CN204807638U - Multi -functional socket formula electric energy measurement appearance - Google Patents

Abstract

The utility model provides a multi -functional socket formula electric energy measurement appearance comprises current -voltage sampling circuit, electric energy metering circuit, single chip circuit, LCD display circuit and power supply circuit, and its relation of connection is shown like the figure. The resistance sampling is all used in the electric current of electric energy measurement appearance and the sampling of voltage, utilizes the virtual value of active power, electric current and the voltage of the single -phase electric energy chip sensing lead of HLW8012, uses the AT89C2051 singlechip and controls and data processing, adopts LCD1602 LCD to show the measured value. On will inserting the socket of multi -functional electric energy measurement appearance with the power plug of electrical apparatus, can measure the virtual value with active power, electric current and the voltage of electrical apparatus, self power consumptive 1W that is lighter than, the biggest load current is 10A. Its positive effect lies in: the circuit is simple, small, light in weight, with low costs, easy operation, convenient to use, and sensitivity is high, the consumption is little, the precision is high.

Description

A kind of Multifunctional inserting A seating power meter

Technical field

The utility model relates to electric energy measurement technical field, is specifically related to a kind of Multifunctional inserting A seating power meter.

Background technology

Along with improving constantly of economic development and people's living standard, household electrical appliance get more and more, and the thing followed is then the increase of the electricity charge.Environmental protection, low-carbon economy, scientific development, more require people's economize energy, therefore, the power consumption of many families to household electrical appliance is attached great importance to, the multifunctional electric energy measuring instrument of the power, electric current and the line voltage that need the simple and quick measurement electrical appliance of a kind of energy to consume.In the market for the multifunctional electric energy measuring instrument of professional electric energy measurement, price is high, and ordinarily resident family is difficult to accept.

Summary of the invention

For solving the deficiency of existing multifunctional electric energy measuring instrument, the utility model discloses a kind of Multifunctional inserting A seating power meter.The electric current of this Multifunctional inserting A seating power meter and the sampling of voltage all use resistance sampling, utilize the effective value of the active power of HLW8012 single-phase electric energy computation chip sensing lead, electric current and voltage, application AT89C2051 single-chip microcomputer carries out controlling and data processing, adopt LCD1602 liquid crystal display display measurement value, use non-isolated+5V Switching Power Supply to power.The maximum load current of power meter is 10A, the attaching plug of electrical appliance is inserted on the socket of this multifunctional electric energy measuring instrument, the effective value of the active power of electrical appliance, electric current and voltage can be measured, simple to operate, easy to use, measurement highly sensitive, power consumption is little, precision is high.

For achieving the above object, the utility model adopts following technical scheme: a kind of Multifunctional inserting A seating power meter, is made up of current-voltage sampling circuit, ic for energy metering, single chip circuit, LCD display circuit and power circuit.Current-voltage sampling circuit is made up of resistance R1 ~ R8 and electric capacity C1, C2, C3.Ic for energy metering is made up of integrated circuit (IC) chip HLW8012 and electric capacity C4.Single chip circuit is by AT89C2051 single-chip microcomputer, and resistance R9, electric capacity C5 ~ C8, button K1 and crystal oscillator X1 form.LCD display circuit is made up of LCD1602 liquid crystal display and potentiometer RP1.Power circuit is by integrated circuit (IC) chip LNK304, and resistance R10 ~ R13, electric capacity C9 ~ C12, inductance L 1 and diode D1, D2, D3 form.

Good effect of the present utility model is: circuit is simple, volume is little, lightweight, cost is low, simple to operate, easy to use, highly sensitive, power consumption is little, precision is high.

Accompanying drawing explanation

Fig. 1 is block diagram of the present utility model.

Fig. 2 is current-voltage sampling circuit of the present utility model.

Fig. 3 is ic for energy metering of the present utility model.

Fig. 4 is single-chip microcomputer of the present utility model and LCD display circuit.

Fig. 5 is power circuit of the present utility model.

Embodiment

As shown in Figure 1, the utility model is made up of current-voltage sampling circuit, ic for energy metering, single chip circuit, LCD display circuit and power circuit.The output terminal of the current-voltage sampling input termination current-voltage sampling circuit of ic for energy metering, output current/voltage that output current/voltage selects input end to connect single-chip microcomputer selects output control terminal, and output terminal connects the input end of single chip circuit; The display driver of single chip circuit exports the driving input end of termination LCD display circuit; The power end of the output termination ic for energy metering of power circuit, single chip circuit and LCD display circuit.

As shown in Figure 2, current-voltage sampling circuit is made up of resistance R1 ~ R8 and electric capacity C1, C2, C3.The tie point of resistance R1 and R2 one end connects load, the live wire of another termination electric main of load; The tie point ground connection of R3 one end and the R1 other end, and connect the zero line of electric main; The other end of R2 and one end of C1 are connected to the output terminal V1P of current sample, are connected with the 2 pin V1P of the THLW8012 of ic for energy metering; The other end of R3 and one end of C2 are connected to the output terminal V1N of current sample, are connected with the 3 pin V1N of THLW8012; The other end of C1 and C2 is connected and ground connection.R4, R5, R6, R7 connect, the live wire of another termination electric main of R4, one end ground connection of R8 and C3 parallel connection, and the other end in parallel and the other end of R7 are connected to the output terminal V2P of voltage sample, meet the 4 pin voltage sample input end V2P of THLW8012.

The sampling of electric current, voltage has resistance sampling and mutual inductor sample two kinds of modes, and the volume of mutual inductor sample mode is large, cost is high, and electric current of the present utility model and voltage sample all adopt resistance sampling mode.Load current flows through resistance R1, through R2, C1 and R3, C2 capacitance-resistance filter, converts current signal to voltage signal.Current sampling resistor R1 is designed to the copper-manganese resistance of 0.002 Ω/2W, and maximum load current is 10A.Voltage sample utilizes resistance R4 ~ R8 series connection dividing potential drop, line voltage is down to about 100mV and samples.The resistance value of resistance R4 ~ R7 is all designed to 470K Ω, and the resistance value of R8 is 1K Ω, is practically applicable to the voltage sample to 220V electric main.

As shown in Figure 3, ic for energy metering is made up of integrated circuit (IC) chip HLW8012 and electric capacity C4.1 pin of THLW8012 connects one end of+5V power supply and C4, the other end ground connection of C4; 2 pin meet the output terminal V1P of current-voltage sampling circuit; 3 pin meet the output terminal V1N of current-voltage sampling circuit; 4 pin meet the output terminal V2P of current-voltage sampling circuit; 5 pin ground connection; 6,7,8 pin connect 6,8,9 pin of the AT89C2051 of single chip circuit respectively.

HLW8012 is the single-phase electric energy computation chip that Shenzhen makes a concerted effort for scientific & technical corporation releases, and can measure active power, current effective value and voltage effective value.Adopt CMOS technology, SOP8 encapsulates, and built-in crystal oscillator, 2.43V voltage reference source and power supply supervisory circuit ,+5V single power supply, power consumption during work is no more than 15mW.The square wave of the high-frequency impulse CF exported to be dutycycle be 1:1, by measuring the frequency computation part active power of the high-frequency impulse that CF pin exports, precision is ± 0.3%.The square wave of the high-frequency impulse CF1 exported to be dutycycle be 1:1, by measuring frequency computation part current effective value or the voltage effective value of the high-frequency impulse that CF1 pin exports, use SEL to select, precision is ± 0.5%.When SEL is high level, the pulsed frequency that CF1 exports represents voltage effective value, and when SEL is low level, the pulsed frequency that CF1 exports represents current effective value.

As shown in Figure 4, single chip circuit is by AT89C2051 single-chip microcomputer, and resistance R9, electric capacity C5 ~ C8, button K1 and crystal oscillator X1 form.1 pin of AT89C2051 connects the tie point of R9 one end and C7 negative pole, 2,3,7 pin connect 6,5,4 pin of LCD1602 respectively, 4 pin connect the tie point of crystal oscillator X1 one end and electric capacity C6 one end, 5 pin connect the tie point of the crystal oscillator X1 other end and electric capacity C5 one end, 6,8,9 pin connect 6,7,8 pin of HLW8012 respectively, the other end all ground connection of 10 pin and R9, C5, C6, C8, K1,11 pin connect one end of K1,12 ~ 19 pin connect 14 ~ 7 pin of LCD1602 respectively, the positive pole of 20 pin, C7 and C8 one end all connect+5V power supply.

AT89C2051 is low-voltage, high-performance CMOS 8 single-chip microcomputers that atmel corp produces.1 pin of AT89C2051 is reset terminal, and R9, C7 form the reset circuit of single-chip microcomputer.4 pin, the 5 pin internal circuits of AT89C2051 form clock oscillation circuit with outside crystal oscillator X1 and electric capacity C5, C6.The frequency of the high-frequency impulse that AT89C2051 is exported by CF and the CF1 pin measuring electric energy computation chip HLW8012 calculates the effective value of active power, electric current and voltage, and drives LCD1602 display measurement value.During single-chip microcomputer electrification reset, measurement be active power, pressing button K1, the measurement of selection current effective value capable of circulation, voltage effective value and active power.

As shown in Figure 4, LCD display circuit is made up of LCD1602 liquid crystal display and potentiometer RP1.The 1 pin ground connection of the LCD1602 of LCD display circuit, 2 pin connect+5V power supply, and 3 pin connect the sliding end of potentiometer RP1, one termination+5V the power supply of RP1, other end ground connection, 4,5,6 pin of LCD1602 connect 7,3,2 pin of AT89C2051 respectively, and 7 ~ 14 pin connect 19 ~ 12 pin of AT89C2051 respectively.Potentiometer RP1 is for regulating the contrast of character.

As shown in Figure 5, power circuit is by integrated circuit (IC) chip LNK304, and resistance R10 ~ R13, electric capacity C9 ~ C12, inductance L 1 and diode D1, D2, D3 form.1 pin of LNK304 connects one end of C10, 2 pin and R11, one end of R12 is connected, 4 pin are connected with the positive pole of C9 with the negative pole of D1, 5, 6, 7, 8 pin, one end of L1, the negative pole of C11, the negative pole of D2, the other end of C10, the other end of R11 is connected, the positive pole of C11, the other end of R12, the negative pole of D3 is connected, one end of R10 is connected with the positive pole of D1, the live wire of another termination electric main of R10, the other end of L1, the positive pole of D3, the positive pole of C12, one end of R13 is connected for+5V the output terminal of power supply, the negative pole of C9, the positive pole of D2, the negative pole of C12, the other end all ground connection of R13, and connect the zero line of electric main.In order to coordinate the resistance non-isolated sample mode of electric current, voltage, power circuit is necessary for non-isolated power supply, the utility model sampling non-isolated+5V Switching Power Supply.

The Multifunctional inserting A seating power meter of the utility model design, operating voltage is the electric main of 220V, and self power consumption is less than 1W, and maximum load current is 10A, measure the error of active power to be less than ± 0.5%, the error measuring electric current and voltage effective value is less than ± and 0.3%.Circuit is simple, volume is little, lightweight, cost is low, highly sensitive, power consumption is little, precision is high, low price, simple to operate, easy to use, has wide market outlook.

Claims (6)

1. a Multifunctional inserting A seating power meter, is characterized in that: a kind of Multifunctional inserting A seating power meter, is made up of current-voltage sampling circuit, ic for energy metering, single chip circuit, LCD display circuit and power circuit; Current-voltage sampling circuit is made up of resistance R1 ~ R8 and electric capacity C1, C2, C3; Ic for energy metering is made up of integrated circuit (IC) chip HLW8012 and electric capacity C4; Single chip circuit is by AT89C2051 single-chip microcomputer, and resistance R9, electric capacity C5 ~ C8, button K1 and crystal oscillator X1 form; LCD display circuit is made up of LCD1602 liquid crystal display and potentiometer RP1; Power circuit is by integrated circuit (IC) chip LNK304, and resistance R10 ~ R13, electric capacity C9 ~ C12, inductance L 1 and diode D1, D2, D3 form.

2. a kind of Multifunctional inserting A seating power meter according to claim 1, is characterized in that: the resistance R1 of current-voltage sampling circuit and the tie point of R2 one end connect load, the live wire of another termination electric main of load; The tie point ground connection of R3 one end and the R1 other end, and connect the zero line of electric main; The other end of R2 and one end of C1 are connected to the output terminal V1P of current sample, are connected with the 2 pin V1P of the THLW8012 of ic for energy metering; The other end of R3 and one end of C2 are connected to the output terminal V1N of current sample, are connected with the 3 pin V1N of THLW8012; The other end of C1 and C2 is connected and ground connection; R4, R5, R6, R7 connect, the live wire of another termination electric main of R4, one end ground connection of R8 and C3 parallel connection, and the other end in parallel and the other end of R7 are connected to the output terminal V2P of voltage sample, meet the 4 pin voltage sample input end V2P of THLW8012; Current sampling resistor R1 is designed to the copper-manganese resistance of 0.002 Ω/2W, and maximum load current is 10A; The resistance value of voltage sample resistance R4 ~ R7 is all designed to 470K Ω, and the resistance value of R8 is 1K Ω, is practically applicable to the voltage sample to 220V electric main.

3. a kind of Multifunctional inserting A seating power meter according to claim 1, is characterized in that: 1 pin of the THLW8012 of ic for energy metering connects one end of+5V power supply and C4, the other end ground connection of C4; 2 pin meet the output terminal V1P of current-voltage sampling circuit; 3 pin meet the output terminal V1N of current-voltage sampling circuit; 4 pin meet the output terminal V2P of current-voltage sampling circuit; 5 pin ground connection; 6,7,8 pin connect 6,8,9 pin of the AT89C2051 of single chip circuit respectively.

4. a kind of Multifunctional inserting A seating power meter according to claim 1, it is characterized in that: 1 pin of the AT89C2051 of single chip circuit connects the tie point of R9 one end and C7 negative pole, 2,3,7 pin connect 6,5,4 pin of LCD1602 respectively, 4 pin connect the tie point of crystal oscillator X1 one end and electric capacity C6 one end, 5 pin connect the tie point of the crystal oscillator X1 other end and electric capacity C5 one end, the other end all ground connection of 10 pin and R9, C5, C6, C8, K1,11 pin connect one end of K1,12 ~ 19 pin connect 14 ~ 7 pin of LCD1602 respectively, the positive pole of 20 pin, C7 and C8 one end all connect+5V power supply.

5. a kind of Multifunctional inserting A seating power meter according to claim 1, it is characterized in that: the 1 pin ground connection of the LCD1602 of LCD display circuit, 2 pin connect+5V power supply, and 3 pin connect the sliding end of potentiometer RP1, a termination power positive end of RP1, other end ground connection.

6. a kind of Multifunctional inserting A seating power meter according to claim 1, it is characterized in that: 1 pin of the LNK304 of power circuit connects one end of C10, 2 pin and R11, one end of R12 is connected, 4 pin are connected with the positive pole of C9 with the negative pole of D1, 5, 6, 7, 8 pin, one end of L1, the negative pole of C11, the negative pole of D2, the other end of C10, the other end of R11 is connected, the positive pole of C11, the other end of R12, the negative pole of D3 is connected, one end of R10 is connected with the positive pole of D1, the live wire of another termination electric main of R10, the other end of L1, the positive pole of D3, the positive pole of C12, one end of R13 is connected for+5V the output terminal of power supply, the negative pole of C9, the positive pole of D2, the negative pole of C12, the other end all ground connection of R13, and connect the zero line of electric main.