CN2195760Y - Prepayment electronic electric energy meter - Google Patents
Prepayment electronic electric energy meter Download PDFInfo
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- CN2195760Y CN2195760Y CN 94202814 CN94202814U CN2195760Y CN 2195760 Y CN2195760 Y CN 2195760Y CN 94202814 CN94202814 CN 94202814 CN 94202814 U CN94202814 U CN 94202814U CN 2195760 Y CN2195760 Y CN 2195760Y
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Abstract
The utility model discloses a prepayment electronic electric energy meter, comprising a meter casing, a meter core circuit and an outside card 6. The meter core circuit is composed of a sampling unit, an analog-digital conversion unit, a data processing unit, and a display unit which are connected in series successively, a drive unit controlled by the data processing unit, a calendar clock which provides calendar and time for the data processing unit, and a backup battery unit, wherein, the data processing unit is composed of a main processor 1 and a secondary processor 2, the sampling unit is composed of a voltage sensor PT, the amplifier of the voltage sensor PT, a current sensor CT and the amplifier of the current sensor CT, and the outside card 6 is a non-volatile memory. The utility model has the advantage of high measuring accuracy and has the functions of computerization, automatic meter reading, and prepayment power rate of the management of power use.
Description
The utility model relates to a kind of electronic electric energy meter, belongs to field of computer technology.
Electric energy meter is developed to the full electronic direction by mechanical type, electronic type at present.The principle of work of electronic electric energy meter in the past mostly is to send analog multiplier with voltage, current signal from the power supply collection, and the signal to analog multiplier output carries out the V/F conversion again, and the result with conversion removes driving device counter or light-emitting diode display then.Its shortcoming is that precision is low, adjustment is difficult, can not satisfy the requirement of the modern management of power use.
The purpose of this utility model is the electronic electric energy meter that a kind of precision height of design, adjustment are easy, can satisfy modern management of power use requirement.
The purpose of this utility model realizes like this: electronic electric energy meter for prepayment comprises watchcase, watch core circuit and wild card.Said watch core circuit is made up of all unit of sampling, analog to digital conversion, data processing, demonstration, driving, direct supply, calendar clock and backup battery.Wherein:
---data processing unit is made up of primary processor and auxiliary processor, and the IOP10 of said primary processor～IOP15 pin connects PC3, the PB0～PB4 pin of auxiliary processor respectively;
---AD conversion unit is made of analog to digital converter, and its digital signal output pin connects the data pin of said primary processor, and its interruption, startup pin connect the IOP2 and the IOP1 pin of said primary processor respectively;
---sampling unit is made up of voltage sensor and amplifier, current sensor and amplifier thereof, and the output of above-mentioned amplifier connects the simulating signal input pin of said analog to digital converter;
---display unit is made of display, and its data pin and voltage pin connect the FP0～FP31 pin and the BP0～BP3 pin of said auxiliary processor respectively;
---driver element is made up of triode and the relay that is connected on the output terminal of this triode, and the input of this triode connects the PC4 pin of said auxiliary processor;
---calendar clock and backup battery unit are made up of calendar clock chip and battery, PA3～PA6 the pin and the battery of the I/O of calendar clock chip, DATA, CLK, CE, the said auxiliary processor of VDD pin tap, the XT1 of calendar clock chip and the indirect crystal oscillator of XT2 pin.
Said wild card is a kind of nonvolatile memory, and its DO, DI, CLK, CS and interruption pin are connected to PC0～PC2, PA1 and the PC7 pin of said auxiliary processor respectively.
Below in conjunction with embodiment the utility model is described in detail.
Fig. 1 is an outside drawing of the present utility model;
Fig. 2 is watch core circuit theory diagrams of the present utility model.
The utility model is made up of watchcase shown in Figure 1, watch core circuit and wild card 6 shown in Figure 2.The watch core circuit is made up of direct supply (not drawing among the figure), sampling, analog to digital conversion, data processing, demonstration, driving, internal memory, power monitoring, calendar clock and all unit of backup battery and button 11.Wherein:
---data processing unit is made up of primary processor 1 and auxiliary processor 2, PC3, the PB0～PB4 pin of the IOP10 of primary processor 1～IOP15 pin tap auxiliary processor 2;
---AD conversion unit is made of analog to digital converter 3, and its digital quantity signal output pin PB0～PB11 meets the data pin D0～D11 of primary processor 1, and its interruption pin INT, startup pin CONVST connect the IOP2 and the IOP1 pin of primary processor 1 respectively;
---sampling unit is made up of the voltage sensor PT of two transformer forms and amplifier thereof, two Hall current sensor CT and amplifier thereof, the former limit of two transformers meets the line voltage U AB and the UBC of subscriber's line circuit respectively, the line current IA and the IC of two Hall current sensor difference perception subscriber's line circuits, the output of above-mentioned amplifier meets the analog signals input pin VIN1～VIN4 of analog to digital converter 3 respectively;
---display unit is made of LCD 4, and its data pin FP0～FP31 and voltage pin BP0～BP3 connect the FP0～FP31 and the BP0～BP3 pin of auxiliary processor 2 respectively;
---driver element is made up of triode and the relay J that is connected on this transistor collector output terminal, and the base stage of this triode connects the PC4 pin of auxiliary processor 2 through a resistance;
---calendar clock and backup battery unit are made up of calendar clock chip 5 and battery E, the I/O of calendar clock chip 5, DATA, CLK, CE, VDD pin meet the PA3～PA6 pin and the battery E of auxiliary processor 2 respectively, connect crystal oscillator between the XT1 of calendar clock chip and the XT2 pin;
---internal storage location is by nonvolatile memory E
2PROM7～9 are formed, the DO of storer 7, DI, CLK, CS pin connect the PC0～PC2 and the PA2 pin of auxiliary processor 2 respectively, the DO of storer 8, DI, CLK, CS pin connect the PC0～PC2 and the PA0 pin of auxiliary processor 2 respectively, the IOP3～IOP6 pin of the DO of storer 9, DI, CLK, CS pin tap primary processor 1;
--the power monitoring unit is made up of operation monitoring chip (being commonly called as house dog) 10 and triode, the base stage of this triode connects the IOP0 and the RESET pin of primary processor 1 respectively through resistance and backward dioded, the collector output of this triode meets the resetting pin MR of operation monitoring chip 10, and the output pin RST of operation monitoring chip 10 meets the resetting pin RESET of auxiliary processor 2;
--an end ground connection of three buttons 11, the other end that is connected to pull-up resistor connects the PB5 of auxiliary processor 2～PB7 pin respectively.
In addition, also have in the watch core circuit code translator 12, with door 13, standard RS-232 interface 14 and socket communication 15.Wherein: the A3 of primary processor 1～A11 pin connects the input end with door 13, be connected to the Enable Pin E1 of code translator 12 with the output of door 13, the A0 of primary processor 1～A2 pin and enable three input signal pin and the Enable Pin E2 that pin REN connects code translator 12 respectively, the output terminal of code translator 12 is connected to the chip select pin CS of analog to digital converter 3 and reads pin RD, the RXD pin of primary processor 1 and TXD pin connect the R2O and the T2I pin of standard RS-232 interface 14 respectively, the PC6 pin of auxiliary processor 2 and PA7 pin meet the R1O and the T1I pin of standard RS-232 interface, the R1I of standard RS-232 interface 14 respectively, R2I, T1O, the all pin of T2O are connected to socket communication 15.
The transformer of the direct supply of this electric energy meter is with the subscriber's line circuit parallel connection, in case subscriber's line circuit is connected, this direct supply is just started working, and power supply is provided for each chip.Operation monitoring chip 10 monitors direct supply voltage, when direct supply voltage is raised to 4.6V when above, primary processor 1 electrification reset, its IOP0 human hair combing waste goes out signal, make the triode conducting of joining with this pin, give negative pulse of MR pin of operation monitoring chip 10 during the triode conducting, operation monitoring chip 10 is resetted, so the RST pin of operation monitoring chip is given 2 reset pulses of auxiliary processor, the data of preserving in storer 7～9 and the calendar clock chip 5 are read in auxiliary processor 2 initialization immediately, self check, major and minor processor.
After this, voltage sensor PT and current sensor CT gather user's voltage and current signal, and these simulating signals are delivered to the analog quantity input end VIN1～VIN4 of analog to digital converter 3 respectively after amplifier amplification separately.Analog to digital converter 3 ceaselessly carries out digitizing to these voltages, current analog signal in turn with the sample rate of 920us, and the result is outputed to the primary processor 1 from its PB mouth.The voltage that primary processor 1 is gathered according to analog to digital converter 3, the transient data of electric current carry out mathematics manipulation, deliver to auxiliary processor 2 by its IOP10～IOP15 pin after calculating instantaneous energy value and accumulative total energy value, remain available power with this instantaneous energy value simultaneously and calculate.2 relevant data liquor charging crystal displays such as time 4 energy value of receiving and taking-up from calendar clock chip 5 of auxiliary processor show.If certain control data transfinites, as owe the electricity charge, then auxiliary processor goes out control signal by its PC4EVI human hair combing waste relay J is connected, and is removed to drive user's switch trip or is driven sound and light alarm by relay J.
In case operation monitoring chip 10 records the outage of user's alternating circuit, operation monitoring chip 10 makes auxiliary processor reset at once, auxiliary processor is again by its PC3TCA pin notice primary processor, so major and minor processor is sent to preservation in the nonvolatile memory 7～9 to electric energy and management information immediately, changes the backup battery power supply subsequently automatically over to.Be power saving, backup battery E only is calendar clock chip 5 power supplies.
When new clothes electric energy meter or electricity consumption data need be revised, the user held wild card 6 and goes to electric industry management department to purchase electricity, and the sale of electricity machine of electric industry management department writes wild card purchasing electric quantity data.The user is as long as insert wild card socket on the electric energy meter to this once with the wild card of purchasing electric quantity data, switch on the wild card socket will be switched on, the wild card socket is coupled on the interrupt request line of PC7IR1 pin of auxiliary processor 2 presents low level, promptly send interrupt request to auxiliary processor, so just reading in the data in the wild card in the storer 7, preserves auxiliary processor, and the power consumption data of last month are write in the wild card, so that read by electric industry management department when purchasing electricity once more.Data are by software cryptography in this exchange process, are not forged guaranteeing.
Three buttons 11 are used for switching the information that electric energy meter shows.Socket communication 15 can be used for realizing the wired networking with the computing machine of electricity management department.Code translator 12, be used for the addresses control of 1 pair of analog to digital converter 3 of primary processor with door 13.
The utility model has following advantage:
Owing to be based on computer technology, and load voltage, electric current that sensor obtains handled respectively, and then carry out electric energy metrical, thereby available software is calculated the dispersiveness that overcomes components and parts such as additional phase shift that voltage sensor and current sensor produce and linear amplifier between the two, make the ammeter cost because of circuit reduces, makes that to the components and parts requirement electric energy meter adjustment is easy, measuring accuracy improves, have the function that a table can calculate multiple electric quantity data.Test result shows that the precision of this table on average can improve 1～2 grade.
Owing to adopted operation monitoring chip and backup battery, thereby electric energy meter can be automatically restored in the normal procedure move, the reliability of electric energy meter is improved greatly, reached the requirement of long-time running under rugged surroundings when being interfered or crash.
Owing in the table socket communication and wild card are arranged, therefore it has the function of management of power use computerize, automatic data logging and prepayment electric expense, this reclaims the time in transit, improves the use of funds benefit, reduces electric power enterprise running cost, alleviation electric power enterprise and users' contradiction with electric control, the shortening electricity charge raising management of power use means, reinforcement, and realization guarantees that the target of resident living power utility is significant under the situation of electric power supply relative deficiency.It can satisfy the requirement of the modern management of power use.
Present embodiment is a three-phase electric energy meter, if its voltage sensor and current sensor are used instead single-phase, then can constitute single-phase electric energy meter.
Claims (2)
1, electronic electric energy meter for prepayment comprises watchcase, watch core circuit and wild card (6), it is characterized in that said watch core circuit is made up of all unit of sampling, analog to digital conversion, data processing, demonstration, driving, direct supply, calendar clock and backup battery, wherein:
--data processing unit is made up of primary processor (1) and auxiliary processor (2), and the IOP10 of primary processor (1)～IOP15 pin connects PC3, the PB0～PB4 pin of auxiliary processor (2) respectively;
--AD conversion unit is made of analog to digital converter (3), and its digital signal output pin connects the data pin of said primary processor (1), and its interruption, startup pin connect the IOP2 and the IOP1 pin of primary processor (1) respectively;
--sampling unit is made up of voltage sensor PT and amplifier, current sensor CT and amplifier thereof, and the output of above-mentioned amplifier connects the simulating signal input pin of said analog to digital converter (3);
--display unit is made of display (4), and its data pin and voltage pin connect the FP0～FP31 pin and the BP0～BP3 pin of said auxiliary processor (2) respectively;
--driver element is made up of triode and the relay J that is connected on the output terminal of this triode, and the input of this triode connects the PC4 pin of said auxiliary processor (2);
--calendar clock and backup battery unit are made up of calendar clock chip (5) and battery E, PA3～PA6 the pin and the battery E of I/O, the DATA of calendar clock chip (5), CLK, CE, the said auxiliary processor of VDD pin tap (2), the XT1 of calendar clock chip (5) and the indirect crystal oscillator of XT2 pin;
Said wild card (6) is a kind of nonvolatile memory, and its DO, DI, CLK, CS and interruption pin are connected to PC0～PC2, PA1 and the PC7 pin of said auxiliary processor (2) respectively.
2, electronic electric energy meter for prepayment according to claim 1 is characterized in that also having in the said watch core circuit button (11) and internal memory, power monitoring Unit two, wherein:
---internal storage location is made up of nonvolatile memory (7)～(9), PC0～the PC2 of DO, the DI of nonvolatile memory (7), CLK, the said auxiliary processor of CS pin tap (2) and PA2 pin, PC0～the PC2 of DO, the DI of nonvolatile memory (8), CLK, the said auxiliary processor of CS pin tap (2) and PA0 pin, the IOP3～IOP6 pin of DO, the DI of nonvolatile memory (9), CLK, the said primary processor of CS pin tap (1);
---the power monitoring unit is made up of operation monitoring chip (10) and triode, the input of this triode connects the IOP0 and the RESET pin of said primary processor (1), the output of this triode meets the resetting pin MR of operation monitoring chip (10), and the output pin RST of operation monitoring chip (10) connects the resetting pin of said auxiliary processor (2);
---an end ground connection of three buttons (11), the other end connect the PB5～PB7 pin of said auxiliary processor (2) respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 94202814 CN2195760Y (en) | 1994-02-17 | 1994-02-17 | Prepayment electronic electric energy meter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 94202814 CN2195760Y (en) | 1994-02-17 | 1994-02-17 | Prepayment electronic electric energy meter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2195760Y true CN2195760Y (en) | 1995-04-26 |
Family
ID=33822485
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 94202814 Expired - Fee Related CN2195760Y (en) | 1994-02-17 | 1994-02-17 | Prepayment electronic electric energy meter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2195760Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103810793A (en) * | 2014-01-22 | 2014-05-21 | 广东浩迪创新科技有限公司 | Intelligent power purchase management system and power purchase method thereof |
-
1994
- 1994-02-17 CN CN 94202814 patent/CN2195760Y/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103810793A (en) * | 2014-01-22 | 2014-05-21 | 广东浩迪创新科技有限公司 | Intelligent power purchase management system and power purchase method thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C53 | Correction of patent for invention or patent application | ||
| COR | Change of bibliographic data |
Free format text: CORRECT: PATENTEE; FROM: YONGSHENG INTERNATIONAL ENGINEERING CO. LTD. HUNAN PROV. TO: HUNAN WEISHENG ELECTRONICS CO.,LTD. |
|
| CP03 | Change of name, title or address |
Address after: 410013 hi tech Industrial Development Zone, Hexi Tongzi slope, Changsha Patentee after: Weisheng Electronic Co., Ltd., Hunan Address before: 410007, 39, Zi Lu Road, Changsha Patentee before: Yongsheng International Engineering Co. Ltd. Hunan Prov. |
|
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |