Automatic inventory checking method and device based on IRT and RFID

Abstract

The invention discloses an automatic inventory checking method based on IRT and RFID. The method comprises the steps that a first scanning recognition device scans an RFID chip of a cargo stack at a first scanning point to obtain cargo batch information; a first scanning recognition device obtains a first image of the cargo stack at a first scanning point; the first scanning recognition device recognizes whether a gap-like area exists in the cargo stack or not based on the first image; if the first scanning recognition device recognizes that the gap-like area exists in the cargo stack, the first scanning recognition device starts a second scanning point; and determining a first orientation and a first size of the gap-like area by the first scanning identification device, and sending the first orientation and the first size to the second scanning identification device by the first scanning identification device. According to the method, the probability of false alarm can be reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of image recognition, and in particular to an automatic inventory counting method and device based on IRT and RFID. Background Art

[0002] According to the relevant standards for the investment and construction of logistics and warehousing facilities and equipment in the tobacco industry, at present, medium and large-scale tobacco logistics and warehousing systems generally adopt high-bay warehouses, intensive warehouses (power warehouses) or multi-layer shelf structures. According to the relevant provisions of warehousing management, frequent inventory counting operations are required in the process of cigarette storage management. At present, in the warehousing of the tobacco industry, cigarettes are stored and moved in the form of cigarettes (a cigarette is generally 50 cigarettes, and a cigarette generally refers to a box of cigarettes with 50 cigarettes packed and boxed). In the process of moving cigarettes, multiple cigarettes are generally stacked into cigarette stacks, and then a forklift is used to move the cigarette stacks, so as to realize the movement of cigarettes in the warehouse. In the process of moving cigarettes, there may be a gap between two cigarettes in the cigarette stack due to errors in forklift operation or vibrations during the movement of the forklift. When the gap reaches a certain size, the cigarettes on the outside of the cigarette stack may fall from the forklift, which in turn causes the cigarettes inside the cigarette stack to squeeze each other. Such squeezed cigarettes can generally only be destroyed as defective products. Due to the value of the cigarettes themselves, a cigarette falling accident may cause economic losses of thousands of yuan. Therefore, image recognition technology (IRT) is needed to determine whether there is a large gap on the cigarette stack. If there is a large gap, the system will send an alarm signal to prompt the forklift driver to stop quickly and re-stack the cigarette stack. However, the existing system has the defect of false alarm. Summary of the invention

[0003] The present invention provides an automatic inventory counting method based on IRT and RFID. The method of the present invention can reduce the probability of false alarm by comparing the orientation and size of the gap-like area at two different scanning points, thereby solving the problems of the prior art.

[0004] The present invention provides an automatic inventory counting method based on IRT and RFID, the method comprising:

[0005] The first scanning and identifying device scans the RFID chip of the cargo stack at the first scanning point to obtain cargo batch information;

[0006] The first scanning and identifying device acquires a first image of the stack of goods at a first scanning point;

[0007] The first scanning and identifying device identifies whether there is a gap-like area in the stack of goods based on the first image;

[0008] If the first scanning and identifying device identifies the presence of a gap-like area in the stack of goods, the first scanning and identifying device activates the second scanning point; and

[0009] The first scanning and identifying device determines a first orientation and a first size of the gap-like area, and sends the first orientation and the first size to the second scanning and identifying device, wherein the second scanning and identifying device is located at a second scanning point.

[0010] In a preferred embodiment, the method further comprises:

[0011] The second scanning and identifying device scans the RFID chip of the cargo stack at the second scanning point to obtain cargo batch information;

[0012] The second scanning and identifying device calls the first orientation and the first size based on the cargo batch information;

[0013] The second scanning and identifying device acquires a second image of the cargo stack at a second scanning point;

[0014] The second scanning and identifying device identifies whether there is a gap-like region in the stack of goods based on the second image.

[0015] If the second scanning and identifying device identifies that there is no gap-like area in the stack of goods, the second scanning and identifying device sends a release signal.

[0016] In a preferred embodiment, the method further comprises:

[0017] If the second scanning and identifying device identifies that there is a gap-like region in the stack of goods, the second scanning and identifying device determines a second orientation and a second size of the gap-like region;

[0018] Determining by a second scanning and identifying device whether the first orientation is consistent with the second orientation;

[0019] If the second scanning and identifying device determines that the first orientation is inconsistent with the second orientation, the second scanning and identifying device sends a release signal;

[0020] If the second scanning and identifying device determines that the first orientation is consistent with the second orientation, the second scanning and identifying device determines whether to issue a release signal based on the first size and the second size.

[0021] In a preferred embodiment, the first size includes a first side length and a second side length, wherein the first side length and the second side length are the lengths of the two shorter sides of the gap-like region, respectively; wherein the second size includes a third side length and a fourth side length, wherein the third side length and the fourth side length are the lengths of the two shorter sides of the gap-like region, respectively;

[0022] The second scanning and identifying device determines whether to issue a release signal based on the first size and the second size, including:

[0023] The second scanning and identifying device determines whether to issue a release signal based on the first side length, the second side length, the third side length and the fourth side length.

[0024] In a preferred embodiment, the second scanning and identifying device determines whether to issue a release signal based on the first side length, the second side length, the third side length, and the fourth side length, including:

[0025] If the second scanning and identifying device determines that the third side length and the fourth side length are both greater than the first side length and the second side length, the second scanning and identifying device sends a stop signal;

[0026] If the second scanning and identifying device determines that one of the third side length and the fourth side length is greater than the first side length and the second side length, the second scanning and identifying device sends a stop signal;

[0027] If the second scanning and identifying device determines that the third side length and the fourth side length are both smaller than the first side length and the second side length, the second scanning and identifying device sends a release signal.

[0028] The present invention also provides an automatic inventory counting device based on IRT and RFID, the device comprising modules for performing the following operations:

[0029] The first scanning and identifying device scans the RFID chip of the cargo stack at the first scanning point to obtain cargo batch information;

[0030] The first scanning and identifying device acquires a first image of the stack of goods at a first scanning point;

[0031] The first scanning and identifying device identifies whether there is a gap-like area in the stack of goods based on the first image;

[0032] If the first scanning and identifying device identifies the presence of a gap-like area in the stack of goods, the first scanning and identifying device activates the second scanning point; and

[0033] The first scanning and identifying device determines a first orientation and a first size of the gap-like area, and sends the first orientation and the first size to the second scanning and identifying device, wherein the second scanning and identifying device is located at a second scanning point.

[0034] In a preferred embodiment, the device further comprises a module for performing the following operations:

[0035] The second scanning and identifying device scans the RFID chip of the cargo stack at the second scanning point to obtain cargo batch information;

[0036] The second scanning and identifying device calls the first orientation and the first size based on the cargo batch information;

[0037] The second scanning and identifying device acquires a second image of the cargo stack at a second scanning point;

[0038] The second scanning and identifying device identifies whether there is a gap-like region in the stack of goods based on the second image.

[0039] If the second scanning and identifying device identifies that there is no gap-like area in the stack of goods, the second scanning and identifying device sends a release signal.

[0040] In a preferred embodiment, the device further comprises a module for performing the following operations:

[0041] If the second scanning and identifying device identifies that there is a gap-like region in the stack of goods, the second scanning and identifying device determines a second orientation and a second size of the gap-like region;

[0042] Determining by a second scanning and identifying device whether the first orientation is consistent with the second orientation;

[0043] If the second scanning and identifying device determines that the first orientation is inconsistent with the second orientation, the second scanning and identifying device sends a release signal;

[0044] If the second scanning and identifying device determines that the first orientation is consistent with the second orientation, the second scanning and identifying device determines whether to issue a release signal based on the first size and the second size.

[0045] In a preferred embodiment, the first size includes a first side length and a second side length, wherein the first side length and the second side length are the lengths of the two shorter sides of the gap-like region, respectively; wherein the second size includes a third side length and a fourth side length, wherein the third side length and the fourth side length are the lengths of the two shorter sides of the gap-like region, respectively;

[0046] The second scanning and identifying device determines whether to issue a release signal based on the first size and the second size, including:

[0047] The second scanning and identifying device determines whether to issue a release signal based on the first side length, the second side length, the third side length and the fourth side length.

[0048] In a preferred embodiment, the second scanning and identifying device determines whether to issue a release signal based on the first side length, the second side length, the third side length, and the fourth side length, including:

[0049] If the second scanning and identifying device determines that the third side length and the fourth side length are both greater than the first side length and the second side length, the second scanning and identifying device sends a stop signal;

[0050] If the second scanning and identifying device determines that one of the third side length and the fourth side length is greater than the first side length and the second side length, the second scanning and identifying device sends a stop signal;

[0051] If the second scanning and identifying device determines that the third side length and the fourth side length are both smaller than the first side length and the second side length, the second scanning and identifying device sends a release signal.

[0052] Compared with the prior art, the present invention has the following advantages: IRT is to judge whether there is a gap area in the cigarette stack by the brightness change in the image. It can be understood that, when the light is sufficient, the brightness of the cigarette outer packaging (generally a cardboard box) is relatively large, and if there is a gap between the cigarette outer packaging, the brightness of the gap area is relatively low due to the shielding of the cigarette outer packaging itself to the light, so it can be judged whether there is a gap area in the cigarette stack by the brightness change in the image. However, after our research, it was found that when the forklift passes through the scanning point, there is occasionally a situation where the parts on the shelf or the forklift block the light, thereby casting a shadow on the cigarette outer packaging. At this time, there is no gap between the cigarette outer packaging, but the system mistakenly judges the shadow projected by the shelf or the forklift on the cigarette outer packaging as the gap area between the cigarette outer packaging, which will cause a false alarm at this time, thereby causing the forklift driver to stop the car by mistake. This affects the work efficiency. The method of the present invention is intended to solve the problems of the prior art and reduce the false alarm rate. BRIEF DESCRIPTION OF THE DRAWINGS

[0053] Figure 1 It is a method flow chart of an embodiment of the present invention.

[0054] Figure 2 Schematic diagram of the orientation of the gap-like region according to an embodiment of the present invention.

[0055] Figure 3 It is a schematic diagram of the change in orientation of a gap-like region according to an embodiment of the present invention.

[0056] Figure 4 It is a schematic diagram of the change in orientation of a gap-like region according to another embodiment of the present invention.

[0057] Figure 5 It is a schematic diagram of determining whether to send a release signal based on a first size and a second size according to an embodiment of the present invention. DETAILED DESCRIPTION

[0058] The specific implementation modes of the present invention are described in detail below in conjunction with the accompanying drawings, but it should be understood that the protection scope of the present invention is not limited by the specific implementation modes.

[0059] The existing system has the defect of false alarm, which causes the forklift driver to park incorrectly. The specific analysis is as follows: IRT is to judge whether there is a gap area in the cigarette stack by the brightness change in the image. It can be understood that when there is sufficient light, the brightness of the cigarette outer packaging (generally a cardboard box) is relatively large, and if there is a gap between the cigarette outer packaging, the brightness of the gap area is low due to the blocking of light by the cigarette outer packaging itself, so it can be judged by the brightness change in the image whether there is a gap area in the cigarette stack. However, after our research, it was found that when the forklift passes through the scanning point, there is occasionally a situation where the parts on the shelf or forklift block the light, thereby casting a shadow on the cigarette outer packaging. At this time, there is no gap between the cigarette outer packaging, but the system mistakenly judges the shadow projected by the shelf or forklift on the cigarette outer packaging as the gap area between the cigarette outer packaging, which will cause a false alarm, thereby causing the forklift driver to park incorrectly. This affects the work efficiency. The method of the present invention is intended to solve the problems of the prior art and reduce the false alarm rate.

[0060] Example 1

[0061] Figure 1 1 is a method flow chart of an embodiment of the present invention. As shown in the figure, the method of the present invention includes:

[0062] Step 1: The first scanning and identification device scans the RFID chip of the cargo stack at the first scanning point to obtain cargo batch information; in one example, the scanning and identification device has RFID reading capability, and the RFID chip and its reading and writing technology are well-known technologies in the art and will not be described in detail here. The scanning and identification device includes an image recognition module based on DSP, and the structure of the DSP includes: an image receiving unit: receiving data from the camera; an image preprocessing unit: calling the system loader built into the DSP chip to preprocess the image data in the memory; a start processing instruction unit: parsing the image task command and selecting the action to be performed; a data processing unit: completing different image operations according to the instructions to generate the expected image output. The specific image recognition algorithm is well-known technology in the art and will not be described in detail here. The cargo batch information can be the ID of the batch of cargo.

[0063] Step 2: The first scanning and identifying device acquires a first image of the cargo stack at the first scanning point; an example of a cargo stack is a cigarette stack. In the present invention, for the convenience of introducing the technical solution, it is assumed that the scanning and identifying device is set above the cigarette stack, and the image acquired by the scanning and identifying device is a top view of the cargo stack. It is understandable that if the scanning and identifying device acquires a left view, a right view or a monitoring view of the cargo stack, the method and concept of the present invention can also be applied.

[0064] Step 3: The first scanning and identifying device identifies whether there is a gap-like area in the cargo stack based on the first image; in the present invention, the area with lower brightness identified by the scanning and identifying device may be the gap area between the outer packaging of the cargo, or it may be the shadow cast by the shelf or forklift on the outer packaging of the cargo. Therefore, the gap area identified in the current step is only a gap-like area. Whether the gap-like area is the real gap area between the outer packaging of the cargo, or the shadow cast by the shelf or forklift on the outer packaging of the cargo, needs to be further determined in subsequent steps. Therefore, the area identified in this step is called a "gap-like area".

[0065] Step 4: If the first scanning and identifying device identifies the presence of a gap-like area in the cargo stack, the first scanning and identifying device activates the second scanning point; in one example, the first scanning point is a normally open scanning point, that is, the scanning and identifying device at the first scanning point is always on, and the scanning and identifying device at the first scanning point will check every batch of cargo that passes by. The second scanning point is only activated according to the instruction of the first scanning and identifying device, that is, the scanning and identifying device at the second scanning point is only turned on according to the instruction of the first scanning and identifying device, and only the cargo with the ID of the batch of cargo is checked. In addition, the distance between the first scanning point and the second scanning point should be smaller than the distance between the first scanning point and the normally open scanning point adjacent to it.

[0066] Step 5: The first scanning and identifying device determines the first orientation and the first size of the gap-like area, and sends the first orientation and the first size to the second scanning and identifying device, wherein the second scanning and identifying device is located at the second scanning point. It is understandable that the first scanning and identifying device can also send the ID of the batch of goods to the second scanning and identifying device while sending the first orientation and the first size to the second scanning and identifying device. Figure 2 Introduce the concept of orientation of gap-like regions. Figure 2 As shown, when the first scanning and identifying device takes a bird's-eye view of the cargo stack, it may identify a gap-like area (black area in the figure) between the first and second cargo outer packaging. This gap-like area may be the gap area between the cargo outer packaging, or it may be the shadow cast by the shelf or forklift on the cargo outer packaging. It should be understood that Figure 2 The gap-like area is enlarged for the purpose of clear illustration. The actual gap area is larger than Figure 2In addition, even if the gap-like area is a gap area between the outer packaging of goods, since there is a third outer packaging of goods on the right side of the second outer packaging of goods, the right edge of the second outer packaging of goods may be deformed due to the compression between the second outer packaging of goods and the third outer packaging of goods. Therefore, even if there is a gap area from upper left to lower right between the first and second outer packaging of goods, the right edge of the second outer packaging of goods may still remain vertical (rather than becoming a slanted line from upper left to lower right). Figure 2 In the example, the first orientation of the gap-like region changes from Figure 2 From top left to bottom right in .

[0067] Example 2

[0068] In embodiment 2, the method further comprises:

[0069] The second scanning and identification device scans the RFID chip of the cargo stack at the second scanning point to obtain the cargo batch information; the second scanning and identification device calls the first orientation and the first size based on the cargo batch information; in one example, the second scanning and identification device calls the first orientation and the first size based on the ID of the scanned batch of cargo. The second scanning and identification device obtains the second image of the cargo stack at the second scanning point; the second scanning and identification device identifies whether there is a quasi-gap area in the cargo stack based on the second image. If the second scanning and identification device identifies that there is no quasi-gap area in the cargo stack, the second scanning and identification device sends a release signal. It should be understood that if the quasi-gap area identified at the first scanning point is the shadow cast by the shelf or forklift on the outer packaging of the cargo, the shadow cast by the shelf or forklift on the outer packaging of the cargo may disappear due to the change in the position of the forklift. At this time, at the second scanning point, the second scanning and identification device is unable to identify the quasi-gap area in the cargo stack. At this time, it is obvious that the quasi-gap area identified at the first scanning point is not the gap area between the outer packaging of the cargo. Therefore, the second scanning and identification device can directly send a release signal, reducing the probability of wrong parking.

[0070] Example 3

[0071] In embodiment 3, the method further comprises:

[0072] If the second scanning and identifying device identifies that there is a gap-like region in the cargo stack, the second scanning and identifying device determines the second orientation and the second size of the gap-like region; the second scanning and identifying device determines whether the first orientation is consistent with the second orientation; if the second scanning and identifying device determines that the first orientation is inconsistent with the second orientation, the second scanning and identifying device sends a release signal; examples of changes in the orientation of the gap-like region can be found in Figure 3 .exist Figure 3 For the purpose of clarity, only the gap-like area is shown, and the outer packaging of the goods is not shown. Figure 3 As shown, the first orientation of the gap-like area identified at the first scanning point is from the upper left to the lower right, while the second orientation of the gap-like area identified at the second scanning point is from the upper right to the lower left. According to the background data of the warehouse management system we retrieved, the gap area that actually exists between the outer packaging of the goods has the same orientation at all scanning points, and the orientation of the gap area does not change between scanning points. Therefore, it can be determined that the change in orientation of the gap-like area is due to the change in the angle of light, which causes the change in the orientation of the shadow cast by the shelf or forklift on the outer packaging of the goods. Therefore, the second scanning and identification device can directly issue a release signal, reducing the probability of incorrect parking. Another example of a change in the orientation of a gap-like area can be seen in Figure 4 . The first orientation of the gap-like area identified at the first scanning point is from the upper left to the lower right, and the second orientation of the gap-like area identified at the second scanning point is also from the upper left to the lower right, but the degree from the upper left to the lower right of the gap-like area identified at the second scanning point is much higher than the degree from the upper left to the lower right of the gap-like area identified at the first scanning point. In other words, if the angle change of the gap-like area is too large, it is generally considered that the first orientation is inconsistent with the second orientation. As for what kind of angle change can be considered as an angle change that is too large, this can be determined based on inventory history data. Generally speaking, an angle change of more than 10° can be considered to be an angle change that is too large. If the second scanning and identification device determines that the first orientation is consistent with the second orientation, the second scanning and identification device determines whether to issue a release signal based on the first size and the second size.

[0073] Example 4

[0074] In Embodiment 4, the first dimension includes a first side length and a second side length, wherein the first side length and the second side length are the lengths of the two shorter sides of the slit-like region, respectively; wherein the second dimension includes a third side length and a fourth side length, wherein the third side length and the fourth side length are the lengths of the two shorter sides of the slit-like region, respectively; examples of the first-fourth side lengths can be found in Figure 5 .exist Figure 5 In the figure, the trapezoid on the left is the gap-like region identified at the first scanning point. When scanning at the second scanning point, there are three possible gap-like regions identified, so three trapezoids are shown on the right side of the figure. The first side length and the second side length correspond to Figure 5 The upper and lower sides of the trapezoid on the left. Figure 5 The two longer sides of the trapezoid on the left are obviously the edges of the outer packaging of the goods. The third and fourth sides refer to Figure 5 The upper and lower sides of any trapezoid on the right side.

[0075] Wherein, the second scanning and recognition device determines whether to issue a release signal based on the first size and the second size, including: the second scanning and recognition device determines whether to issue a release signal based on the first side length, the second side length, the third side length and the fourth side length. The second scanning and recognition device determines whether to issue a release signal based on the first side length, the second side length, the third side length and the fourth side length, including: if the second scanning and recognition device determines that the third side length and the fourth side length are both greater than the first side length and the second side length, the second scanning and recognition device issues a stop signal; if the second scanning and recognition device determines that one of the third side length and the fourth side length is greater than the first side length and the second side length, the second scanning and recognition device issues a stop signal; if the second scanning and recognition device determines that the third side length and the fourth side length are both less than the first side length and the second side length, the second scanning and recognition device issues a release signal. Figure 5 As shown, when scanning at the second scanning point, there are three possibilities for the identified gap-like regions. The first possibility is as follows: Figure 5 As shown in the trapezoid on the upper right, the third and fourth sides are both greater than the first and second sides. This change in the size of the quasi-gap area is most likely due to the gap area between the outer packaging of the goods being larger and larger due to the vibration of the forklift. It is precisely because the way this type of gap area changes is most likely due to the gap area between the outer packaging of the goods being larger and larger due to the vibration of the forklift that it can be determined that the quasi-gap area is the gap area between the outer packaging of the goods, rather than the shadow cast by the shelf or forklift on the outer packaging of the goods. Therefore, in this case, a stop signal should be issued so that the forklift driver can get off and check. The second possibility is as follows Figure 5 As shown in the trapezoid in the middle of the right side, Figure 5 The bottom side of the trapezoid in the middle on the right is Figure 5 The bottom side of the left trapezoid becomes larger, and Figure 5 The upper side of the middle trapezoid on the right is Figure 5 The lower side of the left trapezoid becomes smaller. This size change is most likely caused by the gap area between the outer packaging of the goods being larger and larger due to the vibration of the forklift. Therefore, it can be determined that the gap-like area is the gap area between the outer packaging of the goods, rather than the shadow cast by the shelf or forklift on the outer packaging of the goods. Therefore, in this case, a stop signal should be issued so that the forklift driver can get off and check. The second possibility is as follows Figure 5 As shown in the trapezoid at the bottom right, Figure 5 The bottom side of the rightmost trapezoid is Figure 5 The bottom side of the left trapezoid becomes smaller. Figure 5 The upper side of the lower right trapezoid is Figure 5The upper side of the left trapezoid becomes smaller. Based on the basic principle of entropy increase, the gaps between the goods will only develop in the direction of increasing. It is impossible for the gaps to become smaller and smaller and eventually disappear automatically as the forklift vibrates. Therefore, it can be determined that the gap-like area is the shadow cast by the shelf or forklift on the outer packaging of the goods, so a release signal is issued.

[0076] Example 5

[0077] The present invention provides an automatic inventory counting device based on IRT and RFID, and the device includes a module for performing the following operations: a first scanning and identifying device scans an RFID chip of a stack of goods at a first scanning point to obtain goods batch information; the first scanning and identifying device acquires a first image of the stack of goods at the first scanning point; the first scanning and identifying device identifies whether there is a quasi-gap area in the stack of goods based on the first image; if the first scanning and identifying device identifies that there is a quasi-gap area in the stack of goods, the first scanning and identifying device activates a second scanning point; and the first scanning and identifying device determines a first orientation and a first size of the quasi-gap area, and the first scanning and identifying device sends the first orientation and the first size to a second scanning and identifying device, wherein the second scanning and identifying device is located at the second scanning point.

[0078] Furthermore, the device also includes a module for performing the following operations: the second scanning and identifying device scans the RFID chip of the cargo stack at the second scanning point to obtain cargo batch information; the second scanning and identifying device calls the first orientation and the first size based on the cargo batch information; the second scanning and identifying device acquires the second image of the cargo stack at the second scanning point; the second scanning and identifying device identifies whether there is a gap-like region in the cargo stack based on the second image. If the second scanning and identifying device identifies that there is no gap-like region in the cargo stack, the second scanning and identifying device sends a release signal.

[0079] Furthermore, the device also includes a module for performing the following operations: if the second scanning and identification device identifies the presence of a gap-like area in the stack of goods, the second scanning and identification device determines the second orientation and the second size of the gap-like area; the second scanning and identification device determines whether the first orientation is consistent with the second orientation; if the second scanning and identification device determines that the first orientation is inconsistent with the second orientation, the second scanning and identification device issues a release signal; if the second scanning and identification device determines that the first orientation is consistent with the second orientation, the second scanning and identification device determines whether to issue a release signal based on the first size and the second size.

[0080] Further, the first size includes a first side length and a second side length, wherein the first side length and the second side length are the lengths of the two shorter sides of the gap-like area, respectively; wherein the second size includes a third side length and a fourth side length, wherein the third side length and the fourth side length are the lengths of the two shorter sides of the gap-like area, respectively; wherein, determining by the second scanning and identification device whether to issue a release signal based on the first size and the second size includes: determining by the second scanning and identification device whether to issue a release signal based on the first side length, the second side length, the third side length and the fourth side length.

[0081] Furthermore, the second scanning and identification device determines whether to issue a release signal based on the first side length, the second side length, the third side length and the fourth side length, including: if the second scanning and identification device determines that the third side length and the fourth side length are both greater than the first side length and the second side length, the second scanning and identification device issues a stop signal; if the second scanning and identification device determines that one of the third side length and the fourth side length is greater than the first side length and the second side length, the second scanning and identification device issues a stop signal; if the second scanning and identification device determines that the third side length and the fourth side length are both less than the first side length and the second side length, the second scanning and identification device issues a release signal.

[0082] It should be understood that the above specific embodiments of the present invention are only used to illustrate or explain the principles of the present invention, and do not constitute a limitation of the present invention. Therefore, any modifications, equivalent substitutions, improvements, etc. made without departing from the spirit and scope of the present invention should be included in the protection scope of the present invention. In addition, the appended claims of the present invention are intended to cover all changes and modifications that fall within the scope and boundaries of the appended claims, or the equivalent forms of such scope and boundaries.

Claims

1. An automatic inventory counting method based on IRT and RFID, characterized in that: The method comprises: The first scanning and identifying device scans the RFID chip of the cargo stack at the first scanning point to obtain cargo batch information; A first scanning and identifying device acquires a first image of the stack of goods at the first scanning point; Using a first scanning and identifying device to identify whether there is a gap-like region in the stack of goods based on the first image; If the first scanning and identifying device identifies that there is a gap-like area in the stack of goods, the first scanning and identifying device activates the second scanning point; and The first scanning and identifying device determines a first orientation and a first size of the gap-like area, and sends the first orientation and the first size to a second scanning and identifying device, wherein the second scanning and identifying device is located at the second scanning point.

2. The method of claim 1, wherein: The method further comprises: The second scanning and identifying device scans the RFID chip of the cargo stack at the second scanning point to obtain cargo batch information; The second scanning and identifying device calls the first orientation and the first size based on the cargo batch information; The second scanning and identifying device acquires a second image of the stack of goods at the second scanning point; Using a second scanning and identifying device to identify whether the gap-like region exists in the stack of goods based on the second image; If the second scanning and identifying device identifies that the gap-like region does not exist in the stack of goods, the second scanning and identifying device sends a release signal.

3. The method of claim 2, wherein: The method further comprises: If the second scanning and identifying device identifies that the gap-like region exists in the stack of goods, the second scanning and identifying device determines a second orientation and a second size of the gap-like region; determining, by a second scanning and identifying device, whether the first orientation is consistent with the second orientation; If the second scanning and identifying device determines that the first orientation is inconsistent with the second orientation, the second scanning and identifying device sends a release signal; If the second scanning and identifying device determines that the first orientation is consistent with the second orientation, the second scanning and identifying device determines whether to issue a release signal based on the first size and the second size.

4. The method of claim 3, wherein: The first size includes a first side length and a second side length, wherein the first side length and the second side length are the side lengths of the two shorter sides of the slit-like region, respectively; wherein the second size includes a third side length and a fourth side length, wherein the third side length and the fourth side length are the side lengths of the two shorter sides of the slit-like region, respectively; The second scanning and identifying device determining whether to issue a release signal based on the first size and the second size includes: The second scanning and identifying device determines whether to issue a release signal based on the first side length, the second side length, the third side length and the fourth side length.

5. The method of claim 4, wherein: The second scanning and identifying device determines whether to issue a release signal based on the first side length, the second side length, the third side length, and the fourth side length, including: If the second scanning and identifying device determines that the third side length and the fourth side length are both greater than the first side length and the second side length, the second scanning and identifying device sends a stop signal; If the second scanning and identifying device determines that one of the third side length and the fourth side length is greater than the first side length and the second side length, the second scanning and identifying device sends a stop signal; If the second scanning and identifying device determines that the third side length and the fourth side length are both smaller than the first side length and the second side length, the second scanning and identifying device sends a release signal.

6. An automatic inventory counting device based on IRT and RFID, characterized in that: The apparatus includes modules for performing the following operations: The first scanning and identifying device scans the RFID chip of the cargo stack at the first scanning point to obtain cargo batch information; A first scanning and identifying device acquires a first image of the stack of goods at the first scanning point; Using a first scanning and identifying device to identify whether there is a gap-like region in the stack of goods based on the first image; If the first scanning and identifying device identifies that there is a gap-like area in the stack of goods, the first scanning and identifying device activates the second scanning point; as well as The first scanning and identifying device determines a first orientation and a first size of the gap-like area, and sends the first orientation and the first size to a second scanning and identifying device, wherein the second scanning and identifying device is located at the second scanning point.

7. The device according to claim 6, wherein: The apparatus also includes a module for performing the following operations: The second scanning and identifying device scans the RFID chip of the cargo stack at the second scanning point to obtain cargo batch information; The second scanning and identifying device calls the first orientation and the first size based on the cargo batch information; The second scanning and identifying device acquires a second image of the stack of goods at the second scanning point; Using a second scanning and identifying device to identify whether the gap-like region exists in the stack of goods based on the second image; If the second scanning and identifying device identifies that the gap-like region does not exist in the stack of goods, the second scanning and identifying device sends a release signal.

8. The device according to claim 7, wherein: The apparatus also includes a module for performing the following operations: If the second scanning and identifying device identifies that the gap-like region exists in the stack of goods, the second scanning and identifying device determines a second orientation and a second size of the gap-like region; determining, by a second scanning and identifying device, whether the first orientation is consistent with the second orientation; If the second scanning and identifying device determines that the first orientation is inconsistent with the second orientation, the second scanning and identifying device sends a release signal; If the second scanning and identifying device determines that the first orientation is consistent with the second orientation, the second scanning and identifying device determines whether to issue a release signal based on the first size and the second size.

9. The device of claim 8, wherein: The first size includes a first side length and a second side length, wherein the first side length and the second side length are the side lengths of the two shorter sides of the slit-like region, respectively; wherein the second size includes a third side length and a fourth side length, wherein the third side length and the fourth side length are the side lengths of the two shorter sides of the slit-like region, respectively; The second scanning and identifying device determining whether to issue a release signal based on the first size and the second size includes: The second scanning and identifying device determines whether to issue a release signal based on the first side length, the second side length, the third side length and the fourth side length.

10. The device of claim 9, wherein: The second scanning and identifying device determines whether to issue a release signal based on the first side length, the second side length, the third side length, and the fourth side length, including: If the second scanning and identifying device determines that the third side length and the fourth side length are both greater than the first side length and the second side length, the second scanning and identifying device sends a stop signal; If the second scanning and identifying device determines that one of the third side length and the fourth side length is greater than the first side length and the second side length, the second scanning and identifying device sends a stop signal; If the second scanning and identifying device determines that the third side length and the fourth side length are both smaller than the first side length and the second side length, the second scanning and identifying device sends a release signal.

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