CN202119833U - Single-phase remote cost control intelligent electric energy meter - Google Patents

Abstract

The utility model relates to a single-phase remote cost control intelligent electric energy meter which includes a current sampling circuit and a voltage sampling circuit. A current signal and a voltage signal are input into a metering chip. The metering chip is provided inside with a sampling module, a hardware multiplier, and a pulse output module. A voltage value, a current value, and a reverse electric quantity acquired by the metering chip are input into a micro control unit via an SPI interface. The input terminal of the micro control unit is connected with a communication module, a display module, a storage module, and a control module respectively. The control module includes a tripping power-off unit and an embedded safe control module. The input terminal of the tripping power-off unit is connected with the output terminal of the micro control unit. The electric energy meter also includes a power supply module and a clock circuit providing a clock signal for the micro control unit. The single-phase remote cost control intelligent electric energy meter satisfies the standards of the intelligent electric energy meter series of the state grid corporation, and has the advantages of high safety and low cost.

Description

The single-phase long-range control intelligent electric energy meter that takes

Technical field

The utility model relates to a kind of single-phase long-range expense control intelligent electric energy meter.

Technical background

In recent years, the construction of " strong intelligent grid " was actively carried out by State Grid Corporation of China, and intelligent electric meter is as the nucleus equipment of intelligent grid, and the growth that will dispose along with intelligent grid appears and increases the impetus rapidly.

09 year; State Grid Corporation of China is on the basis of " measure, check meter and expenses standard construction research " project achievement; General requirement according to unified strong intelligent grid construction; Produce, manage, manage the basic demand to electric energy meter in conjunction with domestic and international metering, communication technology present situation and system of company, State Grid Corporation of China's tissue has been worked out the intelligent electric energy meter series standard.

The utility model content

For adapting to the intelligent electric energy meter series standard of State Grid Corporation of China, it is a kind of safe that the utility model provides, the single-phase long-range control intelligent electric energy meter that takes with low cost.

The single-phase long-range control intelligent electric energy meter that takes; Comprise the current sampling circuit of gathering current signal and the voltage sampling circuit of gathering voltage signal; Described current signal and voltage signal input computation chip; Be provided with in the described computation chip current signal and voltage signal are carried out the sampling module that the AD sampling obtains current value and magnitude of voltage; With being multiplied each other, magnitude of voltage and current value obtain the hardware multiplier of performance number, and with the pulse output module of performance number with the form output of pulse;

The magnitude of voltage that described computation chip obtains, current value and reverse electric weight can be the micro-control unit (MCU of electric weight with the pulses switch of computation chip output through the input of SPI interface; Micro Control Unit) in, the input end of described micro-control unit is connected with communication module, display module, memory module and control module respectively;

Described control module comprises when the user tripping operation outage unit that electricity charge time tripping operation less than drawing lock threshold value, the electricity charge that prestore close a floodgate during greater than drawing lock threshold value that prestores; With the embedded-type security control module (ESAM, Embedded Secure Access Module) that information security is encrypted; The input end of described tripping operation outage unit is connected with the output terminal of described micro-control unit;

Described electric energy meter also comprises power module and the clock circuit of clock signal is provided for micro-control unit.

Further, described communication module comprises infrared communication unit and 485 communication units; Described display module comprises the LCD display unit that shows various electric weight, voltage, electric current, time, address and table number and shows meritorious pulse, the LED indicating member with warning message of operating a switch;

Described memory module comprises the EEPROM storage unit; The input end of all unit is connected with the output terminal of micro-control unit respectively.

Further, described power module is included as the primary power of computation chip and micro-control unit power supply and is the auxiliary power of 485 communication units power supply.

The technical conceive of the utility model is: utilize current sampling circuit to gather current signal, utilize voltage sampling circuit to gather voltage signal, through the calculating of 8209 computation chips; Computation chip carries out the AD sampling to signal; Obtain magnitude of voltage and current value, pass through the hardware multiplier in the computation chip simultaneously, voltage and current is multiplied each other obtains power; And with the form of pulse power is exported, the speed of pulse has been represented the size of power; Computing chip with relevant voltage, electric current, reverse electric weight, power, etc. signal be transferred on the MCU through the SPI line, handle; Under the forward electric weight situation, the waveform of voltage should be identical with the waveform of electric current, and under the reverse electric weight situation, the waveform of voltage and electric current is opposite, and the forward electric weight can measure with reverse electric quantity metering chip voluntarily.MCU will need data presented to show through display module; Through infrared communication unit or 485 communication units electric energy meter is communicated simultaneously; Drawing lock module then can be controlled user's electricity consumption.

This circuit board adopted ultra-large digital signal processing chip, forever preserve the memory of information, full isolation standard RS485 communication interface, infrared communication and communicate by letter, the big wide temperature liquid crystal display of picture and information security encrypt advanced technologies such as ESAM module.This circuit board integrates numerous functions; Have functions such as electrical energy metering, information stores and processing, monitoring in real time, control automatically, information interaction; Can stop the arrearage behavior effectively, effectively in time the user carried out modernized requirement of scientific management thereby complied with power department.

The utlity model has the intelligent electric energy meter series standard that can adapt to State Grid Corporation of China, safe, with low cost advantage.

Description of drawings

Fig. 1 is the theory diagram of the utility model.

Embodiment

With reference to accompanying drawing, further specify the utility model:

The single-phase long-range control intelligent electric energy meter that takes; Comprise the current sampling circuit 1 of gathering current signal and the voltage sampling circuit 2 of gathering voltage signal; Described current signal and voltage signal input computation chip 3; Be provided with in the described computation chip 3 current signal and voltage signal are carried out the sampling module that the AD sampling obtains current value and magnitude of voltage; With being multiplied each other, magnitude of voltage and current value obtain the hardware multiplier of performance number, and with the pulse output module of performance number with the form output of pulse;

The magnitude of voltage that described computation chip 3 obtains, current value and reverse electric weight can be the micro-control unit (MCU of electric weight with the pulses switch of computation chip output through the input of SPI interface; Micro Control Unit) in 4, the input end of described micro-control unit 4 is connected with communication module, display module, memory module and control module respectively;

Described control module comprises when the user tripping operation outage unit 11 that electricity charge time tripping operation less than drawing lock threshold value, the electricity charge that prestore close a floodgate during greater than drawing lock threshold value that prestores; With the embedded-type security control module (ESAM, Embedded Secure Access Module) that information security is encrypted; The input end of described tripping operation outage unit 11 is connected with the output terminal of described micro-control unit 4;

Described electric energy meter also comprises power module and is the clock circuit 7 that micro-control unit 4 provides clock signal.

Described communication module comprises infrared communication unit 9 and 485 communication units 8; Described display module comprises the LCD display unit 13 that shows various electric weight, voltage, electric current, time, address and table number and shows meritorious pulse; Operate a switch LED indicating member 12 with warning message, described memory module comprises EEPROM storage unit 14; The input end of all unit is connected with the output terminal of micro-control unit 4 respectively.

Described power module is included as the primary power 5 of computation chip and micro-control unit power supply and is the auxiliary power 6 of 485 communication units, 8 power supplies.

The technical conceive of the utility model is: utilize current sampling circuit to gather current signal, utilize voltage sampling circuit to gather voltage signal, through the calculating of 8209 computation chips; Computation chip carries out the AD sampling to signal; Obtain magnitude of voltage and current value, pass through the hardware multiplier in the computation chip simultaneously, voltage and current is multiplied each other obtains power; And with the form of pulse power is exported, the speed of pulse has been represented the size of power; Computing chip with relevant voltage, electric current, reverse electric weight, power, etc. signal be transferred on the MCU through the SPI line, handle; Under the forward electric weight situation, the waveform of voltage should be identical with the waveform of electric current, and under the reverse electric weight situation, the waveform of voltage and electric current is opposite, and the forward electric weight can measure with reverse electric quantity metering chip voluntarily.MCU will need data presented to show through display module; Through infrared communication unit or 485 communication units electric energy meter is communicated simultaneously; Drawing lock module then can be controlled user's electricity consumption.

This circuit board adopted ultra-large digital signal processing chip, forever preserve the memory of information, full isolation standard RS485 communication interface, infrared communication and communicate by letter, the big wide temperature liquid crystal display of picture and information security encrypt advanced technologies such as ESAM module.This circuit board integrates numerous functions; Have functions such as electrical energy metering, information stores and processing, monitoring in real time, control automatically, information interaction; Can stop the arrearage behavior effectively, effectively in time the user carried out modernized requirement of scientific management thereby complied with power department.

The utlity model has the intelligent electric energy meter series standard that can adapt to State Grid Corporation of China, safe, with low cost advantage.

The described content of this instructions embodiment only is enumerating the way of realization of utility model design; The protection domain of the utility model should not be regarded as and only limit to the concrete form that embodiment states, the protection domain of the utility model also reach in those skilled in the art according to the utility model design the equivalent technologies means that can expect.

Claims (3)

1. the single-phase long-range control intelligent electric energy meter that takes; It is characterized in that: comprise the current sampling circuit of gathering current signal and the voltage sampling circuit of gathering voltage signal; Described current signal and voltage signal input computation chip; Be provided with in the described computation chip current signal and voltage signal are carried out the sampling module that the AD sampling obtains current value and magnitude of voltage; With being multiplied each other, magnitude of voltage and current value obtain the hardware multiplier of performance number, and with the pulse output module of performance number with the form output of pulse;

The magnitude of voltage that described computation chip obtains, current value and reverse electric weight can be in the micro-control unit of electric weight with the pulses switch of computation chip output through the input of SPI interface, and the input end of described micro-control unit is connected with communication module, display module, memory module and control module respectively;

Described control module comprises prestore tripping operation outage unit that electricity charge time tripping operation less than drawing lock threshold value, the electricity charge that prestore close a floodgate during greater than drawing lock threshold value and the embedded-type security control module that information security is encrypted as the user; The input end of described tripping operation outage unit is connected with the output terminal of described micro-control unit;

Described electric energy meter also comprises power module and the clock circuit of clock signal is provided for micro-control unit.

2. the single-phase long-range control intelligent electric energy meter that takes as claimed in claim 1, it is characterized in that: described communication module comprises infrared communication unit and 485 communication units; Described display module comprises the LCD display unit that shows various electric weight, voltage, electric current, time, address and table number and shows meritorious pulse, the LED indicating member with warning message of operating a switch;

Described memory module comprises the EEPROM storage unit; The input end of all unit is connected with the output terminal of micro-control unit respectively.

3. the single-phase long-range control intelligent electric energy meter that takes as claimed in claim 2 is characterized in that: described power module is included as the primary power of computation chip and micro-control unit power supply and is the auxiliary power of 485 communication units power supply.