CN108490252A - A kind of intelligent electric meter - Google Patents
A kind of intelligent electric meter Download PDFInfo
- Publication number
- CN108490252A CN108490252A CN201810304380.6A CN201810304380A CN108490252A CN 108490252 A CN108490252 A CN 108490252A CN 201810304380 A CN201810304380 A CN 201810304380A CN 108490252 A CN108490252 A CN 108490252A
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- circuit
- intelligent electric
- electric meter
- major control
- mcu
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- 230000005611 electricity Effects 0.000 claims abstract description 35
- 241001269238 Data Species 0.000 claims abstract description 16
- 239000000523 sample Substances 0.000 claims description 26
- 238000005070 sampling Methods 0.000 claims description 16
- 230000003993 interaction Effects 0.000 claims description 6
- 238000005259 measurement Methods 0.000 claims description 6
- 238000004891 communication Methods 0.000 claims description 3
- 230000001681 protective effect Effects 0.000 claims 1
- 238000012544 monitoring process Methods 0.000 abstract description 8
- 230000005856 abnormality Effects 0.000 abstract description 2
- 238000004458 analytical method Methods 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000007689 inspection Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 206010037660 Pyrexia Diseases 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- 238000007405 data analysis Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000000977 initiatory effect Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000008054 signal transmission Effects 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R22/00—Arrangements for measuring time integral of electric power or current, e.g. electricity meters
- G01R22/06—Arrangements for measuring time integral of electric power or current, e.g. electricity meters by electronic methods
- G01R22/10—Arrangements for measuring time integral of electric power or current, e.g. electricity meters by electronic methods using digital techniques
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
- G01K7/00—Measuring temperature based on the use of electric or magnetic elements directly sensitive to heat ; Power supply therefor, e.g. using thermoelectric elements
- G01K7/16—Measuring temperature based on the use of electric or magnetic elements directly sensitive to heat ; Power supply therefor, e.g. using thermoelectric elements using resistive elements
- G01K7/22—Measuring temperature based on the use of electric or magnetic elements directly sensitive to heat ; Power supply therefor, e.g. using thermoelectric elements using resistive elements the element being a non-linear resistance, e.g. thermistor
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Nonlinear Science (AREA)
- Remote Monitoring And Control Of Power-Distribution Networks (AREA)
Abstract
The present invention provides a kind of intelligent electric meter, including AC signal sample circuit, ic for energy metering, MCU major control datas administrative unit, temperature collection circuit, RS485 telecommunication circuits, relay protection circuit；AC signal sample circuit is sequentially connected with ic for energy metering, MCU major control data administrative units；MCU major control datas administrative unit is connected with temperature collection circuit, relay protection circuit respectively；MCU major control datas administrative unit is connected with each other with RS485 telecommunication circuits.The present invention can be dual-purpose with single-phase electricity, three-phase electricity; voltage, electric current, power, electricity consumption and its cable temperature of 3 tunnel single-phase electricity electrical equipments can also be monitored simultaneously; greatly improve monitoring way; and can detect in real time, analyze current line and implement power-off protection and alarm with the presence or absence of multiplexing electric abnormality, reduce Electrical Safety hidden danger；There is this intelligent electric meter independent ID number voltage, electric current, power, electricity consumption, cable temperature and warning message can be sent to specified user's APP terminals.
Description
Technical field
The invention belongs to electronic circuit technology fields, and in particular to a kind of intelligent electric meter.
Background technology
The accident occurred in recent years about Electrical Safety is commonplace, and main cause is that cable uses process meeting for a long time
There is aging phenomenon, the electric current of electrical equipment, power long-time excess result in cable fever, the peace of initiation during electricity consumption
Full accident.If ammeter has the current power of monitoring electrical equipment in real time, whether excess, line wires temperature are excessively high
Function, and can will can well prevent the generation of such accident in time into row line power-off protection.
Current common single-phase intelligent ammeter is merely able to measure single-phase electricity or the voltage of single branch, electric current, power, use
The data such as electricity cannot measure the data such as voltage, electric current, power, the electricity consumption of a plurality of branch electrical equipment simultaneously, if user needs
It is to be understood that when a plurality of branch or the voltage of multiple electrical equipments, electric current, power, electricity consumption, need that multiple ammeters are installed, this will make
, equipment total volume excessively high at cost also will accordingly increase, and current single-phase intelligent ammeter can not be suitable for three-phase circuit；Though
Right current three-phase intelligent ammeter, may be implemented single-phase electricity, three-phase electricity double-purpose functional, but can not measure multiple single-phase electricities simultaneously and use
The data such as electric current, voltage, power, the electricity consumption of electric equipment.In addition, existing intelligent electric meter is unable to monitor line cord temperature,
And implement power-off protection and alarm when cable temperature overrate.
Invention content
In order to solve problem above, the present invention provides a kind of intelligent electric meter, can be dual-purpose with single-phase electricity, three-phase electricity, moreover it is possible to same
When monitor voltage, electric current, power, electricity consumption and its cable temperature of 3 tunnel single-phase electricity electrical equipments, greatly improve monitoring road
Number, while need not increase cost and equipment volume, and can detect in real time, analyze current line with the presence or absence of multiplexing electric abnormality reality
Power-off protection and alarm are applied, Electrical Safety hidden danger is reduced；This intelligent electric meter have independent ID number can by voltage, electric current,
Power, electricity consumption, cable temperature and warning message are sent to specified user's APP terminals.
The present invention uses following technical scheme：A kind of intelligent electric meter, including AC signal sample circuit, electrical energy measurement are electric
Road, MCU major control datas administrative unit, temperature collection circuit, RS485 telecommunication circuits, relay protection circuit；AC signal is adopted
Sample circuit is sequentially connected with ic for energy metering, MCU major control data administrative units；MCU major control data administrative units are distinguished
It is connected with temperature collection circuit, relay protection circuit；MCU major control datas administrative unit is mutually interconnected with RS485 telecommunication circuits
It connects.
RS485 telecommunication circuits are connected with each other with external smart host；External smart host and user's APP terminal phase intercommunications
News.
The AC signal sample circuit, including alternating voltage sampling sub-circuit, alternating current sample sub-circuit, the friendship
It includes voltage transformer to flow voltage sample sub-circuit, and the alternating current sampling sub-circuit includes current transformer.
The ic for energy metering, including sequentially connected three phase metering chip, current transformer, voltage transformer.
The temperature collection circuit, including sampling resistor, thermistor temp are popped one's head in, the sampling resistor and thermistor
Temp probe constitutes series connection bleeder circuit, and the resistance value of the sampling resistor is 5-10k Ω；When circuit cable temperature increases, institute
The resistance for stating thermistor temp probe reduces, and the sampled voltage at thermistor temp probe both ends can also reduce therewith, and will
Voltage analog signal is transmitted to MCU major control data administrative units.
The relay protection circuit according to the analysis result of MCU major control data administrative units, implements power-off when necessary
Protection comprising sequentially connected output wiring terminal, relay, relay driving sub-circuit.
The MCU major control datas administrative unit, including MCU Master control chips, ID recognition units, time management unit；
The ID recognition units are equipped with the id number for being specific to every intelligent electric meter, and the id number is used to realize with external smart host
Identification when data interaction prevents data recognition errors of the external smart host to smart electricity meter device.
The RS485 telecommunication circuits are communicated for MCU major control datas administrative unit with the data of external smart host,
It can be connected with the smart host of external any support RS485 communication protocols, the data transmission for passing through external smart host is realized
With the data interaction of user's APP terminals.
Invention additionally discloses a kind of courses of work of intelligent electric meter：
The collected alternating current of AC signal sample circuit, voltage signal are transmitted to ic for energy metering, electrical energy measurement
Circuit is handled, and is changed to digital signal and is done operation in inside, and the result of operation is led to SPI interface with pulse signal and is transferred to
MCU major control data administrative units, the pulse signal that MCU Master control chips transmit electrical energy measurement unit are handled,
And the cable parameter of APP terminals setting is received according to RS485 telecommunication circuits, judge whether electric current, voltage, power are more than specified
Value, if overrate, control relay protection circuit executes power-off protection.
At the same time, the thermistor temp probe acquisition cable temperature of temperature collection circuit, and by voltage analog signal
Form is transferred to MCU major control data administrative units, and MCU Master control chips carry out A/D to voltage analog signal and are converted into number
Signal, and according to RS485 telecommunication circuits receive APP terminals setting cable parameter, judge cable temperature whether overrate,
If overrate, control relay protection circuit executes power-off protection.
During intelligent electric meter is run, the real-time monitoring current of MCU Master control chips, voltage, power and cable temperature,
The Electrical Safety state (current/voltage/power/cable temperature whether excess) of time management unit recording equipment, and by these
External smart host is transferred to by RS485 telecommunication circuits after data processing, user is transferred data to by external smart host
APP terminals, to which user can be with information such as real time inspection electric current, voltage, power, cable temperature by APP terminals；If in the presence of not
The situation is sent to user's APP terminals by safety utilization of electric power situation, MCU Master control chips (containing information such as reason, time of origins), with
Just user at the first time can grasp electricity condition.
The present invention has following advantageous effect：(1) intelligent electric meter circuit of the present invention is simple, easy to control, realizes list
Mutually electricity, three-phase electricity are dual-purpose, a-table-multi-purpose, moreover it is possible to while monitoring voltage, electric current, power, the electricity consumption of 3 tunnel single-phase electricity electrical equipments
And its cable temperature, monitoring way is greatly improved, meets the needs of user wants to obtain a plurality of branch electrical equipment state；
(2) data, the user such as electric current, voltage and cable temperature of monitoring circuit can know the above letter by APP terminals in real time in real time
Breath, it is very clear with electricity condition to electrical equipment, realize the data interaction with user's APP terminals；(3) existed according to user
The setting of APP terminals cable parameter (cable material, core size) and the data that monitor, and intelligent electric meter can be carried out intelligently
If data analysis, judgement carry out power-off protection and alarm (push warning message to user's APP ends in time there are dangerous electricity consumption
End), Electrical Safety is greatly improved, the generation of electricity consumption danger is prevented.
Description of the drawings
Fig. 1 is the electrical block diagram of intelligent electric meter of the present invention.
Specific implementation mode
Below in conjunction with the drawings and specific embodiments, the present invention is described in detail.
As shown in Figure 1, the present invention provides a kind of intelligent electric meter, including AC signal sample circuit, ic for energy metering,
MCU major control datas administrative unit, temperature collection circuit, RS485 telecommunication circuits, relay protection circuit；AC signal samples
Circuit is sequentially connected with ic for energy metering, MCU major control data administrative units；MCU major control datas administrative unit respectively with
Temperature collection circuit, relay protection circuit are connected；MCU major control datas administrative unit is connected with each other with RS485 telecommunication circuits.
RS485 telecommunication circuits are connected with each other with external smart host；External smart host and user's APP terminal phase intercommunications
News.
The AC signal sample circuit, including alternating voltage sampling sub-circuit, alternating current sample sub-circuit, the friendship
It includes voltage transformer to flow voltage sample sub-circuit, and the alternating current sampling sub-circuit includes current transformer.
The ic for energy metering, including sequentially connected three phase metering chip, current transformer, voltage transformer.
The temperature collection circuit, including sampling resistor, thermistor temp are popped one's head in, the sampling resistor and thermistor
Temp probe constitutes series connection bleeder circuit, and the resistance value of the sampling resistor is 10k Ω；It is described when circuit cable temperature increases
The resistance of thermistor temp probe reduces, and the sampled voltage at thermistor temp probe both ends can also reduce therewith, and will be electric
Press analog signal transmission to MCU major control data administrative units.
The relay protection circuit, for being protected according to the analysis result of MCU major control data administrative units, implementation power-off
Shield comprising sequentially connected output wiring terminal, relay, relay driving sub-circuit.
The MCU major control datas administrative unit, including MCU Master control chips, ID recognition units, time management unit；
The ID recognition units are equipped with the id number for being specific to every intelligent electric meter, and the id number is used to realize with external smart host
Identification when data interaction prevents data recognition errors of the external smart host to smart electricity meter device.
The RS485 telecommunication circuits are communicated for MCU major control datas administrative unit with the data of external smart host,
It can be connected with the smart host of external any support RS485 communication protocols, the data transmission for passing through external smart host is realized
With the data interaction of user's APP terminals.
Invention additionally discloses a kind of courses of work of intelligent electric meter：
Cable parameter is arranged in mobile phone APP terminal in user, i.e. cable material and core size, intelligent electric meter will according to
Parameter set by family is measured in real time, and there are carry out power-off protection when dangerous electricity consumption.
The collected alternating current of AC signal sample circuit, voltage signal are transmitted to ic for energy metering, electrical energy measurement
Circuit is handled, and is changed to digital signal and is done operation in inside, and the result of operation is led to SPI interface with pulse signal and is transferred to
MCU major control data administrative units, the pulse signal that MCU Master control chips transmit electrical energy measurement unit are handled,
And the cable parameter of APP terminals setting is received according to RS485 telecommunication circuits, judge whether electric current, voltage, power are more than specified
Value；If overrate, control relay protection circuit executes power-off protection, while MCU Master control chips are by dangerous electricity consumption
Situation is sent to user's APP terminals (containing information such as reason, time of origins), so that user at the first time can grasp electricity condition.
The thermistor temp probe acquisition cable temperature of temperature collection circuit, and voltage analog signal form is transferred to
MCU major control data administrative units, MCU Master control chips carry out A/D to voltage analog signal and are converted into digital signal, and according to
RS485 telecommunication circuits receive APP terminals setting cable parameter, judge cable temperature whether overrate；If more than specified
Value, control relay protection circuit executes power-off protection, while MCU Master control chips (containing reason, send out dangerous electricity consumption situation
The information such as raw time) user's APP terminals are sent to, so that user at the first time can grasp electricity condition.
During intelligent electric meter is run, the real-time monitoring current of MCU Master control chips, voltage and cable temperature, the time
The Electrical Safety state (current/voltage/power/cable temperature whether excess) of management unit records equipment, and by these data
External smart host is transferred to by RS485 telecommunication circuits after processing, it is whole to transfer data to user APP by external smart host
End, to which user can be with information such as real time inspection electric current, voltage, power, cable temperature by APP terminals.
Claims (10)
1. a kind of intelligent electric meter, which is characterized in that include AC signal sample circuit, ic for energy metering, MCU major control datas
Administrative unit, temperature collection circuit, RS485 telecommunication circuits, relay protection circuit；AC signal sample circuit and electrical energy measurement
Circuit, MCU major control data administrative units are sequentially connected；MCU major control datas administrative unit respectively with temperature collection circuit, after
Protective circuit for electric appliance is connected；MCU major control datas administrative unit is connected with each other with RS485 telecommunication circuits.
2. intelligent electric meter according to claim 1, which is characterized in that the AC signal sample circuit, including alternating current
Pressure sampling sub-circuit, alternating current sample sub-circuit.
3. intelligent electric meter according to claim 2, which is characterized in that the alternating voltage sampling sub-circuit includes that voltage is mutual
Sensor, the alternating current sampling sub-circuit includes current transformer.
4. intelligent electric meter according to claim 1, which is characterized in that the ic for energy metering, including sequentially connected
Three phase metering chip, current transformer, voltage transformer.
5. intelligent electric meter according to claim 1, which is characterized in that the temperature collection circuit, including sampling resistor, heat
Quick resistance temperature probe, the sampling resistor constitute bleeder circuit of connecting with thermistor temp probe.
6. intelligent electric meter according to claim 5, which is characterized in that the resistance value of the sampling resistor is 5-10k Ω；It is described
The resistance of thermistor temp probe can reduce as cable temperature increases.
7. intelligent electric meter according to claim 1, which is characterized in that the relay protection circuit, including be sequentially connected
Output wiring terminal, relay, relay driving sub-circuit.
8. intelligent electric meter according to claim 1, which is characterized in that the MCU major control datas administrative unit, including
MCU Master control chips, ID recognition units, time management unit.
9. intelligent electric meter according to claim 8, which is characterized in that the ID recognition units are equipped with and are specific to every intelligence
The id number of ammeter, the id number are used to realize identification when data interaction with external smart host, prevent external smart master
Data recognition errors of the machine to smart electricity meter device.
10. intelligent electric meter according to claim 1, which is characterized in that the RS485 telecommunication circuits can appoint with outside
What supports the smart host of RS485 communication protocols to be connected.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810304380.6A CN108490252A (en) | 2018-04-08 | 2018-04-08 | A kind of intelligent electric meter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810304380.6A CN108490252A (en) | 2018-04-08 | 2018-04-08 | A kind of intelligent electric meter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108490252A true CN108490252A (en) | 2018-09-04 |
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ID=63314766
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810304380.6A Pending CN108490252A (en) | 2018-04-08 | 2018-04-08 | A kind of intelligent electric meter |
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| Country | Link |
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| CN (1) | CN108490252A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110824246A (en) * | 2019-11-15 | 2020-02-21 | 广东电网有限责任公司 | Ammeter based on RS485 data routing sharing |
| CN110927657A (en) * | 2019-12-20 | 2020-03-27 | 深圳供电局有限公司 | Electric energy meter error correction method, device and equipment |
| CN112782472A (en) * | 2021-03-05 | 2021-05-11 | 国网山东省电力公司潍坊市寒亭区供电公司 | Safe electric energy meter |
| CN113162057A (en) * | 2021-03-30 | 2021-07-23 | 国网河北省电力有限公司雄安新区供电公司 | Intelligent ammeter box and control method thereof |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202906571U (en) * | 2011-12-30 | 2013-04-24 | 江苏联宏自动化系统工程有限公司 | Power utilization managing device based on multipath power metering and controlling |
| CN105634138A (en) * | 2016-03-18 | 2016-06-01 | 江苏联宏自动化系统工程有限公司 | Multifunctional three-phase electric power monitoring apparatus |
| CN208383984U (en) * | 2018-04-08 | 2019-01-15 | 海南聚能科技创新研究院有限公司 | A kind of intelligent electric meter |
-
2018
- 2018-04-08 CN CN201810304380.6A patent/CN108490252A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202906571U (en) * | 2011-12-30 | 2013-04-24 | 江苏联宏自动化系统工程有限公司 | Power utilization managing device based on multipath power metering and controlling |
| CN105634138A (en) * | 2016-03-18 | 2016-06-01 | 江苏联宏自动化系统工程有限公司 | Multifunctional three-phase electric power monitoring apparatus |
| CN208383984U (en) * | 2018-04-08 | 2019-01-15 | 海南聚能科技创新研究院有限公司 | A kind of intelligent electric meter |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110824246A (en) * | 2019-11-15 | 2020-02-21 | 广东电网有限责任公司 | Ammeter based on RS485 data routing sharing |
| CN110927657A (en) * | 2019-12-20 | 2020-03-27 | 深圳供电局有限公司 | Electric energy meter error correction method, device and equipment |
| CN112782472A (en) * | 2021-03-05 | 2021-05-11 | 国网山东省电力公司潍坊市寒亭区供电公司 | Safe electric energy meter |
| CN113162057A (en) * | 2021-03-30 | 2021-07-23 | 国网河北省电力有限公司雄安新区供电公司 | Intelligent ammeter box and control method thereof |
| CN113162057B (en) * | 2021-03-30 | 2023-07-07 | 国网河北省电力有限公司雄安新区供电公司 | Intelligent ammeter box and control method thereof |
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Application publication date: 20180904 |