CN103513222B - Ammeter rapid stealing detecting instrument - Google Patents
Ammeter rapid stealing detecting instrument Download PDFInfo
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- CN103513222B CN103513222B CN201310480554.1A CN201310480554A CN103513222B CN 103513222 B CN103513222 B CN 103513222B CN 201310480554 A CN201310480554 A CN 201310480554A CN 103513222 B CN103513222 B CN 103513222B
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Abstract
The invention discloses an ammeter rapid stealing detecting instrument which comprises a host casing body, a clamp meter and a work circuit board. A liquid crystal screen observation window is arranged on the host casing body. The clamp meter is composed of a clamp head casing body and an iron core. The work circuit board is arranged in the host casing body. The ammeter rapid stealing detecting instrument is characterized in that the work circuit board comprises a main control CPU, a front-end signal conditioning circuit, a keyboard circuit, a voice circuit, a power supply circuit and an LCD liquid crystal interface circuit. The ammeter rapid stealing detecting instrument provided by the invention has the advantages that the stealing detecting instrument is suitable for a field mini hand-held electric measurement instrument, and has the advantages of convenient carrying, easy wiring, accurate measurement data, simple operation, simple circuit structure, simple data calculation process in the circuit and rapid calculation speed; and the stealing detecting instrument is less susceptible to interference when signal acquisition is carried out, can rapidly determine whether an ammeter is normal and whether the behavior of electricity stealing occurs, gives out a beautiful voice prompt, is humanized and is easy to use.
Description
Technical field
The present invention relates to a kind of ammeter stealing detecting instrument, particularly a kind of ammeter rapid stealing detecting instrument, it is adaptable to in-site measurement electric energy
Table electrical quantity, so as to judge that electric energy meter is whether normal, has, without electricity filching behavior.
Background technology
At present, existing electric energy meter field looks into surreptitiously equipment and mostly adopts the separate structure of main frame and split-core type meter, split-core type meter and main frame
Very long line must be passed through to connect, thus, this structure to look into surreptitiously equipment wiring loaded down with trivial details, and be easily subject to when gathering signal dry
Disturb, complex operation, measurement data is inaccurate, uses very inconvenient.In addition, though also having split-core type meter and the host complexes to be now
The electric energy meter stealing detecting instrument of one, but its circuit structure is all more complicated, and circuit internal data calculating process is also very numerous and diverse, calculates
Speed is slower；Therefore, safeguard cumbersome, be also not easy to rapid stealing detecting electricity.
The content of the invention
The purpose of the present invention is：Design the ammeter rapid stealing detecting instrument that a kind of split-core type meter and host complexes are integrated, the stealing detecting instrument
It is the Miniature hand-held electric measuring instrument suitable for scene, is easy to carry, wiring easily, during collection signal interference is not easily susceptible to, and is surveyed
Amount data are accurate, simple to operate, and circuit structure is simple, and circuit internal data calculating process is simple, and calculating speed is fast, can
Quickly judge that electric energy meter is whether normal, have, without electricity filching behavior, use easier.
The purpose of the present invention can be realized by following technical proposals：
This ammeter rapid stealing detecting instrument, including host shell, split-core type meter and operating circuit plate, described host shell is provided with liquid
Crystalline substance screen observation window, described split-core type meter is made up of binding clip housing and iron core, and described operating circuit plate is arranged in host shell, its
It is characterized in that：Master cpu, analog signal processing, keyboard circuit, sound circuit, electricity are included on described operating circuit plate
Source circuit and LCD liquid crystal interface circuits, have microcontroller U5, on outer clock circuit, pull down resistor R17, CPU in master cpu
Reset circuit, cpu power VCC decoupling capacitances, polarized electric capacity E5, AD interface analog power filter circuit and 0 Europe resistance
R21, wherein, model STM32F100CBT6 of microcontroller U5, have in outer clock circuit 8M crystal oscillators Y1 and electric capacity C7 and
There is resistance R18 and electric capacity C9 in C8, CPU electrification reset circuit, have electric capacity C10, C11 and C12 in cpu power VCC decoupling capacitances,
There are inductance L2, electric capacity C13 and polarized electric capacity E6 in AD interface analog power filter circuits；Have four in analog signal processing
Voltage follower U2A, U2C and U2D, alternating current sampling input terminal P1 in passage high precision operating amplifier, alternating current
Pressure input terminal P2, resistance R1, R3～R10 and R12, electric capacity C1～C3 and clamp diode D1 and D3～D5, its four-way
Model SGM8554 of high precision operating amplifier, the model of clamp diode D1 and D3～D5 is IN4148；Keyboard circuit
Inside there are control button KEY1 and KEY2 and resistance R11 and R13；There are audio frequency power amplifier chip U3, polarized electric capacity in sound circuit
E3 and E4, electric capacity C4 and C5, resistance R14 and R15 and loudspeaker SP1, model SGM4890YMS of its audio frequency power amplifier chip U3；
There are battery BT1, regulator U1, polarized electric capacity E1 and E2, diode D2, inductance L1, resistance R2 in power circuit
And toggle switch S1, model LM2596S-3.3 of its regulator U1, the model of diode D2
STPS2L25U, model DO3316P-104 of inductance L1, the model SW DIP-6 of toggle switch S1；LCD liquid crystal interfaces electricity
There are lcd driver U4, resistance R16, electric capacity C6 and 47 segment numeral LCD liquid crystal display DS1, the model of its lcd driver U4 in road
For HT1621B, model GDC8310 of 47 segment numeral LCD liquid crystal display DS1；
Its annexation is：In master cpu, the 1st pin of microcontroller U5 connects the 3.3V produced by power circuit
The mutual short circuit of the pin of 23rd, the 35th and the 47th of DC voltage VCC3.3, microcontroller U5 is followed by digitally, outer clock circuit
The two ends of crystal oscillator Y1 are connected respectively to the 5th and the 6th pin of microcontroller U5, and digitally, its is another for a termination of pull down resistor R17
One end is connected to the 44th pin of microcontroller U5, and one end of resistance R18 and electric capacity C9 is all connected in CPU electrification reset circuits
7th pin of microcontroller U5, the other end connection 3.3V DC voltage VCC3.3 of resistance R18, another termination number of electric capacity C9
Word ground, one end of electric capacity C10, C11 and C12 is connected respectively to the 24th of microcontroller U5 the, the in cpu power VCC decoupling capacitances
36 and the 48th pin, its other end connects digitally, the positive pole connection 3.3V DC voltage VCC3.3 of polarized electric capacity E5, and together
When be connected with the pin of the 24th, the 36th and the 48th of microcontroller U5, the negative pole of polarized electric capacity E5 connects digitally, AD interface moulds
Intend one end connection 3.3V DC voltage VCC3.3 of electric source filter circuit internal inductance L2, the other end of inductance L2 is connected to microcontroller
9th pin of device U5, and analog power voltage signal AVCC is drawn, one end of electric capacity C13 is connected with the positive pole of polar capacitor E6,
And while connect the other end of inductance L2, the other end of electric capacity C13 and the negative pole of polarized electric capacity E6 are all connected to microcontroller
8th pin of U5,0 Europe resistance R21 for digitally with simulation ground single-point connection resistance, its one end is connected to the of microcontroller U5
8 pins, its another termination is digitally；In analog signal processing, the voltage in four-way high precision operating amplifier with
It is all connected with by the analog power voltage signal AVCC drawn in master cpu with the positive electricity source connection of device U2A, U2C and U2D, its
In, be also associated with electric capacity C2 between the positive electricity source connection of voltage follower U2A and simulation ground, voltage follower U2A, U2C and
The negative electricity source connection of U2D connects simulation ground, and voltage follower U2D and resistance R6 and R9 constitute 1.65V voltage references and produce
Circuit, after one end of resistance R6 is connected with one end of resistance R9, is connected to the inverting input of voltage follower U2D, electricity
The other end connection simulation power supply voltage signal AVCC of resistance R6, another termination simulation ground of resistance R9, voltage follower U2D's is defeated
Go out end to be connected with its in-phase input end, and draw 1.65V voltage reference signal REF, alternating current sampling input terminal P1 connects
Meet the two ends for being wound on enamel-covered wire output line on split-core type meter iron core, the 1st pin connection resistance R3 of alternating current sampling input terminal P1
One end, alternating current sampling input terminal P1 the 2nd pin connection resistance R3 the other end and resistance R4 one end, resistance
The other end connection 1.65V voltage reference signal REF of R4, the positive pole of clamp diode D1 and the negative pole of clamp diode D3 and
After one end of resistance R3 is connected, the in-phase input end of voltage follower U2A, the negative pole connection of clamp diode D1 are connected to
The positive pole of analog power voltage signal AVCC, clamp diode D3 connects simulation ground, and the output end of voltage follower U2A is anti-phase with it
Input is connected, and while connects one end of resistance R1, the other end of resistance R1 connects one end of electric capacity C1, and electric capacity C1's is another
One termination simulation ground, the sub- P2 connections exchange 0～400V power supplys of ac voltage input, the 1st He of the sub- P2 of ac voltage input
2nd pin connects respectively the other end of one end of resistance R5 and resistance R10, resistance R5 and resistance R10 and connects resistance R8's respectively
Two ends, one end of resistance R12 connects one end of resistance R10, and the other end of resistance R12 connects 1.65V voltage reference signal REF,
After the positive pole of clamp diode D4 is connected with the negative pole of clamp diode D5 and the other end of resistance R10, electricity is connected to
The in-phase input end of pressure follower U2C, the negative pole connection simulation power supply voltage signal AVCC of clamp diode D4, clamp diode
The positive pole of D5 connects simulation ground, and the output end of voltage follower U2C is connected with its inverting input, and while connects resistance R7's
One end, the other end of resistance R7 connects one end of electric capacity C3, another termination simulation ground of electric capacity C3；Analog signal processing with
Between master cpu, the other end of resistance R1 is connected to the 12nd pin of microcontroller U5, and the other end of resistance R7 is connected to micro-control
13rd pin of device U5 processed；In keyboard circuit, the mutual short circuit of the terminal of the 1st, the 2nd, the 4th and the 5th of control button KEY1, control
Connect one end of resistance R11, the other end connection 3.3V DC voltages of resistance R11 after 3rd and the 6th terminal short circuit of button KEY1
VCC3.3, and while connect one end of resistance R13, the other end of resistance R13 connects the 2nd and the 3rd terminal of control button KEY2,
1st and the 4th terminal phase short circuit of control button KEY2；Between keyboard circuit and master cpu, the 5th terminal of control button KEY1
The 32nd pin of microcontroller U5 is connected to, the 1st terminal of control button KEY2 is connected to the 33rd pin of microcontroller U5；
In sound circuit, the 6th pin connection 3.3V DC voltage VCC3.3 of audio frequency power amplifier chip U3, and while it is connected with polar capacitor
The positive pole of E3, the negative pole of polarized electric capacity E3 is connected to the 7th pin of audio frequency power amplifier chip U3, and the 1st of audio frequency power amplifier chip U3 the
Pin connects one end of electric capacity C4, and the other end of electric capacity C4 is connected with the negative pole of polarized electric capacity E4, and connects digitally, there is pole
Property electric capacity E4 positive pole be connected with the 2nd and the 3rd pin of audio frequency power amplifier chip U3, the 4th pin of audio frequency power amplifier chip U3 connects
One end of connecting resistance R14 and resistance R15, the other end of resistance R14 connects one end of electric capacity C5, the other end connection of resistance R15
To the 5th pin of audio frequency power amplifier chip U3, the two ends of loudspeaker SP1 are connected to the 5th and the 8th pin of audio frequency power amplifier chip U3；Language
Between sound circuit and master cpu, the other end of electric capacity C5 is connected to the 14th pin of microcontroller U5, audio frequency power amplifier chip U3's
1st pin connects the 15th pin of microcontroller U5；In power circuit, the 1st pin connection of regulator U1 is dialled
1st terminal of code switch S1, and while the positive pole of polar capacitor E2 is connected with, the negative pole of polarized electric capacity E2 connects battery BT1
Negative pole, and while the 3rd and the 5th pin of connecting valve voltage regulator U1, the 3rd pin of regulator U1 connects number
Word ground, the positive pole of battery BT1 connects the 2nd terminal of toggle switch S1, the 2nd pin connection diode of regulator U1
The negative pole of D2 and one end of inductance L1, the positive pole of diode D2 connects digitally, and while be connected with the negative pole of polar capacitor E1, has
The positive pole of polar capacitor E1 connects the other end of inductance L1, and the other end of inductance L1 produces 3.3V DC voltage VCC3.3, while
The 4th pin of regulator U1 is connected to, after the 5th and the 7th terminal short circuit of toggle switch S1, connects the one of resistance R2
End, the other end of resistance R2 is connected with the other end of inductance L1；Between power circuit and master cpu, the 6th of toggle switch S1 the
With the 42nd and the 43rd pin that the 8th terminal is connected respectively to microcontroller U5；In LCD liquid crystal interface circuits, lcd driver U4
The 8th pin connect resistance R16 one end, resistance R16 the other end connection 3.3V DC voltage VCC3.3, and while connection
9th pin of lcd driver U4 and one end of electric capacity C6, another termination of electric capacity C6 digitally, 47 segment numeral LCD liquid crystal displays
1st～4 pin of DS1 is connected respectively with the 16th～13 pin of lcd driver U4,47 segment numeral LCD liquid crystal display DS1's
5th～13 pin is connected respectively with the 48th～40 pin of lcd driver U4；LCD liquid crystal interfaces circuit and master cpu it
Between, the 1st～4 pin of lcd driver U4 is connected respectively with the pin of the 4th, the 3rd, the 2nd and the 46th of microcontroller U5；
Stealing detecting instrument measurement live wire line current Ia or zero line go out the internal arithmetic process of line current Ib：Input stealing detecting instrument
Interior live wire line current analog signal or zero line outlet current analog signal, on the stealing detecting instrument internal pull-up circuit plate before
After the conditioning of end signal modulate circuit, it is directly inputted in the microcontroller U5 of master cpu 1, Jing microcontrollers U5 inside AD conversion
Afterwards, the transient current sampled value that live wire enters line or zero line outlet is obtained, live wire enters the transient current sampled value of line or zero line outlet
The current effective value that live wire enters line or zero line outlet is calculated through microcontroller U5, that is, measures live wire line current Ia or zero
Line goes out line current Ib；Live wire line current Ia and zero line go out the equal side of line current Ib measure come after, stealing detecting instrument according to it is following judge according to
According to being judged, sound circuit provides corresponding beautiful voice prompting according to judged result；Described basis for estimation is：When
Ia / Ib -1 >When 15%, point out " zero line may disconnect ", as Ia/Ib -1<When 15%, point out " having outside line to access ",
And both the above situation, shows that electric energy table status are abnormal, may there is electricity filching behavior.
In power circuit, battery BT1 is 9V alkaline batteries to the present invention.
In power circuit, toggle switch S1 is rotating disk toggle switch to the present invention.
Between the LCD liquid crystal interfaces circuit and master cpu of the present invention, the 1st～4 pin of lcd driver U4 is logical by SPI
Communication interface is connected respectively with the pin of the 4th, the 3rd, the 2nd and the 46th of microcontroller U5.
It is an advantage of the invention that：1）The stealing detecting instrument is the Miniature hand-held electric measuring instrument suitable for scene, is easy to carry；2）
The design being integrated using split-core type meter and host complexes, and using 32 Cortex-M3 kernel microprocessor controls, circuit structure letter
It is single, do not have a power failure during use, do not change metering electric energy meter circuit connection, as long as entering the live wire that split-core type meter is respectively clamped into electric energy meter
Line and zero line outlet, you can the live wire line current and zero line for measuring electric energy meter circuit goes out line current, and then by stealing detecting instrument master
The quick calculating of control CPU, judges that rapidly electric energy meter is whether normal, has, without electricity filching behavior, is simultaneously emitted by beautiful voice and carries
Show, wiring is easily, simple to operate, circuit internal data calculating process is simple, calculating speed is fast, more humane, uses more
It is easy；3）Split-core type meter wiring is short, can avoid being interfered when gathering signal, and measurement data is more accurate.
Description of the drawings
Fig. 1 is the overall framework figure of operating circuit plate；
Fig. 2 is master cpu schematic diagram；
Fig. 3 is analog signal processing schematic diagram；
Fig. 4 is keyboard circuit schematic diagram；
Fig. 5 is sound circuit schematic diagram；
Fig. 6 is power circuit principle figure；
Fig. 7 is LCD liquid crystal interface circuit theory diagrams.
Specific embodiment
As shown in figs. 1-7, this ammeter rapid stealing detecting instrument, including host shell, split-core type meter and operating circuit plate, described main frame
Housing is provided with liquid crystal display observation window, and described split-core type meter is made up of binding clip housing and iron core, and described operating circuit plate is arranged on
In host shell, it is characterized in that：Master cpu 1, analog signal processing 2, keyboard electricity are included on described operating circuit plate
There are microcontroller U5, external clock electricity in road 3, sound circuit 4, power circuit 5 and LCD liquid crystal interfaces circuit 6, master cpu 1
Road, pull down resistor R17, CPU electrification reset circuit, cpu power VCC decoupling capacitances, polarized electric capacity E5, AD interface analog power
Filter circuit and 0 Europe resistance R21, wherein, model STM32F100CBT6 of microcontroller U5 has 8M in outer clock circuit
There is resistance R18 and electric capacity C9 in crystal oscillator Y1 and electric capacity C7 and C8, CPU electrification reset circuit, in cpu power VCC decoupling capacitances
There are electric capacity C10, C11 and C12, there is inductance L2, electric capacity C13 and polarized electric capacity E6 in AD interface analog power filter circuits；Before
There is voltage follower U2A, U2C and U2D, the alternating current in four-way high precision operating amplifier in end signal modulate circuit 2
Sampling input terminal P1, the sub- P2 of ac voltage input, resistance R1, R3～R10 and R12, electric capacity C1～C3 and the pole of clamper two
Pipe D1 and D3～D5, model SGM8554 of its four-way high precision operating amplifier, the type of clamp diode D1 and D3～D5
Number it is IN4148；There are control button KEY1 and KEY2 and resistance R11 and R13 in keyboard circuit 3；There is sound in sound circuit 4
Frequency power amplifier chips U3, polarized electric capacity E3 and E4, electric capacity C4 and C5, resistance R14 and R15 and loudspeaker SP1, its audio frequency power amplifier core
Model SGM4890YMS of piece U3；Have in power circuit 5 battery BT1, regulator U1, polarized electric capacity E1 and
E2, diode D2, inductance L1, resistance R2 and toggle switch S1, model LM2596S- of its regulator U1
3.3, model STPS2L25U of diode D2, model DO3316P-104 of inductance L1, model SW of toggle switch S1
DIP-6；There are lcd driver U4, resistance R16, electric capacity C6 and 47 segment numeral LCD liquid crystal display DS1 in LCD liquid crystal interfaces circuit 6,
Model HT1621B of its lcd driver U4, model GDC8310 of 47 segment numeral LCD liquid crystal display DS1；
Its annexation is：In master cpu 1, the 1st pin of microcontroller U5 connects what is produced by power circuit 5
The mutual short circuit of the pin of 23rd, the 35th and the 47th of 3.3V DC voltage VCC3.3, microcontroller U5 is followed by digitally, external clock
The two ends of circuit crystal oscillator Y1 are connected respectively to the 5th and the 6th pin of microcontroller U5, and the one of pull down resistor R17 terminates digitally,
Its other end is connected to the 44th pin of microcontroller U5, and one end of resistance R18 and electric capacity C9 connects in CPU electrification reset circuits
It is connected to the 7th pin of microcontroller U5, the other end connection 3.3V DC voltage VCC3.3 of resistance R18, the other end of electric capacity C9
Connect digitally, one end of electric capacity C10, C11 and C12 is connected respectively to the of microcontroller U5 in cpu power VCC decoupling capacitances
24th, the 36th and the 48th pin, its other end connects digitally, the positive pole connection 3.3V DC voltages of polarized electric capacity E5
VCC3.3, and while be connected with the pin of the 24th, the 36th and the 48th of microcontroller U5, the negative pole of polarized electric capacity E5 connects numeral
Ground, one end connection 3.3V DC voltage VCC3.3 of AD interface analog power filter circuit internal inductances L2, the other end of inductance L2
The 9th pin of microcontroller U5 is connected to, and draws analog power voltage signal AVCC, one end connection polarized of electric capacity C13
The positive pole of electric capacity E6, and while connect the other end of inductance L2, the other end of electric capacity C13 and the negative pole of polarized electric capacity E6 connect
The 8th pin of microcontroller U5 is connected to, 0 Europe resistance R21 is digitally to connect resistance with simulation ground single-point, and its one end is connected to micro-
8th pin of controller U5, its another termination is digitally；In analog signal processing 2, four-way high-accuracy arithmetic amplifies
The positive electricity source connection of voltage follower U2A, U2C and U2D in device is all connected with by the analog power electricity drawn in master cpu 1
Pressure signal AVCC, wherein, be also associated with electric capacity C2 between the positive electricity source connection of voltage follower U2A and simulation ground, voltage with
Simulation ground is connect with the negative electricity source connection of device U2A, U2C and U2D, voltage follower U2D and resistance R6 and R9 constitute 1.65V
Voltage reference produces circuit, after one end of resistance R6 is connected with one end of resistance R9, is connected to the anti-of voltage follower U2D
Phase input, resistance R6 the other end connection simulation power supply voltage signal AVCC, resistance R9 another termination simulation ground, voltage with
It is connected with its in-phase input end with the output end of device U2D, and draws 1.65V voltage reference signal REF, alternating current sampling is defeated
Enter the two ends that the connection of terminals P 1 is wound on enamel-covered wire output line on split-core type meter iron core, the 1st pin of alternating current sampling input terminal P1
One end of connection resistance R3, the other end and resistance R4 of the 2nd pin connection resistance R3 of alternating current sampling input terminal P1
One end, resistance R4 the other end connection 1.65V voltage reference signal REF, the positive pole and clamp diode of clamp diode D1
After the negative pole of D3 and one end of resistance R3 are connected, the in-phase input end of voltage follower U2A, clamp diode are connected to
The negative pole connection simulation power supply voltage signal AVCC of D1, the positive pole of clamp diode D3 connects simulation ground, and voltage follower U2A's is defeated
Go out end to be connected with its inverting input, and while connect one end of resistance R1, the other end of resistance R1 connects the one of electric capacity C1
End, another termination simulation ground of electric capacity C1, the sub- P2 connections exchange 0～400V power supplys of ac voltage input, alternating voltage input
1st and the 2nd pin of terminals P 2 connects respectively one end of resistance R5 and resistance R10, the other end difference of resistance R5 and resistance R10
The two ends of connection resistance R8, one end of resistance R12 connects one end of resistance R10, the other end connection 1.65V voltages of resistance R12
Reference signal REF, the positive pole of clamp diode D4 is connected with the other end of the negative pole of clamp diode D5 and resistance R10
Afterwards, the in-phase input end of voltage follower U2C, the negative pole connection simulation power supply voltage signal of clamp diode D4 are connected to
The positive pole of AVCC, clamp diode D5 connects simulation ground, and the output end of voltage follower U2C is connected with its inverting input, and
Connect one end of resistance R7 simultaneously, the other end of resistance R7 connects one end of electric capacity C3, another termination simulation ground of electric capacity C3；Before
Between end signal modulate circuit 2 and master cpu 1, the other end of resistance R1 is connected to the 12nd pin of microcontroller U5, resistance R7
The other end be connected to the 13rd pin of microcontroller U5；In keyboard circuit 3, control button KEY1 the 1st, the 2nd, the 4th and
The mutual short circuit of 5th terminal, connects one end of resistance R11 after the 3rd and the 6th terminal short circuit of control button KEY1, resistance R11's is another
One end connects 3.3V DC voltage VCC3.3, and while connects one end of resistance R13, the other end connection control of resistance R13 is pressed
2nd and the 3rd terminal of key KEY2, the 1st and the 4th terminal phase short circuit of control button KEY2；Keyboard circuit 3 and master cpu 1 it
Between, the 5th terminal of control button KEY1 is connected to the 32nd pin of microcontroller U5, the 1st terminal connection of control button KEY2
To the 33rd pin of microcontroller U5；In sound circuit 4, the 6th pin connection 3.3V DC voltages of audio frequency power amplifier chip U3
VCC3.3, and while the positive pole of polar capacitor E3 is connected with, the negative pole of polarized electric capacity E3 is connected to audio frequency power amplifier chip U3's
7th pin, the 1st pin of audio frequency power amplifier chip U3 connects one end of electric capacity C4, the other end and the polarized electric capacity E4 of electric capacity C4
Negative pole be connected, and connect digitally, the positive pole of polarized electric capacity E4 is connected with the 2nd and the 3rd pin of audio frequency power amplifier chip U3
Connect, the 4th pin of audio frequency power amplifier chip U3 connects one end of resistance R14 and resistance R15, the other end connection electric capacity of resistance R14
One end of C5, the other end of resistance R15 is connected to the 5th pin of audio frequency power amplifier chip U3, and the two ends of loudspeaker SP1 are connected to audio frequency
5th and the 8th pin of power amplifier chips U3；Between sound circuit 4 and master cpu 1, the other end of electric capacity C5 is connected to microcontroller
14th pin of U5, the 1st pin of audio frequency power amplifier chip U3 connects the 15th pin of microcontroller U5；In power circuit 5, open
The 1st pin for closing voltage regulator U1 connects the 1st terminal of toggle switch S1, and while be connected with the positive pole of polar capacitor E2,
The negative pole of polarized electric capacity E2 connects the negative pole of battery BT1, and while the 3rd and the 5th pin of connecting valve voltage regulator U1,
3rd pin of regulator U1 connects digitally, and the positive pole of battery BT1 connects the 2nd terminal of toggle switch S1, switch electricity
The negative pole of the 2nd pin connection diode D2 of pressure adjuster U1 and one end of inductance L1, the positive pole of diode D2 connects digitally, and
The negative pole of polar capacitor E1 is connected with simultaneously, and the positive pole of polarized electric capacity E1 connects the other end of inductance L1, and inductance L1's is another
End produces 3.3V DC voltage VCC3.3, while the 4th pin of regulator U1 is connected to, the 5th of toggle switch S1 the
After the 7th terminal short circuit, connect one end of resistance R2, the other end of resistance R2 is connected with the other end of inductance L1；Power supply electricity
Between road 5 and master cpu 1, the 6th and the 8th terminal of toggle switch S1 is connected respectively to the 42nd and the 43rd of microcontroller U5 and draws
Pin；In LCD liquid crystal interfaces circuit 6, the 8th pin of lcd driver U4 connects one end of resistance R16, the other end of resistance R16
Connection 3.3V DC voltage VCC3.3, and while connect lcd driver U4 the 9th pin and electric capacity C6 one end, electric capacity C6's
Digitally, the 1st～4 pin of 47 segment numeral LCD liquid crystal display DS1 is respectively with the 16th～13 of lcd driver U4 for another termination
Pin is connected, the 5th～13 pin of 47 segment numeral LCD liquid crystal display DS1 respectively with the 48th～40 pin of lcd driver U4
It is connected；Between LCD liquid crystal interfaces circuit 6 and master cpu 1, the 1st～4 pin of lcd driver U4 respectively with microcontroller U5
The the 4th, the 3rd, the 2nd be connected with the 46th pin.
As shown in fig. 6, in power circuit 5, battery BT1 is 9V alkaline batteries.In power circuit 5, toggle switch S1
For rotating disk toggle switch.
As shown in fig. 7, between LCD liquid crystal interfaces circuit 6 and master cpu 1, the 1st～4 pin of lcd driver U4 passes through
SPI communication interfaces are connected respectively with the pin of the 4th, the 3rd, the 2nd and the 46th of microcontroller U5.
This ammeter rapid stealing detecting instrument, its main frame and split-core type meter collection are integrated.Electric energy meter is respectively clamped in split-core type meter binding clip
Live wire enters line, zero line outlet and live wire outlet, you can the live wire line current of measurement electric energy meter circuit, zero line go out line current and fire
Line goes out line current, and the pressure-wire of electric energy meter is accessed into the input electricity of i.e. measurable electric energy meter on the voltage input-terminal of stealing detecting instrument
Pressure；After stealing detecting instrument clamps the live wire into electric energy meter to be entered line or zero line outlet or live wire outlet, access pressure-wire, in input stealing detecting instrument
Voltage, current analog signal after the analog signal processing 2 on stealing detecting instrument internal pull-up circuit plate is nursed one's health, it is directly defeated
Enter in the microcontroller U5 of master cpu 1, Jing after the AD conversion of microcontroller U5 inside, obtain instantaneous voltage, current sampling data,
Sampled value is calculated the electrical quantitys such as voltage, electric current through microcontroller U5, and various electrical quantitys are sent to LCD liquid crystal interface circuits
6 show, if it is desired to keep the electrical quantity content shown by LCD liquid crystal interfaces circuit 6 not refresh, can click keyboard circuit
Control button KEY1 in 3.
The electrical quantity Computing Principle of this ammeter rapid stealing detecting instrument is as follows：
1st, voltage computing formula
In formula, Ua and uak is respectively voltage effective value and instantaneous value, and N is every cycle AC sampling points；
2nd, Current calculation formula
In formula, Ia and iak is respectively current effective value and instantaneous value, and N is every cycle AC sampling points.
Using this ammeter rapid stealing detecting instrument, judge whether electric energy meter is normal, has, the principle without electricity filching behavior is：First, exist
The live wire that electric energy meter is snapped in split-core type meter binding clip enters line, clicks control button KEY2 in keyboard circuit 3, measures electric energy meter circuit
Live wire line current Ia, and by LCD liquid crystal interfaces circuit 6 show this current value；Then, change and snapped in split-core type meter binding clip
Circuit, the zero line outlet of electric energy meter is snapped in split-core type meter binding clip, then click control button KEY2 in keyboard circuit 3, survey
The zero line of amount electric energy meter circuit goes out line current Ib, and shows this current value by LCD liquid crystal interfaces circuit 6；Stealing detecting instrument measurement fire
Line line current Ia or zero line go out the internal arithmetic process of line current Ib, the live wire line current simulation letter being input in stealing detecting instrument
Number or zero line outlet current analog signal, through on stealing detecting instrument internal pull-up circuit plate analog signal processing 2 nurse one's health after,
It is directly inputted in the microcontroller U5 of master cpu 1, Jing after the AD conversion of microcontroller U5 inside, obtains live wire and enter line or zero line
The transient current sampled value of outlet, live wire enters line or the transient current sampled value of zero line outlet is calculated through microcontroller U5
Live wire enters the current effective value of line or zero line outlet, that is, measure live wire line current Ia or zero line goes out line current Ib；Live wire enters line
Electric current Ia and zero line go out the equal side of line current Ib measure come after, stealing detecting instrument is judged according to following basis for estimation, sound circuit 4
It is judged that as a result providing corresponding beautiful voice prompting.Described basis for estimation is：As (Ia/Ib -1)>When 15%,
Prompting " zero line may disconnect ", as (Ia/Ib -1)<When 15%, point out " having outside line to access ", and both the above situation,
Show that electric energy table status are abnormal, there may be electricity filching behavior.
In addition, by this ammeter rapid stealing detecting instrument, measuring the input voltage of electric energy meter, it can be determined that the voltage of supply line
Whether quality is good, and whether whether voltage is too high or too low, allowing in the range of fluctuation.
Claims (4)
1. a kind of ammeter rapid stealing detecting instrument, including host shell, split-core type meter and operating circuit plate, described host shell is provided with liquid
Crystalline substance screen observation window, described split-core type meter is made up of binding clip housing and iron core, and described operating circuit plate is arranged in host shell, its
It is characterized in that：Master cpu is included on described operating circuit plate（1）, analog signal processing（2）, keyboard circuit（3）, language
Sound circuit（4）, power circuit（5）With LCD liquid crystal interface circuits（6）, master cpu（1）Inside there are microcontroller U5, external clock electricity
Road, pull down resistor R17, CPU electrification reset circuit, cpu power VCC decoupling capacitances, polarized electric capacity E5, AD interface analog power
Filter circuit and 0 Europe resistance R21, wherein, model STM32F100CBT6 of microcontroller U5 has 8M in outer clock circuit
There is resistance R18 and electric capacity C9 in crystal oscillator Y1 and electric capacity C7 and C8, CPU electrification reset circuit, in cpu power VCC decoupling capacitances
There are electric capacity C10, C11 and C12, there is inductance L2, electric capacity C13 and polarized electric capacity E6 in AD interface analog power filter circuits；Before
End signal modulate circuit（2）Inside there is voltage follower U2A, U2C and U2D, the alternating current in four-way high precision operating amplifier
Stream sampling input terminal P1, the sub- P2 of ac voltage input, resistance R1, R3～R10 and R12, electric capacity C1～C3 and clamper two
Pole pipe D1 and D3～D5, model SGM8554 of its four-way high precision operating amplifier, clamp diode D1's and D3～D5
Model is IN4148；Keyboard circuit（3）Inside there are control button KEY1 and KEY2 and resistance R11 and R13；Sound circuit（4）
Inside there are audio frequency power amplifier chip U3, polarized electric capacity E3 and E4, electric capacity C4 and C5, resistance R14 and R15 and loudspeaker SP1, its audio frequency
Model SGM4890YMS of power amplifier chips U3；Power circuit（5）Inside there are battery BT1, regulator U1, polarized electricity
Hold E1 and E2, diode D2, inductance L1, resistance R2 and toggle switch S1, the model of its regulator U1
LM2596S-3.3, model STPS2L25U of diode D2, model DO3316P-104 of inductance L1, toggle switch S1's
Model SW DIP-6；LCD liquid crystal interface circuits（6）Inside there are lcd driver U4, resistance R16, electric capacity C6 and 47 segment numerals
LCD liquid crystal display DS1, model HT1621B of its lcd driver U4, the model of 47 segment numeral LCD liquid crystal display DS1
GDC8310；
Its annexation is：In master cpu（1）Interior, the 1st pin of microcontroller U5 connects by power circuit（5）Produce
The mutual short circuit of the pin of 23rd, the 35th and the 47th of 3.3V DC voltage VCC3.3, microcontroller U5 is followed by digitally, external clock
The two ends of circuit crystal oscillator Y1 are connected respectively to the 5th and the 6th pin of microcontroller U5, and the one of pull down resistor R17 terminates digitally,
Its other end is connected to the 44th pin of microcontroller U5, and one end of resistance R18 and electric capacity C9 connects in CPU electrification reset circuits
It is connected to the 7th pin of microcontroller U5, the other end connection 3.3V DC voltage VCC3.3 of resistance R18, the other end of electric capacity C9
Connect digitally, one end of electric capacity C10, C11 and C12 is connected respectively to the of microcontroller U5 in cpu power VCC decoupling capacitances
24th, the 36th and the 48th pin, its other end connects digitally, the positive pole connection 3.3V DC voltages of polarized electric capacity E5
VCC3.3, and while be connected with the pin of the 24th, the 36th and the 48th of microcontroller U5, the negative pole of polarized electric capacity E5 connects numeral
Ground, one end connection 3.3V DC voltage VCC3.3 of AD interface analog power filter circuit internal inductances L2, the other end of inductance L2
The 9th pin of microcontroller U5 is connected to, and draws analog power voltage signal AVCC, one end connection polarized of electric capacity C13
The positive pole of electric capacity E6, and while connect the other end of inductance L2, the other end of electric capacity C13 and the negative pole of polarized electric capacity E6 connect
The 8th pin of microcontroller U5 is connected to, 0 Europe resistance R21 is digitally to connect resistance with simulation ground single-point, and its one end is connected to micro-
8th pin of controller U5, its another termination is digitally；In analog signal processing（2）Interior, four-way high-accuracy arithmetic is put
The positive electricity source connection of voltage follower U2A, U2C and U2D in big device is all connected with by master cpu（1）The simulation electricity of interior extraction
Source voltage signal AVCC, wherein, electric capacity C2 is also associated between the positive electricity source connection and simulation ground of voltage follower U2A, electricity
The negative electricity source connection of pressure follower U2A, U2C and U2D connects simulation ground, and voltage follower U2D and resistance R6 and R9 are constituted
1.65V voltage references produce circuit, after one end of resistance R6 is connected with one end of resistance R9, are connected to voltage follower
The inverting input of U2D, the other end connection simulation power supply voltage signal AVCC of resistance R6, another termination simulation of resistance R9
Ground, the output end of voltage follower U2D is connected with its in-phase input end, and draws 1.65V voltage reference signal REF, exchange
Current sample input terminal P1 connections are wound on the two ends of enamel-covered wire output line on split-core type meter iron core, alternating current sampling input terminal P1
The 1st pin connect resistance R3 one end, alternating current sampling input terminal P1 the 2nd pin connection resistance R3 the other end with
And one end of resistance R4, the other end connection 1.65V voltage reference signal REF of resistance R4, positive pole and the pincers of clamp diode D1
After the position negative pole of diode D3 and one end of resistance R3 are connected, the in-phase input end of voltage follower U2A is connected to, is clamped
The negative pole connection simulation power supply voltage signal AVCC of position diode D1, the positive pole of clamp diode D3 connects simulation ground, voltage follow
The output end of device U2A is connected with its inverting input, and while connects one end of resistance R1, the other end connection of resistance R1 is electric
Hold one end of C1, another termination simulation ground of electric capacity C1, the sub- P2 connections exchange 0～400V power supplys of ac voltage input, exchange
1st and the 2nd pin of voltage input-terminal P2 connects respectively one end of resistance R5 and resistance R10, and resistance R5's and resistance R10 is another
One end connects respectively the two ends of resistance R8, and one end of resistance R12 connects one end of resistance R10, the other end connection of resistance R12
The positive pole of 1.65V voltage reference signal REF, clamp diode D4 and the negative pole of clamp diode D5 and resistance R10's is another
After end is connected, the in-phase input end of voltage follower U2C, the negative pole connection analog power electricity of clamp diode D4 are connected to
The positive pole of pressure signal AVCC, clamp diode D5 connects simulation ground, and the output end of voltage follower U2C is connected with its inverting input
Connect, and while connect one end of resistance R7, the other end of resistance R7 connects one end of electric capacity C3, another termination simulation of electric capacity C3
Ground；Analog signal processing（2）With master cpu（1）Between, the other end of resistance R1 is connected to the 12nd of microcontroller U5 and draws
Pin, the other end of resistance R7 is connected to the 13rd pin of microcontroller U5；In keyboard circuit（3）It is interior, the of control button KEY1
1st, the mutual short circuit of the terminal of the 2nd, the 4th and the 5th, connects one end of resistance R11 after the 3rd and the 6th terminal short circuit of control button KEY1,
The other end connection 3.3V DC voltage VCC3.3 of resistance R11, and while connect one end of resistance R13, the other end of resistance R13
2nd and the 3rd terminal of connection control button KEY2, the 1st and the 4th terminal phase short circuit of control button KEY2；Keyboard circuit（3）With
Master cpu（1）Between, the 5th terminal of control button KEY1 is connected to the 32nd pin of microcontroller U5, control button KEY2
1st terminal is connected to the 33rd pin of microcontroller U5；In sound circuit（4）It is interior, the 6th pin connection of audio frequency power amplifier chip U3
3.3V DC voltage VCC3.3, and while the positive pole of polar capacitor E3 is connected with, the negative pole of polarized electric capacity E3 is connected to audio frequency
7th pin of power amplifier chips U3, the 1st pin of audio frequency power amplifier chip U3 connects one end of electric capacity C4, the other end of electric capacity C4 with
The negative pole of polarized electric capacity E4 is connected, and connects digitally, the positive pole of polarized electric capacity E4 and the 2nd of audio frequency power amplifier chip U3 and
3rd pin is connected, and the 4th pin of audio frequency power amplifier chip U3 connects one end of resistance R14 and resistance R15, and resistance R14's is another
One end of end connection electric capacity C5, the other end of resistance R15 is connected to the 5th pin of audio frequency power amplifier chip U3, the two ends of loudspeaker SP1
It is connected to the 5th and the 8th pin of audio frequency power amplifier chip U3；Sound circuit（4）With master cpu（1）Between, the other end of electric capacity C5
The 14th pin of microcontroller U5 is connected to, the 1st pin of audio frequency power amplifier chip U3 connects the 15th pin of microcontroller U5；
Power circuit（5）Interior, the 1st pin of regulator U1 connects the 1st terminal of toggle switch S1, and while is connected with pole
Property electric capacity E2 positive pole, the negative pole of polarized electric capacity E2 connects the negative pole of battery BT1, and while connecting valve voltage regulator U1
The the 3rd and the 5th pin, the 3rd pin of regulator U1 connects digitally, the positive pole connection toggle switch S1 of battery BT1
The 2nd terminal, regulator U1 the 2nd pin connection diode D2 negative pole and inductance L1 one end, diode D2
Positive pole connect digitally, and while be connected with the negative pole of polar capacitor E1, the positive pole connection inductance L1's of polarized electric capacity E1 is another
One end, the other end of inductance L1 produces 3.3V DC voltage VCC3.3, while the be connected to regulator U1 the 4th draws
Pin, after the 5th and the 7th terminal short circuit of toggle switch S1, connects one end of resistance R2, and the other end of resistance R2 is another with inductance L1
One end is connected；Power circuit（5）With master cpu（1）Between, the 6th and the 8th terminal of toggle switch S1 is connected respectively to micro-control
42nd and the 43rd pin of device U5 processed；In LCD liquid crystal interface circuits（6）It is interior, the 8th pin connection resistance R16 of lcd driver U4
One end, resistance R16 the other end connection 3.3V DC voltage VCC3.3, and while connect lcd driver U4 the 9th pin and
One end of electric capacity C6, another termination of electric capacity C6 digitally, the 1st～4 pin of 47 segment numeral LCD liquid crystal display DS1 respectively with
16th～13 pin of lcd driver U4 is connected, the 5th～13 pin of 47 segment numeral LCD liquid crystal display DS1 respectively with LCD
48th～40 pin of driver U4 is connected；LCD liquid crystal interface circuits（6）With master cpu（1）Between, lcd driver U4's
1st～4 pin is connected respectively with the pin of the 4th, the 3rd, the 2nd and the 46th of microcontroller U5；
Stealing detecting instrument measurement live wire line current Ia or zero line go out the internal arithmetic process of line current Ib：In input stealing detecting instrument
Live wire line current analog signal or zero line outlet current analog signal, the front end letter on stealing detecting instrument internal pull-up circuit plate
Number modulate circuit（2）After conditioning, it is directly inputted in the microcontroller U5 of master cpu 1, Jing microcontrollers U5 inside AD conversion
Afterwards, the transient current sampled value that live wire enters line or zero line outlet is obtained, live wire enters the transient current sampled value of line or zero line outlet
The current effective value that live wire enters line or zero line outlet is calculated through microcontroller U5, that is, measures live wire line current Ia or zero
Line goes out line current Ib；Live wire line current Ia and zero line go out the equal side of line current Ib measure come after, stealing detecting instrument according to it is following judge according to
According to being judged, sound circuit（4）Corresponding beautiful voice prompting is provided according to judged result；Described basis for estimation
For：As Ia/Ib -1>When 15%, point out " zero line may disconnect ", as Ia/Ib -1<When 15%, point out " have outside line to connect
Enter ", and both the above situation, show that electric energy table status are abnormal, there may be electricity filching behavior.
2. ammeter rapid stealing detecting instrument according to claim 1, is characterized in that：In power circuit（5）Interior, battery BT1 is 9V
Alkaline battery.
3. ammeter rapid stealing detecting instrument according to claim 1 and 2, is characterized in that：In power circuit（5）It is interior, toggle switch
S1 is rotating disk toggle switch.
4. ammeter rapid stealing detecting instrument according to claim 3, is characterized in that：LCD liquid crystal interface circuits（6）With master cpu
（1）Between, the 1st～4 pin of lcd driver U4 by SPI communication interfaces respectively with microcontroller U5 the 4th, the 3rd, the 2nd and
46th pin is connected.
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| CN103885027B (en) * | 2014-03-24 | 2016-08-17 | 国家电网公司 | A kind of electric energy meter field transmission of quantity value device |
| CN107831348B (en) * | 2017-09-28 | 2020-08-07 | 国网甘肃省电力公司 | System and method for rapidly detecting whether power is stolen |
Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0940309A2 (en) * | 1994-06-22 | 1999-09-08 | Intra International AB | Connection of a control circuit for an antitheft battery |
| CN1419131A (en) * | 2002-12-18 | 2003-05-21 | 王荣安 | Intelligent fraudulent use prevention electric energy measuring method and device thereof |
| CN201133914Y (en) * | 2007-11-23 | 2008-10-15 | 上海贝岭股份有限公司 | Electric energy metering chip double-current comparing structure |
| CN201555944U (en) * | 2009-12-07 | 2010-08-18 | 河南省电力公司许昌供电公司 | Electric energy meter error tester |
| CN202196106U (en) * | 2011-09-15 | 2012-04-18 | 深圳市北高智电子有限公司 | Antistealing-electricity digital single-phase ammeter |
| CN102508196A (en) * | 2011-12-19 | 2012-06-20 | 邯郸供电公司 | On-site color screen calibrator for single-phase electricity meter |
| CN102565751A (en) * | 2012-01-17 | 2012-07-11 | 钜泉光电科技(上海)股份有限公司 | Device for developing programmable single-phase electric energy metering chip |
| CN103035106A (en) * | 2012-09-25 | 2013-04-10 | 邯郸供电公司 | Wireless remote control power-stealing detector |
| CN202929077U (en) * | 2012-07-25 | 2013-05-08 | 国网电力科学研究院 | Electricity stealing resistant device and its system |
| CN203480021U (en) * | 2013-10-15 | 2014-03-12 | 国家电网公司 | Rapid electricity-stealing checking device for electricity meter |
-
2013
- 2013-10-15 CN CN201310480554.1A patent/CN103513222B/en active Active
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0940309A2 (en) * | 1994-06-22 | 1999-09-08 | Intra International AB | Connection of a control circuit for an antitheft battery |
| CN1419131A (en) * | 2002-12-18 | 2003-05-21 | 王荣安 | Intelligent fraudulent use prevention electric energy measuring method and device thereof |
| CN201133914Y (en) * | 2007-11-23 | 2008-10-15 | 上海贝岭股份有限公司 | Electric energy metering chip double-current comparing structure |
| CN201555944U (en) * | 2009-12-07 | 2010-08-18 | 河南省电力公司许昌供电公司 | Electric energy meter error tester |
| CN202196106U (en) * | 2011-09-15 | 2012-04-18 | 深圳市北高智电子有限公司 | Antistealing-electricity digital single-phase ammeter |
| CN102508196A (en) * | 2011-12-19 | 2012-06-20 | 邯郸供电公司 | On-site color screen calibrator for single-phase electricity meter |
| CN102565751A (en) * | 2012-01-17 | 2012-07-11 | 钜泉光电科技(上海)股份有限公司 | Device for developing programmable single-phase electric energy metering chip |
| CN202929077U (en) * | 2012-07-25 | 2013-05-08 | 国网电力科学研究院 | Electricity stealing resistant device and its system |
| CN103035106A (en) * | 2012-09-25 | 2013-04-10 | 邯郸供电公司 | Wireless remote control power-stealing detector |
| CN203480021U (en) * | 2013-10-15 | 2014-03-12 | 国家电网公司 | Rapid electricity-stealing checking device for electricity meter |
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|---|---|
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