CN208752124U - It is a kind of to take control intelligent electric energy meter - Google Patents
It is a kind of to take control intelligent electric energy meter Download PDFInfo
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- CN208752124U CN208752124U CN201820896606.1U CN201820896606U CN208752124U CN 208752124 U CN208752124 U CN 208752124U CN 201820896606 U CN201820896606 U CN 201820896606U CN 208752124 U CN208752124 U CN 208752124U
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Abstract
It is a kind of to take control intelligent electric energy meter, including single-chip microcontroller and north material electric meter case: including for voltage and current sample, calculating metering circuit, relay, with pulse output circuit, for realizing the photoelectric isolating circuit of electrical isolation, the driving circuit for carrying out signal amplification, six LCD liquid crystal displays for showing electricity, electrical network parameter, the order for main website to be issued be transmitted to the RS circuit of single chip control unit, the preservation circuit for saving current power amount, status data；The single-chip microcontroller is electrically connected with photoelectric isolating circuit, driving circuit, six LCD liquid crystal displays, RS circuit, data storage circuit respectively, one terminal connecting zero line of metering circuit, another termination photoelectric isolating circuit；Relay one end taps into line, outlet, another termination driving circuit；There is a branch to connect on inlet wire with metering circuit；High pressure resistant, strong antijamming capability, it is highly-safe, it is at low cost, easily promote.
Description
Technical field
It is specifically a kind of to take control intelligent electric energy meter the utility model relates to a kind of electric energy meter.
Background technique
The information exchanges such as remote recharge, parameter setting will be carried out with main website by taking in control intelligent electric energy meter operational process.These
Data can normally measure electric energy meter and play an important role, and have to guarantee these data safety in communication process
Property, prevent communication data to be forged and be tampered.The DL/T645 serial communications specification that existing electric energy meter generallys use, exists
It is not high pressure resistant, the weak problem of anti-interference ability.
Utility model content
In order to solve the problems, such as above, the utility model provides a kind of highly-safe, high pressure resistant, strong antijamming capability, at
This low, expense control intelligent electric energy meter easily promoted.
The technical solution adopted in the utility model is: a kind of expense controls intelligent electric energy meter, including single-chip microcontroller and north material electric meter case,
It is characterized by comprising for voltage and current sample, calculating metering circuit, relay, with pulse output circuit, use
In the photoelectric isolating circuit of realization electrical isolation, the driving circuit for carrying out signal amplification, for showing electricity, electrical network parameter
Six LCD liquid crystal displays, the order for main website to be issued be transmitted to the RS485 circuit of single chip control unit, for saving
The preservation circuit of current power amount, status data；The single-chip microcontroller respectively with photoelectric isolating circuit, driving circuit, six LCD liquid
Brilliant screen, the electrical connection of RS485 circuit, data storage circuit, one terminal connecting zero line of metering circuit, another termination photoelectric isolating circuit；After
Electric appliance one end taps into line, outlet, another termination driving circuit；There is a branch to connect on inlet wire with metering circuit；Above-mentioned metering electricity
Road, relay, with pulse output circuit, photoelectric isolating circuit, driving circuit, single-chip microcontroller, six LCD liquid crystal displays, RS485
Circuit (8), data storage circuit are integrated on one piece of pcb board, and entire pcb board is solid with self-tapping screw in north material electric meter case
It is fixed.
Further, the metering circuit carries out electrical energy measurement to electric current, the voltage of input, is converted into electrical energy pulse, instead
Positive electrical energy measurement is also changed into circuit, the part circuit is using RN8209 as core, while real-time power and power factor
It is sent into ammeter.
Further, the single-chip microcontroller uses the FM3308 of Fudan University's microelectronics, XT crystal clock oscillating circuit
There are hardware watchdog in 32.768kHz, inside, use time-sharing multiplexing technology as required on hardware, realizes and calculate and control.
Further, the RS485 circuit using HYM3085 as communication chip, be isolated with other circuits by telecommunication circuit.
Further, the relay uses magnetic latching relay, and coil, which leads to forward current relay, to be connected, and closing coil is logical
Back-current relay disconnects, and contact keeps using permanent magnet.
Further, the data of the data storage circuit, which save, uses Micorchip E2ROM
24LC256 erasable 10,000,000 times, saves data and the states such as electricity, area code, number.
Further, the single-chip microcontroller and the transmission of metering circuit signal use Phototube Coupling, isolation voltage > 4000V, power supply
Transformer isolation voltage > 4000V.
Further, input voltage route fire zero curve is equipped with varistor.
Further, the single-chip microcontroller includes encrypting module and deciphering module.
The beneficial effects of the utility model and feature are: high pressure resistant, strong antijamming capability, highly-safe, at low cost, easily push away
Extensively.
Detailed description of the invention
Fig. 1 is the overall structure diagram of the preferred embodiment of the utility model；
Figure label respectively indicates: 1- metering circuit, 2- relay, and 3- is exported with electric pulse, 4- photoelectric isolating circuit, 5-
Driving circuit, 6- single-chip microcontroller, six lCD of 7-, 8-RS485 circuit, 9- data storage circuit.
Specific embodiment
The utility model is further described with reference to the accompanying drawing:
Fig. 1 is please referred to, it is a kind of to take control intelligent electric energy meter, including single-chip microcontroller 6 and north material electric meter case, the use of single-chip microcontroller 6
There are a hardware watchdog in the FM3308 of Fudan University's microelectronics, XT crystal clock oscillating circuit 32.768kHz, inside, on hardware as required
It using time-sharing multiplexing technology, realizes and calculates and control, to improve safety, single-chip microcontroller 6 includes encrypting module and deciphering module.
The expense control intelligent electric energy meter further includes for the metering circuit 1 to voltage and current sample, calculating, relay 2, use
Pulse output circuit 3, for realizing the photoelectric isolating circuit 4 of electrical isolation, the driving circuit 5 for carrying out signal amplification,
For showing that it is single that six LCD liquid crystal displays 7 of electricity, electrical network parameter, the order for main website to be issued are transmitted to single-chip microcontroller control
RS485 circuit 8, the preservation circuit 9 for saving current power amount, status data of member；The single-chip microcontroller 6 respectively with photoelectricity every
It is electrically connected from circuit 4,5, six LCD liquid crystal displays 7 of driving circuit, RS485 circuit 8, data storage circuit 9, metering circuit 1 one
Terminal connecting zero line, another termination photoelectric isolating circuit 4；2 one end of relay taps into line, outlet, another termination driving circuit 5；Inlet wire
On there is a branch to connect with metering circuit 1；Electric current, the voltage of 1 pair of metering circuit input carry out electrical energy measurement, are converted into electricity
Energy impulse, negater circuit also change into positive electrical energy measurement, the part circuit using RN8209 as core, while real-time power and
Power factor is sent into ammeter.
Above-mentioned metering circuit 1, relay 2, with pulse output circuit 3, photoelectric isolating circuit 4, driving circuit 5, monolithic
6, six LCD liquid crystal displays 7 of machine, RS485 circuit 8, data storage circuit 9 are integrated on one piece of pcb board, and entire pcb board is mounted in the first day of the lunar month
Expect to be fixed in electric meter case with self-tapping screw.
The RS4858 circuit using HYM3085 as communication chip, be isolated with other circuits by telecommunication circuit.The relay
Device 2 uses magnetic latching relay, and coil, which leads to forward current relay, to be connected, and closing coil (SG) leads to back-current relay and disconnects,
Contact keeps using permanent magnet.The data of the data storage circuit 9, which save, uses Micorchip E2ROM 24LC256,
Erasable 10,000,000 times, save data and the states such as electricity, area code, number.
Metering circuit (master chip RN8209) on the one hand converts the Current Voltage for inputting ammeter according to electrical energy measurement principle
At electrical energy pulse, after Phototube Coupling, it is sent to single chip control unit and is measured.On the other hand, through exporting electricity with electric pulse
Road is sent on the signal terminal of ammeter, is used convenient for detection and external teletransmission.Metering circuit simultaneously to voltage and current sample,
It is obtained in the electrical network parameters such as power and power factor deposit metering chip internal register by operation.Real-time power and function
The electrical network parameters such as rate factor are read by photoelectric isolating circuit by single chip control unit.Single chip control unit is to metering circuit
Incoming electrical energy pulse carries out electric quantity metering, and reads metering chip internal electric network parameter register by photoelectric isolating circuit,
And the data such as electricity, electrical network parameter are shown by liquid crystal display.Single chip control unit believes current power amount, state etc.
In breath write-in data storage circuit.The order that RS485 circuit issues main website is transmitted to single chip control unit, single-chip microcontroller control
Unit parses the order of receipts, and makes response.When main website issues actuating of relay order, single chip control unit is logical
It crosses relay drive circuit and carries out relay and operate a switch feed motion.
Power transformer uses three 2VA/3 windings, and a winding output 9V/20mA supplies metering circuit, a winding
It exports 9V/20mA and supplies RS485 circuit, a winding output 10.5V/120mA supplies single chip circuit, the voltage after rectification
It is directly fed to relay drive circuit.
It is primary to be greater than 4000V, isolation voltage between measure winding and single-chip microcontroller winding with single-chip microcontroller winding internal ionization voltage
Greater than 4000V, primary to be greater than 2000V with measure winding and RS485 interface winding internal ionization voltage, power circuit design must be examined
Consider 420V voltage condition, voltage is no more than 36V before 78L05, and in addition power transformer primary string thermistor, ensures high voltage
Under do not damage.
The Electro Magnetic Compatibility of metering circuit and it is anti-interference by RN8209 chip and layout determines, entire single chip circuit with count
It measures circuit signal transmission and uses Phototube Coupling, isolation voltage > 4000V adds power transformer isolation voltage > 4000V.Simultaneously
It is noted that circuit board is physically isolated and (has a certain distance).Add varistor in input voltage route fire zero curve, it is therefore an objective to hinder
Only lightning stroke and high-frequency impulse are passed to single chip circuit, interference single chip circuit work.
The encryption method of encrypting module is as follows:
Step 1: main website or ammeter carry out framing by 645 specifications to data to be sent；
Step 2: the frame organized being grouped by 4 byte a line, is divided into n row；
Step 3: temporary key is calculated according to mailing address；
Step 4: the data after grouping are encrypted with key；
Step 5: MAC being calculated to encrypted data, calculated result is placed on the (n+1)th row；
Step 6: obtained ciphertext and MAC, in addition the leading 0xfe of 4 bytes, issues；
The decryption method of deciphering module is as follows:
Step 1: main website or ammeter are after receiving first leading character, when not receiving next byte more than 100 milliseconds
Data a, it is believed that frame data harvest；
Step 2: leading character being removed to the data of receiving, is grouped by 4 byte a line, is divided into n+1 row；
Step 3: MAC calculating being carried out to preceding n row, and compares whether consistent with the MAC received in data frame, unanimously continues to locate
Reason, it is inconsistent not handle；
Step 4: temporary key is calculated according to mailing address；
Step 5: ciphertext being decrypted to obtain 645 data frames；
Step 6: carrying out data parsing according to 645 specifications.
The basic principles and main features of the present invention and the advantages of the present invention have been shown and described above.Current row
The technical staff of industry is described in above embodiments and description it should be appreciated that the present utility model is not limited to the above embodiments
Only illustrate the structural relation and principle of the utility model, on the premise of not departing from the spirit and scope of the utility model, this
Utility model will also have various changes and improvements, and these various changes and improvements fall within the scope of the claimed invention.
The protection scope of the present invention is defined by the appended claims and their equivalents.
Claims (9)
1. a kind of take control intelligent electric energy meter, including single-chip microcontroller (6) and the first day of the lunar month expect that electric meter case, it is characterized by comprising for voltage
With current sample, the metering circuit (1) of calculating, relay (2), with pulse output circuit (3), for realizing electrical isolation
Photoelectric isolating circuit (4), the driving circuit (5) for carrying out signal amplification, six LCD for showing electricity, electrical network parameter
Liquid crystal display (7), the order for main website to be issued are transmitted to the RS485 circuit (8) of single chip control unit, for saving currently
The preservation circuit (9) of electricity consumption, status data；The single-chip microcontroller (6) respectively with photoelectric isolating circuit (4), driving circuit (5),
Six LCD liquid crystal displays (7), RS485 circuit (8), data storage circuit (9) electrical connection, (1) one terminal connecting zero line of metering circuit, separately
One termination photoelectric isolating circuit (4)；Relay (2) one end taps into line, outlet, another termination driving circuit (5)；Have one on inlet wire
Branch is connect with metering circuit (1)；Above-mentioned metering circuit (1), relay (2), with pulse output circuit (3), Phototube Coupling
Circuit (4), driving circuit (5), single-chip microcontroller (6), six LCD liquid crystal displays (7), RS485 circuit (8), data storage circuit (9) collection
On Cheng Yi block pcb board, entire pcb board is fixed in north material electric meter case with self-tapping screw.
2. according to claim 1 take control intelligent electric energy meter, it is characterised in that: electricity of the metering circuit (1) to input
Stream, voltage carry out electrical energy measurement, are converted into electrical energy pulse, negater circuit also changes into positive electrical energy measurement, while real-time function
Rate and power factor are sent into ammeter.
3. according to claim 1 take control intelligent electric energy meter, it is characterised in that: the single-chip microcontroller (6) uses the micro- electricity of Fudan University
There are hardware watchdog in the FM3308 of son, XT crystal clock oscillating circuit 32.768kHz, inside, use timesharing as required on hardware
Multiplexing technology is realized and calculates and control.
4. according to claim 1 take control intelligent electric energy meter, it is characterised in that: the RS485 circuit (8) uses
HYM3085 is isolated as communication chip, telecommunication circuit with other circuits.
5. according to claim 1 take control intelligent electric energy meter, it is characterised in that: the relay (2) protects relay using magnetic
Device, coil, which leads to forward current relay, to be connected, and closing coil leads to back-current relay and disconnects, and contact keeps using permanent magnetic
Iron.
6. according to claim 1 take control intelligent electric energy meter, it is characterised in that: the data of the data storage circuit (9)
It saves and uses Micorchip E2ROM 24LC256, erasable 10,000,000 times, save electricity, area code, number data and state.
7. according to claim 1 take control intelligent electric energy meter, it is characterised in that: the single-chip microcontroller (6) and metering circuit (1)
Signal transmission uses Phototube Coupling, isolation voltage > 4000V, power transformer isolation voltage > 4000V.
8. according to claim 1 take control intelligent electric energy meter, it is characterised in that: the single-chip microcontroller (6) includes encrypting module
And deciphering module.
9. taking control intelligent electric energy meter described in any claim according to claim 1~8, it is characterised in that: input voltage line
Road fire zero curve is equipped with varistor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820896606.1U CN208752124U (en) | 2018-06-11 | 2018-06-11 | It is a kind of to take control intelligent electric energy meter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820896606.1U CN208752124U (en) | 2018-06-11 | 2018-06-11 | It is a kind of to take control intelligent electric energy meter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208752124U true CN208752124U (en) | 2019-04-16 |
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ID=66053848
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
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| CN201820896606.1U Active CN208752124U (en) | 2018-06-11 | 2018-06-11 | It is a kind of to take control intelligent electric energy meter |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114295881A (en) * | 2021-12-23 | 2022-04-08 | 杭州明特科技有限公司 | Charge control electric signal verification system, electric energy meter and charge control method of electric energy meter |
-
2018
- 2018-06-11 CN CN201820896606.1U patent/CN208752124U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114295881A (en) * | 2021-12-23 | 2022-04-08 | 杭州明特科技有限公司 | Charge control electric signal verification system, electric energy meter and charge control method of electric energy meter |
| CN114295881B (en) * | 2021-12-23 | 2024-02-09 | 杭州明特科技有限公司 | Fee control electric signal verification system, electric energy meter and electric energy meter fee control method |
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