CN103995163A - Prepayment watt hour meter by utilizing radio-frequency technology for communication and electric energy information processing method - Google Patents
Prepayment watt hour meter by utilizing radio-frequency technology for communication and electric energy information processing method Download PDFInfo
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- CN103995163A CN103995163A CN201410201331.1A CN201410201331A CN103995163A CN 103995163 A CN103995163 A CN 103995163A CN 201410201331 A CN201410201331 A CN 201410201331A CN 103995163 A CN103995163 A CN 103995163A
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Abstract
The invention discloses a prepayment watt hour meter by utilizing radio-frequency technology for communication. The prepayment watt hour meter comprises a MCU single chip microcomputer, a sensor, a metering chip circuit, an isolating circuit, a prepayment circuit and a power circuit, the MCU single chip microcomputer is respectively connected with the power circuit, the prepayment circuit and the isolating circuit, the sensor is connected with the metering chip circuit, the metering chip circuit is connected with the isolating circuit, a DF7023-J main chip is adopted by the prepayment circuit as a receiving and sending device, shortcomings are overcome, a radio frequency technology chip is adopted on a prepayment circuit of the watt hour meter to be manufactured to be an information receiving and sending device to read electric information of a prepayment electric card manufactured by a radio frequency electronic tag, the characteristics that serial numbers of the radio frequency electronic tag is unique, data are not prone to being attacked hostilely, and data reading speed is high are fully utilized for achieving safe and rapid data reading, and in the use process, the electric card can be in contact with different watt hour meters to read the data, and therefore mechanical damage can be avoided.
Description
Technical field
The present invention relates to watt-hour meter field, specifically, is pre payment watthour meter and the energy information disposal route of utilizing radio-frequency technique communication.
Background technology
Radio-frequency (RF) identification Radio Frequency IDentification is radio-frequency technique, claim again electronic tag, radio frequency identification, it is a kind of communication technology, can identify specific objective and read and write related data by radio signals, and without setting up machinery between recognition system and specific objective or optics contacts, be widely used in library, gate control system, food security is traced to the source etc.
The process of China's electricity market is very rapid, and electric energy is that commodity, the idea of first buying rear use are progressively rooted in the hearts of the people.All kinds of fare collection power meters are now there are, it makes charge change user's power purchase that holds into from loaded down with trivial details manual metering of past, manual valuation, realized electric fees charging management automation, existing magnetic card pre-paying kilowatt-hour meter is because electricity card exists following defect: electricity card repeatedly causes loose contact with occurring damaging after the contact of ammeter draw-in groove chip; Electricity card internal information is easily by malicious attack; Electricity card need divide pros and cons while powering on Card Reader; Owing to having exposed die on electricity card, water-proofing treatment must must be carried out.
Summary of the invention
The object of the present invention is to provide a kind of pre payment watthour meter and energy information disposal route of utilizing radio-frequency technique communication, overcome above-mentioned weak point, on the precharging circuit of watt-hour meter, adopt radio-frequency technique chip to make information transceiver and read the information about power on the made pre-payment electricity card of radio electronic label, make full use of the sequence number uniqueness of radio electronic label, data are difficult for being realized the safe and efficient data of carrying out by malicious attack and the fast feature of data reading speed and read, thereby and electric card can just contact and can avoid occurring mechanical damage by reading out data by different watt-hour meter in use.
The present invention is achieved through the following technical solutions: a kind of pre payment watthour meter that utilizes radio-frequency technique communication, comprise MCU single-chip microcomputer, sensor, computation chip circuit, buffer circuit, precharging circuit and power circuit, described MCU single-chip microcomputer is connected with power circuit, precharging circuit and buffer circuit respectively, described sensor connects computation chip circuit, described computation chip circuit connects buffer circuit, and it is that ADF7023-J is as transceiver that described precharging circuit adopts master chip;
Wherein:
MCU single-chip microcomputer, uses information, prepayment electric expense loading processing and integrates after electric weight uses information data and pre-payment situation information and added up and settle accounts in order to the backstage that sends to electric system by the form of instruction encoding for the treatment of power consumption;
Computation chip circuit, for being to carry out the signal source that isolation coupling is identified and integrated to MCU single-chip microcomputer for buffer circuit by the active power value information of user power utilization received sensor and energy value information processing;
Precharging circuit, adopts REID to carry out the loading of electricity charge pre-payment.
Its principle of work is: being arranged on the active power value information of the received user power utilization of sensor on power lead and energy value information exchange, to cross computation chip processing of circuit be to carry out isolation coupling to the signal source of identifying and integrating in MCU single-chip microcomputer for buffer circuit, user can utilize radio frequency pre-payment electricity to be stuck in precharging circuit, to carry out the loading of electricity charge information, in MCU single-chip microcomputer, these are included to power consumption and use information, prepayment electric expense information is carried out such as decoding, the loading processing such as depth analysis, and integrate electric weight and use the form that information data and pre-payment situation information are instruction encoding to add up and settle accounts in order to the backstage that sends to electric system.In this structure, ADF7023-J is as REID specialty chip module, a extremely low power dissipation, high-performance, highly integrated 2FSK/GFSK/MSK/GMSK transceiver, design effort frequency range is 902 MHz to 958 MHz, contain the ARIB standard T96 frequency range of 950 MHz, support the data rate of 1 kbps to 300 kbps, transmitting RF frequency synthesizer comprises a VCO and a low noise decimal Fractional-N frequency phaselocked loop (PLL) that output channel frequency resolution is 400 Hz.The frequency of operation of VCO is the twice of fundamental frequency, can reduce spurious emissions.The automatic separate configurations of bandwidth of reception and transmission frequency compositor, to realize best phase noise, modulation quality and Time Created, and this device has extremely strong interference rejection ability to the undesired signal in high frequency spectrum noise circumstance, there is mirror image and suppress calibration function, this function does not need to use external RF source, after startup, also do not need user intervention, calibration result can be stored in nonvolatile memory, powers on for transceiver is follow-up.
Further, to better implement the present invention, also comprise display screen and keyboard interface circuit, described MCU single-chip microcomputer connects respectively display screen and keyboard interface circuit, and described display screen adopts LED display.Its principle of work is: MCU single-chip microcomputer sends needs the content showing to show in LCD display, just can form a personal-machine interactive interface in conjunction with the keyboard on keyboard interface circuit, and the data that reach between people and electric energy meter are linked up.
Further, to better implement the present invention, also comprise communication interface circuit, described communication interface circuit connects MCU single-chip microcomputer.Utilize communication interface circuit, can realize by RS232/485 or bluetooth etc. the function such as transfer, storage of data.
Further, to better implement the present invention, also comprise crystal oscillator, described crystal oscillating circuit connects MCU single-chip microcomputer.
Further, to better implement the present invention, the computation chip model of described computation chip circuit is ADE7759.In this structure, ADE7759 is a high precision active power and electric energy metrical IC with serial line interface and pulse output, comprise two second order sigma-delta ADC, a digital integrator (at CH1 passage), reference voltage circuit, temperature sensor and complete active power and the needed whole digital signal processing functions of electric energy metrical, an embedded digital integrator provides the interface being directly connected with current sensor, and the coupling of the fine phase between good long-time stability and electric current and voltage channel is provided.
Further, to better implement the present invention, the isolating coupler of described buffer circuit adopts ADuM7241 digital isolator, ADuM7241 digital isolator part combines high-speed cmos and monolithic air-core transformer technology, outstanding Performance Characteristics can be provided, be better than optocoupler and other integrated coupler.
Further, to better implement the present invention, in the present invention, the model of described MCU single-chip microcomputer is preferably MSP430F415, MSP430F415 chip is a 16 super low power consuming single chip processors of TI company, as the main MCU of electric energy meter, there is 16Kflash inside, 512B RAM, 96 sections of LCD, have 16 risc architectures, 16 registers and function generator in CPU make MSP430F415 microcontroller can reach the highest code efficiency, flexibly clock source; Numerically controlled DCO can make device wake up rapidly and energy can be directly changed into pulse signal from low-power consumption.
The energy information disposal route of utilizing the pre payment watthour meter of radio-frequency technique communication, comprises the following steps:
Steps A: sensing electric power signal, is arranged on sensor on power lead by the electric power signal of active power value information and the energy value info class of sensor monitoring such as user power utilization;
Step B: electric power signal coupling, through steps A, it is to carry out isolation coupling to the power consumption of identifying and integrate to determine user in MCU single-chip microcomputer for buffer circuit that the active power value information of received user power utilization and energy value information exchange are crossed computation chip processing of circuit;
Step C: electricity charge information loads, user can utilize radio frequency pre-payment electricity to be stuck in precharging circuit, to carry out the loading of electricity charge information;
Step D: power information processing, after step C and step D, MCU single-chip microcomputer will include power consumption to these and use information, prepayment electric expense information to carry out loading processing such as decoding, depth analysis, and integrate electric weight and use form that information data and pre-payment situation information are instruction encoding to prepare against to send to the backstage of electric system to add up and settle accounts.
The present invention compared with prior art, has the following advantages and beneficial effect:
(1) the present invention overcomes above-mentioned weak point, on the precharging circuit of watt-hour meter, adopt radio-frequency technique chip to make information transceiver and read the information about power on the made pre-payment electricity card of radio electronic label, the sequence number uniqueness, data that makes full use of radio electronic label is difficult for being realized the safe and efficient data of carrying out by malicious attack and the fast feature of data reading speed and reads, thereby and in use electric card can different watt-hour meter contact just energy reading out data and avoid occurring mechanical damage;
(2) MCU single-chip microcomputer described in the pre payment watthour meter that utilizes radio-frequency technique communication of the present invention sends needs the content showing in LCD display, to show, and just can form a personal-machine interactive interface in conjunction with the keyboard on keyboard interface circuit, the data that reach between people and electric energy meter are linked up
(3) features such as the pre payment watthour meter that utilizes radio-frequency technique communication of the present invention, simple in structure, and the inner integrated chip adopting is all existing mature technology, has super low-power consumption, stable;
(4) pre payment watthour meter that utilizes radio-frequency technique communication of the present invention, adopt radio-frequency technique and design, in existing intelligent electric power field, application can further improve the reliability of operation of existing intelligent grid technology, strengthens the practicality of the Data Collection of electric energy tariff, electric parameter.
Brief description of the drawings
Fig. 1 is hardware block diagram of the present invention.
Embodiment
Below in conjunction with embodiment, the present invention is described in further detail, but embodiments of the present invention are not limited to this.
Embodiment 1:
A kind of pre payment watthour meter that utilizes radio-frequency technique communication, as shown in Figure 1, comprise MCU single-chip microcomputer, sensor, computation chip circuit, buffer circuit, precharging circuit and power circuit, described MCU single-chip microcomputer is connected with power circuit, precharging circuit and buffer circuit respectively, described sensor connects computation chip circuit, described computation chip circuit connects buffer circuit, and it is that ADF7023-J is as transceiver that described precharging circuit adopts master chip;
Wherein:
MCU single-chip microcomputer, uses information, prepayment electric expense loading processing and integrates after electric weight uses information data and pre-payment situation information and added up and settle accounts in order to the backstage that sends to electric system by the form of instruction encoding for the treatment of power consumption;
Computation chip circuit, for being to carry out the signal source that isolation coupling is identified and integrated to MCU single-chip microcomputer for buffer circuit by the active power value information of user power utilization received sensor and energy value information processing;
Precharging circuit, adopts REID to carry out the loading of electricity charge pre-payment.
Its principle of work is: being arranged on the active power value information of the received user power utilization of sensor on power lead and energy value information exchange, to cross computation chip processing of circuit be to carry out isolation coupling to the signal source of identifying and integrating in MCU single-chip microcomputer for buffer circuit, user can utilize radio frequency pre-payment electricity to be stuck in precharging circuit, to carry out the loading of electricity charge information, in MCU single-chip microcomputer, these are included to power consumption and use information, prepayment electric expense information is carried out such as decoding, the loading processing such as depth analysis, and integrate electric weight and use the form that information data and pre-payment situation information are instruction encoding to add up and settle accounts in order to the backstage that sends to electric system.In this structure, ADF7023-J is as REID specialty chip module, a extremely low power dissipation, high-performance, highly integrated 2FSK/GFSK/MSK/GMSK transceiver, design effort frequency range is 902 MHz to 958 MHz, contain the ARIB standard T96 frequency range of 950 MHz, support the data rate of 1 kbps to 300 kbps, transmitting RF frequency synthesizer comprises a VCO and a low noise decimal Fractional-N frequency phaselocked loop (PLL) that output channel frequency resolution is 400 Hz.The frequency of operation of VCO is the twice of fundamental frequency, can reduce spurious emissions.The automatic separate configurations of bandwidth of reception and transmission frequency compositor, to realize best phase noise, modulation quality and Time Created, and this device has extremely strong interference rejection ability to the undesired signal in high frequency spectrum noise circumstance, there is mirror image and suppress calibration function, this function does not need to use external RF source, after startup, also do not need user intervention, calibration result can be stored in nonvolatile memory, powers on for transceiver is follow-up.
Embodiment 2:
The present embodiment is at the enterprising one-step optimization in the basis of embodiment 1, further, and to better implement the present invention, as shown in Figure 1, also comprise display screen and keyboard interface circuit, described MCU single-chip microcomputer connects respectively display screen and keyboard interface circuit, and described display screen adopts LED display.Its principle of work is: MCU single-chip microcomputer sends needs the content showing to show in LCD display, just can form a personal-machine interactive interface in conjunction with the keyboard on keyboard interface circuit, and the data that reach between people and electric energy meter are linked up.
Embodiment 3:
The present embodiment is at the enterprising one-step optimization in the basis of embodiment 1, further, to better implement the present invention, as shown in Figure 1, also comprises communication interface circuit, and described communication interface circuit connects MCU single-chip microcomputer.Utilize communication interface circuit, can realize by RS232/485 or bluetooth etc. the function such as transfer, storage of data.
Embodiment 4:
The present embodiment is at the enterprising one-step optimization in the basis of embodiment 1, further, to better implement the present invention, as shown in Figure 1, also comprises crystal oscillator, and described crystal oscillating circuit connects MCU single-chip microcomputer.
Embodiment 5:
The present embodiment is at the enterprising one-step optimization in the basis of embodiment 1, and further, to better implement the present invention, the computation chip model of described computation chip circuit is ADE7759.In this structure, ADE7759 is a high precision active power and electric energy metrical IC with serial line interface and pulse output, comprise two second order sigma-delta ADC, a digital integrator (at CH1 passage), reference voltage circuit, temperature sensor and complete active power and the needed whole digital signal processing functions of electric energy metrical, an embedded digital integrator provides the interface being directly connected with current sensor, and the coupling of the fine phase between good long-time stability and electric current and voltage channel is provided.
Embodiment 6:
The present embodiment is at the enterprising one-step optimization in the basis of embodiment 1, further, to better implement the present invention, the isolating coupler of described buffer circuit adopts ADuM7241 digital isolator, ADuM7241 digital isolator part combines high-speed cmos and monolithic air-core transformer technology, outstanding Performance Characteristics can be provided, be better than optocoupler and other integrated coupler.
Embodiment 7:
The present embodiment is at the enterprising one-step optimization in the basis of embodiment 1-6, further, to better implement the present invention, in the present invention, the model of described MCU single-chip microcomputer is preferably MSP430F415, MSP430F415 chip is a 16 super low power consuming single chip processors of TI company, as the main MCU of electric energy meter, there is 16Kflash inside, 512B RAM, 96 sections of LCD, have 16 risc architectures, 16 registers and function generator in CPU make MSP430F415 microcontroller can reach the highest code efficiency, flexibly clock source; Numerically controlled DCO can make device wake up rapidly and energy can be directly changed into pulse signal from low-power consumption.
Embodiment 8:
The energy information disposal route of utilizing the pre payment watthour meter of radio-frequency technique communication, comprises the following steps:
Steps A: sensing electric power signal, is arranged on sensor on power lead by the electric power signal of active power value information and the energy value info class of sensor monitoring such as user power utilization;
Step B: electric power signal coupling, through steps A, it is to carry out isolation coupling to the power consumption of identifying and integrate to determine user in MCU single-chip microcomputer for buffer circuit that the active power value information of received user power utilization and energy value information exchange are crossed computation chip processing of circuit;
Step C: electricity charge information loads, user can utilize radio frequency pre-payment electricity to be stuck in precharging circuit, to carry out the loading of electricity charge information;
Step D: power information processing, after step C and step D, MCU single-chip microcomputer will include power consumption to these and use information, prepayment electric expense information to carry out loading processing such as decoding, depth analysis, and integrate electric weight and use form that information data and pre-payment situation information are instruction encoding to prepare against to send to the backstage of electric system to add up and settle accounts.
The present invention overcomes above-mentioned weak point, on the precharging circuit of watt-hour meter, adopt radio-frequency technique chip to make information transceiver and read the information about power on the made pre-payment electricity card of radio electronic label, the sequence number uniqueness, data that makes full use of radio electronic label is difficult for being realized the safe and efficient data of carrying out by malicious attack and the fast feature of data reading speed and reads, thereby and in use electric card can different watt-hour meter contact just energy reading out data and avoid occurring mechanical damage.
The above, be only preferred embodiment of the present invention, not the present invention done to any pro forma restriction, and any simple modification, equivalent variations that every foundation technical spirit of the present invention is done above embodiment, within all falling into protection scope of the present invention.
Claims (8)
1. one kind is utilized the pre payment watthour meter of radio-frequency technique communication, it is characterized in that: comprise MCU single-chip microcomputer, sensor, computation chip circuit, buffer circuit, precharging circuit and power circuit, described MCU single-chip microcomputer is connected with power circuit, precharging circuit and buffer circuit respectively, described sensor connects computation chip circuit, described computation chip circuit connects buffer circuit, and it is that ADF7023-J is as transceiver that described precharging circuit adopts master chip;
Wherein:
MCU single-chip microcomputer, uses information, prepayment electric expense loading processing and integrates after electric weight uses information data and pre-payment situation information and added up and settle accounts in order to the backstage that sends to electric system by the form of instruction encoding for the treatment of power consumption;
Computation chip circuit, for being to carry out the signal source that isolation coupling is identified and integrated to MCU single-chip microcomputer for buffer circuit by the active power value information of user power utilization received sensor and energy value information processing;
Precharging circuit, adopts REID to carry out the loading of electricity charge pre-payment.
2. the pre payment watthour meter that utilizes radio-frequency technique communication according to claim 1, is characterized in that: also comprise display screen and keyboard interface circuit, described MCU single-chip microcomputer connects respectively display screen and keyboard interface circuit, and described display screen adopts LED display.
3. the pre payment watthour meter that utilizes radio-frequency technique communication according to claim 1, is characterized in that: also comprise communication interface circuit, described communication interface circuit connects MCU single-chip microcomputer.
4. the pre payment watthour meter that utilizes radio-frequency technique communication according to claim 1, is characterized in that: also comprise crystal oscillator, described crystal oscillating circuit connects MCU single-chip microcomputer.
5. the pre payment watthour meter that utilizes radio-frequency technique communication according to claim 1, is characterized in that: the computation chip model of described computation chip circuit is ADE7759.
6. the pre payment watthour meter that utilizes radio-frequency technique communication according to claim 1, is characterized in that: the isolating coupler of described buffer circuit adopts ADuM7241 digital isolator.
7. according to the pre payment watthour meter that utilizes radio-frequency technique communication described in claim 1-6 any one, it is characterized in that: the model of described MCU single-chip microcomputer is MSP430F415.
8. an energy information disposal route of utilizing the pre payment watthour meter of radio-frequency technique communication, is characterized in that: comprise the following steps:
Steps A: sensing electric power signal, is arranged on sensor on power lead by the electric power signal of active power value information and the energy value info class of sensor monitoring such as user power utilization;
Step B: electric power signal coupling, through steps A, it is to carry out isolation coupling to the power consumption of identifying and integrate to determine user in MCU single-chip microcomputer for buffer circuit that the active power value information of received user power utilization and energy value information exchange are crossed computation chip processing of circuit;
Step C: electricity charge information loads, user can utilize radio frequency pre-payment electricity to be stuck in precharging circuit, to carry out the loading of electricity charge information;
Step D: power information processing, after step C and step D, MCU single-chip microcomputer will include power consumption to these and use information, prepayment electric expense information to carry out loading processing such as decoding, depth analysis, and integrate power consumption and use form that information data and pre-payment situation information are instruction encoding to prepare against to send to the backstage of electric system to add up and settle accounts.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410201331.1A CN103995163A (en) | 2014-05-13 | 2014-05-13 | Prepayment watt hour meter by utilizing radio-frequency technology for communication and electric energy information processing method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410201331.1A CN103995163A (en) | 2014-05-13 | 2014-05-13 | Prepayment watt hour meter by utilizing radio-frequency technology for communication and electric energy information processing method |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101040293A (en) * | 2004-10-12 | 2007-09-19 | 优赛股份有限公司 | Prepayment system for electric power meters using a contactless smart card with an automatic supply cut-off device |
| CN201278000Y (en) * | 2008-06-12 | 2009-07-22 | 河南新天科技有限公司 | Multi-charge rate double loop electric meter with resistive load monitoring |
| CN201336059Y (en) * | 2008-12-31 | 2009-10-28 | 骆勇强 | Multifunctional prepaid electric energy meter |
| CN201421637Y (en) * | 2009-05-20 | 2010-03-10 | 福建网能科技开发有限责任公司 | Energy meter terminal prepayment system based on carrier wave communication |
| CN201576033U (en) * | 2009-12-25 | 2010-09-08 | 北京博纳电气有限公司 | Three-phase charge control intelligent electric energy meter |
| CN202126719U (en) * | 2011-08-04 | 2012-01-25 | 张春来 | Electronic prepaying watt-hour meter |
-
2014
- 2014-05-13 CN CN201410201331.1A patent/CN103995163A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101040293A (en) * | 2004-10-12 | 2007-09-19 | 优赛股份有限公司 | Prepayment system for electric power meters using a contactless smart card with an automatic supply cut-off device |
| CN201278000Y (en) * | 2008-06-12 | 2009-07-22 | 河南新天科技有限公司 | Multi-charge rate double loop electric meter with resistive load monitoring |
| CN201336059Y (en) * | 2008-12-31 | 2009-10-28 | 骆勇强 | Multifunctional prepaid electric energy meter |
| CN201421637Y (en) * | 2009-05-20 | 2010-03-10 | 福建网能科技开发有限责任公司 | Energy meter terminal prepayment system based on carrier wave communication |
| CN201576033U (en) * | 2009-12-25 | 2010-09-08 | 北京博纳电气有限公司 | Three-phase charge control intelligent electric energy meter |
| CN202126719U (en) * | 2011-08-04 | 2012-01-25 | 张春来 | Electronic prepaying watt-hour meter |
Non-Patent Citations (3)
| Title |
|---|
| 李军 等: "基于RFID技术的三相预付费电能表的设计", 《低压电器》 * |
| 肖翔 等: "基于FM2307的单相非接触式射频CPU卡预付费电能表设计方案", 《重庆电力高等专科学校学报》 * |
| 赵利群 等: "射频识别和传感器网络技术在预付费电能表系统中的应用", 《天津工程师范学院学报》 * |
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Application publication date: 20140820 |