EP3817868A1 - Procede de tri de colis sur convoyeur avec indicateurs lumineux mobiles - Google Patents
Procede de tri de colis sur convoyeur avec indicateurs lumineux mobilesInfo
- Publication number
- EP3817868A1 EP3817868A1 EP19737837.5A EP19737837A EP3817868A1 EP 3817868 A1 EP3817868 A1 EP 3817868A1 EP 19737837 A EP19737837 A EP 19737837A EP 3817868 A1 EP3817868 A1 EP 3817868A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- light
- sorting
- conveyor
- package
- packages
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
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- 238000012544 monitoring process Methods 0.000 claims description 2
- 230000002250 progressing effect Effects 0.000 claims description 2
- 230000008569 process Effects 0.000 description 12
- 230000032258 transport Effects 0.000 description 6
- 238000004458 analytical method Methods 0.000 description 4
- 238000006073 displacement reaction Methods 0.000 description 3
- 230000009471 action Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000000605 extraction Methods 0.000 description 2
- 230000003287 optical effect Effects 0.000 description 2
- 101100172874 Caenorhabditis elegans sec-3 gene Proteins 0.000 description 1
- 238000013528 artificial neural network Methods 0.000 description 1
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- 238000006243 chemical reaction Methods 0.000 description 1
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- 238000010223 real-time analysis Methods 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
- 238000011144 upstream manufacturing Methods 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
- B07C—POSTAL SORTING; SORTING INDIVIDUAL ARTICLES, OR BULK MATERIAL FIT TO BE SORTED PIECE-MEAL, e.g. BY PICKING
- B07C7/00—Sorting by hand only e.g. of mail
- B07C7/005—Computer assisted manual sorting, e.g. for mail
Definitions
- Sorting method in which the packages are transported by a conveyor in a direction of travel to an operator, in which a control-command unit identifies a package to be sorted by means of a reading of an identification element and , in response to identification, automatically determines a sorting outlet for said package where it must be transferred by the operator from the conveyor, said control-command unit being arranged to control light sources distributed along the conveyor in order to generate and control a light indicator to assist in sorting the package such that said light indicator moves with said package along the conveyor.
- the packages are identified on the conveyor by means of optical readers acquiring information carried by the packages in alphanumeric form, bar code or two-dimensional symbols.
- the progress levels of each of the packages on the conveyor are deduced from the detection of their passage to a given level of the conveyor by photoelectric cells and from the knowledge of the speed of movement of the packages by the conveyor.
- the indicators accompany the packages because they are synchronized with the passage of the packages at a given point and are controlled to move at the supposed speed of the packages, in fact, the speed of movement of the conveyor.
- such a system requires a ginning of the packages, that is to say a transport of the packages one by one, separated from each other by a certain distance in their direction of movement so, by example, to avoid ambiguities as to the identity of the parcels which could lead to sorting errors.
- the process described above requires the reading of sorting indications by the operators as well as the implementation of a ginning system of the packages and is based on a predictive method of deducting the location of packages, a method that does not support the unexpected or the handling of packages during sorting.
- the invention aims to improve the robustness and the versatility of a sorting process using mobile light indicators.
- the subject of the invention is a method of sorting packages in which the packages are transported by a conveyor in a direction of movement up to a operator, in which a control-command unit identifies each package to be sorted by means of an automatic reading of an identification element attached to said package and, in response to the identification, automatically determines a sorting outlet for said package where this must be transferred by the operator from the conveyor, and said control-command unit being arranged to control light sources distributed along the conveyor in order to generate and control a light indicator of assistance in sorting said package of such that said light indicator moves with said package along the conveyor, characterized in that it comprises the following steps:
- digital images are acquired comprising said package moving on the conveyor, in that from said digital images, the control-command unit extracts in real time information on a position of said package and a dimension thereof according to the direction of movement of said package on the conveyor to monitor said package and, on the basis of this monitoring, controls the light sources in real time so as to form the light indicator in the form of a light segment having a length according to the direction of movement which is substantially equal to the dimension of said package according to the direction of movement.
- This process is to improve the robustness of the package tracking by allowing it to be tracked in real time along its entire route on the conveyor between its identification and its transfer by the operator, even in the event of the package being blocked or handled. during its movement or unexpected or undetected behavior of the conveyor.
- This process also has the effect of facilitating the identification of a parcel to be sorted by direct correspondence between a physical characteristic of the parcel and a visual characteristic of a light indicator: the length of the parcel according to the direction of movement and the width of the signal. bright are substantially equal.
- a chassis with indicator lights can be placed along the conveyor, receptacles on wheels that can be placed on the chassis can be used as sorting outlets, each receptacle being associated with one of the indicator lights and arranged to proximity thereof, and the control-command unit can command the lighting of an indicator light located near said sorting outlet to indicate to the human operator said sorting outlet;
- the light sources may be capable of emitting several colors of light
- the control unit may control the light sources in response to the determination of the sorting output of the package in such a way that said light segment is a first color, and a second light segment can move with a second package to be transferred to said sorting outlet and be of the first color;
- a third light segment progressing with a third package to be transferred to another sorting outlet may be of a second color different from the first color
- - Said indicator lights can be capable of emitting several colors of light and the control unit can control the indicator light located near said sorting outlet so that the indicator light emits light of the first color.
- FIG. 1 - Figures IA and IB respectively illustrate a top view and a side view of a sorting system comprising a conveyor;
- Figure 2A illustrates a digital image of the conveyor of Figures IA and IB;
- Figure 2B illustrates a strip of light sources located along the conveyor of Figures IA and IB;
- Figure 2C illustrates a diagram indicating the functional links between the elements of the sorting system of Figures IA and IB;
- FIG. 3A to 3C and 4 illustrate steps of the sorting process implemented by the system of Figures IA and IB.
- FIGS. IA to 4 An embodiment of a sorting method according to the invention is illustrated by FIGS. IA to 4.
- packages 110 to be sorted are placed on a conveyor during a step S00 and then, during a step S02, a conveyor 100 transports the packages 110 in a direction Dir of movement up to Op operators who are responsible for manually transferring these packages into receptacles 130 on casters used as sorting outlets.
- the conveyor 100 may for example be a belt conveyor or a roller conveyor.
- the receptacles on casters are arranged along the conveyor, at the level of one or more chassis 140 delimiting locations on the ground 144 each intended to be occupied by one of the trolleys 130.
- the chassis or the chassis 140 are fitted with an indicator light 142 at each location 144, here so that the indicators are located above the trolleys when the latter are in place, so that each indicator light is associated with one of the sorting outputs.
- the packages pass through an automatic reading means 150 which reads identification elements 112 attached to the packages, the automatic reading means being functionally connected to and controlled by a control unit.
- command 160 which identifies the packages during a step S04, for example by associating them each with the respective information read by the means 150 of automatic reading.
- the automatic reading means 150 can for example be an optical scanner capable of reading a barcode, a two-dimensional code or information presented in alphanumeric form present on an affixed label on the parcel and used as an identification element.
- the control-command system is configured to, during a step S06, automatically determine a sorting outlet for each of the identified packages, an outlet into which these packages must be transferred by the operator from the conveyor.
- This determination is made for example by retrieving information from a database 162 which contains a correspondence table between, on the one hand, the information such as destination addresses read from the packages by the automatic reading means 150 and, on the other hand, the sorting outlets in which the packages must be transferred by the operators, then by assigning to each package the corresponding sorting outlet according to the correspondence table.
- the conveyor is surmounted by cameras 170a to 170d arranged so that their fields of vision 172 overlap in pairs so as to preferably cover the entire course of a package on the conveyor between its passage through the automatic reading means 150 until it is transferred to a sorting outlet 130 by an operator Op.
- the cameras are controlled by the control-command system and send back to it the digital images which they acquire continuously between the passage of the packages at the level of the automatic reading means until the packages are picked up on the conveyor by the operators, the images being acquired at a frequency preferably greater than 5 Hz and less than 100 Hz, more preferably greater than 10 Hz and less than 30 Hz, in order to carry out a time control real without request excessive computing power.
- digital images are acquired comprising a parcel moving on the conveyor, these images are analyzed by the control-command unit which extracts in real time information on a position of the parcel on the conveyor and a dimension of it according to the direction of movement of the package on the conveyor to track the package.
- the analysis can be carried out by means of a neural network configured to locate the packages in the images, compare images taken successively and deduce therefrom the position and the displacement of each of the packages included in these images, the resulting analysis by tracking these packages during their travels.
- One of the cameras, the camera 170a in FIG. 1B, is arranged so that its field of vision covers the passage of the packages 110 at the level of the automatic reading means 150, and the control-command unit identifies a given parcel carrying information 112 read by the automatic reading means by associating it with the parcel identified at the level of the automatic reading means in the image acquired by this camera at the time of reading this information.
- image acquired by this camera at the time of reading it should be understood that, in a series of digital images taken in succession by said camera, we consider the digital image temporally closest to the time of reading.
- This process makes it possible to follow in real time the packages transported by the conveyor, independently of the speed of movement of the conveyor and the variations of this speed or unexpected stop, and is insensitive to handling of the packages as long as they remain on the conveyor and / or in the field of vision of the cameras, package tracking is therefore very robust and adaptable.
- the orientation of the cameras is such that, as illustrated in FIG. 2A which represents a digital image 250 acquired by one of the cameras, the fields of vision of the cameras are preferably more extended in the longitudinal direction of the conveyor, this is that is to say in the direction Dir of displacement of the packages, that in the transverse direction, and the columns of pixels of the digital images are oriented perpendicularly this direction Dir of displacement of the packages.
- control-command unit detects the points Pextl Pext2 of each package identified on the digital images which are respectively the most upstream and the most downstream of the conveyor, and the two columns of pixels CLl and CL2 on which these two points are respectively located.
- This operation amounts to extracting images, and in each image, the position P and the extent E of a projection of each package on an edge of the conveyor in a direction perpendicular to the direction of movement on the conveyor (it is considered here that the edge of the conveyor is perpendicular to the direction of movement of the packages).
- position P and the extent E are considered in the images and can therefore be expressed in pixels, but that, if necessary, a calibration establishing a correspondence between the points of the digital images and the real positions on the conveyor would make it possible to obtain positions and ranges measured in meters at the level of the conveyor; position P and extent E represent information on a position of the package and a dimension thereof according to the direction (Dir) of movement of the conveyor.
- the extraction of the positions P and the ranges E of each of the packages from digital images constitutes tracking of the packages on the basis of which the control-command unit controls, during a step S10, distributed light sources along the conveyor in the form of a strip 120 of light sources 205 so as to form light segments 122 having lengths L in the direction of movement Dir which are substantially equal to the dimensions D of the respective packages in the direction of movement and move with the respective packages, as shown in Figure IA.
- control unit switches on the light sources located at the level of the projection of a package by switching on the light sources positioned, on the images, between the columns CL1 and CL2 defining the position and extent of this package on an image, for example by means of a pre-established correspondence between, on the one hand, the pixel columns of the images and, on the other hand, the positions of the light sources 205 along the conveyor.
- the correspondence can be recovered by the control-command unit in a correspondence table prepared in advance and stored in the database 162.
- the lighting of the light sources is constantly updated and leads to the formation of light segments moving with the packages, which allows the operators immediately associate a mobile light segment with a package moving on the conveyor.
- FIG. 2B shows an initial situation and three successive updates of the ignition of light sources of a portion of a strip 120 of light sources at four successive instants tOO to t03, with the patterns 205a and 205b respectively indicating 205 light sources off and 205 light sources on.
- Successive updates make it possible to control the position and the length L of a light segment 122 movable along the conveyor, the length L being proportional to the extent E of a projection of each package on an edge of the conveyor in a perpendicular direction to the direction of movement on the conveyor, this projection being considered on one of the digital images used for tracking the package.
- each pixel in one of the images corresponds to a square of 1 cm side on the conveyor and that the strip 120 of light sources consists of light sources such as diodes distributed along the conveyor in a step of 1 cm, then each diode corresponds to one of the pixel columns of one of the images.
- the control system commands the lighting of the 50 diodes corresponding to these 50 pixels, which results in a light segment produced by the diodes of about 50 cm, this light segment moving with the package.
- Two strips 120 of light sources can frame the conveyor 100 and be controlled independently by the control-command system, for example in order to generate light segments intended for operators located on either side of the conveyor to transfer packages in sorting outlets also located on either side of the conveyor, as illustrated in FIG. IA.
- FIG. 2C illustrates that the control-command system 160 is functionally connected to the scanner 150, to the cameras 160a to 160d, to the strips 120 of light sources, to the indicator lights 142 and to the database 162.
- the conveyor is divided into sorting sections Sec-1 to Sec-4 indicated in FIG. 3A, each sorting section being assigned to a given operator having the responsibility of transferring the packages to a destination or several sorting outputs given at During a step S12, the control-command system does not generate the light segments for indicating the sorting of the packages until they enter the section of the operator responsible for their respective sorting destinations.
- FIG. 3A gives the example of a side view of a conveyor transporting packages to be sorted at 5 successive instants to at t 4 .
- a light segment 122x associated with a HOx package is only generated when this package enters the Sec-3 section under the responsibility of an operator to whom the transfer of this package is assigned to a sorting outlet.
- the light segments 122y and 122z associated respectively with HOy and 110O packages are generated as soon as these packages enter the Sec-2 section under the responsibility of an operator to whom the transfers of these packages are assigned.
- the method according to the invention makes it possible to generate light segments which are associated with respective packages and which make it possible to quickly and surely identify them as well in a situation (a) in which the packages are shelled on the conveyor only in a situation (b) in which the packages overlap in the direction perpendicular to the direction Dir of movement.
- a in which the packages are shelled on the conveyor only in a situation (b) in which the packages overlap in the direction perpendicular to the direction Dir of movement.
- the light indicators 122a and 122b are respectively associated with packages 110a and 110b, despite their overlap with other packages.
- This characteristic is very advantageous since a ginning of the packages on the conveyor is not necessary, and therefore that the packages can occupy the conveyor in a much denser manner, which increases the sorting rate and simplifies the procedure and the infrastructure. disposal of packages on the conveyor.
- step S12 a simple manipulation of one of the packages by the operator during a step SU is sufficient to remove the ambiguity, by longitudinal shift of one of the packages relative to the other and / or by changing its orientation, then proceeding to the transfer of step S12.
- a rotation of a package will generally result in a variation of the length of the associated light segment, passing from L1 in situation (a) to L2 in situation (b) after handling of the llOd package.
- one or the other of the preceding manipulations carried out by an operator makes it possible to remove the ambiguity and surely associate the light segment 122 with the package 110d, and not with the package 110c.
- control-command system turns on the indicator light 142 associated with this output, for example when the package is no longer spotted on the digital images used for tracking the package.
- the light sources 205 and the indicator lights 142 may be able to emit several colors of light.
- a sorting outlet can be associated with a particular color which is specific to it, and the control-command system can consequently generate light segments of this particular color when associated with a package to be transferred to this outlet. sorting, each sorting outlet being associated with a different color from the other sorting outlets.
- control-command system can control the indicator lights 142 in such a way that they each emit the color of their respective sorting outlets and that of the light segments 122 indicating the packages respectively to be transferred there.
- the color correspondences between the sorting outputs on the one hand and the light segments 122 and / or the indicator lights 142 on the other hand can be indicated in a table stored in the database 162.
- the removal of ambiguity as to the identification of a package to be transferred by an operator can also be done in real time, and this in the very simple manner explained above, which brings operational simplicity, robustness and flexibility to the sorting process.
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Sorting Of Articles (AREA)
- Control Of Conveyors (AREA)
- Discharge Of Articles From Conveyors (AREA)
- Spinning Or Twisting Of Yarns (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR1870813A FR3083460B1 (fr) | 2018-07-06 | 2018-07-06 | Procede de tri de colis sur convoyeur avec indicateurs lumineux mobiles |
PCT/FR2019/051323 WO2020008122A1 (fr) | 2018-07-06 | 2019-06-04 | Procede de tri de colis sur convoyeur avec indicateurs lumineux mobiles |
Publications (2)
Publication Number | Publication Date |
---|---|
EP3817868A1 true EP3817868A1 (fr) | 2021-05-12 |
EP3817868B1 EP3817868B1 (fr) | 2022-05-25 |
Family
ID=63209617
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP19737837.5A Active EP3817868B1 (fr) | 2018-07-06 | 2019-06-04 | Procede de tri de colis sur convoyeur avec indicateurs lumineux mobiles |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP3817868B1 (fr) |
ES (1) | ES2920699T3 (fr) |
FR (1) | FR3083460B1 (fr) |
WO (1) | WO2020008122A1 (fr) |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR3101072A1 (fr) * | 2019-09-19 | 2021-03-26 | Fives Intralogistics S.A. | Système de suivi d’articles |
CN111558537A (zh) * | 2020-06-03 | 2020-08-21 | 广东康利达物联科技有限公司 | 基于灯带指引的货物分拣系统及分拣方法 |
CN112958490A (zh) * | 2021-02-01 | 2021-06-15 | 广州市兴世机械制造有限公司 | 一种自动化流水线上不良品跟踪系统及方法 |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6878896B2 (en) * | 2002-07-24 | 2005-04-12 | United Parcel Service Of America, Inc. | Synchronous semi-automatic parallel sorting |
US8825200B2 (en) * | 2007-11-07 | 2014-09-02 | Siemens Industry, Inc. | Method and system for tracking of items |
US9299013B1 (en) * | 2014-03-27 | 2016-03-29 | Amazon Technologies, Inc. | Visual task feedback for workstations in materials handling facilities |
-
2018
- 2018-07-06 FR FR1870813A patent/FR3083460B1/fr not_active Expired - Fee Related
-
2019
- 2019-06-04 WO PCT/FR2019/051323 patent/WO2020008122A1/fr unknown
- 2019-06-04 ES ES19737837T patent/ES2920699T3/es active Active
- 2019-06-04 EP EP19737837.5A patent/EP3817868B1/fr active Active
Also Published As
Publication number | Publication date |
---|---|
FR3083460B1 (fr) | 2020-07-10 |
EP3817868B1 (fr) | 2022-05-25 |
ES2920699T3 (es) | 2022-08-08 |
FR3083460A1 (fr) | 2020-01-10 |
WO2020008122A1 (fr) | 2020-01-09 |
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