CN102711102B - Wireless meter reading system - Google Patents
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Abstract
The invention discloses a wireless meter reading system in the field of intelligent power grids. The wireless meter reading system comprises electric energy meters, acquirers and a concentrator, wherein the concentrator is connected with K acquirers, each acquirer is connected with a plurality of electric energy meters through an RS85 bus, K is a natural number, each acquirer comprises a first wireless communication module and a first sensor, the first wireless communication module comprises a first modulator-demodulator, the concentrator comprises a second wireless communication module and a second sensor, the second wireless communication module comprises a second modulator-demodulator, a first encryption/decryption module is arranged on each acquirer, and a second encryption/decryption module is arranged on the concentrator. The invention has the technical scheme that power utilization or radio frequency signals of acquired instructions are encrypted, thus the power utilization or acquired instructions are prevented from being intercepted by an illegal user intruding into a wireless network, therefore, the meter reading work is safely and accurately carried out.
Description
Technical field
The present invention relates to a kind of wireless kilowatt meter reading-out system for intelligent grid field.
Background technology
Kilowatt meter reading-out system is that intelligent grid is made a copy of the data on user's side ammeter, and by these data feedbacks the system to power supply department.Can kilowatt meter reading-out system promptly and accurately be made a copy of these data and feed back to power supply department has vital impact for the safe operation of whole electrical network.Therefore kilowatt meter reading-out system is indispensable key components in whole intelligent grid.Wireless kilowatt meter reading-out system is a kind of kilowatt meter reading-out system of promoting the use of at present, it utilizes wireless sensor network WSN (Wireless Sensor Networks) to carry out the transmission of data, described wireless sensor network is the common name of a series of micropower mechanicss of communication, it is in low-power consumption, cheaply under prerequisite, the solution communication difficult problem of checking meter, is suitable for that measurement point is many, scope is disperseed the low pressure kilowatt meter reading-out system of occasion.Without wiring, installation cost is low.
Wireless kilowatt meter reading-out system advantage is: wireless kilowatt meter reading-out system has the characteristic of self-organizing network, collector in wireless kilowatt meter reading-out system can be found all concentrator and repeater radio nodes in radio-frequency region, be not subject to the impact of power line topological network, under certain condition simultaneously, concentrator and repeater radio node all in radio-frequency region are more, the selectable routed path of described concentrator is more, has improved kilowatt meter reading-out system network reliability; Wireless kilowatt meter reading-out system channel quality is not subject to the impact of power grid quality, easily guarantees channel long-term reliability, correspondingly can adapt to the new and old city rural community situation of on-the-spot different power grid environments.Simultaneously the real-time of wireless kilowatt meter reading-out system is good, and speed is higher, is convenient to realize value-added service that requirement of real-time is high as remote pre-payment etc.Meanwhile, more than wireless kilowatt meter reading-out system can reach 1600b/s for the effective transmission speed of individual data bag, the big data quantity of low-power user three-phase multifunctional table in support.Simultaneously concentrator in the situation that telecommunication channel lost efficacy, can meet an urgent need and the function checked meter in the wireless handheld meter reading terminal scene of realizing, faster than infrared speed, use more convenient.
The shortcoming of described wireless kilowatt meter reading-out system is: wireless kilowatt meter reading-out system data transmit-receive is open type, in radio-frequency region, miscellaneous equipment can be received, disabled user is easy to electricity consumption data to distort, the normal transmission of data and the security of operation of electrical network have been affected, the impact that the transmission range of while wireless kilowatt meter reading-out system is subject to barrier is very large, and barrier can seriously shorten transmission range.
Summary of the invention
The object of the invention is, in order to overcome the deficiencies in the prior art, provides a kind of wireless kilowatt meter reading-out system, and described wireless kilowatt meter reading-out system can prevent that external disabled user from attacking.
A kind of technical scheme that realizes above-mentioned purpose is: a kind of wireless kilowatt meter reading-out system, comprises electric energy meter (1), collector (2) and concentrator (3); Described concentrator (3) connects K described collector (2) by wireless network, and collector described in each (2) connects some electric energy meters (1) by RS485 bus, and described K is natural number; Wherein said collector (2) comprises the first wireless communication module, first sensor and the first single-chip microcomputer, described the first wireless communication module comprises the first modulator-demodulator, described concentrator (3) comprises the second wireless communication module, the second transducer and second singlechip, and described the second wireless communication module comprises second modem; Described concentrator (3), when carrying out power information collection operation, sends information gathering instruction by described second singlechip, and described acquisition instructions is transformed into the radiofrequency signal of acquisition instructions by described second modem; Described first sensor on described collector (2) is after receiving the radiofrequency signal of described acquisition instructions, by the first wireless communication module described in described the first Single-chip Controlling, receive the radiofrequency signal of described acquisition instructions, then by described the first modulator-demodulator, the radiofrequency signal of described acquisition instructions is transformed into acquisition instructions; Described collector (2) passes to described electric energy meter (1) by described acquisition instructions by described RS485 bus, by described electric energy meter (1), carries out power information collection; It is characterized in that: described collector arranges the first encrypting-decrypting module on (2), described concentrator arranges the second encrypting-decrypting module on (3);
Described the first encrypting-decrypting module comprises the first frequency hopping synthesizer, the first frequency hopping controller and the first filter; Described the second encrypting-decrypting module comprises the second frequency hopping synthesizer, the second frequency hopping controller and the second filter;
Described the first frequency hopping controller is controlled the pattern generating of external Frequency Hopping Signal, synchronous, self adaptation; Described the first frequency hopping synthesizer also carries out mixing to the radiofrequency signal of described power information and described external Frequency Hopping Signal, exports satisfactory Frequency Hopping Signal, and launches by described the first wireless communication module; Described the first frequency hopping synthesizer is synthetic required external Frequency Hopping Signal frequency under the control of described the first frequency hopping controller;
In described power information receiving course, first by described the first filter filtering, to eliminate the second frequency hopping synthesizer, carry out the impact that mixing was produced, obtain the radiofrequency signal of described acquisition instructions; And the radiofrequency signal of described acquisition instructions enters described the first modulator-demodulator, through the demodulation of described the first modulator-demodulator, finally obtaining is exactly power information;
Described the second frequency hopping controller is controlled the pattern generating of external Frequency Hopping Signal, synchronous, self adaptation; Described the second frequency hopping synthesizer carries out mixing to the radiofrequency signal of described power information and described external Frequency Hopping Signal, exports satisfactory Frequency Hopping Signal, and launches by described the second wireless communication module; Described the second frequency hopping synthesizer is synthetic required external Frequency Hopping Signal frequency under the control of described the second frequency hopping controller;
In described power information receiving course, first by described the second filter, carry out filtering, to eliminate the first frequency hopping synthesizer, carry out the impact that mixing was produced, obtain the radiofrequency signal of described power information, and the radiofrequency signal of described power information enters described second modem, through the demodulation of described second modem, finally obtaining is exactly power information.
Further, between described concentrator and described collector, wireless repeater is set.
Further, described wireless repeater comprises amplifying circuit and filter circuit.
Further, described wireless network is ZigBee wireless network.
Further, described wireless kilowatt meter reading-out system also comprises summary table, and described summary table is in parallel with described concentrator.
Further, wireless output module is set on described concentrator, connects public outer net.
Adopted the technical scheme of a kind of wireless kilowatt meter reading-out system for intelligent grid field of the present invention, on described radio energy table, the first encrypting-decrypting module has been set, the second encrypting-decrypting module has been set on described concentrator.Its technique effect is: described power information or described in adopt instruction radiofrequency signal be encrypted, the disabled user who prevents the described wireless network of described intrusion intercepts described power information or acquisition instructions, thereby guaranteed to check meter work safety and carrying out accurately, guaranteed the safe operation of electrical network.
Accompanying drawing explanation
Fig. 1 is the structural representation of a kind of wireless kilowatt meter reading-out system of the present invention.
Embodiment
To refer to Fig. 1, in order understanding technical scheme of the present invention better, below by embodiment particularly, and to be described in detail by reference to the accompanying drawings:
Refer to Fig. 1, a kind of wireless kilowatt meter reading-out system of the present invention is a kind of wireless kilowatt meter reading-out system based on wireless sensor network, and a kind of wireless kilowatt meter reading-out system of the present invention comprises electric energy meter 1, collector 2 and concentrator 3; Described concentrator 3 connects K described collector 2 by wireless network, and described in each, collector 2 connects some electric energy meters 1 by RS485 bus, and described K is natural number.First sensor, the first wireless communication module, the first single-chip microcomputer and the first power module are set on wherein said collector 2, on described the first wireless communication module, the first modulator-demodulator are set.Described concentrator 3 arranges the second wireless communication module, the second transducer, second singlechip and second source module, on described the second wireless communication module, second modem is set.
Wherein, described first sensor and described the second transducer are to form the necessary part of wireless sensor network.Described the first power module provides power supply for 2 work of described collector, and described second source module provides power supply for described concentrator 3.What described the first power module and described second source module provided is all DC power supply.
In the present embodiment, wireless sensor network used is ZigBee-network, and ZigBee-network is current the most widely used wireless sensor network.But should be noted that and adopt other wireless sensor network to be also fine.
When described concentrator 3 will carry out power information collection operation, by described second singlechip, send information gathering instruction, and described acquisition instructions is transformed into the radiofrequency signal of acquisition instructions by described second modem.Described first sensor on described collector 2 is after receiving the radiofrequency signal of described acquisition instructions, by the first wireless communication module described in described the first Single-chip Controlling, receive the radiofrequency signal of described acquisition instructions, then by described the first modulator-demodulator, the radiofrequency signal of described acquisition instructions is transformed into acquisition instructions.Then described collector 2 passes to described electric energy meter 1 by described acquisition instructions by described RS485 bus, by described electric energy meter 1, carries out power information collection.
Described electric energy meter 1 is after the user's who makes a copy of power information, through described RS485 bus, pass to described collector 2, described the first modulator-demodulator on described collector 2 changes into described power information the radiofrequency signal of power information, and described the first wireless communication module sends the radiofrequency signal of described power information.
On described concentrator 3, the second transducer is detecting the radiofrequency signal of described power information, by described second singlechip, controls the radiofrequency signal that described the second wireless communication module receives described power information.Described second modem transforms into power information by the radiofrequency signal of described power information, and is kept in the storage chip of described concentrator 3.
In the present embodiment, in order to overcome wireless sensor network, the impact that transmission range is subject to barrier is very large, barrier can seriously shorten the shortcoming of transmission range, in described wireless kilowatt meter reading-out system, be also provided with wireless repeater 4, the 3rd wireless communication module and amplifying circuit is set on described wireless repeater 4, the effect of described the 3rd wireless communication module is: forward the radiofrequency signal of described power information or the radiofrequency signal of described acquisition instructions, be convenient to the radiofrequency signal of described power information or the radiofrequency signal of described acquisition instructions gets around barrier; The effect of described amplifying circuit is: amplify the radiofrequency signal of described power information or the radiofrequency signal of described acquisition instructions, increase the spread scope of the radiofrequency signal of described power information or the radiofrequency signal of described acquisition instructions.Described wireless repeater 4 can be realized by install amplifying circuit additional on described concentrator.
Now, the another one effect of described the first single-chip microcomputer machine is exactly the agreement according to wireless sensor network, selects suitable described wireless repeater 4, completes the transmission of the radiofrequency signal of described power information.The effect of described second singlechip another one is exactly the agreement according to wireless sensor network, selects suitable described wireless repeater 4, completes the transmission of the radiofrequency signal of described acquisition instructions.
The greatest improvement of a kind of wireless kilowatt meter reading-out system of the present invention is, on described collector 2, the first encrypting-decrypting module is set, and on described concentrator 3, the second encrypting-decrypting module is set.In the present invention, two kinds of embodiment are provided.
The first execution mode is: described the first encrypting-decrypting module is an AES module, and described the second encrypting-decrypting module is the 2nd AES module.The effect of a described AES module is by aes algorithm, the radiofrequency signal of described power information to be carried out AES encryption or the radiofrequency signal of described acquisition instructions is carried out to AES deciphering; The effect of described the 2nd AES module is by aes algorithm, the radiofrequency signal of described acquisition instructions to be carried out AES encryption or the radiofrequency signal of described power information is carried out to AES deciphering.Adopt a described AES module, the effect of described the 2nd AES module is: described power information or described acquisition instructions are carried out to high-order encryption end to end, the fail safe that has improved described power information or described acquisition instructions.Aes algorithm is the algorithm that generally acknowledged at present best high-order is encrypted.
The second execution mode: described the first encrypting-decrypting module comprises the first frequency hopping synthesizer, the first frequency hopping controller and the first filter; Described the second encrypting-decrypting module comprises the second frequency hopping synthesizer, the second frequency hopping controller and the second filter; Described the first frequency hopping synthesizer and described the first frequency hopping controller form the first frequency hopper; Described the second frequency hopping synthesizer and described the second frequency hopping controller form the second frequency hopper.
In the process of described power information transmission, in described the first encrypting-decrypting module: described the first frequency hopping controller is core component, its effect comprises pattern generating to external Frequency Hopping Signal, synchronous, self adaptation is controlled etc.; Described the first frequency hopping synthesizer is synthetic required external Frequency Hopping Signal frequency under the control of described the first frequency hopping controller.
In the system of traditional frequency fixing communication, master oscillator is set in wireless communication module, the frequency of oscillation of described master oscillator is fixedly installed, thereby its carrier frequency is fixed.In order to obtain the Frequency Hopping Signal that carrier frequency is saltus step, require the frequency of master oscillator to change in accordance with control command.This generation Frequency Hopping Signal, this device that is similar to master oscillator is frequency hopper.
In the present invention, the radiofrequency signal of described power information can be analog signal or digital signal.Described the first frequency hopping synthesizer also carries out mixing to the radiofrequency signal of described power information and described external Frequency Hopping Signal, exports satisfactory Frequency Hopping Signal, and launches by described the first wireless communication module.This Frequency Hopping Signal also belongs to radiofrequency signal.
In described power information receiving course, first by described the second filter, carry out filtering, to eliminate the first frequency hopping synthesizer, carry out the impact that mixing was produced, obtain the radiofrequency signal of described power information.And the radiofrequency signal of described power information enters described second modem.Through the demodulation of described second modem, finally obtaining is exactly power information.
In order to guarantee quality and the fail safe of described Frequency Hopping Signal, the external Frequency Hopping Signal that the output frequency that requires described power information to export from described the first wireless communication module produces than described frequency hopping controller exceeds an intermediate frequency.Because the frequency of external Frequency Hopping Signal is saltus step, also along with the saltus step rule of extraneous signal, saltus step could obtain a fixing intermediate-freuqncy signal by mixing so to require the frequency of the Frequency Hopping Signal through exporting described in described the first frequency hopping synthesizer mixing.And the described Frequency Hopping Signal that described the second wireless communication module receives compares received intermediate frequency of external Frequency Hopping Signal frequency phase-difference.Be conducive to so described the second filter described Frequency Hopping Signal is carried out to filtering.
The frequency hopping code sequence that described Frequency Hopping Signal is conventional is the pseudo random sequence based on designs such as m sequence, M sequence, RS codes.These pseudo-random code sequences add feedback arrangement by shift register to be realized, and such Frequency Hopping Signal is simple in structure, and stable performance can comparatively fast realize synchronous.They can realize the longer cycle.
Described in employing frequency hopping, the first encrypting-decrypting module comprises the first frequency hopping synthesizer, the first frequency hopping controller and the first filter; Described the second encrypting-decrypting module comprises after the technical scheme of the second frequency hopping synthesizer, the second frequency hopping controller and the second filter, the disguise enhancing during described power information transmission forms, and described power information is also difficult to be intercepted and captured by disabled user.As long as the saltus step rule of the unclear described Frequency Hopping Signal of disabled user, is just difficult to intercept and capture described power information.Meanwhile, the antijamming capability in described power information transmitting procedure strengthens, even have part frequency disturbed in described power information transmitting procedure, still can on other not disturbed frequencies, communicate by letter normally.In described power information transmitting procedure, be also easy to the hardware compatibility with other.
In the process of described acquisition instructions transmission, in described the second encrypting-decrypting module: described the second frequency hopping controller is core component, comprise pattern generating to external Frequency Hopping Signal, synchronous, self adaptation is controlled etc.; Described the second frequency hopping synthesizer is synthetic required external Frequency Hopping Signal frequency under the control of described the second frequency hopping controller.
Then, the radiofrequency signal of described acquisition instructions can be analog signal or digital signal.Described the second frequency hopping synthesizer carries out mixing to the radiofrequency signal of described power information and described external Frequency Hopping Signal, exports satisfactory Frequency Hopping Signal, and launches by described the second wireless communication module.
The radiofrequency signal of described acquisition instructions can be analog signal or digital signal.Described the second frequency hopping synthesizer carries out mixing to the radiofrequency signal of described power information and described external Frequency Hopping Signal, exports satisfactory Frequency Hopping Signal, and launches by described the second wireless communication module.This Frequency Hopping Signal also belongs to radiofrequency signal.
In described power information receiving course, first by described the first filter filtering, to eliminate the second frequency hopping synthesizer, carry out the impact that mixing was produced, obtain the radiofrequency signal of described acquisition instructions.And the radiofrequency signal of described acquisition instructions enters described the first modulator-demodulator, through the demodulation of described the first modulator-demodulator, finally obtaining is exactly power information.Described power information passes to after described electric energy meter by described RS485 bus, carries out the collection of power information.
Wireless kilowatt meter reading-out system of the present invention, also comprises a summary table 5, and described summary table 5 is in parallel with described concentrator 3, for monitoring the power information of electric energy meter 1 described in each, and the power information of electric energy meter described in each is gathered and is added up.
On described concentrator 3, be also provided with wireless communication module, communicate with remote control terminal, and by described public outer net, described power information is passed to described remote control terminal.
In addition, described concentrator 3 and described radio energy table 1 be built-in safety chip all, the safety in transmittance process in order to the described power information of further guarantee and described acquisition instructions.
Those of ordinary skill in the art will be appreciated that, above embodiment is only for the present invention is described, and be not used as limitation of the invention, as long as within the scope of connotation of the present invention, to the variation of the above embodiment, modification, all will drop within the scope of claims of the present invention.
Claims (6)
1. a wireless kilowatt meter reading-out system, comprises electric energy meter (1), collector (2) and concentrator (3); Described concentrator (3) connects K described collector (2) by wireless network, and collector described in each (2) connects some electric energy meters (1) by RS485 bus, and described K is natural number; Wherein said collector (2) comprises the first wireless communication module, first sensor and the first single-chip microcomputer, described the first wireless communication module comprises the first modulator-demodulator, described concentrator (3) comprises the second wireless communication module, the second transducer and second singlechip, and described the second wireless communication module comprises second modem; Described concentrator (3), when carrying out power information collection operation, sends information gathering instruction by described second singlechip, and described acquisition instructions is transformed into the radiofrequency signal of acquisition instructions by described second modem; Described first sensor on described collector (2) is after receiving the radiofrequency signal of described acquisition instructions, by the first wireless communication module described in described the first Single-chip Controlling, receive the radiofrequency signal of described acquisition instructions, then by described the first modulator-demodulator, the radiofrequency signal of described acquisition instructions is transformed into acquisition instructions; Described collector (2) passes to described electric energy meter (1) by described acquisition instructions by described RS485 bus, by described electric energy meter (1), carries out power information collection; It is characterized in that: described collector arranges the first encrypting-decrypting module on (2), described concentrator arranges the second encrypting-decrypting module on (3);
Described the first encrypting-decrypting module comprises the first frequency hopping synthesizer, the first frequency hopping controller and the first filter; Described the second encrypting-decrypting module comprises the second frequency hopping synthesizer, the second frequency hopping controller and the second filter;
Described the first frequency hopping controller is controlled the pattern generating of external Frequency Hopping Signal, synchronous, self adaptation; Described the first frequency hopping synthesizer also carries out mixing to the radiofrequency signal of described power information and described external Frequency Hopping Signal, exports satisfactory Frequency Hopping Signal, and launches by described the first wireless communication module; Described the first frequency hopping synthesizer is synthetic required external Frequency Hopping Signal frequency under the control of described the first frequency hopping controller;
In described power information receiving course, first by described the first filter filtering, to eliminate the second frequency hopping synthesizer, carry out the impact that mixing was produced, obtain the radiofrequency signal of described acquisition instructions; And the radiofrequency signal of described acquisition instructions enters described the first modulator-demodulator, through the demodulation of described the first modulator-demodulator, finally obtaining is exactly power information;
Described the second frequency hopping controller is controlled the pattern generating of external Frequency Hopping Signal, synchronous, self adaptation; Described the second frequency hopping synthesizer carries out mixing to the radiofrequency signal of described power information and described external Frequency Hopping Signal, exports satisfactory Frequency Hopping Signal, and launches by described the second wireless communication module; Described the second frequency hopping synthesizer is synthetic required external Frequency Hopping Signal frequency under the control of described the second frequency hopping controller;
In described power information receiving course, first by described the second filter, carry out filtering, to eliminate the first frequency hopping synthesizer, carry out the impact that mixing was produced, obtain the radiofrequency signal of described power information, and the radiofrequency signal of described power information enters described second modem, through the demodulation of described second modem, finally obtaining is exactly power information.
2. a kind of wireless kilowatt meter reading-out system according to claim 1, is characterized in that: between described concentrator (3) and described collector (2), wireless repeater (4) is set.
3. a kind of wireless kilowatt meter reading-out system according to claim 2, is characterized in that: described wireless repeater (4) comprises amplifying circuit and filter circuit.
4. a kind of wireless kilowatt meter reading-out system according to claim 1, is characterized in that: described wireless network is ZigBee wireless network.
5. a kind of wireless kilowatt meter reading-out system according to claim 1, is characterized in that: described wireless kilowatt meter reading-out system also comprises summary table (5), and described summary table (5) is in parallel with described concentrator (3).
6. a kind of wireless kilowatt meter reading-out system according to claim 1, is characterized in that: described concentrator arranges wireless output module on (3), connects public outer net.
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| CN201210191572.3A CN102711102B (en) | 2012-06-12 | 2012-06-12 | Wireless meter reading system |
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| CN201210191572.3A CN102711102B (en) | 2012-06-12 | 2012-06-12 | Wireless meter reading system |
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Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
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| 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 |
| CN104123822A (en) * | 2013-04-23 | 2014-10-29 | 成都技高科技有限公司 | Water-meter reading system employing photographing direct reading based on wireless ad hoc network |
| CN104283675A (en) * | 2013-07-10 | 2015-01-14 | 中兴通讯股份有限公司 | Concentrator, electricity meter and message processing method of concentrator and electricity meter |
| CN103778773B (en) * | 2014-02-19 | 2016-06-08 | 山东微分电子科技有限公司 | A kind of telesecurity meter register method |
| CN105528886B (en) * | 2016-01-29 | 2018-08-03 | 国网山东省电力公司荣成市供电公司 | A kind of safety long-distance radio meter register charge system |
| CN106373363B (en) * | 2016-10-10 | 2019-07-05 | 深圳供电局有限公司 | Electric energy meter wireless kilowatt meter reading-out system |
| CN107567065B (en) * | 2017-08-16 | 2020-11-10 | 南京天溯自动化控制系统有限公司 | Transparent data transmission method and system based on wireless self-organizing network |
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