Packet exception handling methods and systems

Abstract

This invention discloses a method and system for handling package loading anomalies. The method involves, after the nth package is loaded onto a linear narrow-band sorting machine, before it moves to the first sorting slot, determining, based on the detection signal from an anomaly detection sensor, whether the narrow-band cart actually containing the nth package matches a previously matched narrow-band cart. The previously matched narrow-band cart is the one matched before the nth package was loaded onto the linear narrow-band sorting machine, where n is a positive integer. If yes, the previously matched narrow-band cart is controlled to sort the nth package; otherwise, the narrow-band cart actually containing the nth package is controlled to sort the nth package. This invention calibrates and confirms the cart position information for each package, thereby controlling the correct narrow-band cart for sorting, effectively solving the problem of packages falling onto the wrong cart, leading to incorrect or invalid sorting, and ensuring the accuracy and reliability of sorting.

Description

Technical Field

[0001] This invention relates to the field of logistics sorting, and in particular to a method and system for handling package loading anomalies. Background Technology

[0002] Linear narrow-strip sorting systems are widely used logistics sorting equipment, such as... Figure 1 As shown, it typically includes a linear narrow strip sorter 100 and an inlet conveyor 200 connected to one end of the linear narrow strip sorter. The inlet conveyor 200 is located above the conveying surface of the linear narrow strip sorter 100, so that the packages it outputs fall onto the narrow strip trolley 110 of the linear narrow strip sorter 100.

[0003] When a conventional linear narrow belt sorting system is in operation, each package is matched with a set of narrow belt carts before it falls into the linear narrow belt sorter from the inlet conveyor 200. Under normal circumstances, the package will enter the matched narrow belt cart.

[0004] However, in actual operation, it was found that because there is a certain height difference between the output end of the inlet conveyor 200 and the conveyor surface of the linear narrow belt sorter 100, the packages may tip over or over when they fall onto the conveyor surface of the linear narrow belt sorter. This may result in the packages not falling accurately onto the previously matched narrow belt trolley. When sorting is required later, if the previously matched narrow belt trolley is still started for sorting, the packages may not be sorted effectively or may be sorted incorrectly. Summary of the Invention

[0005] The purpose of this invention is to solve the above-mentioned problems existing in the prior art and to provide a method and system for handling packet anomalies.

[0006] The objective of this invention is achieved through the following technological invention:

[0007] The method for handling package defects is applied to a linear narrow-band sorting system.

[0008] After the nth package is placed on the linear narrow strip sorting machine, before moving to the first sorting slot, the detection signal of the anomaly detection sensor determines whether the narrow strip cart where the nth package is actually located is consistent with the previously matched narrow strip cart. The previously matched narrow strip cart is the narrow strip cart matched before the nth package is placed on the linear narrow strip sorting machine, where n is a positive integer.

[0009] When it is determined that the narrow-band cart where the nth package is actually located is the same as the previously matched narrow-band cart, the previously matched narrow-band cart is controlled to sort the nth package.

[0010] When it is determined that the narrow-band cart actually containing the nth package is different from the previously matched narrow-band cart, the narrow-band cart actually containing the nth package is controlled to sort the nth package.

[0011] Preferably, when the nth package passes a tracking sensor, the previously matched narrowband vehicle is determined based on the measured length of the nth package.

[0012] Preferably, when the nth package moves to the set position, the standard position tracking data of the nth package when it moves from the set position to the position that triggers the anomaly detection sensor is determined; the set position is any position between the position where the nth package triggers the tracking sensor and the output end of the inlet conveyor;

[0013] When the actual location tracking data of the nth package when it moves from the set position to the point where the anomaly detection sensor is triggered is inconsistent with the standard location tracking data, it is determined that the narrowband vehicle in which the nth package is actually located is inconsistent with the previously matched narrowband vehicle.

[0014] Preferably, starting from the second package entering the linear narrow strip sorting machine, it is determined whether the distance between the current package that triggers the anomaly detection sensor and the previous package is greater than a set value.

[0015] If so, determine whether the narrow-band cart actually containing the package is the same as the previously matched narrow-band cart;

[0016] If not, control the linear narrow strip sorter to sort the package and the previous package into the abnormal compartment or output it from its end.

[0017] Preferably, the set value is the intercept of the narrowband vehicle.

[0018] Preferably, when it is determined that the narrowband cart where the nth package is actually located is inconsistent with the previously matched narrowband cart, it is determined whether the position difference between the narrowband cart where the nth package is actually located and the previously matched narrowband cart exceeds a threshold.

[0019] If not, when it is determined that the nth package meets the sorting conditions, control the narrow-belt cart where the package is actually located to sort the nth package;

[0020] If so, mark the nth and n+1th packages as abnormal items and upload the data to the WCS system, and control the narrow-band straight-line sorting machine to output the nth and n+1th packages from its end.

[0021] Preferably, the threshold Th = L + S;

[0022] Where L is the length measured when the nth package passes the tracking sensor; S is a set value or the distance between the (n+1)th package and the nth package in front of it, determined when the tracking sensor is triggered by the (n+1)th package.

[0023] Preferably, when it is determined that the narrow-strip cart where the nth package is actually located is inconsistent with the previously matched narrow-strip cart, or when it is determined that the position difference between the narrow-strip cart where the nth package is actually located and the previously matched narrow-strip cart does not exceed a threshold, it is determined whether the length measured when the nth package passes the anomaly detection sensor is greater than the maximum value of the length, width, and height of the nth package obtained earlier. If so, the nth and n+1th packages are marked as abnormal items and the data is uploaded to the WCS system, and the narrow-strip linear sorting machine is controlled to output the nth and n+1th packages from its end.

[0024] If not, when it is determined that the nth package meets the sorting conditions, the narrow-belt cart where the package is actually located is controlled to sort the nth package.

[0025] Preferably, the distance from the anomaly detection sensor to the first sorting slot is not less than the entrance width of the sorting slot.

[0026] The package defect handling system is applied to a linear narrow strip sorting system, including...

[0027] The judgment unit is used to determine, based on the detection signal of the anomaly detection sensor, whether the narrow strip cart actually where the nth package is located is consistent with the previously matched narrow strip cart after the package is wrapped on the linear narrow strip sorting machine and before it moves to the first sorting slot. The previously matched narrow strip cart is the narrow strip cart matched before the nth package is wrapped on the linear narrow strip sorting machine, where n is a positive integer.

[0028] The normal sorting control unit is used to determine that the narrow-band cart where the nth package is actually located is consistent with the previously matched narrow-band cart, and control the previously matched narrow-band cart to sort the nth package.

[0029] An abnormal sorting control unit is used to control the narrow belt cart that actually contains the nth package to sort the nth package when it is determined that the narrow belt cart in which the nth package is actually located is inconsistent with the previously matched narrow belt cart.

[0030] The advantages of this invention are mainly reflected in:

[0031] This invention sets up an anomaly detection sensor at the entrance of the linear narrow strip sorter to calibrate and confirm the position information of the corresponding narrow strip trolley for each package. This enables the correct narrow strip trolley to be controlled for sorting, effectively solving the problem of packages tipping or rolling when being introduced into the linear narrow strip sorter, resulting in incorrect or invalid sorting. This ensures the accuracy and reliability of sorting.

[0032] This invention also reconfirms the spacing between packages at the entrance of the linear narrow-strip sorting machine, which can effectively prevent packages from tipping over or rolling and causing the spacing between packages to be too small, thus affecting sorting. This further improves the accuracy of sorting and makes it easier to control the spacing between packages to be even smaller, thereby improving the sorting efficiency of the entire system.

[0033] When the location of the narrow-band cart corresponding to a package is confirmed to be abnormal, the present invention analyzes the data to ensure that packages with a location error within a certain range can be sorted by the narrow-band cart in which they are actually located, while packages that are out of range are marked and can be returned when the spacing is confirmed, thus further avoiding incorrect sorting and ensuring sorting accuracy.

[0034] The present invention further enhances the length comparison process, which can effectively avoid the problem of not being able to determine the actual location of the next package in the narrow strip carriage and the spacing confirmation after the package rolls over and comes into contact with the next package. Attached Figure Description

[0035] Figure 1 This is a partial schematic diagram of a conventional linear narrow strip sorting system described in the background section of this invention (the arrows in the diagram indicate the conveying direction wrapped around the linear narrow strip sorter).

[0036] Figure 2 This is a top view of the linear narrow strip sorting system of the present invention;

[0037] Figure 3 This is a schematic diagram of the first process of the method of the present invention;

[0038] Figure 4 This is a schematic diagram of the second process of the method of the present invention;

[0039] Figure 5 This is a schematic diagram of the third process of the method of the present invention. Detailed Implementation

[0040] The objectives, advantages, and features of this invention will be illustrated and explained through the following non-limiting description of preferred embodiments. These embodiments are merely typical examples of the application of the present invention, and any technical inventions formed by equivalent substitutions or equivalent transformations fall within the scope of protection claimed by this invention.

[0041] In the description of the invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "front," "rear," "vertical," "horizontal," "inner," and "outer," etc., indicating orientation or positional relationships, are based on the orientation or positional relationships shown in the accompanying drawings and are only for ease of description and simplification. They do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as limiting the invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. Also, in the description of the invention, with the operator as a reference, the direction closer to the operator is the proximal end, and the direction farther from the operator is the distal end.

[0042] Example 1

[0043] The following description, in conjunction with the accompanying drawings, illustrates the method for handling package defects disclosed in this invention, applied to a linear narrow-band sorting system, as shown in the attached drawings. Figure 2 As shown, the linear narrow strip sorting system includes a linear narrow strip sorter 100, which can be a structure disclosed in the prior art, such as those disclosed in patent applications with application numbers 202120128293.7, 202121454519.9, 202210085573.3, 202111562703.X, 202110761468.2, and 202120632197.6.

[0044] As attached Figure 2 As shown, the linear narrow belt sorting machine 100 has sorting slots 700 on both sides. The specific sorting principle of the linear narrow belt sorting machine 100 is similar to that of the cross belt sorting machine. The difference is that when the linear narrow belt sorting machine 100 sorts, the package may occupy multiple narrow belt carts 110. When the package occupying multiple narrow belt carts moves to its corresponding target sorting slot with the narrow belt cart, the multiple narrow belt carts start at the same time to transfer the package to the target sorting slot.

[0045] As attached Figure 2As shown, one end of the linear narrow-strip sorting machine 100 is connected to an inlet conveyor 200. The inlet conveyor 200 is located above the conveying surface of the linear narrow-strip sorting machine 100, so that the packages output by it fall onto the narrow-strip cart 110 of the linear narrow-strip sorting machine 100. The input end of the inlet conveyor 200 is connected to the DWS conveyor line 300. After the package passes through the DWS conveyor line 300, its sorting route information is obtained. The sorting route information includes the target sorting slot where the package should be sorted. The DWS conveyor line 300 is a known device with functions such as barcode scanning, weighing, and package size measurement. The DWS conveyor line 300 preferably adopts a six-sided barcode scanning structure for barcode reading. Its specific structure can be the structure disclosed in the prior art, such as application numbers 201922222268.0 and 201922491405.0. The DWS conveyor line 300 can measure the length, width, and height of the package through a light curtain. The length, width, and height of the package measured when it passes through the DWS conveyor line are the previously measured length, width, and height.

[0046] As attached Figure 2 As shown, the input end of the DWS conveyor line 300 is connected to a transition conveyor line 400, which is preferably a belt conveyor. Its input end is connected to a single-item separation device 500, which can be a structure disclosed in existing technologies such as applications 202010150004.3, 202011025041.8, and 202120079361.5. After the packages are arranged one by one by the single-item separation device 500, they are output via a side conveyor or a center conveyor. The packages output by the single-item separation device 500 are ultimately aligned in the conveying direction. Furthermore, the single-item separation device 500 can output packages at equal intervals. The input end of the single-item separation device 500 is connected to a package feeding conveyor line 600. Of course, in some embodiments, the single-item separation device 500 and the package feeding conveyor line 600 can be omitted, and manual or robotic loading can be used.

[0047] As attached Figure 2As shown, a tracking sensor 800 is installed at the DWS conveyor line 300 or the transition conveyor line 400. The tracking sensor 800 is preferably a through-beam photoelectric sensor. When a package is conveyed past the tracking sensor 800 on the DWS conveyor line or the transition conveyor line, the tracking sensor 800 is triggered. Based on the trigger time of the tracking sensor 800, the length of the package can be measured in conjunction with the operating speed of the DWS conveyor line 300 or the transition conveyor line 400. At this point, a narrow-strip sorting cart can be matched to the package based on the measured length. The matched narrow-strip cart is the one matched previously. Simultaneously, as the package passes the tracking sensor 800, the distance between it and the package in front of it can be measured.

[0048] As attached Figure 2 As shown, an anomaly detection sensor 900 is installed at the linear narrow-belt sorting machine 100. The anomaly detection sensor 900 can be a through-beam photoelectric sensor, positioned between the output end of the inlet conveyor 200 and the first sorting slot. More preferably, the distance from the anomaly detection sensor 900 to the first sorting slot is not less than the entrance width of the sorting slot, and its distance to the inlet conveyor 200 is approximately equal to, or preferably slightly smaller than, the entrance width of the sorting slot. When a package is conveyed by the linear narrow-belt sorting machine past the anomaly detection sensor 900, its length and the distance between it and the package in front of it can also be measured.

[0049] As attached Figure 3 As shown, the above packet exception handling method specifically includes the following steps:

[0050] After the nth package is loaded onto the linear narrow-band sorting machine, before moving to the first sorting slot, the detection signal of the anomaly detection sensor determines whether the narrow-band cart actually containing the nth package is consistent with the previously matched narrow-band cart, where n is a positive integer; the narrow-band cart actually containing the nth package is the narrow-band cart that passes through the anomaly detection sensor from the time the nth package triggers the anomaly detection sensor until it has completely passed the anomaly detection sensor.

[0051] When it is determined that the narrow-band cart where the nth package is actually located is the same as the previously matched narrow-band cart, the previously matched narrow-band cart is controlled to sort the nth package.

[0052] When it is determined that the narrow-band cart actually containing the nth package is different from the previously matched narrow-band cart, the narrow-band cart actually containing the nth package is controlled to sort the nth package.

[0053] When specifically determining whether the previously matched narrowband vehicle matches the actual narrowband vehicle, the following method should be used:

[0054] When the nth package moves to the set position, the standard position tracking data of the nth package when it moves from the set position to the point where the anomaly detection sensor is triggered is determined; the set position is any position between the position where the nth package triggers the tracking sensor and the output end of the inlet conveyor; the set position is, for example, the position of the package when the nth package triggers the tracking sensor or when the barcode information, weight information, size data or sorting route information of the nth package is obtained.

[0055] When the actual location tracking data of the nth package when it moves from the set position to the point where the anomaly detection sensor is triggered is inconsistent with the standard location tracking data, it is determined that the narrowband vehicle in which the nth package is actually located is inconsistent with the previously matched narrowband vehicle.

[0056] That is, when the actual position tracking data (pulse count or time, etc.) of the nth package moves from the current position to trigger the anomaly detection sensor is the same as the standard position tracking data, it means that the package has fallen into the previously matched narrow-band cart normally, and the sorting cart in which the package is actually located is the previously matched narrow-band cart.

[0057] When the actual location tracking data of the nth package that triggers the anomaly detection sensor is less than the standard location tracking data, meaning the nth package triggers the anomaly detection sensor earlier, the sorting cart in which it is located is in front of the sorting cart that was matched earlier (with the direction in which the straight narrow strip sorting machine is conveying as the front).

[0058] When the nth package moves from its current position to a location where the actual location tracking data that triggers the anomaly detection sensor is greater than the standard location tracking data, meaning the nth package triggers the anomaly detection sensor later, the sorting cart it is actually located on is located behind the sorting cart that was matched earlier. Actual analysis shows that the sorting cart where the package is actually located is basically located behind the sorting cart that was matched earlier.

[0059] Furthermore, during actual sorting, the spacing between packages can affect whether two packages can be sorted. For example, when two packages are on the same narrow-belt cart, if the narrow-belt cart starts sorting, it will sort both packages at the same time, which will cause one package to be missorted.

[0060] Therefore, as attached Figure 4 As shown, starting from the second package entering the linear narrow-band sorting machine, it is determined whether the distance between the current package that triggers the anomaly detection sensor and the previous package is greater than a set value, where the set value is the intercept d of the narrow-band cart. 车 The intercept d 车It is approximately the sum of the width of each narrow-band car and the spacing between adjacent cars.

[0061] If so, that is, the distance between the two packages is greater than the intercept d. 车 If two packages are not on the same narrow-band cart, the two packages can be sorted to determine whether the narrow-band cart where the package is actually located is the same as the previously matched narrow-band cart.

[0062] If not, meaning the distance between the two packages is no greater than the intercept d. 车 If two packages are on the same narrow belt trolley, they cannot be sorted. In this case, they can be directly identified as abnormal items, and the linear narrow belt sorter can be controlled to sort the package and the package preceding it to the abnormal compartment or output it from its end.

[0063] When measuring the distance between packages, when a package triggers the anomaly detection sensor, the distance between the two packages can be calculated by multiplying the time between the falling edge of the previous package and the rising edge of the current package (which can be timed by pulse counting) by the conveying speed of the linear narrow belt conveyor.

[0064] Once the sorting system is started, for the first package (a specific package) entering the linear narrow strip sorter, since there are no packages in front of it, there is no need to determine the distance between it and the packages in front of it.

[0065] Furthermore, in actual sorting, a situation often arises where, after a batch of packages exits the single-item separation device, a new batch of packages enters the device only after a certain interval. During this time, as the single-item separation device conveys the new batch of packages one by one to the matching conveyor, the distance between the first package entering the linear narrow-strip sorting section and the package preceding it (the last package in the previous batch) is very large. In this case, when the first package in the new batch triggers the anomaly detection sensor, it is not necessary to determine the distance between it and the package in front of it.

[0066] When packages are fed into the linear narrow belt sorter at relatively large intervals, normally if a package falls onto the narrow belt trolley, the distance between it and the next package will not become too small to affect their sorting. However, when packages are fed into the linear narrow belt sorter at smaller intervals, or if a package experiences significant rolling, the distance between it and the next package may become too small, affecting their sorting.

[0067] As attached Figure 5 As shown, when it is determined that the narrowband vehicle where the nth package is actually located is inconsistent with the previously matched narrowband vehicle, it is determined whether the position difference between the narrowband vehicle where the nth package is actually located and the previously matched narrowband vehicle exceeds the threshold Th.

[0068] The threshold Th = L + S, where L is the length measured when the nth package passes the tracking sensor; S is a set value or the distance between the (n+1)th package and the nth package in front of it, determined when the (n+1)th package triggers the tracking sensor.

[0069] If not, meaning the position difference does not exceed the threshold, when it is determined that the nth package meets the sorting conditions, the narrow-band trolley where the package is actually located is controlled to sort the nth package. Meeting the sorting conditions here means that: when the (n+1)th package triggers the anomaly detection sensor, the distance between the (n+1)th package and the nth package is greater than the intercept of the narrow-band trolley, and when the actual position tracking data of the nth package determines that the nth package has moved to the sorting trigger position, the narrow-band trolley where the nth package is actually located is controlled to sort the nth package. When tracking the position of each package, for example, when each package triggers the anomaly detection photoelectric sensor, the standard pulse count required for it to move from the trigger position to its target sorting slot can be determined. The actual pulse count is counted starting from when the package triggers the anomaly detection photoelectric sensor. When the actual pulse count reaches the standard pulse count, the sorting trolley where the package is actually located is controlled to start sorting. Of course, other known methods can also be used for package position tracking, which will not be elaborated here.

[0070] If the position difference exceeds the threshold, the package that triggers the anomaly detection sensor may not be the nth package, but the (n+1)th package. In this case, the nth and (n+1)th packages are marked as abnormal items and the data is uploaded to the WCS system. That is, the actual location tracking data of the nth and (n+1)th packages are marked as abnormal items and the data is uploaded to the WCS system. In the end, the narrow-strip carts where the nth and (n+1)th packages are actually located will not be started for sorting. They are output from the end of the narrow-strip linear sorting machine and enter the return line.

[0071] Of course, in actual operation of the sorting system, it is rare for the position difference to exceed the threshold. Therefore, in actual use of the sorting system, it is not necessary to make the above judgment on whether the position difference is greater than the threshold and to take corresponding actions.

[0072] Furthermore, in special cases, the nth and (n+1th)th packages may be in contact or partially overlapped. In this situation, when the anomaly detection sensor is triggered, it generates a continuous trigger signal, causing the control device to treat the nth and (n+1th)th packages as a single package. Consequently, the anomaly detection sensor will be unable to identify the leading edge of the (n+1th)th package, and the control device will be unable to determine the distance between it and the nth package in front of it, let alone whether the distance between the nth and (n+1th)th packages meets the minimum sorting distance (the intercept of the narrow-belt cart). Of course, in actual operation, this situation rarely occurs and can be left unaddressed. However, in this embodiment, appropriate handling is performed as a precaution.

[0073] Specifically, when it is determined that the narrowband vehicle where the nth package is actually located is inconsistent with the previously matched narrowband vehicle, or when it is determined that the position difference between the narrowband vehicle where the nth package is actually located and the previously matched narrowband vehicle does not exceed the threshold, it is determined whether the length of the nth package measured when it passes the anomaly detection sensor is greater than the maximum value of the length, width and height of the nth package obtained earlier.

[0074] If so, it is assumed that the nth and (n+1th)th packages are in contact or partially overlapped. Therefore, the nth and (n+1th)th packages are marked as abnormal items and the data is uploaded to the WCS system. The linear narrow strip sorter is then controlled not to sort the two packages, so that they are output from the end of the linear narrow strip sorter.

[0075] If not, that is, the end of the nth package and the front of the (n+1)th package are in a front-to-back position relationship with a gap, then when it is determined that the nth package meets the sorting conditions, the narrow-belt cart where the package is actually located is controlled to sort the nth package.

[0076] The entire operation of the sorting system is as follows: Figure 5 As shown, further details will not be elaborated here.

[0077] Example 2

[0078] This embodiment discloses a package defect handling system applied to a linear narrow strip sorting system, including:

[0079] The judgment unit is used to determine, based on the detection signal of the anomaly detection sensor, whether the narrow strip cart actually where the nth package is located is consistent with the previously matched narrow strip cart after the package is wrapped on the linear narrow strip sorting machine and before it moves to the first sorting slot. The previously matched narrow strip cart is the narrow strip cart matched before the nth package is wrapped on the linear narrow strip sorting machine, where n is a positive integer.

[0080] The normal sorting control unit is used to determine that the narrow-band cart where the nth package is actually located is consistent with the previously matched narrow-band cart, and control the previously matched narrow-band cart to sort the nth package.

[0081] An abnormal sorting control unit is used to control the narrow belt cart that actually contains the nth package to sort the nth package when it is determined that the narrow belt cart in which the nth package is actually located is inconsistent with the previously matched narrow belt cart.

[0082] This invention has many other embodiments, and all technical inventions formed by equivalent transformations or equivalent transformations fall within the protection scope of this invention.

Claims

1. A method for handling package defects, applied to a linear narrow strip sorting system, characterized in that: After the nth package is placed on the linear narrow strip sorting machine, before moving to the first sorting slot, the detection signal of the anomaly detection sensor determines whether the narrow strip cart where the nth package is actually located is consistent with the previously matched narrow strip cart. The previously matched narrow strip cart is the narrow strip cart matched before the nth package is placed on the linear narrow strip sorting machine, where n is a positive integer. When it is determined that the narrow-band cart where the nth package is actually located is the same as the previously matched narrow-band cart, the previously matched narrow-band cart is controlled to sort the nth package. When it is determined that the narrow-band cart where the nth package is actually located is inconsistent with the previously matched narrow-band cart, the narrow-band cart where the nth package is actually located is controlled to sort the nth package. When the nth package passes a tracking sensor, the previously matched narrowband vehicle is determined based on the measured length of the nth package; When the nth package moves to the set position, the standard position tracking data of the nth package when it moves from the set position to the position that triggers the anomaly detection sensor is determined; the set position is any position between the position where the nth package triggers the tracking sensor and the output end of the inlet conveyor; When the actual location tracking data of the nth package when it moves from the set position to the point where the anomaly detection sensor is triggered is inconsistent with the standard location tracking data, it is determined that the narrowband vehicle in which the nth package is actually located is inconsistent with the previously matched narrowband vehicle.

2. The method for handling package anomalies according to claim 1, characterized in that: Starting with the second package entering the linear narrow-strip sorting machine, it is determined whether the distance between the current package that triggers the anomaly detection sensor and the previous package is greater than a set value. If so, determine whether the narrow-band cart actually containing the package is the same as the previously matched narrow-band cart; If not, control the linear narrow strip sorter to sort the package and the previous package into the abnormal compartment or output it from its end.

3. The method for handling package anomalies according to claim 2, characterized in that: The set value is the intercept of the narrowband vehicle.

4. The method for handling packet anomalies according to any one of claims 1-3, characterized in that: When it is determined that the narrowband vehicle where the nth package is actually located is inconsistent with the previously matched narrowband vehicle, it is determined whether the position difference between the narrowband vehicle where the nth package is actually located and the previously matched narrowband vehicle exceeds the threshold. If not, when it is determined that the nth package meets the sorting conditions, control the narrow-belt cart where the package is actually located to sort the nth package; If so, mark the nth and n+1th packages as abnormal items and upload the data to the WCS system, and control the narrow-band straight-line sorting machine to output the nth and n+1th packages from its end.

5. The method for handling package anomalies according to claim 4, characterized in that: The threshold Th = L + S; Where L is the length measured when the nth package passes the tracking sensor; S is a set value or the distance between the (n+1)th package and the nth package in front of it, determined when the tracking sensor is triggered by the (n+1)th package.

6. The method for handling packet anomalies according to any one of claims 1-3, characterized in that: When it is determined that the narrow-strip cart where the nth package is actually located is inconsistent with the previously matched narrow-strip cart, or when it is determined that the position difference between the narrow-strip cart where the nth package is actually located and the previously matched narrow-strip cart does not exceed the threshold, it is determined whether the length measured when the nth package passes through the anomaly detection sensor is greater than the maximum value of the length, width, and height of the nth package obtained earlier. If so, the nth and n+1th packages are marked as abnormal items and the data is uploaded to the WCS system, and the narrow-strip linear sorting machine is controlled to output the nth and n+1th packages from its end. If not, when it is determined that the nth package meets the sorting conditions, the narrow-belt cart where the package is actually located is controlled to sort the nth package.

7. The method for handling package anomalies according to claim 1, characterized in that: The distance from the anomaly detection sensor to the first sorting compartment is not less than the entrance width of the sorting compartment.

8. A packing anomaly handling system for implementing the packing anomaly handling method as described in claim 1, applied to a linear narrow strip sorting system, characterized in that: include The judgment unit is used to determine, based on the detection signal of the anomaly detection sensor, whether the narrow belt cart actually containing the nth package is consistent with the previously matched narrow belt cart before it moves to the first sorting slot, after the nth package is wrapped on the linear narrow belt sorting machine. The previously matched narrow belt cart is the narrow belt cart matched before the nth package is wrapped on the linear narrow belt sorting machine, where n is a positive integer. When the nth package passes a tracking sensor, the unit determines the previously matched narrow belt cart based on the measured length of the nth package. When the nth package moves to a set position, the unit determines the standard position tracking data of the nth package from the set position to the point where the anomaly detection sensor is triggered. The set position is any position between the location where the tracking sensor is triggered by the nth package and the output end of the inlet conveyor; When the actual location tracking data of the nth package when it moves from the set position to the point where the anomaly detection sensor is triggered is inconsistent with the standard location tracking data, it is determined that the narrowband vehicle in which the nth package is actually located is inconsistent with the previously matched narrowband vehicle. The normal sorting control unit is used to determine that the narrow-band cart where the nth package is actually located is consistent with the previously matched narrow-band cart, and control the previously matched narrow-band cart to sort the nth package. An abnormal sorting control unit is used to control the narrow belt cart that actually contains the nth package to sort the nth package when it is determined that the narrow belt cart in which the nth package is actually located is inconsistent with the previously matched narrow belt cart.

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