CN115815130A - Sorting control method for multi-party information interactive tracking - Google Patents
Sorting control method for multi-party information interactive tracking Download PDFInfo
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- CN115815130A CN115815130A CN202111090154.0A CN202111090154A CN115815130A CN 115815130 A CN115815130 A CN 115815130A CN 202111090154 A CN202111090154 A CN 202111090154A CN 115815130 A CN115815130 A CN 115815130A
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Abstract
The invention discloses a sorting control method for multi-party information interactive tracking, which establishes a parcel sorting task number in the sorting process, and takes the task number as a communication mark in the communication process of a multi-party system, thereby realizing the accurate transmission of data; the traceability of the package data in a series of multi-party system communication after passing through the code reading system is ensured, so that the accuracy and stability of the routing information of the package received by the PLC system are ensured. Meanwhile, the control method supports high concurrent processing of a multi-party system, and the efficiency of data communication is remarkably improved; in addition, during the waiting routing, the influence of an interference object on a detection photoelectric sensor at the d3 position is avoided, so that the anti-interference performance and the stability of the sorting system are improved; in addition, a photoelectric sensor at the d3 position can be omitted, and equipment cost is saved.
Description
Technical Field
The invention relates to the field of logistics sorting, in particular to a sorting control method for multi-party information interactive tracking.
Background
At present, in the linear conveying and sorting system in the industry, a bag is supplied by a telescopic machine/belt conveyor, a DWS system or a six-side scanning system realizes the bar code scanning of the bag, a WCS system carries out request interaction and obtains bag routing information to a customer WMS system according to a bar code of the DWS system or the six-side scanning system, and a PLC system carries out bag tracking and controls the action of a sorting mechanism to realize the sorting of the bag according to the routing information provided by the WCS information.
As shown in fig. 1, when the system is normally started, a package passes through a distance belt conveyor, enters a scanning area of a DWS system or a six-sided scanning system, when a scanning photosensor is triggered (the position of the scanning photosensor is d 1), the DWS system or the six-sided scanning system scans, and starts to time T (S), and decoded barcode information is sent to a WCS system when time T (S) = T1; the WCS system starts timing T (W) after receiving the bar code information, the WCS system requests routing information to the customer WMS system according to the bar code information, the routing information is obtained and then is sent to the PLC system at the timing point T (W) = T2, the PLC system receives the routing information of the bar code and then stores a cache area, timing T (P) is started, T (P) does not reach T3 time, when the PLC system detects a parcel at the position d3, the parcel detected at the point is bound with the parcel routing information received by the WCS system, a parcel tracking task is established, the parcel is tracked and sorted, and if not, the time exceeds T3 time, the parcel flows back.
It can be seen that, in the whole information interaction process,
meanwhile, the field network environment ensures millisecond-level low-delay communication at d2 and d3, so that the field network environment can be usedAnd smooth communication and interaction of information at a fixed point are ensured, and finally, synchronous correspondence between the packages sensed by the PLC at the d3 and the received package routing information is ensured.
However, in the whole communication information interaction process, the decoding efficiency stability of the first code reader and the decoding efficiency stability of the code reader are influenced by the quality of the package bar code; secondly, the processing efficiency of WMS/WCS request/route acquisition is influenced by the processing efficiency of a client server and the communication quality of a client, thirdly, the stability of receiving WCS routing result information by a PLC and the communication stability of DWS/six-sided scanning and WCS are also influenced by the communication environment of a field network, and fourthly, for the d3 position, if an interferent appears and interferes with a photoelectric sensor at the position, the tracking of normal parcels is seriously influenced; the quality and stability of the whole communication are affected by the factors, and finally, the PLC system can delay receiving information at the position d3 and cannot synchronously correspond to the sensed packages; and then, when the routing information of the packages cannot be determined, the routing information of the packages before and after can be misplaced in serious conditions, so that the packages are subjected to backflow and wrong distribution.
At present, in the initial stage of equipment production, the problem is not obvious due to the updating of yield and network hardware, and the hardware system and the network condition of the system are deteriorated along with the long-term production and use of the system, so that the operation efficiency of the whole sorting system is influenced. Meanwhile, the customer operator continuously improves the sorting efficiency of the conveying and sorting system, reduces the error rate and the reflux rate, and therefore, the communication quality, stability and accuracy of the multi-party system have higher and higher requirements. For the current multi-party communication control mode, obviously, the requirements of the customer operator cannot be met.
Disclosure of Invention
The invention aims to solve the problems in the prior art and provide a sorting control method for multi-party information interaction tracking.
The purpose of the invention is realized by the following technical scheme:
the sorting control method for multi-party information interactive tracking is characterized in that: the method comprises the following steps:
s1, when a parcel triggers a scanning photoelectric sensor, a PLC system receives the signal, establishes a tracking task and a task number of the tracking task and tracks the parcel;
s2, the PLC system sends the task number to a triggered code reading system, the code reading system receives the task number, binds the task number with a decoding thread of the currently scanned package, and immediately sends the task number and a decoding result to the WCS system after decoding is completed;
s3, the WCS binds the task number with a routing request processing thread of the package bar code, and after routing information is obtained through the WMS, the task number, the bar code information and the routing information are sent to the PLC system together;
s4, the PLC system extracts a task number according to the information returned by the WCS, inquires the tracking data of the package of the task number and obtains the current position information of the package;
s5, updating the tracking data of the package again according to the routing information, and updating the sorting pulse data according to the routing information;
and S6, the PLC starts the sorting mechanism to act to sort when the sorting pulse data arrives.
Preferably, in the sorting control method with multi-party information interactive tracking, the tracking task is to determine whether the PLC receives the route information fed back by the WMS within the theoretical pulse data or the theoretical use time when the parcel moves from the scanning photosensor to the predetermined position behind the code reading mechanism after S3 and before S4 when tracking the actual pulse data or the actual use time when the parcel moves from the scanning photosensor to the predetermined position behind the code reading mechanism; if yes, executing S4; if not, the tracking data of the task number is emptied, and the package is reflowed.
Preferably, in the sorting control method based on multi-party information interactive tracking, the code reading system adopts a six-side code reading mechanism to read codes.
Preferably, in the sorting control method for mutual tracking of multi-party information, the packages are conveyed to the scanning photoelectric sensor one by one through a single-piece separating device or conveyed to the scanning photoelectric sensor one by one through a telescopic belt conveyor and a distance belt conveyor.
Preferably, in the method for controlling sorting by mutual multi-party information tracking, the sorting mechanism is a balance sorting machine.
Preferably, in the sorting control method based on mutual tracking of multi-party information, a rechecking photoelectric sensor is arranged at a conveyor in front of each balance sorting machine, the length and/or the stall condition of each parcel is analyzed through the rechecking photoelectric sensor, and sorting control is performed according to a corresponding analysis result.
Preferably, in the sorting control method with multi-party information interactive tracking, when each parcel passes through each rechecking photoelectric sensor, the PLC executes the following steps:
s10, receiving a signal when the Nth package passes through the Mth rechecking photoelectric sensor;
s20, determining the length information of the current parcel according to the current signal, comparing the length information with the length information of the current parcel measured by a rechecking photoelectric sensor or a tracking photoelectric sensor or a scanning photoelectric sensor which is arranged before the rechecking photoelectric sensor, and executing S30 when the length difference value is determined to exceed a threshold value; when it is determined that the length difference does not exceed the threshold, performing S80;
s30, determining whether a parcel before the current parcel is sorted at the balance wheel sorting machine corresponding to the current parcel, and executing S40 when the determination is negative; when the determination is yes, S50 is executed;
s40, judging whether other packages before the current package are lost or not, if not, confirming that the current rechecking photoelectric sensor is abnormal in measurement and recording abnormal conditions; if yes, judging that the packages are piled up in multiple packages, emptying tracking data of the current packages, and reflowing the packages by a control system;
s50, judging whether the previous package is successfully sorted, if so, confirming that the current rechecking photoelectric sensor is abnormal, recording abnormal measurement conditions and executing S60; if not, judging that the packages are piled with multiple packages, emptying the tracking data of the current packages, and reflowing the multiple packages by the control system;
s60, analyzing whether abnormal measurement continuously occurs or occurs in a large quantity, and if so, executing S70; if not, executing S80;
s70, controlling an alarm to alarm;
s80, confirming whether a balance wheel sorting machine behind the current rechecking photoelectric sensor is a balance wheel sorting machine corresponding to the current parcel route, and if so, executing S90; if not, executing S100;
s90, starting the balance wheel sorting machine to sort when the current parcel moves to the balance wheel sorting machine;
and S100, continuing to track the current package, and executing S20 when receiving a signal that the current package passes through the next rechecking photoelectric sensor.
Preferably, in the sorting control method for mutual tracking of multi-party information, the sorting mechanism is a balance sorting machine, each balance sorting machine has K balance sets sequentially arranged from an input end to an output end thereof, each balance set is driven to swing by a swing mechanism, and when the balance sorting machine sorts, a parcel entering the balance sorting machine moves to the outside of the balance sorting machine along a curve or a zigzag line by controlling a swing angle of each balance set.
The technical scheme of the invention has the advantages that:
the control method of the invention establishes the parcel sorting task number in the sorting system, and in the communication process of a multi-party system, the task number is used as a communication mark, and the control method does not completely depend on the decoding efficiency stability of a code reader, the WMS/WCS request/acquisition route processing efficiency and the communication environment of a field network; meanwhile, the traceability of the package data in a series of multi-party system communication after passing through the code reading system is also ensured, so that the accuracy and the stability of the routing information of the package received by the PLC system are ensured. Meanwhile, the control method supports high concurrent processing of a multi-party system, and the efficiency of data communication is remarkably improved; in addition, during the waiting for routing, the routing information is loaded by the photoelectric sensor without depending on detection, namely, the tracking and sorting are not influenced by any interferents at all, so that the anti-interference performance and the stability of the sorting system are improved; in addition, compared with the existing structure, the photoelectric sensor at the d3 position can be omitted, and the equipment cost is saved. The scheme can be used in various sorting systems, and has wide application range.
This scheme leads to and adopts balance letter sorting system to make every balance wheel group of balance letter sorting machine swing different angle when the letter sorting, make the parcel be the curvilinear path removal at the letter sorting in-process simultaneously, for every balance wheel group of current balance letter sorting machine according to unified 45 swing angle, effectively reduced the swing angle of several preceding balance wheel groups, thereby make article remove softly more and be difficult for empting, can reduce prior art effectively and receive the influence of parcel center and easily empty the problem of rolling when the swing.
This scheme is in balance carries letter sorting system, adopt the recheck photoelectric sensor before balance sorting machine, measure the recheck again to the length of each parcel, and compare with last recheck photoelectric sensor's measured data, combine the tracking data and the letter sorting result of other parcels before the present parcel of tracking, whether comprehensive analysis judges present parcel become many parcels in carrying the letter sorting in-process and pile up the state, thereby carry out special reflux processing, guarantee the letter sorting accuracy of goods, also can make statistics of and warn the unusual state of operation of equipment to a certain extent simultaneously. Due to the fact that the situation of wrong division is avoided, time consumption of abnormal processing after wrong division is avoided, field operation efficiency is improved, manual abnormal processing cost is effectively reduced, and meanwhile the running state of the device is monitored more fully.
Drawings
FIG. 1 is a diagram of time nodes in a prior art sorting system when obtaining routes as described in the background;
FIG. 2 is a schematic of the process of the present invention;
fig. 3 is a schematic view of the balance sorting system of the present invention (only one balance sorter and its one side chute are shown);
FIG. 4 is a schematic view of the balance sorting system of the present invention adjusting the swing angle of the set of pendulums to move a package in a curve;
FIG. 5 is a schematic view of a balance system of the present invention employing a single piece separating device for package separation;
fig. 6 is a flow diagram of the identification and processing of package accumulation by the balance wheel sorting system of the present invention.
Detailed Description
Objects, advantages and features of the present invention will be illustrated and explained by the following non-limiting description of preferred embodiments. These embodiments are merely exemplary embodiments applying the technical solutions of the present invention, and all technical solutions formed by adopting equivalents or equivalent changes fall within the scope of the claims of the present invention.
In the description of the schemes, it should be noted that the terms "center", "upper", "lower", "left", "right", "front", "rear", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. In the description of the embodiment, the operator is used as a reference, and the direction close to the operator is a proximal end, and the direction away from the operator is a distal end.
Example 1
The following explains the sorting control method for multi-party information interactive tracking disclosed by the present invention with reference to the accompanying drawings, as shown in fig. 2, which comprises the following steps:
s1, when a package triggers a scanning photoelectric sensor, a PLC system receives the signal, establishes a tracking task and a task number of the tracking task and tracks the package;
s2, the PLC system sends the task number to a triggered code reading system, the code reading system receives the task number, binds the task number with a decoding thread of the currently scanned package, and immediately sends the task number and a decoding result to the WCS system after decoding is completed;
s3, the WCS binds the task number with a routing request processing thread of the package bar code, and after routing information is obtained through the WMS, the task number, the bar code information and the routing information are sent to the PLC system together;
s4, the PLC system extracts a task number according to the information returned by the WCS, inquires the tracking data of the package of the task number and obtains the current position information of the package;
s5, updating the tracking data of the package again according to the routing information, and updating the sorting pulse data according to the routing information;
and S6, the PLC starts the sorting mechanism to act to sort when the sorting pulse data arrives.
In S1, when the tracking task is to track actual pulse data or actual use of a parcel moving to a predetermined position behind the code reading mechanism by the scanning photosensor, as shown in fig. 1, the predetermined position may be a d3 position (a position of the tracking photosensor) in the prior art, and of course, as shown in fig. 3, route information of the parcel may be acquired at a d4 point at the latest, where the d4 point is behind the d3 position. After S3 and before S4, whether the PLC receives the routing information fed back by the WMS in the theoretical pulse data or the theoretical time when the packages are moved to the preset position behind the code reading mechanism by the scanning photoelectric sensor is confirmed; if yes, executing S4; if not, the tracking data of the task number is cleared, and the package is reflowed.
Example 2
In this embodiment, a balance wheel conveying and sorting system is taken as an example to describe the flow before the parcel obtains the route and after the parcel goods route, as shown in fig. 3, the balance wheel sorting system includes a plurality of balance wheel sorters 10 and belt conveyors 20 which are alternately arranged, both sides of each balance wheel sorter 10 are respectively connected with a chute 70, each balance wheel sorter 10 and the chute connected therewith can be connected without a gap or with a certain interval, and a backing plate 71 is arranged at the interval.
The front end of the first belt conveyor 20 is provided with a sweep conveyor 30, which sweep conveyor 30 may be a known DWS conveyor line. Sweep a yard conveyor 30 and include two sections at least band conveyer, read a yard mechanism and trigger read a yard scanning photoelectric sensor 31 that the yard mechanism sweeps a yard, sweep a yard conveyor 30 and adopt six code reading mechanisms to acquire the route, six code reading mechanisms still are used for confirming the center of parcel (the center point of the projection of parcel on its holding surface) or the positional information of X axle central line (the center of crossing the parcel and with X axle direction vertical line) on the DWS transfer chain simultaneously. The code scanning and conveying device 30 adopting the six-side code reading mechanism is a known technology and is not described in detail here, the input end of the code scanning and conveying device 30 is connected with the distance-measuring conveyor 40, and the input end of the distance-measuring conveyor 40 is connected with the telescopic belt conveyor 60.
The detailed structures of the balance wheel sorter 10, the belt conveyor 20, the code scanning conveyor 30, the span conveyor 40 and the telescopic belt conveyor 60 are known in the art and will not be described herein. And a rechecking photoelectric sensor 50 is provided at each of the belt conveyors 20. The rechecking photosensor 50 can be used to determine the stall condition during the delivery of the package, thereby facilitating more accurate control of the start time of the balance sorter, as well as facilitating determination of the balance sorter to which the route of the package corresponds.
Before entering the code scanning conveying device 30, the packages are guided into the telescopic belt conveyor 60 by manual or automatic equipment, the telescopic belt conveyor 60 conveys the packages to the distance conveyor 40 one by one, the distance conveyor 40 conveys the packages to the code scanning conveying device 30 after the packages are separated by a longitudinal distance, and the packages acquire a route when triggering the scanning photoelectric sensor 31.
As shown in fig. 4, each balance sorting machine 10 has K balance sets arranged in sequence from its input end 101 to its output end 102, the sequence numbers of the balance sets are 1, 2, 3, … … K in sequence, and K is an integer between 5 and 10. A balance set typically comprises two rows of balances, although it may be 1 or more rows; each oscillating wheel set is driven by an oscillating mechanism to oscillate, the oscillating mechanism generally comprises a motor and a transmission mechanism connected between the balance sorting unit and the motor, and the specific structure of the oscillating mechanism is known in the art and is not described herein.
When the balance wheel sorting machine 10 sorts, at least part of the balance wheel sets are swung by different angles by controlling the swinging angles of the balance wheel sets, so that packages entering the balance wheel sorting machine 10 are flexibly sorted to the outer side of the balance wheel sorting machine 10 along a curve or a zigzag line, the swinging angles of the balance wheels can be effectively reduced, and the problem that the packages are prone to toppling and rolling when entering the sliding chute 70 when each existing balance wheel set swings at a swinging angle of 45 degrees can be solved.
As shown in fig. 4, when the balance wheel sorter 10 sorts the parcel into the chute 70, the preferred drop point is the central area of the entrance end of the chute 70, and the more preferred drop point is the central point 01 of the entrance end of the chute 70. Meanwhile, when the parcel is input into the chute 70, it is preferable that the center of the parcel (the center point of the projection of the parcel on the support surface where the parcel is located) is in the central area of the inlet end of the chute 70, so that the probability of collision between the parcel and the side wall of the chute 70 when the parcel enters the chute 70 can be effectively reduced. It is more preferable that the center of the parcel coincides with the center point O1 of the entrance end of the chute 70 or the center of the parcel is on the center line of the entrance end of the chute (a line passing through the center point 01 of the entrance end of the chute and perpendicular to the entrance end of the chute) when the parcel is input into the chute 70.
As shown in fig. 4, when the swing angle of the balance wheel is 45 °, the speed component of the X axis and the speed component of the Y axis reach the maximum simultaneously during the transportation, so that when the parcel does not slide at the chute 70 with driving force, the maximum speed components in two directions ensure that the parcel does not stay at any place of the chute 70. Therefore, when the balance sorter 10 is sorting, the swing angle of the last two balance wheel sets (the K-1 st and K-th balance wheel sets) is always fixed at 45 °. Meanwhile, the swing angles of the other balance wheel sets (the 1 st to the K-2 th balance wheel sets) are sequentially increased from the input end 101 to the output end 102 of the balance wheel sorting machine 10, so that the moving distance of the packages wrapped on the other balance wheel sets in the X-axis direction is gradually increased. Preferably, the swing angles of the other swing wheel groups are increased by a fixed value or the swing angles of the other swing wheel groups meet the requirement that the distance of the parcel moving on the other swing wheel groups along the X-axis direction is increased by a fixed value d, namely when the parcel passes through each swing wheel group, the distance of the parcel moving on the swing wheel group along the X-axis direction is increased by a fixed value d compared with the distance of the parcel moving on the previous swing wheel group along the X-axis direction.
As shown in fig. 4, in order to facilitate the subsequent control of the moving path of the parcel, the tip 103 of the K-1 th oscillating wheel group of the balance sorter 10 is made flush with or close to the center line of the entrance end of the chute 70 (the center point O1 is located on the center line). It is of course also possible to have the Y-axis centerline of the kth balance wheel set (perpendicular to the widthwise centerline 104 of the balance sorter) be flush with or close to the centerline of the entrance end of the chute 70. As the swing angle of the K-1 th swinging wheel set is fixed to be 45 degrees, the distance S of the movement of the package on the swinging wheel set along the X-axis direction Group K-1 Is fixed and equal to the width L of the pendulum wheel group Group of When the front end (end facing the conveying direction) of the parcel moves to the tail end 103 (the end where the K-1 th oscillating wheel set is connected with the K-th oscillating wheel set) of the K-1 th oscillating wheel set (the K-1 th oscillating wheel set) or moves to the Y-axis central line of the K-th oscillating wheel set (the last oscillating wheel set), the center or the X-axis central line 02 of the parcel moves to the edge of the corresponding sorting side of the oscillating wheel sorting machine, and of course, the front end (end facing the conveying direction) of the parcel can also move to the outer side of the oscillating wheel sorting machine. Therefore, when the front end of the parcel moves out of the K-2 th swinging wheel set, the X-axis central line 02 of the parcel is required to be located at the position P1, and then the swinging angle of the 1 st to the K-2 th swinging wheel sets is required to be calculated according to the optimal path.
As shown in fig. 4, in consideration of abnormal phenomena such as tipping and rolling of the parcel caused by an excessively large swing angle, a curved flexible path plan is selected, that is, when the parcel passes through the 1 st to K-2 th swing wheel sets, the moving distance of the X-axis center line of the parcel on each swing wheel set along the X-axis direction gradually increases, the increment is d, and the moving distance of the X-axis center line of the parcel on the 1 st swing wheel set along the X-axis direction is also d; the distance of the X-axis central line of the parcel moving along the X-axis direction on the m (m is between 1 and K-2, K is not less than 5 and not more than 10, and K is 6 in figure 3, namely m is an integer between 1 and 4) pendulum wheel set is defined as S m groups (ii) a In the process of moving the front end of the parcel from the input end of the balance wheel sorting machine to the tail end of the K-2 th balance wheel set (the end connected with the K-1 th balance wheel set), the distance of the X-axis central line of the parcel needing to move along the X-axis directionIon is defined as S Bag X Thus, the swing angle of the mth swing wheel group can be calculated to be alpha m groups 。
Specifically, the swing angles of the other swing wheel groups are calculated according to the following formula:
α m groups ＝Arctan S m groups of /L Group of ；
S m groups ＝m×d；
d＝2×S Bag X /[(K-1)×(K-2)]；
S Bag X ＝W Balance wheel /2+Px-S Group K-1 ；
Wherein alpha is m groups The swing angle of the mth swing wheel group; s. the m groups of The distance of the X-axis central line of the package moving on the mth swing wheel group along the X-axis direction; l is Group of The width of each pendulum wheel group; m is the sequence number of the pendulum wheel group, and m is an integer less than K-1; k is the number of the oscillating wheel sets of the oscillating wheel sorting machine and is an integer between 5 and 10; d is the increment of the moving distance of the X-axis central line of the package on the two adjacent pendulum wheel sets along the X-axis direction; s. the Bag X In the process that the front end of the parcel moves from the input end of the balance wheel sorting machine to the tail end of the K-2 balance wheel set, the central line of the X axis of the parcel needs to move along the direction of the X axis; w Balance wheel The width of the balance wheel sorter; px is the distance from the center of the package or the center line of the X shaft of the package to the virtual line of the center of the balance wheel sorting machine in the width direction; s Group K-1 The distance of the X-axis central line of the parcel moving along the X-axis direction on the K-1 th swinging wheel group.
And calculating the swing angles from the 1 st to the K-2 th pendulum wheel groups according to the formula, and controlling the swing angles of the corresponding pendulum wheel groups during sorting.
Example 3
The balance sorting system is also used in the present embodiment, and differs from embodiment 2 in that: as shown in fig. 5, in the embodiment, a single piece separating device 80 is connected in front of the code scanning and conveying device 30, the single piece separating device 80 is used for conveying the batch packages laid thereon one by one outside the single piece separating device 80 after being longitudinally spaced apart, and the single piece separating device 80 is preferably a visual single piece separating device, and the specific structure thereof is known in the art and will not be described herein.
A tracking photoelectric sensor 90 is arranged in front of the code reading mechanism and behind the single-piece separating device 80. As shown in fig. 5, an edge or center conveyor 100 is provided between the output of the singulator separation device 80 and the sweep gate conveyor 30 to enable the parcels output by the singulator separation device 80 to be moved toward the same location to facilitate control of subsequent sorting operations.
As shown in fig. 5, in order to effectively determine the actual stall condition of the package after passing through each of the balance sorting machines 10, a rechecking photoelectric sensor 50 is disposed in front of each balance sorting machine 10, and each rechecking photoelectric sensor 50 is disposed at a position slightly behind and in the middle of the belt conveyor 20 between two adjacent balance sorting machines 10.
To facilitate subsequent return of the packages, the last belt conveyor 20 or the last balance sorter may engage a return line (not shown) that may convey the abnormal packages to a manual handling area for manual handling.
In operation of the entire system, a large number of packages laid flat are supplied by hand or by a supply conveyor to the single-piece separating device, which is preferably a visual single-piece separating device. After the packages are output one by the single-piece separating device, the packages are conveyed to pass through the tracking photoelectric sensor 90, and then pass through the code reading mechanism, and the PLC determines and records the length information of the packages when the packages pass through the tracking photoelectric sensor.
In the process from the acquisition of the route of each package according to the method of the above embodiment 1 to the sorting or reflow of the package, as shown in fig. 6, the following processes are performed:
s10, receiving a signal when the Nth package passes through the Mth rechecking photoelectric sensor;
s20, determining the length information of the current parcel according to the current signal, comparing the length information with the length information of the current parcel measured by a previous rechecking photoelectric sensor (M-1 rechecking photoelectric sensors) or a tracking photoelectric sensor or a scanning photoelectric sensor of the current rechecking photoelectric sensor (Mth rechecking photoelectric sensor), and executing S30 when the length difference value is determined to exceed a threshold value; when it is determined that the length difference does not exceed the threshold, performing S80;
s30, determining whether a parcel (the (N-1) th parcel) before the current parcel is sorted at the balance wheel sorting machine corresponding to the current parcel, and executing S40 when the determination is negative; when the determination is yes, S50 is performed;
s40, judging whether other parcels (N-N, N is more than 1 and less than N) before the current parcel are lost or not, if not, confirming that the current rechecking photoelectric sensor is abnormal in measurement and recording abnormal conditions; if yes, judging that the packages are piled up in multiple packages, emptying tracking data of the current packages, and reflowing the packages by a control system;
s50, judging whether the previous package (the (N-1) th package) is successfully sorted, if so, confirming that the current rechecking photoelectric sensor (the Mth rechecking photoelectric sensor) is abnormal, recording abnormal measurement conditions and executing S60; if not, judging that the packages are piled with multiple packages, emptying the tracking data of the current packages, and reflowing the multiple packages by the control system;
s60, analyzing whether abnormal measurement continuously occurs or occurs in a large quantity, and if so, executing S70; if not, executing S80;
s70, controlling an alarm to alarm;
s80, confirming whether a balance wheel sorting machine (Lth balance wheel sorting machine) behind the current rechecking photoelectric sensor (Mth rechecking photoelectric sensor) is a balance wheel sorting machine corresponding to the current parcel routing, and if so, executing S90; if not, executing S100;
s90, starting the balance wheel sorting machine to sort when the current parcel (Nth parcel) moves to the balance wheel sorting machine (Lth balance wheel sorting machine);
and S100, continuing to track the current package, and executing S20 when the current package is received and passes through the next rechecking photoelectric sensor (the M +1 th rechecking photoelectric sensor).
For example, the rechecked photosensors are numbered 1, 2, 3, 4 … … N in sequence according to the order in which the packages pass through the rechecked photosensors; when a parcel a passes through the 2 nd rechecking photoelectric sensor, the length data L1 of the current parcel a is determined and compared with the length data L2 measured when the current parcel a passes through the 1 st rechecking photoelectric sensor, and when the difference value between L1 and L2 is greater than a threshold value, at this time, the problem that the parcel a is piled together after colliding with the parcel left before when the first rechecking photoelectric sensor moves to the 2 nd rechecking photoelectric sensor, so that the length data measured at the 2 nd rechecking photoelectric sensor is increased may exist. Next, it is determined whether a parcel b preceding parcel a is sorted at its route corresponding to the balance sorter.
If the balance wheel sorting machine corresponding to the previous package b does not sort, determining whether other packages c before the package a have the phenomenon of tracking loss, and if the packages c with the tracking loss are determined, determining that the packages a and the packages c with the tracking loss are multi-package stacked packages, emptying the sorting tracking data of the packages a at the moment, and refluxing the packages a and the packages c with the tracking loss; and if no lost package c is tracked, determining that the 2 nd rechecking photoelectric sensor is abnormal in measurement and recording the abnormality.
If the balance wheel sorting machine corresponding to the previous parcel b sorts, whether the parcel b is successfully sorted is further judged (a sensor for determining that the parcel enters the balance wheel sorting machine is arranged at the grid or the chute, and a triggering sensor in the grid or the chute of the parcel indicates that the sorting is successful, otherwise, the sorting is failed). And if the packages b are successfully sorted, determining that the 2 nd rechecking photoelectric sensor is abnormal in measurement and recording. And if the sorting of the packages b fails, judging that the packages b are detained, wherein the packages a and the packages b are multi-package stacked packages, emptying sorting tracking data of the packages a, and refluxing the packages a and the packages b.
When the 2 nd rechecking photoelectric sensor is determined to be abnormal in measurement, whether the abnormal measurement condition continuously appears or appears in large quantity is continuously judged, if the abnormal measurement condition continuously appears or appears in large quantity, an alarm is given to carry out manual processing, and at the moment, the speed of the belt conveyor is abnormal or the photoelectric sensor is interfered by foreign matters possibly. If the number of the packages is not continuous or large, determining whether a second balance wheel sorting machine behind the 2 nd rechecking photoelectric sensor is a balance wheel sorting machine corresponding to the route of the package a or not; if yes, starting a second balance wheel sorting machine to sort the packages a; if not, the parcel a is continuously tracked, when the parcel a moves to the 3 rd rechecking photoelectric sensor, the length of the parcel is measured again and compared with the data of the 2 nd rechecking photoelectric sensor, and the judgment process is repeated according to the comparison condition until the parcel a flows back or the parcel a is sorted at a balance wheel sorting machine corresponding to the route of the parcel a.
The invention is capable of embodiments and other arrangements, which may be devised with or without departing from the spirit and scope of the present invention.
Claims (8)
1. The sorting control method for multi-party information interactive tracking is characterized in that: the method comprises the following steps:
s1, when a parcel triggers a scanning photoelectric sensor, a PLC system receives the signal, establishes a tracking task and a task number of the tracking task and tracks the parcel;
s2, the PLC system sends the task number to a triggered code reading system, the code reading system receives the task number, binds the task number with a decoding thread of the currently scanned package, and immediately sends the task number and a decoding result to the WCS system after decoding is completed;
s3, the WCS binds the task number and the routing request processing thread of the package bar code, and after the WMS obtains routing information, the WCS sends the task number, the bar code information and the routing information to the PLC system together;
s4, the PLC system extracts a task number according to the information returned by the WCS, inquires the tracking data of the package of the task number and obtains the current position information of the package;
s5, updating the tracking data of the package again according to the routing information, and updating the sorting pulse data according to the routing information;
and S6, the PLC starts the sorting mechanism to act to sort when the sorting pulse data arrives.
2. The method of claim 1, wherein the method comprises: the tracking task is to determine whether the PLC receives the route information fed back by the WMS in the theoretical pulse data or the theoretical use time when the parcel moves to the preset position behind the code reading mechanism from the scanning photoelectric sensor after S3 and before S4 when tracking the actual pulse data or the actual use time when the parcel moves to the preset position behind the code reading mechanism from the scanning photoelectric sensor; if not, the tracking data of the task number is emptied, and the package is reflowed.
3. The method of claim 1, wherein the method comprises: the code reading system adopts a six-surface code reading mechanism to read codes.
4. The method of claim 1, wherein the method comprises: and the packages are conveyed to the scanning photoelectric sensor one by one through a single piece separating device or conveyed to the scanning photoelectric sensor one by one through a telescopic belt conveyor and a tension distance belt conveyor.
5. The sorting control method with multi-party information interactive tracking according to any one of claims 1-4, wherein: the sorting mechanism is a balance wheel sorting machine.
6. The method of claim 1, wherein the method comprises: and a rechecking photoelectric sensor is arranged at the conveyor in front of each balance wheel sorting machine, the length and/or the stall condition of each package are analyzed through the rechecking photoelectric sensor, and sorting control is performed according to the corresponding analysis result.
7. The method as claimed in claim 6, wherein the method comprises: when each parcel passes through each rechecking photoelectric sensor, the PLC executes the following steps:
s10, receiving a signal when the Nth package passes through the Mth rechecking photoelectric sensor;
s20, determining the length information of the current parcel according to the current signal, comparing the length information with the length information of the current parcel measured by a rechecking photoelectric sensor or a tracking photoelectric sensor or a scanning photoelectric sensor which is arranged in front of the current rechecking photoelectric sensor, and executing S30 when the length difference value is determined to exceed a threshold value;
s30, determining whether a parcel before the current parcel is sorted at the balance wheel sorting machine corresponding to the current parcel, and executing S40 when the determination is no, and executing S50 when the determination is yes;
s40, judging whether other packages before the current package are lost or not, if not, confirming that the current rechecking photoelectric sensor is abnormal in measurement and recording abnormal conditions; if yes, judging that the packages are piled up in multiple packages, emptying tracking data of the current packages, and reflowing the packages by a control system;
s50, judging whether the previous package is successfully sorted, if so, confirming that the current rechecking photoelectric sensor is abnormal, recording abnormal measurement conditions and executing S60, otherwise, judging that the current package is stacked into a plurality of packages, emptying the tracking data of the current package, and reflowing the plurality of packages by a control system;
s60, analyzing whether abnormal measurement continuously or largely occurs, if so, executing S70, otherwise, executing S80;
s70, controlling an alarm to alarm;
s80, confirming whether a balance wheel sorting machine behind the current rechecking photoelectric sensor is a balance wheel sorting machine corresponding to the current parcel route, and if so, executing S90; if not, executing S100;
s90, starting the balance wheel sorting machine to sort when the current parcel moves to the balance wheel sorting machine;
and S100, continuing to track the current package, and executing S20 when receiving a signal that the current package passes through the next rechecking photoelectric sensor.
8. The method of claim 1, wherein the method comprises: the sorting mechanism is a balance wheel sorting machine, each balance wheel sorting machine is provided with K swing wheel sets which are sequentially arranged from an input end to an output end of the balance wheel sorting machine, each swing wheel set is driven by one swing mechanism to swing, and when the balance wheel sorting machine sorts, packages entering the balance wheel sorting machine move to the outside of the balance wheel sorting machine along a curve or a zigzag line by controlling the swing angle of each swing wheel set.
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| CN202111090154.0A CN115815130A (en) | 2021-09-17 | 2021-09-17 | Sorting control method for multi-party information interactive tracking |
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