CN101339682B - CPU card three phase electronic type pre-payment step electricity price electrical energy meter - Google Patents
CPU card three phase electronic type pre-payment step electricity price electrical energy meter Download PDFInfo
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Abstract
A CPU card single/three-phase electronic prepayment stepwise electricity price and electric energy meter comprises an interface unit, a power circuit unit, an electric energy metering and an electric parameter detection unit, an electric meter power cut-off mechanism and an MCU control unit; the interface unit, the power circuit unit, and the electric energy metering and the electric parameter detection unit are respectively input to the MCU control unit; the MCU control unit outputs the power cut-off information to the electric meter power cut-off mechanism; the power circuit unit simultaneously supplies power to the electric energy metering and electric parameter detection unit; the electric energy meter further comprises a display unit, an ESAM unit and an alarm unit; the ESAM unit is connected between the interface unit and the MCU control unit; and the display unit and the alarm unit are activated by the control information output by the MCU control unit. The electric energy meter of the invention adopts the stepwise electricity price, and gives different electricity prices based on the monthly power consumption of the users, which facilitates a power supply bureau to flexibly select the policy of encouraging or restricting power utilization.
Description
Technical field
The present invention relates to a kind of electric energy meter, specifically relating to a kind of is the electric energy meter of the automatic control electricity consumption metering and the electricity consumption clearing of message exchange medium with the CPU card.
Background technology
Along with the fast development of electronic technology, large scale integrated circuit is widely used in electric energy meter.Traditional induction type electric energy meter needs the staff to check meter to the doorstep or power on/off, the calculating electricity charge, the mailing electricity charge are single etc., and delay in payment and bad credit problem can appear, particularly in the customer group of power supply enterprise, power consumption is bigger, the electricity charge amount of dealing with is also bigger, its electricity charge of recovery in time are emphasis and the difficult points during power supply enterprise manages, and the different time period of very difficult implementation is adopted different electricity consumption regulation measures such as rate.
And electronic electric energy meter is compared with induction type electric energy meter, has the measuring accuracy height, and overload capacity is strong, and power consumption is low, and is stable and reliable for performance, and volume is little, and is in light weight, easy and simple to handle, is easy to realize the characteristics such as expansion, a-table-multi-purpose of management function.The full electronic multifunctional electric energy meter adopts the high-precision measuring chip, finishes the precision of various electrical quantitys and calculates and measure, and can realize copying and accepting automatically and bank's networking, settling accounts the technology of the electricity charge automatically of user power utilization amount.
Existing prepayment meter in the prior art, but rate is generally more fixing, perhaps stipulates multiple rate, thus need certain storage space.Less for the demonstration of information in addition, lack prompting function and emergency function that insufficient in amount etc. occurs, bring some inconvenience therefore for user's use.
Summary of the invention
The objective of the invention is to propose the CPU card three phase electronic type pre-payment step electricity price electrical energy meter of a species stage electricity price, can give different electricity prices, play the purpose of encouraging electricity consumption or brownout every month size according to the user power utilization amount.
For achieving the above object, the invention provides a kind of CPU card three phase electronic type pre-payment step electricity price electrical energy meter, this electric energy meter comprises interface unit, power circuit unit, electric energy metrical and electrical parameters detection unit, ammeter power cutoff mechanism, MCU control module, described interface unit, power circuit unit and electric energy metrical and electrical parameters detection unit input to the MCU control module respectively, MCU control module output power cut-off information is to the ammeter power cutoff mechanism, and described power circuit unit provides power supply for electric energy metrical and electrical parameters detection unit simultaneously; Wherein, this electric energy meter also comprises the display unit that connects described display control module (104), be connected ESAM unit and the alarm unit that is connected described alarm control module between interface unit and the communication module (100), described ESAM unit is connected between interface unit and the MCU control module, described display unit and alarm unit activate by the control information of MCU control module output, described MCU control module comprises communication module, clock module, the power measurement module, memory module, display control module, rate computing module and alarm control module, wherein, described communication module, clock module and power measurement module all input to display control module and memory module respectively with each self-information, described memory module output is connected to rate computing module and display control module, the one output terminal output power cut-off information of described rate computing module, two output terminals are distinguished control modules taking alarm and display control module in addition, described alarm control module one output termination display control module, another output terminal output alarm information, described display control module output display control information, described MCU control module is used for starting working after the success of dress electricity, from memory module, read rate information from communication module, temporal information from clock module, electric power information from the power measurement module, activate the current rate kind in the some rates of electric energy meter, activate under the current kind of rate rate in current time zone in some time zones, with N step electric weight E1 to EN of electric energy meter setting adjacent in twos be divided into N+1 interval, be respectively: [0, E1), [E1, E2) up to [EN, + ∞], each interval corresponding ladder electricity price P0 to PN, wherein, N is a natural number, judge the interval that of that month current power consumption is affiliated, carry out the electricity price of this interval correspondence in the part in affiliated interval, described each interval electricity price sum obtains the required electricity charge of of that month current electricity consumption, deduct these electricity charge and obtain remaining the electricity charge, after calculating the residue electricity charge, if residue electricity charge abundance, then operate as normal; When remaining sum was lower than the pre-alarm thresholding of setting, then rate computing module output remaining sum pre-alarm information made the alarm unit that links to each other with alarm control module send warning to alarm control module; When remaining sum was lower than the alarm threshold of setting, then rate computing module output remaining sum warning message made alarm unit send warning to alarm control module, exports power cut-off information simultaneously to the ammeter power cutoff mechanism, and the output display message is to display control module.
The N of described setting step electric weight E1 to EN all satisfies more than or equal to zero and ascending power arrangement; The N+1 of described setting ladder electricity price P0 to PN+1 be series arrangement by size.
Described MCU control module also comprises an overdraw processing module, described overdraw processing module is connected between described rate computing module and the ammeter power cutoff mechanism, described communication module input overdraw amount of money thresholding and overdraw rate are to described overdraw processing module, when the residue electricity charge are decremented to zero in the ammeter, the overdraw amount of money thresholding of electricity consumption of can overdrawing to described setting.
Described MCU control module also comprises buys the electricity consumption processing module on dredit, be connected between described rate computing module (105) and the ammeter power cutoff mechanism, described communication module input is bought amount of money thresholding on dredit and is bought rate on dredit to the described electricity consumption processing module of buying on dredit, when described electric energy meter insufficient in amount, can buy electricity consumption on dredit to buying amount of money thresholding on dredit.
Described MCU control module also comprises buys the electricity consumption processing module on dredit, be connected between described overdraw processing module and the ammeter power cutoff mechanism, described communication module input is bought amount of money thresholding on dredit and is bought rate on dredit to the described electricity consumption processing module of buying on dredit, when described electric energy meter insufficient in amount, can buy electricity consumption on dredit to buying amount of money thresholding on dredit.
Described MCU control module also comprises a load control module, the output terminal of an input termination power measurement module of described load control module, and another input end is connected the customer charge thresholding of news module output; One output terminal control module taking alarm, the second output termination ammeter power cutoff mechanism, the 3rd output termination display control module, the course of work of described load control module is:
Whether judge current need for electricity amount and current power all greater than the customer charge thresholding, if not, then electric energy meter continues operate as normal;
If then send power cut-off information, judge that whether overload outage number of times allows number of times greater than maximum, if be not more than the maximum number of times that allows, then exports overload pre-alarm information to alarm control module, overload outage number of times adds up, and the user can be by button or plug-in card restore electricity voluntarily; Otherwise export overload power alarm information to alarm control module, and must just can restore electricity by sale of electricity department, wherein, the maximum number of times that allows of overload outage can be by the interface unit setting.
Adopt the CPU card three phase electronic type pre-payment step electricity price electrical energy meter of described electric energy meter structure, comprise the lead sealing of loam cake plastics, loam cake lead sealing screw, loam cake, warning indication, pulse indication, toll bar, CPU card and CPU card slot, wheel shows button, loam cake lead sealing screw, the plumbous system of loam cake lead sealing, connector socket, wiring end cap lead sealing screw, wiring end cap, button, binding post gib screw, binding post, pulse test output, infrared communication interface, LCD, panel and drain pan is set.
The display items of described LCD comprises reveal codes, ladder rate kind sign, unit, the indication of remaining sum bar rod, data presentation item, communications identification and reverse electricity consumption sign.
The CPU card comprises subscriber card and test card in described CPU card and the CPU card slot, and described two kinds of cards all can insert in this CPU card slot, and wherein, described subscriber card uses for the user, and described test card offers power supply department and realizes checking meter or changing table.
Beneficial effect of the present invention is: described electric energy meter has adopted the ladder electricity price, can give different electricity prices according to the size of every month power consumption of user, in the basic electricity weight range, use an electricity price, the power consumption that exceeds the basic electricity amount uses another electricity price, therefore make things convenient for power supply administration to select to encourage electricity consumption or brownout policy flexibly, and need not save storage space by a large amount of electricity price data of different period storages.In addition, when ammeter detects overload or remaining sum deficiency and needs outage, all can send sound and light alarm; Can also be provided with simultaneously and give user certain overload number of times, facility extent and buy amount on dredit, prevent that sudden power from making troubles to user job life and lose, this electric energy meter also provides clock and watch to show and realtime power shows real-time burden functional, makes things convenient for the inquiry of user and power supply enterprise.
Description of drawings
Fig. 1 is the one-piece construction block diagram of the described electric energy meter of the specific embodiment of the invention;
Fig. 2 is the process flow diagram that calculates the residual electricity expense in the described MCU control module of the specific embodiment of the invention;
Ladder electricity price synoptic diagram when Fig. 3 is the described ammeter realization of specific embodiment of the invention using electricity wisely policy;
Ladder electricity price synoptic diagram when Fig. 4 is the described ammeter realization of specific embodiment of the invention encouragement electricity consumption policy;
Fig. 5 is a kind of electric energy meter product that the present invention adopts the described electric energy meter structure of the specific embodiment of the invention to produce;
Fig. 6 (a) is that the binding post of the described electric energy meter product of the specific embodiment of the invention indicates;
Fig. 6 (b) is the wiring diagram of the described electric energy meter product of the specific embodiment of the invention.
Embodiment
Below in conjunction with accompanying drawing, the specific embodiment of the invention is explained in detail.
Fig. 1 is the one-piece construction block diagram of the described electric energy meter of the specific embodiment of the invention, this electric energy meter comprises interface unit, ESAM unit, power circuit unit, electric energy metrical and electrical parameters detection unit, display unit, ammeter power cutoff mechanism, alarm unit and MCU control module, and wherein the MCU control module comprises communication module 100, clock module 101, power measurement module 102, memory module 103, display control module 104, rate computing module 105 and alarm control module 106.
Wherein, described power circuit unit comprises external power supply and RTC real time clock circuit, described external power supply provides power supply for clock module 101, electric energy metrical and the electrical parameters detection unit of MCU control module, described RTC real time clock circuit provides standby power supply for clock module 101, make when external power supply cuts off the power supply, clock internal module 101 still keeps duty.
Described interface unit comprises infrared interface and CPU card.In this specific embodiment, described CPU cassette tape cipher controlled, and adopt the 3-DES algorithm, have more compatibility.When inserting the CPU card to interface unit, the ESAM unit carries out the key authentication process, if authentication is not by then refusing dress, if whether authentication is anti-ly hoarded, is purchased Denso electricity number of times and mate by then detecting, if do not match then refusal dress electricity, if coupling then enters the dress electric process, with the information in the CPU card, comprise that purchasing the electric amount of money inputs to communication module 100, the relevant parameter value in the adjustment form with other parameter;
During when function comprises the programming school when function when described interface unit also can be realized the school, described school and broadcasting school, the authority restriction is arranged when wherein programming the school, can comprise diurnal on days Hour Minute Second with the real-time clock school to any time; Broadcasting when every day can only the school during school once, and the alignment time should clock of power meter ± 5 minutes within, otherwise electric energy meter is not when accepting this time broadcasting school.And electric energy meter time on date before and after when number of times and nearest 5 times school can write down total school time the after the success when the school, comprise time-division diurnal on days.
Described communication module 100, clock module 101 and power measurement module 102 all input to each self-information storage in the memory module 103, wait for that rate computing module 105 therefrom reads out the calculating of carrying out the electricity charge, thereby obtain remaining sum, when remaining sum is lower than the pre-alarm thresholding of setting, then rate computing module 105 output remaining sum pre-alarm information make the alarm unit that links to each other with alarm control module 106 send warning to alarm control module 106; When remaining sum was lower than the alarm threshold of setting, then rate computing module 105 output remaining sum warning messages made alarm unit send warning to alarm control module 106, export power cut-off information simultaneously to the ammeter power cutoff mechanism.Described alarm unit comprises voice-control alarm and two kinds of circuit of light control alarm, according to the corresponding startup of the control information of alarm control module 106.
Described communication module 100, clock module 101, power measurement module 102, memory module 103, rate computing module 105, alarm control module 106 input to display control module 104 respectively, control the corresponding information that display unit shows each module by display control module 104 according to showing from driving wheel with the apparent mode that combines of button wheel.
Figure 2 shows that the process flow diagram that calculates the residual electricity expense in the described MCU control module, each module of inside of MCU control module is as shown in Figure 1 worked as follows:
Step S200: after the success of dress electricity, ammeter is started working;
Step S201: from memory module 103, read rate information, from the temporal information of clock module 101, from the electric power information of power measurement module 102 from communication module 100;
Step S202: activate current rate kind, electric energy meter of the present invention can be stored multiple rate, in this specific embodiment, is example to have stored 4 kinds of rates, then activates the rate kind of current setting;
Step S203: activate the rate in current time zone under the current kind of rate, electric energy meter of the present invention can be divided into N time zone with 1 year, and wherein N is the natural number that is not more than 1 year T.T. number, in this specific embodiment, is example to be divided into four kinds of time zones;
Step S204: whether judge of that month current power consumption less than step electric weight E1, if, then enter step S205, if not, then redirect enters step S206;
Step S205: carry out electricity price P0, calculate the residue electricity charge, promptly calculate the required electricity charge of electricity consumption according to electricity price P0;
Step S206: whether judge of that month current power consumption again less than step electric weight E2, if then enter step S207, if not, then redirect enters step S208;
Step S207: carry out electricity price P1 and P0, calculate the residue electricity charge, promptly calculate less than the required electricity charge of step electric weight E1 part electricity consumption, calculate the required electricity charge of power consumption that surpass step electric weight E1 according to electricity price P1, thereby the electricity charge sum that deducts described two intervals obtains remaining the electricity charge according to electricity price P0;
Step S208: judge that of that month current power consumption whether less than step electric weight E3, if then redirect enters step S210, if not, then enters step S209;
Step S209: carry out electricity price P3, P2, P1, P0, promptly calculate less than the required electricity charge of step electric weight E1 part electricity consumption according to electricity price P0, according to the required electricity charge of power consumption between electricity price P1 calculating step electric weight E1 and the E2, according to the required electricity charge of power consumption between electricity price P2 calculating step electric weight E2 and the E3, calculate the required electricity charge of power consumption that surpass step electric weight E3 according to electricity price P3, the electricity charge sum in described four intervals is the required electricity charge of current electricity consumption, obtains remaining the electricity charge thereby deduct these electricity charge;
Step S210: carry out electricity price P2, P1, P0, promptly calculate less than the required electricity charge of step electric weight E1 part electricity consumption according to electricity price P0, according to the required electricity charge of power consumption between electricity price P1 calculating step electric weight E1 and the E2, calculate the required electricity charge of power consumption that surpass step electric weight E2 according to electricity price P2, the electricity charge sum in described three intervals is the required electricity charge of current electricity consumption; Deduct these electricity charge and can obtain remaining the electricity charge;
It should be noted that step electric weight of the present invention is not limited to three kinds of the described E1 to E3 of this embodiment, can be set to the N kind, in this embodiment with E1 to E
NExpression, then corresponding ladder electricity price is the N+1 kind, with P0 to P
NExpression, wherein N is a natural number, and the user can take all factors into consideration storage space and set the step number, and then the workflow of MCU control module is by above steps in sequence recursion.
Wherein the step electric weight should satisfy: 0≤E1≤E2≤E3≤...≤E
N, N step electric weight E1 to E being provided with of electric energy meter then
NAdjacent in twos with electric weight be divided into N+1 interval, be respectively: [0, E1), [E1 is E2) up to [E
N,+∞], each interval corresponding electricity price is followed successively by P0 to P
N, if of that month current power consumption is then carried out the electricity price of this interval correspondence in the part in which interval.Wherein, ladder electricity price P0 to P
NCan satisfy ascending order power and arrange, then this ladder electricity price plays the purpose of its brownout, as shown in Figure 3; If described N+1 electricity price P0 to P
NDescending sort successively, then this ladder electricity price plays the purpose of encouraging electricity consumption, as shown in Figure 4.Therefore power supply administration can be provided with different ladder electricity prices by the CPU card, thereby can ration the power supply or encourage electricity consumption flexibly, and can control the degree of brownout and encouragement electricity consumption flexibly, and owing to only needs access step electric weight E1 to E
NWith ladder electricity price P0 to P
N, can save storage space by the step number that reduces electric weight.
Rate through described step is calculated, can obtain the remaining electricity charge behind the of that month current power consumption, if residue electricity charge abundance, then described electric energy meter keeps operate as normal, if described residue electricity charge deficiency, then described rate computing module 105 is understood the output alarm information to alarm control module 106, and exports power cut-off information to the ammeter power cutoff mechanism after the time that continues one section setting, exports display message simultaneously to display control module 104.As if sudden power this moment, may cause certain loss to the user, enterprise customer particularly, electric energy meter of the present invention also comprises an overdraw processing module, described overdraw processing module is connected between rate computing module 105 and the ammeter power cutoff mechanism, and communication module 100 input overdraw amount of money thresholdings and overdraw rate are to described overdraw processing module, the electric weight that produces after the residue electricity charge are zero is the overdraw electric weight, calculate the overdraw electricity charge according to described overdraw rate, the user can overdraw electricity consumption to described overdraw amount of money thresholding.
The described electric energy meter of the specific embodiment of the invention also comprises buys the electricity consumption processing module on dredit, be connected between described overdraw processing module and the described ammeter power cutoff mechanism, equally, communication module 100 inputs are bought amount of money thresholding on dredit and are bought rate on dredit to the described electricity consumption processing module of buying on dredit, when the electricity charge that can overdraw reach the electric weight that produces behind the overdraw amount of money thresholding for buying electric weight on dredit, calculate and to buy the electricity charge on dredit according to the described rate of buying on dredit, the user can buy electricity consumption on dredit to the described amount of money thresholding of buying on dredit.
Described overdraw processing module and buy the electricity consumption processing module on dredit and can not comprise simultaneously, if when not comprising the overdraw processing module, the then described electricity consumption processing module of buying on dredit is connected between rate computing module 105 and the ammeter power cutoff mechanism, directly activates the described electricity consumption processing module of buying on dredit after the residue electricity charge are zero.
The described electric energy meter of the specific embodiment of the invention also can comprise a load control module, the output terminal of an input termination power measurement module 102 of described load control module, and another input end is connected the customer charge thresholding of news module 100 outputs; One output terminal control module 106, the second output termination ammeter power cutoff mechanism taking alarm, the 3rd output termination display control module 104 shows overload information.
Whether the principle of work of described load control module judges current demand and current power all greater than the customer charge thresholding for by the power load of a load thresholding limited subscriber is set, and if not, then electric energy meter continues operate as normal;
If then send power cut-off information, judge whether overload outage number of times allows number of times greater than maximum, if be not more than the maximum number of times that allows, then starts the overload pre-alarm, and overload outage number of times adds up, and the user can be by button or plug-in card restore electricity voluntarily; Otherwise start the overload power alarm, and must just can restore electricity by sale of electricity department, wherein, the maximum number of times that allows of overload outage can be by the interface unit setting.
Be illustrated in figure 5 as the electric energy meter product that adopts the described electric energy meter structure of the specific embodiment of the invention, this electric energy meter comprises loam cake plastics lead sealing 1, loam cake lead sealing screw 2, loam cake 3, the indication 4 of reporting to the police, pulse indication 5, toll bar 6, CPU card and CPU card slot 7, and wheel shows button 8, loam cake lead sealing screw 9, the plumbous system of loam cake lead sealing 10, connector socket 11, wiring end cap lead sealing screw 12, wiring end cap 13, button 14, binding post gib screw 15, binding post 16, pulse test output 17, infrared communication interface 18, LCD 19, panel 20 and drain pan 21 are set.
The display items of described LCD 19 comprises reveal codes, ladder rate kind sign, unit, the indication of remaining sum bar rod, data presentation item, communications identification and reverse electricity consumption sign, wherein, in this embodiment, data item such as described data presentation item displaying contents comprises the electricity consumption data, parameter is set, historical data, time, current realtime power, the parameter that relates in the electric energy meter all can show by this data item, and adopt 2 decimals of 6 integers to show in this embodiment; Described reveal codes adopts historical electricity consumption data of 2 bit flag data representations and ammeter that parameter is set; Described ladder rate kind sign is indicated with T1, T2, T3 and T4.
In this embodiment, described each stick of remaining sum bar rod indication is represented the remaining sum of 10 monetary units, has 9 sticks.When remaining sum during more than or equal to 90 monetary units, the bar rod is complete to be shown; During less than 90 monetary units, show 8 sticks more than or equal to 80 monetary units; By that analogy, when remaining sum during less than 10 monetary units, the bar rod does not show.
It should be noted that, described data presentation item is not limited to 2 decimal modes of described 6 integers of this embodiment, described reveal codes also is not limited to the described 2 bit flag data of this embodiment, because it is 71 that the present invention needs items displayed, as long as other satisfy, and the reveal codes figure place that enough identifies display items display all belongs to protection scope of the present invention; Described ladder rate kind sign also is not limited to four kinds of indications of the described T1 to T4 of this embodiment, belongs to protection scope of the present invention as long as other can distinguish the ladder rate kind number average that electric energy meter stores; The indication of described remaining sum bar rod also is not limited to described 9 sticks of this embodiment, and it showing that the mode of remaining sum amount all belongs to the scope of protection of the invention, as long as other can know.
Described LCD 19 also is not limited to described demonstration item number of this embodiment and display mode, as long as other the apparent and apparent display mode that combines of button wheel from driving wheel that can meet consumers' demand all belongs to invention which is intended to be protected.
The described button 14 that is provided with is for being provided with or the zero clearing button; Described have four binding posts accordingly with binding post 16; shown in Fig. 6 (a); be respectively: phase line inserts, phase line picks out, center line inserts and center line output; its wiring relation is shown in Fig. 6 (b); the specific embodiment of the invention adopts the 5KV isolation voltage, is output as the 50V DC voltage; maximum current is that 5. the optocoupler of 50mA is exported as electrical energy pulse and 8., shown in the frame of broken lines, this optocoupler does not possess external power source and protective capability.Even the insulation that can bear 5KV between optocoupler output and other loop of electric energy meter is therefore breakdown function of measuring and other control function that can not influence electric energy meter of the optocoupler output terminal of electric energy meter inside; Connect a coil auxiliary detection power consumption parameter between phase line and the center line.
When outage condition satisfies, when electric energy meter disconnects power load, if the user externally turnover line of short circuit electric energy meter shown in Fig. 6 (a) carries out stealing, electric energy meter can detect this electricity filching behavior, after this behavior duration surpasses 1 minute, shows on the liquid crystal display that stealing indicates, when if electricity filching behavior continues more than 1 minute again, the number of times that electric energy meter will take place by the stealings of memory module 103 record and total stealing time, wherein in this embodiment, the time is minute to measure.
Wherein, described CPU draw-in groove 7 insertable CPU cards comprise subscriber card and test card, and wherein subscriber card offers the user and opens an account, purchases electricity and the operation of dress electricity; Test card is checked meter to electric energy meter for power supply department or parameter is set, power supply department also can utilize the 14 pairs of electric energy meters of button that are provided with on test card and the table to change table handling, no matter change to or swap out operation, button 14 is set on all must according to the form below, the concrete table handling step of changing is as follows:
When button 14 being set and inserting test card on the according to the form below, if table is the state of opening an account, the operation that swaps out of the data of then carrying out electric energy meter; If table is the state of not opening an account, then carry out the change operation of electric energy meter data.
When execution electric energy meter data swapped out operation, the data file that swaps out in the test card was necessary for empty file, should not have new electricity filching behavior to take place after checking meter last time in the electric energy meter simultaneously, otherwise electric energy meter will not carried out swap out operation and reporting errors; Operation completes successfully if swap out, and then electric energy meter cuts off power supply, enters and changes table status, the dump energy bar rod flicker on the liquid crystal display.
When carrying out the change operation of electric energy meter data, the data file that swaps out in the test card must effectively and change to data file and be necessary for empty file, otherwise electric energy meter will not carried out change operation and reporting errors; If change operation completes successfully, then electric energy meter cuts off power supply, enters and changes to table status, at this moment should insert subscriber card or test card again, makes to change to table and upgrade electric energy meter parameter is set, and withdraws to change to table status and enter the state of opening an account, and beginning is operation normally.
Wherein, every test card can only carry out swap out change operation each once, change and must take sale of electricity department behind the table and allow electricity-selling system change the table job accounting to file and empty swapping out on the card/change to data file, just can change table handling afterwards next time.
Above content be in conjunction with concrete preferred implementation to further describing that the present invention did, can not assert that concrete enforcement of the present invention is confined to these explanations.For the general technical staff of the technical field of the invention, without departing from the inventive concept of the premise, can also make some simple deduction or replace, all should be considered as belonging to protection scope of the present invention.
Claims (9)
1.CPU card three phase electronic type pre-payment step electricity price electrical energy meter, this electric energy meter comprises interface unit, power circuit unit, electric energy metrical and electrical parameters detection unit, ammeter power cutoff mechanism, MCU control module, described interface unit, power circuit unit and electric energy metrical and electrical parameters detection unit input to the MCU control module respectively, and described power circuit unit provides power supply for electric energy metrical and electrical parameters detection unit simultaneously; It is characterized in that, described MCU control module comprises communication module (100), clock module (101), power measurement module (102), memory module (103), display control module (104), rate computing module (105) and alarm control module (106), this electric energy meter also comprises the display unit that connects described display control module (104), be connected ESAM unit and the alarm unit that is connected described alarm control module between interface unit and the communication module (100), described ESAM unit is connected between interface unit and the communication module (100), wherein, described communication module (100), clock module (101) and power measurement module (102) all input to each self-information respectively display control module (104) and memory module (103), described memory module (103) output is connected to rate computing module (105) and display control module (104), the one output terminal output power cut-off information of described rate computing module (105) is to the ammeter power cutoff mechanism, two output terminals are distinguished control modules taking alarm (106) and display control module (104) in addition, described alarm control module (106) one output termination display control modules (104), another output terminal output alarm information, described display control module (104) output display control information, described MCU control module is used for starting working after the success of dress electricity, from memory module (103), read rate information from communication module (100), temporal information from clock module (101), electric power information from power measurement module (102), activate the current rate kind in the some rates of electric energy meter, activate under the current kind of rate rate in current time zone in some time zones, N the step electric weight E1 to E that electric energy meter is provided with
NAdjacent in twos be divided into N+1 interval, be respectively: [0, E1), [E1 is E2) up to [E
N,+∞], each interval corresponding ladder electricity price P0 to P
NWherein, N is a natural number, judge the interval under the of that month current power consumption, carry out the electricity price of this interval correspondence in the part in affiliated interval, described each interval electricity price sum obtains the required electricity charge of of that month current electricity consumption, deduct these electricity charge and obtain remaining the electricity charge, after calculating the residue electricity charge, if residue electricity charge abundance, then operate as normal; When remaining sum was lower than the pre-alarm thresholding of setting, then rate computing module (105) output remaining sum pre-alarm information made the alarm unit that links to each other with alarm control module (106) send warning to alarm control module (106); When remaining sum is lower than the alarm threshold of setting, then rate computing module (105) output remaining sum warning message is to alarm control module (106), make alarm unit send warning, export power cut-off information simultaneously to the ammeter power cutoff mechanism, the output display message is to display control module (104).
2. CPU card three phase electronic type pre-payment step electricity price electrical energy meter according to claim 1 is characterized in that, the N of described setting step electric weight E1 to E
NAll satisfy more than or equal to zero and ascending power and arrange; The N+1 of described setting ladder electricity price P0 to P
N+1Series arrangement by size.
3. CPU card three phase electronic type pre-payment step electricity price electrical energy meter according to claim 1, it is characterized in that, described MCU control module also comprises an overdraw processing module, described overdraw processing module is connected between described rate computing module (105) and the ammeter power cutoff mechanism, described communication module (100) input overdraw amount of money thresholding and overdraw rate are to described overdraw processing module, when the residue electricity charge are decremented to zero in the ammeter, the overdraw amount of money thresholding of electricity consumption of can overdrawing to described setting.
4. CPU card three phase electronic type pre-payment step electricity price electrical energy meter according to claim 1, it is characterized in that, described MCU control module also comprises buys the electricity consumption processing module on dredit, be connected between described rate computing module (105) and the ammeter power cutoff mechanism, described communication module (100) input is bought amount of money thresholding on dredit and is bought rate on dredit to the described electricity consumption processing module of buying on dredit, when described electric energy meter insufficient in amount, can buy electricity consumption on dredit to buying amount of money thresholding on dredit.
5. CPU card three phase electronic type pre-payment step electricity price electrical energy meter according to claim 3, it is characterized in that, described MCU control module also comprises buys the electricity consumption processing module on dredit, be connected between described overdraw processing module and the ammeter power cutoff mechanism, described communication module (100) input is bought amount of money thresholding on dredit and is bought rate on dredit to the described electricity consumption processing module of buying on dredit, when described electric energy meter insufficient in amount, can buy electricity consumption on dredit to buying amount of money thresholding on dredit.
6. CPU card three phase electronic type pre-payment step electricity price electrical energy meter according to claim 1, it is characterized in that, described MCU control module also comprises a load control module, the output terminal of one input termination power measurement module (102) of described load control module, another input end is connected the customer charge thresholding of news modules (100) output; One output terminal control module taking alarm (106), the second output termination ammeter power cutoff mechanism, the 3rd output termination display control module (104), the course of work of described load control module is:
Whether judge current need for electricity amount and current power all greater than the customer charge thresholding, if not, then electric energy meter continues operate as normal;
If then send power cut-off information, judge that whether overload outage number of times allows number of times greater than maximum, if be not more than the maximum number of times that allows, then exports overload pre-alarm information to alarm control module (106), overload outage number of times adds up, and the user can be by button or plug-in card restore electricity voluntarily; Otherwise export overload power alarm information to alarm control module (106), and must just can restore electricity by sale of electricity department, wherein, the maximum number of times that allows of overload outage can be by the interface unit setting.
7. adopt the described CPU card three phase electronic type pre-payment step electricity price electrical energy meter of claim 1, it is characterized in that, this electric energy meter comprises loam cake plastics lead sealing (1), loam cake lead sealing screw (2), loam cake (3), report to the police and indicate (4), pulse indication (5), toll bar (6), CPU card and CPU card slot (7), wheel shows button (8), loam cake lead sealing screw (9), the lead sealing (10) of the plumbous system of loam cake, connector socket (11), wiring end cap lead sealing screw (12), wiring end cap (13), button (14) is set, binding post gib screw (15), binding post (16), pulse test output (17), infrared communication interface (18), LCD (19), panel (20) and drain pan (21).
8. CPU card three phase electronic type pre-payment step electricity price electrical energy meter according to claim 7, it is characterized in that the display items of described LCD (19) comprises reveal codes, ladder rate kind sign, unit, the indication of remaining sum bar rod, data presentation item, communications identification and reverse electricity consumption sign.
9. CPU card three phase electronic type pre-payment step electricity price electrical energy meter according to claim 8, it is characterized in that, the CPU card comprises subscriber card and test card in described CPU card and the CPU card slot (7), described two kinds of cards all can insert in this CPU card slot, wherein, described subscriber card uses for the user, and described test card offers power supply department and realizes checking meter or changing table.
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| CN2008101425906A CN101339682B (en) | 2008-07-29 | 2008-07-29 | CPU card three phase electronic type pre-payment step electricity price electrical energy meter |
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| CN2008101425906A CN101339682B (en) | 2008-07-29 | 2008-07-29 | CPU card three phase electronic type pre-payment step electricity price electrical energy meter |
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| CN101339682B true CN101339682B (en) | 2010-08-25 |
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| CN106952412B (en) * | 2017-03-22 | 2019-11-08 | 福州东日信息技术有限公司 | A kind of control method of emergency water |
| CN109470289B (en) * | 2018-09-18 | 2021-11-05 | 中国电力科学研究院有限公司 | Method and system for identifying energy flow value reverse event for metering equipment |
| CN109509306B (en) * | 2018-09-30 | 2021-03-09 | 宁波三星智能电气有限公司 | Method for calculating remaining use days of prepaid electric meter |
| CN110531131A (en) * | 2019-08-27 | 2019-12-03 | 上海畅洲电气有限公司 | Multi-rate electric energy meter and its working method |
| CN110940948A (en) * | 2019-11-22 | 2020-03-31 | 广东电力交易中心有限责任公司 | Method, device and equipment for calculating settlement deviation generated by ammeter clock drift |
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| CN201259703Y (en) * | 2008-07-29 | 2009-06-17 | 深圳市思达仪表有限公司 | CPU card three phase electronic type pre-payment step electricity price electrical energy meter |
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