A kind of automatic piece supplying table and control method for halved belt sorter
Technical field
The invention belongs to logistics equipment technical field, more particularly to a kind of automatic piece supplying table control for halved belt sorter
Method processed.
Background technology
Piece supplying table is one of nucleus equipment of halved belt sorter.Piece supplying table be used for by a certain size, the mail of quality, bag
Wrap up in and be automatically imported into main ring, while e-mail messages are sent into main ring PLC.Traditionally, piece supplying table needs artificial at end
Put part section goods of furniture for display rather than for use.With the lifting of human cost, postal, requirement of the logistic industry to the automaticity of equipment is increasingly
It is high to save artificial goods of furniture for display rather than for use, it is necessary to develop a energy and meet, the automatic piece supplying of direct upper part is directly transmitted through belt feeder from mouth of unloading
Platform.Because upper part position is far from piece supplying table and unattended, this efficiency and the upper part degree of accuracy just to piece supplying table propose higher
Requirement.
The current piece supplying table generally used is generally two sections or four-part form, they or to parcel or referred to as mail is put
Position is required, or efficiency is inadequate, it is impossible to meet extensive self-propagating demand.In general, increasing belt hop count and subtracting
It is few per segment length the control mode of mail to be made more flexible, and then efficiency can be improved, but control mode can also be proposed higher
Requirement.In addition, it is contemplated that the charging of parcel, it is necessary to the weight information comprising mail, it is therefore necessary to which exploitation is with function of weighing
High efficiency piece supplying table.
Generally piece supplying table peak efficiency is used to be 2200~2400/hour at present, automatic piece supplying table will reach 3000
More than.With increasing for mail hop count, the position of mail how is accurately positioned on the premise of maximal efficiency is met, postal is reduced
Part spacing, and the parcel is accurately sent on the pallet of main ring, the problem of being related to Mail tracking and upper part.Mail is from upper
Swim belt feeder and send into automatic piece supplying table, before by portal frame, it is necessary to carry out mail compartment away from regulation, to prevent small spacing
Produce.If in addition, wrapping up relatively more on main ring, occurring needing to wait situation about wrapping, it is necessary to control each belt section and upstream
The start and stop of belt feeder.For section of weighing, raising as far as possible is needed to connect bag efficiency under the premise of weighing accurately.
The content of the invention
The present invention provides a kind of automatic piece supplying table control method of nine segmentations used suitable for halved belt sorter.
A kind of automatic piece supplying table for halved belt sorter, using nine segmentation structures, by the upper part section near main ring
First paragraph is set to, and is sorted successively, the mitered section that will be close to belt feeder is set to the 9th section,
Measurement photoelectricity portal frame is set between the 6th section and the 7th section, the size for measuring parcel,
7th section of conduct therein is weighed section,
All the motor of nine sections is connected by bus with control system.
Control system includes master controller, master controller and frequency converter, upper bag track plates, analog I/O module, belt feeder, master
Ring PLC, piece supplying station terminal are connected.
The order of parcel operation is that, from the 9th section to first paragraph, the rate-determining steps of automatic piece supplying table include:
S101, when the afterbody of parcel leaves belt feeder, empties the 9th time for following timer,
When it is zero that the 8th section, which follows flag bit, the 9th section follows the value of timer to determine stopping for this section according to the 9th section
Only, if the value is more than a particular value, illustrate that this section parcel has been walked far, stop again after bag can be connect, otherwise must be immediately
Stop;
S102, when parcel enters the 8th section and blocks the 8th section of mail-detection photoelectricity, flag bit is followed according to the 7th section
To determine the operation of current mail,
If the 7th section follow flag bit be 0, stop the 8th section, wait the 7th section follow flag bit be 1 after restart,
The range ability that dynamic monitoring is wrapped up in the process, it is ensured that range ability is no more than the 8th section during stopping;
S103, when parcel completely into the 7th section, start to weigh, when reach weigh the time after, stopping weigh and start to connect
Weighing data is received, if now range ability exceedes setpoint distance, tracks enable bit to determine current mail according to upper part
Operation,
If upper part tracking enable bit is 0, stops the 7th section, restart after waiting the position 1;
S104, is wrapped up as the 7th section is moved into measurement photoelectricity, real-time according to the value of feedback of code-disc and measurement photoelectricity
Calculate length, the width parameters of mail;
S105, after parcel completes dimensional measurement, moves forward and enables communication,
If receiving the trigger signal of track photoelectricity, automatic station works as front tray number and pallet state to main ring PLC inquiries, if
Reply when front tray number and pallet is available, pallet is inquired to infrared track plates by serial ports, if pallet, which is replied, allows bag, led to
Letter terminates, and parcel enters synchronous phase;
S106, if communication failure cause the pallet can not upper part, judge whether to second of communication,
If second can be completed before dynamic communication end point to communicate, carry out second and communicate,
Communicate and successfully then enter synchronous phase,
If communicating unsuccessful during uniform motion, parcel slows down and proceeds to communicate after a stop, Zhi Daotong
Letter is successfully entered synchronous phase;
S107, after communicating successfully, upper bag parameter is calculated according to the move distance of current mail, position of form center parameter, for
The parcel moved calculates the time that it continues uniform motion, calculate that it continues waiting for the parcel stopped when
Between,
After reaching corresponding uniform motion or stand-by period, parcel enters boost phase and accelerates to synchronous speed always
Degree, hereafter continues to move until parcel is sent into pallet with the synchronizing speed;
S108, automatic piece supplying table detects displacement of the current package in piece supplying table in real time by each section of code-disc, and with this
It is used as the transmission of mail sequence number, the foundation of speed control.
The present invention in view of the shortcomings of the prior art, realizes and steadily, accurately imports all satisfactory specification mails
Main ring pallet.Belt hop count after the automatic piece supplying table of the present invention, particularly portal frame measurement photoelectricity is more, corresponding each section of belt
Length is also reduced, so that the spacing between parcel also accordingly diminishes, and is conducive to improving efficiency.In halved belt sorter
The automatic piece supplying table of nine segmentations actual use in obtain good effect.
Brief description of the drawings
Fig. 1 is the automatic piece supplying table schematic diagram of nine segmentations in the embodiment of the present invention.
Fig. 2 control method schematic flow sheets of the present invention.
Principle of Communication figure in Fig. 3 embodiment of the present invention
Wherein:1 --- first paragraph belt, 2 --- second segment belt, 3 --- the 3rd section of belt, 4 --- the 4th section of belt,
5 --- the 5th section of belt, 6 --- the 6th section of belt, 7 --- the 7th section of belt, 8 --- the 8th section of belt, 9 --- the 9th section of skins
The measurement photoelectricity portal frame of band, 10 --- the photoelectricity containing detection, 11 --- seven or eight intersegmental detection photoelectricity, 12 --- the 8th section of detection lights
Electricity, 13 --- track trigger photoelectricity, 14 --- infrared track plates 1,15 --- infrared track plates 2.
Embodiment
The control system of the present invention is that the triangle section (upper part section) that will be close to main ring sorts as first paragraph, and successively, will
Mitered section close to belt feeder is used as the 9th section.Measurement photoelectricity portal frame is set between the 6th section and the 7th section, for measuring
The size of mail, the 7th section is section of weighing.Nine sections of motors pass through Profibus-DP bus systems by Frequency Converter Control
It is connected with control system.Control system using programmable logic controller (PLC) as master cpu, by DP modules (and frequency converter),
Serial port module (and upper bag track plates), analog I/O module and associated peripheral, device are attached and communicated, and pass through
Profinet interfaces and belt feeder, main ring PLC, piece supplying station terminal are communicated.Technical scheme be applied to mail and
Parcel, mail and parcel are same implications in control.
For the control method of the automatic piece supplying table of nine segmentations of halved belt sorter, comprise the following steps:
A) when the afterbody of parcel leaves belt feeder, program can empty the 9th time for following timer.When the 8th section with
When with flag bit being zero, the 9th section follows the value of timer to determine the stopping of this section according to the 9th section.If the value is more than one
Particular value, then illustrate that this section of mail has been walked far, stops again after can connecing bag, otherwise must stop immediately.In the step, the 9th
Duan Qiting logic controls upstream belt feeder, mail is controlled into automatic station.
B) when mail enters the 8th section and blocks the 8th section of mail-detection photoelectricity, program follows flag bit according to the 7th section
To determine the operation of current mail.If the 7th section follows flag bit to be 0, stop the 8th section, wait the 7th section and follow mark
Position is to restart after 1, the range ability of program dynamic monitoring mail in the process, it is ensured that range ability is no more than the during stopping
Eight sections.In the step, section of weighing is controlled into mail, it is ensured that the uniqueness for mail of weighing.
C) when parcel completely into the 7th section, start to weigh, when reach weigh the time after, stopping weigh and start receive claim
Tuple evidence.If now range ability exceedes setpoint distance, program tracks enable bit to determine the fortune of current mail according to upper part
OK.If upper part tracking enable bit is 0, stops the 7th section, restart after waiting the position 1.To Weighing control in the step
And control mail upper part order.
D) mail is moved into measurement photoelectricity with the 7th section, and program is real-time according to the value of feedback of code-disc and measurement photoelectricity
Calculate the parameters such as length, the width of mail.
E) after mail completes dimensional measurement, move forward and enable communication.If receiving the triggering of track photoelectricity
Signal, automatic station works as front tray number and pallet state to main ring PLC inquiries.If replying when front tray number and pallet being available, journey
Sequence inquires pallet by serial ports to infrared track plates, if pallet, which is replied, allows bag, sign off, mail enters same step
Section.
If f) communication failure cause the pallet can not upper part, program determines whether that carrying out second communicates.If in dynamic
Second can be completed before sign off point to communicate, then carries out second and communicate.Communication process is identical with first time, communicates successfully then
Into synchronous phase.If communicating unsuccessful during uniform motion, mail slows down and proceeds communication after a stop, directly
Synchronous phase is successfully entered to communication.The step realizes the upper packet communication control of mail motion.
G) after communicating successfully, program calculates upper bag parameter according to parameters such as move distance, the position of form center of current mail.Just
Its time for continuing uniform motion is calculated in the mail of motion, the mail stopped calculating the time that it is continued waiting for.
After reaching corresponding uniform motion or stand-by period, mail enters boost phase and accelerates to synchronizing speed always, hereafter with
The synchronizing speed continues to move until mail is entered into pallet.The step is upper bag motion control step.
H) automatic station detects displacement of the current mail in piece supplying table in real time by each section of code-disc, and in this, as mail
Sequence number transmission, the foundation of speed control.
With reference to specific implementation case and accompanying drawing, the present invention is expanded on further:
1) it is first paragraph close to main ring as shown in figure 1, automatic station is divided into 9 sections, the like, close to upstream belt feeder
For the 9th section.After start, in main ring speed under the 2.0m/s speed of service, first paragraph is transported by synchronizing speed 2.3m/s
OK, second segment is to the 8th section by 1.5m/s operations, and the 9th section is run by 2.0m/s.Control system PLC is total by Profibus-DP
Line and the communication of each section of frequency converter, are controlled for the start-stop to each section, rotating speed.The automatic piece supplying table of nine segmentation can and very well
Coordinate with upstream belt feeder, farthest improve efficiency, it is ensured that weigh, the Stability and dependability of upper part.
2) 1~8 section of the automatic station is equipped with code-disc, and obtains code-disc number by photoelectricity and then obtain range ability, in real time
Range ability of the mail in whole piece supplying table is obtained, program can be made to be more accurately located mail position, each section of mail is controlled
Transmission, farthest reduce mail compartment away from accurately controlling each section of speed.Operation to the whole piece supplying table of mail simultaneously
Journey be divided into part, weigh, communicate, upper part each stage, and different mail sequence numbers are set, it is to avoid each process it is mutually relevant
Disturb, improve efficiency.
3) automatic station is by an ethernet port and upstream belt feeder exchange state information, and passes through a hard contact reality
When control upstream belt feeder whether can to automatic station transmit mail.Photoelectric detection system is provided between automatic station and belt feeder, often
When there is mail to be allowed to enter the 9th section, automatic station can receive the mail into information and empty the 9th section and follow timer
Time.Program determines the 9th section of operation according to the 8th section of running status and issues the control command of upstream belt feeder.When
8th section follows flag bit when being zero, then follows the value of timer according to the 9th section to determine whether the 9th section stop.If the value
More than one particular value, then illustrate that this section parcel has been walked far, stop again after can connecing bag, otherwise must stop immediately and upward
Trip belt feeder, which is sent, ceases and desist order.
4) after mail enters the 9th section from upstream belt feeder, the faster speed of the section can make mail be easier to be flushed to the
Eight sections of centre positions.After mail enters the 8th section, run at the 8th section of mail-detection photoelectricity (as shown in mark 12 in Fig. 1
Position) after, automatic station is by this section of range ability value zero setting.Now judge that the 7th section follows flag bit, if the flag bit is 1,
Mail can continue to run forward.If 0, then wait of stopping immediately.If the 7th section follows flag bit in continuing to run with
It is changed into 0, equally stop the range ability for waiting and judging now immediately.If can not ensure, the mail is parked in before the 7th section,
Reporting system failure.
5) the 7th section is section of weighing, and the section requires that mail must remain a constant speed motion and mail number is unique when weighing,
To ensure the accuracy weighed.The length for section of weighing is usually set to S1=V*T+Lmax+Lplus, wherein V is the 7th section of operation speed
Degree, T claims response time, L for dynamicmaxFor the maximum size of an item, LplusFor design margin.It is provided between 7th section and the 8th section
Photoelectricity is detected, for detecting the entrance of mail.There is mail to enter fashionable, that is, empty the range ability value of this section.When mail enters completely
Enter after the section, then immediately begin to weigh, when reach weigh the time after, stopping weigh and start receive weighing data.Now mail
Continuation is run forward, if range ability exceedes setpoint distance, program tracks enable bit to determine current mail according to upper part
Operation.If the position is 0, stops the 7th section, restart after waiting the position 1.
6) mail is moved into measurement photoelectricity with the 7th section, and program is according to the value of feedback of range ability and measurement photoelectricity
Length, width and the area of mail are calculated in real time.
7) after mail completes dimensional measurement, move forward and proceed by packet communication.As shown in figure 3,
Main ring track is respectively equipped with track triggering photoelectricity (13 in Fig. 2) close to piece supplying table short brink, infrared track plates 1 (14 in Fig. 2), red
Outer rail guidance tape 2 (15 in Fig. 2).If track photoelectricity receive dolly head by when trigger signal, automatic station i.e. to main ring PLC ask
Ask current by pallet number and pallet state.If main control PLC is replied when front tray number and pallet is available, automatic station can be with pallet
Communicated.Program inquires dolly state by serial ports to infrared track plates 1, and the track plates are led to by infrared and pallet
Letter.If pallet, which replys infrared track plates 2, to be allowed upper part and message is returned into automatic station, sign off.Its flow chart such as Fig. 3 institutes
Show.
8) program is provided with a dynamic communication halt.The distance of the point and initiation of communication point is:
S2=(T1+T2) * V0, T1 is pallet by triggering time of photoelectricity, and T2 is the pallet communication overtime time.
If communication does not obtain effective upper part information for the first time, and can complete logical for the second time before dynamic communication halt
Letter, then carry out communicating for second.Communication process is identical with first time.If communicating unsuccessful during uniform motion, mail
Slow down in dynamic communication end point and proceed to communicate after a stop, wait to be communicated being successfully entered the upper part stage.
9) after communicating successfully, program calculates upper bag parameter according to parameters such as move distance, the position of form center of current mail.Just
Its time for continuing uniform motion is calculated in the mail of motion, the mail stopped calculating the time that it is continued waiting for.
After reaching corresponding uniform motion time or stand-by period, mail enters boost phase and accelerates to synchronizing speed always, this
Continue to move until mail is sent into pallet with the synchronizing speed afterwards.Because first paragraph is run with synchronizing speed, if calculating
Mail is being not up to synchronizing speed into first paragraph fashion, then first paragraph speed needs to drop to second segment speed sync to connect postal
Part.