CN2247819Y - Cluster type electric civil electric energy meter - Google Patents

Abstract

The utility model relates to a centralized (multi-user) civil electric energy meter which adopts a chip calculator to carry out centralized management, control, calculating, displaying, wireless data communication. Procedures of management, control, calculation, display, etc. are stored in the essential structure in the ROM of the chip calculator before hand. Parameters of electricity consumption of each user are stored in an RAM, which causes that the meter has the functions of measuring various electricity utilization parameters (wattful factors, wattless factors and bills) and electricity limiting protection, enhancing the reliability of measurement. Moreover, after receiving command sent by management staff, the utility model can carry out data communication with a controller of the management staff and output the electricity utilization data of each user, realizing remote meter reading. Services of re-fee rate and prepaying fee can be set. The meter has the advantages of high safety and convenient management and maintenance, belonging to a replacing production of intellectualization.

Description

The civilian electric energy meter of a kind of concentrating type electronics

The utility model belongs to electric energy measurement instrument in the electric energy metrical field, further relates to concentrating type electric energy meter and intellectualized technology.

At present, the civilian electric energy meter of selling on the market, basically all be single list structure form, conclude its principle of work and have three kinds: a, electromagnetic type, promptly utilize the eddy current rotating disk to try hard to recommend moving rotation down at electric current and the common action of alternating magnetic field that produces of potential winding, the rotation number of turns of rotating disk is directly proportional with the electric energy that the user is consumed, and the number of turns that the dial rotation of utilizing register to note is crossed is measured the electric energy that this user consumes; B, electronic type adopts an analog multiplier, and user's electric current, voltage signal directly multiplied each other obtains power, again the power integration is obtained the electric energy that the user consumes; C, digital, promptly the electric current, the waveform voltage signal that enter the user are sampled, calculate power by counting circuit, adding up obtains the electric energy that this user consumes.The above electric energy meter overwhelming majority all is single list structure form, and promptly a table is exactly a complete and independent electric energy meter, can only independently be installed as the usefulness that a user carries out the power consumption metering.

Along with domestic a large amount of multilayers and skyscraper sub-district are built up, there is how tame resident family in every building, has constituted multi-user in enormous quantities colony, if single list structure form electric energy meter is installed, tends to bring very burden to aspects such as installing, manage, keep in repair, check meter.In order to adapt to this demand, reported a kind of knockdown electric energy meter at present, it is to be installed in simply in the same casing by several single tables (independent, complete single electric energy meter) to constitute.Each single table is a complete and independent individuality, and each single table has oneself independently mlultiplying circuit, integrating circuit etc., and the contact between them only is to be installed in simply in the same casing.Its function singleness is a kind of simple assembly.

The purpose of this utility model provide a kind of by one-chip computer centralized management, control and focus on, measure respectively, each family power consumption shows, can realize multi-functional concentrating type electric energy metering machines such as remote control is checked meter, remote control is provided with multiple rate and pre-payment, and is anti-electricity-theft separately.

To achieve these goals, the utility model is to realize like this.Electric energy meter submeter housing box and circuit are partly.The watchcase case comprises cabinet door and the last nowel chamber that has mechanical register hole and Infrared window oral pore.The forceful electric power loop is connected across respectively between three-phase firewire and the ground wire by the input end of voltage sensor, it exports one of end of the same name ground connection, another end of the same name input end that signal switches programmed switch group and programmable amplifying circuit of respectively hanging oneself joins, one end of the input end of current sensor joins with three-phase firewire respectively, the other end is received on the terminal block seat through user's the programmed switch of rationing the power supply separately, wherein one export end ground connection of the same name, the other end switches the programmed switch group with signal separately and joins with the input end of programmable amplifier after joining again, the output of programmable amplifier and digital to analog converter A/D input end join, output terminal and the one-chip computer of A/D join, and one-chip computer joins with communication interface again and power supply joins.Write supervisory routine, control program, calculation procedure among the ROM of calculator chip in advance, and realize that under the support of said procedure unified management, control, calculating, note deposit demonstration, communication.

The utility model has the advantages that:

(1) adopts the one-chip computer intelligent management to make the present invention have centralized management, centralized control, measure multiple parameters such as (each user's electric current, voltage signal), intensive data processing acquisition active power, active energy, reactive energy, power factor, bill respectively, realize the function of a-table-multi-purpose.The simplification of this table one-piece construction, physical dimension are rationally tightly beaten.

(2) adopt isolated electric current, voltage sensor that whole electric energy metrical work and electrical network and user are all isolated fully, improved the reliability and the sense of security.

(3) be provided with communication interface, adopt the data communication method of concentrating, under the unified management of one-chip computer, can carry out remote control and check meter, be provided with at any time services such as multiple rate and pre-payment.

(4) have anti-stealing electricity function, and can realize the protection of rationing the power supply, the practicable outage measure of user's overload electricity consumption.

(5),, improved reliability owing to adopted the calculator chip memory and the mechanical register installed concentratedly is preserved simultaneously and shown to the unified management of each user's relevant datas such as power consumption.

(6) adopt power supply that each function of whole electric energy metrical work is partly carried out unified power supply, improve the antijamming capability of complete machine with anti-interference function.

The utility model will be further described in conjunction with the accompanying drawings:

Fig. 1. the locations of structures figure of present embodiment;

Fig. 2. the electric energy metrical workflow diagram;

Fig. 3. electrical network, each user and electric current, voltage sensor and signal sampling thereof, analog-to-digital conversion circuit figure;

Fig. 4. one-chip computer, communication interface, mechanical register circuit diagram;

Fig. 5. the centrally connected power supply power circuit;

Figure six. and integrated circuit goes out pin figure;

Watchcase casing 14 fronts are dodge gates, be provided with upper box 15 and 16 2 spaces of lower box that electromagnetic screen is divided in the casing, centrally connected power supply power supply 12 (wherein transformer 13 is installed in the nowel chamber 16) is installed in the upper box 15, communication interface 9, calculator chip 7, analog-to-digital conversion circuit 6, programmable amplifying circuit 5, signal switches programmed switch (K2) 4, Deng the light current parts, A phase firewire 19 is installed in nowel chamber 16, B phase firewire 20, C phase firewire 21, three voltage sensors 2,30 current sensors 1, power supply transformer 13, external power grid junction block 17, the program control protection switch group (K1) 3 of rationing the power supply of user, terminal block seat 18 parts such as forceful electric power such as grade; On cabinet door 27, have hole 24 and Infrared window oral pore 25 that each user's machinery register is installed, external power grid three-phase and four-line (or single-phase two-wire) is through bottom, nowel chamber entrance hole 22, be connected on the external power grid junction block 17, and respectively with A phase firewire 19, B phase firewire 20, C phase firewire 21 joins, two input ends of three voltage sensors 2 are connected across A respectively, B, between C three-phase and the ground wire G26, one of 1/3 user's of number of users isolated current sensor 1 input end terminates at A phase firewire 19, one of 1/3 user's isolated current sensor 1 input end is connected to B line live wire 20, one of 1/3 user's isolated current sensor 1 input end is connected to C phase firewire 21, the other end of all users' isolated current sensor 11 input ends connects only terminal block seat 35 through user's programmed switch (K2) 3 of rationing the power supply separately, (end is live wire A to provide two terminals by terminal block seat 35 to each user, B, the C phase, one end is ground wire G), to each user's power supply.Each user's electricity consumption situation is under the monitoring of one-chip computer 7, and when certain user's overload electricity consumption, one-chip computer 7 is in time rationed the power supply to the user and protected programmed switch (K1) 3 to send instruction, cuts off this user's power supply, works the effect of rationing the power supply.Resistance R of each cross-over connection 1, a capacitor C 1 between each current sensor 1 two output terminal, one of them end of the same name is ground connection all, another end of the same name switches programmed switch through signal separately concentrates the input end that connects to programmable amplifier 5, one end of the same name of three isolated sensor 2 outputs is ground connection all, another broken ends of fractured bone of the same name (K2) 4 that respectively hang oneself connects input end (end of R2) to programmable amplifier 5, connects each K2 respectively and enter programmable amplifier 5 under the unified management of one-chip computer 7 and control.Programmable amplifier 5 is by input resistance R2, K3 and amplifier A that feedback resistance R3 to R8 seals in a programmed switch group respectively form, programmed switch K3 is under the control of one-chip computer 7, each of connecting among the K3,1-128 is provided doubly (two multiplication benefits) eight grades of gains, guarantee signal through programmable amplifier 5 after all to enter digital to analog converter 6 (model AD1674) near 1/2 the changing voltage of changing range, through A/D converter under the management of one-chip computer 7, simulation system and digital display circuit are interrelated together, promptly become analog signal conversion digital signal to enter digital display circuit, one-chip computer 7 by CPU (8031 chip) through data register (74LS374), join with A/D converter 6; Join with ROM (27512), RAM 62256 respectively through data buffer (74LS246), address buffer (74LS245); Join through address bus AB and decoding scheme (74L138), under the management of CPU, switch programmed switch group 4, programmable amplifier 5 sending controling instructions to the program control switches set 3 of rationing the power supply of multi-user, signal respectively; Through the end by the control end R11-R40 of the carry driving circuit of G1-G30 and R11-R40 of optocoupler (521-4), code translator (74LS138) and mechanical register 8, the emitter grounding of G1-G30, collector connects to+12V power supply through separately propelling coil; CPU through own RXD mouth and infrared receiving chip (HC377) join, the TXD mouth of warp oneself is through 12 ends of modulator (74HC02), 2 ends and 8 end spaies meet crystal oscillator G33,13 termination R41, one end, the base stage of the infrared transmission pipe of its another termination G32, the emitter grounding of G32, collector connects+the 12V power supply through R42 diode G31.

Under the program that writes in advance in the ROM of one-chip computer 7 is supported, current and voltage signals to each user carries out unified management, control, processing, calculating, each user's who calculates at last power consumption parameter (active power, active energy, reactive power, power factor, bill etc.) storage and uniform among RAM; And press 1/100 kilowatt of each household to each user's mechanical digital register 8 and sent out a pulse in one hour, register is beated forward once, one-chip computer 7 is also managed control wireless (or infrared) communication interface 9, at any time prepare when receiving 10 instructions of external management personnel controller, rapidly one-chip computer 7 to be given in relevant instruction, one-chip computer 7 is pressed command request, carry out exchanges data with managerial personnel's controller 10 at once, the realization remote control is checked meter, preset multiple rate and prepaid services, on the basis of this function, can realize the computernetworking management very easily, implement to check meter, the robotization of management.The each several part electricity consumption of whole electric energy device is provided by centrally connected power supply power supply 12, provide ± 5V, + 12V, power supplys such as ± 15V, centrally connected power supply power supply 12 is by A, B, the C Three-phase electric-wave filter is connected across A respectively, B, between C three-phase and the ground wire G, filter capacity C2 and inductance L 1 are formed, A, B, the C three-phase supply connects elementary to transformer T separately through wave filter separately, 13 levels of three transformers connect respectively to rectifier bridge G34, G35, the ac input end of G36, its dc output end is through diode G37, G38, G39 charges to C3, by C3 to integrated (7915 of voltage stabilizing, 7815,7912,7812,7905,7805) provide power supply, provide power supply to whole device at last.Be characterized in providing electric network source simultaneously, when power supply breaks down outage,, metering process normally carried out as long as wherein any phase normal power supply can both guarantee the power supply of whole device by A, B, C three-phase; Electric network source enters and all passes through the reliability that the anti-interference filtration network of being made up of C2 and L1 further improves power supply.

Claims (2)

1. the civilian electric energy meter of concentrating type electronics partly is made up of watchcase case part and circuit, and the watchcase case comprises casing (14), dodge gate (24), top box chamber (15), nowel chamber (16) and cabinet door (27); Circuit part is included in the power supply (12) in the top box chamber (15), communication interface (9), one-chip computer (7), analog digital A/D change-over circuit (6), programmable amplifying circuit (5), signal switches programmed switch group (K2) (4), and A phase bus (19) is arranged in nowel chamber (16), B phase bus (20), C phase bus (21), three voltage sensors (2), 30 current sensors (1), power supply transformer (13), external power grid junction block (18), the program control limit switch group of user (K1) (3), terminal block seat (18), ground wire G (26) is characterized in that:

A. three voltage sensors (2) input end is connected across respectively between A, B, C three-phase bus (19) (20) (21) and the ground wire G (26), it exports one of end of the same name ground connection, and another end of the same name input end (R2) that signal switches programmed switch group (4) and programmable amplifying circuit (5) of respectively hanging oneself joins; Input end one end of a plurality of current sensors (1) respectively with A, B, C three-phase bus (19) (20) (21) joins, the other end is received on the terminal block seat (18) through user's the programmed switch group (2) of rationing the power supply separately, one of them exports all ground connection of end of the same name, another is exported, and end of the same name joins afterwards with signal switching programmed switch group (4) separately and the input end of programmable amplifier (5) joins, the output of programmable amplifier (5) and digital to analog converter A/D (6) join, the output of A/D (6) and one-chip computer (7) join, one-chip computer (7) joins with communication interface (9), also joins with (5) (6) (4) (2) respectively simultaneously; The output terminal of power supply (12) also joins with one-chip computer (7) when joining with (2) (4) (5) (6).

B. store management, control, the calculation procedure of complete machine among the ROM of one-chip computer (7); electric current, the voltage load that in RAM, also stores the multi-user limit the quantity of numerical value, and power consumption, power factor (PF), reactive energy, bill parameter; under program in being pre-stored in ROM is supported; realize complete machine unified management, control; and record shows with mechanical register and combines, and user's overload electricity consumption tripping protection.

C. adopt communication interface (9) and one-chip computer (7) to join, after accepting managerial personnel's instruction, carry out data communication with managerial personnel's controller (10), export each user power utilization data, the realization remote control is checked meter, can arbitrarily by instruction multiple rate and prepaid services be set.

D. casing (14) divides top box chamber (15) and nowel chamber (16), has the mounting hole of mechanical register (24) on cabinet door (27), and infrared communication hole (25) have entrance hole (22) and wire hole (23) at bottom half.

2. electric energy meter according to claim 1, it is characterized in that computernetworking management can pass through communication interface (9) again with net connection.

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