CN202075342U - Three-phase SOC (system-on-chip) intelligent power meter - Google Patents
Three-phase SOC (system-on-chip) intelligent power meter Download PDFInfo
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- CN202075342U CN202075342U CN2010205232233U CN201020523223U CN202075342U CN 202075342 U CN202075342 U CN 202075342U CN 2010205232233 U CN2010205232233 U CN 2010205232233U CN 201020523223 U CN201020523223 U CN 201020523223U CN 202075342 U CN202075342 U CN 202075342U
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Abstract
The utility model discloses a three-phase SOC (system-on-chip) intelligent power meter, which comprises an MCF51EM256 chip and a battery power supply circuit, a power supply management unit, a current/voltage analog signal sampling circuit, a communication circuit, a battery and power failure detection circuit, an external data memory, a crystal oscillation circuit, a display circuit, a key circuit, an alarm circuit and an input/output circuit matched with the MCF51EM256 chip. The battery power supply circuit is used for supplying power to the MCF51EM256 chip, the power supply management unit is used for managing power supply modes of the battery power supply circuit, the current/voltage analog signal sampling circuit is used for collecting signals of the power supply circuit and providing the signals for the MCF51EM256 chip, the communication circuit is used for realizing exchange of various data of a user, the power meter and the chip in the power meter, the battery and power failure detection circuit is used for detecting the voltage of a battery and providing detection signals for the MCF51EM256 chip to select the power supply modes, the external data memory is used for storing power measurement data, the crystal oscillation circuit is used for providing crystal oscillation signals for the MCF51EM256 chip, and the display circuit, the key circuit, the alarm circuit and the input/output circuit are used for realizing input and output of power meter information.
Description
Technical field
The utility model relates to electric energy metrical and intelligent electric meter field, is specifically related to the Circuits System of intelligent electric meter.
Background technology
Along with SOC (system on a chip) SOC(System on a Chip, system level chip) the increasingly mature and application in all trades and professions of technology, the SOC chip that the ammeter industry begins gradually modulus to be mixed is introduced the design of intelligent electric meter.Generally popularization along with intelligent grid, further improve the intelligent electric meter performance demands in ammeter market, and also require whole this reduction of telogenesis, minification significantly in order to tackle market competition, and the general MCU of traditional employing (Micro Control Unit), add special-purpose electric energy computation chip, demand that the conventional separate design scheme that adds various peripheral components can not satisfy the novel intelligent ammeter.
Summary of the invention
The purpose of this utility model is to provide a kind of three-phase SOC intelligent electric meter, in order to improve the cost performance of intelligent electric meter, meets the need of market.
The three-phase SOC intelligent electric meter that the utility model provides comprises MCF51EM256 chip and the battery feed circuit, Power Management Unit, current/voltage simulating signal sampling circuit, communicating circuit, battery and power-fail detection circuit, external data memory, crystal oscillating circuit, display circuit, key circuit, warning circuit and the imput output circuit that cooperate with this chip.
In the utility model, battery feed circuit is the MCF51EM256 chip power supply, the powering mode of Power Management Unit management battery feed circuit, the signal that current/voltage simulating signal sampling circuit is gathered supply line offers the MCF51EM256 chip, communicating circuit is used for realizing the exchange of various data between user and ammeter and ammeter inside chip, battery and power-fail detection circuit detect cell voltage and detection signal are offered the MCF51EM256 chip for model selection, external data memory is used for the storage of electrical energy continuous data, crystal oscillating circuit provides crystal oscillator signal, display circuit for the MCF51EM256 chip, key circuit, warning circuit and imput output circuit are used to realize the input/output function of ammeter information.
Description of drawings
Fig. 1 is the utility model ultimate principle block diagram.
Embodiment
As shown in Figure 1, the intelligent electric meter that provides of present embodiment comprises: MCF51EM256 chip and the battery feed circuit, Power Management Unit, current/voltage simulating signal sampling circuit, 485 communicating circuits, infrared communication circuit, battery and power-fail detection circuit, external data memory, crystal oscillating circuit, display circuit, key circuit, warning circuit and the imput output circuit that cooperate with the MCF51EM256 chip.
The MCF51EM256 chip internal disposes the duplex high precision analog-to-digital conversion module in the present embodiment, high precision bandgap reference voltage module, synchronous or the asynchronous communication module of multichannel, the multichannel comparator module, microprocessor management of computing unit, the hardware multiplier module, program and data memory module, temperature sensor, real-time clock module, power supply ground, the power on and off reseting module, battery management module, the programmable Timer module, driver module, the keyboard load module, IO mouth control module, the external data storage interface, crystal oscillation and frequency multiplication module.
Battery feed circuit provides working power for the battery management module of MCF51EM256 chip for chip, the powering mode of Power Management Unit management battery feed circuit.Each phase current, voltage signal that electric current, voltage analog signal sampling circuit will be imported ammeter carry out processing such as filtering, step-down, it is become can be by the direct feeble signal of accepting of MCF51EM256 chip, by the duplex high precision analog-to-digital conversion module input of MCF51EM256 chip.The high precision bandgap reference voltage module of MCF51EM256 chip provides ADC sampling benchmark for electric current, voltage analog signal sampling circuit.The driver module of MCF51EM256 chip cooperates display circuit, alarm lamp circuit, is used for showing the correlation behavior information of ammeter and the information such as each electric parameter of the required real-time demonstration of user.The information input that button inputting circuits cooperates the keyboard load module of MCF51EM256 chip the user need can be set or control.485 communicating circuits, infrared communication circuit are used for realizing the exchange of various data between user and ammeter and ammeter inside chip.Communicating circuit can also be or comprise carrier communication, SPI communication, IIC communication etc.The IO mouth control module of MCF51EM256 chip cooperates with imput output circuit.External data memory comprises Flash type and Eeprom type storer, is used for the external data storage interface storage data by the MCF51EM256 chip.The power on and off reseting module of MCF51EM256 chip is used for.Battery and power-fail detection circuit are used to detect the battery feed circuit operating voltage, and the multichannel comparator module of MCF51EM256 chip is judged cell voltage, thereby select the mode of operation of ammeter.The temperature sensor acquisition chip temperature of MCF51EM256 built-in chip type is as the foundation of the temperature compensation of devices such as real-time clock module, high precision bandgap reference voltage module, CT.The real-time clock module of MCF51EM256 built-in chip type produces real-time information such as year, month, day, hour, min, second automatically, but, need carry out temperature compensation and inceptive error calibrating to this clock system according to the secondary temperature curve and the fundamental error of external crystal oscillation circuit for the accuracy under the varying environment temperature that guarantees this clock system.The power on and off reseting module of MCF51EM256 built-in chip type is used to export the power on and off signal.
The function that the utility model is finished electric energy metrical mainly is meant: utilize the high precision bandgap reference voltage module of MCF51EM256 chip that built-in reference voltage V ref is provided, as ADC sampling benchmark; Utilize the duplex high precision analog-to-digital conversion module of MCF51EM256 chip to gather respectively by the faint simulating signal after the conversion of current/voltage simulating signal sampling circuit, with the Shannon's theorems is that the basis is converted to digital signal with its quantification, utilize the microprocessor management of computing unit of corresponding measurement algorithm and MCF51EM256 chip, hardware multiplier modules etc. are to the electric current after quantizing, voltage signal is handled in real time, and the function of measuring of mainly finishing comprises: current effective value calculates, voltage effective value calculates, active power is calculated, reactive power is calculated, tangible power calculation, power factor (PF) is calculated, mains frequency calculates, the current/voltage phase angle calculates, active energy accumulative total, reactive energy accumulative total, meritorious pulse output, idle pulse output etc.
Above embodiment only is fully open unrestricted the utility model, replaces or the non-creativeness means should belong to the scope that the utility model discloses based on being equal to of above embodiment.
Claims (3)
1. a three-phase SOC intelligent electric meter is characterized in that: comprise MCF51EM256 chip and the battery feed circuit, Power Management Unit, current/voltage simulating signal sampling circuit, communicating circuit, battery and power-fail detection circuit, external data memory, crystal oscillating circuit, display circuit, key circuit, warning circuit and the imput output circuit that cooperate with this chip.
2. three-phase SOC intelligent electric meter according to claim 1 is characterized in that described communicating circuit comprises 485 communicating circuits, infrared communication circuit.
3. three-phase SOC intelligent electric meter according to claim 1 is characterized in that, described external data memory comprises Flash type and Eeprom type storer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010205232233U CN202075342U (en) | 2010-09-08 | 2010-09-08 | Three-phase SOC (system-on-chip) intelligent power meter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010205232233U CN202075342U (en) | 2010-09-08 | 2010-09-08 | Three-phase SOC (system-on-chip) intelligent power meter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202075342U true CN202075342U (en) | 2011-12-14 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
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| CN2010205232233U Expired - Lifetime CN202075342U (en) | 2010-09-08 | 2010-09-08 | Three-phase SOC (system-on-chip) intelligent power meter |
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| CN (1) | CN202075342U (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102981047A (en) * | 2012-12-20 | 2013-03-20 | 贝克电气（江苏）有限公司 | Multifunctional digital meter |
| CN104569570A (en) * | 2015-01-30 | 2015-04-29 | 杨建国 | Power utility parameter sensor and implementing method thereof |
| CN104793049A (en) * | 2015-04-13 | 2015-07-22 | 武汉大学 | Digital power meter |
| CN105954574A (en) * | 2016-07-22 | 2016-09-21 | 安徽亚辉电气自动化有限公司 | Measurement and control system for switch cabinet zero-sequence current |
| CN106771426A (en) * | 2016-12-09 | 2017-05-31 | 深圳市深电能售电有限公司 | A kind of electric data metering terminal for deep electric energy Electric Load Prediction System |
-
2010
- 2010-09-08 CN CN2010205232233U patent/CN202075342U/en not_active Expired - Lifetime
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102981047A (en) * | 2012-12-20 | 2013-03-20 | 贝克电气（江苏）有限公司 | Multifunctional digital meter |
| CN104569570A (en) * | 2015-01-30 | 2015-04-29 | 杨建国 | Power utility parameter sensor and implementing method thereof |
| CN104793049A (en) * | 2015-04-13 | 2015-07-22 | 武汉大学 | Digital power meter |
| CN105954574A (en) * | 2016-07-22 | 2016-09-21 | 安徽亚辉电气自动化有限公司 | Measurement and control system for switch cabinet zero-sequence current |
| CN106771426A (en) * | 2016-12-09 | 2017-05-31 | 深圳市深电能售电有限公司 | A kind of electric data metering terminal for deep electric energy Electric Load Prediction System |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20111214 |