CN2042597U - Time-division watt-hour meter - Google Patents

Abstract

The utility model relates to a time-division watt-hour meter which is provided with three electromagnetic type watt-hour meters respectively measuring total power expenditure degree, peak hour power expenditure degree and valley hour power expenditure degree. A control system composed of integrated circuits switches off or switches on the peak according to preset time interval signals, and a voltage coil of the valley watt-hour meter makes a peak & valley watt-hour meter work according to the preset time interval. Because the interior structure of the traditional watt-hour meter is adopted and a weak signal sensing method is thrown off, the reliability of the utility model is improved greatly and the accuracy rate is guaranteed. Because the utility model has the functions of presetting the time interval and clearing a signal generator, the utility model has the advantage of flexible and convenient use. The time-division watt-hour meter is convenient for bulk production and serial manufacture.

Description

Time-division watt-hour meter

The utility model is relevant with power measuring instrument, and is especially relevant with the induction meter that has electronic control system.

Traditional electric energy measurement instrument that is used for time sharing meter, its principle of work adopt the power consumption information of directly gathering mostly from the rotation of total electric energy meter kilsyth basalt dish, form the pulse of respective numbers, section when predetermined peak or paddy.Remove to drive the step motor of walking several mechanisms accordingly respectively to these step-by-step countings, storage, or with these pulses, reach the purpose of time sharing meter, noncontact sample modes such as photoelectric sensing or electromagnetic oscillation are adopted in the collection of power consumption signal more.The measuring accuracy of peak, paddy period need design or examine degree of determination again, is subject to unfavorable factor influences such as electromagnetic interference (EMI), light source life because this kind gathered the mode of power consumption information, and reliability is relatively poor.And owing to destroyed the working method of traditional electrical kilsyth basalt, increased the additive error item, its precision is suffered damage.

The purpose of this utility model provides a kind of reliability height, and the period is provided with explanation degree height, and the period is provided with adjustable time sharing meter watt-hour meter arbitrarily.

Another purpose of the present utility model provides a kind ofly utilizes traditional electrical kilsyth basalt inner structure, thereby the accuracy class of metering is guaranteed, and adapts to the time sharing meter watt-hour meter of the transformation of original electric energy metered system.

It is to make the peak that is provided with and revises electricity consumption that the utility model also has a purpose, and paddy is convenient during the period, flexible, not only can measure the peak, paddy period power consumption accumulated value, and can measure total power consumption.When grid cut-off, can not cause metering the losing of numerical value, misdescription, the peak of need not resetting, paddy period.

Power consumption, total power consumption when the utility model measures peak, paddy respectively by the electromagnetic type watt-hour meter of three series connection, period signal cut that the control system basis of being made up of integrated circuit presets or the potential winding of connecting peak, paddy watt-hour meter, make peak, paddy ammeter by the period work of presetting, measure the power consumption accumulated value of peak value period and valley period respectively.Control system is free/address signal generator, and it produces a standard frequency by a quartz crystal, divides through output behind the frequency divider frequency division, 10 minutes, hour, 10 hours signal is shown by display.Simultaneously with 10 minutes, hour, 10 hours binary-coded decimal output is as the address signal of memory.Peak, paddy period data memory can arbitrarily carry out " reading " operation and " writing " operation.Peak, the paddy control gate period signal cut that output is preset according to memory or connect peak, paddy watt-hour meter, the time segment signal can not be high level simultaneously.There is initialize switch to be provided with and to revise peak, paddy period as required, standby power supply arranged after grid cut-off, the peak that assurance is preset, segment data can not lost during paddy control.

Time/address signal generator is made up of U1, U2, U3, U4, U5.U1 is ten level Four two-dividers, the standard frequency that quartz oscillator is produced is transformed to the 0.5S signal, U2 can be double D trigger, making two-divider uses, the 0.5S signal is become the 1S signal, and U3, U4, U5 are up counter, divide exporting respectively behind the input signal frequency division, very, hour, ten hours signals, show the time for display, U4, as address signal, Sheffer stroke gate U8 control U7 carries out read or write to the U5 output signal for peak/paddy period data memory static RAM (SRAM) U7, U10 is the two-way digital switch that simulates, and is used to remove the time segment signal of storage in the U7.The peak valley control gate is by U9, T2T3 forms, U9 is a double D trigger, in the period of presetting, when the D2 of memory U7 (or D4) end is high level, triode T3(or T2) conducting, relay J 2(or J1) adhesive, the potential winding of watt-hour meter during paddy when peak (or watt-hour meter) is connected, and begins degree of counting.

Display has seven sections locking code translators of U11-U14, shows for light-emitting diode display after being translated into seven segment code after the binary-coded decimal time signal of U4, U5 is latched.Period initialize switch K6, the fast accent, slowly transfer microswitch K5, K4 makes clock run to the peak of appointment or the paddy period is initial or stop the moment, have the peak rise/peak ends, paddy rises/paddy ends K switch 1, K2 makes the U7 memory be in " writing " state or " reading " state, one electromagnetism watt-hour meter and peak arranged, paddy watt-hour meter serial connection metering total power consumption.

The utility model does not change traditional electrical kilsyth basalt inner structure, amount to kilsyth basalt and all can adopt the watch core that meets State Standard of the People's Republic of China GB3924-83 " exchanging meritorious and wattless component watt-hour meter " requirement, thereby the accuracy class of metering is guaranteed with the time sharing meter table.When taking the watch core of variety classes or different accuracy grade, electronic control system of the present utility model and its combination also can have function corresponding and corresponding precision, form series of products easily.Total degree of the present utility model and time sharing meter table are divided into two independent parts, and the time sharing meter table both can be used as the extender that amounts to kilsyth basalt and inserted, to adapt to the transformation of original electric energy metered system; Also can make up, be adapted to new user's installation with new total kilsyth basalt.The utility model time zone signal is directly controlled the heavy-current control method of respective electrical kilsyth basalt winding, avoided traditional light current mode, the photo-electric collection power consumption electromagnetic interference (EMI) that information was vulnerable to, unfavorable factors such as light source life is short, thereby has higher reliability, the utility model decapacitation does not have outside the total consuming electric power of the ground of omission metering, can also accurately measure the accumulated value of the time subregion in-fighting of any appointment with electric flux, adopt the way of the corresponding storage of period one control data, " total clear " is set, " the fast accent ", " transfer " mechanism slowly, make electric administrative department be easy to according to this area electricity consumption situation, be provided with and revise the peak of electricity consumption, the paddy period, needn't weld the control straight line again.The utility model is after the power supply grid outage, can automatically clock be shown, power consumption major parts such as control gate break from control circuit, with standby power supply power consumption less clock and the data memory of peak/paddy period are continued power supply, guarantee after the outage, the peak that presets, paddy control section data can not lost, and after the power system restoration power supply, standby power supply withdraws from power supply automatically.The utility model possesses substantive distinguishing features and obvious improvement.

Fig. 1 is a block scheme of the present utility model

Fig. 2 be time/the address signal generator schematic diagram

Fig. 3 is displaying principle figure

Fig. 4 is a CD4511 integrated package schematic diagram

Fig. 5 is time/address memory, and system is put device, zero clearing device, peak, paddy control gate schematic diagram.

Fig. 6 is a power circuit diagram

Fig. 7 is peak, paddy meter kilsyth basalt control principle figure

Fig. 8 is three-phase and four-line physical cabling figure of the present utility model.

Following is embodiment of the present utility model:

The timesharing watt-hour meter is by peak period watt-hour meter 1, and paddy period watt-hour meter 2 is formed.Two watt-hour meter are connected with the total degree watt-hour meter 3 in the former use, form the meritorious time sharing meter table of three-phase and four-line, can degree of total, and meter degree during the peak, Gu Shiji degree.Three watt-hour meter all adopt traditional inner structure, thereby guarantee original measuring accuracy.

Time/the address signal generator of control system of the present utility model is by U1, U2, and U3, U4, U5 forms.U1 is 14 bit serial digit counter CD4060, and the standard frequency that quartz (controlled) oscillator 12 is produced is transformed to the 0.5S signal.C1, C2, R1, R2 are the quartz oscillation tank capacitance, resistance.U2 is double D trigger CD4013, makes two divided-frequency usefulness in circuit, and the 0.5S signal becomes the 1S signal.U3, U4, U5 are two 2-10 and advance synchronous counter CD4518.U6 be 4 * 2 with the door.The sub-signal of the Q end output of U2, send into U4, behind ÷ 60 circuit that 1/4 U6 forms, be output as a hour signal, send into U5 again, ÷ 24 circuit that 1/4 U6 forms carry out a hour counting, with this clock count chain minute, ten minutes, hour, after the binary-coded decimal of 10 hours parts is deciphered, can show for display.Meanwhile, 10 minutes, hour, 10 hours output is corresponding with data memory U7 input.Supply U7 as address signal.T1 is a display driver, and R3, R4 are current-limiting resistance, and R ' 4 is a via resistance.

Peak/paddy period data memory is by U7, U8, and U10 forms, U7 is a static RAM (SRAM) 2114, and the read-write operation of segment signal when carrying out, U8 are Sheffer stroke gate CD4011, control U7 carries out read or write, and U10 is the two-way digital switch CD4066 that simulates, and is used to remove the time segment signal of storage in the U7.

U9 is 1/2 74LS74 latch, paragraph controller when forming the peak with driver T2, and the D end of U9 links with the D4 end of U7, when D4 was high level, the Q of U9 end was output as high level, T2 conducting, make relay J 2 adhesives, the voltage winding of showing during with the peak is connected, and makes its meter degree.

The control section of Gu Shiji degree is by U10(1/2 74LS74) and driver TT3 form, U10 receives the D2 end of U7, the step-down of D2 level, whether the meter degree of meter kilsyth basalt to be when having determined paddy.R9, R10, R11, R12 are current-limiting resistance.

The level of D2 and D4 can not be high simultaneously, but can be low simultaneously, when D4 and D2 simultaneously when low, peak, paddy are counted all degree of disregarding of kilsyth basalt.But amount to still degree of counting of kilsyth basalt.

It is fixed that the D4 of read/write memory and the level of D2 can be put as required in advance, and it is as described below that the giving of D4 put:

To move/adjust K switch 6 and put the adjustment position, and pull " the fast accent " or " transferring slowly " microswitch K5, K4 makes clock run to peak period in the initial moment of appointment.The peak is risen/peak ends K switch 1 and pulls to " rising " position.At this moment+5V voltage is added to the D4 position through R5, and makes U8 be in standby condition.When B U8 and U4 held the input end that links to each other to be high level, U8 was an output low level, made the R/ W end of U7 be low level, and U7 is in " writing " state, the high level of D4 end " is write " gone into corresponding units.(making this unit deposit data 1000 in) continues to press K5, K4, and then pairing all unit all write data 1000 the peak period.Stop constantly when clock runs to the peak period, K1 is pulled to " peak ends " position, D4 is through R5 ground connection, and the other end input end of U8 is through R6 ground connection, and the R/ W of U7 end no longer writes data for high, finishes presetting of peak period.After, if when clock reruns in this period, because K1 is in " ending " position, U7 promptly can export the data 1000 that preset for " reading state ", removes to control 1/2 U9 and J1, shows the meter degree when J2 makes the peak.

Presetting of D2 is similar to the above, just K2 pulled to " paddy rises ", and " paddy is ended " position, by 1/2 U9 and T3, table meter degree during J2 control paddy.The data that preset in the section during paddy are 0010.

When reinitializing peak (paddy) during segment data, the data of the original storage of reply U7 are removed, removing is by U10(cmos switch CD4066) finish, press microswitch K3, make the R/ W of U7, D4, D2 is all through U10 ground connection, and the signal of the Q4 of CP4060 output is added to the input end of U4, counting chain high-speed carry through K6, and whole element addresses of traversal RAM, thereby being stored content whole unit removing, RAM2114 is " 0 ".R5, R6, R7, R8 are build-out resistor, C3, C4 are anti-interference capacitor.

The display part is by U11, U12, and U13, U14 and light-emitting diode display are formed, and U11-U14 is seven sections locking code translator CD4511, with U4, shows that for light-emitting diode display resistance R is a current-limiting resistance after being translated into seven segment code after the binary-coded decimal time signal of U5 latchs.

Power circuit is by rectifier, and voltage stabilizer, wave filter is formed, 220 volts alternating currents are exported direct current through voltage stabilizer U5 through two-way bridge rectifier D 5-D8 and D9-D12, the U16(model is NEC7805) and filtering after provide+5V stable DC voltage.One the tunnel for memory 2114 and clock crystal oscillator power supply, and another road is made for display and other device power source, by rectification output end directly take out+12V is made for actuating of relay coil power.C5, C6, C7 are filter capacitor, and D13 is a switching diode, when guaranteeing electric network power-fail, the work of clock and memory is not interrupted, and is connected to every nickel-based battery BATT at memory power supply branch road, when electric network power-fail, battery inserts automatically, and maintenance work is continuous.

Control system of the present utility model inserts the peak, the potential winding of paddy meter kilsyth basalt.L1-L3 is time meter kilsyth basalt three-phase voltage winding for the peak, and L4-L6 is meter kilsyth basalt three-phase voltage winding during for paddy.R13-R18, C8-C13 are the crowbar circuit resistance capacitance.

Claims (2)

1, timesharing watt-hour meter, it is characterized in that by total degree watt-hour meter meter degree watt-hour meter during the peak, Gu Shiji degree watt-hour meter are serially connected with between electrical network input and the load, the potential winding of meter degree watt-hour meter, Gu Shiji degree watt-hour meter links to each other with control system respectively during the peak, control system is by clock/address signal generator, peak/paddy period data memory, clock display, peak or Gu Shiji degree control gate, the period preset device, the clear signal generator, standby power supply is formed.

2, timesharing watt-hour meter according to claim 1 proposes is characterized in that time/address signal generator by quartz oscillator, and frequency divider and up counter are formed, peak/paddy period data memory is by RAN, Sheffer stroke gate, the bidirectional analog digital switch is formed, during the peak, Gu Shiji degree control gate is by double D trigger, driver, relay is formed, and clock display is made up of seven sections locking code translators and light-emitting diode display, the period preset device comprises the period initialize switch, the fast accent transferred microswitch slowly, and the peak rises/and the peak ends, paddy rises/and paddy ends switch, clear signal distribution device comprises the Cmos switch, microswitch, and power circuit is by rectifier, voltage stabilizer, wave filter is formed.

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