CN205982421U - Smart electric meter of wifi communication - Google Patents

Smart electric meter of wifi communication Download PDF

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Publication number
CN205982421U
CN205982421U CN201620675911.9U CN201620675911U CN205982421U CN 205982421 U CN205982421 U CN 205982421U CN 201620675911 U CN201620675911 U CN 201620675911U CN 205982421 U CN205982421 U CN 205982421U
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module
chip
electric capacity
voltage
electric energy
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CN201620675911.9U
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Chinese (zh)
Inventor
林柏
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Sichuan Jayston Electrical Equipment Co Ltd
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Sichuan Jayston Electrical Equipment Co Ltd
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Abstract

The utility model relates to an electric energy meter, in particular to smart electric meter of wifi communication, including a smart electric meter of wifi communication, include following module: current sample module, voltage sample module, electric energy metering modules, single -chip module, wifi module, antenna module, detection interface circuit, display module, power conversion module, the utility model discloses simple structure, whole stability is good, timing cycle length in the work, measurement accuracy is high, and application scope is wide, and the low power dissipation can be communicated with the host computer through wireless network, and the data transmission volume is big, and transmission stability is high.

Description

A kind of intelligent electric meter of wifi communication
Technical field
The present invention relates to a kind of electric energy meter, particularly to a kind of intelligent electric meter of wifi communication.
Background technology
All the time, induction type machinery electric energy meter has larger market, but mechanical electricity meter has the shortcomings that larger, machinery , because being worked using mechanical rotation mode, frictional force is unstable, therefore less stable for electric energy meter, and the degree of accuracy after transport may Overproof, before the mounting must adjustment again, with the increase of use time after installation and operation, stability can gradually be deteriorated again. Mechanical electric energy meter is because using magnetic structure non-linear distortion greatly, uniformity is poor, therefore will adopt various compensation mechanisms, using benefit Repay mechanism and reduce stability again, be also unfavorable for the adjustment in production and application.
Electronic electric energy meter solves some shortcomings of mechanical power energy meter, but still suffers from electric energy meter and external device data The problem of transmission more inconvenience, common ammeter communication mode is communicated by the industrial bus mode such as RS232 or RS485, Cable wiring manufacture amount is too greatly it has not been convenient to implement on a large scale;And carrier communication domestic at present be entirely arrowband FSK carrier wave, this also deposits Many problems, the load characteristic impact of power line first is larger, easily causes the unstable unreliable of communication channel, and The transfer rate of FSK carrier schemes not, does not reach the requirement of real-time communication.
Content of the invention
It is an object of the invention to the above-mentioned deficiency in the presence of overcoming prior art, provide a kind of acquisition precision high, steady The intelligent electric meter of qualitative strong wifi communication.In order to realize foregoing invention purpose, the invention provides technical scheme below:
A kind of intelligent electric meter of wifi communication is it is characterised in that include with lower module:Current sample module:Including shunting Circuit and current filtering circuit, the current signal that load current is carried out shunting with after filtering process is sent to electric energy metering module Current channel;Voltage sample module:Including voltage attenuation circuit and voltage filtering circuit, civil power is carried out being depressured filtered Voltage signal is sent to the voltage channel of electric energy metering module;Electric energy metering module:Current signal and voltage signal synthesis are turned It is changed to pulsed power signal, and export one-chip computer module and detection interface circuit;One-chip computer module:Pulsed power signal is entered Row is processed, and sends it to display module;Wifi module:The signal that one-chip computer module is sended over sends after being processed To Anneta module;Anneta module:Antenna is mated and is sent with the signal that wifi module sends;Detection interface circuit: Display electric energy metering module working condition, and external apparatus interface is provided;Display module:The metering situation of display electric energy meter;Electricity Source modular converter:External voltage is changed, is electric energy metering module and one-chip computer module offer operating voltage.
Further, electric energy metering module uses ADE7755 chip, and ADE7755 is applied to the high-precision of single phase distribution system Degree electric energy metrical IC, it can provide the instantaneous active power and average active power based on bus voltage and Current calculation, puts down All active power is transported to after one-chip computer module is processed and is sent to display module, and instantaneous active power is transported to detection interface Circuit, is verified by external equipment.
Further, power transfer module structure is:The positive output end of transformer T1 is arrived by the positive diode D1 that connects The input of chip IC 1, as module voltage output end, the input of chip IC 1 passes through forward direction to the output end of chip IC 1 respectively Polar capacitor E1 and electric capacity C2 ground connection, the output end of chip IC 1 is passed through normal polarity electric capacity E2 and E3 respectively and is grounded, by external electrical Pressure is converted to operating voltage needed for electric energy metering module and one-chip computer module, chip input/output terminal all by capacity earth, Ensure the stability of voltage conversion.
Further, chip IC 1 uses chip 78L05, provides stable 5V voltage, and has good internal current limit System and Thermal shutdown characteristic.
Further, detection interface circuit structure is:Circuit input end passes through resistance R13 and connects light-emitting diodes in parallel Pipe D4 and the positive pole of light emitting diode D3, the negative pole of light emitting diode D4 and light emitting diode D3 connects the defeated of photoelectrical coupler U1 Enter end, as the output end detecting interface circuit, light emitting diode group in parallel is used for preliminary the output end of photoelectrical coupler U1 The working condition of display electric energy metering module, photoelectrical coupler carries out signal isolation it is ensured that the job stability of electric energy meter, prevents Only external calibration equipment disturbs to electric energy meter work.
Further, wifi module uses CC1110 chip.It has excellent wireless receiving sensitivity and powerful resisting Interference, has battery detection and temperature sensing function, and outside need circuit is less, can be realized respond well with relatively low cost Radio communication.
Further, antenna module structure is:First input end is sequentially connected inductance L35 and electric capacity C33 ground connection, and second is defeated Enter end and connect electric capacity C38 ground connection, first input end is also sequentially connected electric capacity C34 and inductance L38 to second input, electric capacity C34 Node and between inductance L38 passes sequentially through inductance L36, inductance L37, electric capacity C37 and resistance R35 and is connected to onboard antenna, inductance Electric capacity C35 and electric capacity C36 ground connection is also passed through at L37 two ends respectively.Node between antenna-matching circuit electric capacity C37 and resistance R33 is also Sub-miniature A connector is connected to by resistance R36.Circuit is to onboard antenna match it is ensured that the peak power of wireless signal sends, such as simultaneously Router is distant, it is possible to use the external helical antenna of SMA interface.
In sum, present configuration is simple, and general stability is good, and the adjustment cycle in work is long, and certainty of measurement is high, fits Wide with scope, low in energy consumption, can be communicated with main frame by wireless network, volume of transmitted data is big, transmission stability is high simultaneously.
Brief description:
Fig. 1 is the principle assumption diagram of the present invention;
Fig. 2 is the power transfer module circuit diagram of the present invention;
Fig. 3 is the detection interface circuit figure of the present invention;
Fig. 4 is the wifi module circuit diagram of the present invention;
Fig. 5 is the Anneta module circuit diagram of the present invention.
Specific embodiment
With reference to test example and specific embodiment, the present invention is described in further detail.But this should not be understood Scope for the above-mentioned theme of the present invention is only limitted to below example, all belongs to this based on the technology that present invention is realized The scope of invention.
Embodiment
A kind of intelligent electric meter of wifi communication, including with lower module:Current sample module:Including shunt circuit and electric current filter Wave circuit, load current is carried out shunting the current channel being sent to electric energy metering module with the current signal after filtering process; Voltage sample module:Including voltage attenuation circuit and voltage filtering circuit, civil power is carried out being depressured filtered voltage signal biography Deliver to the voltage channel of electric energy metering module;Electric energy metering module:Current signal and voltage signal synthesis are converted to power arteries and veins Rush signal, and export one-chip computer module and detection interface circuit;One-chip computer module:Pulsed power signal is processed, and Send it to display module and wifi module;Wifi module:The signal that one-chip computer module is sended over is sent out after being processed Deliver to Anneta module;Anneta module:Antenna is mated and is sent with the signal that wifi module sends;Detection interface electricity Road:Display electric energy metering module working condition, and external apparatus interface is provided;Display module:The metering situation of display electric energy meter; Power transfer module:External voltage is changed, is electric energy metering module and one-chip computer module offer operating voltage.
As shown in Fig. 2 power transfer module structure is:The positive output end of transformer T1 is arrived by the positive diode D1 that connects The input of chip IC 1, as module voltage output end, the input of chip IC 1 just passes through the output end of chip IC 1 respectively To polar capacitor E1 and electric capacity C2 ground connection, the output end of chip IC 1 is passed through normal polarity electric capacity E2 and E3 respectively and is grounded.Chip IC1 uses chip 78L05.
Diode D1 can use IN4007, plays rectified action, and the AC conversion after transformation is the direct current of pulse Electricity, can connect a piezo-resistance between the two of transformer T1 input simultaneously, carry out voltage when circuit bears overvoltage Clamper, absorbs unnecessary electric current to protect internal Sensitive Apparatus.Piezo-resistance can be using the work compression resistance with 820V 14K821.
As shown in figure 3, detection interface circuit structure is:Circuit input end passes through resistance R3 and connects light emitting diode in parallel D4 and the positive pole of light emitting diode D3, the negative pole of light emitting diode D4 and light emitting diode D3 connects the input of photoelectrical coupler U1 End, the output end of photoelectrical coupler U1 is as the output end detecting interface circuit.
Photoelectrical coupler U1 can use PS2501-1, and it includes a gallium arsenide light emitting diode and a NPN type silicon Phototransistor, has high-isolating, and device is encapsulated using DIP, is suitable for piercing welding on PCB, easy to operate, core The larger convenient device of ratio between piece area and package area radiates.
As shown in figure 4, wifi module uses CC1110 chip, build external circuit using CC1110 minimum system.
As shown in figure 5, antenna module structure is:First input end is sequentially connected inductance L35 and electric capacity C33 and is grounded, and second Input connects electric capacity C38 ground connection, and first input end is also sequentially connected electric capacity C34 and inductance L38 to second input, electric capacity Node between C34 and inductance L38 passes sequentially through inductance L36, inductance L37, electric capacity C37 and resistance R35 and is connected to onboard antenna, electricity Electric capacity C35 and electric capacity C36 ground connection is also passed through at sense L37 two ends respectively.Node between antenna-matching circuit electric capacity C37 and resistance R33 It is connected to sub-miniature A connector also by resistance R36.

Claims (7)

1. a kind of intelligent electric meter of wifi communication is it is characterised in that include with lower module:
Current sample module:Including shunt circuit and current filtering circuit, load current is carried out after shunting and filtering process Current signal is sent to the current channel of electric energy metering module;
Voltage sample module:Including voltage attenuation circuit and voltage filtering circuit, civil power is carried out being depressured filtered voltage letter Number it is sent to the voltage channel of electric energy metering module;
Electric energy metering module:Current signal and voltage signal synthesis are converted to pulsed power signal, and export single-chip microcomputer mould Block and detection interface circuit;
One-chip computer module:Pulsed power signal is processed, and is sent it to display module and wifi module;
Wifi module:The signal that one-chip computer module is sended over is sent to Anneta module after being processed;
Anneta module:Antenna is mated and is sent with the signal that wifi module sends;
Detection interface circuit:Display electric energy metering module working condition, and external apparatus interface is provided;
Display module:The metering situation of display electric energy meter;
Power transfer module:External voltage is changed, is electric energy metering module and one-chip computer module offer operating voltage.
2. a kind of intelligent electric meter of wifi communication according to claim 1 is it is characterised in that described electric energy metering module makes Use ADE7755 chip.
3. a kind of intelligent electric meter of wifi communication according to claim 1 is it is characterised in that described power transfer module is tied Structure is:The positive output end of transformer T1 passes through the positive diode D1 that connects to the input of chip IC 1, the output end of chip IC 1 As module voltage output end, the input of chip IC 1 passes through normal polarity electric capacity E1 and electric capacity C2 ground connection, chip IC 1 respectively Output end respectively pass through normal polarity electric capacity E2 and E3 be grounded.
4. a kind of intelligent electric meter of wifi communication according to claim 3 is it is characterised in that described chip IC 1 uses core Piece 78L05.
5. a kind of intelligent electric meter of wifi communication according to claim 1 is it is characterised in that described detection interface circuit is tied Structure is:Circuit input end passes through the positive pole that resistance R3 connects light emitting diode D4 in parallel and light emitting diode D3, light-emitting diodes The negative pole of pipe D4 and light emitting diode D3 connects the input of photoelectrical coupler U1, and the output end of photoelectrical coupler U1 is as detection The output end of interface circuit.
6. a kind of intelligent electric meter of wifi communication according to claim 1 is it is characterised in that described wifi module uses CC1110 chip.
7. a kind of intelligent electric meter of wifi communication according to claim 1 is it is characterised in that described antenna module structure For:First input end is sequentially connected inductance L35 and electric capacity C33 ground connection, and the second input connects electric capacity C38 ground connection, the first input End is also sequentially connected electric capacity C34 and inductance L38 to second input, and the node between electric capacity C34 and inductance L38 passes sequentially through inductance L36, inductance L37, electric capacity C37 and resistance R35 are connected to onboard antenna, and inductance L37 two ends also pass through electric capacity C35 and electric capacity respectively C36 is grounded, and the node between antenna-matching circuit electric capacity C37 and resistance R33 is connected to sub-miniature A connector also by resistance R36.
CN201620675911.9U 2016-06-30 2016-06-30 Smart electric meter of wifi communication Active CN205982421U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201620675911.9U CN205982421U (en) 2016-06-30 2016-06-30 Smart electric meter of wifi communication

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201620675911.9U CN205982421U (en) 2016-06-30 2016-06-30 Smart electric meter of wifi communication

Publications (1)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108287264A (en) * 2018-01-05 2018-07-17 东莞市韦伯电子科技有限公司 A kind of multi-functional meter electric appliance
CN109839527A (en) * 2017-11-28 2019-06-04 中移物联网有限公司 The communication module and intelligent electric meter of intelligent electric meter

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109839527A (en) * 2017-11-28 2019-06-04 中移物联网有限公司 The communication module and intelligent electric meter of intelligent electric meter
CN108287264A (en) * 2018-01-05 2018-07-17 东莞市韦伯电子科技有限公司 A kind of multi-functional meter electric appliance

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C14 Grant of patent or utility model
GR01 Patent grant
PE01 Entry into force of the registration of the contract for pledge of patent right

Denomination of utility model: An intelligent watt hour meter based on wifi communication

Effective date of registration: 20221026

Granted publication date: 20170222

Pledgee: Postal Savings Bank of China Limited Chengdu Renmin North Road sub branch

Pledgor: SICHUAN JASTON ELECTRICAL EQUIPMENT CO.,LTD.

Registration number: Y2022510000286

PE01 Entry into force of the registration of the contract for pledge of patent right
PC01 Cancellation of the registration of the contract for pledge of patent right

Granted publication date: 20170222

Pledgee: Postal Savings Bank of China Limited Chengdu Renmin North Road sub branch

Pledgor: SICHUAN JASTON ELECTRICAL EQUIPMENT CO.,LTD.

Registration number: Y2022510000286