CN102637352A - Remote meter reading method and system, primary electric energy meter and secondary electric energy meter - Google Patents
Remote meter reading method and system, primary electric energy meter and secondary electric energy meter Download PDFInfo
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- CN102637352A CN102637352A CN2012100430871A CN201210043087A CN102637352A CN 102637352 A CN102637352 A CN 102637352A CN 2012100430871 A CN2012100430871 A CN 2012100430871A CN 201210043087 A CN201210043087 A CN 201210043087A CN 102637352 A CN102637352 A CN 102637352A
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Abstract
The invention discloses a remote meter reading method and system, a primary electric energy meter and a secondary electric energy meter. In the remote meter reading method, an acquisition terminal sends a meter reading command to each primary electric energy meter through a power line; each primary electric energy meter judges whether the electric energy meter address included in the meter reading command is the same as the primary meter address thereof; if the two addresses are different, the primary electric energy meter sends the meter reading command to each secondary electric energy meter connected therewith through an RS485 bus, and each secondary electric energy meter judges whether the electric energy meter address included in the meter reading command is the same as the secondary electric meter address thereof; and if so, the secondary electric energy meter sends the meter data obtained by the statistics thereof to the acquisition terminal through the primary electric energy meter via the RS485 bus. Since the acquisition terminal sends the meter reading command to each primary electric energy meter through the power line and each primary electric energy meter sends the meter reading command to multiple secondary electric energy meters connected therewith through the RS485 bus, the wiring complexity is simplified, the meter reading cost is reduced, and the meter reading speed is increased.
Description
Technical field
The present invention relates to the communications field, particularly relate to a kind of remote meter reading method and system, electric energy master meter and electric energy subtabulation.
Background technology
Along with the application of digitizing technique in electric energy meter, (General Packet Radio Service, be called for short: GPRS) power remote meter reading system has obtained using widely in GPRS.The GPRS power remote meter reading system utilizes existing GPRS network or other mobile communications network to transmit ammeter data, thereby realizes remote meter reading.Yet the defective of this scheme is that the GPRS power remote meter reading system depends on the mobile network of mobile operator, therefore need pay the traffic fee usefulness of great number to mobile operator, thereby operation cost is higher.In the backcountry, because the capital construction of mobile operator is relatively poor, the success ratio that therefore causes checking meter is low simultaneously.
In order to overcome this defective, (Power Line Communication, be called for short: the remote meter reading technology through line of electric force transmission ammeter data has appearred in the PLC) development of technology at present along with power line communication.Because the bandwidth of low-voltage power line communication at present is limited in the scope of 3KHz to 500KHz, traffic rate is less than 1Mbit/s, and the speed of therefore checking meter is slower.
Summary of the invention
The technical matters that the present invention will solve provides a kind of remote meter reading method and system, electric energy master meter and electric energy subtabulation, thereby can utilize the networking of existing power line facility, improves the speed of checking meter, reduces the cost of checking meter.
According to an aspect of the present invention, a kind of remote meter reading method is provided, comprises:
Acquisition terminal sends the order of checking meter through line of electric force to each electric energy master meter, comprises the electric energy meter address in the order of checking meter;
Each electric energy master meter judges whether the electric energy meter address that comprises in the order of checking meter is identical with the master meter address of self after receiving the order of checking meter;
The master meter address of the electric energy meter address and electric energy master meter self that comprises in the order if check meter is identical, and then the electric energy master meter sends to acquisition terminal with the ammeter data of self adding up through line of electric force;
The master meter address of the electric energy meter address and electric energy master meter self that comprises in the order if check meter is different, and then the electric energy master meter sends to connected each electric energy subtabulation through the order of will checking meter of RS485 bus;
Each electric energy subtabulation judges whether the electric energy meter address that comprises in the order of checking meter is identical with the subtabulation address of electric energy subtabulation self after receiving the order of checking meter;
The subtabulation address of the electric energy meter address and electric energy subtabulation self that comprises in the order if check meter is identical, and then the electric energy subtabulation sends to connected electric energy master meter with the ammeter data of self adding up through the RS485 bus;
The electric energy master meter sends to acquisition terminal with the ammeter data that the electric energy subtabulation sends through line of electric force.
According to an aspect of the present invention, a kind of electric energy master meter is provided, comprises:
First communication unit is used to receive acquisition terminal through the order of checking meter that line of electric force sends, and comprises the electric energy meter address in the order of checking meter; After receiving the ammeter data that sends in reading unit or second communication unit, ammeter data is sent to acquisition terminal through line of electric force;
Recognition unit is used for judging whether the electric energy meter address that order comprises of checking meter is identical with the master meter address of electric energy master meter self;
Reading unit; Be used for judged result according to recognition unit; The master meter address of the electric energy meter address and electric energy master meter self that comprises in the order if check meter is identical, then reads the ammeter data of electric energy master meter self statistics from storage unit, and ammeter data is sent to first communication unit;
The second communication unit is used for the judged result according to recognition unit, if the master meter address of the electric energy meter address and electric energy master meter self that comprise in the order of checking meter is different, then sends to each the electric energy subtabulation that is connected with the electric energy master meter through the order of will checking meter of RS485 bus; And when receiving the ammeter data that the electric energy subtabulation sends through the RS485 bus, the ammeter data that the electric energy subtabulation is sent sends to first communication unit;
Storage unit is used for the ammeter data that storage of electrical energy master meter self is added up.
According to an aspect of the present invention, a kind of electric energy subtabulation is provided, comprises:
Communication unit is used to receive the order of checking meter that the electric energy master meter sends through the RS485 bus, comprises the electric energy meter address in the order of wherein checking meter; And when receiving the ammeter data of reading unit transmission, ammeter data is sent to the electric energy master meter through the RS485 bus;
Judging unit is used for judging whether the electric energy meter address that order comprises of checking meter is identical with the subtabulation address of electric energy subtabulation self;
Reading unit; Be used for judged result according to judging unit; The subtabulation address of the electric energy meter address and electric energy subtabulation self that comprises in the order if check meter is identical, then reads the ammeter data of electric energy subtabulation self statistics from storage unit, and ammeter data is sent to communication unit;
Storage unit is used for the ammeter data that storage of electrical energy subtabulation self is added up.
According to an aspect of the present invention, a kind of long-distance meter-reading system is provided, comprises:
Acquisition terminal is used for sending the order of checking meter through line of electric force to each electric energy master meter, comprises the electric energy meter address in the order of checking meter; The ammeter data that the electric energy master meter is sent reports main website;
The electric energy master meter is used for after receiving the order of checking meter, and judges whether the electric energy meter address that comprises in the order of checking meter is identical with the master meter address of electric energy master meter self; The master meter address of the electric energy meter address and electric energy master meter self that comprises in the order if check meter is identical, and then the ammeter data with electric energy master meter self statistics sends to acquisition terminal through line of electric force; The master meter address of the electric energy meter address and electric energy master meter self that comprises in the order if check meter is different, then sends to connected each electric energy subtabulation through the order of will checking meter of RS485 bus; The ammeter data that the electric energy subtabulation is sent through the RS485 bus sends to acquisition terminal through line of electric force;
The electric energy subtabulation is used for after receiving the order of checking meter, and judges whether the electric energy meter address that comprises in the order of checking meter is identical with the subtabulation address of electric energy subtabulation self; The subtabulation address of the electric energy meter address and electric energy subtabulation self that comprises in the order if check meter is identical, then through the RS485 bus ammeter data of self adding up is sent to connected electric energy master meter.
The present invention sends check meter order through line of electric force to each electric energy master meter through acquisition terminal, comprises the electric energy meter address in the order of checking meter; Each electric energy master meter judges whether the electric energy meter address that comprises in the order of checking meter is identical with the master meter address of self after receiving the order of checking meter; The master meter address of the electric energy meter address and electric energy master meter self that comprises in the order if check meter is identical, and then the electric energy master meter sends to acquisition terminal with the ammeter data of self adding up through line of electric force; The master meter address of the electric energy meter address and electric energy master meter self that comprises in the order if check meter is different, and then the electric energy master meter sends to connected each electric energy subtabulation through the order of will checking meter of RS485 bus; Each electric energy subtabulation judges whether the electric energy meter address that comprises in the order of checking meter is identical with the subtabulation address of electric energy subtabulation self after receiving the order of checking meter; The subtabulation address of the electric energy meter address and electric energy subtabulation self that comprises in the order if check meter is identical, and then the electric energy subtabulation sends to connected electric energy master meter through the RS485 bus with the ammeter data of self adding up; The electric energy master meter sends to acquisition terminal with the ammeter data that the electric energy subtabulation sends through line of electric force.Because acquisition terminal can send to each electric energy master meter with the order of checking meter through line of electric force concomitantly; Each electric energy master meter can send to connected a plurality of electric energy subtabulation through the order of will checking meter of RS485 bus; The electric energy subtabulation directly is not connected with acquisition terminal; Therefore existing power line facility capable of using networking, simultaneously the complexity of simplified wiring, reduce the cost of checking meter, improve the speed of checking meter.
Description of drawings
Fig. 1 is the synoptic diagram of an embodiment of remote meter reading method of the present invention.
Fig. 2 is the synoptic diagram of another embodiment of remote meter reading method of the present invention.
Fig. 3 is the synoptic diagram of an embodiment of electric energy master meter of the present invention.
Fig. 4 is the synoptic diagram of another embodiment of electric energy master meter of the present invention.
Fig. 5 is the synoptic diagram of an embodiment of electric energy subtabulation of the present invention.
Fig. 6 is the synoptic diagram of another embodiment of electric energy subtabulation of the present invention.
Fig. 7 is the synoptic diagram of an embodiment of long-distance meter-reading system of the present invention.
Embodiment
With reference to the accompanying drawings the present invention is more comprehensively described, exemplary embodiment of the present invention wherein is described.
Fig. 1 is the synoptic diagram of a kind of embodiment of remote meter reading method of the present invention.As shown in Figure 1, the remote meter reading method of this embodiment is following:
Remote meter reading method based on the above embodiment of the present invention provides sends check meter order through line of electric force to each electric energy master meter through acquisition terminal, comprises the electric energy meter address in the order of checking meter; Each electric energy master meter judges whether the electric energy meter address that comprises in the order of checking meter is identical with the master meter address of self after receiving the order of checking meter; The master meter address of the electric energy meter address and electric energy master meter self that comprises in the order if check meter is identical, and then the electric energy master meter sends to acquisition terminal with the ammeter data of self adding up through line of electric force; The master meter address of the electric energy meter address and electric energy master meter self that comprises in the order if check meter is different, and then the electric energy master meter sends to connected each electric energy subtabulation through the order of will checking meter of RS485 bus; Each electric energy subtabulation judges whether the electric energy meter address that comprises in the order of checking meter is identical with the subtabulation address of electric energy subtabulation self after receiving the order of checking meter; The subtabulation address of the electric energy meter address and electric energy subtabulation self that comprises in the order if check meter is identical, and then the electric energy subtabulation sends to connected electric energy master meter through the RS485 bus with the ammeter data of self adding up; The electric energy master meter sends to acquisition terminal with the ammeter data that the electric energy subtabulation sends through line of electric force.Because acquisition terminal can send to each electric energy master meter with the order of checking meter through line of electric force concomitantly; Each electric energy master meter can send to connected a plurality of electric energy subtabulation through the order of will checking meter of RS485 bus; The electric energy subtabulation directly is not connected with acquisition terminal; Therefore existing power line facility capable of using networking, simultaneously the complexity of simplified wiring, reduce the cost of checking meter, improve the speed of checking meter.
Acquisition terminal can report server with ammeter data by wireless mode after receiving ammeter data.
Another specific embodiment according to the present invention, (Orthogonal Frequency Division Multiplexing, be called for short: OFDM) modulation technique and each electric energy master meter carry out information interaction to acquisition terminal through OFDM.Through adopting the OFDM modulation technique, can further improve the transfer rate of power line communication.For example in the OFDM modulation technique; Each subcarrier can adopt phase-shift keying (PSK) (phase-shift keying; Be called for short: PSK) or quadrature amplitude modulation (Quadrature Amplitude Modulation; Be called for short: QAM) technology, flank speed can reach 200Mbit/s, and actual transfer rate is 1Mbit/s-90Mbit/s.In this case, with respect to traditional electric energy meter, can the electric energy master meter that the present invention relates to be called the broadband electric energy meter.
Fig. 2 is the synoptic diagram of another embodiment of remote meter reading method of the present invention.As shown in Figure 2, the remote meter reading method of this embodiment is following:
Step 201, acquisition terminal sends the order of checking meter through line of electric force to each electric energy master meter, comprises the electric energy meter address in the order of checking meter.
Step 202, each electric energy master meter judge whether the electric energy meter address that comprises in the order of checking meter is identical with the master meter address of self after receiving the order of checking meter.If the master meter address of electric energy meter address and electric energy master meter self is identical, then execution in step 203; If the master meter address of electric energy meter address and electric energy master meter self is different, then execution in step 204.
Step 203, the electric energy master meter sends to acquisition terminal with the ammeter data of self statistics through line of electric force.Execution in step 209 then.
Step 204, the electric energy master meter sends to connected each electric energy subtabulation through the order of will checking meter of RS485 bus.
Step 205, each electric energy subtabulation judge whether the electric energy meter address that comprises in the order of checking meter is identical with the subtabulation address of electric energy subtabulation self after receiving the order of checking meter.The subtabulation address of the electric energy meter address and electric energy subtabulation self that comprises in the order if check meter is different, and then execution in step 206; The subtabulation address of the electric energy meter address and electric energy subtabulation self that comprises in the order if check meter is identical, and then execution in step 207.
Step 206, electric energy subtabulation abandon the said order of checking meter.Afterwards, no longer carry out other step of present embodiment.
Step 207, the electric energy subtabulation sends to connected electric energy master meter through the RS485 bus with the ammeter data of self adding up.
Step 208, the electric energy master meter sends to acquisition terminal with the ammeter data that the electric energy subtabulation sends through line of electric force.
Step 209, acquisition terminal judge whether to receive ammeter data in the schedule time scope after order is checked meter in transmission; If do not receive ammeter data in the scope at the fixed time, then execution in step 210; If receive ammeter data in the scope at the fixed time, then execution in step 211.
Step 210, acquisition terminal is confirmed electric energy master meter or the electric energy subtabulation operation irregularity corresponding with said electric energy meter address.Afterwards, no longer carry out other step of present embodiment.
Step 211, acquisition terminal reports main website with the ammeter data that the electric energy master meter sends.
Acquisition terminal can report main website with ammeter data by wireless mode after receiving ammeter data.
Fig. 3 is the synoptic diagram of an embodiment of electric energy master meter of the present invention.As shown in Figure 3, the electric energy master meter comprises:
Reading unit 303; Be used for judged result according to recognition unit 302; The master meter address of the electric energy meter address and electric energy master meter self that comprises in the order if check meter is identical; Then read the ammeter data of electric energy master meter self statistics, and ammeter data is sent to first communication unit 301 from storage unit 305.
Based on the electric energy master meter that the above embodiment of the present invention provides, receive acquisition terminal and send the order of checking meter to each electric energy master meter through line of electric force, comprise the electric energy meter address in the order of checking meter; Each electric energy master meter judges whether the electric energy meter address that comprises in the order of checking meter is identical with the master meter address of self after receiving the order of checking meter; The master meter address of the electric energy meter address and electric energy master meter self that comprises in the order if check meter is identical, and then the electric energy master meter sends to acquisition terminal with the ammeter data of self adding up through line of electric force; The master meter address of the electric energy meter address and electric energy master meter self that comprises in the order if check meter is different, and then the electric energy master meter sends to connected each electric energy subtabulation through the order of will checking meter of RS485 bus; The electric energy master meter sends to acquisition terminal with the ammeter data that the electric energy subtabulation sends through line of electric force.Because acquisition terminal can send to each electric energy master meter with the order of checking meter through line of electric force concomitantly; Each electric energy master meter can send to connected a plurality of electric energy subtabulation through the order of will checking meter of RS485 bus; The electric energy subtabulation directly is not connected with acquisition terminal; Therefore existing power line facility capable of using networking, simultaneously the complexity of simplified wiring, reduce the cost of checking meter, improve the speed of checking meter.
Another specific embodiment according to the present invention, first communication unit can carry out information interaction with acquisition terminal through the OFDM technology.In this case, with respect to traditional electric energy meter, can the electric energy master meter that the present invention relates to be called the broadband electric energy meter.
Fig. 4 is the synoptic diagram of another embodiment of electric energy master meter of the present invention.Compare with embodiment illustrated in fig. 3, the electric energy metrical unit 401 that also comprises embodiment illustrated in fig. 4 is used for adding up through the electric energy of electric energy master meter, and ammeter data is stored in the storage unit 305.
Fig. 5 is the synoptic diagram of an embodiment of electric energy subtabulation of the present invention.As shown in Figure 5, the electric energy subtabulation comprises:
Judging unit 502 is used for judging whether the electric energy meter address that order comprises of checking meter is identical with the subtabulation address of electric energy subtabulation self.
Reading unit 503; Be used for judged result according to judging unit 502; The subtabulation address of the electric energy meter address and electric energy subtabulation self that comprises in the order if check meter is identical, then reads the ammeter data of electric energy subtabulation self statistics from storage unit 504, and ammeter data is sent to communication unit 501.
Based on the electric energy subtabulation that the above embodiment of the present invention provides, each electric energy subtabulation judges whether the electric energy meter address that comprises in the order of checking meter is identical with the subtabulation address of electric energy subtabulation self after receiving the order of checking meter of electric energy master meter through the transmission of RS485 bus; The subtabulation address of the electric energy meter address and electric energy subtabulation self that comprises in the order if check meter is identical, and then the electric energy subtabulation sends to connected electric energy master meter through the RS485 bus with the ammeter data of self adding up.Because each electric energy master meter can send to connected a plurality of electric energy subtabulation through the order of will checking meter of RS485 bus; The electric energy subtabulation directly is not connected with acquisition terminal; Therefore existing power line facility capable of using networking, simultaneously the complexity of simplified wiring, reduce the cost of checking meter, improve the speed of checking meter.
Another specific embodiment according to the present invention, reading unit 503 also is used for the judged result according to judging unit, if the subtabulation address of the electric energy meter address and electric energy subtabulation self that comprises in the order of checking meter is different, then abandons the said order of checking meter.
Fig. 6 is the synoptic diagram of another embodiment of electric energy subtabulation of the present invention.Compare with embodiment illustrated in fig. 5, the electric energy metrical unit 601 that also comprises embodiment illustrated in fig. 6 is used for the electric energy through the electric energy subtabulation is measured, and ammeter data is stored in the storage unit 504.
In the present invention, the electric energy master meter is compared with the electric energy subtabulation, and difference only is that the electric energy master meter is furnished with first communication unit.Therefore when the electric energy master meter because of outside cause can't operate as normal the time, first communication unit in the electric energy master meter is reinstalled on connected certain electric energy subtabulation, then this electric energy subtabulation just becomes the electric energy master meter, the function of execution electric energy master meter.Thereby help realizing dynamic group net, reduce networking cost.
Fig. 7 is the synoptic diagram of an embodiment of long-distance meter-reading system of the present invention.As shown in Figure 7, long-distance meter-reading system comprises:
Electric energy master meter 702 is used for after receiving the order of checking meter, and judges whether the electric energy meter address that comprises in the order of checking meter is identical with the master meter address of electric energy master meter self; The master meter address of the electric energy meter address and electric energy master meter self that comprises in the order if check meter is identical, and then the ammeter data with electric energy master meter self statistics sends to acquisition terminal 701 through line of electric force; The master meter address of the electric energy meter address and electric energy master meter self that comprises in the order if check meter is different, then sends to connected each electric energy subtabulation 703 through the order of will checking meter of RS485 bus; The ammeter data that the electric energy subtabulation is sent through the RS485 bus sends to acquisition terminal 701 through line of electric force;
Long-distance meter-reading system based on the above embodiment of the present invention provides sends check meter order through line of electric force to each electric energy master meter through acquisition terminal, comprises the electric energy meter address in the order of checking meter; Each electric energy master meter judges whether the electric energy meter address that comprises in the order of checking meter is identical with the master meter address of self after receiving the order of checking meter; The master meter address of the electric energy meter address and electric energy master meter self that comprises in the order if check meter is identical, and then the electric energy master meter sends to acquisition terminal with the ammeter data of self adding up through line of electric force; The master meter address of the electric energy meter address and electric energy master meter self that comprises in the order if check meter is different, and then the electric energy master meter sends to connected each electric energy subtabulation through the order of will checking meter of RS485 bus; Each electric energy subtabulation judges whether the electric energy meter address that comprises in the order of checking meter is identical with the subtabulation address of electric energy subtabulation self after receiving the order of checking meter; The subtabulation address of the electric energy meter address and electric energy subtabulation self that comprises in the order if check meter is identical, and then the electric energy subtabulation sends to connected electric energy master meter through the RS485 bus with the ammeter data of self adding up; The electric energy master meter sends to acquisition terminal with the ammeter data that the electric energy subtabulation sends through line of electric force.Because acquisition terminal can send to each electric energy master meter with the order of checking meter through line of electric force concomitantly; Each electric energy master meter can send to connected a plurality of electric energy subtabulation through the order of will checking meter of RS485 bus; The electric energy subtabulation directly is not connected with acquisition terminal; Therefore existing power line facility capable of using networking, simultaneously the complexity of simplified wiring, reduce the cost of checking meter, improve the speed of checking meter.
The electric energy meter address that another specific embodiment according to the present invention, electric energy subtabulation 703 also are used for comprising in the order of checking meter and the subtabulation address of electric energy subtabulation self abandon the said order of checking meter not simultaneously.
Another specific embodiment according to the present invention, acquisition terminal 701 also are used for after order is checked meter in transmission, judge whether to receive ammeter data in the scope at the fixed time; If do not receive ammeter data in the scope at the fixed time, then confirm electric energy master meter or the electric energy subtabulation operation irregularity corresponding with said electric energy meter address; If receive ammeter data in the scope at the fixed time, the ammeter data that then the electric energy master meter is sent reports main website.
Acquisition terminal can report main website with ammeter data by wireless mode after receiving ammeter data.
Another specific embodiment according to the present invention, acquisition terminal 701 carries out information interaction through OFDM modulation technique and each electric energy master meter.
Another specific embodiment according to the present invention, electric energy master meter 702 be Fig. 3 or embodiment illustrated in fig. 4 in the electric energy master meter, electric energy subtabulation 703 be Fig. 5 or embodiment illustrated in fig. 6 in the electric energy subtabulation.
Description of the invention provides for example with for the purpose of describing, and is not the disclosed form that exhaustively perhaps limit the invention to.A lot of modifications and variation are obvious for those of ordinary skill in the art.Selecting and describing embodiment is for better explanation principle of the present invention and practical application, thereby and makes those of ordinary skill in the art can understand the various embodiment that have various modifications that the present invention's design is suitable for special-purpose.
Claims (14)
1. a remote meter reading method is characterized in that, comprising:
Acquisition terminal sends the order of checking meter through line of electric force to each electric energy master meter, comprises the electric energy meter address in the order of checking meter;
Each electric energy master meter judges whether the electric energy meter address that comprises in the order of checking meter is identical with the master meter address of self after receiving the order of checking meter;
The master meter address of the electric energy meter address and electric energy master meter self that comprises in the order if check meter is identical, and then the electric energy master meter sends to acquisition terminal with the ammeter data of self adding up through line of electric force;
The master meter address of the electric energy meter address and electric energy master meter self that comprises in the order if check meter is different, and then the electric energy master meter sends to connected each electric energy subtabulation through the order of will checking meter of RS485 bus;
Each electric energy subtabulation judges whether the electric energy meter address that comprises in the order of checking meter is identical with the subtabulation address of electric energy subtabulation self after receiving the order of checking meter;
The subtabulation address of the electric energy meter address and electric energy subtabulation self that comprises in the order if check meter is identical, and then the electric energy subtabulation sends to connected electric energy master meter through the RS485 bus with the ammeter data of self adding up;
The electric energy master meter sends to acquisition terminal with the ammeter data that the electric energy subtabulation sends through line of electric force.
2. method according to claim 1 is characterized in that,
The subtabulation address of the electric energy meter address and electric energy subtabulation self that comprises in the order if check meter is different, and then the electric energy subtabulation abandons the said order of checking meter.
3. method according to claim 1 and 2 is characterized in that,
Acquisition terminal judges whether to receive ammeter data in the scope at the fixed time after order is checked meter in transmission;
If do not receive ammeter data in the scope at the fixed time, then confirm electric energy master meter or the electric energy subtabulation operation irregularity corresponding with said electric energy meter address;
If receive ammeter data in the scope at the fixed time, the ammeter data that then the electric energy master meter is sent reports main website.
4. method according to claim 1 and 2 is characterized in that,
Acquisition terminal carries out information interaction through OFDM modulation technique and each electric energy master meter.
5. an electric energy master meter is characterized in that, comprising:
First communication unit is used to receive acquisition terminal through the order of checking meter that line of electric force sends, and comprises the electric energy meter address in the order of checking meter; After receiving the ammeter data that sends in reading unit or second communication unit, ammeter data is sent to acquisition terminal through line of electric force;
Recognition unit is used for judging whether the electric energy meter address that order comprises of checking meter is identical with the master meter address of electric energy master meter self;
Reading unit; Be used for judged result according to recognition unit; The master meter address of the electric energy meter address and electric energy master meter self that comprises in the order if check meter is identical, then reads the ammeter data of electric energy master meter self statistics from storage unit, and ammeter data is sent to first communication unit;
The second communication unit is used for the judged result according to recognition unit, if the master meter address of the electric energy meter address and electric energy master meter self that comprise in the order of checking meter is different, then sends to each the electric energy subtabulation that is connected with the electric energy master meter through the order of will checking meter of RS485 bus; And when receiving the ammeter data that the electric energy subtabulation sends through the RS485 bus, the ammeter data that the electric energy subtabulation is sent sends to first communication unit;
Storage unit is used for the ammeter data that storage of electrical energy master meter self is added up.
6. electric energy master meter according to claim 5 is characterized in that, also comprises:
The electric energy metrical unit is used for adding up through the electric energy of electric energy master meter, and ammeter data is stored in the storage unit.
7. an electric energy subtabulation is characterized in that, comprising:
Communication unit is used to receive the order of checking meter that the electric energy master meter sends through the RS485 bus, comprises the electric energy meter address in the order of wherein checking meter; And when receiving the ammeter data of reading unit transmission, ammeter data is sent to the electric energy master meter through the RS485 bus;
Judging unit is used for judging whether the electric energy meter address that order comprises of checking meter is identical with the subtabulation address of electric energy subtabulation self;
Reading unit; Be used for judged result according to judging unit; The subtabulation address of the electric energy meter address and electric energy subtabulation self that comprises in the order if check meter is identical, then reads the ammeter data of electric energy subtabulation self statistics from storage unit, and ammeter data is sent to communication unit;
Storage unit is used for the ammeter data that storage of electrical energy subtabulation self is added up.
8. electric energy subtabulation according to claim 7 is characterized in that,
Reading unit also is used for the judged result according to judging unit, if the subtabulation address of the electric energy meter address and electric energy subtabulation self that comprises in the order of checking meter is different, then abandons the said order of checking meter.
9. according to claim 7 or 8 described electric energy subtabulations, it is characterized in that, also comprise:
The electric energy metrical unit is used for the electric energy through the electric energy subtabulation is measured, and ammeter data is stored in the storage unit.
10. a long-distance meter-reading system is characterized in that, comprising:
Acquisition terminal is used for sending the order of checking meter through line of electric force to each electric energy master meter, comprises the electric energy meter address in the order of checking meter; The ammeter data that the electric energy master meter is sent reports main website;
The electric energy master meter is used for after receiving the order of checking meter, and judges whether the electric energy meter address that comprises in the order of checking meter is identical with the master meter address of electric energy master meter self; The master meter address of the electric energy meter address and electric energy master meter self that comprises in the order if check meter is identical, and then the ammeter data with electric energy master meter self statistics sends to acquisition terminal through line of electric force; The master meter address of the electric energy meter address and electric energy master meter self that comprises in the order if check meter is different, then sends to connected each electric energy subtabulation through the order of will checking meter of RS485 bus; The ammeter data that the electric energy subtabulation is sent through the RS485 bus sends to acquisition terminal through line of electric force;
The electric energy subtabulation is used for after receiving the order of checking meter, and judges whether the electric energy meter address that comprises in the order of checking meter is identical with the subtabulation address of electric energy subtabulation self; The subtabulation address of the electric energy meter address and electric energy subtabulation self that comprises in the order if check meter is identical, then through the RS485 bus ammeter data of self adding up is sent to connected electric energy master meter.
11. system according to claim 10 is characterized in that,
The electric energy meter address that the electric energy subtabulation also is used for comprising in the order of checking meter and the subtabulation address of electric energy subtabulation self abandon the said order of checking meter not simultaneously.
12. according to claim 10 or 11 described systems, it is characterized in that,
Acquisition terminal also is used for after order is checked meter in transmission, judges whether to receive ammeter data in the scope at the fixed time; If do not receive ammeter data in the scope at the fixed time, then confirm electric energy master meter or the electric energy subtabulation operation irregularity corresponding with said electric energy meter address; If receive ammeter data in the scope at the fixed time, the ammeter data that then the electric energy master meter is sent reports main website.
13. according to claim 10 or 11 described systems, it is characterized in that,
Acquisition terminal carries out information interaction through OFDM modulation technique and each electric energy master meter.
14. according to claim 10 or 11 described systems, it is characterized in that,
The electric energy master meter is claim 5 or 6 described electric energy master meters;
The electric energy subtabulation is each described electric energy subtabulation among the claim 7-9.
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