A kind of double-channel Automatic meter reading system
Technical field
The utility model relates to the Automatic meter reading system correlative technology field, particularly a kind of double-channel Automatic meter reading system.
Background technology
Along with the fast development of industrial automation, original manual metering is low owing to meter reading efficiency, error rate is high is progressively substituted by remote intelligent meter recording; At present, domestic automatic data logging to ammeter mainly contains RS485, and (RS is the abbreviation of English " Recommended Standard ", the meaning is a proposed standard, RS485 is one of communication interface on the personal computer, by the asynchronous transmission standard interface that EIA formulated) wiredly check meter, wireless short-distance is checked meter, low-voltage power carrier meter reading etc.Adopt wired the checking meter of RS485 the expense height can occur, workload is big, and circuit such as need safeguard at problem; Radio meter register can be subjected to the influence of external factors such as distance, near building and reduce communication quality; And low-voltage power carrier is subjected to power line interference, exists instability in the process of checking meter.
The utility model content
The utility model provides a kind of double-channel Automatic meter reading system, and is bad to solve prior art communication quality on automatic data logging, has instable technical matters.
The utility model adopts following technical scheme:
A kind of double-channel Automatic meter reading system, comprise the electric energy meter that adopts the RS485 communication, collector, concentrator and main website, (be the english abbreviation of General Packer Radio Service by GPRS between main website and the concentrator, GPRS (General Packet Radio Service), it is a kind of wireless, packet-switched technology based on global system for mobile communications, provide end to end, the wireless the Internet protocol connection of wide area) channel carries out telecommunication, adopt wireless and low-voltage powerline carrier communication between concentrator and the collector, collector and more than connecting by the RS485 bus between one the electric energy meter.
Main website is a main website, and native system carries out unified management by being arranged on the software systems in the main website to the electric energy meter in the system.
As a kind of preferred version, a plurality of two-way communication circuits are arranged in the described concentrator, described two-way circuit is wireless and the three-phase carrier communication circuit, and is connected with main website by the GPRS channel.
As further preferred version, described electric energy meter is linked in sequence by the RS485 communication, is connected with collector by the RS485 bus then.
As further preferred version again, described collector comprises data processing controller, and the two-way communication circuit, Acquisition Circuit and the power circuit that are connected respectively with data processing controller, Acquisition Circuit is connected with electric energy meter by 485 buses, described two-way communication circuit is wireless and carrier communication circuit, is connected with concentrator with carrier communication circuit by wireless.
As preferred version further, the electric energy meter of native system is 32.
The utlity model has following characteristics:
1. communicate by letter with the power carrier dual mode by wireless between concentrator and the collector, need not to set up extra communication line, engineering construction is convenient.
2. concentrator and main website are by GPRS channel transmission data information, and transmission speed is fast, and can guarantee the accuracy transmitted.
3. sophisticated software system: realize regularly reporting the fixed point meter reading data, and can guarantee data accurately, reliable; Energy Long-distance Control power on/off realizes the pre-payment management function; Can be long-range to concentrator, collector, ammeter carry out to the time, initialization and parameter setting; Have Equipment Management Function,, the defaulting subscriber is operated a switch, the multiplexing electric abnormality user is monitored and initiatively reports, effectively prevent stealing etc. as the overload alarm.
The utility model adopts the double-channel communication of RS485 bus+wireless/carrier wave, possessed wireless simultaneously and advantages these two kinds of communication modes of power carrier, the reliability and stability of kilowatt meter reading-out system are greatly improved, and realize the data acquisition and processing (DAP) of efficiently and accurately by system software.
Description of drawings
The double-channel Automatic meter reading system arrangement plan that Fig. 1 provides for the utility model;
The electric energy meter structure principle chart that Fig. 2 provides for the utility model;
The collector structure principle chart that Fig. 3 provides for the utility model;
The concentrator structure schematic diagram that Fig. 4 provides for the utility model.
Embodiment
Below in conjunction with accompanying drawing and specific embodiment the utility model is described in more detail.
The concrete scheme of present embodiment is as follows:
As Fig. 1 as showing, the double-channel Automatic meter reading system of present embodiment is by electric energy meter, collector, concentrator, main website forms, wherein electric energy meter is installed concentratedly in power distribution room, the communication terminal of each electric energy meter couples together with connection, link to each other with collector by one 485 bus at last, every information of each electric energy meter will be gathered and write down to collector, mode by wireless or low-voltage power carrier is sent to the information that collects in the concentrator then, concentrator arrives main website of system kilowatt meter reading-out system by the GPRS passage with information transmission, shows every electric energy meter information by kilowatt meter reading-out system.
As shown in Figure 2, the electric energy meter structural principle is made up of signal input circuit, metering units, Single Chip Microcomputer (SCM) system, communicating circuit etc., with the single-chip microcomputer is core, a considerable amount of electric energy meters link together by the RS-485 output interface, by the networking that links to each other with collector of one 485 bus, copy and accept ammeter data easily and accurately again.
As shown in Figure 3, collector is made up of two-way communication circuit, data processing controller, Acquisition Circuit and power circuit, and collector is gathered respectively, handles, stored the signal of several electric energy meter outputs by 485 buses; Then information is transferred to concentrator by wireless and two kinds of communication modes of carrier wave, advantage such as it is low to have a cost, and the transmission data are reliable.
As shown in Figure 4, a plurality of two-way communication circuits are arranged in the concentrator, the present invention adopts wireless and the three-phase carrier communication circuit; Can realize the big scale counting of storing in the collector is copied and accepted according to concentrating automatically by these two kinds of communication modes, and transmit to main website by the GPRS channel.
Native system (is the abbreviation of Data Terminal Unit by main website, the GPRS DTU of system software, index is according to terminal device, can be understood as the next GPRS launch terminal, when communicating, there is DTU certainly in the both link ends of transmission data, under its effect transmitted breath is carried out format conversion and data preparation verification.) transmission terminal, collector, concentrator and electric energy meter form.Guaranteeing that this main website networking and server provide under the situation of IP address and network-side slogan, link to each other with GPRS DTU transmission terminal by broadband network behind the operation native system software, can number at system software display terminal DTU after the successful connection, this moment, system software sent instruction by compiled program to the GPRS of concentrator inside communication port, concentrator recognition instruction and return data are to system software, system software is analyzed and is calculated data, directly shows at system software at last.