CN2494989Y - Low-voltage power line carrier collector - Google Patents

Abstract

The utility model relates to an intelligent low-voltage power line carrier collector installed in an electric energy meter, which is composed of a main control CPU unit circuit 3, a pulse unit circuit 2, a memory unit circuit 4, an infrared receiving and transmitting unit circuit 6, a carrier communication unit circuit 7, etc. In the practical application, the utility model can simultaneously collect the electric energy information data of four users' electric meters and transmit the treated information data to station zone carrier equipment and a concentrator through a low-voltage carrier collecting and reading technology. The utility model has the advantages of reasonable structure, low cost, strong interference rejection, wide application range, etc., the application and the popularization of the carrier collector can lay the good foundation for national power companies to implement the power consumption management, such as one consumer with one electric meter, concentrated meter reading, bank networks, etc., and meanwhile, the utility model also provides wide development space for the marketing modernization of power systems.

Description

Low-voltage power line carrier acquisition device

The utility model belongs to the electric variable measurement technical field, relates to a kind of intelligent type low-voltage power circuit carrier acquisition device of installing in electric energy meter.

In recent years, carrying out and development along with urban and urual areas of whole country's electric network reconstruction engineering of implementing that Every household has an ammeter, the quantity of single-phase watt-hour meter is installed increases sharply, the greatest problem of thereupon bringing be exactly in the past the manual metering pattern that follows for a long time of power department can't adapt to this variation at all, so the intelligent pattern of checking meter is just arisen at the historic moment.At present, in many intelligent meter copying devices, the harvester that utilizes low-voltage power line ZAP transmission data is widely adopted because it has the efficient height, is convenient to computer management, is beneficial to and sets up perfect charging sale of electricity network and can include advantage such as Service Synthesis Management System in.But existing more known carrier acquisition devices all have some defectives in actual applications to some extent, as the patent No. is that 96202199 " intelligent carrier meter reading device " and the patent No. are that " power circuit intelligent meter data recording instrument " two patented technology products of 97215370 are and adopt ZAP to realize the device that the ammeter electric weight is copied and accepted and transmitted, their corresponding means of communication that all have are single, poor anti jamming capability, weak points such as transmission quality requirements height to power circuit, and its product general only Disturbance in Power Net less among a small circle in certain use value is arranged, when when the large tracts of land scope is used, because Disturbance in Power Net is bigger, it is low that they all can occur copying and accepting success ratio, signal is flooded by noise and electric weight such as can't copy and accept at phenomenon.

The purpose of this utility model is to overcome the defective that prior art exists, and provides that a kind of structural behaviour is rationally reliable, easy to use, efficient, cost is low, need not to invest in dedicated data transmission passage and the wide low-voltage power line carrier acquisition device of usable range.

Be used to realize that the technical solution of foregoing invention purpose is such: the low-voltage power line carrier acquisition device that is provided be a kind of be installed in the electric energy meter gather 1 to 4 electric supply meter electric energy information and will handle thereupon after information data deliver to the specialized equipment of platform district carrier terminal equipment and concentrator by the low-voltage collecting meter reading ZAP, it contains the master cpu element circuit, the pulse unit circuit, the memory unit circuit, infrared receiving/transmission element circuit and carrier communication element circuit, wherein the input end of pulse unit circuit inserts the electrical energy pulse signal of 4 road electric energy meters by interface card, and the electrical energy pulse input end of output terminal and cpu circuit links to each other; The I/O end of infrared receiving/transmission element circuit connects with the infrared communication signal output/input end of cpu circuit; The I/O termination of carrier communication element circuit is gone into the carrier communication signal output/input end of cpu circuit; The storage signal output/input end of the I/O end of memory unit circuit and cpu circuit joins.In the use, this collector adopts four tunnel pulses input by the pulse unit circuit, and 1～4 electric supply meter electric energy information is reached the master cpu element circuit, can realize the collection of an acquisition terminal to 4 ammeter electric energy datas; The built-in highly reliable non-volatile memory unit circuit of collector (RAM) can be used for writing down and store Various types of data information such as the various parameters of transformer operation and user power utilization amount; Built-in infrared receiving/transmission element circuit can carry out parameter setting and data query to acquisition terminal by infrared communication port; Built-in carrier communication unit can provide the carrier communication of long-haul reliable; Master cpu element circuit in the utility model adopts the anti-interference 8-bit microcontroller of high-performance, can manage and control according to the every function of steering order to the carrier acquisition terminal.

Design for intelligent kilowatt meter recorder, generally at first all require it must have the efficient height, accurately, reliably, in time, performance easily, secondly then require it to be convenient to computer management as much as possible, be beneficial to and set up perfect charging sale of electricity network and can include Service Synthesis Management System in, low-voltage power line carrier acquisition device described in the utility model decapacitation is satisfied above-mentioned requirements and can greatly be increased work efficiency, for society saves outside the labour, biggest advantage is exactly that cost is low, antijamming capability is strong, do not need to invest in special-purpose data transmission channel, place to all dress tables all possesses the condition of checking meter, wide adaptability, its Products Development application can be State Power Corporation's enforcement, and Every household has an ammeter, centralized automatic meter-reading, bank's networking waits the management of power use to lay good basis, also provides wide development space for electric system marketing modernization simultaneously.

Below with reference to accompanying drawing the utility model content is described further.

Fig. 1 is the design concept block diagram of low-voltage power line carrier acquisition device described in the utility model.

Fig. 2～Fig. 4 is the circuit on line figure of a kind of specific embodiment structure of the utility model, wherein Fig. 2 is the on line figure of master cpu element circuit, pulse unit circuit and memory unit embodiment of circuit structure, Fig. 3 is the on line figure of infrared receiving/transmission element circuit, and Fig. 4 is the on line figure of carrier communication element circuit.

Referring to accompanying drawing 1, the circuit structure of low-voltage power line carrier acquisition device described in the utility model mainly comprises by master cpu element circuit 3, the control that pulse unit circuit 2 and memory unit circuit 4 constitute, the storage part, the infrared communication part that constitutes by infrared receiving/transmission element circuit 6, carrier communication part that constitutes by carrier communication element circuit 7 and the power unit that constitutes by power supply unit circuit 5 totally four parts (sequence number 1 representative is from the electric flux pulse of electric supply meter in the accompanying drawing 1, sequence number 8 expression civil powers), the composition of each several part circuit structure and working forms are as described below respectively.

One, control, storage part:

The embodiment circuit structure of control, storage part as shown in Figure 2, master cpu element circuit 3 wherein is made of the anti-interference 8-bit microcontroller U1 of 286E33 type high-performance, level pull-up circuit that pulse unit circuit 2 is made up of resistance R 5～R8, light emitting diode L6～L9 and the filtering circuit of being made up of capacitor C 7～C10 constitute, and memory unit circuit 4 is that elements such as the memory chip U2 of 24C04 and resistance R 11, R15, capacitor C 2～C5, C13, C16 constitute by model.In the circuit structure of this part, U1 and U2 are the core component of total system.The electrical energy pulse signal of four tunnel user's electric energy meters inserts by interface card CON8 during work, this electrical energy pulse signal is through resistance R 5～R8, the level pull-up circuit that light emitting diode L6～L9 forms and input to the P2.3 of single-chip microcomputer U1 by the filtering circuit that capacitor C 7～C10 forms, P2.2, P2.1, the P2.0 port, wherein the main effect of light emitting diode L6～L9 is to show the electrical energy pulse signal, light emitting diode L6～L9 is in cut-off state during no electrical energy pulse signal, light emitting diode L6～L9 is in the luminous indication of conducting state when electrical energy pulse, resistance R 5～R8 plays metering function, the filtering circuit that capacitor C 7～C10 forms can be used for preventing that the interference that impulse circuit seals in from bringing miscount, and single-chip microcomputer U1 is to input P2.3, P2.2, P2.1, four road electrical energy pulses of P2.0 port carry out digital filtering and differentiate, add up and store.Resistance R 23 is the pull-up resistor of single-chip microcomputer U1 port P0.2 among Fig. 2.The P0.1 port of single-chip microcomputer U1 is the delivery outlet of infrared communication signal, and the infrared communication digital signal that single-chip microcomputer U1 will send out removes to control the infrared communication radiating circuit by the output of P0.1 port.The P3.3 port of single-chip microcomputer U1 is the input port of infrared communication signal, and single-chip microcomputer U1 obtains all kinds of infrared control instructions by this port from infrared receiving circuit.The P2.4 port of single-chip microcomputer U1 is the mouth that enables of writing the internal operation parameter, this port just joins by resistance R 10 and power supply, join by bouncing pilotage switch S 1 and power supply ground, the bouncing pilotage of S1 short circuit at ordinary times open circuit P2.4 port keeps high level, forbid writing of all operational factors, must be in the time will changing operational factor with the short circuit of S1 short circuit bouncing pilotage, operational factor just can write.The P3.2 port of single-chip microcomputer U1 is the synchronous signal input end mouth of system carrier, this synchronizing signal obtains from the carrier communication element circuit by light lotus root O1 (see figure 4), the P3.1 port of single-chip microcomputer U1 connects positive source, the XTAL1 of single-chip microcomputer U1, XTAL2 port are the system clock input/output port, XTAL1, XTAL2 port insert crystal oscillator X1, can guarantee the accurate of system clock.The P2.6 of single-chip microcomputer U1 and P2.7 port are the external memory interface of system, its P2.7 port joins by data I/O port SDA of anti-high frequency reflection interference resistance R 15 and external memory storage U2, the data that can write and read external memory storage U2 by this port single-chip microcomputer U1; The data clock port SCL of the P2.6 port of single-chip microcomputer U1 and external memory storage U2 joins, for external memory storage U2 provides the reading and writing data clock, resistance R 11 is the pull-up resistor of external memory storage U2 data I/O port SDA, and capacitor C 16 is the anti-high frequency interference electric capacity of this port.External memory storage U2 is the nonvolatile memory of the iic bus agreement of 512 bytes, can guarantee power down after data do not lose, capacitor C 13 is the shunt capacitance of external memory storage U2.The P2.5 port of single-chip microcomputer U1 is the receiving end of carrier communication data, this port obtains carrier communication data from carrier communication element circuit 7 by light lotus root O2 (Fig. 4), the P0.0 port of single-chip microcomputer U1 is the transmitting terminal of carrier communication data, and this port is sent to the inner parameter data on the carrier communication element circuit by light lotus root O3 (Fig. 4) and sends.

Two, infrared communication part

The embodiment circuit structure of infrared communication part as shown in Figure 3, it is made up of infrared transtation mission circuit 61 and infrared receiving circuit 62.By model is integrated circuit U4 and the resistance R 21 of NE555, R22 and capacitor C 17, C18 forms the time base circuit of infrared transmission, the output terminal of integrated circuit U4 goes to control the conducting of triode Q2 and end, timebase frequency is about 38KHz, change resistance R 21, the timebase frequency of the whole infrared transtation mission circuit of the adjustable size of R22 and capacitor C 18 numerical value, the triode Q1 conducting and the control signal of ending are from the P1.0 port of single-chip microcomputer U1, whether infrared transmitting tube D2 controls according to the conducting of triode Q1, because triode Q1, Q2 adopts the series connection emission, the infrared data signal that infrared transmitting tube D2 sends will be modulated on the fundamental frequency of 38KHz, improve antijamming capability.Infrared receiving circuit 62 is that the infrared receiving integrate circuit U3 of special-purpose monolithic and resistance R 16, the filter capacitor C15 of RFCEIVER forms by model, and the signal output part VOUT of U3 is connected to the P3.3 port of single-chip microcomputer U1, finishes the reception and the transmission of infrared signal.

Three, carrier communication part

The embodiment circuit structure of carrier communication part as shown in Figure 3, it is that the special carrier communication module J1 of 12PIN is a core by model, the port one of carrier communication module J 1 is by resistance R 13, the parallel connection of capacitor C 14 inserts the port 3 of civil power zero line and module, R13 and C14 constitute the resistance-capacitance depressurization circuit, the port 5 of carrier communication module J 1,6 insert the ground of 10V power supply, port 8 inserts the positive pole of 10V power supply, port 9 is the synchronous signal output end of carrier communication module, it transmits to main control part by current-limiting resistance R1 and light lotus root O1, port one 0 is a data output end, it transmits the carrier communication data that receive by resistance R 9 and light lotus root O2 to main control part, port one 1 is a data input pin, it obtains by the outside communication data that transmits of main control part by current-limiting resistance R18 and light lotus root O3, port one 2 is the carrier communication indication end, light emitting diode L1 and current-limiting resistance R12 insert this end, and this is held and is low level when carrier communication, and light emitting diode is lighted indication work.

Four, power unit

The power unit of system mainly is that the form by transformer, rectification circuit and mu balanced circuit provides, and is known mature technology, and this paper does not do and gives unnecessary details.

Claims (2)

1, a kind of low-voltage power line carrier acquisition device, it is characterized in that it contains master cpu element circuit (3), pulse unit circuit (2), memory unit circuit (4), infrared receiving/transmission element circuit (6) and carrier communication element circuit (7), wherein the input end of pulse unit circuit (2) inserts the electrical energy pulse signal of 4 road electric energy meters by interface card, and output terminal links to each other with the electrical energy pulse input end of cpu circuit (3); The I/O end of infrared receiving/transmission element circuit (6) connects with the infrared communication signal output/input end of cpu circuit (3); The I/O termination of carrier communication element circuit (7) is gone into the carrier communication signal output/input end of cpu circuit (3); The storage signal output/input end of the I/O end of memory unit circuit (4) and cpu circuit (3) joins.

2, low-voltage power line carrier acquisition device as claimed in claim 1, it is characterized in that master cpu element circuit (3) is made of 286E33 type 8-bit microcontroller U1, the P2.0 of this single-chip microcomputer～P2.3 end is external to the output terminal of pulse unit circuit (2), its P0.1 port and P3.3 port connect with the output terminal and the input end of infrared receiving/transmission element circuit (6) respectively, its P2.5 end links to each other with receiving end with the transmitting terminal of carrier communication element circuit (7) respectively with the P0.0 end, and the data I of memory unit circuit (4)/O port and data clock port are attached to the P2.7 port and the P2.6 port of 286E33 single-chip microcomputer respectively.

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