CN100493401C - Method and system for monitoring intelligent material allocation - Google Patents
Method and system for monitoring intelligent material allocation Download PDFInfo
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- CN100493401C CN100493401C CNB2006100119497A CN200610011949A CN100493401C CN 100493401 C CN100493401 C CN 100493401C CN B2006100119497 A CNB2006100119497 A CN B2006100119497A CN 200610011949 A CN200610011949 A CN 200610011949A CN 100493401 C CN100493401 C CN 100493401C
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Abstract
The invention is concerned with the monitoring method and system for the intelligence material matching. It is: sets the RFID label on the hanger, the card reader can get the information of the label and sends to the epigyny of the terminal unit of the station; when the hanger passes the reader of any working station; estimates the hanger whether or not enters the station to process manufacture after the epigyny receives the signal of the hanger, the programmable logic controller controls the pulling-in switch of the corresponding station according to the instruction from the epigyny. The invention uses radio frequency technology to real-time trace the processof the matching, which can achieve the informationization and quick identification of the material, in order that the matching process of the material can be high efficiency and intelligent management.
Description
Technical field
The invention belongs to the clothes processing technique field, relate in particular to a kind of method for supervising and system of intelligent material allocation.
Background technology
China is garment production big country, has more than 40 ten thousand tame garment enterprises at present.These enterprises mostly are labor-intensive enterprises, and ubiquity poor efficiency for a long time, and are expensive, piece together manpower, beat characteristics such as time war.But along with being growing more intense of International Garment Market's competition and becoming increasingly conspicuous of contradictions such as batch is little, wide in variety, friendship phase weak point; the manufacturing present situation of home clothing obviously can not adapt to the requirement of clothes industry high efficiency, scale, low-cost development; the development that this has not only restricted enterprise self also makes whole industry be in extremely disadvantageous status in the competition of international clothes processing market.
The intelligent material allocation device that present home clothing manufacturing enterprise has adopted is mostly from external import, and this device is made up of an oval main orbit and a plurality of work station usually, as shown in Figure 1.Work station is assigned different roles, also promptly has different functions, as preparing the station, processing station and end station etc.Dress material to be processed is hung on the suspension bracket, reach the standard grade by preparing the station, enter main orbit, each suspension bracket all has a unique sign to discern and to locate this suspension bracket.Equidistantly distributing many gap on the main orbit, promoting suspension bracket by these gap and move on main orbit, guarantee system's operate as normal, each gap can only promote a suspension bracket.
The intelligent material allocation device is provided with the monitoring system that comprises host computer, according in the upper computer software to the setting of suspension bracket work flow, the signal that collects in real time with the device that is used to discern the suspension bracket sign on the track, host computer can be followed the tracks of the operation of suspension bracket and judge which work station suspension bracket should enter and process, transmit control signal to control appliance then, driving device equipment control suspension bracket enters the corresponding work station.Dress material on suspension bracket has been finished the man-hour that adds at the relevant work station, suspension bracket is got back to continued on the backbone along the backbone operation, thereby finish remaining work flow.Owing to will guarantee that each gap can only promote a suspension bracket at most on the backbone, therefore at suspension bracket when a rail enters backbone, need judge on the backbone gap of exit whether suspension bracket is arranged.If have, the suspension bracket that then props up on the rail can not be gone up backbone; Otherwise the suspension bracket on the rail can safety enters backbone, is called for short merger.
The intelligent material allocation device not only costs an arm and a leg, and there is following technical problem in its existing method for supervising:
1, in material identification and control, adopt common bar codes technique to realize.But bar code recognition exists significant disadvantages: at first, bar code recognition speed is slow, can only discern in inactive state basically; Secondly, the discrimination of bar code is lower, situation about can't discern occurs through regular meeting, and after long-term the use, the bar code on the material is fuzzy easily, causes recognition failures, causes the system failure.Therefore, the serious restriction of the use of bar codes technique the whole system performance that can reach.
2, existing automation clothing production line solves the merger problem and adopts electric eye to detect gap and suspension bracket more, this method poor anti jamming capability, and to the environment requirement height, in case the workman unintentionally electric eye is covered or dust covers electric eye, then system will lose efficacy.
Summary of the invention
At the problems referred to above, the invention provides a kind of method for supervising and system of intelligent material allocation, can carry out efficient and intelligent management to the material allocation process.
Above-mentioned purpose of the present invention is achieved by the following technical solutions:
A kind of method for supervising of intelligent material allocation, its step comprises:
(1) is equipped with radio frequency identification RFID label on each suspension bracket that orbits, when the RFID card reader before certain work station ENTRANCE of suspension bracket process, this card reader can be read the information on the suspension bracket label, sends to host computer via station terminal equipment;
(2) after host computer receives the suspension bracket detection signal, can judge whether this suspension bracket should enter this work station and process, if should not enter this work station, then host computer does not send any signal, suspension bracket continues to move on main orbit; If should enter this work station, then host computer is to programmable logic controller (PLC) (Programmable Logic Controller, hereinafter to be referred as PLC) one rail connection signal of transmission, PLC controls the relevant work website after receiving this signal the switch that enters the station closes, and makes suspension bracket be entered work station;
(3) after the dress material on the suspension bracket was finished the processing of corresponding operation at certain work station, station terminal equipment sent one to host computer and machines signal, by electric switch this suspension bracket is sent into the departures buffering area simultaneously.
Step 3 further comprises:
(1) after host computer receives and machines signal, can send an exit signal to PLC, information such as corresponding Site ID and type of action are passed to PLC, PLC can upgrade the departures buffer size of respective site after receiving this signal;
(2) be uniform-distribution with many gap on the main orbit, suspension bracket is being promoted to orbit by gap, each gap is all sticked the RFID label, after gap detection card reader detects gap, just send a gap detection signal to host computer by terminal device, after host computer was received this signal, just to all website control PLC broadcasting gap detection signals, whether PLC was that departures buffer size empty, memory determines whether connecting a rail according to gap.
Further comprise: when PLC had detected gap, the metal that utilizes the work station exit to be provided with judged near switch whether this gap has suspension bracket, does not have suspension bracket as gap, connected the electric switch of exit, and a suspension bracket in the departures buffering area is sent into main orbit.
A kind of monitoring system of intelligent material allocation comprises:
Host computer, the control centre of whole intelligent material allocation device;
The terminal device of work station is with upper machine communication; The RFID label all posts a RFID label on each suspension bracket and gap, be used for this suspension bracket of unique identification or gap;
The RFID card reader reads the electronic information on the RFID label, and sends host computer to by terminal device;
PLC accepts the communication signal of host computer, and the closure into and out of the station switch of control respective site makes suspension bracket enter work station or enters main orbit.
Comprise that further each work station is provided with two RFID card reader, before being placed on the ENTRANCE and work station departures buffering area of work station respectively, the card reader that is arranged on the work station ENTRANCE will be uploaded to host computer through its suspension bracket information, be arranged on the suspension bracket information that the card reader before the work station departures buffering area will machine and be uploaded to host computer in this work station.
Further be uniform-distribution with many gap on the main orbit, suspension bracket is being promoted to orbit by gap, posts the RFID label on each gap, and sets up a RFID card reader, and this card reader is used for detecting gap.
An inductance approach switch further is set in the exit of work station, is used to detect suspension bracket, when suspension bracket enters detection range, send pulse signal.
Advantage of the present invention and technique effect
The present invention in actual applications, the RFID label is attached to object surfaces to be identified, card reader can read and discern the electronic data of being preserved in the RFID label contactlessly, apace, thereby reaches the purpose of automatic identification body.Usually card reader links to each other with host computer, and the label information that is read is sent on the host computer and is for further processing.Thereby the informationization of material and identification have fast and accurately been realized effectively.
By adopting REID that the material allocation process is carried out real-time tracking, send control command from host computer, can directly control the switch of material allocation device.
The present invention further sticks the RFID label with each gap, uses a special RFID card reader to detect these gap then.After gap detection card reader detects gap, just send a gap detection signal to host computer by terminal device, after host computer is received this signal, just to the PLC of all work stations broadcasting gap detection signal, PLC judges according to whether having in the specified time near the signal of switch whether gap is empty, and memory based departures buffer size determines whether connecting a rail simultaneously after receiving the gap detection signal.Thereby solved the problem of suspension bracket merger effectively.
Description of drawings
Fig. 1 is an intelligent material allocation device schematic diagram;
Fig. 2 is the method for supervising schematic diagram of intelligent material allocation of the present invention;
Fig. 3 is the monitoring system schematic diagram of intelligent material allocation work station of the present invention;
Fig. 4 is the monitoring system schematic diagram of intelligent material allocation gap of the present invention.
The specific embodiment
With reference to figure 3, the setting of each work station is explained as follows:
1. terminal device is by CAN bus and upper machine communication.
2. two RFID card reader (being Reader), one is placed in before the ENTRANCE, and another is placed in before the departures buffering area.The signal of these two card reader sends to host computer by terminal device with the frame format that defines.
3.PLC (Programmable Logic Controller, programmable logic controller) is by the control signal of RS485 interface reception host computer; Reception is near the pulse signal of switch; Output switching value signal, the action of control plant equipment.
4. inductance approach switch, be placed in exit certain position (concrete location parameter need decide according to the setting at scene) before, detect metal object (being suspension bracket in the native system), when metal object enters detection range, send pulse signal.
The communication frames form of host computer and terminal device:
In the system shown in the communication signal of all host computers and the terminal device table composed as follows.Signal frame is made up of three information fields: type field, website territory and content territory.
| The signal type territory | Website territory (source/point of destination ID) | The content length of field | The signal content territory |
Type field: all signal Unified coding in order to distinguish the signal classification, take 1 byte.
Website territory: 2 bytes.
To up (terminal-host computer) signal, the website territory is the Source Site ID that sends signal;
To descending (host computer-terminal) signal, the website territory is the purpose Site ID of received signal;
Content length of field: scope 0-7 takies 1 byte.
Content territory:, take the 0-7 byte in order to indicate the detailed meanings of each signal.
Concrete workflow
With reference to figure 1, Fig. 2, be uniform-distribution with many gap on the main orbit, suspension bracket is being promoted to orbit by gap.A RFID label is all arranged on each suspension bracket, when the card reader (being the A1 shown in Fig. 3) before certain website ENTRANCE of suspension bracket process, this card reader can be read the information on the suspension bracket label, sends to host computer via terminal device with the signal format that defines.Specify as follows to this signal:
Describe: when the card reader on the main line detects a suspension bracket, send this signal notice host computer by terminal device.
Direction: up; Type field: 07; Website territory: the Site ID (source address) at the card reader place that is triggered;
Content length of field: 03; Command context: 9D (1 confirms byte)+suspension bracket ID (2 byte).
After host computer receives the suspension bracket detection signal, can judge whether this suspension bracket should enter this work station and process according to corresponding dispatching algorithm.If should not enter this work station, then host computer does not send any signal, and suspension bracket continues to move on main orbit; If should enter this work station, then host computer sends one rail connection signal to PLC, information such as corresponding Site ID and type of action are passed to PLC, and PLC controls respective site after receiving this signal the switch that enters the station closes, and makes suspension bracket be entered work station.
After dress material on the suspension bracket is finished the processing of corresponding operation at certain work station, trade union sends one by terminal device to host computer and machines signal (the card reader A2 of the information on the suspension bracket RFID label before by the departures buffering area obtains), by electric switch this suspension bracket is sent into the departures buffering area simultaneously.Specify as follows to this signal:
Describe: on the website when front hanger is processed finish after, worker's button sends this signal and notifies host computer.This signal is general only effective to processing station.
Direction: up; Type field: 09; Website territory: the ID (source address) of suspension bracket place website; Content length of field: 03; Command context: D9 (1 confirms byte)+suspension bracket ID (2 byte)
After host computer receives and machines signal, can send an exit signal to PLC, information such as corresponding Site ID and type of action are passed to PLC, and PLC can upgrade the departures buffer size (PLC has write down the quantity of suspension bracket in the departures buffering area) of respective site after receiving this signal.Specifically, when receiving the exit signal that host computer sends, the suspension bracket quantity that respective site is set off in the buffering area adds 1.When PLC sent a suspension bracket into backbone according to the gap detection signal with near the electric switch of switching signal decision action exit, the suspension bracket quantity that respective site is set off in the buffering area subtracted 1.
Owing to will guarantee that each gap can only promote a suspension bracket at most on the backbone, therefore at suspension bracket when a rail enters backbone, need judge on the backbone gap of exit whether suspension bracket is arranged.If have, the suspension bracket that then props up on the rail can not be gone up backbone; Otherwise the suspension bracket on the rail can safety enters backbone.Suspension bracket merger problem that Here it is.
Being head it off, at first is the orientation problem that solves gap.Each gap is all sticked the RFID label, use a special RFID card reader to detect these gap then.Because gap all is equally distributed on whole main orbit, therefore place this gap in position and detect card reader, in the time of can guaranteeing to detect gap, the exit front specific location of each work station all has a gap to arrive at every turn.As shown in Figure 4.
After gap detection card reader detects gap, just send a gap detection signal to host computer by terminal device, specifying of this signal is as follows:
Describe: when the gap of main orbit detects card reader and detected gap and pass through, just detect the gap signal to one of host computer transmission by operating terminal.
Direction: up; Type field: 15; Website territory: gap checkout equipment Site ID (source address); Content length of field: 03; Command context: F8 (1 confirm byte)+the detect ID (2 byte) of gap.
After host computer is received this signal, just to all website control PLC broadcasting gap detection signals, PLC judges according to whether having in the specified time near the signal of switch whether gap is empty, and memory based departures buffer size determines whether connecting a rail simultaneously.Wherein inductance approach switch can detect metal object, and on production line, the connecting rod of suspension bracket is metal, therefore, can detect near switch whether the suspension bracket process is arranged.Concrete condition is divided following four kinds:
1, when detecting gap but this gap when not having suspension bracket and this work station to remain to be entered the suspension bracket (the suspension bracket quantity in the buffering area that promptly sets off greater than zero) of main orbit, there is not signal to give PLC near switch, connect the electric switch of exit this moment, a suspension bracket in the departures buffering area is sent into main orbit, automatically reset behind the connection Preset Time.
2, when detecting gap but this gap when not having suspension bracket and this work station not to treat the suspension bracket of main orbit does not have the switching value signal to give PLC near switch, PLC is action not.
3, when detecting gap but this gap when having suspension bracket and this work station to remain the suspension bracket of main orbit is given switching value signal of PLC near switch, PLC is action not.
4, when detecting gap but this gap when having suspension bracket and this work station not to treat the suspension bracket of main orbit is given switching value signal of PLC near switch, PLC is action not.
In sum, the invention discloses a kind of method for supervising and system of intelligent material allocation.Above-described application scenarios and embodiment are not to be used to limit the present invention, and any those skilled in the art without departing from the spirit and scope of the present invention, can do various changes and retouching, so protection scope of the present invention is looked the claim scope and defined.
Claims (7)
1, a kind of method for supervising of intelligent material allocation, its step comprises:
(1) is equipped with a radio frequency identification RFID label on each suspension bracket that orbits, when the RFID card reader before certain work station ENTRANCE of suspension bracket process, this card reader can be read the information on the suspension bracket label, sends to host computer via station terminal equipment;
(2) after host computer receives the suspension bracket detection signal, can judge whether this suspension bracket should enter this work station and process, if should not enter this work station, then host computer does not send any signal, suspension bracket continues to move on main orbit; If should enter this work station, then host computer sends one rail connection signal to programmable logic controller (PLC) PLC, programmable logic controller (PLC) PLC controls the relevant work website after receiving this signal the switch that enters the station closes, and makes suspension bracket be entered work station;
(3) after the dress material on the suspension bracket was finished the processing of corresponding operation at certain work station, station terminal equipment sent one to host computer and machines signal, by electric switch this suspension bracket is sent into the departures buffering area simultaneously.
2, the method for supervising of intelligent material allocation as claimed in claim 1, it is characterized in that: step 3 further comprises:
After (2-1) host computer receives and machines signal, can send an exit signal to programmable logic controller (PLC) PLC, corresponding Site ID and type of action information are passed to programmable logic controller (PLC) PLC, and programmable logic controller (PLC) PLC can upgrade the departures buffer size of respective site after receiving this signal;
(2-2) be uniform-distribution with many gap on the main orbit, suspension bracket is being promoted to move on main orbit by gap, each gap is all sticked the RFID label, after gap detection card reader detects gap, just send a gap detection signal to host computer by terminal device, after host computer is received this signal, just to all website control programmable logic controller (PLC) PLC broadcasting gap detection signal, whether programmable logic controller (PLC) PLC is that departures buffer size empty, memory determines whether connecting a rail according to gap after receiving this signal.
3, the method for supervising of intelligent material allocation as claimed in claim 2, it is characterized in that: step (2-2) further comprises: when programmable logic controller (PLC) PLC has detected gap, the metal that utilizes the work station exit to be provided with judges near switch whether this gap has suspension bracket, there is not suspension bracket as gap, connect the electric switch of exit, a suspension bracket in the departures buffering area is sent into main orbit.
4, a kind of monitoring system of intelligent material allocation comprises:
(1) host computer, the control centre of whole intelligent material allocation device;
(2) station terminal equipment is with upper machine communication;
(3) RFID label all posts a RFID label on each suspension bracket, be used for this suspension bracket of unique identification;
(4) RFID card reader reads the electronic information on the RFID label, and sends host computer to by terminal device;
(5) programmable logic controller (PLC) PLC accepts the communication signal of host computer, and the closure into and out of the station switch of control respective site makes suspension bracket enter work station or enters main orbit.
5, the monitoring system of intelligent material allocation as claimed in claim 4, it is characterized in that: each work station is provided with two RFID card reader, before being placed on the ENTRANCE and work station departures buffering area of work station respectively, the card reader that is arranged on the work station ENTRANCE will be uploaded to host computer through its suspension bracket information, be arranged on the suspension bracket information that the card reader before the work station departures buffering area will machine and be uploaded to host computer in this work station.
6, as the monitoring system of claim 4 or 5 described intelligent material allocations, it is characterized in that: be uniform-distribution with many gap on the main orbit, suspension bracket is being promoted to move on main orbit by gap, on each gap, post the RFID label, and set up a RFID card reader, this card reader is used for detecting gap.
7, as the monitoring system of claim 4 or 5 described intelligent material allocations, it is characterized in that: an inductance approach switch is set in the exit of work station, is used to detect suspension bracket, when suspension bracket enters detection range, send pulse signal.
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