CN101256711A - Electric power carrier wave remote meter reading method - Google Patents
Electric power carrier wave remote meter reading method Download PDFInfo
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- CN101256711A CN101256711A CNA2008100176963A CN200810017696A CN101256711A CN 101256711 A CN101256711 A CN 101256711A CN A2008100176963 A CNA2008100176963 A CN A2008100176963A CN 200810017696 A CN200810017696 A CN 200810017696A CN 101256711 A CN101256711 A CN 101256711A
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Abstract
The invention discloses a power carrier remote meter reading method, firstly, coding read power consumption; modulating coded information, that is, spreading spectrum, amplifying current, modulating the information by three-state 200 micron s pulse position, that is, 200 micron s advance, 200 micron s lag and no modulation which are combined to represent different information; sending the modulated information coupled to a power line; then reading the power consumption in another end of the power line by information through a coupling unit, the three-state 200 micron s pulse position modulation, that is, pre-process and de-large. The method of the invention improves bit rate and transmission distance of the power carrier remote meter reading and greatly overcomes effect to the meter reading system by power load.
Description
Technical field
The invention belongs to communication technical field, be specifically related to a kind of electric power carrier wave remote meter reading method that carries out modulating/demodulating by the tri-state impulse position.
Background technology
The power supply department of China is also continued to use traditional manual meter reading method in a large number at present, and there are many drawbacks in this meter reading method: (1) manual metering inefficiency, and the ammeter quantity that can read to copy in everyone every month is quite limited; (2) the artificial error of reading, copy happens occasionally, and exists phenomenons such as electricity use based on human relationships, connection-related electricity use, causes big contradiction and electricity consumption dispute; (3) because table meter infield disperses, can't accomplish to read simultaneously to copy ammeter, the gained data are unfavorable for the statistics and analysis of science that the electricity consumption situation is carried out.Along with Every household has an ammeter, the continuous popularization of centralized automatic meter-reading, bank networking, power supply department need only read to copy the user of several summary tables originally, through Every household has an ammeter transform after, read to copy independently ammeter of hundreds of even thousands of possibly, workload increases greatly.By existing staffing and business revenue mode, power supply department is difficult to bear.
The enforcement of electric power remote Automatic meter reading system can overcome all drawbacks above-mentioned and shortcoming.Implementing in full of it not only satisfied the masses to the requirement that Every household has an ammeter, reduce the error of reading the process of copying, and can greatly improve the efficient of the work of checking meter, save a large amount of man power and materials, also can carry out statistical study to the various data of copying back in real time in a large number, customer charge curve in the fixed time section is provided, the balancing the load rate, significant datas such as power supply index monitoring, for the decision-making and the supvr reliable basis is provided, thereby improve the operation level and the power supply reliability of electric power system, can implement the continuous copy reading monitoring of 24h to the emphasis user who sets automatically, at any time grasp this user's electricity consumption situation, can prevent stealing and the generation of promise breaking with electrical phenomena, and can be according to user's needs, realize long-range drawing, the control of closing a floodgate is carried out the problem that has a power failure after solving subscriber arrearage timely and effectively, helps the monitoring and the adjustment of distribution system power load simultaneously, this is a more satisfactory systems engineering, is subjected to the power supply department extensive concern.
The existing power remote automatic meter reading system all adopts twin-stage to report mechanism.The first order be ammeter to concentrator, transmission mode is RS485 and 220V power carrier.The second level is that concentrator is to the electrical management center.Transmission mode is wired local network, broadband metropolitan area network, GPRS, wireless communication networks and 10kV power line carrier net.Wherein except that power line carrier, all the other transmission modes all need be rented the external information transmission network, and operation cost is higher.Having only the 10kV power line carrier is the electric system internal resource, and Internet resources are abundant, and operation cost is cheap, has stand-alone development potentiality preferably.But the problem that exists is that the power line carrier antijamming capability is relatively poor, and transmission range is limited, is difficult to realize on a large scale, long-range covering.How to address this problem becomes this system development, universal bottleneck.
Summary of the invention
The purpose of this invention is to provide a kind of electric power carrier wave remote meter reading method, solved existing electric power carrier wave remote meter reading system communication apart from the problem of lacking and being subject to the electric load influence.
The technical solution adopted in the present invention is, electric power carrier wave remote meter reading method, and at first the ammeter from user side reads the power consumption data, these data is delivered to concentrator by the asynchronous serial communication agreement encode; With the information behind the coding, carry out spread spectrum, ternary 200 μ s pulse-position modulation and electric current and amplify, send to long-range ammeter through the line of electric force coupling unit; Long-range ammeter is coupled the information that receives get off by line of electric force, through pre-service, ternary 200 μ s pulse position demodulation, search according to demodulating information contrast code book, demodulated information is converted to 700 system data, then 700 system data-switching are become decimal data, read power consumption, specifically comprise the steps:
A. read the power consumption data from the ammeter that is connected to user side, with these data by the asynchronous serial communication agreement, deliver to concentrator after, encode;
B. the information after will encoding, carry out spread spectrum, electric current amplification and ternary 200 μ s pulse-position modulation, with leading 200 μ s, lag behind 200 μ s with do not modulate three kinds of modes and make up and represent different information, according to the different information and the corresponding one by one code book of making of 700 systems of representative;
C. the information after the modulation sends to long-range ammeter through the line of electric force coupling unit;
D. long-range ammeter is coupled the information that receives get off by line of electric force, through ternary 200 μ s pulse position demodulation, pre-service, despreading, decoding, searches and the corresponding one by one corresponding binary-coded character group of code book of making of 700 systems, reads power consumption.
Characteristics of the present invention also are,
Three-state 200 μ s pulse-position modulation methods wherein are, a frame is formed in 8 pulses, and frame head is represented in preceding 2 pulses, do not do modulation, the three-state modulation is carried out in six pulses in back, occurs 729 kinds of different patterns altogether, and on behalf of different pieces of information information, described 729 kinds of different patterns carry out the conversion of 700 systems.
Three-state 200 μ s pulse position demodulation methods wherein are, the information of input detuner is by 3 comparers, the reference waveform of 200 μ s respectively and in advance, and the reference waveform and the reference waveform that fall behind 200 μ s compare, and obtain 3 matching factors; If shift to an earlier date the matching factor maximum that 200 μ s reference waveforms are calculated, just rule out+1, if fall behind the matching factor maximum that 200 μ s reference waveforms are calculated, just rule out-1, if the matching factor maximum that reference waveform is calculated just is judged to 0.
Electric power carrier wave remote meter reading method of the present invention adopts that ternary 200 μ s pulse positions are modulated, demodulation, has improved the bit rate and the transmission range of electric power carrier wave remote meter reading, and can be good at overcoming the influence of electric load to kilowatt meter reading-out system.
Description of drawings
Fig. 1 is a remote power carrier meter reading method principle schematic;
Fig. 2 is that the form of 645 agreements is represented synoptic diagram;
Fig. 3 is a tri-state impulse displacement phase modulation principle synoptic diagram of the present invention;
Fig. 4 is a tri-state impulse position modulation frame format principle schematic of the present invention;
Fig. 5 is a codeword decision principle schematic of the present invention.
Embodiment
Below in conjunction with the drawings and specific embodiments the present invention is described in detail.
With reference to Fig. 1, remote power carrier meter reading method of the present invention, at first the ammeter from user side reads the power consumption data, these data is delivered to concentrator by the asynchronous serial communication agreement encode; With the information behind the coding, carry out spread spectrum, ternary 200 μ s pulse-position modulation and electric current and amplify; Send to long-range ammeter through the line of electric force coupling unit; Long-range ammeter is coupled the information that receives get off by line of electric force, through pre-service, ternary 200 μ s pulse position demodulation, despreading, decoding, searches and 700 system code books character to decimal group one to one, reads power consumption.
Below with embodiment concrete steps are described:
Adopt two layer system up and down: the upper strata is the collection of data between management of power use center and the concentrator, adopts hub-and-spoke configuration; Bottom is the collection of data between concentrator and the electric energy meter, adopts tree.5 concentrators are set, and each concentrator is hung 1000 ammeters down, and ammeter per hour writes down power consumption one time.
1) the power consumption data that every ammeter is read are delivered to concentrator by the asynchronous serial communication agreement, the asynchronous serial communication agreement promptly 645 agreements form as shown in Figure 2.
For example: copying power consumption is 2748 degree, and through after the 645 agreement binding and layout being: 68 BB BB BB BB BB BB, 68 81 06 10 90 00 00 0A BC 1F 16, wherein four bytes of 00 00 0A BC are power consumption.
2) data after the binding and layout are encoded
Coding can adopt conventional coding method, for example Goppa sign indicating number, Turbo code, convolutional code and RS sign indicating number etc., and present embodiment adopts RS to encode and illustrates.
The RS sign indicating number belongs to a kind of of BCH code, and BCH code is a kind of of reflected code, and it has the ability of correcting a plurality of random errors.This example utilization RS (78,38) sign indicating number is encoded, the promptly the longest data of compiling 38 bytes, and the front of 38 bytes of less than mends 0.
Coding method was divided into for two steps: 1) seek survival into polynomial expression g (x); 2) ask code polynomial c (x).
With information code polynomial expression m
K-1x
K-1+ m
K-2x
K-2+ ...+m
0Rise x
N-kGenerator polynomial g (x) is removed in position back, and gained residue r (x) is the supervision polynomial expression, will supervise polynomial expression and place and rise x
N-kAfter the message polynomial of position, just formed the RS sign indicating number.The generator polynomial of entangling v symbol error is
A is a finite field gf (2
m) element.If the input information sign indicating number is m (x), the code character behind the coding is c (x), then
c(x)＝x
n-km(x)+x
n-km(x)modg(x)
For example: frame data 68 BB BB BB BB BB BB 68 81 06 10 90 00 00 0A BC 1F16 convert the decimal system earlier to and are: 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,104,187,187,187,187,187,187,104,129,6,16,144,0,0,10,188,31,22, owing to 38 of less thaies, the front all mends 0.Through the data behind the coding is 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,104,187,187,187,187,187,187,104,129,6,16,144,0,0,10,188,31,22,178,71,143,59,180,242,92,223,181,75,199,63,73,96,226,80,75,217,245,169,95,29,191,133,110,74,32,84,85,76,105,213,2,221,112,45,60,120,77,213.
3) coding carries out spread spectrum after finishing, electric current amplifies, and then metric coded data is become the data of 700 systems with 700 system code book corresponding conversion, then according to the data represented different information of 700 systems one by one correspondence modulate.
The present invention adopts ternary 200 μ s pulse-position modulation modes, and what Fig. 3 showed is tri-state impulse displacement phase modulation principle synoptic diagram.With leading 200 μ s, lag behind 200 μ s with do not modulate three kinds of modes and make up and represent different information, for example come regulation tri-state impulse position with following table:
Tri-state impulse position modulation table
| Modulation code | Pulse condition | Indication |
| “00” | |
0 |
| “01” | Hysteresis pulse+200 | + |
| “10” | Prepulsing-200 | - |
Shown in Figure 4 is the frame format synoptic diagram of tri-state impulse position modulation.A frame is formed in one group of 8 pulse, and frame head is represented in preceding 2 pulses, does not do modulation.The three-state modulation is carried out in six pulses in the pulsegroup, 729 kinds of different patterns can appear altogether, the different pieces of information information of these 729 different pattern representatives is carried out the conversion of 700 systems, different information and the corresponding one by one code book of making of 700 systems according to representative, when decoding, search 700 system code books and reduce, improved the reliability of transmission.
For example:
A[i]=N[k] %3-1; N[k]=N[k]/3; N[k wherein] be the number of 700 systems, a[i] for " 0+-" of modulation as N[k]=50, a[0 then]=1, a[1]=0, a[2]=1, a[3]=0, a[4]=-1, a[2]=-1. i.e. "+0+0--"
For example:the data of having encoded are 0,0,0; 0,0,0; 0,0,0; 0,0,0; 0,0,0; 0,0,0; 0,0,104; 187,187,187; 187,187,187; 104,129,6; 16,144,0; 0,10,188; 31,22,178; 71,143,59; 180,242,92; 223,181,75; 199,63,73; 96,226,80; 75,217,245; 169,95,29; 191,133,110; 74,32,84; 85,76,105; 213,2,221; 112,45,60; 120; 77,213700：′------"------"------"------"------"------"------"------"------"------"------"------"------′′------"------"------"------"------"------"------"＋0＋-0-"0＋＋-＋-"0＋＋-＋-"0＋＋-＋-"0＋＋-＋-′′0＋＋-＋-"0＋＋-＋-"＋0＋-0-"-0＋00-"-＋----"0＋0---"--0＋0-"------"------"0-0---"＋＋＋-＋-′"00-0--"00＋---"0＋0-＋-"＋＋0＋--"＋＋-＋0-"＋0-＋--"--＋-＋-"＋＋＋＋＋-"＋-0-0-"0＋-＋＋-′′0-＋-＋-"-0＋＋--"0-00＋-"--0＋--"0-＋＋--"-＋0-0-"0-0＋＋-"＋＋＋＋--"-0＋＋--"0--＋＋-′′＋----0"0＋--＋-"＋00-0-"＋--0--"＋--0＋-"0＋＋00-"＋--00-"＋-＋＋--"＋0-0--"-0--0-"00--0-′′00＋＋--"-＋＋-0-"-＋＋0＋-"＋-----"＋0-＋＋-"00-00-"--＋0--"-＋-＋--"-0000-"＋0＋＋--′′-＋＋0＋-′。
4) information after modulation is finished transfers to long-range ammeter by coupling unit;
5) long-range ammeter is coupled the information that receives and gets off to send into concentrator by line of electric force, in the data processor of concentrator the data that receive is carried out ternary 200 μ s pulse position demodulation;
Shown in Figure 4 is that code word of the present invention is judged principle schematic.The information of input is by 3 comparers, respectively with the reference waveform that shifts to an earlier date 200 μ s, the reference waveform and the reference waveform that fall behind 200 μ s compare, and obtain 3 matching factors, if shift to an earlier date the matching factor maximum that 200 μ s reference waveforms are calculated, just rule out+1, if fall behind the matching factor maximum that 200 μ s reference waveforms are calculated, just rule out-1, if the matching factor maximum that reference waveform is calculated, just be judged to 0, so just finished the demodulation of the pulse displacement modulation of ternary modulation.
Code element after demodulation is intact is the code word of the three-state modulation of similar " ++ 00--", can find corresponding character to decimal group according to searching alphabet, has so just finished the conversion of code word.N[k]=(a[5]+1) * 243+ (a[4]+1) * 81+ (a[3]+1) * 27+ (a[2]+1) * 9+ (a[1]+1) * 3+ (a[0]+1); A[i wherein] modulation intelligence for receiving; N[k] be the data corresponding with 700 systems.：′------"------"------"------"------"------"------"------"------′′------"------"------"------"------"------"------"------"------"------"------"＋0＋-0-"0＋＋-＋-′′0＋＋-＋-"0＋＋-＋-"0＋＋-＋-"0＋＋-＋-"0＋＋-＋-"＋0＋-0-"-0＋00-"-＋----"0＋0---"--0＋0-′′------"------"0-0---"＋＋＋-＋-"00-0--"00＋---"0＋0-＋-"＋＋0＋--"＋＋-＋0-"＋0-＋--"--＋-＋-′′＋＋＋＋＋-"＋-0-0-"0＋-＋＋-"0-＋-＋-"-0＋＋--"0-00＋-"--0＋--"0-＋＋--"-＋0-0-"0-0＋＋-′′＋＋＋＋--"-0＋＋--"0--＋＋-"＋----0"0＋--＋-"＋00-0-"＋--0--"＋--0＋-"0＋＋00-"＋--00-′′＋-＋＋--"＋0-0--"-0--0-"00--0-"00＋＋--"-＋＋-0-"-＋＋0＋-"＋-----"＋0-＋＋-"00-00-"--＋0--′′-＋-＋--"-0000-"＋0＋＋--"-＋＋0＋-′； Obtain 0 through the search key book with 700 systems are corresponding one by one; 0,0; 0,0,0; 0,0,0; 0,0,0; 0,0,0; 0,0,0; 0,0,104; 187,187,187; 187,187,187; 104,129,6; 16,144,0; 0,10,188; 31,22,178; 71,143,59; 180,242,92; 223,181,75; 199,63,73; 96,226,80; 75,217,245; 169,95,29; 191,133,110; 74,32,84; 85,76,105; 213,2,221; 112,45,60; 120,77,213.
6) data after the demodulation are carried out despreading, decipher through RS again;
RS decoding:
If the code vector that sends: C (x)=q (x) g (x)
Receive code vector: R (x)=C (x)+E (x)
Then the error pattern that is caused by channel is:
e(x)＝R(x)-C(x)＝e
0+e
1x+…e
n-1x
n-1
For determining e (x), need know errors present x
iAnd improper value e
i2v syndrome element is by α
iSubstitution receiverd polynomial R (x) obtains, if S
k=0, think that reception is errorless; If S
k≠ 0, pattern S then locates errors
k
Solve an equation by the chien search method, obtain errors present, utilize the foney algorithm to obtain wrong amplitude then, obtain e (x).At the errors present of correspondence, add the corresponding error value, promptly finish error correction.
For example: the data that receive are 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,104,187,187,187,187,187,187,104,129,6,16,144,0,0,10,188,31,22,178,71,143,59,180,242,92,223,181,75,199,63,73,96,226,80,75,217,245,169,95,29,191,133,110,74,32,84,85,76,105,213,2, it is 0,0,0,0,0 that 221,112,45,60,120,77,213 process RS decodings obtain data, 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,104,187,187,187,187,187,187,104,129,6,16,144,0,0,10,188,31,22.
7) data based 645 agreements after RS has deciphered extract power consumption.
For example: the data that decoding obtains are 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,104,187,187,187,187,187,187,104,129,6,16,144,0,0,10,188,31,22 to be converted to sexadecimal be 68 BB BBBB BB BB BB, 68 81 06 10 90 00 00 0A BC 1F 16, and extracting power consumption information according to 645 agreements is i.e. 2748 degree of 00 00 0A BC.
Claims (3)
1. electric power carrier wave remote meter reading method, at first the ammeter from user side reads the power consumption data, these data is delivered to concentrator by the asynchronous serial communication agreement encode; With the information behind the coding, carrying out spread spectrum, ternary 200 μ s pulse-position modulation and electric current amplifies, send to long-range ammeter through the line of electric force coupling unit: long-range ammeter is coupled the information that receives get off by line of electric force, through pre-service, ternary 200 μ s pulse position demodulation, search according to demodulating information contrast code book, demodulated information is converted to 700 system data, then 700 system data-switching are become decimal data, read power consumption, it is characterized in that, specifically comprise the steps:
A. read the power consumption data from the ammeter that is connected to user side, with these data by the asynchronous serial communication agreement, deliver to concentrator after, encode;
B. the information after will encoding, carry out spread spectrum, electric current amplification and ternary 200 μ s pulse-position modulation, with leading 200 μ s, lag behind 200 μ s with do not modulate three kinds of modes and make up and represent different information, according to the different information and the corresponding one by one code book of making of 700 systems of representative;
C. the information after the modulation sends to long-range ammeter through the line of electric force coupling unit;
D. long-range ammeter is coupled the information that receives get off by line of electric force, through ternary 200 μ s pulse position demodulation, pre-service, despreading, decoding, searches and the corresponding one by one corresponding binary-coded character group of code book of making of 700 systems, reads power consumption.
2. electric power carrier wave remote meter reading method according to claim 1, it is characterized in that, described ternary 200 μ s pulse-position modulation methods are, a frame is formed in 8 pulses, frame head is represented in preceding 2 pulses, does not do modulation, and the three-state modulation is carried out in back six pulses, occur 729 kinds of different patterns altogether, on behalf of different pieces of information information, described 729 kinds of different patterns carry out the conversion of 700 systems.
3. electric power carrier wave remote meter reading method according to claim 1, it is characterized in that, described ternary 200 μ s pulse position demodulation methods are, the information of input detuner is by 3 comparers, respectively with the reference waveform that shifts to an earlier date 200 μ s, the reference waveform and the reference waveform that fall behind 200 μ s compare, and obtain 3 matching factors; If shift to an earlier date the matching factor maximum that 200 μ s reference waveforms are calculated, just rule out+1, if fall behind the matching factor maximum that 200 μ s reference waveforms are calculated, just rule out-1, if the matching factor maximum that reference waveform is calculated just is judged to 0.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101621313B (en) * | 2009-07-29 | 2012-07-04 | 昆明天龙经纬电子科技有限公司 | High-voltage power line carrier signal communication coupling method and device |
| CN103152358A (en) * | 2013-03-22 | 2013-06-12 | 中国科学院上海微系统与信息技术研究所 | Electricity meter data collecting system and method |
| CN105573276A (en) * | 2015-12-25 | 2016-05-11 | 华北电力科学研究院有限责任公司 | Fieldbus information transmission method |
| CN106908750A (en) * | 2017-01-10 | 2017-06-30 | 河南许继仪表有限公司 | A kind of electric energy meter pulse error detection method and device |
-
2008
- 2008-03-13 CN CN200810017696A patent/CN100589141C/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101621313B (en) * | 2009-07-29 | 2012-07-04 | 昆明天龙经纬电子科技有限公司 | High-voltage power line carrier signal communication coupling method and device |
| CN103152358A (en) * | 2013-03-22 | 2013-06-12 | 中国科学院上海微系统与信息技术研究所 | Electricity meter data collecting system and method |
| CN105573276A (en) * | 2015-12-25 | 2016-05-11 | 华北电力科学研究院有限责任公司 | Fieldbus information transmission method |
| CN106908750A (en) * | 2017-01-10 | 2017-06-30 | 河南许继仪表有限公司 | A kind of electric energy meter pulse error detection method and device |
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|---|---|
| CN100589141C (en) | 2010-02-10 |
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Free format text: CORRECT: ADDRESS; FROM: 710048 NO. 5, JINHUA SOUTH ROAD, XI AN CITY, SHAANXI PROVINCE TO: 518057 5-6/F, SED TECHNOLOGY INDUSTRIAL BUILDING, SCIENCE AND TECHNOLOGY PARK, NANSHAN DISTRICT, SHENZHEN CITY, GUANGDONG PROVINCE |
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Effective date of registration: 20110426 Address after: 518057 Nanshan District science and Technology Park, Guangdong SED science and technology Arts crafts emporium,, building 5, 6 Patentee after: Shenzhen Sed-Ipd International Electronic Device Co., Ltd. Address before: 710048 Shaanxi city of Xi'an Province Jinhua Road No. 5 Patentee before: Xi'an University of Technology |
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Assignee: Shenzhen Sed-Ipd International Electronic Device Co., Ltd. Assignor: Xi'an University of Technology Contract record no.: 2011440020120 Denomination of invention: Electric power carrier wave remote meter reading method Granted publication date: 20100210 License type: Exclusive License Open date: 20080903 Record date: 20110420 |
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Address after: 518000 Nanshan District science and Technology Park, Guangdong, SED, Arts crafts emporium, 5, 6, Shenzhen Patentee after: Shenzhen SED International Power Technology Co., Ltd. Address before: 518057 Nanshan District science and Technology Park, Guangdong SED science and technology Arts crafts emporium,, building 5, 6 Patentee before: Shenzhen Sed-Ipd International Electronic Device Co., Ltd. |
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