RF identification exchange method and radio-frequency recognition systemTechnical field
The present invention relates to wireless communication field, be specifically related to a kind of RF identification exchange method and radio-frequency recognition system.
Background technology
RF identification (RFID, Radio Frequency Identify) system includes label and read write line.It is a kind of non-The automatic identification technology of contact, it automatically identifies destination object and is obtained related data by radiofrequency signal, identify work withoutPalpus manual intervention, is operable with various adverse circumstances.RFID technique can recognize that high-speed moving object and can identify multiple mark simultaneouslySign, swift and convenient to operate.
Radio-frequency recognition system includes passive radio frequency identification and active radio frequency identification, and both essential distinctions are in tab end.BeforePerson's label is acquisition energy from read write line transmitted waveform, and the latter's label self has energy supply.
Low Level Reader Protocol (LLRP) agreement is between rfid interrogator and rf subscriber terminalProtocol interface, why be referred to as low layer, be because it providing the control of RFID radio frequency protocol, i.e. provide radio frequency protocolThe function accessed and control, it has a following features:
(1) provide method to control read write line and read EPC (Elect ronic Product Code) information
And out of Memory, write data in label, and perform to depend on other order of agreement,
Such as kill and lock in EPC C1G2.
(2) healthy and strong state report and error handling mechanism are provided.
(3) function of the wireless transmission protocol that offer extension is new.
(4) ability of read write line equipment is obtained.
In the EPC network architecture of Universal Product electronic code administrative center (EPCglobal) organization definition, LLRP agreementFiltering between collecting layer and read write line layer, serving as the effect of a medium.The protocol provides for one to use between radio frequencyStandard interface between family terminal and read write line, different manufacturers can issue the read-write of corresponding Message Opcode according to actual sceneDevice, thus achieves the standardization of read write line interface.
Operation between read write line and label is mainly checked, reading and writing.Check the EPC code obtaining field interior label exactly, readWith write the label being to check, specific memory block is written and read operation.And then realize practical business demand.Radio frequency is usedFamily terminal is by issuing LLRP message to read write line, it is achieved read write line above-mentioned functions.In inventory operation, rf subscriber terminal needsDELETE_ROSPEC, ADD_ROSPEC, ENABLE_ROSPEC and START_ROSPEC message to be issued；In read-write operation,Rf subscriber terminal need to issue DELETE_ROSPEC, DELETE_ACCESSSPEC, ADD_ROSPEC, ENABLE_ROSPEC,ADD_ACCESSSPEC, ENABLE_ACCESSSPEC and START_ROSPEC message.Referring to Fig. 1, Fig. 1 is existing LLRPAccess operation (AO) state transition figure that standard agreement is given.Rf subscriber terminal mainly has disappearing of four relevant AO with read write lineBreath, i.e. adds AO Rules Message (ADD_ACCESS), enable AO Rules Message (ENABLE_ACCESS), goes to enable AO message(DISABLE_ACCESS), AO Rules Message (DELETE_ACCESS) is deleted.After read write line receives the message of ADD_ACCESSAO is in and is not enabled on (DISABLE) state；It is in the AO of DISABLE state, receives enable AO that rf subscriber terminal issuesAfter message (ENABLE_ACCESS) message, state transition is to (ACTIVE) state of activation, and the AO being only in this state just can enterRow read-writes etc. access operation；It is in the AO of ACTIVE state, receives the DISABLE_ACCESS message that rf subscriber terminal issuesAfter, state transition is to DISABLE state；Be in the AO of DISABLE and ACTIVE, receive DELETE_ACCESS message orWhen stopping access operating condition (AccessStopCondition) and meeting, the end lives cycle.
From the foregoing, it will be observed that the read-write etc. before rf subscriber terminal to be realized and read write line accesses operation, it is necessary to make the work of AOIt is active as state, and when being at state of activation, the AO message that rf subscriber terminal issues includes adding AO ruleThen message and enable AO Rules Message, only after receiving enable AO Rules Message, just can be transformed into state of activation, rf subscriberInteracting message between terminal and read write line is more, and inefficient, greatly reduces the satisfaction of Consumer's Experience.
Summary of the invention
The main technical problem to be solved in the present invention is to provide a kind of RF identification exchange method and radio-frequency recognition system,The number of times of interaction message between rf subscriber terminal and read write line can be reduced, simplify interaction flow, improve treatment effeciency, Jin ErtiThe satisfaction of high Consumer's Experience.
For solving above-mentioned technical problem, the present invention provides a kind of RF identification exchange method, including:
Rf subscriber terminal transmission interpolation access operation rules message is to read write line, and described interpolation accesses operation rules messageIncluding accessing operational attribute information, described access operational attribute information includes for indicating the work shape accessing operation element stateState parameter, it is state of activation that the instruction of described working status parameter accesses operation element state；
After read write line receives described access operation rules message, add and access operation rules accordingly, and access is graspedThe duty made is set to state of activation.
In an embodiment of the present invention, described read write line receives described after adding access operation rules message, willBefore the duty of access operation is set to state of activation, also include the step that described working status parameter is verified,As being verified, then the duty accessing operation is set to state of activation.
In an embodiment of the present invention, described rf subscriber terminal sends to add and accesses operation rules message to read-writeBefore device, also include sending and add reading operations Rules Message to described read write line；Described read write line receives described interpolation and readsAfter read operation Rules Message, add corresponding reading operations rule, and feed back interpolation reading operations rule respond to described radio frequencyUser terminal, now the duty of reading operations is for being not enabled on state.
In an embodiment of the present invention, described in described rf subscriber terminal single reference during read write line, described radio frequencyUser send interpolation reading operations Rules Message to described read write line after；Also include sending and enable reading operations message to describedRead write line；After described read write line receives described enable reading operations message, it is set to not swash by the duty of reading operationsLive state, and feed back enable reading operations respond to described rf subscriber terminal；Described rf subscriber terminal makes described in receivingAfter energy reading operations response, send and activate reading operations message to described read write line；Described read write line receives described activation and readsAfter read operation message, the duty of reading operations is set to state of activation, and feeds back activation reading operations and respond to describedRf subscriber terminal.
In an embodiment of the present invention, during the described read write line of access of described rf subscriber terminal periodic, describedAfter rf subscriber transmission interpolation reading operations Rules Message is to described read write line；Also include send enable reading operations message toDescribed read write line；After described read write line receives described enable reading operations message, the duty of reading operations is set toState of activation, and feed back enable reading operations respond to described rf subscriber terminal.
In an embodiment of the present invention, described access operational attribute information also includes the ID parameter accessing operation, visitsAsk the stop condition of operation；After described read write line receives described access operation rules message, also include accessing operation to describedID parameter, access operation stop condition verify, as being verified, and described working status parameter checking also by,Then described operational attribute information is added in the storage queue accessing operation, and by described operational attribute information or described operationThe call number of attribute information is added in coupling queue, and feedback adds access operation rules success response to described rf subscriber eventuallyEnd.
In an embodiment of the present invention, when the described stop condition accessing operation meets；, described read write line stopsAccess operation, the described duty accessing operation is set to halted state.
In an embodiment of the present invention, described read write line receives the deletion access operation that rf subscriber terminal sendsAfter Rules Message, the described duty accessing operation is set to halted state.
In an embodiment of the present invention, described rf subscriber terminal sends to add and accesses operation rules message to read-writeBefore device, also include sending deletion reading Rules Message and deletion accesses operation rules message to described read write line；Described read-writeDevice receives described deletion and reads Rules Message and deleting and access after operation rules message, delete corresponding reading operations rule andAccess operation rules, and feed back deletion read rule response and delete access operation rules respond to rf subscriber terminal.
Present invention also offers a kind of radio-frequency recognition system, including rf subscriber terminal and read write line:
Described rf subscriber terminal is used for sending interpolation and accesses operation rules message to read write line, and described interpolation accesses operationRules Message includes accessing operational attribute information, and described access operational attribute information includes for indicating access operation element stateWorking status parameter, described working status parameter instruction access duty be state of activation；
After described read write line is used for receiving described access operation rules message, adds and access operation rules accordingly, feedbackAdd access operation rules and respond to described rf subscriber terminal, and the duty accessing operation is set to state of activation.
In an embodiment of the present invention, described read write line be additionally operable to receive described add access operation rules disappearAfter breath, before the duty accessing operation is set to state of activation, described working status parameter is verified, and is testingDemonstrate,prove by time, by access operation duty be set to state of activation.
In an embodiment of the present invention, described rf subscriber terminal is additionally operable to disappear at transmission interpolation access operation rulesBefore breath is to read write line, sends and add reading operations Rules Message to described read write line；Described read write line is additionally operable to receivingAfter described interpolation reading operations Rules Message, add corresponding reading operations rule, and the duty arranging reading operations isBeing not enabled on state, feedback is added reading operations rule and is responded to described rf subscriber terminal.
In an embodiment of the present invention, described rf subscriber terminal is additionally operable to read write line described in single reference, is sending outAfter sending interpolation reading operations Rules Message to described read write line；Also send enable reading operations message to described read write line, andAfter receiving the response of described enable reading operations, send and activate reading operations message to described read write line；Described read write line is alsoAfter receiving described enable reading operations message, the duty of reading operations is set to unactivated state, and feeds backEnable reading operations and respond to described rf subscriber terminal；It is additionally operable to receive described read write line and receives described activation reading behaviourAfter making message, the duty of reading operations is set to state of activation, and feeds back activation reading operations and respond to described radio frequencyUser terminal.
In an embodiment of the present invention, described rf subscriber terminal is additionally operable to periodically access described read write line,After transmission interpolation reading operations Rules Message is to described read write line；Send and enable reading operations message to described read write line；After described read write line is additionally operable to receive described enable reading operations message, it is set to the duty of reading operations activate shapeState, and feed back enable reading operations respond to described rf subscriber terminal.
In an embodiment of the present invention, described access operational attribute information also includes the ID parameter accessing operation, visitsAsk the stop condition of operation；Described read write line is additionally operable to after receiving described access operation rules message, accesses behaviour to describedThe ID parameter made, the stop condition accessing operation is verified, as being verified, and the checking of described working status parameter is also led toCross, described operational attribute information is added to the storage queue accessing operation and mates in queue, feed back to add to access to operate and adviseThen respond to described rf subscriber terminal.
In an embodiment of the present invention, described rf subscriber terminal is additionally operable to disappear at transmission interpolation access operation rulesBefore breath is to read write line, sends deletion reading Rules Message with deleting and access operation rules message to described read write line；Described readingWrite device be additionally operable to receive described delete read Rules Message and delete and access operation rules message after, delete and read behaviour accordinglyMake rule and access operation rules, and feeding back deletion and read rule response and delete and access operation rules and respond to rf subscriber eventuallyEnd.
The invention has the beneficial effects as follows: in the present invention, rf subscriber terminal is sent to interpolation access operation (AO) of read write lineRules Message includes accessing operational attribute information, and this access operational attribute information includes for indicating access operation element stateWorking status parameter, and this working status parameter instruction access duty be state of activation；Therefore read write line is connected on and receivesAdd after accessing operation rules message, directly the duty accessing operation can be set to state of activation.The most in the present invention,Reading and writing at read write line, lock, stop (or referred to as killing) etc. when accessing operation, the AO that rf subscriber terminal issues is relevantA kind of state of information, i.e. activates (ACTIVE) state, and the interpolation that read write line issues upon receipt of rf subscriber terminal is visitedAsk operation rules message, just directly the duty of AO is set to state of activation, and is not set to as existing LLRP agreementIt is not enabled on (DISABLE) state, therefore need not ENABLE_ACCESS message and it is activated, therefore the method for the present inventionThe agreement proposed need not mutual ENABLE_ACCESS message between rf subscriber terminal and read write line, decreases the two itBetween the number of times of interacting message, simplify interaction flow, improve the efficiency that system processes, and then substantially increase Consumer's ExperienceSatisfaction.
Accompanying drawing explanation
Fig. 1 is the AO state transition figure that LLRP standard agreement is given；
Fig. 2 is the AO state transition figure of an embodiment of the present invention；
Fig. 3 be LLRP standard agreement be given single reference operation time rf subscriber terminal and read write line between message hand overFigure mutually；
When Fig. 4 is the single reference operation of an embodiment of the present invention, the message between rf subscriber terminal and read write line is handed overFigure mutually；
Fig. 5 is the disappearing between rf subscriber terminal and read write line when periodically accessing operation that LLRP standard agreement is givenBreath interaction figure；
Fig. 6 is the disappearing between rf subscriber terminal and read write line when periodically accessing operation of an embodiment of the present inventionBreath interaction figure；
Fig. 7 is the process chart that the rf subscriber terminal of an embodiment of the present invention receives ADD_ACCESS message；
Fig. 8 is that the read write line of an embodiment of the present invention accesses operational flowchart.
Detailed description of the invention
Combine accompanying drawing below by detailed description of the invention the present invention is described in further detail.
The RF identification exchange method that the present embodiment provides comprises the following steps:
Rf subscriber terminal sends to add and accesses operation rules message (ADD_ACCESSSPEC) to read write line, this ADD_ACCESSSPEC includes accessing operational attribute information, accesses operational attribute information and includes for indicating access operation (AO) work shapeThe working status parameter of state, the working status parameter instruction AO duty in this example is state of activation；
After read write line receives ADD_ACCESSSPEC, add and access operation rules accordingly, and by the duty of AOIt is set to state of activation.
The most in this example, read write line reads and writes, lock, stop (or referred to as killing) etc. when accessing operation, and rf subscriber is eventuallyA kind of state of information relevant for the AO that end issues, i.e. activates (ACTIVE) state, and read write line is upon receipt of rf subscriberThe interpolation that terminal issues accesses operation rules message, and the duty of AO is the most directly set to state of activation, and not as existingThere is LLRP agreement to be set to be not enabled on (DISABLE) state, therefore need not ENABLE_ACCESS message and it is activated,The number of times of interacting message between rf subscriber terminal and read write line can be reduced, and then interaction flow therebetween can be simplified, carryThe efficiency that high system processes, and then substantially increase the satisfaction of Consumer's Experience.
In this example, after read write line receives ADD_ACCESSSPEC, the duty of AO is set to state of activation itBefore, also include ADD_ACCESSSPEC is accessed what the working status parameter of operational attribute information was verified, as checking is logicalCross, just the duty accessing operation is set to state of activation, to read and write, to lock, to stop access operations such as (killing).
In this example, before rf subscriber terminal transmission ADD_ACCESSSPEC is to read write line, also include that sending interpolation readsRead operation Rules Message (ADD_ROSPEC) gives read write line；After read write line receives ADD_ROSPEC, add and read behaviour accordinglyMake (RO) rule, and feed back interpolation reading operations rule response (ADD_ROSPEC_RESPONSE) give rf subscriber terminal, nowThe duty of RO is for being not enabled on state, and activates the work shape of RO according to the concrete condition of rf subscriber terminal access read write lineState, specific as follows:
When rf subscriber terminal single reference read write line, after rf subscriber transmission ADD_ROSPEC is to read write line；AlsoReading operations message (ENABLE_ROSPEC) is enabled to read write line including sending；After read write line receives ENABLE_ROSPEC,The duty of RO is set to unactivated state, and feeds back enable reading operations response (ENABLE_ROSPEC_RESPONSE)To rf subscriber terminal；After rf subscriber terminal receives ENABLE_ROSPEC_RESPONSE, send activation reading operations and disappearBreath (START_ROSPEC) gives read write line；After read write line receives START_ROSPEC, it is set to the duty of RO activateState, and feed back activation reading operations respond to described rf subscriber terminal.
When the access read write line of rf subscriber terminal periodic, rf subscriber send ADD_ROSPEC to read write line itAfter；Also include sending and enable reading operations message (ENABLE_ROSPEC) to read write line；Read write line receives ENABLE_After ROSPEC, the duty of RO is set to state of activation, and feeds back enable reading operations response (ENABLE_ROSPEC_RESPONSE) rf subscriber terminal is given.
In this example, the operational attribute information that accesses of ADD_ACCESSSPEC also includes the ID parameter accessing operation, accesses operationStop condition；After read write line receives ADD_ACCESSSPEC, also include accessing the parameter (example that operational attribute information includesAs accessed the ID parameter of operation, access the stop condition of operation) verify, as being verified, and above-mentioned working status parameterVerify also by, then ADD_ACCESSSPEC operational attribute information is added in the storage queue accessing operation, and shouldThe call number of ADD_ACCESSSPEC operational attribute information or this ADD_ACCESSSPEC operational attribute information adds coupling team toIn row, feedback adds access operation rules success response to rf subscriber terminal.
When the stop condition accessing operation that ADD_ACCESSSPEC carries meets；Read write line will access the work of operationState is set to halted state.
In this example, read write line receives the deletion access operation rules message (DELETE_ that rf subscriber terminal sendsACCESSSPEC), after, the duty of AO is set to halted state.
Before rf subscriber terminal transmission interpolation access operation rules message is to read write line, also include that sending deletion reading advisesAt the beginning of then message (DELETE_ROSPEC) and deletion access operation rules message (DELETE_ACCESSSPEC) are carried out to read write lineBeginning process, for by AO rule used during last visit and RO redundant rule elimination；Read write line receive DELETE_ROSPEC andAfter DELETE_ACCESSSPEC, delete corresponding RO rule and AO rule, and feed back deletion reading rule response (DELETE_ROSPEC_RESPONSE) access operation rules respond (DELETE_ACCESSSPEC_RESPONSE) to rf subscriber with deletionTerminal.
This example additionally provides a kind of radio-frequency recognition system, including rf subscriber terminal and read write line, rf subscriber terminalRealize RF identification with read write line as stated above and the most complete corresponding feature operation.Below in conjunction with concrete accompanying drawing to thisInvention is described further.
Refer to Fig. 2, Fig. 2 and show the AO state transition figure realized according to said method, rf subscriber terminal and read-writeInteraction message relevant for two AO, i.e. ADD_ACCESS message, DELETE_ACCESS message is mainly had between device.Work as read write lineAfter receiving ADD_ACCESS message, read write line arranges the duty of AO and is in activation (ACTIVE) state；It is in this stateAO just can be written and read waiting accessing operation；It is in the AO of ACTIVE state, is receiving DELETE_ACCESS message or accessing behaviourAfter the AccessStopCondition that the stop condition made issues when meeting, read write line arranges the duty of AO for stopping shapeState, thus end lives cycle.Visible, relative to the LLRP agreement of standard, the method provided in this example simplifies rf subscriberThe interaction times of AO message and interaction flow between terminal and read write line, by the original state that is not enabled on and activated shape by AO stateState is reduced to only one of which state, i.e. state of activation；Compared to Figure 1, it is no longer necessary to mutual ENABLE_ACCESS, DISABLE_ACCESS message, improves work efficiency and the system access performance of read write line.
Refer to Fig. 3, this figure show LLRP standard agreement complete during single reference rf subscriber terminal and read write line itBetween message interaction process schematic diagram, have seven pairs of interacting messages between rf subscriber terminal and read write line and could realize read write lineAccess operation, wherein: there have at initial phase to be two right, the deletion RO Rules Message that respectively rf subscriber terminal sendsDELETE_ROSPEC, deletion AO Rules Message DELETE_ACCESSSPEC and the deletion RO rule response message of read write line feedbackDELETE_ROSPEC_RESPONSE, deletion AO rule response message DELETE_ACCESSSPEC_RESPONSE, at the beginning of above-mentionedAfter beginningization, rf subscriber terminal sends adds RO Rules Message ADD_ROSPEC, interpolation AO Rules Message ADD_ROSPEC to readingWriting device, read write line carries out the interpolation of respective rule and processes after receiving, and feeds back interpolation RO rule response message ADD_ROSPEC_RESPONSE and interpolation AO rule response message ADD_ACCESSSPEC_RESPONSE is to rf subscriber terminal, AO work nowMake state for being not enabled on state DISABLE；Then rf subscriber terminal also needs to send enable RO message ENABLE_ROSPEC and makeThe duty of RO, to read write line, after read write line receives above-mentioned message, is set to by energy AO message ENABLE_ACCESSSPECUnactivated state, is set to state of activation by the duty of AO；And feed back enable RO rule response message ENABLE_ROSPEC_RESPONSE and enable AO rule response message ENABLE_ACCESSSPEC_RESPONSE is to read write line；Radio frequency is usedAfter family terminal receives above-mentioned two response message, also need to send activation reading operations message START_ROSPEC further to readingWrite device, after read write line receives this message, the duty of RO is set to state of activation.
Referring to Fig. 4, what this figure showed that this example provides completes during single reference between rf subscriber terminal and read write lineMessage interaction process schematic diagram, has six pairs of interacting messages and could realize the visit of read write line between rf subscriber terminal and read write lineAsk operation, wherein: there have at initial phase to be two right, the deletion RO Rules Message DELETE_ that respectively rf subscriber terminal sendsROSPEC, deletion AO Rules Message DELETE_ACCESSSPEC and the deletion RO rule response message DELETE_ of read write line feedbackROSPEC_RESPONSE, deletion AO rule response message DELETE_ACCESSSPEC_RESPONSE, after above-mentioned initialization,Rf subscriber terminal sends adds RO Rules Message ADD_ROSPEC, interpolation AO Rules Message ADD_ROSPEC to read write line, readingWrite the interpolation process carrying out respective rule after device receives, and feed back interpolation RO rule response message ADD_ROSPEC_RESPONSE and interpolation AO rule response message ADD_ACCESSSPEC_RESPONSE is to rf subscriber terminal, AO work nowMake state for activating ACTIVE state；Then rf subscriber terminal only need to send enable RO message ENABLE_ROSPEC to read-writeDevice, after read write line receives above-mentioned message, is set to the duty of RO unactivated state, and feeds back enable RO rule responseMessage ENABLE_ROSPEC_RESPONSE is to read write line；After rf subscriber terminal receives above-mentioned response message, send out furtherSend activation reading operations message START_ROSPEC to read write line, after read write line receives this message, the duty of RO is setIt is set to state of activation.START_ROSPEC message.Single reference mistake is being realized from the method provided in Fig. 3 and Fig. 4, this exampleCheng Zhong, decreases a pair information mutual, i.e. ENABLE_ACCESSSPEC and ENABLE_ACCESSSPEC_RESPONSE, thereforeSimplify interaction flow, the treatment effeciency of more conducively raising system.
Referring to Fig. 5, shown in this figure is that the periodic read-write etc. that LLRP standard agreement is given accesses operation radio frequency useInteracting message figure between family terminal and read write line, it differs only in Fig. 3's, receives ENABLE_ at read write lineAfter ROSPEC message, directly the duty of RO is set to state of activation, is not required to rf subscriber terminal and sends START_ROSPEC to read write line with activate RO duty.Message between rf subscriber terminal and read write line the most in the processThe most only six is right.
Referring to Fig. 6, the periodic read-write that this example shown in this figure is given etc. accesses operation rf subscriber terminal and read-writeInteracting message figure between device, it is also only in that with the difference of Fig. 4, after read write line receives ENABLE_ROSPEC message,Directly the duty of RO is set to state of activation, is not required to rf subscriber terminal and sends START_ROSPEC to read write lineTo activate the duty of RO, the most in the process the interacting message between rf subscriber terminal and read write line only have five right,Compared with the interaction shown in Fig. 5, decrease a pair information mutual, i.e. ENABLE_ACCESSSPEC and ENABLE_ACCESSSPEC_RESPONSE, therefore also simplify interaction flow, the treatment effeciency of more conducively raising system.
Refer to Fig. 7, shown in this figure be the read write line that this example is given receive rf subscriber terminal send ADD_ACCESSThe process chart of message.Read write line is after receiving the ADD_ACCESS message that client issues, to ADD_ACCESS messageAccess operational attribute information and include that each parameter (such as working status parameter, the ID parameter etc. of access operation) carries out parameter verification,If verification is correct, then access operational attribute information is saved in the storage queue of AO, owing to now AO is in ACTI VE state,The most also by access operational attribute information or access operational attribute information call number (such as subscript) be saved directly to AOJoining queue, add accessing operation rules success response to rf subscriber terminal feedback, now AO is in ACTIVE state, Ke YijinRow read-writes etc. access operation.If parameter verification mistake, then directly to the ADD_ACCESS_ of rf subscriber terminal feedback parameter errorRESPONSE responds.
Referring to Fig. 8, this figure is that the read write line that this example is given accesses operational flowchart.When read write line checks a labelAfter, first determine whether whether the coupling queue of AO is empty, if it is empty, then carry out lower whorl and check；If not empty, then tag access is carried outCoupling, matching content includes RO, antenna, agreement etc..If the match is successful, then can be written and read waiting accessing operation, otherwise carry outLower whorl is checked.
From the foregoing, it will be observed that present invention optimizes the duty of AO, decrease information amount of interaction, simplify information interactive streamJourney, improves the work efficiency of read write line and the access efficiency of system, and then improves the satisfaction of Consumer's Experience.
Above content is to combine specific embodiment further description made for the present invention, it is impossible to assert thisBright being embodied as is confined to these explanations.For general technical staff of the technical field of the invention, do not taking offOn the premise of present inventive concept, it is also possible to make some simple deduction or replace, all should be considered as belonging to the protection of the present inventionScope.