CN109444971B - An object detection device - Google Patents

Abstract

The present invention discloses an article detection device, comprising: a portal frame, comprising a horizontal arm at the top, and two vertical arms located on both sides of the horizontal arm and connected to the horizontal arm, wherein the portal frame forms a detection channel through the area surrounded by the horizontal arm and the two vertical arms; and an article detection component based on radiation imaging, at least partially arranged on the portal frame, for detecting articles passing through the portal frame; wherein the horizontal arm comprises a telescopic device, which can change the length of the horizontal arm through its own telescopic movement. The embodiment of the present invention changes the length of the horizontal arm through the telescopic movement of the telescopic device, thereby improving the detection efficiency of different articles to be detected.

Description

An object detection device

Technical Field

The present invention relates to the field of safety detection, and in particular to an object detection device.

Background Art

At present, the inspection of cargo, combined cargo, vehicle-mounted cargo or vehicles is mostly completed by gantry inspection systems. Among them, the inspection of vehicle-mounted cargo or vehicles that can move autonomously can be completed by a fixed gantry inspection system; while for cargo or combined cargo that cannot move autonomously, the gantry inspection system needs to be equipped with additional mobile facilities such as conveyor belts.

However, due to the variety of cargo, especially for the inspection of modular cargo, vehicle-mounted cargo or vehicles, since the shapes and sizes of the items to be inspected are difficult to unify, it is necessary to set up inspection devices suitable for items of different shapes and sizes in the inspection area, and classify the items to be inspected according to their shapes and sizes, so that they can pass through the inspection devices corresponding to their own shapes and sizes, resulting in low detection efficiency.

In addition, for some modular goods, vehicle-mounted goods and vehicles, their width dimensions are much smaller than their length dimensions. For such goods, when they pass through the detection device in the width direction, the passability requirements for the detection device are relatively low. However, in the detection area, goods are often stacked and vehicles are parked closely, and it is often difficult to adjust the angles of the modular goods, vehicle-mounted goods and vehicles and pass through the detection device in the width direction, which also leads to low detection efficiency.

Summary of the invention

At least one object of the present invention is to provide an object detection device that can improve the detection efficiency of objects. The preferred technical solutions among the many technical solutions provided by the present invention can produce many technical effects as described below.

To achieve the above object, the present invention provides the following technical solutions:

The present invention provides an article detection device, comprising: a portal frame, comprising a horizontal arm located at the top, and two vertical arms located on both sides of the horizontal arm and connected to the horizontal arm, wherein the portal frame forms a detection channel through the area surrounded by the horizontal arm and the two vertical arms; and an article detection component based on radiation imaging, which is at least partially arranged on the portal frame and is used to detect articles passing through the portal frame; wherein the horizontal arm includes a telescopic device, which can change the length of the horizontal arm through its own telescopic movement.

As an optimization of any technical solution or any optimized technical solution provided above or below the present invention, the telescopic device includes at least one level of telescopic cylinder.

As an optimization of any technical solution or any optimized technical solution provided in the foregoing or later text of the present invention, the cross arm includes: a telescopic cross arm, both ends of which are respectively connected to the two vertical arms, and can be extended or shortened to change the length of the cross arm; and a fixed cross arm, one end of which is connected to at least one of the two vertical arms, for supporting the telescopic cross arm.

As an optimization of any technical solution or any optimized technical solution provided above or below the present invention, the object detection device includes: a lifting device, which can make the two vertical arms move up or down through its own lifting movement.

As an optimization of any technical solution or any optimized technical solution provided above or below the present invention, the object detection device includes: a wheeled walking device, which is respectively arranged at the lower ends of the two vertical arms, and can make the object detection device walk and turn relative to the ground through its own walking movement.

As an optimization of any technical solution or any optimized technical solution provided before or after the present invention, the object detection device includes: a ray cabin, which is arranged on one of the two vertical arms, and the ray cabin includes a ray source, which can emit detection rays to scan objects passing through the portal frame; a detector, which is arranged on the portal frame and can detect the transmission signal or scattered signal of the detection ray on the object for scanning and imaging; and a protective wall, which is arranged on the other of the two vertical arms.

As an optimization of any technical solution or any optimized technical solution provided in the foregoing or later text of the present invention, the horizontal arm includes: a telescopic horizontal arm, both ends of which are respectively connected to the two vertical arms, and the telescopic horizontal arm can be extended or shortened to change the length of the horizontal arm; and a fixed horizontal arm, one end of which is connected to at least one of the two vertical arms, for supporting the telescopic vertical arm; wherein at least part of the detector is arranged on the telescopic horizontal arm.

As an optimization of any technical solution or any optimized technical solution provided in the foregoing or later text of the present invention, the object detection device includes: a first detection arm, fixedly connected to the fixed cross arm; and a second detection arm, rotatably connected to the fixed cross arm, the first detection arm or the telescopic cross arm; wherein the detectors are respectively mounted on the first detection arm and the second detection arm.

As an optimization of any technical solution or any optimized technical solution provided in the foregoing or later text of the present invention, the object detection device includes: a lifting device, which can make the two vertical arms move up or down through its own lifting movement; and a wheeled walking device, which is respectively arranged at the lower ends of the two vertical arms, and can make the object detection device move and turn relative to the ground through its own walking movement.

As an optimization of any technical solution or any optimized technical solution provided above or below the present invention, the object detection device includes: a controller for controlling the lifting movement of the lifting device, the telescopic movement of the telescopic device and the walking movement of the wheeled walking device.

As an optimization of any technical solution or any optimized technical solution provided before or after the present invention, the controller is configured to: control the telescopic device to perform the telescopic movement of the cross arm and/or the lifting device to perform the lifting movement of the portal frame to change the size of the detection channel.

As an optimization of any technical solution or any optimized technical solution provided in the foregoing or later text of the present invention, the object detection device includes: a remote control and a remote control command transmission component, the remote control command transmission component is arranged on the portal frame and is electrically connected to the controller, and the remote control can remotely communicate with the remote control command transmission component so that the operator can remotely control the lifting device, the telescopic device and the wheeled walking device.

Based on the above technical solution, the embodiment of the present invention changes the length of the cross arm through the telescopic movement of the telescopic device, thereby changing the size of the detection channel according to the size of the object to be detected, so as to improve the detection efficiency of the object detection device provided by the present invention for different goods, combined goods, vehicle-mounted goods or vehicles.

BRIEF DESCRIPTION OF THE DRAWINGS

The drawings described herein are used to provide a further understanding of the present invention and constitute a part of this application. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

FIG1 is a schematic diagram of the structure of some embodiments of the object detection device provided by the embodiment of the present invention from a front view;

FIG2 is a schematic diagram of a front view of an unextended state of some other embodiments of the object detection device provided by the embodiments of the present invention;

FIG3 is a schematic diagram of an elongated state of some other embodiments of the object detection device provided by the embodiments of the present invention when viewed from the front;

FIG4 is a schematic diagram of the structure of some other embodiments of the object detection device provided by the embodiments of the present invention from a front view;

FIG. 5 is a schematic diagram of the structure of some other embodiments of the object detection device provided by the embodiment of the present invention from a front view angle

FIG6 is a schematic diagram of a top view structure of some embodiments of the object detection device provided by the embodiments of the present invention;

Figure numerals: 1. horizontal arm, 11. telescopic device, 12. fixed horizontal arm, 13. telescopic horizontal arm, 2. vertical arm, 2 (a) first vertical arm, 2 (b) second vertical arm, 21. lifting device, 23. wheeled walking device, 3. object detection component, 31. radiation cabin, 32. radiation source, 33. detector, 34. protective wall.

DETAILED DESCRIPTION

The content of the present invention and the differences between the present invention and the prior art can be understood by referring to the accompanying drawings and text content. The technical solution (including the preferred technical solution) of the present invention is further described in detail below by means of the accompanying drawings and listing some optional embodiments of the present invention.

It should be noted that any technical feature and any technical solution in this embodiment are one or several of multiple optional technical features or optional technical solutions. For the sake of brevity, this document cannot list all the alternative technical features and alternative technical solutions of the present invention, nor is it convenient to emphasize that each implementation method of each technical feature is one of multiple optional implementation methods. Therefore, those skilled in the art should know that any technical means provided by the present invention can be replaced or any two or more technical means or technical features provided by the present invention can be combined with each other to obtain a new technical solution.

Any technical features and any technical solutions in this embodiment do not limit the protection scope of the present invention. The protection scope of the present invention should include any alternative technical solutions that can be thought of by those skilled in the art without creative work, as well as new technical solutions obtained by those skilled in the art by combining any two or more technical means or technical features provided by the present invention.

The technical solution provided by the present invention is described in more detail below with reference to Figures 1 to 6.

As shown in Figure 1, an article detection device provided by the present invention includes: a portal frame, including a horizontal arm 1 located at the top, and two vertical arms 2 (including a first vertical arm 2(a) and a second vertical arm 2(b)) located on both sides of the horizontal arm and connected to the horizontal arm, wherein the portal frame forms a detection channel through the area surrounded by the horizontal arm and the two vertical arms; and an article detection component 3 based on radiation imaging, which is at least partially arranged on the portal frame and is used to detect articles passing through the portal frame; wherein the horizontal arm 1 includes a telescopic device 11, which can change the length of the horizontal arm 1 through its own telescopic movement.

The object detection component 3 based on radiation imaging can use radiation to observe the inside of an object. The object detection component 3 can obtain information such as the structure and density of the object without destroying the object, and is currently widely used in security inspections at stations, docks and airports.

For the case where the items to be detected are cargo, modular cargo, vehicle-mounted cargo or vehicles, taking modular cargo as an example, the item detection device provided by the present invention can change the length of the cross arm 1 through its own telescopic movement, and then adaptively adjust the different sizes and shapes of the modular cargo, so that the detection channel can allow the modular cargo to pass through.

For those skilled in the art, the goods to be inspected can be passed through the detection channel in a variety of existing ways, including but not limited to conveyor belts, transport carts, etc., which will not be described in detail here. Accordingly, by making the object detection device have a certain mobility, such as equipping it with wheels or configuring it with pulleys and slide rails, the detection channel of the object detection device can also pass through the object to be inspected without the object to be inspected moving.

As an optimization of any technical solution or any optimized technical solution provided above or below the present invention, the telescopic device includes at least one level of telescopic cylinder.

The telescopic cylinder can be connected to a control hydraulic oil circuit, so that the operator can easily adjust the telescopic movement of the telescopic cylinder by controlling the hydraulic oil circuit; the telescopic cylinder can also be configured for manual input pressure to reduce the cost of the telescopic device and obtain a simpler control method.

The telescopic oil cylinder can be one-stage or multi-stage. When the telescopic oil cylinder is multi-stage, the telescopic oil cylinder can have a wider range of telescopic movement. In addition, for the multi-stage telescopic oil cylinder, by controlling each stage of the telescopic oil cylinder, the telescopic movement of the telescopic oil cylinder can be faster and the operation response speed can be faster.

As shown in Figure 2, as an optimization of any technical solution or any optimized technical solution provided in the foregoing or later text of the present invention, the cross arm includes: a telescopic cross arm 13, both ends of which are respectively connected to the two vertical arms, and can be extended or shortened to change the length of the cross arm; and a fixed cross arm 12, one end of which is connected to at least one of the two vertical arms, for supporting the telescopic cross arm.

The fixed cross arm can support the telescopic cross arm, thereby improving the overall strength and rigidity of the cross arm. In particular, when the cross arm has a large length under the action of the telescopic device, the fixed cross arm can effectively reduce the deflection of the cross arm, so that the components arranged on the cross arm are less affected, thereby improving the detection effect of the object to be detected.

In addition, the fixed cross arm can also serve as a guide rail for the telescopic cross arm to perform telescopic movement, so that the cross arm is more stable during the extension or shortening of the telescopic cross arm, so that the object detection component that applies the radiation imaging principle and is sensitive to vibration is less affected by the telescopic movement of the cross arm, thereby reducing the failure rate and improving the service life of the object detection component that is at least partially arranged on the portal frame. Figures 2 to 3 show the process of extending or shortening the length of the cross arm by means of the telescopic cross arm and the fixed cross arm of the present invention.

As shown in FIG4 , as an optimization of any technical solution or any optimized technical solution provided above or below in the present invention, the article detection device includes: a lifting device 21, which can make the two vertical arms move up or down through its own lifting movement. The lifting device can use a telescopic cylinder, or other devices that can lift or lower the vertical arms, such as a jack or other mechanism.

As shown in FIG4 , the lifting device is located above the article detection component 3 on the vertical arm 2, so that the article detection component 3 can continue to be supported by the vertical arm in contact with the ground when the lifting device 21 is lifting, so that it is less affected by the lifting movement. However, those skilled in the art should understand that the lifting device can also be located below the article detection component 3, or other positions that can change the length of the vertical arm.

By adjusting the vertical arm to rise or fall by the lifting device, the horizontal arm can have different height positions. For objects to be detected with a higher height, by raising the height position of the horizontal arm, the object detection assembly provided by the present invention can continue to be applicable; and for objects to be detected with a lower height, the height position of the horizontal arm can also be lowered to make the horizontal arm close to the upper side of the object to be detected, thereby improving the detection accuracy of the object detection assembly arranged on the horizontal arm.

As an optimization of any technical solution or any optimized technical solution provided in the foregoing or later text of the present invention, the object detection device includes: a wheeled walking device 23, which is respectively arranged at the lower ends of the two vertical arms (including the first vertical arm 2 (a) and the second vertical arm 2 (b)), and can make the object detection device walk and turn relative to the ground through its own walking movement.

The wheeled walking device 23 can be configured as a wheeled machine with autonomous walking capability, or as a pulley mechanical assembly matched with a preset slide rail. The wheeled walking device 23 can enable the object detection device to be mobile, thereby facilitating the transfer and position adjustment of the object detection device and the detection of stationary objects to be detected.

The wheeled walking device 23, as the part of the portal frame in contact with the ground, should have strong stability in the detection state, and thus can be equipped with fixed legs or other parts to provide stability for the object detection device in a stationary state.

As shown in Figure 5, as an optimization of any technical solution or any optimized technical solution provided in the foregoing or later text of the present invention, the object detection device includes: a ray cabin, which is arranged on one of the two vertical arms (i.e., the first vertical arm 2(a) or the second vertical arm 2(b)), and the ray cabin includes a ray source, which can emit detection rays to scan objects passing through the portal frame; a detector, which is arranged on the portal frame and can detect the transmission signal or scattered signal of the detection ray on the object for scanning and imaging; and a protective wall, which is arranged on the other of the two vertical arms (i.e., the corresponding second vertical arm 2(b) or the first vertical arm 2(a)).

The detector is set in three positions: the same as the vertical arm where the ray source is located, the vertical arm opposite to it, and the horizontal arm. Correspondingly, when the detector is set on the vertical arm opposite to the vertical arm where the ray source is located and/or on the horizontal arm, the signal detected by the detector is mainly a projection signal; and when the detector is set on the vertical arm that is the same as the vertical arm where the ray source is located, the signal detected by the detector is mainly a scattered signal. The projection signal and the scattered signal can reflect different information of the object to be detected, and thus have different imaging principles and detection emphases, and can be selectively set according to the type of the object to be detected or the working scene of the object detection device.

As an optimization of any technical solution or any optimized technical solution provided in the foregoing or later text of the present invention, the horizontal arm includes: a telescopic horizontal arm, both ends of which are respectively connected to the two vertical arms, and the telescopic horizontal arm can be extended or shortened to change the length of the horizontal arm; and a fixed horizontal arm, one end of which is connected to at least one of the two vertical arms, for supporting the telescopic vertical arm; wherein at least part of the detector is arranged on the telescopic horizontal arm.

The detector at least partially disposed on the telescopic cross arm can ensure that during the extension of the cross arm, the detector can relatively completely detect the detection signal of the area above the detection channel, so as to make the scanning imaging of the object to be detected more complete and accurate.

As an optimization of any technical solution or any optimized technical solution provided in the foregoing or later text of the present invention, the object detection device includes: a first detection arm, fixedly connected to the fixed cross arm; and a second detection arm, rotatably connected to the fixed cross arm, the first detection arm or the telescopic cross arm; wherein the detectors are respectively mounted on the first detection arm and the second detection arm.

During the extension and retraction of the cross arm, the passable area of the detection channel increases, so that the original detector can no longer fully cover the scanning area. Therefore, a first detection arm is set on the fixed cross arm, and a second detection arm is rotatably connected to the telescopic cross arm, the first detection arm or the telescopic cross arm is set, so as to expand the detection area of the detector when the cross section of the channel changes.

Specifically, when the second detection arm is hinged to the end of the fixed cross arm that is not fixed to the vertical arm, the second detection arm can choose to rotate to one side of the fixed cross arm or to one side of the movable cross arm. When the object detection device is in a smaller detection channel state, the telescopic cross arm is relatively short in length. At this time, the second detection arm arranged on the fixed cross arm can choose to turn to the fixed cross arm according to the size of the detected object, and be arranged side by side with the first detector. At this time, one of the first detector or the second detector can be selectively turned on. When the object detection device is in a larger detection channel state, the second detection arm can turn to the direction of extension of the telescopic cross arm, and be retracted to the telescopic cross arm, and be arranged side by side with the first detection arm in a colinear manner, so that the extended telescopic cross arm portion has a detector, which can effectively expand the detection range of the cross arm in the larger detection channel state.

When the second detection arm is hinged to the fixed horizontal arm or the telescopic horizontal arm is fixed to one end of the vertical arm, the second detection arm can choose to rotate toward the fixed horizontal arm or the movable horizontal arm, and the second detection arm and the first detection arm are both set on the horizontal arm; the second detection arm can also choose to rotate toward one of the two vertical arms, and the first detection arm continues to be located on the horizontal arm, while the second detection arm is located on one of the two vertical arms. The above two settings, that is, the second detection arm is located on the horizontal arm or one of the two vertical arms, will bring about two detection ranges within the detection channel, so it can be flexibly selected according to the state of the goods to be detected.

As an optimization of any technical solution or any optimized technical solution provided in the foregoing or later text of the present invention, the object detection device includes: a lifting device, which can make the two vertical arms move up or down through its own lifting movement; and a wheeled walking device, which is respectively arranged at the lower ends of the two vertical arms, and can make the object detection device move and turn relative to the ground through its own walking movement.

As an optimization of any technical solution or any optimized technical solution provided above or below the present invention, the object detection device includes: a controller for controlling the lifting movement of the lifting device, the telescopic movement of the telescopic device and the walking movement of the wheeled walking device.

The controller can be constructed by a hydraulic control system or an electrical control system, depending on the operating principle of the object controlled by the controller. Through the controller, the operator can perform various motion controls on the object detection device with relatively little effort and convenience, so that the object detection device can adapt to various application scenarios.

As an optimization of any technical solution or any optimized technical solution provided before or after the present invention, the controller is configured to: control the telescopic device to perform the telescopic movement of the cross arm and/or the lifting device to perform the lifting movement of the portal frame to change the size of the detection channel.

As mentioned above, the size of the detection channel can be flexibly determined according to the size of the object to be detected, and the size of the detection channel can be made only slightly larger than the size of the object to be detected, so as to obtain a better detection effect. Accordingly, since the telescopic device or the lifting device can be configured to have a multi-level structure, the detection of the object to be detected can have a certain order accordingly. For example, the object to be detected that only needs to perform one level of telescopic or lifting movement is first detected, and then the objects to be detected that need to perform two, three or more telescopic or lifting movements are detected in turn, so that in each round of detection, the controller only needs to control the telescopic device or the lifting device at the same level.

In order to realize remote control of the object detection device provided by the present invention, as an optimization of any technical solution or any optimized technical solution provided in the foregoing or later text of the present invention, the object detection device includes: a remote control and a remote control command transmission component, the remote control command transmission component is arranged on the portal frame and is electrically connected to the controller, and the remote control can remotely communicate with the remote control command transmission component so that the operator can remotely control the lifting device, the telescopic device and the wheeled walking device.

Unless otherwise stated, any technical solution disclosed in the present invention disclosed above, if it discloses a numerical range, then the disclosed numerical range is a preferred numerical range, and any technician in the field should understand that the preferred numerical range is only a numerical value with a more obvious technical effect or representative value among many implementable numerical values. Since there are too many numerical values to be exhaustive, the present invention discloses some numerical values to illustrate the technical solution of the present invention, and the numerical values listed above should not constitute a limitation on the scope of protection of the present invention.

If the words "first", "second" and so on are used in this article to limit components, those skilled in the art should know that the use of "first" and "second" is only for the convenience of description to distinguish the components. Unless otherwise stated, the above words have no special meaning.

At the same time, if the above-mentioned invention discloses or involves components or structural parts that are fixedly connected to each other, then, unless otherwise stated, the fixed connection can be understood as: a detachable fixed connection (for example, connected by bolts or screws), and can also be understood as: a non-detachable fixed connection (for example, riveting, welding). Of course, the mutual fixed connection can also be replaced by an integrated structure (for example, manufactured by one-piece molding using a casting process) (except when it is obviously impossible to use an one-piece molding process).

In addition, the terms used in any technical solution disclosed in the present invention to indicate positional relationships or shapes include states or shapes that are similar, similar or close to them unless otherwise stated. Any component provided by the present invention may be assembled from multiple separate components or may be a separate component manufactured by an integrated molding process.

If the terms "center", "longitudinal", "lateral", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc. are used in the description of the present invention, the orientation or position relationship indicated by the above terms is based on the orientation or position relationship shown in the accompanying drawings, which is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the referred device, mechanism, component or element must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as limiting the scope of protection of the present invention.

Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, ordinary technicians in the field should understand that the specific implementation methods of the present invention can still be modified or some technical features can be replaced by equivalents without departing from the spirit of the technical solution of the present invention, which should be included in the scope of the technical solution for protection of the present invention.

Claims (10)

1. An article detection device, comprising:

The portal frame comprises a cross arm positioned at the top and two vertical arms positioned at two sides of the cross arm and connected with the cross arm, and the portal frame forms a detection channel through an area surrounded by the cross arm and the two vertical arms; and

An article detection assembly based on radiation imaging, at least partially disposed on the portal frame, for detecting articles passing through the portal frame; the cross arm comprises a telescopic device, and the length of the cross arm can be changed through telescopic movement of the cross arm; the cross arm comprises a telescopic cross arm and a fixed cross arm, two ends of the telescopic cross arm are respectively connected to the two vertical arms, the telescopic cross arm can be lengthened or shortened to change the length of the cross arm, and one end of the fixed cross arm is connected to at least one of the two vertical arms;

wherein the article detection device further comprises:

the ray cabin body is arranged on one of the two vertical arms and comprises a ray source which can emit detection rays to scan objects passing through the portal frame;

the detector is arranged on the portal frame and can detect transmission signals or scattering signals of the detection rays on the object so as to perform scanning imaging;

The first detection arm is fixedly connected with the fixed cross arm; and

The second detection arm is rotatably connected with the fixed cross arm, the first detection arm or the telescopic cross arm;

wherein the detector is mounted on the first and second detection arms, respectively.

2. The article inspection unit of claim 1, wherein the telescoping device comprises at least one stage of telescoping cylinder.

3. The article inspection unit of claim 1, wherein the fixed cross arm is configured to support the telescoping cross arm.

4. The article detection device according to claim 1, wherein the article detection device comprises:

The lifting device can enable the two vertical arms to ascend or descend through self lifting movement.

5. The article detection device according to claim 1, wherein the article detection device comprises:

The wheel type walking devices are respectively arranged at the lower ends of the two vertical arms, and can enable the article detection device to walk and turn relative to the ground through self walking motion.

6. The article detection device according to claim 1, wherein the article detection device comprises:

And the protective wall is arranged on the other one of the two vertical arms.

7. The article detection device of claim 6, wherein the article detection device comprises:

the lifting device can enable the two vertical arms to ascend or descend through self lifting movement;

The wheel type walking devices are respectively arranged at the lower ends of the two vertical arms, and can enable the article detection device to walk and turn relative to the ground through self walking motion.

8. The article detection device of claim 7, wherein the article detection device comprises:

And the controller is used for controlling the lifting motion of the lifting device, the telescopic motion of the telescopic device and the walking motion of the wheel type walking device.

9. The article detection device of claim 8, wherein the controller is configured to: and controlling the telescopic device to execute telescopic movement of the cross arm and/or the lifting device to execute lifting movement of the door-type frame so as to change the size of the detection channel.

10. The article detection device of claim 8, wherein the article detection device comprises:

The remote control command transmission assembly is arranged on the portal frame and is electrically connected with the controller, and the remote controller can be in remote communication with the remote control command transmission assembly so that an operator can remotely control the lifting device, the telescopic device and the wheel-type walking device.