

In addition, in combination with the CT detection method in the foregoing embodiments, the embodiments of the present application may provide a computer-readable storage medium to implement. The computer readable storage medium having stored thereon computer program instructions; the computer program instructions, when executed by a processor, implement any of the CT detection methods in the above embodiments.

In combination with the CT detection method in the foregoing embodiments, the present application may provide a computer program product, where instructions of the computer program product, when executed by a processor of an electronic device, cause the electronic device to perform the CT detection method as described above.

It is to be understood that the present application is not limited to the particular arrangements and instrumentalities described above and shown in the attached drawings. A detailed description of known methods is omitted herein for the sake of brevity. In the above embodiments, several specific steps are described and shown as examples. However, the method processes of the present application are not limited to the specific steps described and illustrated, and those skilled in the art can make various changes, modifications, and additions or change the order between the steps after comprehending the spirit of the present application.

The functional blocks shown in the above-described structural block diagrams may be implemented as hardware, software, firmware, or a combination thereof. When implemented in hardware, it may be, for example, an electronic circuit, an Application Specific Integrated Circuit (ASIC), suitable firmware, plug-in, function card, or the like. When implemented in software, the elements of the present application are the programs or code segments used to perform the required tasks. The program or code segments may be stored in a machine-readable medium or transmitted by a data signal carried in a carrier wave over a transmission medium or a communication link. A "machine-readable medium" may include any medium that can store or transfer information. Examples of a machine-readable medium include electronic circuits, semiconductor memory devices, ROM, flash memory, erasable ROM (EROM), floppy disks, CD-ROMs, optical disks, hard disks, fiber optic media, radio Frequency (RF) links, and so forth. The code segments may be downloaded via computer networks such as the internet, intranet, etc.

It should also be noted that the exemplary embodiments mentioned in this application describe some methods or systems based on a series of steps or devices. However, the present application is not limited to the order of the above-described steps, that is, the steps may be performed in the order mentioned in the embodiments, may be performed in an order different from the order in the embodiments, or may be performed simultaneously.

Aspects of the present disclosure are described above 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 block of the flowchart illustrations and/or block diagrams, and combinations of 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, 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, enable the implementation of the functions/acts specified in the flowchart and/or block diagram block or blocks. Such a processor may be, but is not limited to, a general purpose processor, a special purpose processor, an application specific processor, or a field programmable logic circuit. It will also be understood that each block of the block diagrams and/or flowchart illustration, and combinations of blocks in the block diagrams and/or flowchart illustration, can be implemented by special purpose hardware for performing the specified functions or acts, or combinations of special purpose hardware and computer instructions.

As described above, only the specific embodiments of the present application are provided, and it can be clearly understood by those skilled in the art that, for convenience and brevity of description, the specific working processes of the system, the module and the unit described above may refer to the corresponding processes in the foregoing method embodiments, and are not described herein again. It should be understood that the scope of the present application is not limited thereto, and any person skilled in the art can easily conceive various equivalent modifications or substitutions within the technical scope of the present application, and these modifications or substitutions should be covered within the scope of the present application.

Claims

1. A CT inspection system, comprising:

the CT detection equipment is arranged in the detection chamber;

2. The system of claim 1, further comprising:

an inlet shielding window which is arranged at the inlet of the detection chamber and can be opened or closed;

the outlet shielding window is arranged at the outlet of the detection chamber, and can be opened or closed;

the control unit is in communication connection with the entrance shielding window and the exit shielding window, and is configured to:

when the detected object is detected to reach the preset position of the first conveying device, controlling the entrance shielding window to be closed;

and controlling the opening of the inlet shielding window and the outlet shielding window under the condition that the detected object reaches the first preset position of the second conveying device and the ray shutter of the CT detection device is closed.

3. The system of claim 2, further comprising:

the first alarm is arranged at the outlet of the detection chamber;

the control unit is in communication connection with the first alarm, and is used for:

and controlling the first conveying equipment and the second conveying equipment to stop moving and controlling the first alarm to give an alarm when the detected object reaches a second preset position of the second conveying equipment and the outlet shielding window cannot be completely opened.

4. The system of claim 2, further comprising:

the third conveying device is provided with one end arranged at the inlet of the detection chamber, and the other end extends towards the direction far away from the inlet of the detection chamber;

one end of the fourth conveying device is arranged at the outlet of the detection chamber, and the other end of the fourth conveying device extends towards the direction far away from the outlet of the detection chamber;

the control unit is connected with the third transmission device and the fourth transmission device in a communication manner, and is configured to:

in the case that the detected object is detected to be placed on the third conveying device and the entrance shielding window is opened, controlling the third conveying device to move at a first speed;

in the case that the detected object is placed on the fourth conveying device, controlling the fourth conveying device to move at a first speed;

when the detected object is detected to reach a first preset position of the fourth conveying device, controlling the outlet shielding window to be closed;

under the condition that the detected object is detected to reach the preset position of the first conveying device, controlling the third conveying device to stop moving;

and controlling the fourth conveying device to stop moving under the condition that the detected object is detected to reach a second preset position of the fourth conveying device.

5. The system of claim 4, further comprising:

the height limiting sensor is arranged at the inlet of the detection chamber and is used for acquiring the height information of the detected object;

the width limiting sensor is arranged at the inlet of the detection chamber and is used for acquiring the width information of the detected object;

the second alarm is arranged at the inlet of the detection chamber;

the control unit is in communication connection with the height limit sensor, the width limit sensor and the second alarm, and is used for:

and under the condition that the detected height information and/or width information of the detected object do not meet the preset conditions, controlling the third conveying equipment to stop moving and controlling the second alarm to give an alarm.

6. The system of claim 4, further comprising:

the third alarm is arranged at the outlet of the detection chamber;

the control unit is in communication connection with the third alarm, and is used for:

and controlling the third alarm to alarm under the condition that the detected object is detected to reach a second preset position of the fourth conveying equipment.

7. The system of claim 1, wherein the length of the first conveyor apparatus is greater than the length of the second conveyor apparatus.

8. The system of claim 1, further comprising:

the tray comprises at least one specification and is used for containing the object to be detected.

9. A CT detection method applied to the CT detection system according to any one of claims 1 to 8, the method comprising:

10. A CT detection apparatus, for use in a CT detection system according to any one of claims 1 to 8, the apparatus comprising: