CN203414523U - Novel intelligent electric energy meter - Google Patents
Novel intelligent electric energy meter Download PDFInfo
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- CN203414523U CN203414523U CN201320372700.4U CN201320372700U CN203414523U CN 203414523 U CN203414523 U CN 203414523U CN 201320372700 U CN201320372700 U CN 201320372700U CN 203414523 U CN203414523 U CN 203414523U
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- electric energy
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- energy meter
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- intelligent electric
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- 230000000875 corresponding Effects 0.000 claims description 5
- 230000000694 effects Effects 0.000 abstract description 2
- 230000002265 prevention Effects 0.000 abstract 1
- 238000005516 engineering process Methods 0.000 description 5
- 230000005540 biological transmission Effects 0.000 description 4
- 241000690470 Plantago princeps Species 0.000 description 3
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Abstract
The utility model diskloses a novel intelligent electric energy meter. The novel intelligent electric energy meter comprises a single-chip microcomputer, an electric energy metering device, a memory, a direct current source, a power supply monitor, a display, a real-time clock circuit, a load controller and a query button. The electric energy metering device, the memory, the direct current source, the power supply monitor, the display, the real-time clock circuit, the load controller and the query button are all connected on the single-chip microcomputer. The novel intelligent electric energy meter further comprises a radio frequency card. The output end of the radio frequency card is connected with the output end of the single-chip microcomputer. The single-chip microcomputer is provided with an RS485 communication serial port. The novel intelligent electric energy meter which adapts to the intelligentization trend of electric energy meters better reflects RFID contact-free, passive and information safety advantages and achieves good power theft prevention effects. The meter reading means is also advanced. IC cards are not easily damaged and polluted.
Description
Technical field
The utility model relates to a kind of electric energy meter, relates in particular to a kind of novel intelligent electric energy meter.
Background technology
There is many defects in induction type electric energy meter and ordinary electronic formula electric energy meter, as function singleness, power-steeling preventing effect is poor, meter reading method is backward, the fragile pollution of IC-card etc., in order to adapt to the intelligentized trend of electric energy meter, radio-frequency (RF) identification (RFID) technology is applied to the transmission of information about power, embodies better the advantages such as RFID contact-free, passive, information security.REID is a kind of non-contact automatic identification technology, is automatically identified destination object and obtained related data by radiofrequency signal.Basic rfid system supports software and hardware three parts by electronic tag (radio-frequency card), reader and application and forms.RFID label is comprised of chip and antenna, and each label has unique electronic code.Different according to the mode that sends radiofrequency signal, label is divided into again two kinds of active and passive types.Active tag initiatively sends radiofrequency signal to read write line by internal battery power supply.Passive label after receiving the electromagnetic wave signal that reader sends, thereby part electromagnetic energy is converted into for own energy of working and makes response.Reader is responsible for to label transmitting read signal and is accepted replying of label, and the object id information of label is decoded, and other related information transmission on the related label of object id information is arrived to main frame for processing.RFID application is supported software and hardware and is mainly responsible for the correlation function of realization and enterprise or organizations.
Utility model content
The purpose of this utility model provides a kind of novel intelligent electric energy meter that need not contact the transmission that just can realize information about power with regard to being in order to address the above problem.
In order to achieve the above object, the present invention has adopted following technical scheme:
The utility model comprises single-chip microcomputer, electric energy metering machine, storer, direct supply, power supply monitor, display, real time clock circuit, load governor and inquiry button, described electric energy metering machine, described storer, described direct supply, described power supply monitor, described display, described real time clock circuit, described load governor and described inquiry button are to be all connected on described single-chip microcomputer, also comprise radio-frequency card, the output terminal of described radio-frequency card is connected with the input end of described single-chip microcomputer, and described single-chip microcomputer is provided with RS485 communication serial port.
Further, described radio-frequency card is provided with that FPDP, reset terminal, address latch port, data write end, data read end, described single-chip microcomputer is provided with programming address port and grounding ports, described FPDP and the corresponding connection of described programming address port, described reset terminal, described address latch port and, described data write end and read the corresponding and described programming address port of end with described data and be connected.
Further, described radio-frequency card model is MFRC500, and described single-chip microcomputer model is MSP430.
The beneficial effects of the utility model are:
The utility model has adapted to the intelligentized trend of electric energy meter, radio-frequency (RF) identification (RFID) technology is applied to the transmission of information about power, embody better the advantage of RFID contact-free, passive, information security, function ratio is more, power-steeling preventing effect is good, meter reading method is advanced, and IC-card is not easy to damage and pollutes.
Accompanying drawing explanation
Fig. 1 is structural principle block diagram of the present utility model.
Fig. 2 is radio-frequency card of the present utility model and the sketch that is connected of single-chip microcomputer.
Embodiment
Below in conjunction with accompanying drawing, the present invention is further described in detail:
As shown in Figure 1, the utility model comprises single-chip microcomputer MSP430, electric energy metering machine ADE7755, storer, direct supply, power supply monitor, display led/LCD, real time clock circuit, load governor and inquiry button, electric energy metering machine ADE7755, storer, direct supply, power supply monitor, display led/LCD, real time clock circuit, load governor and inquiry button are to be all connected on single-chip microcomputer MSP430, also comprise radio-frequency card MFRC500, the output terminal of described radio-frequency card MFRC500 is connected with the input end of described single-chip microcomputer MSP430, described single-chip microcomputer MSP430 is provided with RS485 communication serial port.
As shown in Figure 2, radio-frequency card MFRC500 is provided with FPDP D0～D7, reset terminal RSTPD, address latch port ALE, data write end NWR, data read end NRD and port NCS, described single-chip microcomputer is provided with programming address port P6.0～P6.7, programming address port P2.0, programming address port P1.4, programming address port P1.7, programming address port P1.6 and grounding ports GND, FPDP D0～D7 and the corresponding connection of programming address port P6.0～P6.7, reset terminal RSTPD is connected with programming address port P2.0, address latch port ALE is connected with programming address port P1.4, data write end NWR and are connected with programming address port P1.7, data read end NRD and are connected with programming address port P1.6, port NCS is connected with grounding ports GND.
As depicted in figs. 1 and 2, radio-frequency card model is that MFRC500 or other have the model of identity function, and single-chip microcomputer model is that MSP430 or other have the model of identity function.
Principle of work of the present utility model is: as shown in Figure 1, electric energy metering machine ADE7755 gives single-chip microcomputer MSP430 according to voltage, current input signal production electric flux pulse signal and current direction signal and processes.Single-chip microcomputer MSP430 adds up electric pulse, calculates electric weight storage, according to current rate, dump energy is carried out to subtraction process, and judges whether alarm or power-off simultaneously.Single-chip microcomputer MSP430 constantly reads clock, and determines the rate of current operation.Single-chip microcomputer MSP430 also monitors RS485 bus and infrared communication signal, receives or response command, carries out serial communication.In addition, ammeter is the parameter such as control relay state and cell voltage, power also, to abnomal condition alarm and record.Direct supply is for guaranteeing the normal operation of electric energy meter when grid cut-off, and power supply supervision unit is monitored the working condition of linear electric power network in real time.The break-make of load control section control load.The information interaction of electric energy meter and host computer adopts near infrared light telecommunication and long-range RS485 bus mode.Electric energy meter adopts button to realize the inquiry of key message.
As shown in Figure 2, radio-frequency card MFRC500 is applied to a member in high integrated IC series in 13.56MHz contactless communication.This IC series has been utilized advanced modulation and demodulation concept, fully-integrated under 13.56MHz all types of passive contactless communication modes and agreement.Radio-frequency card MFRC500 supports all layers of IS014443A.Inner transmitter part does not need to increase the antenna (can reach 100mm) that active circuit just can directly drive near operation distance, and receiver partly provides a firm and effective demodulation decoding circuit, for the transponder signal of ISO14443A compatibility.Numerical portion is processed ISO14443A frame and error-detecting (odd even and CRC).In addition, it also supports quick CRYPTOI cryptographic algorithm for verifying the RE of Ml team series of products.Parallel interface can be directly connected to any 8-bit microprocessor easily, great dirigibility is provided to like this design of card reader terminal, applying RFID is the instrument that electric energy meter is realized pre-payment, and by RFID technology, we can realize the pre-payment of electric energy meter easily.Utilize radio-frequency card MFRC500 chip as the value of reading in RFID and depreciation.Because the bus of single-chip microcomputer MSP430 does not extend out, so radio-frequency card MFRC500 directly can not be operated as external memory storage.To this, adopt mode and the MFRC500 of emulation bus to communicate.Here select P6 mouth to be connected with the D0-D7 of radio-frequency card MFRC500, Pl.6 connects data and reads end NRD, and Pl.7 connects data and writes end NWR, and Pl.4 meets address latch end ALE, and P2.0 meets reset terminal RSTPD, and GND port connects NCS port.
Claims (3)
1. a novel intelligent electric energy meter, comprise single-chip microcomputer, electric energy metering machine, storer, direct supply, power supply monitor, display, real time clock circuit, load governor and inquiry button, described electric energy metering machine, described storer, described direct supply, described power supply monitor, described display, described real time clock circuit, described load governor and described inquiry button are all connected on described single-chip microcomputer, it is characterized in that: comprise radio-frequency card, the output terminal of described radio-frequency card is connected with the input end of described single-chip microcomputer, described single-chip microcomputer is provided with RS485 communication serial port.
2. novel intelligent electric energy meter according to claim 1, it is characterized in that: described radio-frequency card is provided with that FPDP, reset terminal, address latch port, data write end, data read end, described single-chip microcomputer is provided with programming address port and grounding ports, described FPDP and the corresponding connection of described programming address port, described reset terminal, described address latch port and, described data write end and read the corresponding and described programming address port of end with described data and be connected.
3. novel intelligent electric energy meter according to claim 1, is characterized in that: described radio-frequency card model is MFRC500, and described single-chip microcomputer model is MSP430.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320372700.4U CN203414523U (en) | 2013-06-26 | 2013-06-26 | Novel intelligent electric energy meter |
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| CN201320372700.4U CN203414523U (en) | 2013-06-26 | 2013-06-26 | Novel intelligent electric energy meter |
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| CN203414523U true CN203414523U (en) | 2014-01-29 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103996273A (en) * | 2014-05-13 | 2014-08-20 | 国家电网公司 | RFID watt hour meter electric energy information collection system and collection method |
| CN104251933A (en) * | 2013-06-26 | 2014-12-31 | 成都新方洲信息技术有限公司 | Novel intelligent electric energy meter |
| CN105866534A (en) * | 2016-05-24 | 2016-08-17 | 南宁市茂百科技有限公司 | Multi-user intelligent electric meter |
-
2013
- 2013-06-26 CN CN201320372700.4U patent/CN203414523U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104251933A (en) * | 2013-06-26 | 2014-12-31 | 成都新方洲信息技术有限公司 | Novel intelligent electric energy meter |
| CN103996273A (en) * | 2014-05-13 | 2014-08-20 | 国家电网公司 | RFID watt hour meter electric energy information collection system and collection method |
| CN105866534A (en) * | 2016-05-24 | 2016-08-17 | 南宁市茂百科技有限公司 | Multi-user intelligent electric meter |
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