CN2240151Y

CN2240151Y - Electric energy meter capable of paying in advance

Info

Publication number: CN2240151Y
Application number: CN 95215727
Authority: CN
Inventors: 关伯奋
Original assignee: Individual
Current assignee: Individual
Priority date: 1995-06-29
Filing date: 1995-06-29
Publication date: 1996-11-13
Anticipated expiration: 2005-06-29

Abstract

The utility model relates to an electric energy meter capable of paying in advance. On the basis of a base structure and an electromagnetic mechanical counting machine core of a traditional electric energy meter, a microcomputer processing system and a cover casing with the function of prepayment metering control is additionally arranged at the utility model. The microcomputer processing system is composed of a voltage-stabilizing power supply circuit, a photoimpact sampling circuit, a voltage discrimination circuit, a clock generating circuit, an outside card read-write interface, a control drive return circuit, an LED numeric display system, a CPU central control line and an internal memory return circuit. The utility model has the characteristics of simple structure, economy, practicality, high reliability, etc. By adopting the utility model, the reform of the traditional electric energy meter is simple and feasible with cost saving.

Description

A kind of novel prepayment meter

The utility model belongs to a kind of instrument of measuring electric flux, particularly a kind of prepayment meter.

Prepayment meter is in the last few years along with " " is that just coming out appears in this notion of commodity.The back electricity consumption function of paying dues earlier of prepayment meter not only provides the management approach of plan power supply to power supply department, but also has saved manual metering person's labour intensity, stops the electricity arrears phenomenon and takes place.In addition from technical standpoint, it is a much progress very with respect to traditional mechanical type ammeter.But at present mostly domestic prepayment meter is to occur with novel complete machine form, and this is folded down old table for continuing to use the old user of traditional electrical kilsyth basalt for many years, new prepayment meter is installed is undoubtedly a kind of heavy financial burden.And abandon old table or fix a price for that to handle old table also be a kind of worthless wasting phenomenon, old user is difficult for accepting.If but traditional mechanical formula watt-hour meter is transformed into intelligent prepaid electric energy meter again, and the engineering difficulty is big, the electric energy meter multi-size of former more single DD type series, and size differs, and modification scheme is difficult for unified, brings difficulty to engineering construction.

The utility model purpose is to provide a kind of can overcome above-mentioned mechanical electric energy meter weak point, it does not change existing machinery electric energy meter structure, has the novel pre-expense electric energy meter of pre-payment electric energy table function again.It is economic, practical, has very big popularizing value.

According to the utility model purpose, the solution that the designer proposes is: the mechanical count movement and the base that utilize the traditional electrical kilsyth basalt, and set up the case that microprocessor system with prepayment metering control function and bottom are the stepwise convex, make the electric energy meter of formation become intelligent prepayment meter.Compared with prior art, the utility model is simple in structure, and is economic, practical, reliability is high.Simultaneously, old-fashioned watt-hour meter transformation is had the saving cost, simple benefit helps promoteing the wider application.

Further describe the utility model below by drawings and Examples.

Fig. 1 is the utility model structure partial cut-open view.

Fig. 2 is the utility model microprocessor system circuit theory diagrams.

Fig. 3 is the utility model principle of work block diagram.

Shown in accompanying drawing 1, the utility model rotates aluminium dish 12 by calutron 11, electromagnetic and mechanical counting movement 1 and base 3 that gear 13, counter 14 are formed, and by voltage-stabilized power supply circuit 21, photoimpact sample circuit 22, voltage judging circuit 23, clock generation circuit 24, wild card read-write interface 25, controlling and driving loop 26, LED digital display system 27, CPU central control line 28, the microprocessor system 2 that internal memory loop 29 components and parts such as grade are formed, case 3 is formed.Microprocessor system 2 is arranged on the lower position of above-mentioned electromagnetic and mechanical counting movement 1, and its circuit board is packed in the shell bottom position of case 4.Case 4 be provided with electricity card jack 41 corresponding to wild card read-write interface 25 places, case 4 bottoms are the convex structure, in order to deposit electronic devices and components and circuit, case 4 covers on the base 3 of above-mentioned electromagnetic and mechanical counting movement 1 by thread.

Fig. 2 is the microprocessor system circuit theory diagrams.Find out that from diagram power transformer BT is 13V with civil power 220V alternation, again through silicon stack D ₃-D ₆Become DC10V after the bridge type rectification, for controlling and driving loop 26 electricity consumptions; DC10V after the rectification is through wave filter C ₅Filtering becomes DC5V through 7805 regulator block ZD voltage stabilizings again, for 22 electricity consumptions of photoelectricity sampling pulse circuit; Simultaneously with the interface P of master chip IC ₁, P ₂Connect, for CPU central control line 28 electricity consumptions and chip IC ₁Interface P ₈Connect, for internal memory loop 29 electricity consumptions.Photoelectricity sampling pulse circuit 22 is by two photoelectric probe W ₁, W ₂Form.Probe W ₁, W ₂The non-contact optoelectronic sensing mode is adopted in rotation aluminium dish 12 belows that are installed in electromagnetic and mechanical counting movement 1, and aluminium dish revolution moves gets a signal week, and obtained signal send CPU to carry out logic counting, logical operation, logic discrimination processing.This circuit adopts the dipulse counting, the artificial impulse disturbances that causes to prevent factor such as temporary interruption and other light source.Photoelectricity sampling pulse loop 22 and master chip IC interface P ₁₀-P ₁₁Connect.Voltage judging circuit 23 and master chip IC interface P ₁₂Connect, drop to 0.1V when reading mouthful voltage _oThe time, CPU will count umber of pulse to internal memory and write interior card.Controlling and driving loop 26 and master chip IC interface P ₂₅Connect,, drive the relay J action or be failure to actuate execution power supply and power failure function by triode D by setting this mouthful set and " 0 ".Clock generation circuit 24 is mainly by a crystal oscillator LCR and capacitor C ₃, C ₄Form.This circuit and master chip IC interface P ₂₆, P ₂₇Connect, produce the 4MHz clock signal.LED digital display system 27 adopts the 4-digit number display, in order to represent electricity card input charge value and ammeter accumulative total residual electric quantity.This system and master chip IC interface P ₁₄-P ₁₇Connect for the dynamic bit turntable driving, with P ₁₈-P ₂₄Connecting is the dynamic segment turntable driving, by setting delivery outlet set and " 0 ", can show this position section " bright " or " not working ".Internal memory loop 29 is by the 93LC46 chip IC ₁Interface P ₁＇, P ₂＇, and P ₃＇, P ₄＇ respectively with master chip IC interface P ₇, P ₉And P ₈Connect, finish reliable read-write capability.Wild card read-write interface 25 is by wild card 93LC46 chip IC ₂Interface P ₃", P ₄", P ₅" P ₆", P ₇" respectively with master chip IC interface P ₆, P ₉, P ₈, P ₁₃-P ₁₂Connect, that finishes numeral reads and writes process.CPU central control line 28 is made up of the PIG16G57 chip IC.Each interface by it connects with above-mentioned each circuit, whole design functions of intact cost table.

Shown in Figure 3 is the utility model electric energy meter principle of work block diagram.After this figure showed that this table inserts tested subscriber's line, the rotation aluminium dish 12 of the electromagnetic and mechanical counting movement 1 in the table rotated, and drove electric energy counter 14 record electricity consumption accumulating values, by photoelectric probe W ₁, W ₂Sampling produces corresponding electric energy metrical pulse signal, sends into CPU control center, through shaping, differentiate, and counting, the instruction according to wild card in advance gives carry out computing, thereby controlling and driving shows and control circuit work.

After the user installs and fixes the access of this table during use with electric line, to insert the electricity card jack on the casing from the electricity card (electric lock spoon) that electricity-selling system is bought back, by the electric weight input system, and the connecting subscribers participating current supply circuit, this electric energy meter promptly can show accumulative total residual electric quantity in electric charge value that blocks and the electric energy meter.When electric weight adds up dump energy less than certain setting value, this table digital indicator will flash with the prompting user always should remove to buy electric weight, otherwise ammeter will cut off user's current supply circuit automatically, hold once more up to the user and to buy electric weight and to be inserted with charge value electricity card, reclose current supply circuit, user's electricity consumption again.This machine has been pointed out a practical approach for the intelligent electric energy meter that the traditional mechanical electric energy meter is transformed into pre-payment, welcome by relevant department and user.

Claims

1, a kind of novel prepayment meter is by calutron (11), rotation aluminium dish (12), gear (13), electromagnetic and mechanical counting movement (1) and base (3) that counter (14) is formed, it is characterized in that it also comprises by voltage-stabilized power supply circuit (21), photoimpact sample circuit (22), voltage judging circuit (23), clock generation circuit (24), wild card read-write interface (25), controlling and driving loop (26), LED digital display system (27), CPU central control line (28), the microprocessor system (2) that internal memory loop components and parts such as (29) are formed, case (4) is formed, microprocessor system (2) is arranged on the lower position of above-mentioned electromagnetic and mechanical counting movement (1), its circuit board is packed in the shell bottom position of case (4), locate to be provided with electricity card jack (41) at case (4) corresponding to wild card read-write interface (25), case (4) bottom is the convex structure, in order to deposit electronic devices and components and circuit, case (4) covers on the base (3) of above-mentioned electromagnetic and mechanical counting movement (1) by thread.

2, prepayment meter according to claim 1 is characterized in that above-mentioned CPU central control line (28) is made up of the PIG16G57 chip IC, voltage-stabilized power supply circuit (21) and master chip IC interface P ₁, P ₂Connect the photoelectric probe W in photoelectricity sampling pulse loop (22) ₁, W ₂Be installed in rotation aluminium dish (12) below of electromagnetic and mechanical counting movement (1), photoelectricity sampling pulse loop (22) and master chip IC interface P ₁₀, P ₁₁Connect power supply judging circuit (23) and master chip IC interface P ₁₂Connect controlling and driving loop (26) and master chip IC interface P ₂₅Connect clock generation circuit (24) and master chip IC interface P ₂₆, P ₂₇Connect LED digital display system (27) and master chip IC interface P ₁₄-P ₂₄Connect, internal memory loop (29) are by the 93LC46 chip IC ₁Form it and master chip IC interface P ₇, P ₈, P ₉Connect, wild card read-write interface (25) is by the 93LC46 chip IC ₂Form it and master chip IC interface P ₆, P ₈, P ₉, P ₁₂, P ₁₃Connect.