CN107040588A - A kind of anti-collision of distributed agriculture row expense control system is swiped the card method and device - Google Patents
A kind of anti-collision of distributed agriculture row expense control system is swiped the card method and device Download PDFInfo
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- CN107040588A CN107040588A CN201710150268.7A CN201710150268A CN107040588A CN 107040588 A CN107040588 A CN 107040588A CN 201710150268 A CN201710150268 A CN 201710150268A CN 107040588 A CN107040588 A CN 107040588A
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- 238000000034 method Methods 0.000 title claims abstract description 20
- 238000004891 communication Methods 0.000 claims abstract description 74
- 101100172132 Mus musculus Eif3a gene Proteins 0.000 claims abstract description 11
- 238000001514 detection method Methods 0.000 claims description 22
- 238000004364 calculation method Methods 0.000 claims description 19
- 101100517651 Caenorhabditis elegans num-1 gene Proteins 0.000 claims description 10
- 230000001680 brushing effect Effects 0.000 claims description 7
- 238000004080 punching Methods 0.000 claims 1
- 230000005540 biological transmission Effects 0.000 abstract description 8
- 230000003044 adaptive effect Effects 0.000 abstract description 6
- 230000005611 electricity Effects 0.000 description 5
- 230000001253 anti-conflict Effects 0.000 description 1
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W74/00—Wireless channel access
- H04W74/08—Non-scheduled access, e.g. ALOHA
- H04W74/0808—Non-scheduled access, e.g. ALOHA using carrier sensing, e.g. carrier sense multiple access [CSMA]
- H04W74/0825—Non-scheduled access, e.g. ALOHA using carrier sensing, e.g. carrier sense multiple access [CSMA] with collision detection
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- G—PHYSICS
- G07—CHECKING-DEVICES
- G07F—COIN-FREED OR LIKE APPARATUS
- G07F15/00—Coin-freed apparatus with meter-controlled dispensing of liquid, gas or electricity
- G07F15/003—Coin-freed apparatus with meter-controlled dispensing of liquid, gas or electricity for electricity
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- G—PHYSICS
- G07—CHECKING-DEVICES
- G07F—COIN-FREED OR LIKE APPARATUS
- G07F15/00—Coin-freed apparatus with meter-controlled dispensing of liquid, gas or electricity
- G07F15/06—Coin-freed apparatus with meter-controlled dispensing of liquid, gas or electricity with means for prepaying basic charges, e.g. rent for meters
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L67/00—Network arrangements or protocols for supporting network services or applications
- H04L67/01—Protocols
- H04L67/12—Protocols specially adapted for proprietary or special-purpose networking environments, e.g. medical networks, sensor networks, networks in vehicles or remote metering networks
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Abstract
Swiped the card method and device the present invention relates to a kind of anti-collision of distributed agriculture row expense control system, on the basis of CSMA/CA algorithms of the present invention, the influence of quantity and information transmission times to MacMinBE in view of equipment of swiping the card, according to it is preceding several times communicate when swipe the card equipment number of nodes weighted value and preceding letter several times keep out of the way number of times weighted value adjust MacMinBE numerical value, when equipment quantity of swiping the card be more than it is preceding communicate several times when swipe the card the weighted value of equipment number of nodes, and NB is more than preceding when letter keeps out of the way number of times weighted value several times, MacMinBE plus 1；When equipment quantity of swiping the card be less than it is preceding communicate several times when swipe the card the weighted value of equipment number of nodes, and NB is less than preceding when letter keeps out of the way number of times weighted value several times, subtracts 1 by MacMinBE.By said process, the present invention realizes MacMinBE adaptive adjustment, improves many and swipes the card equipment simultaneously and communication success rate when expense control terminal communication is arranged in agriculture, it is ensured that user's normally uses, and enhances Consumer's Experience sense.
Description
Technical field
Swiped the card method and device the present invention relates to a kind of anti-collision of distributed agriculture row expense control system, belong to electricity consumption charging skill
Art field.
Background technology
Farmland motor-pumped well irrigate as in China, a kind of maximally effective drought-resistant moisture-preserving in major grain producing area such as western and the north arranges
Apply, country puts into effect multinomial policy support and ensures agriculture row's engineering construction for years.Current agriculture row takes an agriculture row in control system
Expense control terminal can manage at least two motor-pumped wells, each motor-pumped well one electric energy meter of correspondence and an equipment of swiping the card, as shown in figure 1,
One agriculture row's expense control terminal manages N number of electric energy meter, N number of equipment and N number of external on-load switch, when in use, equipment of swiping the card of swiping the card
Obtain user's card information and user's card information is sent to agriculture row's expense control terminal, control terminal is taken by agriculture row user's card information is carried out
Processing, and result is sent to swipe the card equipment and, writing operation is completed by equipment of swiping the card, and control terminal take by agriculture row controlling
External on-load switch, realizes field irrigation.Agriculture row expense control terminal and equipment of swiping the card use micro power radio communication, and Dang Duotai swipes the card
Equipment can cause data transmission conflict when swiping the card simultaneously, in order to avoid such case, send before data, can all pass through CSMA/CA
(Carrier Sense Multiple Access/Collision Avoidance) mechanism competes the use of transmission medium
Power, when BLE domain of the mechanism in received beacon frame is 0, MAC is initialized as by index avoidance BE (Backoff exponent)
The MacMinBE values of layer, otherwise, BE values should be set to the small person in both 2 and MacMinBE, and MacMinBE as MAC layer most
Small index avoidance, once it is determined that, just no longer adjust so that random avoidance time slot below is also relatively fixed, in face of different numbers
The flexibility of equipment this method simultaneously and when expense control terminal communication is arranged in agriculture of swiping the card of amount is inadequate, easily causes equipment of swiping the card and swipes the card mistake
Lose, reduction many swipe the card equipment simultaneously and agriculture arrange expense control terminal communication when communication success rate, influence peasant household normally use.
The content of the invention
Swiped the card method it is an object of the invention to provide a kind of anti-collision of distributed agriculture row expense control system, to solve many brushes
The problem of card machine tool can cause data transmission conflict when swiping the card simultaneously；Take control system present invention also offers a kind of distributed agriculture row
Anti-collision brushing card device.
The present invention provides the anti-collision that a kind of distributed agriculture row takes control system to solve above-mentioned technical problem and swiped the card method,
This method comprises the following steps：
1) swiped the card when having and communicated several times before quantity, the number of preceding i communication node are determined according to current agriculture row brush card machine
The weighted value of equipment number of nodes；
2) number of times weighted value is kept out of the way in communication several times before determining；
3) weighted value of equipment number of nodes of being swiped the card when according to obtained preceding communication several times and preceding communication several times are kept out of the way
Number of times weighted value adjusts MacMinBE,
Work as N>NAveAnd NB>NBAveWhen meeting simultaneously, MacMinBE numerical value is added 1, MacMinBE=MacMinBE+1,
Work as N<NAveAnd NB<NBAveWhen meeting simultaneously, MacMinBE numerical value is subtracted 1, MacMinBE=MacMinBE-1,
Otherwise MacMinBE keeps constant,
Wherein N is the quantity for equipment of currently swiping the card, NAveFor it is preceding communicate several times when swipe the card the weighting of equipment number of nodes
Value, N is the retrogressing number of times for equipment of currently swiping the card, NBAveKeep out of the way number of times weighted value for preceding communication several times, MacMinBE is MAC layer
Minimum index avoidance；
4) control system is taken to distributed agriculture row according to the MacminBE values after adjustment and carries out collision detection.
Further, it is described it is preceding equipment number of nodes is swiped the card when communicating several times weighted value be：
Wherein NiFor the number of preceding i communication node, Num1 is empirical value, NAveSwiped the card equipment during for first Num1 times communication
The weighted value of number of nodes, αiFor nodes weight coefficient.
Further, number of times weighted value NB is kept out of the way in described preceding communication several timesAveFor：
Wherein NBAveKeep out of the way number of times weighted value, β for current Num2 times communicationiKeep out of the way number of times weight coefficient, NB for communicationiFor
Number of times is kept out of the way in preceding i communication.
Further, the step 4) use CSMA/CA collision detection algorithms.
Present invention also offers the anti-collision brushing card device that a kind of distributed agriculture row takes control system, the device includes the POS
Tool number of nodes weight calculation module, communication keep out of the way number of times weight calculation module, MacMinBE adjusting modules and conflict inspection
Survey module,
Described equipment number of nodes weight calculation module of swiping the card is used for having quantity, preceding i according to current agriculture row brush card machine
Swiped the card before the number of secondary communication node is determined during communication several times the weighted value of equipment number of nodes；
Described communication keeps out of the way number of times weight calculation module and is used to determine that number of times weighted value is kept out of the way in preceding communication several times；
Described MacMinBE adjusting modules be used for according to obtain it is preceding communicate several times when swipe the card equipment number of nodes
Number of times weighted value adjustment MacMinBE is kept out of the way in weighted value and preceding communication several times,
Work as N>NAveAnd NB>NBAveWhen meeting simultaneously, MacMinBE numerical value is added 1, MacMinBE=MacminBE+1,
Work as N<NAveAnd NB<NBAveWhen meeting simultaneously, MacMinBE numerical value is subtracted 1, MacMinBE=MacMinBE-1,
Otherwise MacMinBE keeps constant,
Wherein N is the quantity for equipment of currently swiping the card, NAveFor it is preceding communicate several times when swipe the card the weighting of equipment number of nodes
Value, NB is the retrogressing number of times for equipment of currently swiping the card, NBAveKeep out of the way number of times weighted value for preceding communication several times, MacMinBE is MAC
The minimum index avoidance of layer；
Described collision detection module is used to take the progress of control system to distributed agriculture row according to the MacMinBE values after adjustment
Collision detection.
Further, the calculation formula that described equipment number of nodes weight calculation module of swiping the card is used for：
Wherein NiFor the number of preceding i communication node, Num1 is empirical value, NAveSwiped the card equipment during for first Num1 times communication
The weighted value of number of nodes, αiFor nodes weight coefficient.
Further, described communication keep out of the way calculation formula that number of times weight calculation module uses for：
Wherein NBAveKeep out of the way number of times weighted value, β for current Num2 times communicationiKeep out of the way number of times weight coefficient, NB for communicationiFor
Number of times is kept out of the way in preceding i communication.
Further, the collision detection module carries out collision detection using CSMA/CA collision detection algorithms.
The beneficial effects of the invention are as follows:On the basis of CSMA/CA algorithms of the present invention, it is contemplated that the quantity and letter for equipment of swiping the card
Cease influence of the transmission times to MacMinBE, according to it is preceding communicate several times when swipe the card the weighted value of equipment number of nodes and preceding some
Secondary letter keeps out of the way number of times weighted value adjustment MacMinBE numerical value, equipment section of being swiped the card when equipment quantity of swiping the card is more than preceding communication several times
The weighted value of point quantity, and retreat number of times and be more than preceding when letter keeps out of the way number of times weighted value several times, MacMinBE plus 1；When swiping the card
Equipment quantity is less than the weighted value of preceding equipment number of nodes of swiping the card when communicating several times, and NB is less than preceding letter several times and keeps out of the way number of times
During weighted value, MacMinBE is subtracted 1.By said process, the present invention realizes MacMinBE adaptive adjustment, improves many
Communication success rate when equipment of swiping the card is simultaneously and agriculture row's expense control terminal communicates, it is ensured that the normal of user is used, and enhances user
Experience sense.
Brief description of the drawings
Fig. 1 is the topological diagram of distributed agriculture row expense control system；
Fig. 2 is MacMinBE adaptive algorithms flow chart of the present invention；
Fig. 3 is CSMA/CA algorithm improvement flow charts.
Embodiment
The embodiment to the present invention is described further below in conjunction with the accompanying drawings.
Distribution agriculture row expense control system anticonflict of the invention is swiped the card the embodiment of method
On the basis of CSMA/CA algorithms of the present invention, it is contemplated that the quantity and information transmission times pair for equipment of swiping the card
MacMinBE influence, the weighted value and preceding letter several times of equipment number of nodes of being swiped the card during according to preceding communication several times keep out of the way number of times
Weighted value adjusts MacMinBE numerical value, the weighting for equipment number of nodes of being swiped the card when equipment quantity of swiping the card is more than preceding communication several times
Value, and retreat number of times and be more than preceding when letter keeps out of the way number of times weighted value several times, MacMinBE plus 1；When swiping the card, equipment quantity is less than
The preceding weighted value of equipment number of nodes of swiping the card when communicating several times, and NB is less than preceding when letter keeps out of the way number of times weighted value several times, general
MacMinBE subtracts 1；Otherwise MacMinBE values are constant.The last MacMinBE values according to after adjustment carry out collision detection.
One agriculture row's expense control terminal can manage at least two motor-pumped wells, and each motor-pumped well one electric energy meter of correspondence and one swipe the card
Equipment.Illustrated below by taking a certain specific agriculture row expense control system as an example, the agriculture row in this example takes control system such as Fig. 1 institutes
Show, including an agriculture row takes control terminal, N number of channel converter, N number of three-phase electric energy meter, external on-load switch and N number of POS
Tool, agriculture row expense control terminal is connected by each channel converter with corresponding three-phase electric energy meter and equipment of swiping the card, each Channel-shifted
Device provides 12V direct current for corresponding equipment of swiping the card.Agriculture row's expense control terminal is used for collection and the expense keyholed back plate for realizing electricity consumption data
Reason, electric energy meter is used to measure electricity consumption data and continuous data is sent into expense control terminal, and equipment of swiping the card is used to obtain subscriber card letter
Cease and user's card information is sent to agriculture row's expense control terminal, the expense control module for taking control terminal is arranged to the progress of user's card information by agriculture
Reason, and result is sent to equipment of swiping the card, writing operation is completed in actual use by its interactive module by equipment of swiping the card
When, agriculture row takes control terminal in casing at platform area distribution transformer, and electric energy meter is arranged in motor-pumped well electricity distributing and metering case, is swiped the card
Equipment is arranged on outside batch meter in line bar, and equipment of swiping the card provides 12V power supplys and two-way RS_485 buses by channel converter, its
In all the way bus communicated with electric energy meter, another road communicates with equipment of swiping the card, away from agriculture row expense control terminal be embedded with CAN or electric power
The communication module of line carrier wave, turns RS485 modules by CAN, bandwidth carrier or micro power radio module and realizes and intelligence electricity
Real-time Communication for Power between table and equipment of swiping the card, completes metrical information automatic data collection and the management of power use of swiping the card.
Equipment is swiped the card when many while data transmission conflict can be caused when swiping the card, to improve the success rate of data transfer, originally
Invention is on the basis of CSMA/CA algorithms, it is contemplated that influence of the quantity and information transmission times for equipment of swiping the card to MacMinBE,
MacMinBE adaptive weighted algorithm is employed, the adaptive weighted algorithm flow charts of MacMinBE are as shown in Fig. 2 CSMA/CA
After algorithm increase MacMinBE adaptive algorithms, flow is as shown in figure 3, detailed process is as follows：
1. according to currently swiping the card, equipment quantity, the number of preceding i communication node determine nodes weight coefficient and preceding some
Swiped the card during secondary communication the weighted value of equipment number of nodes.
Wherein N is the quantity for equipment of currently swiping the card, and Ni is the number of preceding i communication node；Num1 is empirical value, this implementation
5, N are can use in exampleAveSwiped the card during for first Num1 times communication the weighted value of equipment number of nodes, αiFor nodes weight coefficient.
2. number of times weighted value is kept out of the way in communication several times before determining.
Wherein NBAveKeep out of the way number of times weighted value, β for current Num2 times communicationiKeep out of the way number of times weight coefficient for communication.
3. the weighted value of equipment number of nodes of being swiped the card during according to obtained preceding communication several times and preceding communication several times are kept out of the way
Number of times weighted value adjusts MacMinBE.
Work as N>NAveAnd NB>NBAveWhen meeting simultaneously, MacMinBE numerical value is added 1, MacMinBE=MacMinBE+1；
Work as N<NAveAnd NB<NBAveWhen meeting simultaneously, MacMinBE numerical value is subtracted 1, MacMinBE=MacMinBE-1；
Other when MacMinBE keep constant.
4. many are swiped the card with equipment while carry out collision detection of swiping the card, idiographic flow is as schemed according to the MacMinBE after adjustment
Shown in 3, detailed process is as follows：
When BLE domains first in received beacon frame are 0, by index avoidance BE, (Backoff exponent, i.e., move back every time
Keep away the stand-by period) the MacMinBE values of MAC layer are initialized as, otherwise, BE values should be set to small in both 2 and MacMinBE
Person；Then 2BE-1 time slot is avoided at random, and carries out channel idle CCA detections；When channel is space-time, length of window will be collided
CW (keeps out of the way latency value, CW initial value is 2, and maximum is 31) to subtract 1, and is zero in collision length of window CW every time
When, judgement equipment of swiping the card is successfully accessed, and otherwise re-starts CCA detections；When judging channel for busy, it is 2 to reset CW, and by after
Move back times N B and plus 1, index avoidance BE=min (BE+1, MacMinBE), and when retreating times N B more than the upper limit is kept out of the way, judge
Swipe the card equipment access failure, otherwise re-start avoidance.
By said process, Dang Duotai swipes the card equipment while when swiping the card, the present invention can improve equipment of swiping the card and arrange expense with agriculture
The communication success rate of control terminal.
A kind of distributed agriculture row of the present invention takes the embodiment of the anti-collision brushing card device of control system
Device in the present embodiment keeps out of the way number of times weighted value including equipment number of nodes weight calculation module of swiping the card, communication
Computing module, MacMinBE adjusting modules and collision detection module, equipment number of nodes weight calculation module of swiping the card are used for root
According to equipment number of nodes of being swiped the card when being communicated several times before current agriculture row brush card machine tool quantity, the determination of the number of preceding i communication node
Weighted value；Communication keeps out of the way number of times weight calculation module and is used to determine that number of times weighted value is kept out of the way in preceding communication several times；
MacMinBE adjusting modules be used for according to obtain it is preceding communicate several times when swipe the card the weighted value of equipment number of nodes and preceding some
Number of times weighted value adjustment MacMinBE is kept out of the way in secondary communication, works as N>NAveAnd NB>NBAveWhen meeting simultaneously, MacMinBE numerical value is added
1, MacMinBE=MacMinBE+1, work as N<NAveAnd NB<NBAveWhen meeting simultaneously, MacMinBE numerical value is subtracted 1, MacMinBE
=MacMinBE-1, otherwise MacMinBE keep constant, wherein N is currently the swipe the card quantity of equipment, NAveLead to several times to be preceding
Swiped the card during letter the weighted value of equipment number of nodes, NB is currently swipe the card the retrogressing number of times of equipment, NBAveMoved back for preceding communication several times
Number of times weighted value is kept away, MacMinBE is the minimum index avoidance of MAC layer；After collision detection module is used for according to adjustment
MacMinBE values take control system to distributed agriculture row and carry out collision detection.Each module implements means in the implementation of method
It is illustrated, repeats no more here in example.
Claims (8)
- A kind of method 1. anti-collision of distributed agriculture row expense control system is swiped the card, it is characterised in that this method comprises the following steps：1) according to equipment of being swiped the card when being communicated several times before current agriculture row brush card machine tool quantity, the determination of the number of preceding i communication node The weighted value of number of nodes；2) number of times weighted value is kept out of the way in communication several times before determining；3) number of times is kept out of the way in the weighted value of equipment number of nodes of being swiped the card when according to obtained preceding communication several times and preceding communication several times Weighted value adjusts MacMinBE,Work as N>NAveAnd NB>NBAveWhen meeting simultaneously, MacMinBE numerical value is added 1, MacMinBE=MacMinBE+1,Work as N<NAveAnd NB<NBAveWhen meeting simultaneously, MacminBE numerical value is subtracted 1, MacminBE=MacMinBE-1,Otherwise MacMinBE keeps constant,Wherein N is the quantity for equipment of currently swiping the card, NAveFor it is preceding communicate several times when swipe the card the weighted value of equipment number of nodes, N is The retrogressing number of times of current equipment of swiping the card, NBAveKeep out of the way number of times weighted value for preceding communication several times, MacMinBE is that MAC layer is minimum Index avoidance；4) control system is taken to distributed agriculture row according to the MacMinBE values after adjustment and carries out collision detection.
- The method 2. anti-collision of distributed agriculture row expense control system according to claim 1 is swiped the card, it is characterised in that described The preceding weighted value of equipment number of nodes of swiping the card when communicating several times is：Wherein NiFor the number of preceding i communication node, Num1 is empirical value, NAveSwiped the card equipment nodes during for first Num1 times communication The weighted value of amount, αiFor nodes weight coefficient.
- The method 3. anti-collision of distributed agriculture row expense control system according to claim 1 is swiped the card, it is characterised in that described Number of times weighted value NB is kept out of the way in preceding communication several timesAveFor：Wherein NBAveKeep out of the way number of times weighted value, β for current Num2 times communicationiKeep out of the way number of times weight coefficient, NB for communicationiTo be first i times Number of times is kept out of the way in communication.
- The method 4. anti-collision of distributed agriculture row expense control system according to claim 1 is swiped the card, it is characterised in that the step It is rapid 4) to use CSMA/CA collision detection algorithms.
- 5. a kind of distributed agriculture row takes the anti-collision brushing card device of control system, it is characterised in that the device includes equipment section of swiping the card Number of times weight calculation module, MacMinBE adjusting modules and collision detection mould are kept out of the way in point quantity weight calculation module, communication Block,Described equipment number of nodes weight calculation module of swiping the card is used to have quantity according to current agriculture row brush card machine, led to for first i times Believe the weighted value for equipment number of nodes of being swiped the card when the number of node communicates several times before determining；Described communication keeps out of the way number of times weight calculation module and is used to determine that number of times weighted value is kept out of the way in preceding communication several times；Described MacMinBE adjusting modules be used for according to obtain it is preceding communicate several times when swipe the card the weighting of equipment number of nodes Number of times weighted value adjustment MacMinBE is kept out of the way in value and preceding communication several times,Work as N>NAveAnd NB>NBAveWhen meeting simultaneously, MacMinBE numerical value is added 1, MacMinBE=MacMinBE+1,Work as N<NAveAnd NB<NBAveWhen meeting simultaneously, MacMinBE numerical value is subtracted 1, MacMinBE=MacMinBE-1,Otherwise MacMinBE keeps constant,Wherein N is the quantity for equipment of currently swiping the card, NAveFor it is preceding communicate several times when swipe the card the weighted value of equipment number of nodes, NB For the retrogressing number of times for equipment of currently swiping the card, NBAveKeep out of the way number of times weighted value for preceding communication several times, MacMinBE is that MAC layer is minimum Index avoidance；Described collision detection module is used to conflict to distributed agriculture row's expense control system according to the MacminBE values after adjustment Detection.
- 6. distributed agriculture row according to claim 5 takes the anti-collision brushing card device of control system, it is characterised in that described The calculation formula that equipment number of nodes weight calculation module of swiping the card is used for：Wherein NiFor the number of preceding i communication node, Num1 is empirical value, NAveSwiped the card equipment nodes during for first Num1 times communication The weighted value of amount, αiFor nodes weight coefficient.
- 7. distributed agriculture row according to claim 5 takes the anti-collision brushing card device of control system, it is characterised in that described Communication keep out of the way calculation formula that number of times weight calculation module uses for：Wherein NBAveKeep out of the way number of times weighted value, β for current Num2 times communicationiKeep out of the way number of times weight coefficient, NB for communicationiTo be first i times Number of times is kept out of the way in communication.
- 8. distributed agriculture row according to claim 5 takes the anti-collision brushing card device of control system, it is characterised in that the punching Prominent detection module carries out collision detection using CSMA/CA collision detection algorithms.
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